diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index 5c31e40..27f5dd2 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -10,7 +10,15 @@ if(SOFTWARE_KEYBOARD) add_definitions(-DSOFTWARE_KEYBOARD) endif() +add_definitions(-DSPNG_USE_MINIZ) +include_directories( + ${PROJECT_SOURCE_DIR}/thirdparty/libopenui/src/thirdparty/miniz + ${PROJECT_SOURCE_DIR}/thirdparty/libopenui/src/thirdparty/libspng + ) + set(LIBOPENUI_SRC + thirdparty/miniz/miniz.c + thirdparty/libspng/spng.c libopenui_file.cpp bitmapbuffer.cpp window.cpp diff --git a/src/bitmapbuffer.cpp b/src/bitmapbuffer.cpp index 4ca455d..6d38097 100755 --- a/src/bitmapbuffer.cpp +++ b/src/bitmapbuffer.cpp @@ -964,10 +964,13 @@ void drawSolidRect(BitmapBuffer * dc, coord_t x, coord_t y, coord_t w, coord_t h BitmapBuffer * BitmapBuffer::load(const char * filename) { const char * ext = getFileExtension(filename); - if (ext && !strcmp(ext, ".bmp")) - return load_bmp(filename); - else - return load_stb(filename); + if (ext) { + if (!strcmp(ext, ".bmp")) + return load_bmp(filename); + else if (!strcmp(ext, ".png")) + return load_png(filename); + } + return nullptr; } BitmapMask * BitmapMask::load(const char * filename) @@ -1216,157 +1219,126 @@ BitmapBuffer * BitmapBuffer::load_bmp(const char * filename) return bmp; } -#define STB_IMAGE_IMPLEMENTATION -#define STBI_ONLY_PNG -#define STBI_ONLY_JPEG -#define STBI_ONLY_BMP -#define STBI_ONLY_GIF -#define STBI_NO_STDIO -#define STBI_NO_HDR -#define STBI_NO_LINEAR - -#define STBI_MALLOC(sz) stb_malloc(sz) -#define STBI_REALLOC_SIZED(p,oldsz,newsz) stb_realloc(p,oldsz,newsz) -#define STBI_FREE(p) stb_free(p) +#include "thirdparty/libspng/spng.h" -#if !defined(TRACE_STB_MALLOC) -#define TRACE_STB_MALLOC(...) -#endif - -void * stb_malloc(unsigned int size) +static int fatfs_file_read_fn(spng_ctx *ctx, void *user, void *data, size_t n) { -#if defined(STB_MALLOC_MAXSIZE) - if (size > STB_MALLOC_MAXSIZE) { - TRACE("malloc size %d refused", size); - return nullptr; + FIL * fp = (FIL *)user; + UINT br = 0; + FRESULT res = f_read(fp, data, n, &br); + if (res == FR_OK) { + return n == br ? 0 : SPNG_IO_EOF; + } + else { + return SPNG_IO_ERROR; } -#endif - void * res = malloc(size); - TRACE_STB_MALLOC("malloc %d = %p", size, res); - return res; } -void stb_free(void *ptr) +BitmapBuffer * BitmapBuffer::load_png(const char * filename) { - TRACE_STB_MALLOC("free %p", ptr); - free(ptr); -} + auto imgFile = (FIL *)malloc(sizeof(FIL)); + if (!imgFile) + return nullptr; -void *stb_realloc(void *ptr, unsigned int oldsz, unsigned int newsz) -{ -#if defined(STB_MALLOC_MAXSIZE) - if (newsz > STB_MALLOC_MAXSIZE) { - TRACE("realloc size %d refused", newsz); + FRESULT result = f_open(imgFile, filename, FA_OPEN_EXISTING | FA_READ); + if (result != FR_OK) { + TRACE("load_png: f_open failed"); + free(imgFile); return nullptr; } -#endif - void * res = realloc(ptr, newsz); - TRACE_STB_MALLOC("realloc %p, %d -> %d = %p", ptr, oldsz, newsz, res); - return res; -} -#pragma GCC diagnostic ignored "-Wsign-compare" -#pragma GCC diagnostic ignored "-Wunused-but-set-variable" -#undef __I -#define STBI_NO_HDR -#define STBI_NO_PIC -#define STBI_NO_GIF -#define STBI_NO_PNM -#define STBI_NO_PSD -#define STBI_NO_TGA -#define STBI_NO_BMP -#define STB_IMAGE_IMPLEMENTATION -#include "thirdparty/stb/stb_image.h" - -// fill 'data' with 'size' bytes. return number of bytes actually read -int stbc_read(void *user, char * data, int size) -{ - FIL * fp = (FIL *)user; - UINT br = 0; - FRESULT res = f_read(fp, data, size, &br); - if (res == FR_OK) { - return (int)br; + auto ctx = spng_ctx_new(0); + if (!ctx) { + TRACE("load_png: spng_ctx_new failed"); + free(imgFile); + return nullptr; } - return 0; -} - -// skip the next 'n' bytes, or 'unget' the last -n bytes if negative -void stbc_skip(void *user, int n) -{ - FIL * fp = (FIL *)user; - f_lseek(fp, f_tell(fp) + n); -} -// returns nonzero if we are at end of file/data -int stbc_eof(void *user) -{ - FIL * fp = (FIL *)user; - int res = f_eof(fp); - return res; -} + spng_set_crc_action(ctx, SPNG_CRC_USE, SPNG_CRC_USE); + size_t limit = 1024 * 32; + spng_set_chunk_limits(ctx, limit, limit); + spng_set_png_stream(ctx, fatfs_file_read_fn, &imgFile); -// callbacks for stb-image -const stbi_io_callbacks stbCallbacks = { - stbc_read, - stbc_skip, - stbc_eof -}; + spng_ihdr ihdr; + auto r = spng_get_ihdr(ctx, &ihdr); + if (r) { + TRACE("load_png: spng_get_ihdr failed"); + spng_ctx_free(ctx); + free(imgFile); + return nullptr; + } -BitmapBuffer * BitmapBuffer::load_stb(const char * filename) -{ - auto imgFile = (FIL *)malloc(sizeof(FIL)); - if (!imgFile) + spng_plte plte; + r = spng_get_plte(ctx, &plte); + if (r && r != SPNG_ECHUNKAVAIL) { + TRACE("load_png: spng_get_plte failed %d", r); + spng_ctx_free(ctx); + free(imgFile); return nullptr; + } - FRESULT result = f_open(imgFile, filename, FA_OPEN_EXISTING | FA_READ); - if (result != FR_OK) { + auto fmt = (ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA || ihdr.color_type == SPNG_COLOR_TYPE_INDEXED) ? SPNG_FMT_RGBA8 : SPNG_FMT_RGB8; + + size_t out_size, out_width; + r = spng_decoded_image_size(ctx, fmt, &out_size); + if (r) { + TRACE("load_png: spng_decoded_image_size failed"); + spng_ctx_free(ctx); free(imgFile); return nullptr; } - int w, h, n; - unsigned char * img = stbi_load_from_callbacks(&stbCallbacks, imgFile, &w, &h, &n, 4); - f_close(imgFile); - free(imgFile); + TRACE("load_png %s: %ux%u %d", filename, ihdr.width, ihdr.height, ihdr.color_type); - if (!img) { - TRACE("load_stb(%s) failed: %s", filename, stbi_failure_reason()); + auto * bmp = new BitmapBuffer(fmt == SPNG_FMT_RGBA8 ? BMP_ARGB4444 : BMP_RGB565, ihdr.width, ihdr.height); + if (!bmp) { + TRACE("load_png() bitmap alloc failed"); + spng_ctx_free(ctx); + free(imgFile); return nullptr; } - // convert to RGB565 or ARGB4444 format - auto bmp = new BitmapBuffer(n == 4 ? BMP_ARGB4444 : BMP_RGB565, w, h); - if (bmp == nullptr) { - TRACE("load_stb(%s) malloc failed", filename); - stbi_image_free(img); + r = spng_decode_image(ctx, nullptr, 0, fmt, SPNG_DECODE_PROGRESSIVE | SPNG_DECODE_TRNS); + if (r) { + TRACE("spng_decode_image failed"); + spng_ctx_free(ctx); + free(imgFile); return nullptr; } -#if 0 - DMABitmapConvert(bmp->data, img, w, h, n == 4 ? DMA2D_ARGB4444 : DMA2D_RGB565); -#else - pixel_t * dest = bmp->getPixelPtrAbs(0, 0); - const uint8_t * p = img; - if (n == 4) { - for (int row = 0; row < h; ++row) { - for (int col = 0; col < w; ++col) { + /* ihdr.height will always be non-zero if spng_get_ihdr() succeeds */ + out_width = out_size / ihdr.height; + auto * out = (uint16_t *)malloc(out_width); + + struct spng_row_info row_info; // = {0}; + + do { + r = spng_get_row_info(ctx, &row_info); + if (r) + break; + r = spng_decode_row(ctx, out, out_width); + pixel_t * dest = bmp->getPixelPtrAbs(0, row_info.row_num); + const uint8_t * p = (uint8_t *)out; + if (fmt == SPNG_FMT_RGBA8) { + for (unsigned col = 0; col < ihdr.width; ++col) { *dest = ARGB4444(p[3], p[0], p[1], p[2]); MOVE_TO_NEXT_RIGHT_PIXEL(dest); p += 4; } } - } - else { - for (int row = 0; row < h; ++row) { - for (int col = 0; col < w; ++col) { + else { + for (unsigned col = 0; col < ihdr.width; ++col) { *dest = RGB565(p[0], p[1], p[2]); MOVE_TO_NEXT_RIGHT_PIXEL(dest); - p += 4; + p += 3; } } } -#endif + while (!r); + + free(imgFile); + free(out); + spng_ctx_free(ctx); - stbi_image_free(img); return bmp; } diff --git a/src/bitmapbuffer.h b/src/bitmapbuffer.h index df43844..a2ab262 100755 --- a/src/bitmapbuffer.h +++ b/src/bitmapbuffer.h @@ -447,7 +447,7 @@ class BitmapBuffer: public BitmapBufferBase protected: static BitmapBuffer * load_bmp(const char * filename); - static BitmapBuffer * load_stb(const char * filename); + static BitmapBuffer * load_png(const char * filename); inline bool applyClippingRect(coord_t & x, coord_t & y, coord_t & w, coord_t & h) const { diff --git a/src/thirdparty/libspng/spng.c b/src/thirdparty/libspng/spng.c new file mode 100755 index 0000000..8cc7704 --- /dev/null +++ b/src/thirdparty/libspng/spng.c @@ -0,0 +1,6744 @@ +/* SPDX-License-Identifier: (BSD-2-Clause AND libpng-2.0) */ + +#define SPNG__BUILD + +#include "spng.h" + +#include +#include +#include +#include + +#define ZLIB_CONST + +#ifdef __FRAMAC__ + #define SPNG_DISABLE_OPT + #include "tests/framac_stubs.h" +#else + #ifdef SPNG_USE_MINIZ + #include + #else + #include + #endif +#endif + +#ifdef SPNG_MULTITHREADING + #include +#endif + +#define SPNG_READ_SIZE (8192) +#define SPNG_WRITE_SIZE SPNG_READ_SIZE + +#define SPNG_TARGET_CLONES(x) + +#ifndef SPNG_DISABLE_OPT + + #if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64) + #define SPNG_X86 + + #if defined(__x86_64__) || defined(_M_X64) + #define SPNG_X86_64 + #endif + + #elif defined(__aarch64__) || defined(_M_ARM64) /* || defined(__ARM_NEON) */ + #define SPNG_ARM /* NOTE: only arm64 builds are tested! */ + #else + #pragma message "disabling SIMD optimizations for unknown target" + #define SPNG_DISABLE_OPT + #endif + + #if defined(SPNG_X86_64) && defined(SPNG_ENABLE_TARGET_CLONES) + #undef SPNG_TARGET_CLONES + #define SPNG_TARGET_CLONES(x) __attribute__((target_clones(x))) + #else + #define SPNG_TARGET_CLONES(x) + #endif + + #ifndef SPNG_DISABLE_OPT + static void defilter_sub3(size_t rowbytes, unsigned char *row); + static void defilter_sub4(size_t rowbytes, unsigned char *row); + static void defilter_avg3(size_t rowbytes, unsigned char *row, const unsigned char *prev); + static void defilter_avg4(size_t rowbytes, unsigned char *row, const unsigned char *prev); + static void defilter_paeth3(size_t rowbytes, unsigned char *row, const unsigned char *prev); + static void defilter_paeth4(size_t rowbytes, unsigned char *row, const unsigned char *prev); + + #if defined(SPNG_ARM) + static uint32_t expand_palette_rgba8_neon(unsigned char *row, const unsigned char *scanline, const unsigned char *plte, uint32_t width); + static uint32_t expand_palette_rgb8_neon(unsigned char *row, const unsigned char *scanline, const unsigned char *plte, uint32_t width); + #endif + #endif +#endif + +#if defined(_MSC_VER) + #pragma warning(push) + #pragma warning(disable: 4244) +#endif + +#if (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || defined(__BIG_ENDIAN__) + #define SPNG_BIG_ENDIAN +#else + #define SPNG_LITTLE_ENDIAN +#endif + +enum spng_state +{ + SPNG_STATE_INVALID = 0, + SPNG_STATE_INIT = 1, /* No PNG buffer/stream is set */ + SPNG_STATE_INPUT, /* Input PNG was set */ + SPNG_STATE_IHDR, /* IHDR was read */ + SPNG_STATE_FIRST_IDAT, /* Reached first IDAT */ + SPNG_STATE_DECODE_INIT, /* Decoder is ready for progressive reads */ + SPNG_STATE_ENCODE_INIT = SPNG_STATE_DECODE_INIT, + SPNG_STATE_EOI, /* Reached the last scanline/row */ + SPNG_STATE_LAST_IDAT, /* Reached last IDAT, set at end of decode_image() */ + SPNG_STATE_AFTER_IDAT, /* */ + SPNG_STATE_IEND, /* Reached IEND */ +}; + +enum spng__internal +{ + SPNG__IO_SIGNAL = 1 < 9 +}; + +#define SPNG_STR(x) _SPNG_STR(x) +#define _SPNG_STR(x) #x + +#define SPNG_VERSION_STRING SPNG_STR(SPNG_VERSION_MAJOR) "." \ + SPNG_STR(SPNG_VERSION_MINOR) "." \ + SPNG_STR(SPNG_VERSION_PATCH) + +#define SPNG_GET_CHUNK_BOILERPLATE(chunk) \ + if(ctx == NULL) return 1; \ + int ret = read_chunks(ctx, 0); \ + if(ret) return ret; \ + if(!ctx->stored.chunk) return SPNG_ECHUNKAVAIL; \ + if(chunk == NULL) return 1 + +#define SPNG_SET_CHUNK_BOILERPLATE(chunk) \ + if(ctx == NULL || chunk == NULL) return 1; \ + if(ctx->data == NULL) ctx->encode_only = 1; \ + int ret = read_chunks(ctx, 0); \ + if(ret) return ret + +struct spng_subimage +{ + uint32_t width; + uint32_t height; + size_t out_width; /* byte width based on output format */ + size_t scanline_width; +}; + +struct spng_text2 +{ + int type; + char *keyword; + char *text; + + size_t text_length; + + uint8_t compression_flag; /* iTXt only */ + char *language_tag; /* iTXt only */ + char *translated_keyword; /* iTXt only */ + + size_t cache_usage; + char user_keyword_storage[80]; +}; + +struct decode_flags +{ + unsigned apply_trns: 1; + unsigned apply_gamma: 1; + unsigned use_sbit: 1; + unsigned indexed: 1; + unsigned do_scaling: 1; + unsigned interlaced: 1; + unsigned same_layout: 1; + unsigned zerocopy: 1; + unsigned unpack: 1; +}; + +struct encode_flags +{ + unsigned chunk_zerocopy: 1; + unsigned interlace: 1; + unsigned same_layout: 1; + + int filter_choice; +}; + +struct spng_chunk_bitfield +{ + unsigned ihdr: 1; + unsigned plte: 1; + unsigned chrm: 1; + unsigned iccp: 1; + unsigned gama: 1; + unsigned sbit: 1; + unsigned srgb: 1; + unsigned text: 1; + unsigned bkgd: 1; + unsigned hist: 1; + unsigned trns: 1; + unsigned phys: 1; + unsigned splt: 1; + unsigned time: 1; + unsigned offs: 1; + unsigned exif: 1; + unsigned unknown: 1; +}; + +/* Packed sample iterator */ +struct spng__iter +{ + const uint8_t mask; + unsigned shift_amount; + const unsigned initial_shift, bit_depth; + const unsigned char *samples; +}; + +union spng__decode_plte +{ + struct spng_plte_entry rgba[256]; + unsigned char rgb[256 * 3]; + unsigned char raw[256 * 4]; + uint32_t align_this; +}; + +struct spng__deflate_options +{ + int compression_level; + int window_bits; + int mem_level; + int strategy; + int data_type; +}; + +typedef void spng__undo(spng_ctx *ctx); + +struct spng_ctx +{ + size_t data_size; + size_t bytes_read; + unsigned char *stream_buf; + const unsigned char *data; + + /* User-defined pointers for streaming */ + spng_read_fn *read_fn; + void *read_user_ptr; + + spng_write_fn *write_fn; + void *write_user_ptr; + + /* Used for buffer reads */ + const unsigned char *png_base; + size_t bytes_left; + size_t last_read_size; + + /* Used for encoding */ + int user_owns_out_png; + unsigned char *out_png; + unsigned char *write_ptr; + size_t out_png_size; + size_t bytes_encoded; + + /* These are updated by read_header()/read_chunk_bytes() */ + struct spng_chunk current_chunk; + uint32_t cur_chunk_bytes_left; + uint32_t cur_actual_crc; + + struct spng_alloc alloc; + + int flags; /* context flags */ + int fmt; + + enum spng_state state; + + unsigned streaming: 1; + + unsigned inflate: 1; + unsigned deflate: 1; + unsigned encode_only: 1; + unsigned strict: 1; + unsigned discard: 1; + unsigned skip_crc: 1; + unsigned keep_unknown: 1; + unsigned prev_was_idat: 1; + + struct spng__deflate_options image_options; + struct spng__deflate_options text_options; + + spng__undo *undo; + + /* input file contains this chunk */ + struct spng_chunk_bitfield file; + + /* chunk was stored with spng_set_*() */ + struct spng_chunk_bitfield user; + + /* chunk was stored by reading or with spng_set_*() */ + struct spng_chunk_bitfield stored; + + /* used to reset the above in case of an error */ + struct spng_chunk_bitfield prev_stored; + + struct spng_chunk first_idat, last_idat; + + uint32_t max_width, max_height; + + size_t max_chunk_size; + size_t chunk_cache_limit; + size_t chunk_cache_usage; + + int crc_action_critical; + int crc_action_ancillary; + + struct spng_ihdr ihdr; + + struct spng_plte plte; + + struct spng_chrm_int chrm_int; + struct spng_iccp iccp; + + uint32_t gama; + + struct spng_sbit sbit; + + uint8_t srgb_rendering_intent; + + uint32_t n_text; + struct spng_text2 *text_list; + + struct spng_bkgd bkgd; + struct spng_hist hist; + struct spng_trns trns; + struct spng_phys phys; + + uint32_t n_splt; + struct spng_splt *splt_list; + + struct spng_time time; + struct spng_offs offs; + struct spng_exif exif; + + uint32_t n_chunks; + struct spng_unknown_chunk *chunk_list; + + struct spng_subimage subimage[7]; + + z_stream zstream; + unsigned char *scanline_buf, *prev_scanline_buf, *row_buf, *filtered_scanline_buf; + unsigned char *scanline, *prev_scanline, *row, *filtered_scanline; + + size_t total_out_size; + size_t out_width; /* total_out_size / ihdr.height */ + + unsigned channels; + unsigned bytes_per_pixel; /* derived from ihdr */ + unsigned pixel_size; /* derived from spng_format+ihdr */ + int widest_pass; + int last_pass; /* last non-empty pass */ + + uint16_t *gamma_lut; /* points to either _lut8 or _lut16 */ + uint16_t *gamma_lut16; + uint16_t gamma_lut8[256]; + unsigned char trns_px[8]; + union spng__decode_plte decode_plte; + struct spng_sbit decode_sb; + struct decode_flags decode_flags; + struct spng_row_info row_info; + + struct encode_flags encode_flags; +}; + +static const uint32_t png_u32max = 2147483647; + +static const uint32_t adam7_x_start[7] = { 0, 4, 0, 2, 0, 1, 0 }; +static const uint32_t adam7_y_start[7] = { 0, 0, 4, 0, 2, 0, 1 }; +static const uint32_t adam7_x_delta[7] = { 8, 8, 4, 4, 2, 2, 1 }; +static const uint32_t adam7_y_delta[7] = { 8, 8, 8, 4, 4, 2, 2 }; + +static const uint8_t png_signature[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; + +static const uint8_t type_ihdr[4] = { 73, 72, 68, 82 }; +static const uint8_t type_plte[4] = { 80, 76, 84, 69 }; +static const uint8_t type_idat[4] = { 73, 68, 65, 84 }; +static const uint8_t type_iend[4] = { 73, 69, 78, 68 }; + +static const uint8_t type_trns[4] = { 116, 82, 78, 83 }; +static const uint8_t type_chrm[4] = { 99, 72, 82, 77 }; +static const uint8_t type_gama[4] = { 103, 65, 77, 65 }; +static const uint8_t type_iccp[4] = { 105, 67, 67, 80 }; +static const uint8_t type_sbit[4] = { 115, 66, 73, 84 }; +static const uint8_t type_srgb[4] = { 115, 82, 71, 66 }; +static const uint8_t type_text[4] = { 116, 69, 88, 116 }; +static const uint8_t type_ztxt[4] = { 122, 84, 88, 116 }; +static const uint8_t type_itxt[4] = { 105, 84, 88, 116 }; +static const uint8_t type_bkgd[4] = { 98, 75, 71, 68 }; +static const uint8_t type_hist[4] = { 104, 73, 83, 84 }; +static const uint8_t type_phys[4] = { 112, 72, 89, 115 }; +static const uint8_t type_splt[4] = { 115, 80, 76, 84 }; +static const uint8_t type_time[4] = { 116, 73, 77, 69 }; + +static const uint8_t type_offs[4] = { 111, 70, 70, 115 }; +static const uint8_t type_exif[4] = { 101, 88, 73, 102 }; + +static inline void *spng__malloc(spng_ctx *ctx, size_t size) +{ + return ctx->alloc.malloc_fn(size); +} + +static inline void *spng__calloc(spng_ctx *ctx, size_t nmemb, size_t size) +{ + return ctx->alloc.calloc_fn(nmemb, size); +} + +static inline void *spng__realloc(spng_ctx *ctx, void *ptr, size_t size) +{ + return ctx->alloc.realloc_fn(ptr, size); +} + +static inline void spng__free(spng_ctx *ctx, void *ptr) +{ + ctx->alloc.free_fn(ptr); +} + +#if defined(SPNG_USE_MINIZ) +static void *spng__zalloc(void *opaque, size_t items, size_t size) +#else +static void *spng__zalloc(void *opaque, uInt items, uInt size) +#endif +{ + spng_ctx *ctx = opaque; + + if(size > SIZE_MAX / items) return NULL; + + size_t len = (size_t)items * size; + + return spng__malloc(ctx, len); +} + +static void spng__zfree(void *opqaue, void *ptr) +{ + spng_ctx *ctx = opqaue; + spng__free(ctx, ptr); +} + +static inline uint16_t read_u16(const void *_data) +{ + const unsigned char *data = _data; + + return (data[0] & 0xFFU) << 8 | (data[1] & 0xFFU); +} + +static inline uint32_t read_u32(const void *_data) +{ + const unsigned char *data = _data; + + return (data[0] & 0xFFUL) << 24 | (data[1] & 0xFFUL) << 16 | + (data[2] & 0xFFUL) << 8 | (data[3] & 0xFFUL); +} + +static inline int32_t read_s32(const void *_data) +{ + const unsigned char *data = _data; + + int32_t ret; + uint32_t val = (data[0] & 0xFFUL) << 24 | (data[1] & 0xFFUL) << 16 | + (data[2] & 0xFFUL) << 8 | (data[3] & 0xFFUL); + + memcpy(&ret, &val, 4); + + return ret; +} + +static inline void write_u16(void *dest, uint16_t x) +{ + unsigned char *data = dest; + + data[0] = x >> 8; + data[1] = x & 0xFF; +} + +static inline void write_u32(void *dest, uint32_t x) +{ + unsigned char *data = dest; + + data[0] = (x >> 24); + data[1] = (x >> 16) & 0xFF; + data[2] = (x >> 8) & 0xFF; + data[3] = x & 0xFF; +} + +static inline void write_s32(void *dest, int32_t x) +{ + uint32_t n = x; + write_u32(dest, n); +} + +/* Returns an iterator for 1,2,4,8-bit samples */ +static struct spng__iter spng__iter_init(unsigned bit_depth, const unsigned char *samples) +{ + struct spng__iter iter = + { + .mask = (uint32_t)(1 << bit_depth) - 1, + .shift_amount = 8 - bit_depth, + .initial_shift = 8 - bit_depth, + .bit_depth = bit_depth, + .samples = samples + }; + + return iter; +} + +/* Returns the current sample unpacked, iterates to the next one */ +static inline uint8_t get_sample(struct spng__iter *iter) +{ + uint8_t x = (iter->samples[0] >> iter->shift_amount) & iter->mask; + + iter->shift_amount -= iter->bit_depth; + + if(iter->shift_amount > 7) + { + iter->shift_amount = iter->initial_shift; + iter->samples++; + } + + return x; +} + +static void u16_row_to_host(void *row, size_t size) +{ + uint16_t *px = row; + size_t i, n = size / 2; + + for(i=0; i < n; i++) + { + px[i] = read_u16(&px[i]); + } +} + +static void u16_row_to_bigendian(void *row, size_t size) +{ + uint16_t *px = (uint16_t*)row; + size_t i, n = size / 2; + + for(i=0; i < n; i++) + { + write_u16(&px[i], px[i]); + } +} + +static void rgb8_row_to_rgba8(const unsigned char *row, unsigned char *out, uint32_t n) +{ + uint32_t i; + for(i=0; i < n; i++) + { + memcpy(out + i * 4, row + i * 3, 3); + out[i*4+3] = 255; + } +} + +static unsigned num_channels(const struct spng_ihdr *ihdr) +{ + if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR) return 3; + else if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA) return 2; + else if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA) return 4; + else return 1; /* grayscale or indexed color */ +} + +/* Calculate scanline width in bits, round up to the nearest byte */ +static int calculate_scanline_width(struct spng_ctx *ctx, uint32_t width, size_t *scanline_width) +{ + if(!width) return SPNG_EINTERNAL; + + size_t res = ctx->channels * ctx->ihdr.bit_depth; + + if(res > SIZE_MAX / width) return SPNG_EOVERFLOW; + res = res * width; + + res += 15; /* Filter byte + 7 for rounding */ + + if(res < 15) return SPNG_EOVERFLOW; + + res /= 8; + + if(res > UINT32_MAX) return SPNG_EOVERFLOW; + + *scanline_width = res; + + return 0; +} + +static int calculate_subimages(struct spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + struct spng_ihdr *ihdr = &ctx->ihdr; + struct spng_subimage *sub = ctx->subimage; + + if(ihdr->interlace_method == 1) + { + sub[0].width = (ihdr->width + 7) >> 3; + sub[0].height = (ihdr->height + 7) >> 3; + sub[1].width = (ihdr->width + 3) >> 3; + sub[1].height = (ihdr->height + 7) >> 3; + sub[2].width = (ihdr->width + 3) >> 2; + sub[2].height = (ihdr->height + 3) >> 3; + sub[3].width = (ihdr->width + 1) >> 2; + sub[3].height = (ihdr->height + 3) >> 2; + sub[4].width = (ihdr->width + 1) >> 1; + sub[4].height = (ihdr->height + 1) >> 2; + sub[5].width = ihdr->width >> 1; + sub[5].height = (ihdr->height + 1) >> 1; + sub[6].width = ihdr->width; + sub[6].height = ihdr->height >> 1; + } + else + { + sub[0].width = ihdr->width; + sub[0].height = ihdr->height; + } + + int i; + for(i=0; i < 7; i++) + { + if(sub[i].width == 0 || sub[i].height == 0) continue; + + int ret = calculate_scanline_width(ctx, sub[i].width, &sub[i].scanline_width); + if(ret) return ret; + + if(sub[ctx->widest_pass].scanline_width < sub[i].scanline_width) ctx->widest_pass = i; + + ctx->last_pass = i; + } + + return 0; +} + +static int calculate_image_size(spng_ctx *ctx, int fmt, size_t *len) +{ + if(ctx == NULL || len == NULL) return SPNG_EINTERNAL; + + struct spng_ihdr *ihdr = &ctx->ihdr; + size_t res = ihdr->width; + unsigned bytes_per_pixel; + + /* Currently all enums are single-bit values */ + if(fmt & ((unsigned)fmt - 1)) return SPNG_EFMT; /* More than one bit is set */ + + if(fmt == SPNG_FMT_RGBA8) + { + bytes_per_pixel = 4; + } + else if(fmt == SPNG_FMT_RGBA16) + { + bytes_per_pixel = 8; + } + else if(fmt == SPNG_FMT_RGB8) + { + bytes_per_pixel = 3; + } + else if(fmt == SPNG_FMT_PNG || fmt == SPNG_FMT_RAW) + { + int ret = calculate_scanline_width(ctx, ihdr->width, &res); + if(ret) return ret; + + res -= 1; /* exclude filter byte */ + bytes_per_pixel = 1; + } + else if(fmt == SPNG_FMT_G8 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth <= 8) + { + bytes_per_pixel = 1; + } + else if(fmt == SPNG_FMT_GA8 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth <= 8) + { + bytes_per_pixel = 2; + } + else if(fmt == SPNG_FMT_GA16 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth == 16) + { + bytes_per_pixel = 4; + } + else return SPNG_EFMT; + + if(res > SIZE_MAX / bytes_per_pixel) return SPNG_EOVERFLOW; + res = res * bytes_per_pixel; + + if(res > SIZE_MAX / ihdr->height) return SPNG_EOVERFLOW; + res = res * ihdr->height; + + *len = res; + + return 0; +} + +static int increase_cache_usage(spng_ctx *ctx, size_t bytes) +{ + if(ctx == NULL || !bytes) return SPNG_EINTERNAL; + + size_t new_usage = ctx->chunk_cache_usage + bytes; + + if(new_usage < ctx->chunk_cache_usage) return SPNG_EOVERFLOW; + + if(new_usage > ctx->chunk_cache_limit) return SPNG_ECHUNK_LIMITS; + + ctx->chunk_cache_usage = new_usage; + + return 0; +} + +static int decrease_cache_usage(spng_ctx *ctx, size_t usage) +{ + if(ctx == NULL || !usage) return SPNG_EINTERNAL; + if(usage > ctx->chunk_cache_usage) return SPNG_EINTERNAL; + + ctx->chunk_cache_usage -= usage; + + return 0; +} + +static int is_critical_chunk(struct spng_chunk *chunk) +{ + if(chunk == NULL) return 0; + if((chunk->type[0] & (1 << 5)) == 0) return 1; + + return 0; +} + +static inline int read_data(spng_ctx *ctx, size_t bytes) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!bytes) return 0; + + if(ctx->streaming && (bytes > SPNG_READ_SIZE)) return SPNG_EINTERNAL; + + int ret = ctx->read_fn(ctx, ctx->read_user_ptr, ctx->stream_buf, bytes); + + if(ret) + { + if(ret > 0 || ret < SPNG_IO_ERROR) ret = SPNG_IO_ERROR; + + return ret; + } + + ctx->bytes_read += bytes; + if(ctx->bytes_read < bytes) return SPNG_EOVERFLOW; + + return 0; +} + +static void *grow_buffer(void *buf, size_t size, size_t *new_size) +{ + if(new_size == NULL) return NULL; + + if(!size) size = SPNG_WRITE_SIZE; + + if(2 > SIZE_MAX / size) return NULL; /* overflow */ + size *= 2; + + void *temp = realloc(buf, size); + if(temp == NULL) return NULL; + + *new_size = size; + + return temp; +} + +/* Ensure there is enough space for encoding starting at ctx->write_ptr */ +static int require_bytes(spng_ctx *ctx, size_t bytes) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + if(ctx->streaming) return 0; /* XXX: use a different flag? */ + + size_t required = ctx->bytes_encoded + bytes; + if(required < bytes) return SPNG_EOVERFLOW; + + if(required > ctx->out_png_size) + { + size_t new_size; + void *temp = grow_buffer(ctx->out_png, ctx->out_png_size, &new_size); + + if(temp == NULL) + { + ctx->state = SPNG_STATE_INVALID; + return SPNG_EMEM; + } + + ctx->out_png = temp; + ctx->out_png_size = new_size; + ctx->write_ptr = ctx->out_png + ctx->bytes_encoded; + } + + return 0; +} + +static int write_data(spng_ctx *ctx, const void *data, size_t len) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + int ret = require_bytes(ctx, len); + if(ret) + { + ctx->state = SPNG_STATE_INVALID; + return ret; + } + + memcpy(ctx->write_ptr, data, len); + + ctx->bytes_encoded += len; + if(ctx->bytes_encoded < len) return SPNG_EOVERFLOW; + + ctx->write_ptr += len; + + return 0; +} + +static int write_header(spng_ctx *ctx, const uint8_t chunk_type[4], uint32_t chunk_length, unsigned char **data) +{ + if(ctx == NULL || chunk_type == NULL) return SPNG_EINTERNAL; + + if(chunk_length > png_u32max) return SPNG_ECHUNK_SIZE; + + size_t total = chunk_length + 12; + + int ret = require_bytes(ctx, total); + if(ret) return ret; + + uint32_t crc = crc32(0, NULL, 0); + ctx->current_chunk.crc = crc32(crc, chunk_type, 4); + + unsigned char header[8]; + + write_u32(header, chunk_length); + memcpy(header + 4, chunk_type, 4); + + ret = write_data(ctx, header, 8); + if(ret) return ret; + + memcpy(&ctx->current_chunk, chunk_type, 4); + ctx->current_chunk.length = chunk_length; + + if(data) + { + ctx->encode_flags.chunk_zerocopy = 1; + + ret = require_bytes(ctx, chunk_length); + if(ret) return ret; + + *data = ctx->write_ptr; + } + + return 0; +} + +static int inline write_crc(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + unsigned char crc[4]; + write_u32(crc, ctx->current_chunk.crc); + + int ret = write_data(ctx, crc, 4); + + return ret; +} + +static int inline finish_chunk(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + if(ctx->encode_flags.chunk_zerocopy) + { + size_t len = ctx->current_chunk.length; + + ctx->bytes_encoded += len; + if(ctx->bytes_encoded < len) return SPNG_EOVERFLOW; + + ctx->current_chunk.crc = crc32(ctx->current_chunk.crc, ctx->write_ptr, ctx->current_chunk.length); + ctx->encode_flags.chunk_zerocopy = 0; + + ctx->write_ptr += len; + } + + return write_crc(ctx); +} + +static int write_chunk(spng_ctx *ctx, const uint8_t type[4], const void *data, size_t length) +{ + if(ctx == NULL || type == NULL) return SPNG_EINTERNAL; + if(length && data == NULL) return SPNG_EINTERNAL; + + unsigned char *write_ptr; + + int ret = write_header(ctx, type, length, &write_ptr); + if(ret) return ret; + + if(length) memcpy(write_ptr, data, length); + + return finish_chunk(ctx); +} + +static int write_iend(spng_ctx *ctx) +{ + unsigned char iend_chunk[12] = { 0, 0, 0, 0, 73, 69, 78, 68, 174, 66, 96, 130 }; + return write_data(ctx, iend_chunk, 12); +} + +/* Read and check the current chunk's crc, + returns -SPNG_CRC_DISCARD if the chunk should be discarded */ +static inline int read_and_check_crc(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + int ret; + ret = read_data(ctx, 4); + if(ret) return ret; + + ctx->current_chunk.crc = read_u32(ctx->data); + + if(ctx->skip_crc) return 0; + + if(ctx->cur_actual_crc != ctx->current_chunk.crc) + { + if(is_critical_chunk(&ctx->current_chunk)) + { + if(ctx->crc_action_critical == SPNG_CRC_USE) return 0; + } + else + { + if(ctx->crc_action_ancillary == SPNG_CRC_USE) return 0; + if(ctx->crc_action_ancillary == SPNG_CRC_DISCARD) return -SPNG_CRC_DISCARD; + } + + return SPNG_ECHUNK_CRC; + } + + return 0; +} + +/* Read and validate the current chunk's crc and the next chunk header */ +static inline int read_header(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + int ret; + struct spng_chunk chunk = { 0 }; + + ret = read_and_check_crc(ctx); + if(ret) + { + if(ret == -SPNG_CRC_DISCARD) + { + ctx->discard = 1; + } + else return ret; + } + + ret = read_data(ctx, 8); + if(ret) return ret; + + chunk.offset = ctx->bytes_read - 8; + + chunk.length = read_u32(ctx->data); + + memcpy(&chunk.type, ctx->data + 4, 4); + + if(chunk.length > png_u32max) return SPNG_ECHUNK_STDLEN; + + ctx->cur_chunk_bytes_left = chunk.length; + + if(is_critical_chunk(&chunk) && ctx->crc_action_critical == SPNG_CRC_USE) ctx->skip_crc = 1; + else if(ctx->crc_action_ancillary == SPNG_CRC_USE) ctx->skip_crc = 1; + else ctx->skip_crc = 0; + + if(!ctx->skip_crc) + { + ctx->cur_actual_crc = crc32(0, NULL, 0); + ctx->cur_actual_crc = crc32(ctx->cur_actual_crc, chunk.type, 4); + } + + ctx->current_chunk = chunk; + + return 0; +} + +/* Read chunk bytes and update crc */ +static int read_chunk_bytes(spng_ctx *ctx, uint32_t bytes) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!ctx->cur_chunk_bytes_left || !bytes) return SPNG_EINTERNAL; + if(bytes > ctx->cur_chunk_bytes_left) return SPNG_EINTERNAL; /* XXX: more specific error? */ + + int ret; + + ret = read_data(ctx, bytes); + if(ret) return ret; + + if(!ctx->skip_crc) ctx->cur_actual_crc = crc32(ctx->cur_actual_crc, ctx->data, bytes); + + ctx->cur_chunk_bytes_left -= bytes; + + return ret; +} + +/* read_chunk_bytes() + read_data() with custom output buffer */ +static int read_chunk_bytes2(spng_ctx *ctx, void *out, uint32_t bytes) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!ctx->cur_chunk_bytes_left || !bytes) return SPNG_EINTERNAL; + if(bytes > ctx->cur_chunk_bytes_left) return SPNG_EINTERNAL; /* XXX: more specific error? */ + + int ret; + uint32_t len = bytes; + + if(ctx->streaming && len > SPNG_READ_SIZE) len = SPNG_READ_SIZE; + + while(bytes) + { + if(len > bytes) len = bytes; + + ret = ctx->read_fn(ctx, ctx->read_user_ptr, out, len); + if(ret) return ret; + + if(!ctx->streaming) memcpy(out, ctx->data, len); + + ctx->bytes_read += len; + if(ctx->bytes_read < len) return SPNG_EOVERFLOW; + + if(!ctx->skip_crc) ctx->cur_actual_crc = crc32(ctx->cur_actual_crc, out, len); + + ctx->cur_chunk_bytes_left -= len; + + out = (char*)out + len; + bytes -= len; + len = SPNG_READ_SIZE; + } + + return 0; +} + +static int discard_chunk_bytes(spng_ctx *ctx, uint32_t bytes) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!bytes) return 0; + + int ret; + + if(ctx->streaming) /* Do small, consecutive reads */ + { + while(bytes) + { + uint32_t len = SPNG_READ_SIZE; + + if(len > bytes) len = bytes; + + ret = read_chunk_bytes(ctx, len); + if(ret) return ret; + + bytes -= len; + } + } + else + { + ret = read_chunk_bytes(ctx, bytes); + if(ret) return ret; + } + + return 0; +} + +static int spng__inflate_init(spng_ctx *ctx) +{ + if(ctx->zstream.state) inflateEnd(&ctx->zstream); + + ctx->inflate = 1; + + ctx->zstream.zalloc = spng__zalloc; + ctx->zstream.zfree = spng__zfree; + ctx->zstream.opaque = ctx; + + if(inflateInit(&ctx->zstream) != Z_OK) return SPNG_EZLIB_INIT; + +#if ZLIB_VERNUM >= 0x1290 && !defined(SPNG_USE_MINIZ) + + int validate = 1; + + if(ctx->flags & SPNG_CTX_IGNORE_ADLER32) validate = 0; + + if(is_critical_chunk(&ctx->current_chunk)) + { + if(ctx->crc_action_critical == SPNG_CRC_USE) validate = 0; + } + else /* ancillary */ + { + if(ctx->crc_action_ancillary == SPNG_CRC_USE) validate = 0; + } + + if(inflateValidate(&ctx->zstream, validate)) return SPNG_EZLIB_INIT; + +#else /* This requires zlib >= 1.2.11 */ + #pragma message ("inflateValidate() not available, SPNG_CTX_IGNORE_ADLER32 will be ignored") +#endif + + return 0; +} + +static int spng__deflate_init(spng_ctx *ctx, struct spng__deflate_options *options) +{ + if(ctx->zstream.state) deflateEnd(&ctx->zstream); + + ctx->deflate = 1; + + z_stream *zstream = &ctx->zstream; + zstream->zalloc = spng__zalloc; + zstream->zfree = spng__zfree; + zstream->opaque = ctx; + zstream->data_type = options->data_type; + + int ret = deflateInit2(zstream, options->compression_level, Z_DEFLATED, options->window_bits, options->mem_level, options->strategy); + + if(ret != Z_OK) return SPNG_EZLIB_INIT; + + return 0; +} + +/* Inflate a zlib stream starting with start_buf if non-NULL, + continuing from the datastream till an end marker, + allocating and writing the inflated stream to *out, + leaving "extra" bytes at the end, final buffer length is *len. + + Takes into account the chunk size and cache limits. +*/ +static int spng__inflate_stream(spng_ctx *ctx, char **out, size_t *len, size_t extra, const void *start_buf, size_t start_len) +{ + int ret = spng__inflate_init(ctx); + if(ret) return ret; + + size_t max = ctx->chunk_cache_limit - ctx->chunk_cache_usage; + + if(ctx->max_chunk_size < max) max = ctx->max_chunk_size; + + if(extra > max) return SPNG_ECHUNK_LIMITS; + max -= extra; + + uint32_t read_size; + size_t size = 8 * 1024; + void *t, *buf = spng__malloc(ctx, size); + + if(buf == NULL) return SPNG_EMEM; + + z_stream *stream = &ctx->zstream; + + if(start_buf != NULL && start_len) + { + stream->avail_in = (uInt)start_len; + stream->next_in = start_buf; + } + else + { + stream->avail_in = 0; + stream->next_in = NULL; + } + + stream->avail_out = (uInt)size; + stream->next_out = buf; + + while(ret != Z_STREAM_END) + { + ret = inflate(stream, 0); + + if(ret == Z_STREAM_END) break; + + if(ret != Z_OK && ret != Z_BUF_ERROR) + { + ret = SPNG_EZLIB; + goto err; + } + + if(!stream->avail_out) /* Resize buffer */ + { + /* overflow or reached chunk/cache limit */ + if( (2 > SIZE_MAX / size) || (size > max / 2) ) + { + ret = SPNG_ECHUNK_LIMITS; + goto err; + } + + size *= 2; + + t = spng__realloc(ctx, buf, size); + if(t == NULL) goto mem; + + buf = t; + + stream->avail_out = (uInt)size / 2; + stream->next_out = (unsigned char*)buf + size / 2; + } + else if(!stream->avail_in) /* Read more chunk bytes */ + { + read_size = ctx->cur_chunk_bytes_left; + if(ctx->streaming && read_size > SPNG_READ_SIZE) read_size = SPNG_READ_SIZE; + + ret = read_chunk_bytes(ctx, read_size); + + if(ret) + { + if(!read_size) ret = SPNG_EZLIB; + + goto err; + } + + stream->avail_in = read_size; + stream->next_in = ctx->data; + } + } + + size = stream->total_out; + + if(!size) + { + ret = SPNG_EZLIB; + goto err; + } + + size += extra; + if(size < extra) goto mem; + + t = spng__realloc(ctx, buf, size); + if(t == NULL) goto mem; + + buf = t; + + (void)increase_cache_usage(ctx, size); + + *out = buf; + *len = size; + + return 0; + +mem: + ret = SPNG_EMEM; +err: + spng__free(ctx, buf); + return ret; +} + +/* Read at least one byte from the IDAT stream */ +static int read_idat_bytes(spng_ctx *ctx, uint32_t *bytes_read) +{ + if(ctx == NULL || bytes_read == NULL) return SPNG_EINTERNAL; + if(memcmp(ctx->current_chunk.type, type_idat, 4)) return SPNG_EIDAT_TOO_SHORT; + + int ret; + uint32_t len; + + while(!ctx->cur_chunk_bytes_left) + { + ret = read_header(ctx); + if(ret) return ret; + + if(memcmp(ctx->current_chunk.type, type_idat, 4)) return SPNG_EIDAT_TOO_SHORT; + } + + if(ctx->streaming) + {/* TODO: estimate bytes to read for progressive reads */ + len = SPNG_READ_SIZE; + if(len > ctx->cur_chunk_bytes_left) len = ctx->cur_chunk_bytes_left; + } + else len = ctx->current_chunk.length; + + ret = read_chunk_bytes(ctx, len); + + *bytes_read = len; + + return ret; +} + +static int read_scanline_bytes(spng_ctx *ctx, unsigned char *dest, size_t len) +{ + if(ctx == NULL || dest == NULL) return SPNG_EINTERNAL; + + int ret = Z_OK; + uint32_t bytes_read; + + z_stream *zstream = &ctx->zstream; + + zstream->avail_out = (uInt)len; + zstream->next_out = dest; + + while(zstream->avail_out != 0) + { + ret = inflate(&ctx->zstream, 0); + + if(ret == Z_OK) continue; + + if(ret == Z_STREAM_END) /* Reached an end-marker */ + { + if(zstream->avail_out != 0) return SPNG_EIDAT_TOO_SHORT; + } + else if(ret == Z_BUF_ERROR) /* Read more IDAT bytes */ + { + ret = read_idat_bytes(ctx, &bytes_read); + if(ret) return ret; + + zstream->avail_in = bytes_read; + zstream->next_in = ctx->data; + } + else return SPNG_EIDAT_STREAM; + } + + return 0; +} + +static uint8_t paeth(uint8_t a, uint8_t b, uint8_t c) +{ + int16_t p = (int16_t)a + (int16_t)b - (int16_t)c; + int16_t pa = abs(p - (int16_t)a); + int16_t pb = abs(p - (int16_t)b); + int16_t pc = abs(p - (int16_t)c); + + if(pa <= pb && pa <= pc) return a; + else if(pb <= pc) return b; + + return c; +} + +SPNG_TARGET_CLONES("default,avx2") +static void defilter_up(size_t bytes, unsigned char *row, const unsigned char *prev) +{ + size_t i; + for(i=0; i < bytes; i++) + { + row[i] += prev[i]; + } +} + +/* Defilter *scanline in-place. + *prev_scanline and *scanline should point to the first pixel, + scanline_width is the width of the scanline including the filter byte. +*/ +static int defilter_scanline(const unsigned char *prev_scanline, unsigned char *scanline, + size_t scanline_width, unsigned bytes_per_pixel, unsigned filter) +{ + if(prev_scanline == NULL || scanline == NULL || !scanline_width) return SPNG_EINTERNAL; + + size_t i; + scanline_width--; + + if(filter == 0) return 0; + +#ifndef SPNG_DISABLE_OPT + if(filter == SPNG_FILTER_UP) goto no_opt; + + if(bytes_per_pixel == 4) + { + if(filter == SPNG_FILTER_SUB) + defilter_sub4(scanline_width, scanline); + else if(filter == SPNG_FILTER_AVERAGE) + defilter_avg4(scanline_width, scanline, prev_scanline); + else if(filter == SPNG_FILTER_PAETH) + defilter_paeth4(scanline_width, scanline, prev_scanline); + else return SPNG_EFILTER; + + return 0; + } + else if(bytes_per_pixel == 3) + { + if(filter == SPNG_FILTER_SUB) + defilter_sub3(scanline_width, scanline); + else if(filter == SPNG_FILTER_AVERAGE) + defilter_avg3(scanline_width, scanline, prev_scanline); + else if(filter == SPNG_FILTER_PAETH) + defilter_paeth3(scanline_width, scanline, prev_scanline); + else return SPNG_EFILTER; + + return 0; + } +no_opt: +#endif + + if(filter == SPNG_FILTER_UP) + { + defilter_up(scanline_width, scanline, prev_scanline); + return 0; + } + + for(i=0; i < scanline_width; i++) + { + uint8_t x, a, b, c; + + if(i >= bytes_per_pixel) + { + a = scanline[i - bytes_per_pixel]; + b = prev_scanline[i]; + c = prev_scanline[i - bytes_per_pixel]; + } + else /* First pixel in row */ + { + a = 0; + b = prev_scanline[i]; + c = 0; + } + + x = scanline[i]; + + switch(filter) + { + case SPNG_FILTER_SUB: + { + x = x + a; + break; + } + case SPNG_FILTER_AVERAGE: + { + uint16_t avg = (a + b) / 2; + x = x + avg; + break; + } + case SPNG_FILTER_PAETH: + { + x = x + paeth(a,b,c); + break; + } + } + + scanline[i] = x; + } + + return 0; +} + +static int filter_scanline(unsigned char *filtered, const unsigned char *prev_scanline, const unsigned char *scanline, + size_t scanline_width, unsigned bytes_per_pixel, const unsigned filter) +{ + if(prev_scanline == NULL || scanline == NULL || scanline_width <= 1) return SPNG_EINTERNAL; + + if(filter > 4) return SPNG_EFILTER; + if(filter == 0) return 0; + + scanline_width--; + + uint32_t i; + for(i=0; i < scanline_width; i++) + { + uint8_t x, a, b, c; + + if(i >= bytes_per_pixel) + { + a = scanline[i - bytes_per_pixel]; + b = prev_scanline[i]; + c = prev_scanline[i - bytes_per_pixel]; + } + else /* first pixel in row */ + { + a = 0; + b = prev_scanline[i]; + c = 0; + } + + x = scanline[i]; + + switch(filter) + { + case SPNG_FILTER_SUB: + { + x = x - a; + break; + } + case SPNG_FILTER_UP: + { + x = x - b; + break; + } + case SPNG_FILTER_AVERAGE: + { + uint16_t avg = (a + b) / 2; + x = x - avg; + break; + } + case SPNG_FILTER_PAETH: + { + x = x - paeth(a,b,c); + break; + } + } + + filtered[i] = x; + } + + return 0; +} + +static int32_t filter_sum(const unsigned char *prev_scanline, const unsigned char *scanline, + size_t size, unsigned bytes_per_pixel, const unsigned filter) +{ + /* prevent potential over/underflow, bails out at a width of ~8M pixels for RGBA8 */ + if(size > (INT32_MAX / 128)) return INT32_MAX; + + uint32_t i; + int32_t sum = 0; + uint8_t x, a, b, c; + + for(i=0; i < size; i++) + { + if(i >= bytes_per_pixel) + { + a = scanline[i - bytes_per_pixel]; + b = prev_scanline[i]; + c = prev_scanline[i - bytes_per_pixel]; + } + else /* first pixel in row */ + { + a = 0; + b = prev_scanline[i]; + c = 0; + } + + x = scanline[i]; + + switch(filter) + { + case SPNG_FILTER_NONE: + { + break; + } + case SPNG_FILTER_SUB: + { + x = x - a; + break; + } + case SPNG_FILTER_UP: + { + x = x - b; + break; + } + case SPNG_FILTER_AVERAGE: + { + uint16_t avg = (a + b) / 2; + x = x - avg; + break; + } + case SPNG_FILTER_PAETH: + { + x = x - paeth(a,b,c); + break; + } + } + + sum += 128 - abs((int)x - 128); + } + + return sum; +} + +static unsigned get_best_filter(const unsigned char *prev_scanline, const unsigned char *scanline, + size_t scanline_width, unsigned bytes_per_pixel, const unsigned choices) +{ + if(!choices) return SPNG_FILTER_NONE; + + scanline_width--; + + int i; + unsigned int best_filter = 0; + enum spng_filter_choice flag; + int32_t sum, best_score = INT32_MAX; + int32_t filter_scores[5] = { INT32_MAX, INT32_MAX, INT32_MAX, INT32_MAX, INT32_MAX }; + + if( !(choices & (choices - 1)) ) + {/* only one choice/bit is set */ + for(i=0; i < 5; i++) + { + if(choices == 1 << (i + 3)) return i; + } + } + + for(i=0; i < 5; i++) + { + flag = 1 << (i + 3); + + if(choices & flag) sum = filter_sum(prev_scanline, scanline, scanline_width, bytes_per_pixel, i); + else continue; + + filter_scores[i] = abs(sum); + + if(filter_scores[i] < best_score) + { + best_score = filter_scores[i]; + best_filter = i; + } + } + + return best_filter; +} + +/* Scale "sbits" significant bits in "sample" from "bit_depth" to "target" + + "bit_depth" must be a valid PNG depth + "sbits" must be less than or equal to "bit_depth" + "target" must be between 1 and 16 +*/ +static uint16_t sample_to_target(uint16_t sample, unsigned bit_depth, unsigned sbits, unsigned target) +{ + if(bit_depth == sbits) + { + if(target == sbits) return sample; /* No scaling */ + }/* bit_depth > sbits */ + else sample = sample >> (bit_depth - sbits); /* Shift significant bits to bottom */ + + /* Downscale */ + if(target < sbits) return sample >> (sbits - target); + + /* Upscale using left bit replication */ + int8_t shift_amount = target - sbits; + uint16_t sample_bits = sample; + sample = 0; + + while(shift_amount >= 0) + { + sample = sample | (sample_bits << shift_amount); + shift_amount -= sbits; + } + + int8_t partial = shift_amount + (int8_t)sbits; + + if(partial != 0) sample = sample | (sample_bits >> abs(shift_amount)); + + return sample; +} + +static inline void gamma_correct_row(unsigned char *row, uint32_t pixels, int fmt, const uint16_t *gamma_lut) +{ + uint32_t i; + + if(fmt == SPNG_FMT_RGBA8) + { + unsigned char *px; + for(i=0; i < pixels; i++) + { + px = row + i * 4; + + px[0] = gamma_lut[px[0]]; + px[1] = gamma_lut[px[1]]; + px[2] = gamma_lut[px[2]]; + } + } + else if(fmt == SPNG_FMT_RGBA16) + { + for(i=0; i < pixels; i++) + { + uint16_t px[4]; + memcpy(px, row + i * 8, 8); + + px[0] = gamma_lut[px[0]]; + px[1] = gamma_lut[px[1]]; + px[2] = gamma_lut[px[2]]; + + memcpy(row + i * 8, px, 8); + } + } + else if(fmt == SPNG_FMT_RGB8) + { + unsigned char *px; + for(i=0; i < pixels; i++) + { + px = row + i * 3; + + px[0] = gamma_lut[px[0]]; + px[1] = gamma_lut[px[1]]; + px[2] = gamma_lut[px[2]]; + } + } +} + +/* Apply transparency to output row */ +static inline void trns_row(unsigned char *row, + const unsigned char *scanline, + const unsigned char *trns, + unsigned scanline_stride, + struct spng_ihdr *ihdr, + uint32_t pixels, + int fmt) +{ + uint32_t i; + unsigned row_stride; + unsigned depth = ihdr->bit_depth; + + if(fmt == SPNG_FMT_RGBA8) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE) return; /* already applied in the decoding loop */ + + row_stride = 4; + for(i=0; i < pixels; i++, scanline+=scanline_stride, row+=row_stride) + { + if(!memcmp(scanline, trns, scanline_stride)) row[3] = 0; + } + } + else if(fmt == SPNG_FMT_RGBA16) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE) return; /* already applied in the decoding loop */ + + row_stride = 8; + for(i=0; i < pixels; i++, scanline+=scanline_stride, row+=row_stride) + { + if(!memcmp(scanline, trns, scanline_stride)) memset(row + 6, 0, 2); + } + } + else if(fmt == SPNG_FMT_GA8) + { + row_stride = 2; + + if(depth == 16) + { + for(i=0; i < pixels; i++, scanline+=scanline_stride, row+=row_stride) + { + if(!memcmp(scanline, trns, scanline_stride)) memset(row + 1, 0, 1); + } + } + else /* depth <= 8 */ + { + struct spng__iter iter = spng__iter_init(depth, scanline); + + for(i=0; i < pixels; i++, row+=row_stride) + { + if(trns[0] == get_sample(&iter)) row[1] = 0; + } + } + } + else if(fmt == SPNG_FMT_GA16) + { + row_stride = 4; + + if(depth == 16) + { + for(i=0; i< pixels; i++, scanline+=scanline_stride, row+=row_stride) + { + if(!memcmp(scanline, trns, 2)) memset(row + 2, 0, 2); + } + } + else + { + struct spng__iter iter = spng__iter_init(depth, scanline); + + for(i=0; i< pixels; i++, row+=row_stride) + { + if(trns[0] == get_sample(&iter)) memset(row + 2, 0, 2); + } + } + } + else return; +} + +static inline void scale_row(unsigned char *row, uint32_t pixels, int fmt, unsigned depth, const struct spng_sbit *sbit) +{ + uint32_t i; + + if(fmt == SPNG_FMT_RGBA8) + { + unsigned char px[4]; + for(i=0; i < pixels; i++) + { + memcpy(px, row + i * 4, 4); + + px[0] = sample_to_target(px[0], depth, sbit->red_bits, 8); + px[1] = sample_to_target(px[1], depth, sbit->green_bits, 8); + px[2] = sample_to_target(px[2], depth, sbit->blue_bits, 8); + px[3] = sample_to_target(px[3], depth, sbit->alpha_bits, 8); + + memcpy(row + i * 4, px, 4); + } + } + else if(fmt == SPNG_FMT_RGBA16) + { + uint16_t px[4]; + for(i=0; i < pixels; i++) + { + memcpy(px, row + i * 8, 8); + + px[0] = sample_to_target(px[0], depth, sbit->red_bits, 16); + px[1] = sample_to_target(px[1], depth, sbit->green_bits, 16); + px[2] = sample_to_target(px[2], depth, sbit->blue_bits, 16); + px[3] = sample_to_target(px[3], depth, sbit->alpha_bits, 16); + + memcpy(row + i * 8, px, 8); + } + } + else if(fmt == SPNG_FMT_RGB8) + { + unsigned char px[4]; + for(i=0; i < pixels; i++) + { + memcpy(px, row + i * 3, 3); + + px[0] = sample_to_target(px[0], depth, sbit->red_bits, 8); + px[1] = sample_to_target(px[1], depth, sbit->green_bits, 8); + px[2] = sample_to_target(px[2], depth, sbit->blue_bits, 8); + + memcpy(row + i * 3, px, 3); + } + } + else if(fmt == SPNG_FMT_G8) + { + for(i=0; i < pixels; i++) + { + row[i] = sample_to_target(row[i], depth, sbit->grayscale_bits, 8); + } + } + else if(fmt == SPNG_FMT_GA8) + { + for(i=0; i < pixels; i++) + { + row[i*2] = sample_to_target(row[i*2], depth, sbit->grayscale_bits, 8); + } + } +} + +/* Expand to *row using 8-bit palette indices from *scanline */ +static void expand_row(unsigned char *row, + const unsigned char *scanline, + const union spng__decode_plte *decode_plte, + uint32_t width, + int fmt) +{ + uint32_t i = 0; + unsigned char *px; + unsigned char entry; + const struct spng_plte_entry *plte = decode_plte->rgba; + +#if defined(SPNG_ARM) + if(fmt == SPNG_FMT_RGBA8) i = expand_palette_rgba8_neon(row, scanline, decode_plte->raw, width); + else if(fmt == SPNG_FMT_RGB8) + { + i = expand_palette_rgb8_neon(row, scanline, decode_plte->raw, width); + + for(; i < width; i++) + {/* In this case the LUT is 3 bytes packed */ + px = row + i * 3; + entry = scanline[i]; + px[0] = decode_plte->raw[entry * 3 + 0]; + px[1] = decode_plte->raw[entry * 3 + 1]; + px[2] = decode_plte->raw[entry * 3 + 2]; + } + return; + } +#endif + + if(fmt == SPNG_FMT_RGBA8) + { + for(; i < width; i++) + { + px = row + i * 4; + entry = scanline[i]; + px[0] = plte[entry].red; + px[1] = plte[entry].green; + px[2] = plte[entry].blue; + px[3] = plte[entry].alpha; + } + } + else if(fmt == SPNG_FMT_RGB8) + { + for(; i < width; i++) + { + px = row + i * 3; + entry = scanline[i]; + px[0] = plte[entry].red; + px[1] = plte[entry].green; + px[2] = plte[entry].blue; + } + } +} + +/* Unpack 1/2/4/8-bit samples to G8/GA8/GA16 or G16 -> GA16 */ +static void unpack_scanline(unsigned char *out, const unsigned char *scanline, uint32_t width, unsigned bit_depth, int fmt) +{ + struct spng__iter iter = spng__iter_init(bit_depth, scanline); + uint32_t i; + uint16_t sample, alpha = 65535; + + + if(fmt == SPNG_FMT_GA8) goto ga8; + else if(fmt == SPNG_FMT_GA16) goto ga16; + + /* 1/2/4-bit -> 8-bit */ + for(i=0; i < width; i++) out[i] = get_sample(&iter); + + return; + +ga8: + /* 1/2/4/8-bit -> GA8 */ + for(i=0; i < width; i++) + { + out[i*2] = get_sample(&iter); + out[i*2 + 1] = 255; + } + + return; + +ga16: + + /* 16 -> GA16 */ + if(bit_depth == 16) + { + for(i=0; i < width; i++) + { + memcpy(out + i * 4, scanline + i * 2, 2); + memcpy(out + i * 4 + 2, &alpha, 2); + } + return; + } + + /* 1/2/4/8-bit -> GA16 */ + for(i=0; i < width; i++) + { + sample = get_sample(&iter); + memcpy(out + i * 4, &sample, 2); + memcpy(out + i * 4 + 2, &alpha, 2); + } +} + +static int check_ihdr(const struct spng_ihdr *ihdr, uint32_t max_width, uint32_t max_height) +{ + if(ihdr->width > png_u32max || !ihdr->width) return SPNG_EWIDTH; + if(ihdr->height > png_u32max || !ihdr->height) return SPNG_EHEIGHT; + + if(ihdr->width > max_width) return SPNG_EUSER_WIDTH; + if(ihdr->height > max_height) return SPNG_EUSER_HEIGHT; + + switch(ihdr->color_type) + { + case SPNG_COLOR_TYPE_GRAYSCALE: + { + if( !(ihdr->bit_depth == 1 || ihdr->bit_depth == 2 || + ihdr->bit_depth == 4 || ihdr->bit_depth == 8 || + ihdr->bit_depth == 16) ) + return SPNG_EBIT_DEPTH; + + break; + } + case SPNG_COLOR_TYPE_TRUECOLOR: + case SPNG_COLOR_TYPE_GRAYSCALE_ALPHA: + case SPNG_COLOR_TYPE_TRUECOLOR_ALPHA: + { + if( !(ihdr->bit_depth == 8 || ihdr->bit_depth == 16) ) + return SPNG_EBIT_DEPTH; + + break; + } + case SPNG_COLOR_TYPE_INDEXED: + { + if( !(ihdr->bit_depth == 1 || ihdr->bit_depth == 2 || + ihdr->bit_depth == 4 || ihdr->bit_depth == 8) ) + return SPNG_EBIT_DEPTH; + + break; + } + default: return SPNG_ECOLOR_TYPE; + } + + if(ihdr->compression_method) return SPNG_ECOMPRESSION_METHOD; + if(ihdr->filter_method) return SPNG_EFILTER_METHOD; + + if(ihdr->interlace_method > 1) return SPNG_EINTERLACE_METHOD; + + return 0; +} + +static int check_plte(const struct spng_plte *plte, const struct spng_ihdr *ihdr) +{ + if(plte == NULL || ihdr == NULL) return 1; + + if(plte->n_entries == 0) return 1; + if(plte->n_entries > 256) return 1; + + if(ihdr->color_type == SPNG_COLOR_TYPE_INDEXED) + { + if(plte->n_entries > (1U << ihdr->bit_depth)) return 1; + } + + return 0; +} + +static int check_sbit(const struct spng_sbit *sbit, const struct spng_ihdr *ihdr) +{ + if(sbit == NULL || ihdr == NULL) return 1; + + if(ihdr->color_type == 0) + { + if(sbit->grayscale_bits == 0) return SPNG_ESBIT; + if(sbit->grayscale_bits > ihdr->bit_depth) return SPNG_ESBIT; + } + else if(ihdr->color_type == 2 || ihdr->color_type == 3) + { + if(sbit->red_bits == 0) return SPNG_ESBIT; + if(sbit->green_bits == 0) return SPNG_ESBIT; + if(sbit->blue_bits == 0) return SPNG_ESBIT; + + uint8_t bit_depth; + if(ihdr->color_type == 3) bit_depth = 8; + else bit_depth = ihdr->bit_depth; + + if(sbit->red_bits > bit_depth) return SPNG_ESBIT; + if(sbit->green_bits > bit_depth) return SPNG_ESBIT; + if(sbit->blue_bits > bit_depth) return SPNG_ESBIT; + } + else if(ihdr->color_type == 4) + { + if(sbit->grayscale_bits == 0) return SPNG_ESBIT; + if(sbit->alpha_bits == 0) return SPNG_ESBIT; + + if(sbit->grayscale_bits > ihdr->bit_depth) return SPNG_ESBIT; + if(sbit->alpha_bits > ihdr->bit_depth) return SPNG_ESBIT; + } + else if(ihdr->color_type == 6) + { + if(sbit->red_bits == 0) return SPNG_ESBIT; + if(sbit->green_bits == 0) return SPNG_ESBIT; + if(sbit->blue_bits == 0) return SPNG_ESBIT; + if(sbit->alpha_bits == 0) return SPNG_ESBIT; + + if(sbit->red_bits > ihdr->bit_depth) return SPNG_ESBIT; + if(sbit->green_bits > ihdr->bit_depth) return SPNG_ESBIT; + if(sbit->blue_bits > ihdr->bit_depth) return SPNG_ESBIT; + if(sbit->alpha_bits > ihdr->bit_depth) return SPNG_ESBIT; + } + + return 0; +} + +static int check_chrm_int(const struct spng_chrm_int *chrm_int) +{ + if(chrm_int == NULL) return 1; + + if(chrm_int->white_point_x > png_u32max || + chrm_int->white_point_y > png_u32max || + chrm_int->red_x > png_u32max || + chrm_int->red_y > png_u32max || + chrm_int->green_x > png_u32max || + chrm_int->green_y > png_u32max || + chrm_int->blue_x > png_u32max || + chrm_int->blue_y > png_u32max) return SPNG_ECHRM; + + return 0; +} + +static int check_phys(const struct spng_phys *phys) +{ + if(phys == NULL) return 1; + + if(phys->unit_specifier > 1) return SPNG_EPHYS; + + if(phys->ppu_x > png_u32max) return SPNG_EPHYS; + if(phys->ppu_y > png_u32max) return SPNG_EPHYS; + + return 0; +} + +static int check_time(const struct spng_time *time) +{ + if(time == NULL) return 1; + + if(time->month == 0 || time->month > 12) return 1; + if(time->day == 0 || time->day > 31) return 1; + if(time->hour > 23) return 1; + if(time->minute > 59) return 1; + if(time->second > 60) return 1; + + return 0; +} + +static int check_offs(const struct spng_offs *offs) +{ + if(offs == NULL) return 1; + + if(offs->unit_specifier > 1) return 1; + + return 0; +} + +static int check_exif(const struct spng_exif *exif) +{ + if(exif == NULL) return 1; + if(exif->data == NULL) return 1; + + if(exif->length < 4) return SPNG_ECHUNK_SIZE; + if(exif->length > png_u32max) return SPNG_ECHUNK_STDLEN; + + const uint8_t exif_le[4] = { 73, 73, 42, 0 }; + const uint8_t exif_be[4] = { 77, 77, 0, 42 }; + + if(memcmp(exif->data, exif_le, 4) && memcmp(exif->data, exif_be, 4)) return 1; + + return 0; +} + +/* Validate PNG keyword */ +static int check_png_keyword(const char *str) +{ + if(str == NULL) return 1; + char len = strlen(str); + const char *end = str + len; + + if(!len) return 1; + if(len > 79) return 1; + if(str[0] == ' ') return 1; /* Leading space */ + if(end[-1] == ' ') return 1; /* Trailing space */ + if(strstr(str, " ") != NULL) return 1; /* Consecutive spaces */ + + uint8_t c; + while(str != end) + { + memcpy(&c, str, 1); + + if( (c >= 32 && c <= 126) || (c >= 161) ) str++; + else return 1; /* Invalid character */ + } + + return 0; +} + +/* Validate PNG text *str up to 'len' bytes */ +static int check_png_text(const char *str, size_t len) +{/* XXX: are consecutive newlines permitted? */ + if(str == NULL || len == 0) return 1; + + uint8_t c; + size_t i = 0; + while(i < len) + { + memcpy(&c, str + i, 1); + + if( (c >= 32 && c <= 126) || (c >= 161) || c == 10) i++; + else return 1; /* Invalid character */ + } + + return 0; +} + +/* Returns non-zero for standard chunks which are stored without allocating memory */ +static int is_small_chunk(uint8_t type[4]) +{ + if(!memcmp(type, type_plte, 4)) return 1; + else if(!memcmp(type, type_chrm, 4)) return 1; + else if(!memcmp(type, type_gama, 4)) return 1; + else if(!memcmp(type, type_sbit, 4)) return 1; + else if(!memcmp(type, type_srgb, 4)) return 1; + else if(!memcmp(type, type_bkgd, 4)) return 1; + else if(!memcmp(type, type_trns, 4)) return 1; + else if(!memcmp(type, type_hist, 4)) return 1; + else if(!memcmp(type, type_phys, 4)) return 1; + else if(!memcmp(type, type_time, 4)) return 1; + else if(!memcmp(type, type_offs, 4)) return 1; + else return 0; +} + +static int read_ihdr(spng_ctx *ctx) +{ + int ret; + struct spng_chunk *chunk = &ctx->current_chunk; + const unsigned char *data; + + chunk->offset = 8; + chunk->length = 13; + size_t sizeof_sig_ihdr = 29; + + ret = read_data(ctx, sizeof_sig_ihdr); + if(ret) return ret; + + data = ctx->data; + + if(memcmp(data, png_signature, sizeof(png_signature))) return SPNG_ESIGNATURE; + + chunk->length = read_u32(data + 8); + memcpy(&chunk->type, data + 12, 4); + + if(chunk->length != 13) return SPNG_EIHDR_SIZE; + if(memcmp(chunk->type, type_ihdr, 4)) return SPNG_ENOIHDR; + + ctx->cur_actual_crc = crc32(0, NULL, 0); + ctx->cur_actual_crc = crc32(ctx->cur_actual_crc, data + 12, 17); + + ctx->ihdr.width = read_u32(data + 16); + ctx->ihdr.height = read_u32(data + 20); + ctx->ihdr.bit_depth = data[24]; + ctx->ihdr.color_type = data[25]; + ctx->ihdr.compression_method = data[26]; + ctx->ihdr.filter_method = data[27]; + ctx->ihdr.interlace_method = data[28]; + + ret = check_ihdr(&ctx->ihdr, ctx->max_width, ctx->max_height); + if(ret) return ret; + + ctx->file.ihdr = 1; + ctx->stored.ihdr = 1; + + ctx->channels = num_channels(&ctx->ihdr); + + if(ctx->ihdr.bit_depth < 8) ctx->bytes_per_pixel = 1; + else ctx->bytes_per_pixel = ctx->channels * (ctx->ihdr.bit_depth / 8); + + ret = calculate_subimages(ctx); + if(ret) return ret; + + return 0; +} + +static void splt_undo(spng_ctx *ctx) +{ + struct spng_splt *splt = &ctx->splt_list[ctx->n_splt - 1]; + + spng__free(ctx, splt->entries); + + decrease_cache_usage(ctx, sizeof(struct spng_splt)); + decrease_cache_usage(ctx, splt->n_entries * sizeof(struct spng_splt_entry)); + + splt->entries = NULL; + + ctx->n_splt--; +} + +static void text_undo(spng_ctx *ctx) +{ + struct spng_text2 *text = &ctx->text_list[ctx->n_text - 1]; + + spng__free(ctx, text->keyword); + if(text->compression_flag) spng__free(ctx, text->text); + + decrease_cache_usage(ctx, text->cache_usage); + decrease_cache_usage(ctx, sizeof(struct spng_text2)); + + text->keyword = NULL; + text->text = NULL; + + ctx->n_text--; +} + +static void chunk_undo(spng_ctx *ctx) +{ + struct spng_unknown_chunk *chunk = &ctx->chunk_list[ctx->n_chunks - 1]; + + spng__free(ctx, chunk->data); + + decrease_cache_usage(ctx, chunk->length); + decrease_cache_usage(ctx, sizeof(struct spng_unknown_chunk)); + + chunk->data = NULL; + + ctx->n_chunks--; +} + +static int read_non_idat_chunks(spng_ctx *ctx) +{ + int ret; + struct spng_chunk chunk; + const unsigned char *data; + + ctx->discard = 0; + ctx->undo = NULL; + ctx->prev_stored = ctx->stored; + + while( !(ret = read_header(ctx))) + { + if(ctx->discard) + { + if(ctx->undo) ctx->undo(ctx); + + ctx->stored = ctx->prev_stored; + } + + ctx->discard = 0; + ctx->undo = NULL; + + ctx->prev_stored = ctx->stored; + chunk = ctx->current_chunk; + + if(!memcmp(chunk.type, type_idat, 4)) + { + if(ctx->state < SPNG_STATE_FIRST_IDAT) + { + if(ctx->ihdr.color_type == 3 && !ctx->stored.plte) return SPNG_ENOPLTE; + + ctx->first_idat = chunk; + return 0; + } + + if(ctx->prev_was_idat) + { + /* Ignore extra IDAT's */ + ret = discard_chunk_bytes(ctx, chunk.length); + if(ret) return ret; + + continue; + } + else return SPNG_ECHUNK_POS; /* IDAT chunk not at the end of the IDAT sequence */ + } + + ctx->prev_was_idat = 0; + + if(is_small_chunk(chunk.type)) + { + /* None of the known chunks can be zero length */ + if(!chunk.length) return SPNG_ECHUNK_SIZE; + + /* The largest of these chunks is PLTE with 256 entries */ + ret = read_chunk_bytes(ctx, chunk.length > 768 ? 768 : chunk.length); + if(ret) return ret; + } + + data = ctx->data; + + if(is_critical_chunk(&chunk)) + { + if(!memcmp(chunk.type, type_plte, 4)) + { + if(ctx->file.trns || ctx->file.hist || ctx->file.bkgd) return SPNG_ECHUNK_POS; + if(chunk.length % 3 != 0) return SPNG_ECHUNK_SIZE; + + ctx->plte.n_entries = chunk.length / 3; + + if(check_plte(&ctx->plte, &ctx->ihdr)) return SPNG_ECHUNK_SIZE; /* XXX: EPLTE? */ + + size_t i; + for(i=0; i < ctx->plte.n_entries; i++) + { + ctx->plte.entries[i].red = data[i * 3]; + ctx->plte.entries[i].green = data[i * 3 + 1]; + ctx->plte.entries[i].blue = data[i * 3 + 2]; + } + + ctx->file.plte = 1; + ctx->stored.plte = 1; + } + else if(!memcmp(chunk.type, type_iend, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) + { + if(chunk.length) return SPNG_ECHUNK_SIZE; + + ret = read_and_check_crc(ctx); + if(ret == -SPNG_CRC_DISCARD) ret = 0; + + return ret; + } + else return SPNG_ECHUNK_POS; + } + else if(!memcmp(chunk.type, type_ihdr, 4)) return SPNG_ECHUNK_POS; + else return SPNG_ECHUNK_UNKNOWN_CRITICAL; + } + else if(!memcmp(chunk.type, type_chrm, 4)) /* Ancillary chunks */ + { + if(ctx->file.plte) return SPNG_ECHUNK_POS; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.chrm) return SPNG_EDUP_CHRM; + + if(chunk.length != 32) return SPNG_ECHUNK_SIZE; + + ctx->chrm_int.white_point_x = read_u32(data); + ctx->chrm_int.white_point_y = read_u32(data + 4); + ctx->chrm_int.red_x = read_u32(data + 8); + ctx->chrm_int.red_y = read_u32(data + 12); + ctx->chrm_int.green_x = read_u32(data + 16); + ctx->chrm_int.green_y = read_u32(data + 20); + ctx->chrm_int.blue_x = read_u32(data + 24); + ctx->chrm_int.blue_y = read_u32(data + 28); + + if(check_chrm_int(&ctx->chrm_int)) return SPNG_ECHRM; + + ctx->file.chrm = 1; + ctx->stored.chrm = 1; + } + else if(!memcmp(chunk.type, type_gama, 4)) + { + if(ctx->file.plte) return SPNG_ECHUNK_POS; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.gama) return SPNG_EDUP_GAMA; + + if(chunk.length != 4) return SPNG_ECHUNK_SIZE; + + ctx->gama = read_u32(data); + + if(!ctx->gama) return SPNG_EGAMA; + if(ctx->gama > png_u32max) return SPNG_EGAMA; + + ctx->file.gama = 1; + ctx->stored.gama = 1; + } + else if(!memcmp(chunk.type, type_sbit, 4)) + { + if(ctx->file.plte) return SPNG_ECHUNK_POS; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.sbit) return SPNG_EDUP_SBIT; + + if(ctx->ihdr.color_type == 0) + { + if(chunk.length != 1) return SPNG_ECHUNK_SIZE; + + ctx->sbit.grayscale_bits = data[0]; + } + else if(ctx->ihdr.color_type == 2 || ctx->ihdr.color_type == 3) + { + if(chunk.length != 3) return SPNG_ECHUNK_SIZE; + + ctx->sbit.red_bits = data[0]; + ctx->sbit.green_bits = data[1]; + ctx->sbit.blue_bits = data[2]; + } + else if(ctx->ihdr.color_type == 4) + { + if(chunk.length != 2) return SPNG_ECHUNK_SIZE; + + ctx->sbit.grayscale_bits = data[0]; + ctx->sbit.alpha_bits = data[1]; + } + else if(ctx->ihdr.color_type == 6) + { + if(chunk.length != 4) return SPNG_ECHUNK_SIZE; + + ctx->sbit.red_bits = data[0]; + ctx->sbit.green_bits = data[1]; + ctx->sbit.blue_bits = data[2]; + ctx->sbit.alpha_bits = data[3]; + } + + if(check_sbit(&ctx->sbit, &ctx->ihdr)) return SPNG_ESBIT; + + ctx->file.sbit = 1; + ctx->stored.sbit = 1; + } + else if(!memcmp(chunk.type, type_srgb, 4)) + { + if(ctx->file.plte) return SPNG_ECHUNK_POS; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.srgb) return SPNG_EDUP_SRGB; + + if(chunk.length != 1) return SPNG_ECHUNK_SIZE; + + ctx->srgb_rendering_intent = data[0]; + + if(ctx->srgb_rendering_intent > 3) return SPNG_ESRGB; + + ctx->file.srgb = 1; + ctx->stored.srgb = 1; + } + else if(!memcmp(chunk.type, type_bkgd, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.bkgd) return SPNG_EDUP_BKGD; + + if(ctx->ihdr.color_type == 0 || ctx->ihdr.color_type == 4) + { + if(chunk.length != 2) return SPNG_ECHUNK_SIZE; + + ctx->bkgd.gray = read_u16(data); + } + else if(ctx->ihdr.color_type == 2 || ctx->ihdr.color_type == 6) + { + if(chunk.length != 6) return SPNG_ECHUNK_SIZE; + + ctx->bkgd.red = read_u16(data); + ctx->bkgd.green = read_u16(data + 2); + ctx->bkgd.blue = read_u16(data + 4); + } + else if(ctx->ihdr.color_type == 3) + { + if(chunk.length != 1) return SPNG_ECHUNK_SIZE; + if(!ctx->file.plte) return SPNG_EBKGD_NO_PLTE; + + ctx->bkgd.plte_index = data[0]; + if(ctx->bkgd.plte_index >= ctx->plte.n_entries) return SPNG_EBKGD_PLTE_IDX; + } + + ctx->file.bkgd = 1; + ctx->stored.bkgd = 1; + } + else if(!memcmp(chunk.type, type_trns, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.trns) return SPNG_EDUP_TRNS; + if(!chunk.length) return SPNG_ECHUNK_SIZE; + + uint16_t mask = ~0; + if(ctx->ihdr.bit_depth < 16) mask = (1 << ctx->ihdr.bit_depth) - 1; + + if(ctx->ihdr.color_type == 0) + { + if(chunk.length != 2) return SPNG_ECHUNK_SIZE; + + ctx->trns.gray = read_u16(data) & mask; + } + else if(ctx->ihdr.color_type == 2) + { + if(chunk.length != 6) return SPNG_ECHUNK_SIZE; + + ctx->trns.red = read_u16(data) & mask; + ctx->trns.green = read_u16(data + 2) & mask; + ctx->trns.blue = read_u16(data + 4) & mask; + } + else if(ctx->ihdr.color_type == 3) + { + if(chunk.length > ctx->plte.n_entries) return SPNG_ECHUNK_SIZE; + if(!ctx->file.plte) return SPNG_ETRNS_NO_PLTE; + + size_t k; + for(k=0; k < chunk.length; k++) + { + ctx->trns.type3_alpha[k] = data[k]; + } + ctx->trns.n_type3_entries = chunk.length; + } + + if(ctx->ihdr.color_type == 4 || ctx->ihdr.color_type == 6) return SPNG_ETRNS_COLOR_TYPE; + + ctx->file.trns = 1; + ctx->stored.trns = 1; + } + else if(!memcmp(chunk.type, type_hist, 4)) + { + if(!ctx->file.plte) return SPNG_EHIST_NO_PLTE; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.hist) return SPNG_EDUP_HIST; + + if( (chunk.length / 2) != (ctx->plte.n_entries) ) return SPNG_ECHUNK_SIZE; + + size_t k; + for(k=0; k < (chunk.length / 2); k++) + { + ctx->hist.frequency[k] = read_u16(data + k*2); + } + + ctx->file.hist = 1; + ctx->stored.hist = 1; + } + else if(!memcmp(chunk.type, type_phys, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.phys) return SPNG_EDUP_PHYS; + + if(chunk.length != 9) return SPNG_ECHUNK_SIZE; + + ctx->phys.ppu_x = read_u32(data); + ctx->phys.ppu_y = read_u32(data + 4); + ctx->phys.unit_specifier = data[8]; + + if(check_phys(&ctx->phys)) return SPNG_EPHYS; + + ctx->file.phys = 1; + ctx->stored.phys = 1; + } + else if(!memcmp(chunk.type, type_time, 4)) + { + if(ctx->file.time) return SPNG_EDUP_TIME; + + if(chunk.length != 7) return SPNG_ECHUNK_SIZE; + + struct spng_time time; + + time.year = read_u16(data); + time.month = data[2]; + time.day = data[3]; + time.hour = data[4]; + time.minute = data[5]; + time.second = data[6]; + + if(check_time(&time)) return SPNG_ETIME; + + ctx->file.time = 1; + + if(!ctx->user.time) ctx->time = time; + + ctx->stored.time = 1; + } + else if(!memcmp(chunk.type, type_offs, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.offs) return SPNG_EDUP_OFFS; + + if(chunk.length != 9) return SPNG_ECHUNK_SIZE; + + ctx->offs.x = read_s32(data); + ctx->offs.y = read_s32(data + 4); + ctx->offs.unit_specifier = data[8]; + + if(check_offs(&ctx->offs)) return SPNG_EOFFS; + + ctx->file.offs = 1; + ctx->stored.offs = 1; + } + else /* Arbitrary-length chunk */ + { + + if(!memcmp(chunk.type, type_exif, 4)) + { + if(ctx->file.exif) return SPNG_EDUP_EXIF; + + ctx->file.exif = 1; + + if(ctx->user.exif) goto discard; + + if(increase_cache_usage(ctx, chunk.length)) return SPNG_ECHUNK_LIMITS; + + struct spng_exif exif; + + exif.length = chunk.length; + + exif.data = spng__malloc(ctx, chunk.length); + if(exif.data == NULL) return SPNG_EMEM; + + ret = read_chunk_bytes2(ctx, exif.data, chunk.length); + if(ret) + { + spng__free(ctx, exif.data); + return ret; + } + + if(check_exif(&exif)) + { + spng__free(ctx, exif.data); + return SPNG_EEXIF; + } + + ctx->exif = exif; + + ctx->stored.exif = 1; + } + else if(!memcmp(chunk.type, type_iccp, 4)) + {/* TODO: add test file with color profile */ + if(ctx->file.plte) return SPNG_ECHUNK_POS; + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->file.iccp) return SPNG_EDUP_ICCP; + if(!chunk.length) return SPNG_ECHUNK_SIZE; + + ctx->file.iccp = 1; + + uint32_t peek_bytes = 81 > chunk.length ? chunk.length : 81; + + ret = read_chunk_bytes(ctx, peek_bytes); + if(ret) return ret; + + unsigned char *keyword_nul = memchr(ctx->data, '\0', peek_bytes); + if(keyword_nul == NULL) return SPNG_EICCP_NAME; + + uint32_t keyword_len = keyword_nul - ctx->data; + + if(keyword_len > 79) return SPNG_EICCP_NAME; + + memcpy(ctx->iccp.profile_name, ctx->data, keyword_len); + + if(check_png_keyword(ctx->iccp.profile_name)) return SPNG_EICCP_NAME; + + if(chunk.length < (keyword_len + 2)) return SPNG_ECHUNK_SIZE; + + if(ctx->data[keyword_len + 1] != 0) return SPNG_EICCP_COMPRESSION_METHOD; + + ret = spng__inflate_stream(ctx, &ctx->iccp.profile, &ctx->iccp.profile_len, 0, ctx->data + keyword_len + 2, peek_bytes - (keyword_len + 2)); + + if(ret) return ret; + + ctx->stored.iccp = 1; + } + else if(!memcmp(chunk.type, type_text, 4) || + !memcmp(chunk.type, type_ztxt, 4) || + !memcmp(chunk.type, type_itxt, 4)) + { + if(!chunk.length) return SPNG_ECHUNK_SIZE; + + ctx->file.text = 1; + + if(ctx->user.text) goto discard; + + if(increase_cache_usage(ctx, sizeof(struct spng_text2))) return SPNG_ECHUNK_LIMITS; + + ctx->n_text++; + if(ctx->n_text < 1) return SPNG_EOVERFLOW; + if(sizeof(struct spng_text2) > SIZE_MAX / ctx->n_text) return SPNG_EOVERFLOW; + + void *buf = spng__realloc(ctx, ctx->text_list, ctx->n_text * sizeof(struct spng_text2)); + if(buf == NULL) return SPNG_EMEM; + ctx->text_list = buf; + + struct spng_text2 *text = &ctx->text_list[ctx->n_text - 1]; + memset(text, 0, sizeof(struct spng_text2)); + + ctx->undo = text_undo; + + uint32_t text_offset = 0, language_tag_offset = 0, translated_keyword_offset = 0; + uint32_t peek_bytes = 256; /* enough for 3 80-byte keywords and some text bytes */ + uint32_t keyword_len; + + if(peek_bytes > chunk.length) peek_bytes = chunk.length; + + ret = read_chunk_bytes(ctx, peek_bytes); + if(ret) return ret; + + data = ctx->data; + + const unsigned char *zlib_stream = NULL; + const unsigned char *peek_end = data + peek_bytes; + const unsigned char *keyword_nul = memchr(data, 0, chunk.length > 80 ? 80 : chunk.length); + + if(keyword_nul == NULL) return SPNG_ETEXT_KEYWORD; + + keyword_len = keyword_nul - data; + + if(!memcmp(chunk.type, type_text, 4)) + { + text->type = SPNG_TEXT; + + text->text_length = chunk.length - keyword_len - 1; + + text_offset = keyword_len; + + /* increment past nul if there is a text field */ + if(text->text_length) text_offset++; + } + else if(!memcmp(chunk.type, type_ztxt, 4)) + { + text->type = SPNG_ZTXT; + + if((peek_bytes - keyword_len) <= 2) return SPNG_EZTXT; + + if(keyword_nul[1]) return SPNG_EZTXT_COMPRESSION_METHOD; + + text->compression_flag = 1; + + text_offset = keyword_len + 2; + } + else if(!memcmp(chunk.type, type_itxt, 4)) + { + text->type = SPNG_ITXT; + + /* at least two 1-byte fields, two >=0 length strings, and one byte of (compressed) text */ + if((peek_bytes - keyword_len) < 5) return SPNG_EITXT; + + text->compression_flag = keyword_nul[1]; + + if(text->compression_flag > 1) return SPNG_EITXT_COMPRESSION_FLAG; + + if(keyword_nul[2]) return SPNG_EITXT_COMPRESSION_METHOD; + + language_tag_offset = keyword_len + 3; + + const unsigned char *term; + term = memchr(data + language_tag_offset, 0, peek_bytes - language_tag_offset); + if(term == NULL) return SPNG_EITXT_LANG_TAG; + + if((peek_end - term) < 2) return SPNG_EITXT; + + translated_keyword_offset = term - data + 1; + + const unsigned char *zlib_stream = memchr(data + translated_keyword_offset, 0, peek_bytes - translated_keyword_offset); + if(zlib_stream == NULL) return SPNG_EITXT; + if(zlib_stream == peek_end) return SPNG_EITXT; + + text_offset = zlib_stream - data + 1; + text->text_length = chunk.length - text_offset; + } + else return SPNG_EINTERNAL; + + + if(text->compression_flag) + { + /* cache usage = peek_bytes + decompressed text size + nul */ + if(increase_cache_usage(ctx, peek_bytes)) return SPNG_ECHUNK_LIMITS; + + text->keyword = spng__calloc(ctx, 1, peek_bytes); + if(text->keyword == NULL) return SPNG_EMEM; + + memcpy(text->keyword, data, peek_bytes); + + zlib_stream = ctx->data + text_offset; + + ret = spng__inflate_stream(ctx, &text->text, &text->text_length, 1, zlib_stream, peek_bytes - text_offset); + + if(ret) return ret; + + text->text[text->text_length - 1] = '\0'; + text->cache_usage = text->text_length + peek_bytes; + } + else + { + if(increase_cache_usage(ctx, chunk.length + 1)) return SPNG_ECHUNK_LIMITS; + + text->keyword = spng__malloc(ctx, chunk.length + 1); + if(text->keyword == NULL) return SPNG_EMEM; + + memcpy(text->keyword, data, peek_bytes); + + if(chunk.length > peek_bytes) + { + ret = read_chunk_bytes2(ctx, text->keyword + peek_bytes, chunk.length - peek_bytes); + if(ret) return ret; + } + + text->text = text->keyword + text_offset; + + text->text_length = chunk.length - text_offset; + + text->text[text->text_length] = '\0'; + text->cache_usage = chunk.length + 1; + } + + if(check_png_keyword(text->keyword)) return SPNG_ETEXT_KEYWORD; + + text->text_length = strlen(text->text); + + if(text->type != SPNG_ITXT) + { + language_tag_offset = keyword_len; + translated_keyword_offset = keyword_len; + + if(ctx->strict && check_png_text(text->text, text->text_length)) + { + if(text->type == SPNG_ZTXT) return SPNG_EZTXT; + else return SPNG_ETEXT; + } + } + + text->language_tag = text->keyword + language_tag_offset; + text->translated_keyword = text->keyword + translated_keyword_offset; + + ctx->stored.text = 1; + } + else if(!memcmp(chunk.type, type_splt, 4)) + { + if(ctx->state == SPNG_STATE_AFTER_IDAT) return SPNG_ECHUNK_POS; + if(ctx->user.splt) goto discard; /* XXX: could check profile names for uniqueness */ + if(!chunk.length) return SPNG_ECHUNK_SIZE; + + ctx->file.splt = 1; + + /* chunk.length + sizeof(struct spng_splt) + splt->n_entries * sizeof(struct spng_splt_entry) */ + if(increase_cache_usage(ctx, chunk.length + sizeof(struct spng_splt))) return SPNG_ECHUNK_LIMITS; + + ctx->n_splt++; + if(ctx->n_splt < 1) return SPNG_EOVERFLOW; + if(sizeof(struct spng_splt) > SIZE_MAX / ctx->n_splt) return SPNG_EOVERFLOW; + + void *buf = spng__realloc(ctx, ctx->splt_list, ctx->n_splt * sizeof(struct spng_splt)); + if(buf == NULL) return SPNG_EMEM; + ctx->splt_list = buf; + + struct spng_splt *splt = &ctx->splt_list[ctx->n_splt - 1]; + + memset(splt, 0, sizeof(struct spng_splt)); + + ctx->undo = splt_undo; + + void *t = spng__malloc(ctx, chunk.length); + if(t == NULL) return SPNG_EMEM; + + splt->entries = t; /* simplifies error handling */ + data = t; + + ret = read_chunk_bytes2(ctx, t, chunk.length); + if(ret) return ret; + + uint32_t keyword_len = chunk.length < 80 ? chunk.length : 80; + + const unsigned char *keyword_nul = memchr(data, 0, keyword_len); + if(keyword_nul == NULL) return SPNG_ESPLT_NAME; + + keyword_len = keyword_nul - data; + + memcpy(splt->name, data, keyword_len); + + if(check_png_keyword(splt->name)) return SPNG_ESPLT_NAME; + + uint32_t j; + for(j=0; j < (ctx->n_splt - 1); j++) + { + if(!strcmp(ctx->splt_list[j].name, splt->name)) return SPNG_ESPLT_DUP_NAME; + } + + if( (chunk.length - keyword_len) <= 2) return SPNG_ECHUNK_SIZE; + + splt->sample_depth = data[keyword_len + 1]; + + uint32_t entries_len = chunk.length - keyword_len - 2; + if(!entries_len) return SPNG_ECHUNK_SIZE; + + if(splt->sample_depth == 16) + { + if(entries_len % 10 != 0) return SPNG_ECHUNK_SIZE; + splt->n_entries = entries_len / 10; + } + else if(splt->sample_depth == 8) + { + if(entries_len % 6 != 0) return SPNG_ECHUNK_SIZE; + splt->n_entries = entries_len / 6; + } + else return SPNG_ESPLT_DEPTH; + + if(!splt->n_entries) return SPNG_ECHUNK_SIZE; + + size_t list_size = splt->n_entries; + + if(list_size > SIZE_MAX / sizeof(struct spng_splt_entry)) return SPNG_EOVERFLOW; + + list_size *= sizeof(struct spng_splt_entry); + + if(increase_cache_usage(ctx, list_size)) return SPNG_ECHUNK_LIMITS; + + splt->entries = spng__malloc(ctx, list_size); + if(splt->entries == NULL) + { + spng__free(ctx, t); + return SPNG_EMEM; + } + + data = (unsigned char*)t + keyword_len + 2; + + uint32_t k; + if(splt->sample_depth == 16) + { + for(k=0; k < splt->n_entries; k++) + { + splt->entries[k].red = read_u16(data + k * 10); + splt->entries[k].green = read_u16(data + k * 10 + 2); + splt->entries[k].blue = read_u16(data + k * 10 + 4); + splt->entries[k].alpha = read_u16(data + k * 10 + 6); + splt->entries[k].frequency = read_u16(data + k * 10 + 8); + } + } + else if(splt->sample_depth == 8) + { + for(k=0; k < splt->n_entries; k++) + { + splt->entries[k].red = data[k * 6]; + splt->entries[k].green = data[k * 6 + 1]; + splt->entries[k].blue = data[k * 6 + 2]; + splt->entries[k].alpha = data[k * 6 + 3]; + splt->entries[k].frequency = read_u16(data + k * 6 + 4); + } + } + + spng__free(ctx, t); + decrease_cache_usage(ctx, chunk.length); + + ctx->stored.splt = 1; + } + else /* Unknown chunk */ + { + ctx->file.unknown = 1; + + if(!ctx->keep_unknown) goto discard; + if(ctx->user.unknown) goto discard; + + if(increase_cache_usage(ctx, chunk.length + sizeof(struct spng_unknown_chunk))) return SPNG_ECHUNK_LIMITS; + + ctx->n_chunks++; + if(ctx->n_chunks < 1) return SPNG_EOVERFLOW; + if(sizeof(struct spng_unknown_chunk) > SIZE_MAX / ctx->n_chunks) return SPNG_EOVERFLOW; + + void *buf = spng__realloc(ctx, ctx->chunk_list, ctx->n_chunks * sizeof(struct spng_unknown_chunk)); + if(buf == NULL) return SPNG_EMEM; + ctx->chunk_list = buf; + + struct spng_unknown_chunk *chunkp = &ctx->chunk_list[ctx->n_chunks - 1]; + + memset(chunkp, 0, sizeof(struct spng_unknown_chunk)); + + ctx->undo = chunk_undo; + + memcpy(chunkp->type, chunk.type, 4); + + if(chunk.length > 0) + { + void *t = spng__malloc(ctx, chunk.length); + if(t == NULL) return SPNG_EMEM; + + ret = read_chunk_bytes2(ctx, t, chunk.length); + if(ret) + { + spng__free(ctx, t); + return ret; + } + + chunkp->length = chunk.length; + chunkp->data = t; + + if(ctx->state < SPNG_STATE_FIRST_IDAT) + { + if(ctx->file.plte) chunkp->location = SPNG_AFTER_PLTE; + else chunkp->location = SPNG_AFTER_IHDR; + } + else if(ctx->state >= SPNG_STATE_AFTER_IDAT) chunkp->location = SPNG_AFTER_IDAT; + } + + ctx->stored.unknown = 1; + } + +discard: + ret = discard_chunk_bytes(ctx, ctx->cur_chunk_bytes_left); + if(ret) return ret; + } + + } + + return ret; +} + +static int decode_err(spng_ctx *ctx, int err) +{ + ctx->state = SPNG_STATE_INVALID; + + return err; +} + +static int encode_err(spng_ctx *ctx, int err) +{ + ctx->state = SPNG_STATE_INVALID; + + return err; +} + +/* Read chunks before or after the IDAT chunks depending on state */ +static int read_chunks(spng_ctx *ctx, int only_ihdr) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!ctx->state) return SPNG_EBADSTATE; + if(ctx->data == NULL) + { + if(ctx->encode_only) return 0; + else return SPNG_EINTERNAL; + } + + int ret = 0; + + if(ctx->state == SPNG_STATE_INPUT) + { + ret = read_ihdr(ctx); + + if(ret) return decode_err(ctx, ret); + + ctx->state = SPNG_STATE_IHDR; + } + + if(only_ihdr) return 0; + + if(ctx->state == SPNG_STATE_EOI) + { + ctx->state = SPNG_STATE_AFTER_IDAT; + ctx->prev_was_idat = 1; + } + + while(ctx->state < SPNG_STATE_FIRST_IDAT || ctx->state == SPNG_STATE_AFTER_IDAT) + { + ret = read_non_idat_chunks(ctx); + + if(!ret) + { + if(ctx->state < SPNG_STATE_FIRST_IDAT) ctx->state = SPNG_STATE_FIRST_IDAT; + else if(ctx->state == SPNG_STATE_AFTER_IDAT) ctx->state = SPNG_STATE_IEND; + } + else + { + switch(ret) + { + case SPNG_ECHUNK_POS: + case SPNG_ECHUNK_SIZE: /* size != expected size, SPNG_ECHUNK_STDLEN = invalid size */ + case SPNG_EDUP_PLTE: + case SPNG_EDUP_CHRM: + case SPNG_EDUP_GAMA: + case SPNG_EDUP_ICCP: + case SPNG_EDUP_SBIT: + case SPNG_EDUP_SRGB: + case SPNG_EDUP_BKGD: + case SPNG_EDUP_HIST: + case SPNG_EDUP_TRNS: + case SPNG_EDUP_PHYS: + case SPNG_EDUP_TIME: + case SPNG_EDUP_OFFS: + case SPNG_EDUP_EXIF: + case SPNG_ECHRM: + case SPNG_ETRNS_COLOR_TYPE: + case SPNG_ETRNS_NO_PLTE: + case SPNG_EGAMA: + case SPNG_EICCP_NAME: + case SPNG_EICCP_COMPRESSION_METHOD: + case SPNG_ESBIT: + case SPNG_ESRGB: + case SPNG_ETEXT: + case SPNG_ETEXT_KEYWORD: + case SPNG_EZTXT: + case SPNG_EZTXT_COMPRESSION_METHOD: + case SPNG_EITXT: + case SPNG_EITXT_COMPRESSION_FLAG: + case SPNG_EITXT_COMPRESSION_METHOD: + case SPNG_EITXT_LANG_TAG: + case SPNG_EITXT_TRANSLATED_KEY: + case SPNG_EBKGD_NO_PLTE: + case SPNG_EBKGD_PLTE_IDX: + case SPNG_EHIST_NO_PLTE: + case SPNG_EPHYS: + case SPNG_ESPLT_NAME: + case SPNG_ESPLT_DUP_NAME: + case SPNG_ESPLT_DEPTH: + case SPNG_ETIME: + case SPNG_EOFFS: + case SPNG_EEXIF: + case SPNG_EZLIB: + { + if(!ctx->strict && !is_critical_chunk(&ctx->current_chunk)) + { + ret = discard_chunk_bytes(ctx, ctx->cur_chunk_bytes_left); + if(ret) return decode_err(ctx, ret); + + if(ctx->undo) ctx->undo(ctx); + + ctx->stored = ctx->prev_stored; + + ctx->discard = 0; + ctx->undo = NULL; + + continue; + } + else return decode_err(ctx, ret); + + break; + } + default: return decode_err(ctx, ret); + } + } + } + + return ret; +} + +static int read_scanline(spng_ctx *ctx) +{ + int ret, pass = ctx->row_info.pass; + struct spng_row_info *ri = &ctx->row_info; + const struct spng_subimage *sub = ctx->subimage; + size_t scanline_width = sub[pass].scanline_width; + uint32_t scanline_idx = ri->scanline_idx; + + uint8_t next_filter = 0; + + if(scanline_idx == (sub[pass].height - 1) && ri->pass == ctx->last_pass) + { + ret = read_scanline_bytes(ctx, ctx->scanline, scanline_width - 1); + } + else + { + ret = read_scanline_bytes(ctx, ctx->scanline, scanline_width); + if(ret) return ret; + + next_filter = ctx->scanline[scanline_width - 1]; + if(next_filter > 4) ret = SPNG_EFILTER; + } + + if(ret) return ret; + + if(!scanline_idx && ri->filter > 1) + { + /* prev_scanline is all zeros for the first scanline */ + memset(ctx->prev_scanline, 0, scanline_width); + } + + if(ctx->ihdr.bit_depth == 16 && ctx->fmt != SPNG_FMT_RAW) u16_row_to_host(ctx->scanline, scanline_width - 1); + + ret = defilter_scanline(ctx->prev_scanline, ctx->scanline, scanline_width, ctx->bytes_per_pixel, ri->filter); + if(ret) return ret; + + ri->filter = next_filter; + + return 0; +} + +static int update_row_info(spng_ctx *ctx) +{ + int interlacing = ctx->ihdr.interlace_method; + struct spng_row_info *ri = &ctx->row_info; + const struct spng_subimage *sub = ctx->subimage; + + if(ri->scanline_idx == (sub[ri->pass].height - 1)) /* Last scanline */ + { + if(ri->pass == ctx->last_pass) + { + ctx->state = SPNG_STATE_EOI; + + return SPNG_EOI; + } + + ri->scanline_idx = 0; + ri->pass++; + + /* Skip empty passes */ + while( (!sub[ri->pass].width || !sub[ri->pass].height) && (ri->pass < ctx->last_pass)) ri->pass++; + } + else + { + ri->row_num++; + ri->scanline_idx++; + } + + if(interlacing) ri->row_num = adam7_y_start[ri->pass] + ri->scanline_idx * adam7_y_delta[ri->pass]; + + return 0; +} + +int spng_decode_scanline(spng_ctx *ctx, void *out, size_t len) +{ + if(ctx == NULL || out == NULL) return 1; + + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + + struct decode_flags f = ctx->decode_flags; + + struct spng_row_info *ri = &ctx->row_info; + const struct spng_subimage *sub = ctx->subimage; + + const struct spng_ihdr *ihdr = &ctx->ihdr; + const uint16_t *gamma_lut = ctx->gamma_lut; + unsigned char *trns_px = ctx->trns_px; + const struct spng_sbit *sb = &ctx->decode_sb; + const struct spng_plte_entry *plte = ctx->decode_plte.rgba; + struct spng__iter iter = spng__iter_init(ihdr->bit_depth, ctx->scanline); + + const unsigned char *scanline; + + const int pass = ri->pass; + const int fmt = ctx->fmt; + const size_t scanline_width = sub[pass].scanline_width; + const uint32_t width = sub[pass].width; + uint32_t k; + uint8_t r_8, g_8, b_8, a_8, gray_8; + uint16_t r_16, g_16, b_16, a_16, gray_16; + r_8=0; g_8=0; b_8=0; a_8=0; gray_8=0; + r_16=0; g_16=0; b_16=0; a_16=0; gray_16=0; + size_t pixel_size = 4; /* SPNG_FMT_RGBA8 */ + size_t pixel_offset = 0; + unsigned char *pixel; + unsigned processing_depth = ihdr->bit_depth; + + if(f.indexed) processing_depth = 8; + + if(fmt == SPNG_FMT_RGBA16) pixel_size = 8; + else if(fmt == SPNG_FMT_RGB8) pixel_size = 3; + + if(len < sub[pass].out_width) return SPNG_EBUFSIZ; + + int ret = read_scanline(ctx); + + if(ret) return decode_err(ctx, ret); + + scanline = ctx->scanline; + + for(k=0; k < width; k++) + { + pixel = (unsigned char*)out + pixel_offset; + pixel_offset += pixel_size; + + if(f.same_layout) + { + if(f.zerocopy) break; + + memcpy(out, scanline, scanline_width - 1); + break; + } + + if(f.unpack) + { + unpack_scanline(out, scanline, width, ihdr->bit_depth, fmt); + break; + } + + if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR) + { + if(ihdr->bit_depth == 16) + { + memcpy(&r_16, scanline + (k * 6), 2); + memcpy(&g_16, scanline + (k * 6) + 2, 2); + memcpy(&b_16, scanline + (k * 6) + 4, 2); + + a_16 = 65535; + } + else /* == 8 */ + { + if(fmt == SPNG_FMT_RGBA8) + { + rgb8_row_to_rgba8(scanline, out, width); + break; + } + + r_8 = scanline[k * 3]; + g_8 = scanline[k * 3 + 1]; + b_8 = scanline[k * 3 + 2]; + + a_8 = 255; + } + } + else if(ihdr->color_type == SPNG_COLOR_TYPE_INDEXED) + { + uint8_t entry = 0; + + if(ihdr->bit_depth == 8) + { + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGB8)) + { + expand_row(out, scanline, &ctx->decode_plte, width, fmt); + break; + } + + entry = scanline[k]; + } + else /* < 8 */ + { + entry = get_sample(&iter); + } + + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGB8)) + { + pixel[0] = plte[entry].red; + pixel[1] = plte[entry].green; + pixel[2] = plte[entry].blue; + if(fmt == SPNG_FMT_RGBA8) pixel[3] = plte[entry].alpha; + + continue; + } + else /* RGBA16 */ + { + r_16 = plte[entry].red; + g_16 = plte[entry].green; + b_16 = plte[entry].blue; + a_16 = plte[entry].alpha; + + r_16 = (r_16 << 8) | r_16; + g_16 = (g_16 << 8) | g_16; + b_16 = (b_16 << 8) | b_16; + a_16 = (a_16 << 8) | a_16; + + memcpy(pixel, &r_16, 2); + memcpy(pixel + 2, &g_16, 2); + memcpy(pixel + 4, &b_16, 2); + memcpy(pixel + 6, &a_16, 2); + + continue; + } + } + else if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA) + { + if(ihdr->bit_depth == 16) + { + memcpy(&r_16, scanline + (k * 8), 2); + memcpy(&g_16, scanline + (k * 8) + 2, 2); + memcpy(&b_16, scanline + (k * 8) + 4, 2); + memcpy(&a_16, scanline + (k * 8) + 6, 2); + } + else /* == 8 */ + { + r_8 = scanline[k * 4]; + g_8 = scanline[k * 4 + 1]; + b_8 = scanline[k * 4 + 2]; + a_8 = scanline[k * 4 + 3]; + } + } + else if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE) + { + if(ihdr->bit_depth == 16) + { + memcpy(&gray_16, scanline + k * 2, 2); + + if(f.apply_trns && ctx->trns.gray == gray_16) a_16 = 0; + else a_16 = 65535; + + r_16 = gray_16; + g_16 = gray_16; + b_16 = gray_16; + } + else /* <= 8 */ + { + gray_8 = get_sample(&iter); + + if(f.apply_trns && ctx->trns.gray == gray_8) a_8 = 0; + else a_8 = 255; + + r_8 = gray_8; g_8 = gray_8; b_8 = gray_8; + } + } + else if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA) + { + if(ihdr->bit_depth == 16) + { + memcpy(&gray_16, scanline + (k * 4), 2); + memcpy(&a_16, scanline + (k * 4) + 2, 2); + + r_16 = gray_16; + g_16 = gray_16; + b_16 = gray_16; + } + else /* == 8 */ + { + gray_8 = scanline[k * 2]; + a_8 = scanline[k * 2 + 1]; + + r_8 = gray_8; + g_8 = gray_8; + b_8 = gray_8; + } + } + + + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGB8)) + { + if(ihdr->bit_depth == 16) + { + r_8 = r_16 >> 8; + g_8 = g_16 >> 8; + b_8 = b_16 >> 8; + a_8 = a_16 >> 8; + } + + pixel[0] = r_8; + pixel[1] = g_8; + pixel[2] = b_8; + + if(fmt == SPNG_FMT_RGBA8) pixel[3] = a_8; + } + else if(fmt == SPNG_FMT_RGBA16) + { + if(ihdr->bit_depth != 16) + { + r_16 = r_8; + g_16 = g_8; + b_16 = b_8; + a_16 = a_8; + } + + memcpy(pixel, &r_16, 2); + memcpy(pixel + 2, &g_16, 2); + memcpy(pixel + 4, &b_16, 2); + memcpy(pixel + 6, &a_16, 2); + } + }/* for(k=0; k < width; k++) */ + + if(f.apply_trns) trns_row(out, scanline, trns_px, ctx->bytes_per_pixel, &ctx->ihdr, width, fmt); + + if(f.do_scaling) scale_row(out, width, fmt, processing_depth, sb); + + if(f.apply_gamma) gamma_correct_row(out, width, fmt, gamma_lut); + + /* The previous scanline is always defiltered */ + void *t = ctx->prev_scanline; + ctx->prev_scanline = ctx->scanline; + ctx->scanline = t; + + ret = update_row_info(ctx); + + if(ret == SPNG_EOI) + { + if(ctx->cur_chunk_bytes_left) /* zlib stream ended before an IDAT chunk boundary */ + {/* Discard the rest of the chunk */ + int ret = discard_chunk_bytes(ctx, ctx->cur_chunk_bytes_left); + if(ret) return decode_err(ctx, ret); + } + + ctx->last_idat = ctx->current_chunk; + } + + return ret; +} + +int spng_decode_row(spng_ctx *ctx, void *out, size_t len) +{ + if(ctx == NULL || out == NULL) return 1; + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + if(len < ctx->out_width) return SPNG_EBUFSIZ; + + const struct spng_ihdr *ihdr = &ctx->ihdr; + int ret, pass = ctx->row_info.pass; + unsigned char *outptr = out; + + if(!ihdr->interlace_method || pass == 6) return spng_decode_scanline(ctx, out, len); + + ret = spng_decode_scanline(ctx, ctx->row, ctx->out_width); + if(ret && ret != SPNG_EOI) return ret; + + uint32_t k; + unsigned pixel_size = 4; /* RGBA8 */ + if(ctx->fmt == SPNG_FMT_RGBA16) pixel_size = 8; + else if(ctx->fmt == SPNG_FMT_RGB8) pixel_size = 3; + else if(ctx->fmt == SPNG_FMT_G8) pixel_size = 1; + else if(ctx->fmt == SPNG_FMT_GA8) pixel_size = 2; + else if(ctx->fmt & (SPNG_FMT_PNG | SPNG_FMT_RAW)) + { + if(ihdr->bit_depth < 8) + { + struct spng__iter iter = spng__iter_init(ihdr->bit_depth, ctx->row); + const uint8_t samples_per_byte = 8 / ihdr->bit_depth; + uint8_t sample; + + for(k=0; k < ctx->subimage[pass].width; k++) + { + sample = get_sample(&iter); + + size_t ioffset = adam7_x_start[pass] + k * adam7_x_delta[pass]; + + sample = sample << (iter.initial_shift - ioffset * ihdr->bit_depth % 8); + + ioffset /= samples_per_byte; + + outptr[ioffset] |= sample; + } + + return 0; + } + else pixel_size = ctx->bytes_per_pixel; + } + + for(k=0; k < ctx->subimage[pass].width; k++) + { + size_t ioffset = (adam7_x_start[pass] + (size_t) k * adam7_x_delta[pass]) * pixel_size; + + memcpy(outptr + ioffset, ctx->row + k * pixel_size, pixel_size); + } + + return 0; +} + +int spng_decode_image(spng_ctx *ctx, void *out, size_t len, int fmt, int flags) +{ + if(ctx == NULL) return 1; + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + + int ret = spng_decoded_image_size(ctx, fmt, &ctx->total_out_size); + if(ret) return decode_err(ctx, ret); + + ret = read_chunks(ctx, 0); + if(ret) return ret; + + if( !(flags & SPNG_DECODE_PROGRESSIVE) ) + { + if(out == NULL) return 1; + if(len < ctx->total_out_size) return SPNG_EBUFSIZ; + } + + struct spng_ihdr *ihdr = &ctx->ihdr; + + ctx->out_width = ctx->total_out_size / ihdr->height; + + ret = spng__inflate_init(ctx); + if(ret) return decode_err(ctx, ret); + + ctx->zstream.avail_in = 0; + ctx->zstream.next_in = ctx->data; + + size_t scanline_buf_size = ctx->subimage[ctx->widest_pass].scanline_width; + + scanline_buf_size += 32; + + if(scanline_buf_size < 32) return SPNG_EOVERFLOW; + + ctx->scanline_buf = spng__malloc(ctx, scanline_buf_size); + ctx->prev_scanline_buf = spng__malloc(ctx, scanline_buf_size); + + ctx->scanline = ctx->scanline_buf; + ctx->prev_scanline = ctx->prev_scanline_buf; + + struct decode_flags f = {0}; + + ctx->fmt = fmt; + + if(ihdr->color_type == SPNG_COLOR_TYPE_INDEXED) f.indexed = 1; + + unsigned processing_depth = ihdr->bit_depth; + + if(f.indexed) processing_depth = 8; + + if(ihdr->interlace_method) + { + f.interlaced = 1; + ctx->row_buf = spng__malloc(ctx, ctx->out_width); + ctx->row = ctx->row_buf; + + if(ctx->row == NULL) return decode_err(ctx, SPNG_EMEM); + } + + if(ctx->scanline == NULL || ctx->prev_scanline == NULL) + { + return decode_err(ctx, SPNG_EMEM); + } + + f.do_scaling = 1; + if(f.indexed) f.do_scaling = 0; + + unsigned depth_target = 8; /* FMT_RGBA8, G8 */ + if(fmt == SPNG_FMT_RGBA16) depth_target = 16; + + if(flags & SPNG_DECODE_TRNS && ctx->stored.trns) f.apply_trns = 1; + else flags &= ~SPNG_DECODE_TRNS; + + if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA || + ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA) flags &= ~SPNG_DECODE_TRNS; + + if(flags & SPNG_DECODE_GAMMA && ctx->stored.gama) f.apply_gamma = 1; + else flags &= ~SPNG_DECODE_GAMMA; + + if(flags & SPNG_DECODE_USE_SBIT && ctx->stored.sbit) f.use_sbit = 1; + else flags &= ~SPNG_DECODE_USE_SBIT; + + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGBA16)) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR_ALPHA && + ihdr->bit_depth == depth_target) f.same_layout = 1; + } + else if(fmt == SPNG_FMT_RGB8) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR && + ihdr->bit_depth == depth_target) f.same_layout = 1; + + f.apply_trns = 0; /* not applicable */ + } + else if(fmt & (SPNG_FMT_PNG | SPNG_FMT_RAW)) + { + f.same_layout = 1; + f.do_scaling = 0; + f.apply_gamma = 0; /* for now */ + f.apply_trns = 0; + } + else if(fmt == SPNG_FMT_G8 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth <= 8) + { + if(ihdr->bit_depth == depth_target) f.same_layout = 1; + else if(ihdr->bit_depth < 8) f.unpack = 1; + + f.apply_trns = 0; + } + else if(fmt == SPNG_FMT_GA8 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth <= 8) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA && + ihdr->bit_depth == depth_target) f.same_layout = 1; + else if(ihdr->bit_depth <= 8) f.unpack = 1; + } + else if(fmt == SPNG_FMT_GA16 && ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr->bit_depth == 16) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE_ALPHA && + ihdr->bit_depth == depth_target) f.same_layout = 1; + else if(ihdr->bit_depth == 16) f.unpack = 1; + } + + /*if(f.same_layout && !flags && !f.interlaced) f.zerocopy = 1;*/ + + uint16_t *gamma_lut = NULL; + + if(f.apply_gamma) + { + float file_gamma = (float)ctx->gama / 100000.0f; + float max; + + unsigned lut_entries; + + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGB8)) + { + lut_entries = 256; + max = 255.0f; + + gamma_lut = ctx->gamma_lut8; + ctx->gamma_lut = ctx->gamma_lut8; + } + else /* SPNG_FMT_RGBA16 */ + { + lut_entries = 65536; + max = 65535.0f; + + ctx->gamma_lut16 = spng__malloc(ctx, lut_entries * sizeof(uint16_t)); + if(ctx->gamma_lut16 == NULL) return decode_err(ctx, SPNG_EMEM); + + gamma_lut = ctx->gamma_lut16; + ctx->gamma_lut = ctx->gamma_lut16; + } + + float screen_gamma = 2.2f; + float exponent = file_gamma * screen_gamma; + + if(FP_ZERO == fpclassify(exponent)) return decode_err(ctx, SPNG_EGAMA); + + exponent = 1.0f / exponent; + + unsigned i; + for(i=0; i < lut_entries; i++) + { + float c = pow((float)i / max, exponent) * max; + if(c > max) c = max; + + gamma_lut[i] = (uint16_t)c; + } + } + + struct spng_sbit *sb = &ctx->decode_sb; + + sb->red_bits = processing_depth; + sb->green_bits = processing_depth; + sb->blue_bits = processing_depth; + sb->alpha_bits = processing_depth; + sb->grayscale_bits = processing_depth; + + if(f.use_sbit) + { + if(ihdr->color_type == 0) + { + sb->grayscale_bits = ctx->sbit.grayscale_bits; + sb->alpha_bits = ihdr->bit_depth; + } + else if(ihdr->color_type == 2 || ihdr->color_type == 3) + { + sb->red_bits = ctx->sbit.red_bits; + sb->green_bits = ctx->sbit.green_bits; + sb->blue_bits = ctx->sbit.blue_bits; + sb->alpha_bits = ihdr->bit_depth; + } + else if(ihdr->color_type == 4) + { + sb->grayscale_bits = ctx->sbit.grayscale_bits; + sb->alpha_bits = ctx->sbit.alpha_bits; + } + else /* == 6 */ + { + sb->red_bits = ctx->sbit.red_bits; + sb->green_bits = ctx->sbit.green_bits; + sb->blue_bits = ctx->sbit.blue_bits; + sb->alpha_bits = ctx->sbit.alpha_bits; + } + } + + if(ihdr->bit_depth == 16 && fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGB8)) + {/* samples are scaled down by 8 bits in the decode loop */ + sb->red_bits -= 8; + sb->green_bits -= 8; + sb->blue_bits -= 8; + sb->alpha_bits -= 8; + sb->grayscale_bits -= 8; + + processing_depth = 8; + } + + /* Prevent infinite loops in sample_to_target() */ + if(!depth_target || depth_target > 16 || + !processing_depth || processing_depth > 16 || + !sb->grayscale_bits || sb->grayscale_bits > processing_depth || + !sb->alpha_bits || sb->alpha_bits > processing_depth || + !sb->red_bits || sb->red_bits > processing_depth || + !sb->green_bits || sb->green_bits > processing_depth || + !sb->blue_bits || sb->blue_bits > processing_depth) + { + return decode_err(ctx, SPNG_ESBIT); + } + + if(sb->red_bits == sb->green_bits && + sb->green_bits == sb->blue_bits && + sb->blue_bits == sb->alpha_bits && + sb->alpha_bits == processing_depth && + processing_depth == depth_target) f.do_scaling = 0; + + struct spng_plte_entry *plte = ctx->decode_plte.rgba; + + /* Pre-process palette entries */ + if(f.indexed) + { + uint8_t red, green, blue, alpha; + + uint32_t i; + for(i=0; i < 256; i++) + { + if(f.apply_trns && i < ctx->trns.n_type3_entries) + ctx->plte.entries[i].alpha = ctx->trns.type3_alpha[i]; + else + ctx->plte.entries[i].alpha = 255; + + red = sample_to_target(ctx->plte.entries[i].red, 8, sb->red_bits, 8); + green = sample_to_target(ctx->plte.entries[i].green, 8, sb->green_bits, 8); + blue = sample_to_target(ctx->plte.entries[i].blue, 8, sb->blue_bits, 8); + alpha = sample_to_target(ctx->plte.entries[i].alpha, 8, sb->alpha_bits, 8); + +#if defined(SPNG_ARM) + if(fmt == SPNG_FMT_RGB8 && ihdr->bit_depth == 8) + {/* Working with 3 bytes at a time is more of an ARM thing */ + ctx->decode_plte.rgb[i * 3 + 0] = red; + ctx->decode_plte.rgb[i * 3 + 1] = green; + ctx->decode_plte.rgb[i * 3 + 2] = blue; + continue; + } +#endif + plte[i].red = red; + plte[i].green = green; + plte[i].blue = blue; + plte[i].alpha = alpha; + } + + f.apply_trns = 0; + } + + unsigned char *trns_px = ctx->trns_px; + + if(f.apply_trns) + { + if(fmt & (SPNG_FMT_RGBA8 | SPNG_FMT_RGBA16)) + { + if(ihdr->color_type == SPNG_COLOR_TYPE_TRUECOLOR) + { + if(ihdr->bit_depth == 16) + { + memcpy(trns_px, &ctx->trns.red, 2); + memcpy(trns_px + 2, &ctx->trns.green, 2); + memcpy(trns_px + 4, &ctx->trns.blue, 2); + } + else + { + trns_px[0] = ctx->trns.red; + trns_px[1] = ctx->trns.green; + trns_px[2] = ctx->trns.blue; + } + } + } + else if(ihdr->color_type == SPNG_COLOR_TYPE_GRAYSCALE) // fmt == SPNG_FMT_GA8 && + { + if(ihdr->bit_depth == 16) + { + memcpy(trns_px, &ctx->trns.gray, 2); + } + else + { + trns_px[0] = ctx->trns.gray; + } + } + } + + ctx->decode_flags = f; + + ctx->state = SPNG_STATE_DECODE_INIT; + + struct spng_row_info *ri = &ctx->row_info; + struct spng_subimage *sub = ctx->subimage; + + while(!sub[ri->pass].width || !sub[ri->pass].height) ri->pass++; + + if(f.interlaced) ri->row_num = adam7_y_start[ri->pass]; + + unsigned pixel_size = 4; /* SPNG_FMT_RGBA8 */ + + if(fmt == SPNG_FMT_RGBA16) pixel_size = 8; + else if(fmt == SPNG_FMT_RGB8) pixel_size = 3; + else if(fmt == SPNG_FMT_G8) pixel_size = 1; + else if(fmt == SPNG_FMT_GA8) pixel_size = 2; + + int i; + for(i=ri->pass; i <= ctx->last_pass; i++) + { + if(!sub[i].scanline_width) continue; + + if(fmt & (SPNG_FMT_PNG | SPNG_FMT_RAW)) sub[i].out_width = sub[i].scanline_width - 1; + else sub[i].out_width = (size_t)sub[i].width * pixel_size; + + if(sub[i].out_width > UINT32_MAX) return decode_err(ctx, SPNG_EOVERFLOW); + } + + /* Read the first filter byte, offsetting all reads by 1 byte. + The scanlines will be aligned with the start of the array with + the next scanline's filter byte at the end, + the last scanline will end up being 1 byte "shorter". */ + ret = read_scanline_bytes(ctx, &ri->filter, 1); + if(ret) return decode_err(ctx, ret); + + if(ri->filter > 4) return decode_err(ctx, SPNG_EFILTER); + + if(flags & SPNG_DECODE_PROGRESSIVE) + { + return 0; + } + + do + { + size_t ioffset = ri->row_num * ctx->out_width; + + ret = spng_decode_row(ctx, (unsigned char*)out + ioffset, ctx->out_width); + }while(!ret); + + if(ret != SPNG_EOI) return decode_err(ctx, ret); + + return 0; +} + +int spng_get_row_info(spng_ctx *ctx, struct spng_row_info *row_info) +{ + if(ctx == NULL || row_info == NULL || ctx->state < SPNG_STATE_DECODE_INIT) return 1; + + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + + *row_info = ctx->row_info; + + return 0; +} + +static int write_chunks_before_idat(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + if(!ctx->encode_only) return SPNG_EINTERNAL; + if(!ctx->stored.ihdr) return SPNG_EINTERNAL; + + int ret; + uint32_t i, length; + const struct spng_ihdr *ihdr = &ctx->ihdr; + unsigned char *data = ctx->decode_plte.raw; + + ret = write_data(ctx, png_signature, 8); + if(ret) return ret; + + write_u32(data, ihdr->width); + write_u32(data + 4, ihdr->height); + data[8] = ihdr->bit_depth; + data[9] = ihdr->color_type; + data[10] = ihdr->compression_method; + data[11] = ihdr->filter_method; + data[12] = ihdr->interlace_method; + + ret = write_chunk(ctx, type_ihdr, data, 13); + if(ret) return ret; + + if(ctx->stored.chrm) + { + write_u32(data, ctx->chrm_int.white_point_x); + write_u32(data + 4, ctx->chrm_int.white_point_y); + write_u32(data + 8, ctx->chrm_int.red_x); + write_u32(data + 12, ctx->chrm_int.red_y); + write_u32(data + 16, ctx->chrm_int.green_x); + write_u32(data + 20, ctx->chrm_int.green_y); + write_u32(data + 24, ctx->chrm_int.blue_x); + write_u32(data + 28, ctx->chrm_int.blue_y); + + ret = write_chunk(ctx, type_chrm, data, 32); + if(ret) return ret; + } + + if(ctx->stored.gama) + { + write_u32(data, ctx->gama); + + ret = write_chunk(ctx, type_gama, data, 4); + if(ret) return ret; + } + + if(ctx->stored.iccp) + { + uLongf dest_len = compressBound(ctx->iccp.profile_len); + + Bytef *buf = spng__malloc(ctx, dest_len); + if(buf == NULL) return SPNG_EMEM; + + ret = compress2(buf, &dest_len, (void*)ctx->iccp.profile, ctx->iccp.profile_len, Z_DEFAULT_COMPRESSION); + + if(ret != Z_OK) + { + spng__free(ctx, buf); + return SPNG_EZLIB; + } + + uint32_t name_len = strlen(ctx->iccp.profile_name); + + length = name_len + 2; + length += dest_len; + + if(dest_len > length) return SPNG_EOVERFLOW; + + unsigned char *cdata = NULL; + + ret = write_header(ctx, type_iccp, length, &cdata); + + if(ret) + { + spng__free(ctx, buf); + return ret; + } + + memcpy(cdata, ctx->iccp.profile_name, name_len + 1); + cdata[name_len + 1] = 0; /* compression method */ + memcpy(cdata + name_len + 2, buf, dest_len); + + spng__free(ctx, buf); + + ret = finish_chunk(ctx); + if(ret) return ret; + } + + if(ctx->stored.sbit) + { + switch(ctx->ihdr.color_type) + { + case SPNG_COLOR_TYPE_GRAYSCALE: + { + length = 1; + + data[0] = ctx->sbit.grayscale_bits; + + break; + } + case SPNG_COLOR_TYPE_TRUECOLOR: + case SPNG_COLOR_TYPE_INDEXED: + { + length = 3; + + data[0] = ctx->sbit.red_bits; + data[1] = ctx->sbit.green_bits; + data[2] = ctx->sbit.blue_bits; + + break; + } + case SPNG_COLOR_TYPE_GRAYSCALE_ALPHA: + { + length = 2; + + data[0] = ctx->sbit.grayscale_bits; + data[1] = ctx->sbit.alpha_bits; + + break; + } + case SPNG_COLOR_TYPE_TRUECOLOR_ALPHA: + { + length = 4; + + data[0] = ctx->sbit.red_bits; + data[1] = ctx->sbit.green_bits; + data[2] = ctx->sbit.blue_bits; + data[3] = ctx->sbit.alpha_bits; + + break; + } + default: return SPNG_EINTERNAL; + } + + ret = write_chunk(ctx, type_sbit, data, length); + if(ret) return ret; + } + + if(ctx->stored.srgb) + { + ret = write_chunk(ctx, type_srgb, &ctx->srgb_rendering_intent, 1); + if(ret) return ret; + } + + if(ctx->stored.unknown) + { + uint32_t i; + for(i=0; i < ctx->n_chunks; i++) + { + struct spng_unknown_chunk *chunk = &ctx->chunk_list[i]; + + if(chunk->location == SPNG_AFTER_IHDR) + { + int ret = write_chunk(ctx, chunk->type, chunk->data, chunk->length); + if(ret) return ret; + } + } + } + + if(ctx->stored.plte) + { + for(i=0; i < ctx->plte.n_entries; i++) + { + data[i * 3 + 0] = ctx->plte.entries[i].red; + data[i * 3 + 1] = ctx->plte.entries[i].green; + data[i * 3 + 2] = ctx->plte.entries[i].blue; + } + + ret = write_chunk(ctx, type_plte, data, ctx->plte.n_entries * 3); + if(ret) return ret; + } + + if(ctx->stored.bkgd) + { + switch(ctx->ihdr.color_type) + { + case SPNG_COLOR_TYPE_GRAYSCALE: + case SPNG_COLOR_TYPE_GRAYSCALE_ALPHA: + { + length = 2; + + write_u16(data, ctx->bkgd.gray); + + break; + } + case SPNG_COLOR_TYPE_TRUECOLOR: + case SPNG_COLOR_TYPE_TRUECOLOR_ALPHA: + { + length = 6; + + write_u16(data, ctx->bkgd.red); + write_u16(data + 2, ctx->bkgd.green); + write_u16(data + 4, ctx->bkgd.blue); + + break; + } + case SPNG_COLOR_TYPE_INDEXED: + { + length = 1; + + data[0] = ctx->bkgd.plte_index; + + break; + } + default: return SPNG_EINTERNAL; + } + + ret = write_chunk(ctx, type_bkgd, data, length); + if(ret) return ret; + } + + if(ctx->stored.hist) + { + length = ctx->plte.n_entries * 2; + + for(i=0; i < ctx->plte.n_entries; i++) + { + write_u16(data + i * 2, ctx->hist.frequency[i]); + } + + ret = write_chunk(ctx, type_hist, data, length); + if(ret) return ret; + } + + if(ctx->stored.trns) + { + if(ctx->ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE) + { + write_u16(data, ctx->trns.gray); + + ret = write_chunk(ctx, type_trns, data, 2); + } + else if(ctx->ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR) + { + write_u16(data, ctx->trns.red); + write_u16(data + 2, ctx->trns.green); + write_u16(data + 4, ctx->trns.blue); + + ret = write_chunk(ctx, type_trns, data, 6); + } + else if(ctx->ihdr.color_type == SPNG_COLOR_TYPE_INDEXED) + { + ret = write_chunk(ctx, type_trns, ctx->trns.type3_alpha, ctx->trns.n_type3_entries); + } + + if(ret) return ret; + } + + if(ctx->stored.phys) + { + write_u32(data, ctx->phys.ppu_x); + write_u32(data + 4, ctx->phys.ppu_y); + data[8] = ctx->phys.unit_specifier; + + ret = write_chunk(ctx, type_phys, data, 9); + if(ret) return ret; + } + + if(ctx->stored.splt) + { + const struct spng_splt *splt; + unsigned char *cdata = NULL; + + uint32_t k; + for(i=0; i < ctx->n_splt; i++) + { + splt = &ctx->splt_list[i]; + + size_t name_len = strlen(splt->name); + length = name_len + 1; + + if(splt->sample_depth == 8) length += splt->n_entries * 6 + 1; + else if(splt->sample_depth == 16) length += splt->n_entries * 10 + 1; + + ret = write_header(ctx, type_splt, length, &cdata); + if(ret) return ret; + + memcpy(cdata, splt->name, name_len + 1); + cdata += name_len + 2; + cdata[-1] = splt->sample_depth; + + if(splt->sample_depth == 8) + { + for(k=0; k < splt->n_entries; k++) + { + cdata[k * 6 + 0] = splt->entries[k].red; + cdata[k * 6 + 1] = splt->entries[k].green; + cdata[k * 6 + 2] = splt->entries[k].blue; + cdata[k * 6 + 3] = splt->entries[k].alpha; + write_u16(cdata + k * 6 + 4, splt->entries[k].frequency); + } + } + else if(splt->sample_depth == 16) + { + for(k=0; k < splt->n_entries; k++) + { + write_u16(cdata + k * 10 + 0, splt->entries[k].red); + write_u16(cdata + k * 10 + 2, splt->entries[k].green); + write_u16(cdata + k * 10 + 4, splt->entries[k].blue); + write_u16(cdata + k * 10 + 6, splt->entries[k].alpha); + write_u16(cdata + k * 10 + 8, splt->entries[k].frequency); + } + } + + ret = finish_chunk(ctx); + if(ret) return ret; + } + } + + if(ctx->stored.time) + { + write_u16(data, ctx->time.year); + data[2] = ctx->time.month; + data[3] = ctx->time.day; + data[4] = ctx->time.hour; + data[5] = ctx->time.minute; + data[6] = ctx->time.second; + + ret = write_chunk(ctx, type_time, data, 7); + if(ret) return ret; + } + + if(ctx->stored.text) + { + unsigned char *cdata = NULL; + const struct spng_text2 *text; + const uint8_t *text_type_array[4] = { 0, type_text, type_ztxt, type_itxt }; + + for(i=0; i < ctx->n_text; i++) + { + text = &ctx->text_list[i]; + + const uint8_t *text_chunk_type = text_type_array[text->type]; + Bytef *compressed_text = NULL; + size_t keyword_len = 0; + size_t language_tag_len = 0; + size_t translated_keyword_len = 0; + size_t compressed_length = 0; + size_t text_length = 0; + + keyword_len = strlen(text->keyword); + text_length = strlen(text->text); + + length = keyword_len + 1; + + if(text->type == SPNG_ZTXT) + { + length += 1; /* compression method */ + } + else if(text->type == SPNG_ITXT) + { + if(!text->language_tag || !text->translated_keyword) return SPNG_EINTERNAL; + + language_tag_len = strlen(text->language_tag); + translated_keyword_len = strlen(text->translated_keyword); + + length += language_tag_len; + if(length < language_tag_len) return SPNG_EOVERFLOW; + + length += translated_keyword_len; + if(length < translated_keyword_len) return SPNG_EOVERFLOW; + + length += 4; /* compression flag + method + nul for the two strings */ + if(length < 4) return SPNG_EOVERFLOW; + } + + if(text->compression_flag) + { + ret = spng__deflate_init(ctx, &ctx->text_options); + if(ret) return ret; + + z_stream *zstream = &ctx->zstream; + uLongf dest_len = deflateBound(zstream, text_length); + + compressed_text = spng__malloc(ctx, dest_len); + + if(compressed_text == NULL) return SPNG_EMEM; + + zstream->next_in = (void*)text->text; + zstream->avail_in = text_length; + + zstream->next_out = compressed_text; + zstream->avail_out = dest_len; + + ret = deflate(zstream, Z_FINISH); + + if(ret != Z_STREAM_END) + { + spng__free(ctx, compressed_text); + return SPNG_EZLIB; + } + + compressed_length = zstream->total_out; + + length += compressed_length; + if(length < compressed_length) return SPNG_EOVERFLOW; + } + else + { + text_length = strlen(text->text); + + length += text_length; + if(length < text_length) return SPNG_EOVERFLOW; + } + + ret = write_header(ctx, text_chunk_type, length, &cdata); + if(ret) + { + spng__free(ctx, compressed_text); + return ret; + } + + memcpy(cdata, text->keyword, keyword_len + 1); + cdata += keyword_len + 1; + + if(text->type == SPNG_ITXT) + { + cdata[0] = text->compression_flag; + cdata[1] = 0; /* compression method */ + cdata += 2; + + memcpy(cdata, text->language_tag, language_tag_len + 1); + cdata += language_tag_len + 1; + + memcpy(cdata, text->translated_keyword, translated_keyword_len + 1); + cdata += translated_keyword_len + 1; + } + else if(text->type == SPNG_ZTXT) + { + cdata[0] = 0; /* compression method */ + cdata++; + } + + if(text->compression_flag) memcpy(cdata, compressed_text, compressed_length); + else memcpy(cdata, text->text, text_length); + + spng__free(ctx, compressed_text); + + ret = finish_chunk(ctx); + if(ret) return ret; + } + } + + if(ctx->stored.offs) + { + write_s32(data, ctx->offs.x); + write_s32(data + 4, ctx->offs.y); + data[8] = ctx->offs.unit_specifier; + + ret = write_chunk(ctx, type_offs, data, 9); + if(ret) return ret; + } + + if(ctx->stored.exif) + { + ret = write_chunk(ctx, type_exif, ctx->exif.data, ctx->exif.length); + if(ret) return ret; + } + + if(ctx->stored.unknown) + { + uint32_t i; + for(i=0; i < ctx->n_chunks; i++) + { + struct spng_unknown_chunk *chunk = &ctx->chunk_list[i]; + + if(chunk->location == SPNG_AFTER_PLTE) + { + int ret = write_chunk(ctx, chunk->type, chunk->data, chunk->length); + if(ret) return ret; + } + } + } + + return 0; +} + +static int write_chunks_after_idat(spng_ctx *ctx) +{ + if(ctx == NULL) return SPNG_EINTERNAL; + + if(ctx->stored.unknown) + { + uint32_t i; + for(i=0; i < ctx->n_chunks; i++) + { + struct spng_unknown_chunk *chunk = &ctx->chunk_list[i]; + + if(chunk->location == SPNG_AFTER_IDAT) + { + int ret = write_chunk(ctx, chunk->type, chunk->data, chunk->length); + if(ret) return ret; + } + } + } + + return write_iend(ctx); +} + +/* Compress and write scanline to IDAT stream */ +static int write_idat_bytes(spng_ctx *ctx, const void *scanline, size_t len, int flush) +{ + if(ctx == NULL || scanline == NULL) return SPNG_EINTERNAL; + + int ret = 0; + unsigned char *data = NULL; + z_stream *zstream = &ctx->zstream; + uint32_t idat_length = SPNG_WRITE_SIZE; + + zstream->next_in = scanline; + zstream->avail_in = len; + + do + { + ret = deflate(zstream, flush); + + if(zstream->avail_out == 0) + { + ret = finish_chunk(ctx); + if(ret) return encode_err(ctx, ret); + + ret = write_header(ctx, type_idat, idat_length, &data); + if(ret) return encode_err(ctx, ret); + + zstream->next_out = data; + zstream->avail_out = idat_length; + } + + }while(zstream->avail_in); + + if(ret != Z_OK) return SPNG_EZLIB; + + return 0; +} + +static int finish_idat(spng_ctx *ctx) +{ + int ret = 0; + unsigned char *data = NULL; + z_stream *zstream = &ctx->zstream; + uint32_t idat_length = SPNG_WRITE_SIZE; + + while(ret != Z_STREAM_END) + { + ret = deflate(zstream, Z_FINISH); + + if(ret) + { + if(ret == Z_STREAM_END) break; + + if(ret != Z_BUF_ERROR) return SPNG_EZLIB; + } + + if(zstream->avail_out == 0) + { + ret = finish_chunk(ctx); + if(ret) return encode_err(ctx, ret); + + ret = write_header(ctx, type_idat, idat_length, &data); + if(ret) return encode_err(ctx, ret); + + zstream->next_out = data; + zstream->avail_out = idat_length; + } + } + + uint32_t trimmed_length = idat_length - zstream->avail_out; + void *length_ptr = ctx->write_ptr - 8; + + ctx->current_chunk.length = trimmed_length; + write_u32(length_ptr, trimmed_length); + + return finish_chunk(ctx); +} + +static int encode_scanline(spng_ctx *ctx, const void *scanline, size_t len) +{ + if(ctx == NULL || scanline == NULL) return SPNG_EINTERNAL; + + int ret, pass = ctx->row_info.pass; + uint8_t filter = 0; + struct spng_row_info *ri = &ctx->row_info; + const struct spng_subimage *sub = ctx->subimage; + struct encode_flags f = ctx->encode_flags; + unsigned char *filtered_scanline = ctx->filtered_scanline; + size_t scanline_width = sub[pass].scanline_width; + + /* encode_row() interlaces directly to ctx->scanline */ + if(scanline != ctx->scanline) memcpy(ctx->scanline, scanline, scanline_width - 1); + + if(ctx->ihdr.bit_depth == 16 && ctx->fmt != SPNG_FMT_RAW) u16_row_to_bigendian(ctx->scanline, scanline_width - 1); + + const int requires_previous = f.filter_choice & (SPNG_FILTER_CHOICE_UP | SPNG_FILTER_CHOICE_AVG | SPNG_FILTER_CHOICE_PAETH); + + /* XXX: exclude 'requires_previous' filters by default for first scanline? */ + if(!ri->scanline_idx && requires_previous) + { + /* prev_scanline is all zeros for the first scanline */ + memset(ctx->prev_scanline, 0, scanline_width); + } + + filter = get_best_filter(ctx->prev_scanline, ctx->scanline, scanline_width, ctx->bytes_per_pixel, f.filter_choice); + + if(!filter) filtered_scanline = ctx->scanline; + + filtered_scanline[-1] = filter; + + if(filter) + { + ret = filter_scanline(filtered_scanline, ctx->prev_scanline, ctx->scanline, scanline_width, ctx->bytes_per_pixel, filter); + if(ret) return encode_err(ctx, ret); + } + + ret = write_idat_bytes(ctx, filtered_scanline - 1, scanline_width, Z_NO_FLUSH); + if(ret) return encode_err(ctx, ret); + + /* The previous scanline is always unfiltered */ + void *t = ctx->prev_scanline; + ctx->prev_scanline = ctx->scanline; + ctx->scanline = t; + + return update_row_info(ctx); +} + +static int encode_row(spng_ctx *ctx, const void *row, size_t len) +{ + if(ctx == NULL || row == NULL) return SPNG_EINTERNAL; + + if(!ctx->ihdr.interlace_method) return encode_scanline(ctx, row, len); + + uint32_t k; + const int pass = ctx->row_info.pass; + const unsigned pixel_size = ctx->pixel_size; + const unsigned bit_depth = ctx->ihdr.bit_depth; + + if(bit_depth < 8) + { + const unsigned samples_per_byte = 8 / bit_depth; + const uint8_t mask = (1 << bit_depth) - 1; + const unsigned initial_shift = 8 - bit_depth; + unsigned shift_amount = initial_shift; + + unsigned char *scanline = ctx->scanline; + const unsigned char *row_uc = row; + uint8_t sample; + + memset(scanline, 0, len); + + for(k=0; k < ctx->subimage[pass].width; k++) + { + size_t ioffset = adam7_x_start[pass] + k * adam7_x_delta[pass]; + + sample = row_uc[ioffset / samples_per_byte]; + + sample = sample >> (initial_shift - ioffset * bit_depth % 8); + sample = sample & mask; + sample = sample << shift_amount; + + scanline[0] |= sample; + + shift_amount -= bit_depth; + + if(shift_amount > 7) + { + shift_amount = initial_shift; + scanline++; + } + } + + return encode_scanline(ctx, ctx->scanline, len); + } + + for(k=0; k < ctx->subimage[pass].width; k++) + { + size_t ioffset = (adam7_x_start[pass] + (size_t) k * adam7_x_delta[pass]) * pixel_size; + + memcpy(ctx->scanline + k * pixel_size, (unsigned char*)row + ioffset, pixel_size); + } + + return encode_scanline(ctx, ctx->scanline, len); +} + +int spng_encode_scanline(spng_ctx *ctx, const void *scanline, size_t len) +{ + if(ctx == NULL || scanline == NULL) return SPNG_EINVAL; + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + if(len < (ctx->subimage[ctx->row_info.pass].scanline_width -1) ) return SPNG_EBUFSIZ; + + return encode_scanline(ctx, scanline, len); +} + +int spng_encode_row(spng_ctx *ctx, const void *row, size_t len) +{ + if(ctx == NULL || row == NULL) return SPNG_EINVAL; + if(ctx->state >= SPNG_STATE_EOI) return SPNG_EOI; + if(len < ctx->out_width) return SPNG_EBUFSIZ; + + return encode_row(ctx, row, len); +} + +int spng_encode_image(spng_ctx *ctx, const void *img, size_t len, int fmt, int flags) +{ + if(ctx == NULL) return 1; + if(!ctx->state) return SPNG_EBADSTATE; + if(!ctx->stored.ihdr) return SPNG_ENOIHDR; + if(fmt != SPNG_FMT_PNG) return SPNG_EFMT; + + int ret = 0; + size_t img_len = 0; + const struct spng_ihdr *ihdr = &ctx->ihdr; + struct encode_flags *encode_flags = &ctx->encode_flags; + + if(ihdr->color_type == SPNG_COLOR_TYPE_INDEXED && !ctx->stored.plte) return SPNG_ENOPLTE; + + ctx->channels = num_channels(ihdr); + + ret = calculate_image_size(ctx, fmt, &img_len); + if(ret) return encode_err(ctx, ret); + + if( !(flags & SPNG_ENCODE_PROGRESSIVE) ) + { + if(img == NULL) return 1; + if(img_len != len) return SPNG_EBUFSIZ; + } + + ret = write_chunks_before_idat(ctx); + if(ret) return encode_err(ctx, ret); + + ret = calculate_subimages(ctx); + if(ret) return encode_err(ctx, ret); + + if(ihdr->bit_depth < 8) ctx->bytes_per_pixel = 1; + else ctx->bytes_per_pixel = ctx->channels * (ihdr->bit_depth / 8); + + ctx->out_width = ctx->total_out_size / ihdr->height; + + if(!ctx->image_options.compression_level) + { + encode_flags->filter_choice = 0; /* Filtering would make no difference */ + } + + if(ihdr->color_type == SPNG_COLOR_TYPE_INDEXED || ihdr->bit_depth < 8) + { + encode_flags->filter_choice = 0; + } + + /* This is the same as disabling filtering */ + if(encode_flags->filter_choice == SPNG_FILTER_CHOICE_NONE) + { + encode_flags->filter_choice = 0; + } + + if(!encode_flags->filter_choice) + { + ctx->image_options.strategy = Z_DEFAULT_STRATEGY; + } + + ret = spng__deflate_init(ctx, &ctx->image_options); + if(ret) return encode_err(ctx, ret); + + size_t scanline_buf_size = ctx->subimage[ctx->widest_pass].scanline_width; + + scanline_buf_size += 32; + + if(scanline_buf_size < 32) return SPNG_EOVERFLOW; + + ctx->scanline_buf = spng__malloc(ctx, scanline_buf_size); + ctx->prev_scanline_buf = spng__malloc(ctx, scanline_buf_size); + + if(ctx->scanline_buf == NULL || ctx->prev_scanline_buf == NULL) return encode_err(ctx, SPNG_EMEM); + + /* Maintain alignment for pixels, filter at [-1] */ + ctx->scanline = ctx->scanline_buf + 16; + ctx->prev_scanline = ctx->prev_scanline_buf + 16; + + if(encode_flags->filter_choice) + { + ctx->filtered_scanline_buf = spng__malloc(ctx, scanline_buf_size); + if(ctx->filtered_scanline_buf == NULL) return encode_err(ctx, SPNG_EMEM); + + ctx->filtered_scanline = ctx->filtered_scanline_buf + 16; + } + + struct spng_subimage *sub = ctx->subimage; + struct spng_row_info *ri = &ctx->row_info; + + size_t img_width = img_len / ihdr->height; + + ctx->fmt = fmt; + + z_stream *zstream = &ctx->zstream; + zstream->avail_out = SPNG_WRITE_SIZE; + + ret = write_header(ctx, type_idat, zstream->avail_out, &zstream->next_out); + if(ret) return encode_err(ctx, ret); + + if(ihdr->interlace_method) encode_flags->interlace = 1; + + if(fmt & (SPNG_FMT_PNG | SPNG_FMT_RAW) ) encode_flags->same_layout = 1; + + while(!sub[ri->pass].width || !sub[ri->pass].height) ri->pass++; + + if(encode_flags->interlace) ri->row_num = adam7_y_start[ri->pass]; + + ctx->pixel_size = 4; /* SPNG_FMT_RGBA8 */ + + if(fmt == SPNG_FMT_RGBA16) ctx->pixel_size = 8; + else if(fmt == SPNG_FMT_RGB8) ctx->pixel_size = 3; + else if(fmt == SPNG_FMT_G8) ctx->pixel_size = 1; + else if(fmt == SPNG_FMT_GA8) ctx->pixel_size = 2; + else if(ctx->fmt & (SPNG_FMT_PNG | SPNG_FMT_RAW)) + { + if(ihdr->bit_depth >= 8) ctx->pixel_size = ctx->bytes_per_pixel; + } + + ctx->state = SPNG_STATE_FIRST_IDAT; + + if(flags & SPNG_ENCODE_PROGRESSIVE) + { + return 0; + } + + do + { + size_t ioffset = ri->row_num * img_width; + + ret = encode_row(ctx, (unsigned char*)img + ioffset, img_width); + + }while(!ret); + + if(ret != SPNG_EOI) return encode_err(ctx, ret); + + ctx->state = SPNG_STATE_EOI; + + ret = finish_idat(ctx); + if(ret) encode_err(ctx, ret); + + ctx->state = SPNG_STATE_LAST_IDAT; + + ret = write_chunks_after_idat(ctx); + if(ret) return encode_err(ctx, ret); + + ctx->state = SPNG_STATE_IEND; + + return 0; +} + +spng_ctx *spng_ctx_new(int flags) +{ + struct spng_alloc alloc = + { + .malloc_fn = malloc, + .realloc_fn = realloc, + .calloc_fn = calloc, + .free_fn = free + }; + + return spng_ctx_new2(&alloc, flags); +} + +spng_ctx *spng_ctx_new2(struct spng_alloc *alloc, int flags) +{ + if(alloc == NULL) return NULL; + if(flags != (flags & SPNG_CTX_IGNORE_ADLER32)) return NULL; + + if(alloc->malloc_fn == NULL) return NULL; + if(alloc->realloc_fn == NULL) return NULL; + if(alloc->calloc_fn == NULL) return NULL; + if(alloc->free_fn == NULL) return NULL; + + spng_ctx *ctx = alloc->calloc_fn(1, sizeof(spng_ctx)); + if(ctx == NULL) return NULL; + + ctx->alloc = *alloc; + + ctx->max_width = png_u32max; + ctx->max_height = png_u32max; + + ctx->max_chunk_size = png_u32max; + ctx->chunk_cache_limit = SIZE_MAX; + + ctx->state = SPNG_STATE_INIT; + + ctx->crc_action_critical = SPNG_CRC_ERROR; + ctx->crc_action_ancillary = SPNG_CRC_DISCARD; + + const struct spng__deflate_options image_defaults = + { + .compression_level = Z_DEFAULT_COMPRESSION, + .window_bits = 15, + .mem_level = 8, + .strategy = Z_FILTERED, + .data_type = 0 /* Z_BINARY */ + }; + + const struct spng__deflate_options text_defaults = + { + .compression_level = Z_DEFAULT_COMPRESSION, + .window_bits = 15, + .mem_level = 8, + .strategy = Z_DEFAULT_STRATEGY, + .data_type = 1 /* Z_TEXT */ + }; + + ctx->image_options = image_defaults; + ctx->text_options = text_defaults; + + ctx->encode_flags.filter_choice = SPNG_FILTER_CHOICE_ALL; + + ctx->flags = flags; + + return ctx; +} + +void spng_ctx_free(spng_ctx *ctx) +{ + if(ctx == NULL) return; + + if(ctx->streaming && ctx->stream_buf != NULL) spng__free(ctx, ctx->stream_buf); + + if(!ctx->user.exif) spng__free(ctx, ctx->exif.data); + + if(!ctx->user.iccp) spng__free(ctx, ctx->iccp.profile); + + uint32_t i; + + if(ctx->splt_list != NULL && !ctx->user.splt) + { + for(i=0; i < ctx->n_splt; i++) + { + spng__free(ctx, ctx->splt_list[i].entries); + } + spng__free(ctx, ctx->splt_list); + } + + if(ctx->text_list != NULL) + { + for(i=0; i< ctx->n_text; i++) + { + if(ctx->user.text) break; + + spng__free(ctx, ctx->text_list[i].keyword); + if(ctx->text_list[i].compression_flag) spng__free(ctx, ctx->text_list[i].text); + } + spng__free(ctx, ctx->text_list); + } + + if(ctx->chunk_list != NULL && !ctx->user.unknown) + { + for(i=0; i< ctx->n_chunks; i++) + { + spng__free(ctx, ctx->chunk_list[i].data); + } + spng__free(ctx, ctx->chunk_list); + } + + if(ctx->deflate) deflateEnd(&ctx->zstream); + else inflateEnd(&ctx->zstream); + + if(!ctx->user_owns_out_png) spng__free(ctx, ctx->out_png); + + spng__free(ctx, ctx->gamma_lut16); + + spng__free(ctx, ctx->row_buf); + spng__free(ctx, ctx->scanline_buf); + spng__free(ctx, ctx->prev_scanline_buf); + spng__free(ctx, ctx->filtered_scanline_buf); + + spng_free_fn *free_func = ctx->alloc.free_fn; + + memset(ctx, 0, sizeof(spng_ctx)); + + free_func(ctx); +} + +static int buffer_read_fn(spng_ctx *ctx, void *user, void *data, size_t n) +{ + if(n > ctx->bytes_left) return SPNG_IO_EOF; + + (void)user; + (void)data; + ctx->data = ctx->data + ctx->last_read_size; + + ctx->last_read_size = n; + ctx->bytes_left -= n; + + return 0; +} + +static int file_read_fn(spng_ctx *ctx, void *user, void *data, size_t n) +{ + FILE *file = user; + (void)ctx; + + if(fread(data, n, 1, file) != 1) + { + if(feof(file)) return SPNG_IO_EOF; + else return SPNG_IO_ERROR; + } + + return 0; +} + +int spng_set_png_buffer(spng_ctx *ctx, const void *buf, size_t size) +{ + if(ctx == NULL || buf == NULL) return 1; + if(!ctx->state) return SPNG_EBADSTATE; + if(ctx->encode_only) return SPNG_ENCODE_ONLY; + + if(ctx->data != NULL) return SPNG_EBUF_SET; + + ctx->data = buf; + ctx->png_base = buf; + ctx->data_size = size; + ctx->bytes_left = size; + + ctx->read_fn = buffer_read_fn; + + ctx->state = SPNG_STATE_INPUT; + + return 0; +} + +int spng_set_png_stream(spng_ctx *ctx, spng_rw_fn *rw_func, void *user) +{ + if(ctx == NULL || rw_func == NULL) return 1; + if(!ctx->state) return SPNG_EBADSTATE; + if(ctx->encode_only) return SPNG_ENCODE_ONLY; + + if(ctx->stream_buf != NULL) return SPNG_EBUF_SET; + + ctx->stream_buf = spng__malloc(ctx, SPNG_READ_SIZE); + if(ctx->stream_buf == NULL) return SPNG_EMEM; + + ctx->data = ctx->stream_buf; + ctx->data_size = SPNG_READ_SIZE; + + ctx->read_fn = rw_func; + ctx->read_user_ptr = user; + + ctx->streaming = 1; + + ctx->state = SPNG_STATE_INPUT; + + return 0; +} + +int spng_set_png_file(spng_ctx *ctx, FILE *file) +{ + if(file == NULL) return 1; + + return spng_set_png_stream(ctx, file_read_fn, file); +} + +void *spng_get_png_buffer(spng_ctx *ctx, size_t *len, int *error) +{ + if(!ctx || !len || !ctx->encode_only || ctx->state != SPNG_STATE_IEND) + { + if(error) *error = SPNG_EINVAL; + return NULL; + } + + if(!ctx->state) + { + if(error) *error = SPNG_EBADSTATE; + return NULL; + } + + if(*error) *error = 0; + + ctx->user_owns_out_png = 1; + + *len = ctx->bytes_encoded; + + return ctx->out_png; +} + +int spng_set_image_limits(spng_ctx *ctx, uint32_t width, uint32_t height) +{ + if(ctx == NULL) return 1; + + if(width > png_u32max || height > png_u32max) return 1; + + ctx->max_width = width; + ctx->max_height = height; + + return 0; +} + +int spng_get_image_limits(spng_ctx *ctx, uint32_t *width, uint32_t *height) +{ + if(ctx == NULL || width == NULL || height == NULL) return 1; + + *width = ctx->max_width; + *height = ctx->max_height; + + return 0; +} + +int spng_set_chunk_limits(spng_ctx *ctx, size_t chunk_size, size_t cache_limit) +{ + if(ctx == NULL || chunk_size > png_u32max || chunk_size > cache_limit) return 1; + + ctx->max_chunk_size = chunk_size; + + ctx->chunk_cache_limit = cache_limit; + + return 0; +} + +int spng_get_chunk_limits(spng_ctx *ctx, size_t *chunk_size, size_t *cache_limit) +{ + if(ctx == NULL || chunk_size == NULL || cache_limit == NULL) return 1; + + *chunk_size = ctx->max_chunk_size; + + *cache_limit = ctx->chunk_cache_limit; + + return 0; +} + +int spng_set_crc_action(spng_ctx *ctx, int critical, int ancillary) +{ + if(ctx == NULL) return 1; + + if(critical > 2 || critical < 0) return 1; + if(ancillary > 2 || ancillary < 0) return 1; + + if(critical == SPNG_CRC_DISCARD) return 1; + + ctx->crc_action_critical = critical; + ctx->crc_action_ancillary = ancillary; + + return 0; +} + +int spng_set_option(spng_ctx *ctx, enum spng_option option, int value) +{ + if(ctx == NULL) return 1; + + switch(option) + { + case SPNG_KEEP_UNKNOWN_CHUNKS: + { + ctx->keep_unknown = value ? 1 : 0; + break; + } + case SPNG_IMG_COMPRESSION_LEVEL: + { + ctx->image_options.compression_level = value; + break; + } + case SPNG_IMG_WINDOW_BITS: + { + ctx->image_options.window_bits = value; + break; + } + case SPNG_IMG_MEM_LEVEL: + { + ctx->image_options.mem_level = value; + break; + } + case SPNG_IMG_COMPRESSION_STRATEGY: + { + ctx->image_options.strategy = value; + break; + } + case SPNG_TEXT_COMPRESSION_LEVEL: + { + ctx->text_options.compression_level = value; + break; + } + case SPNG_TEXT_WINDOW_BITS: + { + ctx->text_options.window_bits = value; + break; + } + case SPNG_TEXT_MEM_LEVEL: + { + ctx->text_options.mem_level = value; + break; + } + case SPNG_TEXT_COMPRESSION_STRATEGY: + { + ctx->text_options.strategy = value; + break; + } + case SPNG_FILTER_CHOICE: + { + if(value & ~SPNG_FILTER_CHOICE_ALL) return 1; + ctx->encode_flags.filter_choice = value; + break; + } + default: return 1; + } + + return 0; +} + +int spng_get_option(spng_ctx *ctx, enum spng_option option, int *value) +{ + if(ctx == NULL || value == NULL) return 1; + + switch(option) + { + case SPNG_KEEP_UNKNOWN_CHUNKS: + { + *value = ctx->keep_unknown; + break; + } + case SPNG_IMG_COMPRESSION_LEVEL: + { + *value = ctx->image_options.compression_level; + break; + } + case SPNG_IMG_WINDOW_BITS: + { + *value = ctx->image_options.window_bits; + break; + } + case SPNG_IMG_MEM_LEVEL: + { + *value = ctx->image_options.mem_level; + break; + } + case SPNG_IMG_COMPRESSION_STRATEGY: + { + *value = ctx->image_options.strategy; + break; + } + case SPNG_TEXT_COMPRESSION_LEVEL: + { + *value = ctx->text_options.compression_level; + break; + } + case SPNG_TEXT_WINDOW_BITS: + { + *value = ctx->text_options.window_bits; + break; + } + case SPNG_TEXT_MEM_LEVEL: + { + *value = ctx->text_options.mem_level; + break; + } + case SPNG_TEXT_COMPRESSION_STRATEGY: + { + *value = ctx->text_options.strategy; + break; + } + case SPNG_FILTER_CHOICE: + { + *value = ctx->encode_flags.filter_choice; + break; + } + default: return 1; + } + + return 0; +} + +int spng_decoded_image_size(spng_ctx *ctx, int fmt, size_t *len) +{ + if(ctx == NULL || len == NULL) return 1; + + int ret = read_chunks(ctx, 1); + if(ret) return ret; + + return calculate_image_size(ctx, fmt, len); +} + +int spng_get_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr) +{ + if(ctx == NULL) return 1; + int ret = read_chunks(ctx, 1); + if(ret) return ret; + if(ihdr == NULL) return 1; + + *ihdr = ctx->ihdr; + + return 0; +} + +int spng_get_plte(spng_ctx *ctx, struct spng_plte *plte) +{ + SPNG_GET_CHUNK_BOILERPLATE(plte); + + *plte = ctx->plte; + + return 0; +} + +int spng_get_trns(spng_ctx *ctx, struct spng_trns *trns) +{ + SPNG_GET_CHUNK_BOILERPLATE(trns); + + *trns = ctx->trns; + + return 0; +} + +int spng_get_chrm(spng_ctx *ctx, struct spng_chrm *chrm) +{ + SPNG_GET_CHUNK_BOILERPLATE(chrm); + + chrm->white_point_x = (double)ctx->chrm_int.white_point_x / 100000.0; + chrm->white_point_y = (double)ctx->chrm_int.white_point_y / 100000.0; + chrm->red_x = (double)ctx->chrm_int.red_x / 100000.0; + chrm->red_y = (double)ctx->chrm_int.red_y / 100000.0; + chrm->blue_y = (double)ctx->chrm_int.blue_y / 100000.0; + chrm->blue_x = (double)ctx->chrm_int.blue_x / 100000.0; + chrm->green_x = (double)ctx->chrm_int.green_x / 100000.0; + chrm->green_y = (double)ctx->chrm_int.green_y / 100000.0; + + return 0; +} + +int spng_get_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm) +{ + SPNG_GET_CHUNK_BOILERPLATE(chrm); + + *chrm = ctx->chrm_int; + + return 0; +} + +int spng_get_gama(spng_ctx *ctx, double *gamma) +{ + double *gama = gamma; + SPNG_GET_CHUNK_BOILERPLATE(gama); + + *gama = (double)ctx->gama / 100000.0; + + return 0; +} + +int spng_get_gama_int(spng_ctx *ctx, uint32_t *gama_int) +{ + uint32_t *gama = gama_int; + SPNG_GET_CHUNK_BOILERPLATE(gama); + + *gama_int = ctx->gama; + + return 0; +} + +int spng_get_iccp(spng_ctx *ctx, struct spng_iccp *iccp) +{ + SPNG_GET_CHUNK_BOILERPLATE(iccp); + + *iccp = ctx->iccp; + + return 0; +} + +int spng_get_sbit(spng_ctx *ctx, struct spng_sbit *sbit) +{ + SPNG_GET_CHUNK_BOILERPLATE(sbit); + + *sbit = ctx->sbit; + + return 0; +} + +int spng_get_srgb(spng_ctx *ctx, uint8_t *rendering_intent) +{ + uint8_t *srgb = rendering_intent; + SPNG_GET_CHUNK_BOILERPLATE(srgb); + + *srgb = ctx->srgb_rendering_intent; + + return 0; +} + +int spng_get_text(spng_ctx *ctx, struct spng_text *text, uint32_t *n_text) +{ + if(ctx == NULL) return 1; + int ret = read_chunks(ctx, 0); + if(ret) return ret; + if(!ctx->stored.text) return SPNG_ECHUNKAVAIL; + if(n_text == NULL) return 1; + + if(text == NULL) + { + *n_text = ctx->n_text; + return 0; + } + + if(*n_text < ctx->n_text) return 1; + + uint32_t i; + for(i=0; i< ctx->n_text; i++) + { + text[i].type = ctx->text_list[i].type; + memcpy(&text[i].keyword, ctx->text_list[i].keyword, strlen(ctx->text_list[i].keyword) + 1); + text[i].compression_method = 0; + text[i].compression_flag = ctx->text_list[i].compression_flag; + text[i].language_tag = ctx->text_list[i].language_tag; + text[i].translated_keyword = ctx->text_list[i].translated_keyword; + text[i].length = ctx->text_list[i].text_length; + text[i].text = ctx->text_list[i].text; + } + + return ret; +} + +int spng_get_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd) +{ + SPNG_GET_CHUNK_BOILERPLATE(bkgd); + + *bkgd = ctx->bkgd; + + return 0; +} + +int spng_get_hist(spng_ctx *ctx, struct spng_hist *hist) +{ + SPNG_GET_CHUNK_BOILERPLATE(hist); + + *hist = ctx->hist; + + return 0; +} + +int spng_get_phys(spng_ctx *ctx, struct spng_phys *phys) +{ + SPNG_GET_CHUNK_BOILERPLATE(phys); + + *phys = ctx->phys; + + return 0; +} + +int spng_get_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t *n_splt) +{ + if(ctx == NULL) return 1; + int ret = read_chunks(ctx, 0); + if(ret) return ret; + if(!ctx->stored.splt) return SPNG_ECHUNKAVAIL; + if(n_splt == NULL) return 1; + + if(splt == NULL) + { + *n_splt = ctx->n_splt; + return 0; + } + + if(*n_splt < ctx->n_splt) return 1; + + memcpy(splt, ctx->splt_list, ctx->n_splt * sizeof(struct spng_splt)); + + return 0; +} + +int spng_get_time(spng_ctx *ctx, struct spng_time *time) +{ + SPNG_GET_CHUNK_BOILERPLATE(time); + + *time = ctx->time; + + return 0; +} + +int spng_get_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t *n_chunks) +{ + if(ctx == NULL) return 1; + int ret = read_chunks(ctx, 0); + if(ret) return ret; + if(!ctx->stored.unknown) return SPNG_ECHUNKAVAIL; + if(n_chunks == NULL) return 1; + + if(chunks == NULL) + { + *n_chunks = ctx->n_chunks; + return 0; + } + + if(*n_chunks < ctx->n_chunks) return 1; + + memcpy(chunks, ctx->chunk_list, sizeof(struct spng_unknown_chunk)); + + return 0; +} + +int spng_get_offs(spng_ctx *ctx, struct spng_offs *offs) +{ + SPNG_GET_CHUNK_BOILERPLATE(offs); + + *offs = ctx->offs; + + return 0; +} + +int spng_get_exif(spng_ctx *ctx, struct spng_exif *exif) +{ + SPNG_GET_CHUNK_BOILERPLATE(exif); + + *exif = ctx->exif; + + return 0; +} + +int spng_set_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr) +{ + SPNG_SET_CHUNK_BOILERPLATE(ihdr); + + if(ctx->stored.ihdr) return 1; + + ret = check_ihdr(ihdr, ctx->max_width, ctx->max_height); + if(ret) return ret; + + ctx->ihdr = *ihdr; + + ctx->stored.ihdr = 1; + ctx->user.ihdr = 1; + + return 0; +} + +int spng_set_plte(spng_ctx *ctx, struct spng_plte *plte) +{ + SPNG_SET_CHUNK_BOILERPLATE(plte); + + if(!ctx->stored.ihdr) return 1; + + if(check_plte(plte, &ctx->ihdr)) return 1; + + ctx->plte = *plte; + + ctx->stored.plte = 1; + ctx->user.plte = 1; + + return 0; +} + +int spng_set_trns(spng_ctx *ctx, struct spng_trns *trns) +{ + SPNG_SET_CHUNK_BOILERPLATE(trns); + + if(!ctx->stored.ihdr) return 1; + + uint16_t mask = ~0; + if(ctx->ihdr.bit_depth < 16) mask = (1 << ctx->ihdr.bit_depth) - 1; + + if(ctx->ihdr.color_type == 0) + { + trns->gray &= mask; + } + else if(ctx->ihdr.color_type == 2) + { + trns->red &= mask; + trns->green &= mask; + trns->blue &= mask; + } + else if(ctx->ihdr.color_type == 3) + { + if(!ctx->stored.plte) return SPNG_ETRNS_NO_PLTE; + } + else return SPNG_ETRNS_COLOR_TYPE; + + ctx->trns = *trns; + + ctx->stored.trns = 1; + ctx->user.trns = 1; + + return 0; +} + +int spng_set_chrm(spng_ctx *ctx, struct spng_chrm *chrm) +{ + SPNG_SET_CHUNK_BOILERPLATE(chrm); + + struct spng_chrm_int chrm_int; + + chrm_int.white_point_x = (uint32_t)(chrm->white_point_x * 100000.0); + chrm_int.white_point_y = (uint32_t)(chrm->white_point_y * 100000.0); + chrm_int.red_x = (uint32_t)(chrm->red_x * 100000.0); + chrm_int.red_y = (uint32_t)(chrm->red_y * 100000.0); + chrm_int.green_x = (uint32_t)(chrm->green_x * 100000.0); + chrm_int.green_y = (uint32_t)(chrm->green_y * 100000.0); + chrm_int.blue_x = (uint32_t)(chrm->blue_x * 100000.0); + chrm_int.blue_y = (uint32_t)(chrm->blue_y * 100000.0); + + if(check_chrm_int(&chrm_int)) return SPNG_ECHRM; + + ctx->chrm_int = chrm_int; + + ctx->stored.chrm = 1; + ctx->user.chrm = 1; + + return 0; +} + +int spng_set_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm_int) +{ + SPNG_SET_CHUNK_BOILERPLATE(chrm_int); + + if(check_chrm_int(chrm_int)) return SPNG_ECHRM; + + ctx->chrm_int = *chrm_int; + + ctx->stored.chrm = 1; + ctx->user.chrm = 1; + + return 0; +} + +int spng_set_gama(spng_ctx *ctx, double gamma) +{ + SPNG_SET_CHUNK_BOILERPLATE(ctx); + + uint32_t gama = gamma * 100000.0; + + if(!gama) return 1; + if(gama > png_u32max) return 1; + + ctx->gama = gama; + + ctx->stored.gama = 1; + ctx->user.gama = 1; + + return 0; +} + +int spng_set_gama_int(spng_ctx *ctx, uint32_t gamma) +{ + SPNG_SET_CHUNK_BOILERPLATE(ctx); + + if(!gamma) return 1; + if(gamma > png_u32max) return 1; + + ctx->gama = gamma; + + ctx->stored.gama = 1; + ctx->user.gama = 1; + + return 0; +} + +int spng_set_iccp(spng_ctx *ctx, struct spng_iccp *iccp) +{ + SPNG_SET_CHUNK_BOILERPLATE(iccp); + + if(check_png_keyword(iccp->profile_name)) return SPNG_EICCP_NAME; + if(!iccp->profile_len) return 1; + + if(ctx->iccp.profile && !ctx->user.iccp) spng__free(ctx, ctx->iccp.profile); + + ctx->iccp = *iccp; + + ctx->stored.iccp = 1; + ctx->user.iccp = 1; + + return 0; +} + +int spng_set_sbit(spng_ctx *ctx, struct spng_sbit *sbit) +{ + SPNG_SET_CHUNK_BOILERPLATE(sbit); + + if(check_sbit(sbit, &ctx->ihdr)) return 1; + + if(!ctx->stored.ihdr) return 1; + + ctx->sbit = *sbit; + + ctx->stored.sbit = 1; + ctx->user.sbit = 1; + + return 0; +} + +int spng_set_srgb(spng_ctx *ctx, uint8_t rendering_intent) +{ + SPNG_SET_CHUNK_BOILERPLATE(ctx); + + if(rendering_intent > 3) return 1; + + ctx->srgb_rendering_intent = rendering_intent; + + ctx->stored.srgb = 1; + ctx->user.srgb = 1; + + return 0; +} + +int spng_set_text(spng_ctx *ctx, struct spng_text *text, uint32_t n_text) +{ + if(!n_text) return 1; + SPNG_SET_CHUNK_BOILERPLATE(text); + + uint32_t i; + for(i=0; i < n_text; i++) + { + if(check_png_keyword(text[i].keyword)) return SPNG_ETEXT_KEYWORD; + if(!text[i].length) return 1; + if(text[i].text == NULL) return 1; + + if(text[i].type == SPNG_TEXT) + { + if(check_png_text(text[i].text, text[i].length)) return 1; + } + else if(text[i].type == SPNG_ZTXT) + { + if(check_png_text(text[i].text, text[i].length)) return 1; + + if(text[i].compression_method != 0) return SPNG_EZTXT_COMPRESSION_METHOD; + } + else if(text[i].type == SPNG_ITXT) + { + if(text[i].compression_flag > 1) return SPNG_EITXT_COMPRESSION_FLAG; + if(text[i].compression_method != 0) return SPNG_EITXT_COMPRESSION_METHOD; + if(text[i].language_tag == NULL) return SPNG_EITXT_LANG_TAG; + if(text[i].translated_keyword == NULL) return SPNG_EITXT_TRANSLATED_KEY; + } + else return 1; + + } + + struct spng_text2 *text_list = spng__calloc(ctx, sizeof(struct spng_text2), n_text); + + if(!text_list) return SPNG_EMEM; + + if(ctx->text_list != NULL) + { + for(i=0; i < ctx->n_text; i++) + { + if(ctx->user.text) break; + + spng__free(ctx, ctx->text_list[i].keyword); + if(ctx->text_list[i].compression_flag) spng__free(ctx, ctx->text_list[i].text); + } + spng__free(ctx, ctx->text_list); + } + + for(i=0; i < n_text; i++) + { + text_list[i].type = text[i].type; + /* Prevent issues with spng_text.keyword[80] going out of scope */ + text_list[i].keyword = text_list[i].user_keyword_storage; + memcpy(text_list[i].user_keyword_storage, text[i].keyword, strlen(text[i].keyword)); + text_list[i].text = text[i].text; + text_list[i].text_length = text[i].length; + + if(text[i].type == SPNG_ZTXT) + { + text_list[i].compression_flag = 1; + } + else if(text[i].type == SPNG_ITXT) + { + text_list[i].compression_flag = text[i].compression_flag; + text_list[i].language_tag = text[i].language_tag; + text_list[i].translated_keyword = text[i].translated_keyword; + } + } + + ctx->text_list = text_list; + ctx->n_text = n_text; + + ctx->stored.text = 1; + ctx->user.text = 1; + + return 0; +} + +int spng_set_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd) +{ + SPNG_SET_CHUNK_BOILERPLATE(bkgd); + + if(!ctx->stored.ihdr) return 1; + + if(ctx->ihdr.color_type == 0 || ctx->ihdr.color_type == 4) + { + ctx->bkgd.gray = bkgd->gray; + } + else if(ctx->ihdr.color_type == 2 || ctx->ihdr.color_type == 6) + { + ctx->bkgd.red = bkgd->red; + ctx->bkgd.green = bkgd->green; + ctx->bkgd.blue = bkgd->blue; + } + else if(ctx->ihdr.color_type == 3) + { + if(!ctx->stored.plte) return SPNG_EBKGD_NO_PLTE; + if(bkgd->plte_index >= ctx->plte.n_entries) return SPNG_EBKGD_PLTE_IDX; + + ctx->bkgd.plte_index = bkgd->plte_index; + } + + ctx->stored.bkgd = 1; + ctx->user.bkgd = 1; + + return 0; +} + +int spng_set_hist(spng_ctx *ctx, struct spng_hist *hist) +{ + SPNG_SET_CHUNK_BOILERPLATE(hist); + + if(!ctx->stored.plte) return SPNG_EHIST_NO_PLTE; + + ctx->hist = *hist; + + ctx->stored.hist = 1; + ctx->user.hist = 1; + + return 0; +} + +int spng_set_phys(spng_ctx *ctx, struct spng_phys *phys) +{ + SPNG_SET_CHUNK_BOILERPLATE(phys); + + if(check_phys(phys)) return SPNG_EPHYS; + + ctx->phys = *phys; + + ctx->stored.phys = 1; + ctx->user.phys = 1; + + return 0; +} + +int spng_set_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t n_splt) +{ + if(!n_splt) return 1; + SPNG_SET_CHUNK_BOILERPLATE(splt); + + uint32_t i; + for(i=0; i < n_splt; i++) + { + if(check_png_keyword(splt[i].name)) return SPNG_ESPLT_NAME; + if( !(splt[i].sample_depth == 8 || splt[i].sample_depth == 16) ) return SPNG_ESPLT_DEPTH; + } + + if(ctx->stored.splt && !ctx->user.splt) + { + for(i=0; i < ctx->n_splt; i++) + { + if(ctx->splt_list[i].entries != NULL) spng__free(ctx, ctx->splt_list[i].entries); + } + spng__free(ctx, ctx->splt_list); + } + + ctx->splt_list = splt; + ctx->n_splt = n_splt; + + ctx->stored.splt = 1; + ctx->user.splt = 1; + + return 0; +} + +int spng_set_time(spng_ctx *ctx, struct spng_time *time) +{ + SPNG_SET_CHUNK_BOILERPLATE(time); + + if(check_time(time)) return SPNG_ETIME; + + ctx->time = *time; + + ctx->stored.time = 1; + ctx->user.time = 1; + + return 0; +} + +int spng_set_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t n_chunks) +{ + if(!n_chunks) return 1; + SPNG_SET_CHUNK_BOILERPLATE(chunks); + + uint32_t i; + for(i=0; i < n_chunks; i++) + { + if(chunks[i].length > png_u32max) return SPNG_ECHUNK_STDLEN; + if(chunks[i].length && chunks[i].data == NULL) return 1; + + switch(chunks[i].location) + { + case SPNG_AFTER_IHDR: + case SPNG_AFTER_PLTE: + case SPNG_AFTER_IDAT: + break; + default: return 1; + } + } + + if(ctx->stored.unknown && !ctx->user.unknown) + { + for(i=0; i < ctx->n_chunks; i++) + { + spng__free(ctx, ctx->chunk_list[i].data); + } + spng__free(ctx, ctx->chunk_list); + } + + ctx->chunk_list = chunks; + ctx->n_chunks = n_chunks; + + ctx->stored.unknown = 1; + ctx->user.unknown = 1; + + return 0; +} + +int spng_set_offs(spng_ctx *ctx, struct spng_offs *offs) +{ + SPNG_SET_CHUNK_BOILERPLATE(offs); + + if(check_offs(offs)) return SPNG_EOFFS; + + ctx->offs = *offs; + + ctx->stored.offs = 1; + ctx->user.offs = 1; + + return 0; +} + +int spng_set_exif(spng_ctx *ctx, struct spng_exif *exif) +{ + SPNG_SET_CHUNK_BOILERPLATE(exif); + + if(check_exif(exif)) return SPNG_EEXIF; + + if(ctx->exif.data != NULL && !ctx->user.exif) spng__free(ctx, ctx->exif.data); + + ctx->exif = *exif; + + ctx->stored.exif = 1; + ctx->user.exif = 1; + + return 0; +} + +const char *spng_strerror(int err) +{ + switch(err) + { + case SPNG_IO_EOF: return "end of stream"; + case SPNG_IO_ERROR: return "stream error"; + case SPNG_OK: return "success"; + case SPNG_EINVAL: return "invalid argument"; + case SPNG_EMEM: return "out of memory"; + case SPNG_EOVERFLOW: return "arithmetic overflow"; + case SPNG_ESIGNATURE: return "invalid signature"; + case SPNG_EWIDTH: return "invalid image width"; + case SPNG_EHEIGHT: return "invalid image height"; + case SPNG_EUSER_WIDTH: return "image width exceeds user limit"; + case SPNG_EUSER_HEIGHT: return "image height exceeds user limit"; + case SPNG_EBIT_DEPTH: return "invalid bit depth"; + case SPNG_ECOLOR_TYPE: return "invalid color type"; + case SPNG_ECOMPRESSION_METHOD: return "invalid compression method"; + case SPNG_EFILTER_METHOD: return "invalid filter method"; + case SPNG_EINTERLACE_METHOD: return "invalid interlace method"; + case SPNG_EIHDR_SIZE: return "invalid IHDR chunk size"; + case SPNG_ENOIHDR: return "missing IHDR chunk"; + case SPNG_ECHUNK_POS: return "invalid chunk position"; + case SPNG_ECHUNK_SIZE: return "invalid chunk length"; + case SPNG_ECHUNK_CRC: return "invalid chunk checksum"; + case SPNG_ECHUNK_TYPE: return "invalid chunk type"; + case SPNG_ECHUNK_UNKNOWN_CRITICAL: return "unknown critical chunk"; + case SPNG_EDUP_PLTE: return "duplicate PLTE chunk"; + case SPNG_EDUP_CHRM: return "duplicate cHRM chunk"; + case SPNG_EDUP_GAMA: return "duplicate gAMA chunk"; + case SPNG_EDUP_ICCP: return "duplicate iCCP chunk"; + case SPNG_EDUP_SBIT: return "duplicate sBIT chunk"; + case SPNG_EDUP_SRGB: return "duplicate sRGB chunk"; + case SPNG_EDUP_BKGD: return "duplicate bKGD chunk"; + case SPNG_EDUP_HIST: return "duplicate hIST chunk"; + case SPNG_EDUP_TRNS: return "duplicate tRNS chunk"; + case SPNG_EDUP_PHYS: return "duplicate pHYs chunk"; + case SPNG_EDUP_TIME: return "duplicate tIME chunk"; + case SPNG_EDUP_OFFS: return "duplicate oFFs chunk"; + case SPNG_EDUP_EXIF: return "duplicate eXIf chunk"; + case SPNG_ECHRM: return "invalid cHRM chunk"; + case SPNG_EPLTE_IDX: return "invalid palette (PLTE) index"; + case SPNG_ETRNS_COLOR_TYPE: return "tRNS chunk with incompatible color type"; + case SPNG_ETRNS_NO_PLTE: return "missing palette (PLTE) for tRNS chunk"; + case SPNG_EGAMA: return "invalid gAMA chunk"; + case SPNG_EICCP_NAME: return "invalid iCCP profile name"; + case SPNG_EICCP_COMPRESSION_METHOD: return "invalid iCCP compression method"; + case SPNG_ESBIT: return "invalid sBIT chunk"; + case SPNG_ESRGB: return "invalid sRGB chunk"; + case SPNG_ETEXT: return "invalid tEXt chunk"; + case SPNG_ETEXT_KEYWORD: return "invalid tEXt keyword"; + case SPNG_EZTXT: return "invalid zTXt chunk"; + case SPNG_EZTXT_COMPRESSION_METHOD: return "invalid zTXt compression method"; + case SPNG_EITXT: return "invalid iTXt chunk"; + case SPNG_EITXT_COMPRESSION_FLAG: return "invalid iTXt compression flag"; + case SPNG_EITXT_COMPRESSION_METHOD: return "invalid iTXt compression method"; + case SPNG_EITXT_LANG_TAG: return "invalid iTXt language tag"; + case SPNG_EITXT_TRANSLATED_KEY: return "invalid iTXt translated key"; + case SPNG_EBKGD_NO_PLTE: return "missing palette for bKGD chunk"; + case SPNG_EBKGD_PLTE_IDX: return "invalid palette index for bKGD chunk"; + case SPNG_EHIST_NO_PLTE: return "missing palette for hIST chunk"; + case SPNG_EPHYS: return "invalid pHYs chunk"; + case SPNG_ESPLT_NAME: return "invalid suggested palette name"; + case SPNG_ESPLT_DUP_NAME: return "duplicate suggested palette (sPLT) name"; + case SPNG_ESPLT_DEPTH: return "invalid suggested palette (sPLT) sample depth"; + case SPNG_ETIME: return "invalid tIME chunk"; + case SPNG_EOFFS: return "invalid oFFs chunk"; + case SPNG_EEXIF: return "invalid eXIf chunk"; + case SPNG_EIDAT_TOO_SHORT: return "IDAT stream too short"; + case SPNG_EIDAT_STREAM: return "IDAT stream error"; + case SPNG_EZLIB: return "zlib error"; + case SPNG_EFILTER: return "invalid scanline filter"; + case SPNG_EBUFSIZ: return "output buffer too small"; + case SPNG_EIO: return "i/o error"; + case SPNG_EOF: return "end of file"; + case SPNG_EBUF_SET: return "buffer already set"; + case SPNG_EBADSTATE: return "non-recoverable state"; + case SPNG_EFMT: return "invalid format"; + case SPNG_EFLAGS: return "invalid flags"; + case SPNG_ECHUNKAVAIL: return "chunk not available"; + case SPNG_ENCODE_ONLY: return "encode only context"; + case SPNG_EOI: return "reached end-of-image state"; + case SPNG_ENOPLTE: return "missing PLTE for indexed image"; + case SPNG_ECHUNK_LIMITS: return "reached chunk/cache limits"; + case SPNG_EZLIB_INIT: return "zlib init error"; + case SPNG_ECHUNK_STDLEN: return "chunk exceeds maximum standard length"; + case SPNG_EINTERNAL: return "internal error"; + default: return "unknown error"; + } +} + +const char *spng_version_string(void) +{ + return SPNG_VERSION_STRING "-rc3"; +} + +#if defined(_MSC_VER) + #pragma warning(pop) +#endif + +/* The following SIMD optimizations are derived from libpng source code. */ + +/* +* PNG Reference Library License version 2 +* +* Copyright (c) 1995-2019 The PNG Reference Library Authors. +* Copyright (c) 2018-2019 Cosmin Truta. +* Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson. +* Copyright (c) 1996-1997 Andreas Dilger. +* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. +* +* The software is supplied "as is", without warranty of any kind, +* express or implied, including, without limitation, the warranties +* of merchantability, fitness for a particular purpose, title, and +* non-infringement. In no event shall the Copyright owners, or +* anyone distributing the software, be liable for any damages or +* other liability, whether in contract, tort or otherwise, arising +* from, out of, or in connection with the software, or the use or +* other dealings in the software, even if advised of the possibility +* of such damage. +* +* Permission is hereby granted to use, copy, modify, and distribute +* this software, or portions hereof, for any purpose, without fee, +* subject to the following restrictions: +* +* 1. The origin of this software must not be misrepresented; you +* must not claim that you wrote the original software. If you +* use this software in a product, an acknowledgment in the product +* documentation would be appreciated, but is not required. +* +* 2. Altered source versions must be plainly marked as such, and must +* not be misrepresented as being the original software. +* +* 3. This Copyright notice may not be removed or altered from any +* source or altered source distribution. +*/ + +#if defined(SPNG_X86) + +#ifndef SPNG_SSE + #define SPNG_SSE 1 +#endif + +#if defined(__GNUC__) && !defined(__clang__) + #if SPNG_SSE == 3 + #pragma GCC target("ssse3") + #elif SPNG_SSE == 4 + #pragma GCC target("sse4.1") + #else + #pragma GCC target("sse2") + #endif +#endif + +/* SSE2 optimised filter functions + * Derived from filter_neon_intrinsics.c + * + * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2016-2017 Glenn Randers-Pehrson + * Written by Mike Klein and Matt Sarett + * Derived from arm/filter_neon_intrinsics.c + * + * This code is derived from libpng source code. + * For conditions of distribution and use, see the disclaimer + * and license above. + */ + +#include +#include +#include + +/* Functions in this file look at most 3 pixels (a,b,c) to predict the 4th (d). + * They're positioned like this: + * prev: c b + * row: a d + * The Sub filter predicts d=a, Avg d=(a+b)/2, and Paeth predicts d to be + * whichever of a, b, or c is closest to p=a+b-c. + */ + +static __m128i load4(const void* p) +{ + int tmp; + memcpy(&tmp, p, sizeof(tmp)); + return _mm_cvtsi32_si128(tmp); +} + +static void store4(void* p, __m128i v) +{ + int tmp = _mm_cvtsi128_si32(v); + memcpy(p, &tmp, sizeof(int)); +} + +static __m128i load3(const void* p) +{ + uint32_t tmp = 0; + memcpy(&tmp, p, 3); + return _mm_cvtsi32_si128(tmp); +} + +static void store3(void* p, __m128i v) +{ + int tmp = _mm_cvtsi128_si32(v); + memcpy(p, &tmp, 3); +} + +static void defilter_sub3(size_t rowbytes, unsigned char *row) +{ + /* The Sub filter predicts each pixel as the previous pixel, a. + * There is no pixel to the left of the first pixel. It's encoded directly. + * That works with our main loop if we just say that left pixel was zero. + */ + size_t rb = rowbytes; + + __m128i a, d = _mm_setzero_si128(); + + while(rb >= 4) + { + a = d; d = load4(row); + d = _mm_add_epi8(d, a); + store3(row, d); + + row += 3; + rb -= 3; + } + + if(rb > 0) + { + a = d; d = load3(row); + d = _mm_add_epi8(d, a); + store3(row, d); + } +} + +static void defilter_sub4(size_t rowbytes, unsigned char *row) +{ + /* The Sub filter predicts each pixel as the previous pixel, a. + * There is no pixel to the left of the first pixel. It's encoded directly. + * That works with our main loop if we just say that left pixel was zero. + */ + size_t rb = rowbytes+4; + + __m128i a, d = _mm_setzero_si128(); + + while(rb > 4) + { + a = d; d = load4(row); + d = _mm_add_epi8(d, a); + store4(row, d); + + row += 4; + rb -= 4; + } +} + +static void defilter_avg3(size_t rowbytes, unsigned char *row, const unsigned char *prev) +{ + /* The Avg filter predicts each pixel as the (truncated) average of a and b. + * There's no pixel to the left of the first pixel. Luckily, it's + * predicted to be half of the pixel above it. So again, this works + * perfectly with our loop if we make sure a starts at zero. + */ + + size_t rb = rowbytes; + + const __m128i zero = _mm_setzero_si128(); + + __m128i b; + __m128i a, d = zero; + + while(rb >= 4) + { + __m128i avg; + b = load4(prev); + a = d; d = load4(row ); + + /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ + avg = _mm_avg_epu8(a,b); + /* ...but we can fix it up by subtracting off 1 if it rounded up. */ + avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a, b), + _mm_set1_epi8(1))); + d = _mm_add_epi8(d, avg); + store3(row, d); + + prev += 3; + row += 3; + rb -= 3; + } + + if(rb > 0) + { + __m128i avg; + b = load3(prev); + a = d; d = load3(row ); + + /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ + avg = _mm_avg_epu8(a, b); + /* ...but we can fix it up by subtracting off 1 if it rounded up. */ + avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a, b), + _mm_set1_epi8(1))); + + d = _mm_add_epi8(d, avg); + store3(row, d); + } +} + +static void defilter_avg4(size_t rowbytes, unsigned char *row, const unsigned char *prev) +{ + /* The Avg filter predicts each pixel as the (truncated) average of a and b. + * There's no pixel to the left of the first pixel. Luckily, it's + * predicted to be half of the pixel above it. So again, this works + * perfectly with our loop if we make sure a starts at zero. + */ + size_t rb = rowbytes+4; + + const __m128i zero = _mm_setzero_si128(); + __m128i b; + __m128i a, d = zero; + + while(rb > 4) + { + __m128i avg; + b = load4(prev); + a = d; d = load4(row ); + + /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ + avg = _mm_avg_epu8(a,b); + /* ...but we can fix it up by subtracting off 1 if it rounded up. */ + avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a, b), + _mm_set1_epi8(1))); + + d = _mm_add_epi8(d, avg); + store4(row, d); + + prev += 4; + row += 4; + rb -= 4; + } +} + +/* Returns |x| for 16-bit lanes. */ +#if (SPNG_SSE >= 3) && !defined(_MSC_VER) +__attribute__((target("ssse3"))) +#endif +static __m128i abs_i16(__m128i x) +{ +#if SPNG_SSE >= 3 + return _mm_abs_epi16(x); +#else + /* Read this all as, return x<0 ? -x : x. + * To negate two's complement, you flip all the bits then add 1. + */ + __m128i is_negative = _mm_cmplt_epi16(x, _mm_setzero_si128()); + + /* Flip negative lanes. */ + x = _mm_xor_si128(x, is_negative); + + /* +1 to negative lanes, else +0. */ + x = _mm_sub_epi16(x, is_negative); + return x; +#endif +} + +/* Bytewise c ? t : e. */ +static __m128i if_then_else(__m128i c, __m128i t, __m128i e) +{ +#if SPNG_SSE >= 4 + return _mm_blendv_epi8(e, t, c); +#else + return _mm_or_si128(_mm_and_si128(c, t), _mm_andnot_si128(c, e)); +#endif +} + +static void defilter_paeth3(size_t rowbytes, unsigned char *row, const unsigned char *prev) +{ + /* Paeth tries to predict pixel d using the pixel to the left of it, a, + * and two pixels from the previous row, b and c: + * prev: c b + * row: a d + * The Paeth function predicts d to be whichever of a, b, or c is nearest to + * p=a+b-c. + * + * The first pixel has no left context, and so uses an Up filter, p = b. + * This works naturally with our main loop's p = a+b-c if we force a and c + * to zero. + * Here we zero b and d, which become c and a respectively at the start of + * the loop. + */ + size_t rb = rowbytes; + const __m128i zero = _mm_setzero_si128(); + __m128i c, b = zero, + a, d = zero; + + while(rb >= 4) + { + /* It's easiest to do this math (particularly, deal with pc) with 16-bit + * intermediates. + */ + __m128i pa,pb,pc,smallest,nearest; + c = b; b = _mm_unpacklo_epi8(load4(prev), zero); + a = d; d = _mm_unpacklo_epi8(load4(row ), zero); + + /* (p-a) == (a+b-c - a) == (b-c) */ + + pa = _mm_sub_epi16(b, c); + + /* (p-b) == (a+b-c - b) == (a-c) */ + pb = _mm_sub_epi16(a, c); + + /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ + pc = _mm_add_epi16(pa, pb); + + pa = abs_i16(pa); /* |p-a| */ + pb = abs_i16(pb); /* |p-b| */ + pc = abs_i16(pc); /* |p-c| */ + + smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); + + /* Paeth breaks ties favoring a over b over c. */ + nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, + if_then_else(_mm_cmpeq_epi16(smallest, pb), b, c)); + + /* Note `_epi8`: we need addition to wrap modulo 255. */ + d = _mm_add_epi8(d, nearest); + store3(row, _mm_packus_epi16(d, d)); + + prev += 3; + row += 3; + rb -= 3; + } + + if(rb > 0) + { + /* It's easiest to do this math (particularly, deal with pc) with 16-bit + * intermediates. + */ + __m128i pa, pb, pc, smallest, nearest; + c = b; b = _mm_unpacklo_epi8(load3(prev), zero); + a = d; d = _mm_unpacklo_epi8(load3(row ), zero); + + /* (p-a) == (a+b-c - a) == (b-c) */ + pa = _mm_sub_epi16(b, c); + + /* (p-b) == (a+b-c - b) == (a-c) */ + pb = _mm_sub_epi16(a, c); + + /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ + pc = _mm_add_epi16(pa, pb); + + pa = abs_i16(pa); /* |p-a| */ + pb = abs_i16(pb); /* |p-b| */ + pc = abs_i16(pc); /* |p-c| */ + + smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); + + /* Paeth breaks ties favoring a over b over c. */ + nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, + if_then_else(_mm_cmpeq_epi16(smallest, pb), b, c)); + + /* Note `_epi8`: we need addition to wrap modulo 255. */ + d = _mm_add_epi8(d, nearest); + store3(row, _mm_packus_epi16(d, d)); + } +} + +static void defilter_paeth4(size_t rowbytes, unsigned char *row, const unsigned char *prev) +{ + /* Paeth tries to predict pixel d using the pixel to the left of it, a, + * and two pixels from the previous row, b and c: + * prev: c b + * row: a d + * The Paeth function predicts d to be whichever of a, b, or c is nearest to + * p=a+b-c. + * + * The first pixel has no left context, and so uses an Up filter, p = b. + * This works naturally with our main loop's p = a+b-c if we force a and c + * to zero. + * Here we zero b and d, which become c and a respectively at the start of + * the loop. + */ + size_t rb = rowbytes+4; + + const __m128i zero = _mm_setzero_si128(); + __m128i pa, pb, pc, smallest, nearest; + __m128i c, b = zero, + a, d = zero; + + while(rb > 4) + { + /* It's easiest to do this math (particularly, deal with pc) with 16-bit + * intermediates. + */ + c = b; b = _mm_unpacklo_epi8(load4(prev), zero); + a = d; d = _mm_unpacklo_epi8(load4(row ), zero); + + /* (p-a) == (a+b-c - a) == (b-c) */ + pa = _mm_sub_epi16(b, c); + + /* (p-b) == (a+b-c - b) == (a-c) */ + pb = _mm_sub_epi16(a, c); + + /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ + pc = _mm_add_epi16(pa, pb); + + pa = abs_i16(pa); /* |p-a| */ + pb = abs_i16(pb); /* |p-b| */ + pc = abs_i16(pc); /* |p-c| */ + + smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); + + /* Paeth breaks ties favoring a over b over c. */ + nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, + if_then_else(_mm_cmpeq_epi16(smallest, pb), b, c)); + + /* Note `_epi8`: we need addition to wrap modulo 255. */ + d = _mm_add_epi8(d, nearest); + store4(row, _mm_packus_epi16(d, d)); + + prev += 4; + row += 4; + rb -= 4; + } +} + +#endif /* SPNG_X86 */ + + +#if defined(SPNG_ARM) + +/* NEON optimised filter functions + * Derived from filter_neon_intrinsics.c + * + * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2014,2016 Glenn Randers-Pehrson + * Written by James Yu , October 2013. + * Based on filter_neon.S, written by Mans Rullgard, 2011. + * + * This code is derived from libpng source code. + * For conditions of distribution and use, see the disclaimer + * and license in this file. + */ + +#define png_aligncast(type, value) ((void*)(value)) +#define png_aligncastconst(type, value) ((const void*)(value)) + +/* libpng row pointers are not necessarily aligned to any particular boundary, + * however this code will only work with appropriate alignment. mips/mips_init.c + * checks for this (and will not compile unless it is done). This code uses + * variants of png_aligncast to avoid compiler warnings. + */ +#define png_ptr(type,pointer) png_aligncast(type *,pointer) +#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer) + +/* The following relies on a variable 'temp_pointer' being declared with type + * 'type'. This is written this way just to hide the GCC strict aliasing + * warning; note that the code is safe because there never is an alias between + * the input and output pointers. + */ +#define png_ldr(type,pointer)\ + (temp_pointer = png_ptr(type,pointer), *temp_pointer) + + +#if defined(_MSC_VER) && !defined(__clang__) && defined(_M_ARM64) + #include +#else + #include +#endif + +static void defilter_sub3(size_t rowbytes, unsigned char *row) +{ + unsigned char *rp = row; + unsigned char *rp_stop = row + rowbytes; + + uint8x16_t vtmp = vld1q_u8(rp); + uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp); + uint8x8x2_t vrp = *vrpt; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + for (; rp < rp_stop;) + { + uint8x8_t vtmp1, vtmp2; + uint32x2_t *temp_pointer; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vadd_u8(vdest.val[0], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vdest.val[2] = vadd_u8(vdest.val[1], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[2], vtmp1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t, &vtmp); + vrp = *vrpt; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +static void defilter_sub4(size_t rowbytes, unsigned char *row) +{ + unsigned char *rp = row; + unsigned char *rp_stop = row + rowbytes; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + for (; rp < rp_stop; rp += 16) + { + uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp)); + uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp); + uint8x8x4_t vrp = *vrpt; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]); + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } +} + +static void defilter_avg3(size_t rowbytes, unsigned char *row, const unsigned char *prev_row) +{ + unsigned char *rp = row; + const unsigned char *pp = prev_row; + unsigned char *rp_stop = row + rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + for (; rp < rp_stop; pp += 12) + { + uint8x8_t vtmp1, vtmp2, vtmp3; + + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6); + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp3); + + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +static void defilter_avg4(size_t rowbytes, unsigned char *row, const unsigned char *prev_row) +{ + unsigned char *rp = row; + unsigned char *rp_stop = row + rowbytes; + const unsigned char *pp = prev_row; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } +} + +static uint8x8_t paeth_arm(uint8x8_t a, uint8x8_t b, uint8x8_t c) +{ + uint8x8_t d, e; + uint16x8_t p1, pa, pb, pc; + + p1 = vaddl_u8(a, b); /* a + b */ + pc = vaddl_u8(c, c); /* c * 2 */ + pa = vabdl_u8(b, c); /* pa */ + pb = vabdl_u8(a, c); /* pb */ + pc = vabdq_u16(p1, pc); /* pc */ + + p1 = vcleq_u16(pa, pb); /* pa <= pb */ + pa = vcleq_u16(pa, pc); /* pa <= pc */ + pb = vcleq_u16(pb, pc); /* pb <= pc */ + + p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */ + + d = vmovn_u16(pb); + e = vmovn_u16(p1); + + d = vbsl_u8(d, b, c); + e = vbsl_u8(e, a, d); + + return e; +} + +static void defilter_paeth3(size_t rowbytes, unsigned char *row, const unsigned char *prev_row) +{ + unsigned char *rp = row; + const unsigned char *pp = prev_row; + unsigned char *rp_stop = row + rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + for (; rp < rp_stop; pp += 12) + { + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + uint8x8_t vtmp1, vtmp2, vtmp3; + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth_arm(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vdest.val[1] = paeth_arm(vdest.val[0], vtmp2, vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6); + vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6); + vdest.val[2] = paeth_arm(vdest.val[1], vtmp3, vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[3] = paeth_arm(vdest.val[2], vtmp2, vtmp3); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vlast = vtmp2; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +static void defilter_paeth4(size_t rowbytes, unsigned char *row, const unsigned char *prev_row) +{ + unsigned char *rp = row; + unsigned char *rp_stop = row + rowbytes; + const unsigned char *pp = prev_row; + + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + uint32x2x4_t vdest_val; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth_arm(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = paeth_arm(vdest.val[0], vpp.val[1], vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = paeth_arm(vdest.val[1], vpp.val[2], vpp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = paeth_arm(vdest.val[2], vpp.val[3], vpp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vlast = vpp.val[3]; + + vdest_val = png_ldr(uint32x2x4_t, &vdest); + vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); + } +} + +/* NEON optimised palette expansion functions + * Derived from palette_neon_intrinsics.c + * + * Copyright (c) 2018-2019 Cosmin Truta + * Copyright (c) 2017-2018 Arm Holdings. All rights reserved. + * Written by Richard Townsend , February 2017. + * + * This code is derived from libpng source code. + * For conditions of distribution and use, see the disclaimer + * and license in this file. + * + * Related: https://developer.arm.com/documentation/101964/latest/Color-palette-expansion + * + * The functions were refactored to iterate forward. + * + */ + +/* Expands a palettized row into RGBA8. */ +static uint32_t expand_palette_rgba8_neon(unsigned char *row, const unsigned char *scanline, const unsigned char *plte, uint32_t width) +{ + const uint32_t stride = 4; + const uint32_t *palette = (const uint32_t*)plte; + + if(width < stride) return 0; + + uint32_t i; + for(i=0; i < width; i += stride, scanline += stride, row += stride * 4) + { + uint32x4_t cur; + cur = vld1q_dup_u32 (palette + scanline[0]); + cur = vld1q_lane_u32(palette + scanline[1], cur, 1); + cur = vld1q_lane_u32(palette + scanline[2], cur, 2); + cur = vld1q_lane_u32(palette + scanline[3], cur, 3); + vst1q_u32((void*)row, cur); + } + + /* Remove the amount that wasn't processed. */ + if(i != width) i -= stride; + + return i; +} + +/* Expands a palettized row into RGB8. */ +static uint32_t expand_palette_rgb8_neon(unsigned char *row, const unsigned char *scanline, const unsigned char *plte, uint32_t width) +{ + const uint32_t stride = 8; + + if(width <= stride) return 0; + + uint32_t i; + for(i=0; i < width; i += stride, scanline += stride, row += stride * 3) + { + uint8x8x3_t cur; + cur = vld3_dup_u8 (plte + 3 * scanline[0]); + cur = vld3_lane_u8(plte + 3 * scanline[1], cur, 1); + cur = vld3_lane_u8(plte + 3 * scanline[2], cur, 2); + cur = vld3_lane_u8(plte + 3 * scanline[3], cur, 3); + cur = vld3_lane_u8(plte + 3 * scanline[4], cur, 4); + cur = vld3_lane_u8(plte + 3 * scanline[5], cur, 5); + cur = vld3_lane_u8(plte + 3 * scanline[6], cur, 6); + cur = vld3_lane_u8(plte + 3 * scanline[7], cur, 7); + vst3_u8((void*)row, cur); + } + + /* Remove the amount that wasn't processed. */ + if(i != width) i -= stride; + + return i; +} + +#endif /* SPNG_ARM */ diff --git a/src/thirdparty/libspng/spng.h b/src/thirdparty/libspng/spng.h new file mode 100755 index 0000000..5190530 --- /dev/null +++ b/src/thirdparty/libspng/spng.h @@ -0,0 +1,520 @@ +/* SPDX-License-Identifier: (BSD-2-Clause AND libpng-2.0) */ +#ifndef SPNG_H +#define SPNG_H + +#ifdef __cplusplus +extern "C" { +#endif + +#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(SPNG_STATIC) + #if defined(SPNG__BUILD) + #define SPNG_API __declspec(dllexport) + #else + #define SPNG_API __declspec(dllimport) + #endif +#else + #define SPNG_API +#endif + +#include +#include +#include + +#define SPNG_VERSION_MAJOR 0 +#define SPNG_VERSION_MINOR 7 +#define SPNG_VERSION_PATCH 0 + +enum spng_errno +{ + SPNG_IO_ERROR = -2, + SPNG_IO_EOF = -1, + SPNG_OK = 0, + SPNG_EINVAL, + SPNG_EMEM, + SPNG_EOVERFLOW, + SPNG_ESIGNATURE, + SPNG_EWIDTH, + SPNG_EHEIGHT, + SPNG_EUSER_WIDTH, + SPNG_EUSER_HEIGHT, + SPNG_EBIT_DEPTH, + SPNG_ECOLOR_TYPE, + SPNG_ECOMPRESSION_METHOD, + SPNG_EFILTER_METHOD, + SPNG_EINTERLACE_METHOD, + SPNG_EIHDR_SIZE, + SPNG_ENOIHDR, + SPNG_ECHUNK_POS, + SPNG_ECHUNK_SIZE, + SPNG_ECHUNK_CRC, + SPNG_ECHUNK_TYPE, + SPNG_ECHUNK_UNKNOWN_CRITICAL, + SPNG_EDUP_PLTE, + SPNG_EDUP_CHRM, + SPNG_EDUP_GAMA, + SPNG_EDUP_ICCP, + SPNG_EDUP_SBIT, + SPNG_EDUP_SRGB, + SPNG_EDUP_BKGD, + SPNG_EDUP_HIST, + SPNG_EDUP_TRNS, + SPNG_EDUP_PHYS, + SPNG_EDUP_TIME, + SPNG_EDUP_OFFS, + SPNG_EDUP_EXIF, + SPNG_ECHRM, + SPNG_EPLTE_IDX, + SPNG_ETRNS_COLOR_TYPE, + SPNG_ETRNS_NO_PLTE, + SPNG_EGAMA, + SPNG_EICCP_NAME, + SPNG_EICCP_COMPRESSION_METHOD, + SPNG_ESBIT, + SPNG_ESRGB, + SPNG_ETEXT, + SPNG_ETEXT_KEYWORD, + SPNG_EZTXT, + SPNG_EZTXT_COMPRESSION_METHOD, + SPNG_EITXT, + SPNG_EITXT_COMPRESSION_FLAG, + SPNG_EITXT_COMPRESSION_METHOD, + SPNG_EITXT_LANG_TAG, + SPNG_EITXT_TRANSLATED_KEY, + SPNG_EBKGD_NO_PLTE, + SPNG_EBKGD_PLTE_IDX, + SPNG_EHIST_NO_PLTE, + SPNG_EPHYS, + SPNG_ESPLT_NAME, + SPNG_ESPLT_DUP_NAME, + SPNG_ESPLT_DEPTH, + SPNG_ETIME, + SPNG_EOFFS, + SPNG_EEXIF, + SPNG_EIDAT_TOO_SHORT, + SPNG_EIDAT_STREAM, + SPNG_EZLIB, + SPNG_EFILTER, + SPNG_EBUFSIZ, + SPNG_EIO, + SPNG_EOF, + SPNG_EBUF_SET, + SPNG_EBADSTATE, + SPNG_EFMT, + SPNG_EFLAGS, + SPNG_ECHUNKAVAIL, + SPNG_ENCODE_ONLY, + SPNG_EOI, + SPNG_ENOPLTE, + SPNG_ECHUNK_LIMITS, + SPNG_EZLIB_INIT, + SPNG_ECHUNK_STDLEN, + SPNG_EINTERNAL, +}; + +enum spng_text_type +{ + SPNG_TEXT = 1, + SPNG_ZTXT = 2, + SPNG_ITXT = 3 +}; + +enum spng_color_type +{ + SPNG_COLOR_TYPE_GRAYSCALE = 0, + SPNG_COLOR_TYPE_TRUECOLOR = 2, + SPNG_COLOR_TYPE_INDEXED = 3, + SPNG_COLOR_TYPE_GRAYSCALE_ALPHA = 4, + SPNG_COLOR_TYPE_TRUECOLOR_ALPHA = 6 +}; + +enum spng_filter +{ + SPNG_FILTER_NONE = 0, + SPNG_FILTER_SUB = 1, + SPNG_FILTER_UP = 2, + SPNG_FILTER_AVERAGE = 3, + SPNG_FILTER_PAETH = 4 +}; + +enum spng_filter_choice +{ + SPNG_DISABLE_FILTERING = 0, + SPNG_FILTER_CHOICE_NONE = 8, + SPNG_FILTER_CHOICE_SUB = 16, + SPNG_FILTER_CHOICE_UP = 32, + SPNG_FILTER_CHOICE_AVG = 64, + SPNG_FILTER_CHOICE_PAETH = 128, + SPNG_FILTER_CHOICE_ALL = (8|16|32|64|128) +}; + +enum spng_interlace_method +{ + SPNG_INTERLACE_NONE = 0, + SPNG_INTERLACE_ADAM7 = 1 +}; + +/* Channels are always in byte-order */ +enum spng_format +{ + SPNG_FMT_RGBA8 = 1, + SPNG_FMT_RGBA16 = 2, + SPNG_FMT_RGB8 = 4, + + /* Partially implemented, see documentation */ + SPNG_FMT_GA8 = 16, + SPNG_FMT_GA16 = 32, + SPNG_FMT_G8 = 64, + + /* No conversion or scaling */ + SPNG_FMT_PNG = 256, /* host-endian */ + SPNG_FMT_RAW = 512 /* big-endian */ +}; + +enum spng_ctx_flags +{ + SPNG_CTX_IGNORE_ADLER32 = 1 /* Ignore checksum in DEFLATE streams */ +}; + +enum spng_decode_flags +{ + SPNG_DECODE_USE_TRNS = 1, /* Deprecated */ + SPNG_DECODE_USE_GAMA = 2, /* Deprecated */ + SPNG_DECODE_USE_SBIT = 8, /* Undocumented */ + + SPNG_DECODE_TRNS = 1, /* Apply transparency */ + SPNG_DECODE_GAMMA = 2, /* Apply gamma correction */ + SPNG_DECODE_PROGRESSIVE = 256 /* Initialize for progressive reads */ +}; + +enum spng_crc_action +{ + /* Default for critical chunks */ + SPNG_CRC_ERROR = 0, + + /* Discard chunk, invalid for critical chunks. + Since v0.6.2: default for ancillary chunks */ + SPNG_CRC_DISCARD = 1, + + /* Ignore and don't calculate checksum. + Since v0.6.2: also ignores checksums in DEFLATE streams */ + SPNG_CRC_USE = 2 +}; + +enum spng_encode_flags +{ + SPNG_ENCODE_PROGRESSIVE = 1, /* Initialize for progressive writes */ +}; + +struct spng_ihdr +{ + uint32_t width; + uint32_t height; + uint8_t bit_depth; + uint8_t color_type; + uint8_t compression_method; + uint8_t filter_method; + uint8_t interlace_method; +}; + +struct spng_plte_entry +{ + uint8_t red; + uint8_t green; + uint8_t blue; + + uint8_t alpha; /* Reserved for internal use */ +}; + +struct spng_plte +{ + uint32_t n_entries; + struct spng_plte_entry entries[256]; +}; + +struct spng_trns +{ + uint16_t gray; + + uint16_t red; + uint16_t green; + uint16_t blue; + + uint32_t n_type3_entries; + uint8_t type3_alpha[256]; +}; + +struct spng_chrm_int +{ + uint32_t white_point_x; + uint32_t white_point_y; + uint32_t red_x; + uint32_t red_y; + uint32_t green_x; + uint32_t green_y; + uint32_t blue_x; + uint32_t blue_y; +}; + +struct spng_chrm +{ + double white_point_x; + double white_point_y; + double red_x; + double red_y; + double green_x; + double green_y; + double blue_x; + double blue_y; +}; + +struct spng_iccp +{ + char profile_name[80]; + size_t profile_len; + char *profile; +}; + +struct spng_sbit +{ + uint8_t grayscale_bits; + uint8_t red_bits; + uint8_t green_bits; + uint8_t blue_bits; + uint8_t alpha_bits; +}; + +struct spng_text +{ + char keyword[80]; + int type; + + size_t length; + char *text; + + uint8_t compression_flag; /* iTXt only */ + uint8_t compression_method; /* iTXt, ztXt only */ + char *language_tag; /* iTXt only */ + char *translated_keyword; /* iTXt only */ +}; + +struct spng_bkgd +{ + uint16_t gray; /* Only for gray/gray alpha */ + uint16_t red; + uint16_t green; + uint16_t blue; + uint16_t plte_index; /* Only for indexed color */ +}; + +struct spng_hist +{ + uint16_t frequency[256]; +}; + +struct spng_phys +{ + uint32_t ppu_x, ppu_y; + uint8_t unit_specifier; +}; + +struct spng_splt_entry +{ + uint16_t red; + uint16_t green; + uint16_t blue; + uint16_t alpha; + uint16_t frequency; +}; + +struct spng_splt +{ + char name[80]; + uint8_t sample_depth; + uint32_t n_entries; + struct spng_splt_entry *entries; +}; + +struct spng_time +{ + uint16_t year; + uint8_t month; + uint8_t day; + uint8_t hour; + uint8_t minute; + uint8_t second; +}; + +struct spng_offs +{ + int32_t x, y; + uint8_t unit_specifier; +}; + +struct spng_exif +{ + size_t length; + char *data; +}; + +struct spng_chunk +{ + size_t offset; + uint32_t length; + uint8_t type[4]; + uint32_t crc; +}; + +enum spng_location +{ + SPNG_AFTER_IHDR = 1, + SPNG_AFTER_PLTE = 2, + SPNG_AFTER_IDAT = 8, +}; + +struct spng_unknown_chunk +{ + uint8_t type[4]; + size_t length; + void *data; + enum spng_location location; +}; + +enum spng_option +{ + SPNG_KEEP_UNKNOWN_CHUNKS = 1, + + SPNG_IMG_COMPRESSION_LEVEL, + SPNG_IMG_WINDOW_BITS, + SPNG_IMG_MEM_LEVEL, + SPNG_IMG_COMPRESSION_STRATEGY, + + SPNG_TEXT_COMPRESSION_LEVEL, + SPNG_TEXT_WINDOW_BITS, + SPNG_TEXT_MEM_LEVEL, + SPNG_TEXT_COMPRESSION_STRATEGY, + + SPNG_FILTER_CHOICE, +}; + +typedef void* spng_malloc_fn(size_t size); +typedef void* spng_realloc_fn(void* ptr, size_t size); +typedef void* spng_calloc_fn(size_t count, size_t size); +typedef void spng_free_fn(void* ptr); + +struct spng_alloc +{ + spng_malloc_fn *malloc_fn; + spng_realloc_fn *realloc_fn; + spng_calloc_fn *calloc_fn; + spng_free_fn *free_fn; +}; + +struct spng_row_info +{ + uint32_t scanline_idx; + uint32_t row_num; /* deinterlaced row index */ + int pass; + uint8_t filter; +}; + +typedef struct spng_ctx spng_ctx; + +typedef int spng_read_fn(spng_ctx *ctx, void *user, void *dest, size_t length); +typedef int spng_write_fn(spng_ctx *ctx, void *user, void *src, size_t length); + +typedef int spng_rw_fn(spng_ctx *ctx, void *user, void *dst_src, size_t length); + +SPNG_API spng_ctx *spng_ctx_new(int flags); +SPNG_API spng_ctx *spng_ctx_new2(struct spng_alloc *alloc, int flags); +SPNG_API void spng_ctx_free(spng_ctx *ctx); + +SPNG_API int spng_set_png_buffer(spng_ctx *ctx, const void *buf, size_t size); +SPNG_API int spng_set_png_stream(spng_ctx *ctx, spng_rw_fn *rw_func, void *user); +SPNG_API int spng_set_png_file(spng_ctx *ctx, FILE *file); + +SPNG_API void *spng_get_png_buffer(spng_ctx *ctx, size_t *len, int *error); + +SPNG_API int spng_set_image_limits(spng_ctx *ctx, uint32_t width, uint32_t height); +SPNG_API int spng_get_image_limits(spng_ctx *ctx, uint32_t *width, uint32_t *height); + +SPNG_API int spng_set_chunk_limits(spng_ctx *ctx, size_t chunk_size, size_t cache_size); +SPNG_API int spng_get_chunk_limits(spng_ctx *ctx, size_t *chunk_size, size_t *cache_size); + +SPNG_API int spng_set_crc_action(spng_ctx *ctx, int critical, int ancillary); + +SPNG_API int spng_set_option(spng_ctx *ctx, enum spng_option option, int value); +SPNG_API int spng_get_option(spng_ctx *ctx, enum spng_option option, int *value); + +SPNG_API int spng_decoded_image_size(spng_ctx *ctx, int fmt, size_t *len); + +/* Decode */ +SPNG_API int spng_decode_image(spng_ctx *ctx, void *out, size_t len, int fmt, int flags); + +/* Progressive decode */ +SPNG_API int spng_decode_scanline(spng_ctx *ctx, void *out, size_t len); +SPNG_API int spng_decode_row(spng_ctx *ctx, void *out, size_t len); + +/* Encode/decode */ +SPNG_API int spng_get_row_info(spng_ctx *ctx, struct spng_row_info *row_info); + +/* Encode */ +SPNG_API int spng_encode_image(spng_ctx *ctx, const void *img, size_t len, int fmt, int flags); + +/* Progressive encode */ +SPNG_API int spng_encode_scanline(spng_ctx *ctx, const void *scanline, size_t len); +SPNG_API int spng_encode_row(spng_ctx *ctx, const void *row, size_t len); + +SPNG_API int spng_get_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr); +SPNG_API int spng_get_plte(spng_ctx *ctx, struct spng_plte *plte); +SPNG_API int spng_get_trns(spng_ctx *ctx, struct spng_trns *trns); +SPNG_API int spng_get_chrm(spng_ctx *ctx, struct spng_chrm *chrm); +SPNG_API int spng_get_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm_int); +SPNG_API int spng_get_gama(spng_ctx *ctx, double *gamma); +SPNG_API int spng_get_gama_int(spng_ctx *ctx, uint32_t *gama_int); +SPNG_API int spng_get_iccp(spng_ctx *ctx, struct spng_iccp *iccp); +SPNG_API int spng_get_sbit(spng_ctx *ctx, struct spng_sbit *sbit); +SPNG_API int spng_get_srgb(spng_ctx *ctx, uint8_t *rendering_intent); +SPNG_API int spng_get_text(spng_ctx *ctx, struct spng_text *text, uint32_t *n_text); +SPNG_API int spng_get_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd); +SPNG_API int spng_get_hist(spng_ctx *ctx, struct spng_hist *hist); +SPNG_API int spng_get_phys(spng_ctx *ctx, struct spng_phys *phys); +SPNG_API int spng_get_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t *n_splt); +SPNG_API int spng_get_time(spng_ctx *ctx, struct spng_time *time); +SPNG_API int spng_get_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t *n_chunks); + +/* Official extensions */ +SPNG_API int spng_get_offs(spng_ctx *ctx, struct spng_offs *offs); +SPNG_API int spng_get_exif(spng_ctx *ctx, struct spng_exif *exif); + + +SPNG_API int spng_set_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr); +SPNG_API int spng_set_plte(spng_ctx *ctx, struct spng_plte *plte); +SPNG_API int spng_set_trns(spng_ctx *ctx, struct spng_trns *trns); +SPNG_API int spng_set_chrm(spng_ctx *ctx, struct spng_chrm *chrm); +SPNG_API int spng_set_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm_int); +SPNG_API int spng_set_gama(spng_ctx *ctx, double gamma); +SPNG_API int spng_set_gama_int(spng_ctx *ctx, uint32_t gamma); +SPNG_API int spng_set_iccp(spng_ctx *ctx, struct spng_iccp *iccp); +SPNG_API int spng_set_sbit(spng_ctx *ctx, struct spng_sbit *sbit); +SPNG_API int spng_set_srgb(spng_ctx *ctx, uint8_t rendering_intent); +SPNG_API int spng_set_text(spng_ctx *ctx, struct spng_text *text, uint32_t n_text); +SPNG_API int spng_set_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd); +SPNG_API int spng_set_hist(spng_ctx *ctx, struct spng_hist *hist); +SPNG_API int spng_set_phys(spng_ctx *ctx, struct spng_phys *phys); +SPNG_API int spng_set_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t n_splt); +SPNG_API int spng_set_time(spng_ctx *ctx, struct spng_time *time); +SPNG_API int spng_set_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t n_chunks); + +/* Official extensions */ +SPNG_API int spng_set_offs(spng_ctx *ctx, struct spng_offs *offs); +SPNG_API int spng_set_exif(spng_ctx *ctx, struct spng_exif *exif); + + +SPNG_API const char *spng_strerror(int err); +SPNG_API const char *spng_version_string(void); + +#ifdef __cplusplus +} +#endif + +#endif /* SPNG_H */ diff --git a/src/thirdparty/miniz/miniz.c b/src/thirdparty/miniz/miniz.c new file mode 100755 index 0000000..416e298 --- /dev/null +++ b/src/thirdparty/miniz/miniz.c @@ -0,0 +1,7657 @@ +/************************************************************************** + * + * Copyright 2013-2014 RAD Game Tools and Valve Software + * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + **************************************************************************/ + +#include "miniz.h" + +typedef unsigned char mz_validate_uint16[sizeof(mz_uint16) == 2 ? 1 : -1]; +typedef unsigned char mz_validate_uint32[sizeof(mz_uint32) == 4 ? 1 : -1]; +typedef unsigned char mz_validate_uint64[sizeof(mz_uint64) == 8 ? 1 : -1]; + +#ifdef __cplusplus +extern "C" { +#endif + +/* ------------------- zlib-style API's */ + +mz_ulong mz_adler32(mz_ulong adler, const unsigned char *ptr, size_t buf_len) +{ + mz_uint32 i, s1 = (mz_uint32)(adler & 0xffff), s2 = (mz_uint32)(adler >> 16); + size_t block_len = buf_len % 5552; + if (!ptr) + return MZ_ADLER32_INIT; + while (buf_len) + { + for (i = 0; i + 7 < block_len; i += 8, ptr += 8) + { + s1 += ptr[0], s2 += s1; + s1 += ptr[1], s2 += s1; + s1 += ptr[2], s2 += s1; + s1 += ptr[3], s2 += s1; + s1 += ptr[4], s2 += s1; + s1 += ptr[5], s2 += s1; + s1 += ptr[6], s2 += s1; + s1 += ptr[7], s2 += s1; + } + for (; i < block_len; ++i) + s1 += *ptr++, s2 += s1; + s1 %= 65521U, s2 %= 65521U; + buf_len -= block_len; + block_len = 5552; + } + return (s2 << 16) + s1; +} + +/* Karl Malbrain's compact CRC-32. See "A compact CCITT crc16 and crc32 C implementation that balances processor cache usage against speed": http://www.geocities.com/malbrain/ */ +#if 0 + mz_ulong mz_crc32(mz_ulong crc, const mz_uint8 *ptr, size_t buf_len) + { + static const mz_uint32 s_crc32[16] = { 0, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, + 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c }; + mz_uint32 crcu32 = (mz_uint32)crc; + if (!ptr) + return MZ_CRC32_INIT; + crcu32 = ~crcu32; + while (buf_len--) + { + mz_uint8 b = *ptr++; + crcu32 = (crcu32 >> 4) ^ s_crc32[(crcu32 & 0xF) ^ (b & 0xF)]; + crcu32 = (crcu32 >> 4) ^ s_crc32[(crcu32 & 0xF) ^ (b >> 4)]; + } + return ~crcu32; + } +#else +/* Faster, but larger CPU cache footprint. + */ +mz_ulong mz_crc32(mz_ulong crc, const mz_uint8 *ptr, size_t buf_len) +{ + static const mz_uint32 s_crc_table[256] = + { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, + 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, + 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, + 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, + 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, + 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, + 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, + 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, + 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, + 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, + 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, + 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, + 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, + 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, + 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, + 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, + 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, + 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, + 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, + 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, + 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, + 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, + 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, + 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, + 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, + 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, + 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, + 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, + 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, + 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, + 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, + 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, + 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D + }; + + mz_uint32 crc32 = (mz_uint32)crc ^ 0xFFFFFFFF; + const mz_uint8 *pByte_buf = (const mz_uint8 *)ptr; + + while (buf_len >= 4) + { + crc32 = (crc32 >> 8) ^ s_crc_table[(crc32 ^ pByte_buf[0]) & 0xFF]; + crc32 = (crc32 >> 8) ^ s_crc_table[(crc32 ^ pByte_buf[1]) & 0xFF]; + crc32 = (crc32 >> 8) ^ s_crc_table[(crc32 ^ pByte_buf[2]) & 0xFF]; + crc32 = (crc32 >> 8) ^ s_crc_table[(crc32 ^ pByte_buf[3]) & 0xFF]; + pByte_buf += 4; + buf_len -= 4; + } + + while (buf_len) + { + crc32 = (crc32 >> 8) ^ s_crc_table[(crc32 ^ pByte_buf[0]) & 0xFF]; + ++pByte_buf; + --buf_len; + } + + return ~crc32; +} +#endif + +void mz_free(void *p) +{ + MZ_FREE(p); +} + +void *miniz_def_alloc_func(void *opaque, size_t items, size_t size) +{ + (void)opaque, (void)items, (void)size; + return MZ_MALLOC(items * size); +} +void miniz_def_free_func(void *opaque, void *address) +{ + (void)opaque, (void)address; + MZ_FREE(address); +} +void *miniz_def_realloc_func(void *opaque, void *address, size_t items, size_t size) +{ + (void)opaque, (void)address, (void)items, (void)size; + return MZ_REALLOC(address, items * size); +} + +const char *mz_version(void) +{ + return MZ_VERSION; +} + +#ifndef MINIZ_NO_ZLIB_APIS + +int mz_deflateInit(mz_streamp pStream, int level) +{ + return mz_deflateInit2(pStream, level, MZ_DEFLATED, MZ_DEFAULT_WINDOW_BITS, 9, MZ_DEFAULT_STRATEGY); +} + +int mz_deflateInit2(mz_streamp pStream, int level, int method, int window_bits, int mem_level, int strategy) +{ + tdefl_compressor *pComp; + mz_uint comp_flags = TDEFL_COMPUTE_ADLER32 | tdefl_create_comp_flags_from_zip_params(level, window_bits, strategy); + + if (!pStream) + return MZ_STREAM_ERROR; + if ((method != MZ_DEFLATED) || ((mem_level < 1) || (mem_level > 9)) || ((window_bits != MZ_DEFAULT_WINDOW_BITS) && (-window_bits != MZ_DEFAULT_WINDOW_BITS))) + return MZ_PARAM_ERROR; + + pStream->data_type = 0; + pStream->adler = MZ_ADLER32_INIT; + pStream->msg = NULL; + pStream->reserved = 0; + pStream->total_in = 0; + pStream->total_out = 0; + if (!pStream->zalloc) + pStream->zalloc = miniz_def_alloc_func; + if (!pStream->zfree) + pStream->zfree = miniz_def_free_func; + + pComp = (tdefl_compressor *)pStream->zalloc(pStream->opaque, 1, sizeof(tdefl_compressor)); + if (!pComp) + return MZ_MEM_ERROR; + + pStream->state = (struct mz_internal_state *)pComp; + + if (tdefl_init(pComp, NULL, NULL, comp_flags) != TDEFL_STATUS_OKAY) + { + mz_deflateEnd(pStream); + return MZ_PARAM_ERROR; + } + + return MZ_OK; +} + +int mz_deflateReset(mz_streamp pStream) +{ + if ((!pStream) || (!pStream->state) || (!pStream->zalloc) || (!pStream->zfree)) + return MZ_STREAM_ERROR; + pStream->total_in = pStream->total_out = 0; + tdefl_init((tdefl_compressor *)pStream->state, NULL, NULL, ((tdefl_compressor *)pStream->state)->m_flags); + return MZ_OK; +} + +int mz_deflate(mz_streamp pStream, int flush) +{ + size_t in_bytes, out_bytes; + mz_ulong orig_total_in, orig_total_out; + int mz_status = MZ_OK; + + if ((!pStream) || (!pStream->state) || (flush < 0) || (flush > MZ_FINISH) || (!pStream->next_out)) + return MZ_STREAM_ERROR; + if (!pStream->avail_out) + return MZ_BUF_ERROR; + + if (flush == MZ_PARTIAL_FLUSH) + flush = MZ_SYNC_FLUSH; + + if (((tdefl_compressor *)pStream->state)->m_prev_return_status == TDEFL_STATUS_DONE) + return (flush == MZ_FINISH) ? MZ_STREAM_END : MZ_BUF_ERROR; + + orig_total_in = pStream->total_in; + orig_total_out = pStream->total_out; + for (;;) + { + tdefl_status defl_status; + in_bytes = pStream->avail_in; + out_bytes = pStream->avail_out; + + defl_status = tdefl_compress((tdefl_compressor *)pStream->state, pStream->next_in, &in_bytes, pStream->next_out, &out_bytes, (tdefl_flush)flush); + pStream->next_in += (mz_uint)in_bytes; + pStream->avail_in -= (mz_uint)in_bytes; + pStream->total_in += (mz_uint)in_bytes; + pStream->adler = tdefl_get_adler32((tdefl_compressor *)pStream->state); + + pStream->next_out += (mz_uint)out_bytes; + pStream->avail_out -= (mz_uint)out_bytes; + pStream->total_out += (mz_uint)out_bytes; + + if (defl_status < 0) + { + mz_status = MZ_STREAM_ERROR; + break; + } + else if (defl_status == TDEFL_STATUS_DONE) + { + mz_status = MZ_STREAM_END; + break; + } + else if (!pStream->avail_out) + break; + else if ((!pStream->avail_in) && (flush != MZ_FINISH)) + { + if ((flush) || (pStream->total_in != orig_total_in) || (pStream->total_out != orig_total_out)) + break; + return MZ_BUF_ERROR; /* Can't make forward progress without some input. + */ + } + } + return mz_status; +} + +int mz_deflateEnd(mz_streamp pStream) +{ + if (!pStream) + return MZ_STREAM_ERROR; + if (pStream->state) + { + pStream->zfree(pStream->opaque, pStream->state); + pStream->state = NULL; + } + return MZ_OK; +} + +mz_ulong mz_deflateBound(mz_streamp pStream, mz_ulong source_len) +{ + (void)pStream; + /* This is really over conservative. (And lame, but it's actually pretty tricky to compute a true upper bound given the way tdefl's blocking works.) */ + return MZ_MAX(128 + (source_len * 110) / 100, 128 + source_len + ((source_len / (31 * 1024)) + 1) * 5); +} + +int mz_compress2(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len, int level) +{ + int status; + mz_stream stream; + memset(&stream, 0, sizeof(stream)); + + /* In case mz_ulong is 64-bits (argh I hate longs). */ + if ((source_len | *pDest_len) > 0xFFFFFFFFU) + return MZ_PARAM_ERROR; + + stream.next_in = pSource; + stream.avail_in = (mz_uint32)source_len; + stream.next_out = pDest; + stream.avail_out = (mz_uint32)*pDest_len; + + status = mz_deflateInit(&stream, level); + if (status != MZ_OK) + return status; + + status = mz_deflate(&stream, MZ_FINISH); + if (status != MZ_STREAM_END) + { + mz_deflateEnd(&stream); + return (status == MZ_OK) ? MZ_BUF_ERROR : status; + } + + *pDest_len = stream.total_out; + return mz_deflateEnd(&stream); +} + +int mz_compress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len) +{ + return mz_compress2(pDest, pDest_len, pSource, source_len, MZ_DEFAULT_COMPRESSION); +} + +mz_ulong mz_compressBound(mz_ulong source_len) +{ + return mz_deflateBound(NULL, source_len); +} + +typedef struct +{ + tinfl_decompressor m_decomp; + mz_uint m_dict_ofs, m_dict_avail, m_first_call, m_has_flushed; + int m_window_bits; + mz_uint8 m_dict[TINFL_LZ_DICT_SIZE]; + tinfl_status m_last_status; +} inflate_state; + +int mz_inflateInit2(mz_streamp pStream, int window_bits) +{ + inflate_state *pDecomp; + if (!pStream) + return MZ_STREAM_ERROR; + if ((window_bits != MZ_DEFAULT_WINDOW_BITS) && (-window_bits != MZ_DEFAULT_WINDOW_BITS)) + return MZ_PARAM_ERROR; + + pStream->data_type = 0; + pStream->adler = 0; + pStream->msg = NULL; + pStream->total_in = 0; + pStream->total_out = 0; + pStream->reserved = 0; + if (!pStream->zalloc) + pStream->zalloc = miniz_def_alloc_func; + if (!pStream->zfree) + pStream->zfree = miniz_def_free_func; + + pDecomp = (inflate_state *)pStream->zalloc(pStream->opaque, 1, sizeof(inflate_state)); + if (!pDecomp) + return MZ_MEM_ERROR; + + pStream->state = (struct mz_internal_state *)pDecomp; + + tinfl_init(&pDecomp->m_decomp); + + pDecomp->m_dict_ofs = 0; + pDecomp->m_dict_avail = 0; + pDecomp->m_last_status = TINFL_STATUS_NEEDS_MORE_INPUT; + pDecomp->m_first_call = 1; + pDecomp->m_has_flushed = 0; + pDecomp->m_window_bits = window_bits; + + return MZ_OK; +} + +int mz_inflateInit(mz_streamp pStream) +{ + return mz_inflateInit2(pStream, MZ_DEFAULT_WINDOW_BITS); +} + +int mz_inflateReset(mz_streamp pStream) +{ + inflate_state *pDecomp; + if (!pStream) + return MZ_STREAM_ERROR; + + pStream->data_type = 0; + pStream->adler = 0; + pStream->msg = NULL; + pStream->total_in = 0; + pStream->total_out = 0; + pStream->reserved = 0; + + pDecomp = (inflate_state *)pStream->state; + + tinfl_init(&pDecomp->m_decomp); + pDecomp->m_dict_ofs = 0; + pDecomp->m_dict_avail = 0; + pDecomp->m_last_status = TINFL_STATUS_NEEDS_MORE_INPUT; + pDecomp->m_first_call = 1; + pDecomp->m_has_flushed = 0; + /* pDecomp->m_window_bits = window_bits */; + + return MZ_OK; +} + +int mz_inflate(mz_streamp pStream, int flush) +{ + inflate_state *pState; + mz_uint n, first_call, decomp_flags = TINFL_FLAG_COMPUTE_ADLER32; + size_t in_bytes, out_bytes, orig_avail_in; + tinfl_status status; + + if ((!pStream) || (!pStream->state)) + return MZ_STREAM_ERROR; + if (flush == MZ_PARTIAL_FLUSH) + flush = MZ_SYNC_FLUSH; + if ((flush) && (flush != MZ_SYNC_FLUSH) && (flush != MZ_FINISH)) + return MZ_STREAM_ERROR; + + pState = (inflate_state *)pStream->state; + if (pState->m_window_bits > 0) + decomp_flags |= TINFL_FLAG_PARSE_ZLIB_HEADER; + orig_avail_in = pStream->avail_in; + + first_call = pState->m_first_call; + pState->m_first_call = 0; + if (pState->m_last_status < 0) + return MZ_DATA_ERROR; + + if (pState->m_has_flushed && (flush != MZ_FINISH)) + return MZ_STREAM_ERROR; + pState->m_has_flushed |= (flush == MZ_FINISH); + + if ((flush == MZ_FINISH) && (first_call)) + { + /* MZ_FINISH on the first call implies that the input and output buffers are large enough to hold the entire compressed/decompressed file. */ + decomp_flags |= TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF; + in_bytes = pStream->avail_in; + out_bytes = pStream->avail_out; + status = tinfl_decompress(&pState->m_decomp, pStream->next_in, &in_bytes, pStream->next_out, pStream->next_out, &out_bytes, decomp_flags); + pState->m_last_status = status; + pStream->next_in += (mz_uint)in_bytes; + pStream->avail_in -= (mz_uint)in_bytes; + pStream->total_in += (mz_uint)in_bytes; + pStream->adler = tinfl_get_adler32(&pState->m_decomp); + pStream->next_out += (mz_uint)out_bytes; + pStream->avail_out -= (mz_uint)out_bytes; + pStream->total_out += (mz_uint)out_bytes; + + if (status < 0) + return MZ_DATA_ERROR; + else if (status != TINFL_STATUS_DONE) + { + pState->m_last_status = TINFL_STATUS_FAILED; + return MZ_BUF_ERROR; + } + return MZ_STREAM_END; + } + /* flush != MZ_FINISH then we must assume there's more input. */ + if (flush != MZ_FINISH) + decomp_flags |= TINFL_FLAG_HAS_MORE_INPUT; + + if (pState->m_dict_avail) + { + n = MZ_MIN(pState->m_dict_avail, pStream->avail_out); + memcpy(pStream->next_out, pState->m_dict + pState->m_dict_ofs, n); + pStream->next_out += n; + pStream->avail_out -= n; + pStream->total_out += n; + pState->m_dict_avail -= n; + pState->m_dict_ofs = (pState->m_dict_ofs + n) & (TINFL_LZ_DICT_SIZE - 1); + return ((pState->m_last_status == TINFL_STATUS_DONE) && (!pState->m_dict_avail)) ? MZ_STREAM_END : MZ_OK; + } + + for (;;) + { + in_bytes = pStream->avail_in; + out_bytes = TINFL_LZ_DICT_SIZE - pState->m_dict_ofs; + status = tinfl_decompress(&pState->m_decomp, pStream->next_in, &in_bytes, pState->m_dict, pState->m_dict + pState->m_dict_ofs, &out_bytes, decomp_flags); + pState->m_last_status = status; + + pStream->next_in += (mz_uint)in_bytes; + pStream->avail_in -= (mz_uint)in_bytes; + pStream->total_in += (mz_uint)in_bytes; + pStream->adler = tinfl_get_adler32(&pState->m_decomp); + + pState->m_dict_avail = (mz_uint)out_bytes; + + n = MZ_MIN(pState->m_dict_avail, pStream->avail_out); + memcpy(pStream->next_out, pState->m_dict + pState->m_dict_ofs, n); + pStream->next_out += n; + pStream->avail_out -= n; + pStream->total_out += n; + pState->m_dict_avail -= n; + pState->m_dict_ofs = (pState->m_dict_ofs + n) & (TINFL_LZ_DICT_SIZE - 1); + + if (status < 0) + return MZ_DATA_ERROR; /* Stream is corrupted (there could be some uncompressed data left in the output dictionary - oh well). */ + else if ((status == TINFL_STATUS_NEEDS_MORE_INPUT) && (!orig_avail_in)) + return MZ_BUF_ERROR; /* Signal caller that we can't make forward progress without supplying more input or by setting flush to MZ_FINISH. */ + else if (flush == MZ_FINISH) + { + /* The output buffer MUST be large to hold the remaining uncompressed data when flush==MZ_FINISH. */ + if (status == TINFL_STATUS_DONE) + return pState->m_dict_avail ? MZ_BUF_ERROR : MZ_STREAM_END; + /* status here must be TINFL_STATUS_HAS_MORE_OUTPUT, which means there's at least 1 more byte on the way. If there's no more room left in the output buffer then something is wrong. */ + else if (!pStream->avail_out) + return MZ_BUF_ERROR; + } + else if ((status == TINFL_STATUS_DONE) || (!pStream->avail_in) || (!pStream->avail_out) || (pState->m_dict_avail)) + break; + } + + return ((status == TINFL_STATUS_DONE) && (!pState->m_dict_avail)) ? MZ_STREAM_END : MZ_OK; +} + +int mz_inflateEnd(mz_streamp pStream) +{ + if (!pStream) + return MZ_STREAM_ERROR; + if (pStream->state) + { + pStream->zfree(pStream->opaque, pStream->state); + pStream->state = NULL; + } + return MZ_OK; +} + +int mz_uncompress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len) +{ + mz_stream stream; + int status; + memset(&stream, 0, sizeof(stream)); + + /* In case mz_ulong is 64-bits (argh I hate longs). */ + if ((source_len | *pDest_len) > 0xFFFFFFFFU) + return MZ_PARAM_ERROR; + + stream.next_in = pSource; + stream.avail_in = (mz_uint32)source_len; + stream.next_out = pDest; + stream.avail_out = (mz_uint32)*pDest_len; + + status = mz_inflateInit(&stream); + if (status != MZ_OK) + return status; + + status = mz_inflate(&stream, MZ_FINISH); + if (status != MZ_STREAM_END) + { + mz_inflateEnd(&stream); + return ((status == MZ_BUF_ERROR) && (!stream.avail_in)) ? MZ_DATA_ERROR : status; + } + *pDest_len = stream.total_out; + + return mz_inflateEnd(&stream); +} + +const char *mz_error(int err) +{ + static struct + { + int m_err; + const char *m_pDesc; + } s_error_descs[] = + { + { MZ_OK, "" }, { MZ_STREAM_END, "stream end" }, { MZ_NEED_DICT, "need dictionary" }, { MZ_ERRNO, "file error" }, { MZ_STREAM_ERROR, "stream error" }, { MZ_DATA_ERROR, "data error" }, { MZ_MEM_ERROR, "out of memory" }, { MZ_BUF_ERROR, "buf error" }, { MZ_VERSION_ERROR, "version error" }, { MZ_PARAM_ERROR, "parameter error" } + }; + mz_uint i; + for (i = 0; i < sizeof(s_error_descs) / sizeof(s_error_descs[0]); ++i) + if (s_error_descs[i].m_err == err) + return s_error_descs[i].m_pDesc; + return NULL; +} + +#endif /*MINIZ_NO_ZLIB_APIS */ + +#ifdef __cplusplus +} +#endif + +/* + This is free and unencumbered software released into the public domain. + + Anyone is free to copy, modify, publish, use, compile, sell, or + distribute this software, either in source code form or as a compiled + binary, for any purpose, commercial or non-commercial, and by any + means. + + In jurisdictions that recognize copyright laws, the author or authors + of this software dedicate any and all copyright interest in the + software to the public domain. We make this dedication for the benefit + of the public at large and to the detriment of our heirs and + successors. We intend this dedication to be an overt act of + relinquishment in perpetuity of all present and future rights to this + software under copyright law. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR + OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + OTHER DEALINGS IN THE SOFTWARE. + + For more information, please refer to +*/ +/************************************************************************** + * + * Copyright 2013-2014 RAD Game Tools and Valve Software + * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + **************************************************************************/ + + + + +#ifdef __cplusplus +extern "C" { +#endif + +/* ------------------- Low-level Compression (independent from all decompression API's) */ + +/* Purposely making these tables static for faster init and thread safety. */ +static const mz_uint16 s_tdefl_len_sym[256] = + { + 257, 258, 259, 260, 261, 262, 263, 264, 265, 265, 266, 266, 267, 267, 268, 268, 269, 269, 269, 269, 270, 270, 270, 270, 271, 271, 271, 271, 272, 272, 272, 272, + 273, 273, 273, 273, 273, 273, 273, 273, 274, 274, 274, 274, 274, 274, 274, 274, 275, 275, 275, 275, 275, 275, 275, 275, 276, 276, 276, 276, 276, 276, 276, 276, + 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 277, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, 278, + 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 279, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, 280, + 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, 281, + 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, 282, + 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, + 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 284, 285 + }; + +static const mz_uint8 s_tdefl_len_extra[256] = + { + 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 0 + }; + +static const mz_uint8 s_tdefl_small_dist_sym[512] = + { + 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, + 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, + 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, + 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, + 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, + 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, + 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, + 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, + 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17 + }; + +static const mz_uint8 s_tdefl_small_dist_extra[512] = + { + 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7 + }; + +static const mz_uint8 s_tdefl_large_dist_sym[128] = + { + 0, 0, 18, 19, 20, 20, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, + 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, + 28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29 + }; + +static const mz_uint8 s_tdefl_large_dist_extra[128] = + { + 0, 0, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, + 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, + 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13 + }; + +/* Radix sorts tdefl_sym_freq[] array by 16-bit key m_key. Returns ptr to sorted values. */ +typedef struct +{ + mz_uint16 m_key, m_sym_index; +} tdefl_sym_freq; +static tdefl_sym_freq *tdefl_radix_sort_syms(mz_uint num_syms, tdefl_sym_freq *pSyms0, tdefl_sym_freq *pSyms1) +{ + mz_uint32 total_passes = 2, pass_shift, pass, i, hist[256 * 2]; + tdefl_sym_freq *pCur_syms = pSyms0, *pNew_syms = pSyms1; + MZ_CLEAR_OBJ(hist); + for (i = 0; i < num_syms; i++) + { + mz_uint freq = pSyms0[i].m_key; + hist[freq & 0xFF]++; + hist[256 + ((freq >> 8) & 0xFF)]++; + } + while ((total_passes > 1) && (num_syms == hist[(total_passes - 1) * 256])) + total_passes--; + for (pass_shift = 0, pass = 0; pass < total_passes; pass++, pass_shift += 8) + { + const mz_uint32 *pHist = &hist[pass << 8]; + mz_uint offsets[256], cur_ofs = 0; + for (i = 0; i < 256; i++) + { + offsets[i] = cur_ofs; + cur_ofs += pHist[i]; + } + for (i = 0; i < num_syms; i++) + pNew_syms[offsets[(pCur_syms[i].m_key >> pass_shift) & 0xFF]++] = pCur_syms[i]; + { + tdefl_sym_freq *t = pCur_syms; + pCur_syms = pNew_syms; + pNew_syms = t; + } + } + return pCur_syms; +} + +/* tdefl_calculate_minimum_redundancy() originally written by: Alistair Moffat, alistair@cs.mu.oz.au, Jyrki Katajainen, jyrki@diku.dk, November 1996. */ +static void tdefl_calculate_minimum_redundancy(tdefl_sym_freq *A, int n) +{ + int root, leaf, next, avbl, used, dpth; + if (n == 0) + return; + else if (n == 1) + { + A[0].m_key = 1; + return; + } + A[0].m_key += A[1].m_key; + root = 0; + leaf = 2; + for (next = 1; next < n - 1; next++) + { + if (leaf >= n || A[root].m_key < A[leaf].m_key) + { + A[next].m_key = A[root].m_key; + A[root++].m_key = (mz_uint16)next; + } + else + A[next].m_key = A[leaf++].m_key; + if (leaf >= n || (root < next && A[root].m_key < A[leaf].m_key)) + { + A[next].m_key = (mz_uint16)(A[next].m_key + A[root].m_key); + A[root++].m_key = (mz_uint16)next; + } + else + A[next].m_key = (mz_uint16)(A[next].m_key + A[leaf++].m_key); + } + A[n - 2].m_key = 0; + for (next = n - 3; next >= 0; next--) + A[next].m_key = A[A[next].m_key].m_key + 1; + avbl = 1; + used = dpth = 0; + root = n - 2; + next = n - 1; + while (avbl > 0) + { + while (root >= 0 && (int)A[root].m_key == dpth) + { + used++; + root--; + } + while (avbl > used) + { + A[next--].m_key = (mz_uint16)(dpth); + avbl--; + } + avbl = 2 * used; + dpth++; + used = 0; + } +} + +/* Limits canonical Huffman code table's max code size. */ +enum +{ + TDEFL_MAX_SUPPORTED_HUFF_CODESIZE = 32 +}; +static void tdefl_huffman_enforce_max_code_size(int *pNum_codes, int code_list_len, int max_code_size) +{ + int i; + mz_uint32 total = 0; + if (code_list_len <= 1) + return; + for (i = max_code_size + 1; i <= TDEFL_MAX_SUPPORTED_HUFF_CODESIZE; i++) + pNum_codes[max_code_size] += pNum_codes[i]; + for (i = max_code_size; i > 0; i--) + total += (((mz_uint32)pNum_codes[i]) << (max_code_size - i)); + while (total != (1UL << max_code_size)) + { + pNum_codes[max_code_size]--; + for (i = max_code_size - 1; i > 0; i--) + if (pNum_codes[i]) + { + pNum_codes[i]--; + pNum_codes[i + 1] += 2; + break; + } + total--; + } +} + +static void tdefl_optimize_huffman_table(tdefl_compressor *d, int table_num, int table_len, int code_size_limit, int static_table) +{ + int i, j, l, num_codes[1 + TDEFL_MAX_SUPPORTED_HUFF_CODESIZE]; + mz_uint next_code[TDEFL_MAX_SUPPORTED_HUFF_CODESIZE + 1]; + MZ_CLEAR_OBJ(num_codes); + if (static_table) + { + for (i = 0; i < table_len; i++) + num_codes[d->m_huff_code_sizes[table_num][i]]++; + } + else + { + tdefl_sym_freq syms0[TDEFL_MAX_HUFF_SYMBOLS], syms1[TDEFL_MAX_HUFF_SYMBOLS], *pSyms; + int num_used_syms = 0; + const mz_uint16 *pSym_count = &d->m_huff_count[table_num][0]; + for (i = 0; i < table_len; i++) + if (pSym_count[i]) + { + syms0[num_used_syms].m_key = (mz_uint16)pSym_count[i]; + syms0[num_used_syms++].m_sym_index = (mz_uint16)i; + } + + pSyms = tdefl_radix_sort_syms(num_used_syms, syms0, syms1); + tdefl_calculate_minimum_redundancy(pSyms, num_used_syms); + + for (i = 0; i < num_used_syms; i++) + num_codes[pSyms[i].m_key]++; + + tdefl_huffman_enforce_max_code_size(num_codes, num_used_syms, code_size_limit); + + MZ_CLEAR_OBJ(d->m_huff_code_sizes[table_num]); + MZ_CLEAR_OBJ(d->m_huff_codes[table_num]); + for (i = 1, j = num_used_syms; i <= code_size_limit; i++) + for (l = num_codes[i]; l > 0; l--) + d->m_huff_code_sizes[table_num][pSyms[--j].m_sym_index] = (mz_uint8)(i); + } + + next_code[1] = 0; + for (j = 0, i = 2; i <= code_size_limit; i++) + next_code[i] = j = ((j + num_codes[i - 1]) << 1); + + for (i = 0; i < table_len; i++) + { + mz_uint rev_code = 0, code, code_size; + if ((code_size = d->m_huff_code_sizes[table_num][i]) == 0) + continue; + code = next_code[code_size]++; + for (l = code_size; l > 0; l--, code >>= 1) + rev_code = (rev_code << 1) | (code & 1); + d->m_huff_codes[table_num][i] = (mz_uint16)rev_code; + } +} + +#define TDEFL_PUT_BITS(b, l) \ + do \ + { \ + mz_uint bits = b; \ + mz_uint len = l; \ + MZ_ASSERT(bits <= ((1U << len) - 1U)); \ + d->m_bit_buffer |= (bits << d->m_bits_in); \ + d->m_bits_in += len; \ + while (d->m_bits_in >= 8) \ + { \ + if (d->m_pOutput_buf < d->m_pOutput_buf_end) \ + *d->m_pOutput_buf++ = (mz_uint8)(d->m_bit_buffer); \ + d->m_bit_buffer >>= 8; \ + d->m_bits_in -= 8; \ + } \ + } \ + MZ_MACRO_END + +#define TDEFL_RLE_PREV_CODE_SIZE() \ + { \ + if (rle_repeat_count) \ + { \ + if (rle_repeat_count < 3) \ + { \ + d->m_huff_count[2][prev_code_size] = (mz_uint16)(d->m_huff_count[2][prev_code_size] + rle_repeat_count); \ + while (rle_repeat_count--) \ + packed_code_sizes[num_packed_code_sizes++] = prev_code_size; \ + } \ + else \ + { \ + d->m_huff_count[2][16] = (mz_uint16)(d->m_huff_count[2][16] + 1); \ + packed_code_sizes[num_packed_code_sizes++] = 16; \ + packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_repeat_count - 3); \ + } \ + rle_repeat_count = 0; \ + } \ + } + +#define TDEFL_RLE_ZERO_CODE_SIZE() \ + { \ + if (rle_z_count) \ + { \ + if (rle_z_count < 3) \ + { \ + d->m_huff_count[2][0] = (mz_uint16)(d->m_huff_count[2][0] + rle_z_count); \ + while (rle_z_count--) \ + packed_code_sizes[num_packed_code_sizes++] = 0; \ + } \ + else if (rle_z_count <= 10) \ + { \ + d->m_huff_count[2][17] = (mz_uint16)(d->m_huff_count[2][17] + 1); \ + packed_code_sizes[num_packed_code_sizes++] = 17; \ + packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_z_count - 3); \ + } \ + else \ + { \ + d->m_huff_count[2][18] = (mz_uint16)(d->m_huff_count[2][18] + 1); \ + packed_code_sizes[num_packed_code_sizes++] = 18; \ + packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_z_count - 11); \ + } \ + rle_z_count = 0; \ + } \ + } + +static mz_uint8 s_tdefl_packed_code_size_syms_swizzle[] = { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 }; + +static void tdefl_start_dynamic_block(tdefl_compressor *d) +{ + int num_lit_codes, num_dist_codes, num_bit_lengths; + mz_uint i, total_code_sizes_to_pack, num_packed_code_sizes, rle_z_count, rle_repeat_count, packed_code_sizes_index; + mz_uint8 code_sizes_to_pack[TDEFL_MAX_HUFF_SYMBOLS_0 + TDEFL_MAX_HUFF_SYMBOLS_1], packed_code_sizes[TDEFL_MAX_HUFF_SYMBOLS_0 + TDEFL_MAX_HUFF_SYMBOLS_1], prev_code_size = 0xFF; + + d->m_huff_count[0][256] = 1; + + tdefl_optimize_huffman_table(d, 0, TDEFL_MAX_HUFF_SYMBOLS_0, 15, MZ_FALSE); + tdefl_optimize_huffman_table(d, 1, TDEFL_MAX_HUFF_SYMBOLS_1, 15, MZ_FALSE); + + for (num_lit_codes = 286; num_lit_codes > 257; num_lit_codes--) + if (d->m_huff_code_sizes[0][num_lit_codes - 1]) + break; + for (num_dist_codes = 30; num_dist_codes > 1; num_dist_codes--) + if (d->m_huff_code_sizes[1][num_dist_codes - 1]) + break; + + memcpy(code_sizes_to_pack, &d->m_huff_code_sizes[0][0], num_lit_codes); + memcpy(code_sizes_to_pack + num_lit_codes, &d->m_huff_code_sizes[1][0], num_dist_codes); + total_code_sizes_to_pack = num_lit_codes + num_dist_codes; + num_packed_code_sizes = 0; + rle_z_count = 0; + rle_repeat_count = 0; + + memset(&d->m_huff_count[2][0], 0, sizeof(d->m_huff_count[2][0]) * TDEFL_MAX_HUFF_SYMBOLS_2); + for (i = 0; i < total_code_sizes_to_pack; i++) + { + mz_uint8 code_size = code_sizes_to_pack[i]; + if (!code_size) + { + TDEFL_RLE_PREV_CODE_SIZE(); + if (++rle_z_count == 138) + { + TDEFL_RLE_ZERO_CODE_SIZE(); + } + } + else + { + TDEFL_RLE_ZERO_CODE_SIZE(); + if (code_size != prev_code_size) + { + TDEFL_RLE_PREV_CODE_SIZE(); + d->m_huff_count[2][code_size] = (mz_uint16)(d->m_huff_count[2][code_size] + 1); + packed_code_sizes[num_packed_code_sizes++] = code_size; + } + else if (++rle_repeat_count == 6) + { + TDEFL_RLE_PREV_CODE_SIZE(); + } + } + prev_code_size = code_size; + } + if (rle_repeat_count) + { + TDEFL_RLE_PREV_CODE_SIZE(); + } + else + { + TDEFL_RLE_ZERO_CODE_SIZE(); + } + + tdefl_optimize_huffman_table(d, 2, TDEFL_MAX_HUFF_SYMBOLS_2, 7, MZ_FALSE); + + TDEFL_PUT_BITS(2, 2); + + TDEFL_PUT_BITS(num_lit_codes - 257, 5); + TDEFL_PUT_BITS(num_dist_codes - 1, 5); + + for (num_bit_lengths = 18; num_bit_lengths >= 0; num_bit_lengths--) + if (d->m_huff_code_sizes[2][s_tdefl_packed_code_size_syms_swizzle[num_bit_lengths]]) + break; + num_bit_lengths = MZ_MAX(4, (num_bit_lengths + 1)); + TDEFL_PUT_BITS(num_bit_lengths - 4, 4); + for (i = 0; (int)i < num_bit_lengths; i++) + TDEFL_PUT_BITS(d->m_huff_code_sizes[2][s_tdefl_packed_code_size_syms_swizzle[i]], 3); + + for (packed_code_sizes_index = 0; packed_code_sizes_index < num_packed_code_sizes;) + { + mz_uint code = packed_code_sizes[packed_code_sizes_index++]; + MZ_ASSERT(code < TDEFL_MAX_HUFF_SYMBOLS_2); + TDEFL_PUT_BITS(d->m_huff_codes[2][code], d->m_huff_code_sizes[2][code]); + if (code >= 16) + TDEFL_PUT_BITS(packed_code_sizes[packed_code_sizes_index++], "\02\03\07"[code - 16]); + } +} + +static void tdefl_start_static_block(tdefl_compressor *d) +{ + mz_uint i; + mz_uint8 *p = &d->m_huff_code_sizes[0][0]; + + for (i = 0; i <= 143; ++i) + *p++ = 8; + for (; i <= 255; ++i) + *p++ = 9; + for (; i <= 279; ++i) + *p++ = 7; + for (; i <= 287; ++i) + *p++ = 8; + + memset(d->m_huff_code_sizes[1], 5, 32); + + tdefl_optimize_huffman_table(d, 0, 288, 15, MZ_TRUE); + tdefl_optimize_huffman_table(d, 1, 32, 15, MZ_TRUE); + + TDEFL_PUT_BITS(1, 2); +} + +static const mz_uint mz_bitmasks[17] = { 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF }; + +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN && MINIZ_HAS_64BIT_REGISTERS +static mz_bool tdefl_compress_lz_codes(tdefl_compressor *d) +{ + mz_uint flags; + mz_uint8 *pLZ_codes; + mz_uint8 *pOutput_buf = d->m_pOutput_buf; + mz_uint8 *pLZ_code_buf_end = d->m_pLZ_code_buf; + mz_uint64 bit_buffer = d->m_bit_buffer; + mz_uint bits_in = d->m_bits_in; + +#define TDEFL_PUT_BITS_FAST(b, l) \ + { \ + bit_buffer |= (((mz_uint64)(b)) << bits_in); \ + bits_in += (l); \ + } + + flags = 1; + for (pLZ_codes = d->m_lz_code_buf; pLZ_codes < pLZ_code_buf_end; flags >>= 1) + { + if (flags == 1) + flags = *pLZ_codes++ | 0x100; + + if (flags & 1) + { + mz_uint s0, s1, n0, n1, sym, num_extra_bits; + mz_uint match_len = pLZ_codes[0], match_dist = *(const mz_uint16 *)(pLZ_codes + 1); + pLZ_codes += 3; + + MZ_ASSERT(d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]); + TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][s_tdefl_len_sym[match_len]], d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]); + TDEFL_PUT_BITS_FAST(match_len & mz_bitmasks[s_tdefl_len_extra[match_len]], s_tdefl_len_extra[match_len]); + + /* This sequence coaxes MSVC into using cmov's vs. jmp's. */ + s0 = s_tdefl_small_dist_sym[match_dist & 511]; + n0 = s_tdefl_small_dist_extra[match_dist & 511]; + s1 = s_tdefl_large_dist_sym[match_dist >> 8]; + n1 = s_tdefl_large_dist_extra[match_dist >> 8]; + sym = (match_dist < 512) ? s0 : s1; + num_extra_bits = (match_dist < 512) ? n0 : n1; + + MZ_ASSERT(d->m_huff_code_sizes[1][sym]); + TDEFL_PUT_BITS_FAST(d->m_huff_codes[1][sym], d->m_huff_code_sizes[1][sym]); + TDEFL_PUT_BITS_FAST(match_dist & mz_bitmasks[num_extra_bits], num_extra_bits); + } + else + { + mz_uint lit = *pLZ_codes++; + MZ_ASSERT(d->m_huff_code_sizes[0][lit]); + TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]); + + if (((flags & 2) == 0) && (pLZ_codes < pLZ_code_buf_end)) + { + flags >>= 1; + lit = *pLZ_codes++; + MZ_ASSERT(d->m_huff_code_sizes[0][lit]); + TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]); + + if (((flags & 2) == 0) && (pLZ_codes < pLZ_code_buf_end)) + { + flags >>= 1; + lit = *pLZ_codes++; + MZ_ASSERT(d->m_huff_code_sizes[0][lit]); + TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]); + } + } + } + + if (pOutput_buf >= d->m_pOutput_buf_end) + return MZ_FALSE; + + *(mz_uint64 *)pOutput_buf = bit_buffer; + pOutput_buf += (bits_in >> 3); + bit_buffer >>= (bits_in & ~7); + bits_in &= 7; + } + +#undef TDEFL_PUT_BITS_FAST + + d->m_pOutput_buf = pOutput_buf; + d->m_bits_in = 0; + d->m_bit_buffer = 0; + + while (bits_in) + { + mz_uint32 n = MZ_MIN(bits_in, 16); + TDEFL_PUT_BITS((mz_uint)bit_buffer & mz_bitmasks[n], n); + bit_buffer >>= n; + bits_in -= n; + } + + TDEFL_PUT_BITS(d->m_huff_codes[0][256], d->m_huff_code_sizes[0][256]); + + return (d->m_pOutput_buf < d->m_pOutput_buf_end); +} +#else +static mz_bool tdefl_compress_lz_codes(tdefl_compressor *d) +{ + mz_uint flags; + mz_uint8 *pLZ_codes; + + flags = 1; + for (pLZ_codes = d->m_lz_code_buf; pLZ_codes < d->m_pLZ_code_buf; flags >>= 1) + { + if (flags == 1) + flags = *pLZ_codes++ | 0x100; + if (flags & 1) + { + mz_uint sym, num_extra_bits; + mz_uint match_len = pLZ_codes[0], match_dist = (pLZ_codes[1] | (pLZ_codes[2] << 8)); + pLZ_codes += 3; + + MZ_ASSERT(d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]); + TDEFL_PUT_BITS(d->m_huff_codes[0][s_tdefl_len_sym[match_len]], d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]); + TDEFL_PUT_BITS(match_len & mz_bitmasks[s_tdefl_len_extra[match_len]], s_tdefl_len_extra[match_len]); + + if (match_dist < 512) + { + sym = s_tdefl_small_dist_sym[match_dist]; + num_extra_bits = s_tdefl_small_dist_extra[match_dist]; + } + else + { + sym = s_tdefl_large_dist_sym[match_dist >> 8]; + num_extra_bits = s_tdefl_large_dist_extra[match_dist >> 8]; + } + MZ_ASSERT(d->m_huff_code_sizes[1][sym]); + TDEFL_PUT_BITS(d->m_huff_codes[1][sym], d->m_huff_code_sizes[1][sym]); + TDEFL_PUT_BITS(match_dist & mz_bitmasks[num_extra_bits], num_extra_bits); + } + else + { + mz_uint lit = *pLZ_codes++; + MZ_ASSERT(d->m_huff_code_sizes[0][lit]); + TDEFL_PUT_BITS(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]); + } + } + + TDEFL_PUT_BITS(d->m_huff_codes[0][256], d->m_huff_code_sizes[0][256]); + + return (d->m_pOutput_buf < d->m_pOutput_buf_end); +} +#endif /* MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN && MINIZ_HAS_64BIT_REGISTERS */ + +static mz_bool tdefl_compress_block(tdefl_compressor *d, mz_bool static_block) +{ + if (static_block) + tdefl_start_static_block(d); + else + tdefl_start_dynamic_block(d); + return tdefl_compress_lz_codes(d); +} + +static int tdefl_flush_block(tdefl_compressor *d, int flush) +{ + mz_uint saved_bit_buf, saved_bits_in; + mz_uint8 *pSaved_output_buf; + mz_bool comp_block_succeeded = MZ_FALSE; + int n, use_raw_block = ((d->m_flags & TDEFL_FORCE_ALL_RAW_BLOCKS) != 0) && (d->m_lookahead_pos - d->m_lz_code_buf_dict_pos) <= d->m_dict_size; + mz_uint8 *pOutput_buf_start = ((d->m_pPut_buf_func == NULL) && ((*d->m_pOut_buf_size - d->m_out_buf_ofs) >= TDEFL_OUT_BUF_SIZE)) ? ((mz_uint8 *)d->m_pOut_buf + d->m_out_buf_ofs) : d->m_output_buf; + + d->m_pOutput_buf = pOutput_buf_start; + d->m_pOutput_buf_end = d->m_pOutput_buf + TDEFL_OUT_BUF_SIZE - 16; + + MZ_ASSERT(!d->m_output_flush_remaining); + d->m_output_flush_ofs = 0; + d->m_output_flush_remaining = 0; + + *d->m_pLZ_flags = (mz_uint8)(*d->m_pLZ_flags >> d->m_num_flags_left); + d->m_pLZ_code_buf -= (d->m_num_flags_left == 8); + + if ((d->m_flags & TDEFL_WRITE_ZLIB_HEADER) && (!d->m_block_index)) + { + TDEFL_PUT_BITS(0x78, 8); + TDEFL_PUT_BITS(0x01, 8); + } + + TDEFL_PUT_BITS(flush == TDEFL_FINISH, 1); + + pSaved_output_buf = d->m_pOutput_buf; + saved_bit_buf = d->m_bit_buffer; + saved_bits_in = d->m_bits_in; + + if (!use_raw_block) + comp_block_succeeded = tdefl_compress_block(d, (d->m_flags & TDEFL_FORCE_ALL_STATIC_BLOCKS) || (d->m_total_lz_bytes < 48)); + + /* If the block gets expanded, forget the current contents of the output buffer and send a raw block instead. */ + if (((use_raw_block) || ((d->m_total_lz_bytes) && ((d->m_pOutput_buf - pSaved_output_buf + 1U) >= d->m_total_lz_bytes))) && + ((d->m_lookahead_pos - d->m_lz_code_buf_dict_pos) <= d->m_dict_size)) + { + mz_uint i; + d->m_pOutput_buf = pSaved_output_buf; + d->m_bit_buffer = saved_bit_buf, d->m_bits_in = saved_bits_in; + TDEFL_PUT_BITS(0, 2); + if (d->m_bits_in) + { + TDEFL_PUT_BITS(0, 8 - d->m_bits_in); + } + for (i = 2; i; --i, d->m_total_lz_bytes ^= 0xFFFF) + { + TDEFL_PUT_BITS(d->m_total_lz_bytes & 0xFFFF, 16); + } + for (i = 0; i < d->m_total_lz_bytes; ++i) + { + TDEFL_PUT_BITS(d->m_dict[(d->m_lz_code_buf_dict_pos + i) & TDEFL_LZ_DICT_SIZE_MASK], 8); + } + } + /* Check for the extremely unlikely (if not impossible) case of the compressed block not fitting into the output buffer when using dynamic codes. */ + else if (!comp_block_succeeded) + { + d->m_pOutput_buf = pSaved_output_buf; + d->m_bit_buffer = saved_bit_buf, d->m_bits_in = saved_bits_in; + tdefl_compress_block(d, MZ_TRUE); + } + + if (flush) + { + if (flush == TDEFL_FINISH) + { + if (d->m_bits_in) + { + TDEFL_PUT_BITS(0, 8 - d->m_bits_in); + } + if (d->m_flags & TDEFL_WRITE_ZLIB_HEADER) + { + mz_uint i, a = d->m_adler32; + for (i = 0; i < 4; i++) + { + TDEFL_PUT_BITS((a >> 24) & 0xFF, 8); + a <<= 8; + } + } + } + else + { + mz_uint i, z = 0; + TDEFL_PUT_BITS(0, 3); + if (d->m_bits_in) + { + TDEFL_PUT_BITS(0, 8 - d->m_bits_in); + } + for (i = 2; i; --i, z ^= 0xFFFF) + { + TDEFL_PUT_BITS(z & 0xFFFF, 16); + } + } + } + + MZ_ASSERT(d->m_pOutput_buf < d->m_pOutput_buf_end); + + memset(&d->m_huff_count[0][0], 0, sizeof(d->m_huff_count[0][0]) * TDEFL_MAX_HUFF_SYMBOLS_0); + memset(&d->m_huff_count[1][0], 0, sizeof(d->m_huff_count[1][0]) * TDEFL_MAX_HUFF_SYMBOLS_1); + + d->m_pLZ_code_buf = d->m_lz_code_buf + 1; + d->m_pLZ_flags = d->m_lz_code_buf; + d->m_num_flags_left = 8; + d->m_lz_code_buf_dict_pos += d->m_total_lz_bytes; + d->m_total_lz_bytes = 0; + d->m_block_index++; + + if ((n = (int)(d->m_pOutput_buf - pOutput_buf_start)) != 0) + { + if (d->m_pPut_buf_func) + { + *d->m_pIn_buf_size = d->m_pSrc - (const mz_uint8 *)d->m_pIn_buf; + if (!(*d->m_pPut_buf_func)(d->m_output_buf, n, d->m_pPut_buf_user)) + return (d->m_prev_return_status = TDEFL_STATUS_PUT_BUF_FAILED); + } + else if (pOutput_buf_start == d->m_output_buf) + { + int bytes_to_copy = (int)MZ_MIN((size_t)n, (size_t)(*d->m_pOut_buf_size - d->m_out_buf_ofs)); + memcpy((mz_uint8 *)d->m_pOut_buf + d->m_out_buf_ofs, d->m_output_buf, bytes_to_copy); + d->m_out_buf_ofs += bytes_to_copy; + if ((n -= bytes_to_copy) != 0) + { + d->m_output_flush_ofs = bytes_to_copy; + d->m_output_flush_remaining = n; + } + } + else + { + d->m_out_buf_ofs += n; + } + } + + return d->m_output_flush_remaining; +} + +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES +#ifdef MINIZ_UNALIGNED_USE_MEMCPY +static mz_uint16 TDEFL_READ_UNALIGNED_WORD(const mz_uint8* p) +{ + mz_uint16 ret; + memcpy(&ret, p, sizeof(mz_uint16)); + return ret; +} +static mz_uint16 TDEFL_READ_UNALIGNED_WORD2(const mz_uint16* p) +{ + mz_uint16 ret; + memcpy(&ret, p, sizeof(mz_uint16)); + return ret; +} +#else +#define TDEFL_READ_UNALIGNED_WORD(p) *(const mz_uint16 *)(p) +#define TDEFL_READ_UNALIGNED_WORD2(p) *(const mz_uint16 *)(p) +#endif +static MZ_FORCEINLINE void tdefl_find_match(tdefl_compressor *d, mz_uint lookahead_pos, mz_uint max_dist, mz_uint max_match_len, mz_uint *pMatch_dist, mz_uint *pMatch_len) +{ + mz_uint dist, pos = lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK, match_len = *pMatch_len, probe_pos = pos, next_probe_pos, probe_len; + mz_uint num_probes_left = d->m_max_probes[match_len >= 32]; + const mz_uint16 *s = (const mz_uint16 *)(d->m_dict + pos), *p, *q; + mz_uint16 c01 = TDEFL_READ_UNALIGNED_WORD(&d->m_dict[pos + match_len - 1]), s01 = TDEFL_READ_UNALIGNED_WORD2(s); + MZ_ASSERT(max_match_len <= TDEFL_MAX_MATCH_LEN); + if (max_match_len <= match_len) + return; + for (;;) + { + for (;;) + { + if (--num_probes_left == 0) + return; +#define TDEFL_PROBE \ + next_probe_pos = d->m_next[probe_pos]; \ + if ((!next_probe_pos) || ((dist = (mz_uint16)(lookahead_pos - next_probe_pos)) > max_dist)) \ + return; \ + probe_pos = next_probe_pos & TDEFL_LZ_DICT_SIZE_MASK; \ + if (TDEFL_READ_UNALIGNED_WORD(&d->m_dict[probe_pos + match_len - 1]) == c01) \ + break; + TDEFL_PROBE; + TDEFL_PROBE; + TDEFL_PROBE; + } + if (!dist) + break; + q = (const mz_uint16 *)(d->m_dict + probe_pos); + if (TDEFL_READ_UNALIGNED_WORD2(q) != s01) + continue; + p = s; + probe_len = 32; + do + { + } while ((TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && + (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (--probe_len > 0)); + if (!probe_len) + { + *pMatch_dist = dist; + *pMatch_len = MZ_MIN(max_match_len, (mz_uint)TDEFL_MAX_MATCH_LEN); + break; + } + else if ((probe_len = ((mz_uint)(p - s) * 2) + (mz_uint)(*(const mz_uint8 *)p == *(const mz_uint8 *)q)) > match_len) + { + *pMatch_dist = dist; + if ((*pMatch_len = match_len = MZ_MIN(max_match_len, probe_len)) == max_match_len) + break; + c01 = TDEFL_READ_UNALIGNED_WORD(&d->m_dict[pos + match_len - 1]); + } + } +} +#else +static MZ_FORCEINLINE void tdefl_find_match(tdefl_compressor *d, mz_uint lookahead_pos, mz_uint max_dist, mz_uint max_match_len, mz_uint *pMatch_dist, mz_uint *pMatch_len) +{ + mz_uint dist, pos = lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK, match_len = *pMatch_len, probe_pos = pos, next_probe_pos, probe_len; + mz_uint num_probes_left = d->m_max_probes[match_len >= 32]; + const mz_uint8 *s = d->m_dict + pos, *p, *q; + mz_uint8 c0 = d->m_dict[pos + match_len], c1 = d->m_dict[pos + match_len - 1]; + MZ_ASSERT(max_match_len <= TDEFL_MAX_MATCH_LEN); + if (max_match_len <= match_len) + return; + for (;;) + { + for (;;) + { + if (--num_probes_left == 0) + return; +#define TDEFL_PROBE \ + next_probe_pos = d->m_next[probe_pos]; \ + if ((!next_probe_pos) || ((dist = (mz_uint16)(lookahead_pos - next_probe_pos)) > max_dist)) \ + return; \ + probe_pos = next_probe_pos & TDEFL_LZ_DICT_SIZE_MASK; \ + if ((d->m_dict[probe_pos + match_len] == c0) && (d->m_dict[probe_pos + match_len - 1] == c1)) \ + break; + TDEFL_PROBE; + TDEFL_PROBE; + TDEFL_PROBE; + } + if (!dist) + break; + p = s; + q = d->m_dict + probe_pos; + for (probe_len = 0; probe_len < max_match_len; probe_len++) + if (*p++ != *q++) + break; + if (probe_len > match_len) + { + *pMatch_dist = dist; + if ((*pMatch_len = match_len = probe_len) == max_match_len) + return; + c0 = d->m_dict[pos + match_len]; + c1 = d->m_dict[pos + match_len - 1]; + } + } +} +#endif /* #if MINIZ_USE_UNALIGNED_LOADS_AND_STORES */ + +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN +#ifdef MINIZ_UNALIGNED_USE_MEMCPY +static mz_uint32 TDEFL_READ_UNALIGNED_WORD32(const mz_uint8* p) +{ + mz_uint32 ret; + memcpy(&ret, p, sizeof(mz_uint32)); + return ret; +} +#else +#define TDEFL_READ_UNALIGNED_WORD32(p) *(const mz_uint32 *)(p) +#endif +static mz_bool tdefl_compress_fast(tdefl_compressor *d) +{ + /* Faster, minimally featured LZRW1-style match+parse loop with better register utilization. Intended for applications where raw throughput is valued more highly than ratio. */ + mz_uint lookahead_pos = d->m_lookahead_pos, lookahead_size = d->m_lookahead_size, dict_size = d->m_dict_size, total_lz_bytes = d->m_total_lz_bytes, num_flags_left = d->m_num_flags_left; + mz_uint8 *pLZ_code_buf = d->m_pLZ_code_buf, *pLZ_flags = d->m_pLZ_flags; + mz_uint cur_pos = lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK; + + while ((d->m_src_buf_left) || ((d->m_flush) && (lookahead_size))) + { + const mz_uint TDEFL_COMP_FAST_LOOKAHEAD_SIZE = 4096; + mz_uint dst_pos = (lookahead_pos + lookahead_size) & TDEFL_LZ_DICT_SIZE_MASK; + mz_uint num_bytes_to_process = (mz_uint)MZ_MIN(d->m_src_buf_left, TDEFL_COMP_FAST_LOOKAHEAD_SIZE - lookahead_size); + d->m_src_buf_left -= num_bytes_to_process; + lookahead_size += num_bytes_to_process; + + while (num_bytes_to_process) + { + mz_uint32 n = MZ_MIN(TDEFL_LZ_DICT_SIZE - dst_pos, num_bytes_to_process); + memcpy(d->m_dict + dst_pos, d->m_pSrc, n); + if (dst_pos < (TDEFL_MAX_MATCH_LEN - 1)) + memcpy(d->m_dict + TDEFL_LZ_DICT_SIZE + dst_pos, d->m_pSrc, MZ_MIN(n, (TDEFL_MAX_MATCH_LEN - 1) - dst_pos)); + d->m_pSrc += n; + dst_pos = (dst_pos + n) & TDEFL_LZ_DICT_SIZE_MASK; + num_bytes_to_process -= n; + } + + dict_size = MZ_MIN(TDEFL_LZ_DICT_SIZE - lookahead_size, dict_size); + if ((!d->m_flush) && (lookahead_size < TDEFL_COMP_FAST_LOOKAHEAD_SIZE)) + break; + + while (lookahead_size >= 4) + { + mz_uint cur_match_dist, cur_match_len = 1; + mz_uint8 *pCur_dict = d->m_dict + cur_pos; + mz_uint first_trigram = TDEFL_READ_UNALIGNED_WORD32(pCur_dict) & 0xFFFFFF; + mz_uint hash = (first_trigram ^ (first_trigram >> (24 - (TDEFL_LZ_HASH_BITS - 8)))) & TDEFL_LEVEL1_HASH_SIZE_MASK; + mz_uint probe_pos = d->m_hash[hash]; + d->m_hash[hash] = (mz_uint16)lookahead_pos; + + if (((cur_match_dist = (mz_uint16)(lookahead_pos - probe_pos)) <= dict_size) && ((TDEFL_READ_UNALIGNED_WORD32(d->m_dict + (probe_pos &= TDEFL_LZ_DICT_SIZE_MASK)) & 0xFFFFFF) == first_trigram)) + { + const mz_uint16 *p = (const mz_uint16 *)pCur_dict; + const mz_uint16 *q = (const mz_uint16 *)(d->m_dict + probe_pos); + mz_uint32 probe_len = 32; + do + { + } while ((TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && + (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (TDEFL_READ_UNALIGNED_WORD2(++p) == TDEFL_READ_UNALIGNED_WORD2(++q)) && (--probe_len > 0)); + cur_match_len = ((mz_uint)(p - (const mz_uint16 *)pCur_dict) * 2) + (mz_uint)(*(const mz_uint8 *)p == *(const mz_uint8 *)q); + if (!probe_len) + cur_match_len = cur_match_dist ? TDEFL_MAX_MATCH_LEN : 0; + + if ((cur_match_len < TDEFL_MIN_MATCH_LEN) || ((cur_match_len == TDEFL_MIN_MATCH_LEN) && (cur_match_dist >= 8U * 1024U))) + { + cur_match_len = 1; + *pLZ_code_buf++ = (mz_uint8)first_trigram; + *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1); + d->m_huff_count[0][(mz_uint8)first_trigram]++; + } + else + { + mz_uint32 s0, s1; + cur_match_len = MZ_MIN(cur_match_len, lookahead_size); + + MZ_ASSERT((cur_match_len >= TDEFL_MIN_MATCH_LEN) && (cur_match_dist >= 1) && (cur_match_dist <= TDEFL_LZ_DICT_SIZE)); + + cur_match_dist--; + + pLZ_code_buf[0] = (mz_uint8)(cur_match_len - TDEFL_MIN_MATCH_LEN); +#ifdef MINIZ_UNALIGNED_USE_MEMCPY + memcpy(&pLZ_code_buf[1], &cur_match_dist, sizeof(cur_match_dist)); +#else + *(mz_uint16 *)(&pLZ_code_buf[1]) = (mz_uint16)cur_match_dist; +#endif + pLZ_code_buf += 3; + *pLZ_flags = (mz_uint8)((*pLZ_flags >> 1) | 0x80); + + s0 = s_tdefl_small_dist_sym[cur_match_dist & 511]; + s1 = s_tdefl_large_dist_sym[cur_match_dist >> 8]; + d->m_huff_count[1][(cur_match_dist < 512) ? s0 : s1]++; + + d->m_huff_count[0][s_tdefl_len_sym[cur_match_len - TDEFL_MIN_MATCH_LEN]]++; + } + } + else + { + *pLZ_code_buf++ = (mz_uint8)first_trigram; + *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1); + d->m_huff_count[0][(mz_uint8)first_trigram]++; + } + + if (--num_flags_left == 0) + { + num_flags_left = 8; + pLZ_flags = pLZ_code_buf++; + } + + total_lz_bytes += cur_match_len; + lookahead_pos += cur_match_len; + dict_size = MZ_MIN(dict_size + cur_match_len, (mz_uint)TDEFL_LZ_DICT_SIZE); + cur_pos = (cur_pos + cur_match_len) & TDEFL_LZ_DICT_SIZE_MASK; + MZ_ASSERT(lookahead_size >= cur_match_len); + lookahead_size -= cur_match_len; + + if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) + { + int n; + d->m_lookahead_pos = lookahead_pos; + d->m_lookahead_size = lookahead_size; + d->m_dict_size = dict_size; + d->m_total_lz_bytes = total_lz_bytes; + d->m_pLZ_code_buf = pLZ_code_buf; + d->m_pLZ_flags = pLZ_flags; + d->m_num_flags_left = num_flags_left; + if ((n = tdefl_flush_block(d, 0)) != 0) + return (n < 0) ? MZ_FALSE : MZ_TRUE; + total_lz_bytes = d->m_total_lz_bytes; + pLZ_code_buf = d->m_pLZ_code_buf; + pLZ_flags = d->m_pLZ_flags; + num_flags_left = d->m_num_flags_left; + } + } + + while (lookahead_size) + { + mz_uint8 lit = d->m_dict[cur_pos]; + + total_lz_bytes++; + *pLZ_code_buf++ = lit; + *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1); + if (--num_flags_left == 0) + { + num_flags_left = 8; + pLZ_flags = pLZ_code_buf++; + } + + d->m_huff_count[0][lit]++; + + lookahead_pos++; + dict_size = MZ_MIN(dict_size + 1, (mz_uint)TDEFL_LZ_DICT_SIZE); + cur_pos = (cur_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK; + lookahead_size--; + + if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) + { + int n; + d->m_lookahead_pos = lookahead_pos; + d->m_lookahead_size = lookahead_size; + d->m_dict_size = dict_size; + d->m_total_lz_bytes = total_lz_bytes; + d->m_pLZ_code_buf = pLZ_code_buf; + d->m_pLZ_flags = pLZ_flags; + d->m_num_flags_left = num_flags_left; + if ((n = tdefl_flush_block(d, 0)) != 0) + return (n < 0) ? MZ_FALSE : MZ_TRUE; + total_lz_bytes = d->m_total_lz_bytes; + pLZ_code_buf = d->m_pLZ_code_buf; + pLZ_flags = d->m_pLZ_flags; + num_flags_left = d->m_num_flags_left; + } + } + } + + d->m_lookahead_pos = lookahead_pos; + d->m_lookahead_size = lookahead_size; + d->m_dict_size = dict_size; + d->m_total_lz_bytes = total_lz_bytes; + d->m_pLZ_code_buf = pLZ_code_buf; + d->m_pLZ_flags = pLZ_flags; + d->m_num_flags_left = num_flags_left; + return MZ_TRUE; +} +#endif /* MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN */ + +static MZ_FORCEINLINE void tdefl_record_literal(tdefl_compressor *d, mz_uint8 lit) +{ + d->m_total_lz_bytes++; + *d->m_pLZ_code_buf++ = lit; + *d->m_pLZ_flags = (mz_uint8)(*d->m_pLZ_flags >> 1); + if (--d->m_num_flags_left == 0) + { + d->m_num_flags_left = 8; + d->m_pLZ_flags = d->m_pLZ_code_buf++; + } + d->m_huff_count[0][lit]++; +} + +static MZ_FORCEINLINE void tdefl_record_match(tdefl_compressor *d, mz_uint match_len, mz_uint match_dist) +{ + mz_uint32 s0, s1; + + MZ_ASSERT((match_len >= TDEFL_MIN_MATCH_LEN) && (match_dist >= 1) && (match_dist <= TDEFL_LZ_DICT_SIZE)); + + d->m_total_lz_bytes += match_len; + + d->m_pLZ_code_buf[0] = (mz_uint8)(match_len - TDEFL_MIN_MATCH_LEN); + + match_dist -= 1; + d->m_pLZ_code_buf[1] = (mz_uint8)(match_dist & 0xFF); + d->m_pLZ_code_buf[2] = (mz_uint8)(match_dist >> 8); + d->m_pLZ_code_buf += 3; + + *d->m_pLZ_flags = (mz_uint8)((*d->m_pLZ_flags >> 1) | 0x80); + if (--d->m_num_flags_left == 0) + { + d->m_num_flags_left = 8; + d->m_pLZ_flags = d->m_pLZ_code_buf++; + } + + s0 = s_tdefl_small_dist_sym[match_dist & 511]; + s1 = s_tdefl_large_dist_sym[(match_dist >> 8) & 127]; + d->m_huff_count[1][(match_dist < 512) ? s0 : s1]++; + + if (match_len >= TDEFL_MIN_MATCH_LEN) + d->m_huff_count[0][s_tdefl_len_sym[match_len - TDEFL_MIN_MATCH_LEN]]++; +} + +static mz_bool tdefl_compress_normal(tdefl_compressor *d) +{ + const mz_uint8 *pSrc = d->m_pSrc; + size_t src_buf_left = d->m_src_buf_left; + tdefl_flush flush = d->m_flush; + + while ((src_buf_left) || ((flush) && (d->m_lookahead_size))) + { + mz_uint len_to_move, cur_match_dist, cur_match_len, cur_pos; + /* Update dictionary and hash chains. Keeps the lookahead size equal to TDEFL_MAX_MATCH_LEN. */ + if ((d->m_lookahead_size + d->m_dict_size) >= (TDEFL_MIN_MATCH_LEN - 1)) + { + mz_uint dst_pos = (d->m_lookahead_pos + d->m_lookahead_size) & TDEFL_LZ_DICT_SIZE_MASK, ins_pos = d->m_lookahead_pos + d->m_lookahead_size - 2; + mz_uint hash = (d->m_dict[ins_pos & TDEFL_LZ_DICT_SIZE_MASK] << TDEFL_LZ_HASH_SHIFT) ^ d->m_dict[(ins_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK]; + mz_uint num_bytes_to_process = (mz_uint)MZ_MIN(src_buf_left, TDEFL_MAX_MATCH_LEN - d->m_lookahead_size); + const mz_uint8 *pSrc_end = pSrc + num_bytes_to_process; + src_buf_left -= num_bytes_to_process; + d->m_lookahead_size += num_bytes_to_process; + while (pSrc != pSrc_end) + { + mz_uint8 c = *pSrc++; + d->m_dict[dst_pos] = c; + if (dst_pos < (TDEFL_MAX_MATCH_LEN - 1)) + d->m_dict[TDEFL_LZ_DICT_SIZE + dst_pos] = c; + hash = ((hash << TDEFL_LZ_HASH_SHIFT) ^ c) & (TDEFL_LZ_HASH_SIZE - 1); + d->m_next[ins_pos & TDEFL_LZ_DICT_SIZE_MASK] = d->m_hash[hash]; + d->m_hash[hash] = (mz_uint16)(ins_pos); + dst_pos = (dst_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK; + ins_pos++; + } + } + else + { + while ((src_buf_left) && (d->m_lookahead_size < TDEFL_MAX_MATCH_LEN)) + { + mz_uint8 c = *pSrc++; + mz_uint dst_pos = (d->m_lookahead_pos + d->m_lookahead_size) & TDEFL_LZ_DICT_SIZE_MASK; + src_buf_left--; + d->m_dict[dst_pos] = c; + if (dst_pos < (TDEFL_MAX_MATCH_LEN - 1)) + d->m_dict[TDEFL_LZ_DICT_SIZE + dst_pos] = c; + if ((++d->m_lookahead_size + d->m_dict_size) >= TDEFL_MIN_MATCH_LEN) + { + mz_uint ins_pos = d->m_lookahead_pos + (d->m_lookahead_size - 1) - 2; + mz_uint hash = ((d->m_dict[ins_pos & TDEFL_LZ_DICT_SIZE_MASK] << (TDEFL_LZ_HASH_SHIFT * 2)) ^ (d->m_dict[(ins_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK] << TDEFL_LZ_HASH_SHIFT) ^ c) & (TDEFL_LZ_HASH_SIZE - 1); + d->m_next[ins_pos & TDEFL_LZ_DICT_SIZE_MASK] = d->m_hash[hash]; + d->m_hash[hash] = (mz_uint16)(ins_pos); + } + } + } + d->m_dict_size = MZ_MIN(TDEFL_LZ_DICT_SIZE - d->m_lookahead_size, d->m_dict_size); + if ((!flush) && (d->m_lookahead_size < TDEFL_MAX_MATCH_LEN)) + break; + + /* Simple lazy/greedy parsing state machine. */ + len_to_move = 1; + cur_match_dist = 0; + cur_match_len = d->m_saved_match_len ? d->m_saved_match_len : (TDEFL_MIN_MATCH_LEN - 1); + cur_pos = d->m_lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK; + if (d->m_flags & (TDEFL_RLE_MATCHES | TDEFL_FORCE_ALL_RAW_BLOCKS)) + { + if ((d->m_dict_size) && (!(d->m_flags & TDEFL_FORCE_ALL_RAW_BLOCKS))) + { + mz_uint8 c = d->m_dict[(cur_pos - 1) & TDEFL_LZ_DICT_SIZE_MASK]; + cur_match_len = 0; + while (cur_match_len < d->m_lookahead_size) + { + if (d->m_dict[cur_pos + cur_match_len] != c) + break; + cur_match_len++; + } + if (cur_match_len < TDEFL_MIN_MATCH_LEN) + cur_match_len = 0; + else + cur_match_dist = 1; + } + } + else + { + tdefl_find_match(d, d->m_lookahead_pos, d->m_dict_size, d->m_lookahead_size, &cur_match_dist, &cur_match_len); + } + if (((cur_match_len == TDEFL_MIN_MATCH_LEN) && (cur_match_dist >= 8U * 1024U)) || (cur_pos == cur_match_dist) || ((d->m_flags & TDEFL_FILTER_MATCHES) && (cur_match_len <= 5))) + { + cur_match_dist = cur_match_len = 0; + } + if (d->m_saved_match_len) + { + if (cur_match_len > d->m_saved_match_len) + { + tdefl_record_literal(d, (mz_uint8)d->m_saved_lit); + if (cur_match_len >= 128) + { + tdefl_record_match(d, cur_match_len, cur_match_dist); + d->m_saved_match_len = 0; + len_to_move = cur_match_len; + } + else + { + d->m_saved_lit = d->m_dict[cur_pos]; + d->m_saved_match_dist = cur_match_dist; + d->m_saved_match_len = cur_match_len; + } + } + else + { + tdefl_record_match(d, d->m_saved_match_len, d->m_saved_match_dist); + len_to_move = d->m_saved_match_len - 1; + d->m_saved_match_len = 0; + } + } + else if (!cur_match_dist) + tdefl_record_literal(d, d->m_dict[MZ_MIN(cur_pos, sizeof(d->m_dict) - 1)]); + else if ((d->m_greedy_parsing) || (d->m_flags & TDEFL_RLE_MATCHES) || (cur_match_len >= 128)) + { + tdefl_record_match(d, cur_match_len, cur_match_dist); + len_to_move = cur_match_len; + } + else + { + d->m_saved_lit = d->m_dict[MZ_MIN(cur_pos, sizeof(d->m_dict) - 1)]; + d->m_saved_match_dist = cur_match_dist; + d->m_saved_match_len = cur_match_len; + } + /* Move the lookahead forward by len_to_move bytes. */ + d->m_lookahead_pos += len_to_move; + MZ_ASSERT(d->m_lookahead_size >= len_to_move); + d->m_lookahead_size -= len_to_move; + d->m_dict_size = MZ_MIN(d->m_dict_size + len_to_move, (mz_uint)TDEFL_LZ_DICT_SIZE); + /* Check if it's time to flush the current LZ codes to the internal output buffer. */ + if ((d->m_pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) || + ((d->m_total_lz_bytes > 31 * 1024) && (((((mz_uint)(d->m_pLZ_code_buf - d->m_lz_code_buf) * 115) >> 7) >= d->m_total_lz_bytes) || (d->m_flags & TDEFL_FORCE_ALL_RAW_BLOCKS)))) + { + int n; + d->m_pSrc = pSrc; + d->m_src_buf_left = src_buf_left; + if ((n = tdefl_flush_block(d, 0)) != 0) + return (n < 0) ? MZ_FALSE : MZ_TRUE; + } + } + + d->m_pSrc = pSrc; + d->m_src_buf_left = src_buf_left; + return MZ_TRUE; +} + +static tdefl_status tdefl_flush_output_buffer(tdefl_compressor *d) +{ + if (d->m_pIn_buf_size) + { + *d->m_pIn_buf_size = d->m_pSrc - (const mz_uint8 *)d->m_pIn_buf; + } + + if (d->m_pOut_buf_size) + { + size_t n = MZ_MIN(*d->m_pOut_buf_size - d->m_out_buf_ofs, d->m_output_flush_remaining); + memcpy((mz_uint8 *)d->m_pOut_buf + d->m_out_buf_ofs, d->m_output_buf + d->m_output_flush_ofs, n); + d->m_output_flush_ofs += (mz_uint)n; + d->m_output_flush_remaining -= (mz_uint)n; + d->m_out_buf_ofs += n; + + *d->m_pOut_buf_size = d->m_out_buf_ofs; + } + + return (d->m_finished && !d->m_output_flush_remaining) ? TDEFL_STATUS_DONE : TDEFL_STATUS_OKAY; +} + +tdefl_status tdefl_compress(tdefl_compressor *d, const void *pIn_buf, size_t *pIn_buf_size, void *pOut_buf, size_t *pOut_buf_size, tdefl_flush flush) +{ + if (!d) + { + if (pIn_buf_size) + *pIn_buf_size = 0; + if (pOut_buf_size) + *pOut_buf_size = 0; + return TDEFL_STATUS_BAD_PARAM; + } + + d->m_pIn_buf = pIn_buf; + d->m_pIn_buf_size = pIn_buf_size; + d->m_pOut_buf = pOut_buf; + d->m_pOut_buf_size = pOut_buf_size; + d->m_pSrc = (const mz_uint8 *)(pIn_buf); + d->m_src_buf_left = pIn_buf_size ? *pIn_buf_size : 0; + d->m_out_buf_ofs = 0; + d->m_flush = flush; + + if (((d->m_pPut_buf_func != NULL) == ((pOut_buf != NULL) || (pOut_buf_size != NULL))) || (d->m_prev_return_status != TDEFL_STATUS_OKAY) || + (d->m_wants_to_finish && (flush != TDEFL_FINISH)) || (pIn_buf_size && *pIn_buf_size && !pIn_buf) || (pOut_buf_size && *pOut_buf_size && !pOut_buf)) + { + if (pIn_buf_size) + *pIn_buf_size = 0; + if (pOut_buf_size) + *pOut_buf_size = 0; + return (d->m_prev_return_status = TDEFL_STATUS_BAD_PARAM); + } + d->m_wants_to_finish |= (flush == TDEFL_FINISH); + + if ((d->m_output_flush_remaining) || (d->m_finished)) + return (d->m_prev_return_status = tdefl_flush_output_buffer(d)); + +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN + if (((d->m_flags & TDEFL_MAX_PROBES_MASK) == 1) && + ((d->m_flags & TDEFL_GREEDY_PARSING_FLAG) != 0) && + ((d->m_flags & (TDEFL_FILTER_MATCHES | TDEFL_FORCE_ALL_RAW_BLOCKS | TDEFL_RLE_MATCHES)) == 0)) + { + if (!tdefl_compress_fast(d)) + return d->m_prev_return_status; + } + else +#endif /* #if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN */ + { + if (!tdefl_compress_normal(d)) + return d->m_prev_return_status; + } + + if ((d->m_flags & (TDEFL_WRITE_ZLIB_HEADER | TDEFL_COMPUTE_ADLER32)) && (pIn_buf)) + d->m_adler32 = (mz_uint32)mz_adler32(d->m_adler32, (const mz_uint8 *)pIn_buf, d->m_pSrc - (const mz_uint8 *)pIn_buf); + + if ((flush) && (!d->m_lookahead_size) && (!d->m_src_buf_left) && (!d->m_output_flush_remaining)) + { + if (tdefl_flush_block(d, flush) < 0) + return d->m_prev_return_status; + d->m_finished = (flush == TDEFL_FINISH); + if (flush == TDEFL_FULL_FLUSH) + { + MZ_CLEAR_OBJ(d->m_hash); + MZ_CLEAR_OBJ(d->m_next); + d->m_dict_size = 0; + } + } + + return (d->m_prev_return_status = tdefl_flush_output_buffer(d)); +} + +tdefl_status tdefl_compress_buffer(tdefl_compressor *d, const void *pIn_buf, size_t in_buf_size, tdefl_flush flush) +{ + MZ_ASSERT(d->m_pPut_buf_func); + return tdefl_compress(d, pIn_buf, &in_buf_size, NULL, NULL, flush); +} + +tdefl_status tdefl_init(tdefl_compressor *d, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags) +{ + d->m_pPut_buf_func = pPut_buf_func; + d->m_pPut_buf_user = pPut_buf_user; + d->m_flags = (mz_uint)(flags); + d->m_max_probes[0] = 1 + ((flags & 0xFFF) + 2) / 3; + d->m_greedy_parsing = (flags & TDEFL_GREEDY_PARSING_FLAG) != 0; + d->m_max_probes[1] = 1 + (((flags & 0xFFF) >> 2) + 2) / 3; + if (!(flags & TDEFL_NONDETERMINISTIC_PARSING_FLAG)) + MZ_CLEAR_OBJ(d->m_hash); + d->m_lookahead_pos = d->m_lookahead_size = d->m_dict_size = d->m_total_lz_bytes = d->m_lz_code_buf_dict_pos = d->m_bits_in = 0; + d->m_output_flush_ofs = d->m_output_flush_remaining = d->m_finished = d->m_block_index = d->m_bit_buffer = d->m_wants_to_finish = 0; + d->m_pLZ_code_buf = d->m_lz_code_buf + 1; + d->m_pLZ_flags = d->m_lz_code_buf; + d->m_num_flags_left = 8; + d->m_pOutput_buf = d->m_output_buf; + d->m_pOutput_buf_end = d->m_output_buf; + d->m_prev_return_status = TDEFL_STATUS_OKAY; + d->m_saved_match_dist = d->m_saved_match_len = d->m_saved_lit = 0; + d->m_adler32 = 1; + d->m_pIn_buf = NULL; + d->m_pOut_buf = NULL; + d->m_pIn_buf_size = NULL; + d->m_pOut_buf_size = NULL; + d->m_flush = TDEFL_NO_FLUSH; + d->m_pSrc = NULL; + d->m_src_buf_left = 0; + d->m_out_buf_ofs = 0; + if (!(flags & TDEFL_NONDETERMINISTIC_PARSING_FLAG)) + MZ_CLEAR_OBJ(d->m_dict); + memset(&d->m_huff_count[0][0], 0, sizeof(d->m_huff_count[0][0]) * TDEFL_MAX_HUFF_SYMBOLS_0); + memset(&d->m_huff_count[1][0], 0, sizeof(d->m_huff_count[1][0]) * TDEFL_MAX_HUFF_SYMBOLS_1); + return TDEFL_STATUS_OKAY; +} + +tdefl_status tdefl_get_prev_return_status(tdefl_compressor *d) +{ + return d->m_prev_return_status; +} + +mz_uint32 tdefl_get_adler32(tdefl_compressor *d) +{ + return d->m_adler32; +} + +mz_bool tdefl_compress_mem_to_output(const void *pBuf, size_t buf_len, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags) +{ + tdefl_compressor *pComp; + mz_bool succeeded; + if (((buf_len) && (!pBuf)) || (!pPut_buf_func)) + return MZ_FALSE; + pComp = (tdefl_compressor *)MZ_MALLOC(sizeof(tdefl_compressor)); + if (!pComp) + return MZ_FALSE; + succeeded = (tdefl_init(pComp, pPut_buf_func, pPut_buf_user, flags) == TDEFL_STATUS_OKAY); + succeeded = succeeded && (tdefl_compress_buffer(pComp, pBuf, buf_len, TDEFL_FINISH) == TDEFL_STATUS_DONE); + MZ_FREE(pComp); + return succeeded; +} + +typedef struct +{ + size_t m_size, m_capacity; + mz_uint8 *m_pBuf; + mz_bool m_expandable; +} tdefl_output_buffer; + +static mz_bool tdefl_output_buffer_putter(const void *pBuf, int len, void *pUser) +{ + tdefl_output_buffer *p = (tdefl_output_buffer *)pUser; + size_t new_size = p->m_size + len; + if (new_size > p->m_capacity) + { + size_t new_capacity = p->m_capacity; + mz_uint8 *pNew_buf; + if (!p->m_expandable) + return MZ_FALSE; + do + { + new_capacity = MZ_MAX(128U, new_capacity << 1U); + } while (new_size > new_capacity); + pNew_buf = (mz_uint8 *)MZ_REALLOC(p->m_pBuf, new_capacity); + if (!pNew_buf) + return MZ_FALSE; + p->m_pBuf = pNew_buf; + p->m_capacity = new_capacity; + } + memcpy((mz_uint8 *)p->m_pBuf + p->m_size, pBuf, len); + p->m_size = new_size; + return MZ_TRUE; +} + +void *tdefl_compress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags) +{ + tdefl_output_buffer out_buf; + MZ_CLEAR_OBJ(out_buf); + if (!pOut_len) + return MZ_FALSE; + else + *pOut_len = 0; + out_buf.m_expandable = MZ_TRUE; + if (!tdefl_compress_mem_to_output(pSrc_buf, src_buf_len, tdefl_output_buffer_putter, &out_buf, flags)) + return NULL; + *pOut_len = out_buf.m_size; + return out_buf.m_pBuf; +} + +size_t tdefl_compress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags) +{ + tdefl_output_buffer out_buf; + MZ_CLEAR_OBJ(out_buf); + if (!pOut_buf) + return 0; + out_buf.m_pBuf = (mz_uint8 *)pOut_buf; + out_buf.m_capacity = out_buf_len; + if (!tdefl_compress_mem_to_output(pSrc_buf, src_buf_len, tdefl_output_buffer_putter, &out_buf, flags)) + return 0; + return out_buf.m_size; +} + +static const mz_uint s_tdefl_num_probes[11] = { 0, 1, 6, 32, 16, 32, 128, 256, 512, 768, 1500 }; + +/* level may actually range from [0,10] (10 is a "hidden" max level, where we want a bit more compression and it's fine if throughput to fall off a cliff on some files). */ +mz_uint tdefl_create_comp_flags_from_zip_params(int level, int window_bits, int strategy) +{ + mz_uint comp_flags = s_tdefl_num_probes[(level >= 0) ? MZ_MIN(10, level) : MZ_DEFAULT_LEVEL] | ((level <= 3) ? TDEFL_GREEDY_PARSING_FLAG : 0); + if (window_bits > 0) + comp_flags |= TDEFL_WRITE_ZLIB_HEADER; + + if (!level) + comp_flags |= TDEFL_FORCE_ALL_RAW_BLOCKS; + else if (strategy == MZ_FILTERED) + comp_flags |= TDEFL_FILTER_MATCHES; + else if (strategy == MZ_HUFFMAN_ONLY) + comp_flags &= ~TDEFL_MAX_PROBES_MASK; + else if (strategy == MZ_FIXED) + comp_flags |= TDEFL_FORCE_ALL_STATIC_BLOCKS; + else if (strategy == MZ_RLE) + comp_flags |= TDEFL_RLE_MATCHES; + + return comp_flags; +} + +#ifdef _MSC_VER +#pragma warning(push) +#pragma warning(disable : 4204) /* nonstandard extension used : non-constant aggregate initializer (also supported by GNU C and C99, so no big deal) */ +#endif + +/* Simple PNG writer function by Alex Evans, 2011. Released into the public domain: https://gist.github.com/908299, more context at + http://altdevblogaday.org/2011/04/06/a-smaller-jpg-encoder/. + This is actually a modification of Alex's original code so PNG files generated by this function pass pngcheck. */ +void *tdefl_write_image_to_png_file_in_memory_ex(const void *pImage, int w, int h, int num_chans, size_t *pLen_out, mz_uint level, mz_bool flip) +{ + /* Using a local copy of this array here in case MINIZ_NO_ZLIB_APIS was defined. */ + static const mz_uint s_tdefl_png_num_probes[11] = { 0, 1, 6, 32, 16, 32, 128, 256, 512, 768, 1500 }; + tdefl_compressor *pComp = (tdefl_compressor *)MZ_MALLOC(sizeof(tdefl_compressor)); + tdefl_output_buffer out_buf; + int i, bpl = w * num_chans, y, z; + mz_uint32 c; + *pLen_out = 0; + if (!pComp) + return NULL; + MZ_CLEAR_OBJ(out_buf); + out_buf.m_expandable = MZ_TRUE; + out_buf.m_capacity = 57 + MZ_MAX(64, (1 + bpl) * h); + if (NULL == (out_buf.m_pBuf = (mz_uint8 *)MZ_MALLOC(out_buf.m_capacity))) + { + MZ_FREE(pComp); + return NULL; + } + /* write dummy header */ + for (z = 41; z; --z) + tdefl_output_buffer_putter(&z, 1, &out_buf); + /* compress image data */ + tdefl_init(pComp, tdefl_output_buffer_putter, &out_buf, s_tdefl_png_num_probes[MZ_MIN(10, level)] | TDEFL_WRITE_ZLIB_HEADER); + for (y = 0; y < h; ++y) + { + tdefl_compress_buffer(pComp, &z, 1, TDEFL_NO_FLUSH); + tdefl_compress_buffer(pComp, (mz_uint8 *)pImage + (flip ? (h - 1 - y) : y) * bpl, bpl, TDEFL_NO_FLUSH); + } + if (tdefl_compress_buffer(pComp, NULL, 0, TDEFL_FINISH) != TDEFL_STATUS_DONE) + { + MZ_FREE(pComp); + MZ_FREE(out_buf.m_pBuf); + return NULL; + } + /* write real header */ + *pLen_out = out_buf.m_size - 41; + { + static const mz_uint8 chans[] = { 0x00, 0x00, 0x04, 0x02, 0x06 }; + mz_uint8 pnghdr[41] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, + 0x0a, 0x1a, 0x0a, 0x00, 0x00, + 0x00, 0x0d, 0x49, 0x48, 0x44, + 0x52, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x08, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x49, 0x44, 0x41, + 0x54 }; + pnghdr[18] = (mz_uint8)(w >> 8); + pnghdr[19] = (mz_uint8)w; + pnghdr[22] = (mz_uint8)(h >> 8); + pnghdr[23] = (mz_uint8)h; + pnghdr[25] = chans[num_chans]; + pnghdr[33] = (mz_uint8)(*pLen_out >> 24); + pnghdr[34] = (mz_uint8)(*pLen_out >> 16); + pnghdr[35] = (mz_uint8)(*pLen_out >> 8); + pnghdr[36] = (mz_uint8)*pLen_out; + c = (mz_uint32)mz_crc32(MZ_CRC32_INIT, pnghdr + 12, 17); + for (i = 0; i < 4; ++i, c <<= 8) + ((mz_uint8 *)(pnghdr + 29))[i] = (mz_uint8)(c >> 24); + memcpy(out_buf.m_pBuf, pnghdr, 41); + } + /* write footer (IDAT CRC-32, followed by IEND chunk) */ + if (!tdefl_output_buffer_putter("\0\0\0\0\0\0\0\0\x49\x45\x4e\x44\xae\x42\x60\x82", 16, &out_buf)) + { + *pLen_out = 0; + MZ_FREE(pComp); + MZ_FREE(out_buf.m_pBuf); + return NULL; + } + c = (mz_uint32)mz_crc32(MZ_CRC32_INIT, out_buf.m_pBuf + 41 - 4, *pLen_out + 4); + for (i = 0; i < 4; ++i, c <<= 8) + (out_buf.m_pBuf + out_buf.m_size - 16)[i] = (mz_uint8)(c >> 24); + /* compute final size of file, grab compressed data buffer and return */ + *pLen_out += 57; + MZ_FREE(pComp); + return out_buf.m_pBuf; +} +void *tdefl_write_image_to_png_file_in_memory(const void *pImage, int w, int h, int num_chans, size_t *pLen_out) +{ + /* Level 6 corresponds to TDEFL_DEFAULT_MAX_PROBES or MZ_DEFAULT_LEVEL (but we can't depend on MZ_DEFAULT_LEVEL being available in case the zlib API's where #defined out) */ + return tdefl_write_image_to_png_file_in_memory_ex(pImage, w, h, num_chans, pLen_out, 6, MZ_FALSE); +} + +#ifndef MINIZ_NO_MALLOC +/* Allocate the tdefl_compressor and tinfl_decompressor structures in C so that */ +/* non-C language bindings to tdefL_ and tinfl_ API don't need to worry about */ +/* structure size and allocation mechanism. */ +tdefl_compressor *tdefl_compressor_alloc() +{ + return (tdefl_compressor *)MZ_MALLOC(sizeof(tdefl_compressor)); +} + +void tdefl_compressor_free(tdefl_compressor *pComp) +{ + MZ_FREE(pComp); +} +#endif + +#ifdef _MSC_VER +#pragma warning(pop) +#endif + +#ifdef __cplusplus +} +#endif +/************************************************************************** + * + * Copyright 2013-2014 RAD Game Tools and Valve Software + * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + **************************************************************************/ + + + +#ifdef __cplusplus +extern "C" { +#endif + +/* ------------------- Low-level Decompression (completely independent from all compression API's) */ + +#define TINFL_MEMCPY(d, s, l) memcpy(d, s, l) +#define TINFL_MEMSET(p, c, l) memset(p, c, l) + +#define TINFL_CR_BEGIN \ + switch (r->m_state) \ + { \ + case 0: +#define TINFL_CR_RETURN(state_index, result) \ + do \ + { \ + status = result; \ + r->m_state = state_index; \ + goto common_exit; \ + case state_index:; \ + } \ + MZ_MACRO_END +#define TINFL_CR_RETURN_FOREVER(state_index, result) \ + do \ + { \ + for (;;) \ + { \ + TINFL_CR_RETURN(state_index, result); \ + } \ + } \ + MZ_MACRO_END +#define TINFL_CR_FINISH } + +#define TINFL_GET_BYTE(state_index, c) \ + do \ + { \ + while (pIn_buf_cur >= pIn_buf_end) \ + { \ + TINFL_CR_RETURN(state_index, (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT) ? TINFL_STATUS_NEEDS_MORE_INPUT : TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS); \ + } \ + c = *pIn_buf_cur++; \ + } \ + MZ_MACRO_END + +#define TINFL_NEED_BITS(state_index, n) \ + do \ + { \ + mz_uint c; \ + TINFL_GET_BYTE(state_index, c); \ + bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); \ + num_bits += 8; \ + } while (num_bits < (mz_uint)(n)) +#define TINFL_SKIP_BITS(state_index, n) \ + do \ + { \ + if (num_bits < (mz_uint)(n)) \ + { \ + TINFL_NEED_BITS(state_index, n); \ + } \ + bit_buf >>= (n); \ + num_bits -= (n); \ + } \ + MZ_MACRO_END +#define TINFL_GET_BITS(state_index, b, n) \ + do \ + { \ + if (num_bits < (mz_uint)(n)) \ + { \ + TINFL_NEED_BITS(state_index, n); \ + } \ + b = bit_buf & ((1 << (n)) - 1); \ + bit_buf >>= (n); \ + num_bits -= (n); \ + } \ + MZ_MACRO_END + +/* TINFL_HUFF_BITBUF_FILL() is only used rarely, when the number of bytes remaining in the input buffer falls below 2. */ +/* It reads just enough bytes from the input stream that are needed to decode the next Huffman code (and absolutely no more). It works by trying to fully decode a */ +/* Huffman code by using whatever bits are currently present in the bit buffer. If this fails, it reads another byte, and tries again until it succeeds or until the */ +/* bit buffer contains >=15 bits (deflate's max. Huffman code size). */ +#define TINFL_HUFF_BITBUF_FILL(state_index, pHuff) \ + do \ + { \ + temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]; \ + if (temp >= 0) \ + { \ + code_len = temp >> 9; \ + if ((code_len) && (num_bits >= code_len)) \ + break; \ + } \ + else if (num_bits > TINFL_FAST_LOOKUP_BITS) \ + { \ + code_len = TINFL_FAST_LOOKUP_BITS; \ + do \ + { \ + temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; \ + } while ((temp < 0) && (num_bits >= (code_len + 1))); \ + if (temp >= 0) \ + break; \ + } \ + TINFL_GET_BYTE(state_index, c); \ + bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); \ + num_bits += 8; \ + } while (num_bits < 15); + +/* TINFL_HUFF_DECODE() decodes the next Huffman coded symbol. It's more complex than you would initially expect because the zlib API expects the decompressor to never read */ +/* beyond the final byte of the deflate stream. (In other words, when this macro wants to read another byte from the input, it REALLY needs another byte in order to fully */ +/* decode the next Huffman code.) Handling this properly is particularly important on raw deflate (non-zlib) streams, which aren't followed by a byte aligned adler-32. */ +/* The slow path is only executed at the very end of the input buffer. */ +/* v1.16: The original macro handled the case at the very end of the passed-in input buffer, but we also need to handle the case where the user passes in 1+zillion bytes */ +/* following the deflate data and our non-conservative read-ahead path won't kick in here on this code. This is much trickier. */ +#define TINFL_HUFF_DECODE(state_index, sym, pHuff) \ + do \ + { \ + int temp; \ + mz_uint code_len, c; \ + if (num_bits < 15) \ + { \ + if ((pIn_buf_end - pIn_buf_cur) < 2) \ + { \ + TINFL_HUFF_BITBUF_FILL(state_index, pHuff); \ + } \ + else \ + { \ + bit_buf |= (((tinfl_bit_buf_t)pIn_buf_cur[0]) << num_bits) | (((tinfl_bit_buf_t)pIn_buf_cur[1]) << (num_bits + 8)); \ + pIn_buf_cur += 2; \ + num_bits += 16; \ + } \ + } \ + if ((temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) \ + code_len = temp >> 9, temp &= 511; \ + else \ + { \ + code_len = TINFL_FAST_LOOKUP_BITS; \ + do \ + { \ + temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; \ + } while (temp < 0); \ + } \ + sym = temp; \ + bit_buf >>= code_len; \ + num_bits -= code_len; \ + } \ + MZ_MACRO_END + +tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags) +{ + static const int s_length_base[31] = { 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0 }; + static const int s_length_extra[31] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0 }; + static const int s_dist_base[32] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0, 0 }; + static const int s_dist_extra[32] = { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13 }; + static const mz_uint8 s_length_dezigzag[19] = { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 }; + static const int s_min_table_sizes[3] = { 257, 1, 4 }; + + tinfl_status status = TINFL_STATUS_FAILED; + mz_uint32 num_bits, dist, counter, num_extra; + tinfl_bit_buf_t bit_buf; + const mz_uint8 *pIn_buf_cur = pIn_buf_next, *const pIn_buf_end = pIn_buf_next + *pIn_buf_size; + mz_uint8 *pOut_buf_cur = pOut_buf_next, *const pOut_buf_end = pOut_buf_next + *pOut_buf_size; + size_t out_buf_size_mask = (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF) ? (size_t)-1 : ((pOut_buf_next - pOut_buf_start) + *pOut_buf_size) - 1, dist_from_out_buf_start; + + /* Ensure the output buffer's size is a power of 2, unless the output buffer is large enough to hold the entire output file (in which case it doesn't matter). */ + if (((out_buf_size_mask + 1) & out_buf_size_mask) || (pOut_buf_next < pOut_buf_start)) + { + *pIn_buf_size = *pOut_buf_size = 0; + return TINFL_STATUS_BAD_PARAM; + } + + num_bits = r->m_num_bits; + bit_buf = r->m_bit_buf; + dist = r->m_dist; + counter = r->m_counter; + num_extra = r->m_num_extra; + dist_from_out_buf_start = r->m_dist_from_out_buf_start; + TINFL_CR_BEGIN + + bit_buf = num_bits = dist = counter = num_extra = r->m_zhdr0 = r->m_zhdr1 = 0; + r->m_z_adler32 = r->m_check_adler32 = 1; + if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER) + { + TINFL_GET_BYTE(1, r->m_zhdr0); + TINFL_GET_BYTE(2, r->m_zhdr1); + counter = (((r->m_zhdr0 * 256 + r->m_zhdr1) % 31 != 0) || (r->m_zhdr1 & 32) || ((r->m_zhdr0 & 15) != 8)); + if (!(decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)) + counter |= (((1U << (8U + (r->m_zhdr0 >> 4))) > 32768U) || ((out_buf_size_mask + 1) < (size_t)(1U << (8U + (r->m_zhdr0 >> 4))))); + if (counter) + { + TINFL_CR_RETURN_FOREVER(36, TINFL_STATUS_FAILED); + } + } + + do + { + TINFL_GET_BITS(3, r->m_final, 3); + r->m_type = r->m_final >> 1; + if (r->m_type == 0) + { + TINFL_SKIP_BITS(5, num_bits & 7); + for (counter = 0; counter < 4; ++counter) + { + if (num_bits) + TINFL_GET_BITS(6, r->m_raw_header[counter], 8); + else + TINFL_GET_BYTE(7, r->m_raw_header[counter]); + } + if ((counter = (r->m_raw_header[0] | (r->m_raw_header[1] << 8))) != (mz_uint)(0xFFFF ^ (r->m_raw_header[2] | (r->m_raw_header[3] << 8)))) + { + TINFL_CR_RETURN_FOREVER(39, TINFL_STATUS_FAILED); + } + while ((counter) && (num_bits)) + { + TINFL_GET_BITS(51, dist, 8); + while (pOut_buf_cur >= pOut_buf_end) + { + TINFL_CR_RETURN(52, TINFL_STATUS_HAS_MORE_OUTPUT); + } + *pOut_buf_cur++ = (mz_uint8)dist; + counter--; + } + while (counter) + { + size_t n; + while (pOut_buf_cur >= pOut_buf_end) + { + TINFL_CR_RETURN(9, TINFL_STATUS_HAS_MORE_OUTPUT); + } + while (pIn_buf_cur >= pIn_buf_end) + { + TINFL_CR_RETURN(38, (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT) ? TINFL_STATUS_NEEDS_MORE_INPUT : TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS); + } + n = MZ_MIN(MZ_MIN((size_t)(pOut_buf_end - pOut_buf_cur), (size_t)(pIn_buf_end - pIn_buf_cur)), counter); + TINFL_MEMCPY(pOut_buf_cur, pIn_buf_cur, n); + pIn_buf_cur += n; + pOut_buf_cur += n; + counter -= (mz_uint)n; + } + } + else if (r->m_type == 3) + { + TINFL_CR_RETURN_FOREVER(10, TINFL_STATUS_FAILED); + } + else + { + if (r->m_type == 1) + { + mz_uint8 *p = r->m_tables[0].m_code_size; + mz_uint i; + r->m_table_sizes[0] = 288; + r->m_table_sizes[1] = 32; + TINFL_MEMSET(r->m_tables[1].m_code_size, 5, 32); + for (i = 0; i <= 143; ++i) + *p++ = 8; + for (; i <= 255; ++i) + *p++ = 9; + for (; i <= 279; ++i) + *p++ = 7; + for (; i <= 287; ++i) + *p++ = 8; + } + else + { + for (counter = 0; counter < 3; counter++) + { + TINFL_GET_BITS(11, r->m_table_sizes[counter], "\05\05\04"[counter]); + r->m_table_sizes[counter] += s_min_table_sizes[counter]; + } + MZ_CLEAR_OBJ(r->m_tables[2].m_code_size); + for (counter = 0; counter < r->m_table_sizes[2]; counter++) + { + mz_uint s; + TINFL_GET_BITS(14, s, 3); + r->m_tables[2].m_code_size[s_length_dezigzag[counter]] = (mz_uint8)s; + } + r->m_table_sizes[2] = 19; + } + for (; (int)r->m_type >= 0; r->m_type--) + { + int tree_next, tree_cur; + tinfl_huff_table *pTable; + mz_uint i, j, used_syms, total, sym_index, next_code[17], total_syms[16]; + pTable = &r->m_tables[r->m_type]; + MZ_CLEAR_OBJ(total_syms); + MZ_CLEAR_OBJ(pTable->m_look_up); + MZ_CLEAR_OBJ(pTable->m_tree); + for (i = 0; i < r->m_table_sizes[r->m_type]; ++i) + total_syms[pTable->m_code_size[i]]++; + used_syms = 0, total = 0; + next_code[0] = next_code[1] = 0; + for (i = 1; i <= 15; ++i) + { + used_syms += total_syms[i]; + next_code[i + 1] = (total = ((total + total_syms[i]) << 1)); + } + if ((65536 != total) && (used_syms > 1)) + { + TINFL_CR_RETURN_FOREVER(35, TINFL_STATUS_FAILED); + } + for (tree_next = -1, sym_index = 0; sym_index < r->m_table_sizes[r->m_type]; ++sym_index) + { + mz_uint rev_code = 0, l, cur_code, code_size = pTable->m_code_size[sym_index]; + if (!code_size) + continue; + cur_code = next_code[code_size]++; + for (l = code_size; l > 0; l--, cur_code >>= 1) + rev_code = (rev_code << 1) | (cur_code & 1); + if (code_size <= TINFL_FAST_LOOKUP_BITS) + { + mz_int16 k = (mz_int16)((code_size << 9) | sym_index); + while (rev_code < TINFL_FAST_LOOKUP_SIZE) + { + pTable->m_look_up[rev_code] = k; + rev_code += (1 << code_size); + } + continue; + } + if (0 == (tree_cur = pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)])) + { + pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)] = (mz_int16)tree_next; + tree_cur = tree_next; + tree_next -= 2; + } + rev_code >>= (TINFL_FAST_LOOKUP_BITS - 1); + for (j = code_size; j > (TINFL_FAST_LOOKUP_BITS + 1); j--) + { + tree_cur -= ((rev_code >>= 1) & 1); + if (!pTable->m_tree[-tree_cur - 1]) + { + pTable->m_tree[-tree_cur - 1] = (mz_int16)tree_next; + tree_cur = tree_next; + tree_next -= 2; + } + else + tree_cur = pTable->m_tree[-tree_cur - 1]; + } + tree_cur -= ((rev_code >>= 1) & 1); + pTable->m_tree[-tree_cur - 1] = (mz_int16)sym_index; + } + if (r->m_type == 2) + { + for (counter = 0; counter < (r->m_table_sizes[0] + r->m_table_sizes[1]);) + { + mz_uint s; + TINFL_HUFF_DECODE(16, dist, &r->m_tables[2]); + if (dist < 16) + { + r->m_len_codes[counter++] = (mz_uint8)dist; + continue; + } + if ((dist == 16) && (!counter)) + { + TINFL_CR_RETURN_FOREVER(17, TINFL_STATUS_FAILED); + } + num_extra = "\02\03\07"[dist - 16]; + TINFL_GET_BITS(18, s, num_extra); + s += "\03\03\013"[dist - 16]; + TINFL_MEMSET(r->m_len_codes + counter, (dist == 16) ? r->m_len_codes[counter - 1] : 0, s); + counter += s; + } + if ((r->m_table_sizes[0] + r->m_table_sizes[1]) != counter) + { + TINFL_CR_RETURN_FOREVER(21, TINFL_STATUS_FAILED); + } + TINFL_MEMCPY(r->m_tables[0].m_code_size, r->m_len_codes, r->m_table_sizes[0]); + TINFL_MEMCPY(r->m_tables[1].m_code_size, r->m_len_codes + r->m_table_sizes[0], r->m_table_sizes[1]); + } + } + for (;;) + { + mz_uint8 *pSrc; + for (;;) + { + if (((pIn_buf_end - pIn_buf_cur) < 4) || ((pOut_buf_end - pOut_buf_cur) < 2)) + { + TINFL_HUFF_DECODE(23, counter, &r->m_tables[0]); + if (counter >= 256) + break; + while (pOut_buf_cur >= pOut_buf_end) + { + TINFL_CR_RETURN(24, TINFL_STATUS_HAS_MORE_OUTPUT); + } + *pOut_buf_cur++ = (mz_uint8)counter; + } + else + { + int sym2; + mz_uint code_len; +#if TINFL_USE_64BIT_BITBUF + if (num_bits < 30) + { + bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE32(pIn_buf_cur)) << num_bits); + pIn_buf_cur += 4; + num_bits += 32; + } +#else + if (num_bits < 15) + { + bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); + pIn_buf_cur += 2; + num_bits += 16; + } +#endif + if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) + code_len = sym2 >> 9; + else + { + code_len = TINFL_FAST_LOOKUP_BITS; + do + { + sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; + } while (sym2 < 0); + } + counter = sym2; + bit_buf >>= code_len; + num_bits -= code_len; + if (counter & 256) + break; + +#if !TINFL_USE_64BIT_BITBUF + if (num_bits < 15) + { + bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); + pIn_buf_cur += 2; + num_bits += 16; + } +#endif + if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) + code_len = sym2 >> 9; + else + { + code_len = TINFL_FAST_LOOKUP_BITS; + do + { + sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; + } while (sym2 < 0); + } + bit_buf >>= code_len; + num_bits -= code_len; + + pOut_buf_cur[0] = (mz_uint8)counter; + if (sym2 & 256) + { + pOut_buf_cur++; + counter = sym2; + break; + } + pOut_buf_cur[1] = (mz_uint8)sym2; + pOut_buf_cur += 2; + } + } + if ((counter &= 511) == 256) + break; + + num_extra = s_length_extra[counter - 257]; + counter = s_length_base[counter - 257]; + if (num_extra) + { + mz_uint extra_bits; + TINFL_GET_BITS(25, extra_bits, num_extra); + counter += extra_bits; + } + + TINFL_HUFF_DECODE(26, dist, &r->m_tables[1]); + num_extra = s_dist_extra[dist]; + dist = s_dist_base[dist]; + if (num_extra) + { + mz_uint extra_bits; + TINFL_GET_BITS(27, extra_bits, num_extra); + dist += extra_bits; + } + + dist_from_out_buf_start = pOut_buf_cur - pOut_buf_start; + if ((dist > dist_from_out_buf_start) && (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)) + { + TINFL_CR_RETURN_FOREVER(37, TINFL_STATUS_FAILED); + } + + pSrc = pOut_buf_start + ((dist_from_out_buf_start - dist) & out_buf_size_mask); + + if ((MZ_MAX(pOut_buf_cur, pSrc) + counter) > pOut_buf_end) + { + while (counter--) + { + while (pOut_buf_cur >= pOut_buf_end) + { + TINFL_CR_RETURN(53, TINFL_STATUS_HAS_MORE_OUTPUT); + } + *pOut_buf_cur++ = pOut_buf_start[(dist_from_out_buf_start++ - dist) & out_buf_size_mask]; + } + continue; + } +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES + else if ((counter >= 9) && (counter <= dist)) + { + const mz_uint8 *pSrc_end = pSrc + (counter & ~7); + do + { +#ifdef MINIZ_UNALIGNED_USE_MEMCPY + memcpy(pOut_buf_cur, pSrc, sizeof(mz_uint32)*2); +#else + ((mz_uint32 *)pOut_buf_cur)[0] = ((const mz_uint32 *)pSrc)[0]; + ((mz_uint32 *)pOut_buf_cur)[1] = ((const mz_uint32 *)pSrc)[1]; +#endif + pOut_buf_cur += 8; + } while ((pSrc += 8) < pSrc_end); + if ((counter &= 7) < 3) + { + if (counter) + { + pOut_buf_cur[0] = pSrc[0]; + if (counter > 1) + pOut_buf_cur[1] = pSrc[1]; + pOut_buf_cur += counter; + } + continue; + } + } +#endif + while(counter>2) + { + pOut_buf_cur[0] = pSrc[0]; + pOut_buf_cur[1] = pSrc[1]; + pOut_buf_cur[2] = pSrc[2]; + pOut_buf_cur += 3; + pSrc += 3; + counter -= 3; + } + if (counter > 0) + { + pOut_buf_cur[0] = pSrc[0]; + if (counter > 1) + pOut_buf_cur[1] = pSrc[1]; + pOut_buf_cur += counter; + } + } + } + } while (!(r->m_final & 1)); + + /* Ensure byte alignment and put back any bytes from the bitbuf if we've looked ahead too far on gzip, or other Deflate streams followed by arbitrary data. */ + /* I'm being super conservative here. A number of simplifications can be made to the byte alignment part, and the Adler32 check shouldn't ever need to worry about reading from the bitbuf now. */ + TINFL_SKIP_BITS(32, num_bits & 7); + while ((pIn_buf_cur > pIn_buf_next) && (num_bits >= 8)) + { + --pIn_buf_cur; + num_bits -= 8; + } + bit_buf &= (tinfl_bit_buf_t)((((mz_uint64)1) << num_bits) - (mz_uint64)1); + MZ_ASSERT(!num_bits); /* if this assert fires then we've read beyond the end of non-deflate/zlib streams with following data (such as gzip streams). */ + + if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER) + { + for (counter = 0; counter < 4; ++counter) + { + mz_uint s; + if (num_bits) + TINFL_GET_BITS(41, s, 8); + else + TINFL_GET_BYTE(42, s); + r->m_z_adler32 = (r->m_z_adler32 << 8) | s; + } + } + TINFL_CR_RETURN_FOREVER(34, TINFL_STATUS_DONE); + + TINFL_CR_FINISH + +common_exit: + /* As long as we aren't telling the caller that we NEED more input to make forward progress: */ + /* Put back any bytes from the bitbuf in case we've looked ahead too far on gzip, or other Deflate streams followed by arbitrary data. */ + /* We need to be very careful here to NOT push back any bytes we definitely know we need to make forward progress, though, or we'll lock the caller up into an inf loop. */ + if ((status != TINFL_STATUS_NEEDS_MORE_INPUT) && (status != TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS)) + { + while ((pIn_buf_cur > pIn_buf_next) && (num_bits >= 8)) + { + --pIn_buf_cur; + num_bits -= 8; + } + } + r->m_num_bits = num_bits; + r->m_bit_buf = bit_buf & (tinfl_bit_buf_t)((((mz_uint64)1) << num_bits) - (mz_uint64)1); + r->m_dist = dist; + r->m_counter = counter; + r->m_num_extra = num_extra; + r->m_dist_from_out_buf_start = dist_from_out_buf_start; + *pIn_buf_size = pIn_buf_cur - pIn_buf_next; + *pOut_buf_size = pOut_buf_cur - pOut_buf_next; + if ((decomp_flags & (TINFL_FLAG_PARSE_ZLIB_HEADER | TINFL_FLAG_COMPUTE_ADLER32)) && (status >= 0)) + { + const mz_uint8 *ptr = pOut_buf_next; + size_t buf_len = *pOut_buf_size; + mz_uint32 i, s1 = r->m_check_adler32 & 0xffff, s2 = r->m_check_adler32 >> 16; + size_t block_len = buf_len % 5552; + while (buf_len) + { + for (i = 0; i + 7 < block_len; i += 8, ptr += 8) + { + s1 += ptr[0], s2 += s1; + s1 += ptr[1], s2 += s1; + s1 += ptr[2], s2 += s1; + s1 += ptr[3], s2 += s1; + s1 += ptr[4], s2 += s1; + s1 += ptr[5], s2 += s1; + s1 += ptr[6], s2 += s1; + s1 += ptr[7], s2 += s1; + } + for (; i < block_len; ++i) + s1 += *ptr++, s2 += s1; + s1 %= 65521U, s2 %= 65521U; + buf_len -= block_len; + block_len = 5552; + } + r->m_check_adler32 = (s2 << 16) + s1; + if ((status == TINFL_STATUS_DONE) && (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER) && (r->m_check_adler32 != r->m_z_adler32)) + status = TINFL_STATUS_ADLER32_MISMATCH; + } + return status; +} + +/* Higher level helper functions. */ +void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags) +{ + tinfl_decompressor decomp; + void *pBuf = NULL, *pNew_buf; + size_t src_buf_ofs = 0, out_buf_capacity = 0; + *pOut_len = 0; + tinfl_init(&decomp); + for (;;) + { + size_t src_buf_size = src_buf_len - src_buf_ofs, dst_buf_size = out_buf_capacity - *pOut_len, new_out_buf_capacity; + tinfl_status status = tinfl_decompress(&decomp, (const mz_uint8 *)pSrc_buf + src_buf_ofs, &src_buf_size, (mz_uint8 *)pBuf, pBuf ? (mz_uint8 *)pBuf + *pOut_len : NULL, &dst_buf_size, + (flags & ~TINFL_FLAG_HAS_MORE_INPUT) | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF); + if ((status < 0) || (status == TINFL_STATUS_NEEDS_MORE_INPUT)) + { + MZ_FREE(pBuf); + *pOut_len = 0; + return NULL; + } + src_buf_ofs += src_buf_size; + *pOut_len += dst_buf_size; + if (status == TINFL_STATUS_DONE) + break; + new_out_buf_capacity = out_buf_capacity * 2; + if (new_out_buf_capacity < 128) + new_out_buf_capacity = 128; + pNew_buf = MZ_REALLOC(pBuf, new_out_buf_capacity); + if (!pNew_buf) + { + MZ_FREE(pBuf); + *pOut_len = 0; + return NULL; + } + pBuf = pNew_buf; + out_buf_capacity = new_out_buf_capacity; + } + return pBuf; +} + +size_t tinfl_decompress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags) +{ + tinfl_decompressor decomp; + tinfl_status status; + tinfl_init(&decomp); + status = tinfl_decompress(&decomp, (const mz_uint8 *)pSrc_buf, &src_buf_len, (mz_uint8 *)pOut_buf, (mz_uint8 *)pOut_buf, &out_buf_len, (flags & ~TINFL_FLAG_HAS_MORE_INPUT) | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF); + return (status != TINFL_STATUS_DONE) ? TINFL_DECOMPRESS_MEM_TO_MEM_FAILED : out_buf_len; +} + +int tinfl_decompress_mem_to_callback(const void *pIn_buf, size_t *pIn_buf_size, tinfl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags) +{ + int result = 0; + tinfl_decompressor decomp; + mz_uint8 *pDict = (mz_uint8 *)MZ_MALLOC(TINFL_LZ_DICT_SIZE); + size_t in_buf_ofs = 0, dict_ofs = 0; + if (!pDict) + return TINFL_STATUS_FAILED; + tinfl_init(&decomp); + for (;;) + { + size_t in_buf_size = *pIn_buf_size - in_buf_ofs, dst_buf_size = TINFL_LZ_DICT_SIZE - dict_ofs; + tinfl_status status = tinfl_decompress(&decomp, (const mz_uint8 *)pIn_buf + in_buf_ofs, &in_buf_size, pDict, pDict + dict_ofs, &dst_buf_size, + (flags & ~(TINFL_FLAG_HAS_MORE_INPUT | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF))); + in_buf_ofs += in_buf_size; + if ((dst_buf_size) && (!(*pPut_buf_func)(pDict + dict_ofs, (int)dst_buf_size, pPut_buf_user))) + break; + if (status != TINFL_STATUS_HAS_MORE_OUTPUT) + { + result = (status == TINFL_STATUS_DONE); + break; + } + dict_ofs = (dict_ofs + dst_buf_size) & (TINFL_LZ_DICT_SIZE - 1); + } + MZ_FREE(pDict); + *pIn_buf_size = in_buf_ofs; + return result; +} + +#ifndef MINIZ_NO_MALLOC +tinfl_decompressor *tinfl_decompressor_alloc() +{ + tinfl_decompressor *pDecomp = (tinfl_decompressor *)MZ_MALLOC(sizeof(tinfl_decompressor)); + if (pDecomp) + tinfl_init(pDecomp); + return pDecomp; +} + +void tinfl_decompressor_free(tinfl_decompressor *pDecomp) +{ + MZ_FREE(pDecomp); +} +#endif + +#ifdef __cplusplus +} +#endif +/************************************************************************** + * + * Copyright 2013-2014 RAD Game Tools and Valve Software + * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC + * Copyright 2016 Martin Raiber + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + **************************************************************************/ + + +#ifndef MINIZ_NO_ARCHIVE_APIS + +#ifdef __cplusplus +extern "C" { +#endif + +/* ------------------- .ZIP archive reading */ + +#ifdef MINIZ_NO_STDIO +#define MZ_FILE void * +#else +#include + +#if defined(_MSC_VER) || defined(__MINGW64__) +static FILE *mz_fopen(const char *pFilename, const char *pMode) +{ + FILE *pFile = NULL; + fopen_s(&pFile, pFilename, pMode); + return pFile; +} +static FILE *mz_freopen(const char *pPath, const char *pMode, FILE *pStream) +{ + FILE *pFile = NULL; + if (freopen_s(&pFile, pPath, pMode, pStream)) + return NULL; + return pFile; +} +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN mz_fopen +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#define MZ_FTELL64 _ftelli64 +#define MZ_FSEEK64 _fseeki64 +#define MZ_FILE_STAT_STRUCT _stat64 +#define MZ_FILE_STAT _stat64 +#define MZ_FFLUSH fflush +#define MZ_FREOPEN mz_freopen +#define MZ_DELETE_FILE remove +#elif defined(__MINGW32__) +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN(f, m) fopen(f, m) +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#define MZ_FTELL64 ftello64 +#define MZ_FSEEK64 fseeko64 +#define MZ_FILE_STAT_STRUCT _stat +#define MZ_FILE_STAT _stat +#define MZ_FFLUSH fflush +#define MZ_FREOPEN(f, m, s) freopen(f, m, s) +#define MZ_DELETE_FILE remove +#elif defined(__TINYC__) +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN(f, m) fopen(f, m) +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#define MZ_FTELL64 ftell +#define MZ_FSEEK64 fseek +#define MZ_FILE_STAT_STRUCT stat +#define MZ_FILE_STAT stat +#define MZ_FFLUSH fflush +#define MZ_FREOPEN(f, m, s) freopen(f, m, s) +#define MZ_DELETE_FILE remove +#elif defined(__GNUC__) && defined(_LARGEFILE64_SOURCE) +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN(f, m) fopen64(f, m) +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#define MZ_FTELL64 ftello64 +#define MZ_FSEEK64 fseeko64 +#define MZ_FILE_STAT_STRUCT stat64 +#define MZ_FILE_STAT stat64 +#define MZ_FFLUSH fflush +#define MZ_FREOPEN(p, m, s) freopen64(p, m, s) +#define MZ_DELETE_FILE remove +#elif defined(__APPLE__) +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN(f, m) fopen(f, m) +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#define MZ_FTELL64 ftello +#define MZ_FSEEK64 fseeko +#define MZ_FILE_STAT_STRUCT stat +#define MZ_FILE_STAT stat +#define MZ_FFLUSH fflush +#define MZ_FREOPEN(p, m, s) freopen(p, m, s) +#define MZ_DELETE_FILE remove + +#else +#pragma message("Using fopen, ftello, fseeko, stat() etc. path for file I/O - this path may not support large files.") +#ifndef MINIZ_NO_TIME +#include +#endif +#define MZ_FOPEN(f, m) fopen(f, m) +#define MZ_FCLOSE fclose +#define MZ_FREAD fread +#define MZ_FWRITE fwrite +#ifdef __STRICT_ANSI__ +#define MZ_FTELL64 ftell +#define MZ_FSEEK64 fseek +#else +#define MZ_FTELL64 ftello +#define MZ_FSEEK64 fseeko +#endif +#define MZ_FILE_STAT_STRUCT stat +#define MZ_FILE_STAT stat +#define MZ_FFLUSH fflush +#define MZ_FREOPEN(f, m, s) freopen(f, m, s) +#define MZ_DELETE_FILE remove +#endif /* #ifdef _MSC_VER */ +#endif /* #ifdef MINIZ_NO_STDIO */ + +#define MZ_TOLOWER(c) ((((c) >= 'A') && ((c) <= 'Z')) ? ((c) - 'A' + 'a') : (c)) + +/* Various ZIP archive enums. To completely avoid cross platform compiler alignment and platform endian issues, miniz.c doesn't use structs for any of this stuff. */ +enum +{ + /* ZIP archive identifiers and record sizes */ + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG = 0x06054b50, + MZ_ZIP_CENTRAL_DIR_HEADER_SIG = 0x02014b50, + MZ_ZIP_LOCAL_DIR_HEADER_SIG = 0x04034b50, + MZ_ZIP_LOCAL_DIR_HEADER_SIZE = 30, + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE = 46, + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE = 22, + + /* ZIP64 archive identifier and record sizes */ + MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG = 0x06064b50, + MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG = 0x07064b50, + MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE = 56, + MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE = 20, + MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID = 0x0001, + MZ_ZIP_DATA_DESCRIPTOR_ID = 0x08074b50, + MZ_ZIP_DATA_DESCRIPTER_SIZE64 = 24, + MZ_ZIP_DATA_DESCRIPTER_SIZE32 = 16, + + /* Central directory header record offsets */ + MZ_ZIP_CDH_SIG_OFS = 0, + MZ_ZIP_CDH_VERSION_MADE_BY_OFS = 4, + MZ_ZIP_CDH_VERSION_NEEDED_OFS = 6, + MZ_ZIP_CDH_BIT_FLAG_OFS = 8, + MZ_ZIP_CDH_METHOD_OFS = 10, + MZ_ZIP_CDH_FILE_TIME_OFS = 12, + MZ_ZIP_CDH_FILE_DATE_OFS = 14, + MZ_ZIP_CDH_CRC32_OFS = 16, + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS = 20, + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS = 24, + MZ_ZIP_CDH_FILENAME_LEN_OFS = 28, + MZ_ZIP_CDH_EXTRA_LEN_OFS = 30, + MZ_ZIP_CDH_COMMENT_LEN_OFS = 32, + MZ_ZIP_CDH_DISK_START_OFS = 34, + MZ_ZIP_CDH_INTERNAL_ATTR_OFS = 36, + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS = 38, + MZ_ZIP_CDH_LOCAL_HEADER_OFS = 42, + + /* Local directory header offsets */ + MZ_ZIP_LDH_SIG_OFS = 0, + MZ_ZIP_LDH_VERSION_NEEDED_OFS = 4, + MZ_ZIP_LDH_BIT_FLAG_OFS = 6, + MZ_ZIP_LDH_METHOD_OFS = 8, + MZ_ZIP_LDH_FILE_TIME_OFS = 10, + MZ_ZIP_LDH_FILE_DATE_OFS = 12, + MZ_ZIP_LDH_CRC32_OFS = 14, + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS = 18, + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS = 22, + MZ_ZIP_LDH_FILENAME_LEN_OFS = 26, + MZ_ZIP_LDH_EXTRA_LEN_OFS = 28, + MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR = 1 << 3, + + /* End of central directory offsets */ + MZ_ZIP_ECDH_SIG_OFS = 0, + MZ_ZIP_ECDH_NUM_THIS_DISK_OFS = 4, + MZ_ZIP_ECDH_NUM_DISK_CDIR_OFS = 6, + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS = 8, + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS = 10, + MZ_ZIP_ECDH_CDIR_SIZE_OFS = 12, + MZ_ZIP_ECDH_CDIR_OFS_OFS = 16, + MZ_ZIP_ECDH_COMMENT_SIZE_OFS = 20, + + /* ZIP64 End of central directory locator offsets */ + MZ_ZIP64_ECDL_SIG_OFS = 0, /* 4 bytes */ + MZ_ZIP64_ECDL_NUM_DISK_CDIR_OFS = 4, /* 4 bytes */ + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS = 8, /* 8 bytes */ + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS = 16, /* 4 bytes */ + + /* ZIP64 End of central directory header offsets */ + MZ_ZIP64_ECDH_SIG_OFS = 0, /* 4 bytes */ + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS = 4, /* 8 bytes */ + MZ_ZIP64_ECDH_VERSION_MADE_BY_OFS = 12, /* 2 bytes */ + MZ_ZIP64_ECDH_VERSION_NEEDED_OFS = 14, /* 2 bytes */ + MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS = 16, /* 4 bytes */ + MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS = 20, /* 4 bytes */ + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS = 24, /* 8 bytes */ + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS = 32, /* 8 bytes */ + MZ_ZIP64_ECDH_CDIR_SIZE_OFS = 40, /* 8 bytes */ + MZ_ZIP64_ECDH_CDIR_OFS_OFS = 48, /* 8 bytes */ + MZ_ZIP_VERSION_MADE_BY_DOS_FILESYSTEM_ID = 0, + MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG = 0x10, + MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED = 1, + MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG = 32, + MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION = 64, + MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED = 8192, + MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8 = 1 << 11 +}; + +typedef struct +{ + void *m_p; + size_t m_size, m_capacity; + mz_uint m_element_size; +} mz_zip_array; + +struct mz_zip_internal_state_tag +{ + mz_zip_array m_central_dir; + mz_zip_array m_central_dir_offsets; + mz_zip_array m_sorted_central_dir_offsets; + + /* The flags passed in when the archive is initially opened. */ + uint32_t m_init_flags; + + /* MZ_TRUE if the archive has a zip64 end of central directory headers, etc. */ + mz_bool m_zip64; + + /* MZ_TRUE if we found zip64 extended info in the central directory (m_zip64 will also be slammed to true too, even if we didn't find a zip64 end of central dir header, etc.) */ + mz_bool m_zip64_has_extended_info_fields; + + /* These fields are used by the file, FILE, memory, and memory/heap read/write helpers. */ + MZ_FILE *m_pFile; + mz_uint64 m_file_archive_start_ofs; + + void *m_pMem; + size_t m_mem_size; + size_t m_mem_capacity; +}; + +#define MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(array_ptr, element_size) (array_ptr)->m_element_size = element_size + +#if defined(DEBUG) || defined(_DEBUG) || defined(NDEBUG) +static MZ_FORCEINLINE mz_uint mz_zip_array_range_check(const mz_zip_array *pArray, mz_uint index) +{ + MZ_ASSERT(index < pArray->m_size); + return index; +} +#define MZ_ZIP_ARRAY_ELEMENT(array_ptr, element_type, index) ((element_type *)((array_ptr)->m_p))[mz_zip_array_range_check(array_ptr, index)] +#else +#define MZ_ZIP_ARRAY_ELEMENT(array_ptr, element_type, index) ((element_type *)((array_ptr)->m_p))[index] +#endif + +static MZ_FORCEINLINE void mz_zip_array_init(mz_zip_array *pArray, mz_uint32 element_size) +{ + memset(pArray, 0, sizeof(mz_zip_array)); + pArray->m_element_size = element_size; +} + +static MZ_FORCEINLINE void mz_zip_array_clear(mz_zip_archive *pZip, mz_zip_array *pArray) +{ + pZip->m_pFree(pZip->m_pAlloc_opaque, pArray->m_p); + memset(pArray, 0, sizeof(mz_zip_array)); +} + +static mz_bool mz_zip_array_ensure_capacity(mz_zip_archive *pZip, mz_zip_array *pArray, size_t min_new_capacity, mz_uint growing) +{ + void *pNew_p; + size_t new_capacity = min_new_capacity; + MZ_ASSERT(pArray->m_element_size); + if (pArray->m_capacity >= min_new_capacity) + return MZ_TRUE; + if (growing) + { + new_capacity = MZ_MAX(1, pArray->m_capacity); + while (new_capacity < min_new_capacity) + new_capacity *= 2; + } + if (NULL == (pNew_p = pZip->m_pRealloc(pZip->m_pAlloc_opaque, pArray->m_p, pArray->m_element_size, new_capacity))) + return MZ_FALSE; + pArray->m_p = pNew_p; + pArray->m_capacity = new_capacity; + return MZ_TRUE; +} + +static MZ_FORCEINLINE mz_bool mz_zip_array_reserve(mz_zip_archive *pZip, mz_zip_array *pArray, size_t new_capacity, mz_uint growing) +{ + if (new_capacity > pArray->m_capacity) + { + if (!mz_zip_array_ensure_capacity(pZip, pArray, new_capacity, growing)) + return MZ_FALSE; + } + return MZ_TRUE; +} + +static MZ_FORCEINLINE mz_bool mz_zip_array_resize(mz_zip_archive *pZip, mz_zip_array *pArray, size_t new_size, mz_uint growing) +{ + if (new_size > pArray->m_capacity) + { + if (!mz_zip_array_ensure_capacity(pZip, pArray, new_size, growing)) + return MZ_FALSE; + } + pArray->m_size = new_size; + return MZ_TRUE; +} + +static MZ_FORCEINLINE mz_bool mz_zip_array_ensure_room(mz_zip_archive *pZip, mz_zip_array *pArray, size_t n) +{ + return mz_zip_array_reserve(pZip, pArray, pArray->m_size + n, MZ_TRUE); +} + +static MZ_FORCEINLINE mz_bool mz_zip_array_push_back(mz_zip_archive *pZip, mz_zip_array *pArray, const void *pElements, size_t n) +{ + size_t orig_size = pArray->m_size; + if (!mz_zip_array_resize(pZip, pArray, orig_size + n, MZ_TRUE)) + return MZ_FALSE; + if (n > 0) + memcpy((mz_uint8 *)pArray->m_p + orig_size * pArray->m_element_size, pElements, n * pArray->m_element_size); + return MZ_TRUE; +} + +#ifndef MINIZ_NO_TIME +static MZ_TIME_T mz_zip_dos_to_time_t(int dos_time, int dos_date) +{ + struct tm tm; + memset(&tm, 0, sizeof(tm)); + tm.tm_isdst = -1; + tm.tm_year = ((dos_date >> 9) & 127) + 1980 - 1900; + tm.tm_mon = ((dos_date >> 5) & 15) - 1; + tm.tm_mday = dos_date & 31; + tm.tm_hour = (dos_time >> 11) & 31; + tm.tm_min = (dos_time >> 5) & 63; + tm.tm_sec = (dos_time << 1) & 62; + return mktime(&tm); +} + +#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS +static void mz_zip_time_t_to_dos_time(MZ_TIME_T time, mz_uint16 *pDOS_time, mz_uint16 *pDOS_date) +{ +#ifdef _MSC_VER + struct tm tm_struct; + struct tm *tm = &tm_struct; + errno_t err = localtime_s(tm, &time); + if (err) + { + *pDOS_date = 0; + *pDOS_time = 0; + return; + } +#else + struct tm *tm = localtime(&time); +#endif /* #ifdef _MSC_VER */ + + *pDOS_time = (mz_uint16)(((tm->tm_hour) << 11) + ((tm->tm_min) << 5) + ((tm->tm_sec) >> 1)); + *pDOS_date = (mz_uint16)(((tm->tm_year + 1900 - 1980) << 9) + ((tm->tm_mon + 1) << 5) + tm->tm_mday); +} +#endif /* MINIZ_NO_ARCHIVE_WRITING_APIS */ + +#ifndef MINIZ_NO_STDIO +#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS +static mz_bool mz_zip_get_file_modified_time(const char *pFilename, MZ_TIME_T *pTime) +{ + struct MZ_FILE_STAT_STRUCT file_stat; + + /* On Linux with x86 glibc, this call will fail on large files (I think >= 0x80000000 bytes) unless you compiled with _LARGEFILE64_SOURCE. Argh. */ + if (MZ_FILE_STAT(pFilename, &file_stat) != 0) + return MZ_FALSE; + + *pTime = file_stat.st_mtime; + + return MZ_TRUE; +} +#endif /* #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS*/ + +static mz_bool mz_zip_set_file_times(const char *pFilename, MZ_TIME_T access_time, MZ_TIME_T modified_time) +{ + struct utimbuf t; + + memset(&t, 0, sizeof(t)); + t.actime = access_time; + t.modtime = modified_time; + + return !utime(pFilename, &t); +} +#endif /* #ifndef MINIZ_NO_STDIO */ +#endif /* #ifndef MINIZ_NO_TIME */ + +static MZ_FORCEINLINE mz_bool mz_zip_set_error(mz_zip_archive *pZip, mz_zip_error err_num) +{ + if (pZip) + pZip->m_last_error = err_num; + return MZ_FALSE; +} + +static mz_bool mz_zip_reader_init_internal(mz_zip_archive *pZip, mz_uint flags) +{ + (void)flags; + if ((!pZip) || (pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_INVALID)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!pZip->m_pAlloc) + pZip->m_pAlloc = miniz_def_alloc_func; + if (!pZip->m_pFree) + pZip->m_pFree = miniz_def_free_func; + if (!pZip->m_pRealloc) + pZip->m_pRealloc = miniz_def_realloc_func; + + pZip->m_archive_size = 0; + pZip->m_central_directory_file_ofs = 0; + pZip->m_total_files = 0; + pZip->m_last_error = MZ_ZIP_NO_ERROR; + + if (NULL == (pZip->m_pState = (mz_zip_internal_state *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_internal_state)))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + memset(pZip->m_pState, 0, sizeof(mz_zip_internal_state)); + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir, sizeof(mz_uint8)); + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir_offsets, sizeof(mz_uint32)); + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_sorted_central_dir_offsets, sizeof(mz_uint32)); + pZip->m_pState->m_init_flags = flags; + pZip->m_pState->m_zip64 = MZ_FALSE; + pZip->m_pState->m_zip64_has_extended_info_fields = MZ_FALSE; + + pZip->m_zip_mode = MZ_ZIP_MODE_READING; + + return MZ_TRUE; +} + +static MZ_FORCEINLINE mz_bool mz_zip_reader_filename_less(const mz_zip_array *pCentral_dir_array, const mz_zip_array *pCentral_dir_offsets, mz_uint l_index, mz_uint r_index) +{ + const mz_uint8 *pL = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, l_index)), *pE; + const mz_uint8 *pR = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, r_index)); + mz_uint l_len = MZ_READ_LE16(pL + MZ_ZIP_CDH_FILENAME_LEN_OFS), r_len = MZ_READ_LE16(pR + MZ_ZIP_CDH_FILENAME_LEN_OFS); + mz_uint8 l = 0, r = 0; + pL += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE; + pR += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE; + pE = pL + MZ_MIN(l_len, r_len); + while (pL < pE) + { + if ((l = MZ_TOLOWER(*pL)) != (r = MZ_TOLOWER(*pR))) + break; + pL++; + pR++; + } + return (pL == pE) ? (l_len < r_len) : (l < r); +} + +#define MZ_SWAP_UINT32(a, b) \ + do \ + { \ + mz_uint32 t = a; \ + a = b; \ + b = t; \ + } \ + MZ_MACRO_END + +/* Heap sort of lowercased filenames, used to help accelerate plain central directory searches by mz_zip_reader_locate_file(). (Could also use qsort(), but it could allocate memory.) */ +static void mz_zip_reader_sort_central_dir_offsets_by_filename(mz_zip_archive *pZip) +{ + mz_zip_internal_state *pState = pZip->m_pState; + const mz_zip_array *pCentral_dir_offsets = &pState->m_central_dir_offsets; + const mz_zip_array *pCentral_dir = &pState->m_central_dir; + mz_uint32 *pIndices; + mz_uint32 start, end; + const mz_uint32 size = pZip->m_total_files; + + if (size <= 1U) + return; + + pIndices = &MZ_ZIP_ARRAY_ELEMENT(&pState->m_sorted_central_dir_offsets, mz_uint32, 0); + + start = (size - 2U) >> 1U; + for (;;) + { + mz_uint64 child, root = start; + for (;;) + { + if ((child = (root << 1U) + 1U) >= size) + break; + child += (((child + 1U) < size) && (mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[child], pIndices[child + 1U]))); + if (!mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[root], pIndices[child])) + break; + MZ_SWAP_UINT32(pIndices[root], pIndices[child]); + root = child; + } + if (!start) + break; + start--; + } + + end = size - 1; + while (end > 0) + { + mz_uint64 child, root = 0; + MZ_SWAP_UINT32(pIndices[end], pIndices[0]); + for (;;) + { + if ((child = (root << 1U) + 1U) >= end) + break; + child += (((child + 1U) < end) && mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[child], pIndices[child + 1U])); + if (!mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[root], pIndices[child])) + break; + MZ_SWAP_UINT32(pIndices[root], pIndices[child]); + root = child; + } + end--; + } +} + +static mz_bool mz_zip_reader_locate_header_sig(mz_zip_archive *pZip, mz_uint32 record_sig, mz_uint32 record_size, mz_int64 *pOfs) +{ + mz_int64 cur_file_ofs; + mz_uint32 buf_u32[4096 / sizeof(mz_uint32)]; + mz_uint8 *pBuf = (mz_uint8 *)buf_u32; + + /* Basic sanity checks - reject files which are too small */ + if (pZip->m_archive_size < record_size) + return MZ_FALSE; + + /* Find the record by scanning the file from the end towards the beginning. */ + cur_file_ofs = MZ_MAX((mz_int64)pZip->m_archive_size - (mz_int64)sizeof(buf_u32), 0); + for (;;) + { + int i, n = (int)MZ_MIN(sizeof(buf_u32), pZip->m_archive_size - cur_file_ofs); + + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, n) != (mz_uint)n) + return MZ_FALSE; + + for (i = n - 4; i >= 0; --i) + { + mz_uint s = MZ_READ_LE32(pBuf + i); + if (s == record_sig) + { + if ((pZip->m_archive_size - (cur_file_ofs + i)) >= record_size) + break; + } + } + + if (i >= 0) + { + cur_file_ofs += i; + break; + } + + /* Give up if we've searched the entire file, or we've gone back "too far" (~64kb) */ + if ((!cur_file_ofs) || ((pZip->m_archive_size - cur_file_ofs) >= (MZ_UINT16_MAX + record_size))) + return MZ_FALSE; + + cur_file_ofs = MZ_MAX(cur_file_ofs - (sizeof(buf_u32) - 3), 0); + } + + *pOfs = cur_file_ofs; + return MZ_TRUE; +} + +static mz_bool mz_zip_reader_read_central_dir(mz_zip_archive *pZip, mz_uint flags) +{ + mz_uint cdir_size = 0, cdir_entries_on_this_disk = 0, num_this_disk = 0, cdir_disk_index = 0; + mz_uint64 cdir_ofs = 0; + mz_int64 cur_file_ofs = 0; + const mz_uint8 *p; + + mz_uint32 buf_u32[4096 / sizeof(mz_uint32)]; + mz_uint8 *pBuf = (mz_uint8 *)buf_u32; + mz_bool sort_central_dir = ((flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0); + mz_uint32 zip64_end_of_central_dir_locator_u32[(MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pZip64_locator = (mz_uint8 *)zip64_end_of_central_dir_locator_u32; + + mz_uint32 zip64_end_of_central_dir_header_u32[(MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pZip64_end_of_central_dir = (mz_uint8 *)zip64_end_of_central_dir_header_u32; + + mz_uint64 zip64_end_of_central_dir_ofs = 0; + + /* Basic sanity checks - reject files which are too small, and check the first 4 bytes of the file to make sure a local header is there. */ + if (pZip->m_archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + + if (!mz_zip_reader_locate_header_sig(pZip, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE, &cur_file_ofs)) + return mz_zip_set_error(pZip, MZ_ZIP_FAILED_FINDING_CENTRAL_DIR); + + /* Read and verify the end of central directory record. */ + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + if (MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_SIG_OFS) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + + if (cur_file_ofs >= (MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE + MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE)) + { + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs - MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE, pZip64_locator, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) == MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) + { + if (MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_SIG_OFS) == MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG) + { + zip64_end_of_central_dir_ofs = MZ_READ_LE64(pZip64_locator + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS); + if (zip64_end_of_central_dir_ofs > (pZip->m_archive_size - MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE)) + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + + if (pZip->m_pRead(pZip->m_pIO_opaque, zip64_end_of_central_dir_ofs, pZip64_end_of_central_dir, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) == MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) + { + if (MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIG_OFS) == MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG) + { + pZip->m_pState->m_zip64 = MZ_TRUE; + } + } + } + } + } + + pZip->m_total_files = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS); + cdir_entries_on_this_disk = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS); + num_this_disk = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_THIS_DISK_OFS); + cdir_disk_index = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_DISK_CDIR_OFS); + cdir_size = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_SIZE_OFS); + cdir_ofs = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_OFS_OFS); + + if (pZip->m_pState->m_zip64) + { + mz_uint32 zip64_total_num_of_disks = MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS); + mz_uint64 zip64_cdir_total_entries = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS); + mz_uint64 zip64_cdir_total_entries_on_this_disk = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS); + mz_uint64 zip64_size_of_end_of_central_dir_record = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS); + mz_uint64 zip64_size_of_central_directory = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_SIZE_OFS); + + if (zip64_size_of_end_of_central_dir_record < (MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE - 12)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if (zip64_total_num_of_disks != 1U) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK); + + /* Check for miniz's practical limits */ + if (zip64_cdir_total_entries > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + + pZip->m_total_files = (mz_uint32)zip64_cdir_total_entries; + + if (zip64_cdir_total_entries_on_this_disk > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + + cdir_entries_on_this_disk = (mz_uint32)zip64_cdir_total_entries_on_this_disk; + + /* Check for miniz's current practical limits (sorry, this should be enough for millions of files) */ + if (zip64_size_of_central_directory > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + + cdir_size = (mz_uint32)zip64_size_of_central_directory; + + num_this_disk = MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS); + + cdir_disk_index = MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS); + + cdir_ofs = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_OFS_OFS); + } + + if (pZip->m_total_files != cdir_entries_on_this_disk) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK); + + if (((num_this_disk | cdir_disk_index) != 0) && ((num_this_disk != 1) || (cdir_disk_index != 1))) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK); + + if (cdir_size < pZip->m_total_files * MZ_ZIP_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if ((cdir_ofs + (mz_uint64)cdir_size) > pZip->m_archive_size) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + pZip->m_central_directory_file_ofs = cdir_ofs; + + if (pZip->m_total_files) + { + mz_uint i, n; + /* Read the entire central directory into a heap block, and allocate another heap block to hold the unsorted central dir file record offsets, and possibly another to hold the sorted indices. */ + if ((!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir, cdir_size, MZ_FALSE)) || + (!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir_offsets, pZip->m_total_files, MZ_FALSE))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + if (sort_central_dir) + { + if (!mz_zip_array_resize(pZip, &pZip->m_pState->m_sorted_central_dir_offsets, pZip->m_total_files, MZ_FALSE)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (pZip->m_pRead(pZip->m_pIO_opaque, cdir_ofs, pZip->m_pState->m_central_dir.m_p, cdir_size) != cdir_size) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + /* Now create an index into the central directory file records, do some basic sanity checking on each record */ + p = (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p; + for (n = cdir_size, i = 0; i < pZip->m_total_files; ++i) + { + mz_uint total_header_size, disk_index, bit_flags, filename_size, ext_data_size; + mz_uint64 comp_size, decomp_size, local_header_ofs; + + if ((n < MZ_ZIP_CENTRAL_DIR_HEADER_SIZE) || (MZ_READ_LE32(p) != MZ_ZIP_CENTRAL_DIR_HEADER_SIG)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, i) = (mz_uint32)(p - (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p); + + if (sort_central_dir) + MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_sorted_central_dir_offsets, mz_uint32, i) = i; + + comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS); + decomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS); + local_header_ofs = MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS); + filename_size = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS); + ext_data_size = MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS); + + if ((!pZip->m_pState->m_zip64_has_extended_info_fields) && + (ext_data_size) && + (MZ_MAX(MZ_MAX(comp_size, decomp_size), local_header_ofs) == MZ_UINT32_MAX)) + { + /* Attempt to find zip64 extended information field in the entry's extra data */ + mz_uint32 extra_size_remaining = ext_data_size; + + if (extra_size_remaining) + { + const mz_uint8 *pExtra_data; + void* buf = NULL; + + if (MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size + ext_data_size > n) + { + buf = MZ_MALLOC(ext_data_size); + if(buf==NULL) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + if (pZip->m_pRead(pZip->m_pIO_opaque, cdir_ofs + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size, buf, ext_data_size) != ext_data_size) + { + MZ_FREE(buf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + + pExtra_data = (mz_uint8*)buf; + } + else + { + pExtra_data = p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size; + } + + do + { + mz_uint32 field_id; + mz_uint32 field_data_size; + + if (extra_size_remaining < (sizeof(mz_uint16) * 2)) + { + MZ_FREE(buf); + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + field_id = MZ_READ_LE16(pExtra_data); + field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16)); + + if ((field_data_size + sizeof(mz_uint16) * 2) > extra_size_remaining) + { + MZ_FREE(buf); + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) + { + /* Ok, the archive didn't have any zip64 headers but it uses a zip64 extended information field so mark it as zip64 anyway (this can occur with infozip's zip util when it reads compresses files from stdin). */ + pZip->m_pState->m_zip64 = MZ_TRUE; + pZip->m_pState->m_zip64_has_extended_info_fields = MZ_TRUE; + break; + } + + pExtra_data += sizeof(mz_uint16) * 2 + field_data_size; + extra_size_remaining = extra_size_remaining - sizeof(mz_uint16) * 2 - field_data_size; + } while (extra_size_remaining); + + MZ_FREE(buf); + } + } + + /* I've seen archives that aren't marked as zip64 that uses zip64 ext data, argh */ + if ((comp_size != MZ_UINT32_MAX) && (decomp_size != MZ_UINT32_MAX)) + { + if (((!MZ_READ_LE32(p + MZ_ZIP_CDH_METHOD_OFS)) && (decomp_size != comp_size)) || (decomp_size && !comp_size)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + disk_index = MZ_READ_LE16(p + MZ_ZIP_CDH_DISK_START_OFS); + if ((disk_index == MZ_UINT16_MAX) || ((disk_index != num_this_disk) && (disk_index != 1))) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK); + + if (comp_size != MZ_UINT32_MAX) + { + if (((mz_uint64)MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS) + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + comp_size) > pZip->m_archive_size) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + bit_flags = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS); + if (bit_flags & MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + + if ((total_header_size = MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS)) > n) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + n -= total_header_size; + p += total_header_size; + } + } + + if (sort_central_dir) + mz_zip_reader_sort_central_dir_offsets_by_filename(pZip); + + return MZ_TRUE; +} + +void mz_zip_zero_struct(mz_zip_archive *pZip) +{ + if (pZip) + MZ_CLEAR_OBJ(*pZip); +} + +static mz_bool mz_zip_reader_end_internal(mz_zip_archive *pZip, mz_bool set_last_error) +{ + mz_bool status = MZ_TRUE; + + if (!pZip) + return MZ_FALSE; + + if ((!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (pZip->m_zip_mode != MZ_ZIP_MODE_READING)) + { + if (set_last_error) + pZip->m_last_error = MZ_ZIP_INVALID_PARAMETER; + + return MZ_FALSE; + } + + if (pZip->m_pState) + { + mz_zip_internal_state *pState = pZip->m_pState; + pZip->m_pState = NULL; + + mz_zip_array_clear(pZip, &pState->m_central_dir); + mz_zip_array_clear(pZip, &pState->m_central_dir_offsets); + mz_zip_array_clear(pZip, &pState->m_sorted_central_dir_offsets); + +#ifndef MINIZ_NO_STDIO + if (pState->m_pFile) + { + if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE) + { + if (MZ_FCLOSE(pState->m_pFile) == EOF) + { + if (set_last_error) + pZip->m_last_error = MZ_ZIP_FILE_CLOSE_FAILED; + status = MZ_FALSE; + } + } + pState->m_pFile = NULL; + } +#endif /* #ifndef MINIZ_NO_STDIO */ + + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + } + pZip->m_zip_mode = MZ_ZIP_MODE_INVALID; + + return status; +} + +mz_bool mz_zip_reader_end(mz_zip_archive *pZip) +{ + return mz_zip_reader_end_internal(pZip, MZ_TRUE); +} +mz_bool mz_zip_reader_init(mz_zip_archive *pZip, mz_uint64 size, mz_uint flags) +{ + if ((!pZip) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_reader_init_internal(pZip, flags)) + return MZ_FALSE; + + pZip->m_zip_type = MZ_ZIP_TYPE_USER; + pZip->m_archive_size = size; + + if (!mz_zip_reader_read_central_dir(pZip, flags)) + { + mz_zip_reader_end_internal(pZip, MZ_FALSE); + return MZ_FALSE; + } + + return MZ_TRUE; +} + +static size_t mz_zip_mem_read_func(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n) +{ + mz_zip_archive *pZip = (mz_zip_archive *)pOpaque; + size_t s = (file_ofs >= pZip->m_archive_size) ? 0 : (size_t)MZ_MIN(pZip->m_archive_size - file_ofs, n); + memcpy(pBuf, (const mz_uint8 *)pZip->m_pState->m_pMem + file_ofs, s); + return s; +} + +mz_bool mz_zip_reader_init_mem(mz_zip_archive *pZip, const void *pMem, size_t size, mz_uint flags) +{ + if (!pMem) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + + if (!mz_zip_reader_init_internal(pZip, flags)) + return MZ_FALSE; + + pZip->m_zip_type = MZ_ZIP_TYPE_MEMORY; + pZip->m_archive_size = size; + pZip->m_pRead = mz_zip_mem_read_func; + pZip->m_pIO_opaque = pZip; + pZip->m_pNeeds_keepalive = NULL; + +#ifdef __cplusplus + pZip->m_pState->m_pMem = const_cast(pMem); +#else + pZip->m_pState->m_pMem = (void *)pMem; +#endif + + pZip->m_pState->m_mem_size = size; + + if (!mz_zip_reader_read_central_dir(pZip, flags)) + { + mz_zip_reader_end_internal(pZip, MZ_FALSE); + return MZ_FALSE; + } + + return MZ_TRUE; +} + +#ifndef MINIZ_NO_STDIO +static size_t mz_zip_file_read_func(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n) +{ + mz_zip_archive *pZip = (mz_zip_archive *)pOpaque; + mz_int64 cur_ofs = MZ_FTELL64(pZip->m_pState->m_pFile); + + file_ofs += pZip->m_pState->m_file_archive_start_ofs; + + if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pZip->m_pState->m_pFile, (mz_int64)file_ofs, SEEK_SET)))) + return 0; + + return MZ_FREAD(pBuf, 1, n, pZip->m_pState->m_pFile); +} + +mz_bool mz_zip_reader_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint32 flags) +{ + return mz_zip_reader_init_file_v2(pZip, pFilename, flags, 0, 0); +} + +mz_bool mz_zip_reader_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags, mz_uint64 file_start_ofs, mz_uint64 archive_size) +{ + mz_uint64 file_size; + MZ_FILE *pFile; + + if ((!pZip) || (!pFilename) || ((archive_size) && (archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE))) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pFile = MZ_FOPEN(pFilename, "rb"); + if (!pFile) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + + file_size = archive_size; + if (!file_size) + { + if (MZ_FSEEK64(pFile, 0, SEEK_END)) + { + MZ_FCLOSE(pFile); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED); + } + + file_size = MZ_FTELL64(pFile); + } + + /* TODO: Better sanity check archive_size and the # of actual remaining bytes */ + + if (file_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + { + MZ_FCLOSE(pFile); + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + } + + if (!mz_zip_reader_init_internal(pZip, flags)) + { + MZ_FCLOSE(pFile); + return MZ_FALSE; + } + + pZip->m_zip_type = MZ_ZIP_TYPE_FILE; + pZip->m_pRead = mz_zip_file_read_func; + pZip->m_pIO_opaque = pZip; + pZip->m_pState->m_pFile = pFile; + pZip->m_archive_size = file_size; + pZip->m_pState->m_file_archive_start_ofs = file_start_ofs; + + if (!mz_zip_reader_read_central_dir(pZip, flags)) + { + mz_zip_reader_end_internal(pZip, MZ_FALSE); + return MZ_FALSE; + } + + return MZ_TRUE; +} + +mz_bool mz_zip_reader_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint64 archive_size, mz_uint flags) +{ + mz_uint64 cur_file_ofs; + + if ((!pZip) || (!pFile)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + + cur_file_ofs = MZ_FTELL64(pFile); + + if (!archive_size) + { + if (MZ_FSEEK64(pFile, 0, SEEK_END)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED); + + archive_size = MZ_FTELL64(pFile) - cur_file_ofs; + + if (archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE); + } + + if (!mz_zip_reader_init_internal(pZip, flags)) + return MZ_FALSE; + + pZip->m_zip_type = MZ_ZIP_TYPE_CFILE; + pZip->m_pRead = mz_zip_file_read_func; + + pZip->m_pIO_opaque = pZip; + pZip->m_pState->m_pFile = pFile; + pZip->m_archive_size = archive_size; + pZip->m_pState->m_file_archive_start_ofs = cur_file_ofs; + + if (!mz_zip_reader_read_central_dir(pZip, flags)) + { + mz_zip_reader_end_internal(pZip, MZ_FALSE); + return MZ_FALSE; + } + + return MZ_TRUE; +} + +#endif /* #ifndef MINIZ_NO_STDIO */ + +static MZ_FORCEINLINE const mz_uint8 *mz_zip_get_cdh(mz_zip_archive *pZip, mz_uint file_index) +{ + if ((!pZip) || (!pZip->m_pState) || (file_index >= pZip->m_total_files)) + return NULL; + return &MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index)); +} + +mz_bool mz_zip_reader_is_file_encrypted(mz_zip_archive *pZip, mz_uint file_index) +{ + mz_uint m_bit_flag; + const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index); + if (!p) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return MZ_FALSE; + } + + m_bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS); + return (m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION)) != 0; +} + +mz_bool mz_zip_reader_is_file_supported(mz_zip_archive *pZip, mz_uint file_index) +{ + mz_uint bit_flag; + mz_uint method; + + const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index); + if (!p) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return MZ_FALSE; + } + + method = MZ_READ_LE16(p + MZ_ZIP_CDH_METHOD_OFS); + bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS); + + if ((method != 0) && (method != MZ_DEFLATED)) + { + mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD); + return MZ_FALSE; + } + + if (bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION)) + { + mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + return MZ_FALSE; + } + + if (bit_flag & MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG) + { + mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE); + return MZ_FALSE; + } + + return MZ_TRUE; +} + +mz_bool mz_zip_reader_is_file_a_directory(mz_zip_archive *pZip, mz_uint file_index) +{ + mz_uint filename_len, attribute_mapping_id, external_attr; + const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index); + if (!p) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return MZ_FALSE; + } + + filename_len = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS); + if (filename_len) + { + if (*(p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_len - 1) == '/') + return MZ_TRUE; + } + + /* Bugfix: This code was also checking if the internal attribute was non-zero, which wasn't correct. */ + /* Most/all zip writers (hopefully) set DOS file/directory attributes in the low 16-bits, so check for the DOS directory flag and ignore the source OS ID in the created by field. */ + /* FIXME: Remove this check? Is it necessary - we already check the filename. */ + attribute_mapping_id = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_MADE_BY_OFS) >> 8; + (void)attribute_mapping_id; + + external_attr = MZ_READ_LE32(p + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS); + if ((external_attr & MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG) != 0) + { + return MZ_TRUE; + } + + return MZ_FALSE; +} + +static mz_bool mz_zip_file_stat_internal(mz_zip_archive *pZip, mz_uint file_index, const mz_uint8 *pCentral_dir_header, mz_zip_archive_file_stat *pStat, mz_bool *pFound_zip64_extra_data) +{ + mz_uint n; + const mz_uint8 *p = pCentral_dir_header; + + if (pFound_zip64_extra_data) + *pFound_zip64_extra_data = MZ_FALSE; + + if ((!p) || (!pStat)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + /* Extract fields from the central directory record. */ + pStat->m_file_index = file_index; + pStat->m_central_dir_ofs = MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index); + pStat->m_version_made_by = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_MADE_BY_OFS); + pStat->m_version_needed = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_NEEDED_OFS); + pStat->m_bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS); + pStat->m_method = MZ_READ_LE16(p + MZ_ZIP_CDH_METHOD_OFS); +#ifndef MINIZ_NO_TIME + pStat->m_time = mz_zip_dos_to_time_t(MZ_READ_LE16(p + MZ_ZIP_CDH_FILE_TIME_OFS), MZ_READ_LE16(p + MZ_ZIP_CDH_FILE_DATE_OFS)); +#endif + pStat->m_crc32 = MZ_READ_LE32(p + MZ_ZIP_CDH_CRC32_OFS); + pStat->m_comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS); + pStat->m_uncomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS); + pStat->m_internal_attr = MZ_READ_LE16(p + MZ_ZIP_CDH_INTERNAL_ATTR_OFS); + pStat->m_external_attr = MZ_READ_LE32(p + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS); + pStat->m_local_header_ofs = MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS); + + /* Copy as much of the filename and comment as possible. */ + n = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS); + n = MZ_MIN(n, MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE - 1); + memcpy(pStat->m_filename, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, n); + pStat->m_filename[n] = '\0'; + + n = MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS); + n = MZ_MIN(n, MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE - 1); + pStat->m_comment_size = n; + memcpy(pStat->m_comment, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS), n); + pStat->m_comment[n] = '\0'; + + /* Set some flags for convienance */ + pStat->m_is_directory = mz_zip_reader_is_file_a_directory(pZip, file_index); + pStat->m_is_encrypted = mz_zip_reader_is_file_encrypted(pZip, file_index); + pStat->m_is_supported = mz_zip_reader_is_file_supported(pZip, file_index); + + /* See if we need to read any zip64 extended information fields. */ + /* Confusingly, these zip64 fields can be present even on non-zip64 archives (Debian zip on a huge files from stdin piped to stdout creates them). */ + if (MZ_MAX(MZ_MAX(pStat->m_comp_size, pStat->m_uncomp_size), pStat->m_local_header_ofs) == MZ_UINT32_MAX) + { + /* Attempt to find zip64 extended information field in the entry's extra data */ + mz_uint32 extra_size_remaining = MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS); + + if (extra_size_remaining) + { + const mz_uint8 *pExtra_data = p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS); + + do + { + mz_uint32 field_id; + mz_uint32 field_data_size; + + if (extra_size_remaining < (sizeof(mz_uint16) * 2)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + field_id = MZ_READ_LE16(pExtra_data); + field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16)); + + if ((field_data_size + sizeof(mz_uint16) * 2) > extra_size_remaining) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) + { + const mz_uint8 *pField_data = pExtra_data + sizeof(mz_uint16) * 2; + mz_uint32 field_data_remaining = field_data_size; + + if (pFound_zip64_extra_data) + *pFound_zip64_extra_data = MZ_TRUE; + + if (pStat->m_uncomp_size == MZ_UINT32_MAX) + { + if (field_data_remaining < sizeof(mz_uint64)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + pStat->m_uncomp_size = MZ_READ_LE64(pField_data); + pField_data += sizeof(mz_uint64); + field_data_remaining -= sizeof(mz_uint64); + } + + if (pStat->m_comp_size == MZ_UINT32_MAX) + { + if (field_data_remaining < sizeof(mz_uint64)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + pStat->m_comp_size = MZ_READ_LE64(pField_data); + pField_data += sizeof(mz_uint64); + field_data_remaining -= sizeof(mz_uint64); + } + + if (pStat->m_local_header_ofs == MZ_UINT32_MAX) + { + if (field_data_remaining < sizeof(mz_uint64)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + pStat->m_local_header_ofs = MZ_READ_LE64(pField_data); + pField_data += sizeof(mz_uint64); + field_data_remaining -= sizeof(mz_uint64); + } + + break; + } + + pExtra_data += sizeof(mz_uint16) * 2 + field_data_size; + extra_size_remaining = extra_size_remaining - sizeof(mz_uint16) * 2 - field_data_size; + } while (extra_size_remaining); + } + } + + return MZ_TRUE; +} + +static MZ_FORCEINLINE mz_bool mz_zip_string_equal(const char *pA, const char *pB, mz_uint len, mz_uint flags) +{ + mz_uint i; + if (flags & MZ_ZIP_FLAG_CASE_SENSITIVE) + return 0 == memcmp(pA, pB, len); + for (i = 0; i < len; ++i) + if (MZ_TOLOWER(pA[i]) != MZ_TOLOWER(pB[i])) + return MZ_FALSE; + return MZ_TRUE; +} + +static MZ_FORCEINLINE int mz_zip_filename_compare(const mz_zip_array *pCentral_dir_array, const mz_zip_array *pCentral_dir_offsets, mz_uint l_index, const char *pR, mz_uint r_len) +{ + const mz_uint8 *pL = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, l_index)), *pE; + mz_uint l_len = MZ_READ_LE16(pL + MZ_ZIP_CDH_FILENAME_LEN_OFS); + mz_uint8 l = 0, r = 0; + pL += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE; + pE = pL + MZ_MIN(l_len, r_len); + while (pL < pE) + { + if ((l = MZ_TOLOWER(*pL)) != (r = MZ_TOLOWER(*pR))) + break; + pL++; + pR++; + } + return (pL == pE) ? (int)(l_len - r_len) : (l - r); +} + +static mz_bool mz_zip_locate_file_binary_search(mz_zip_archive *pZip, const char *pFilename, mz_uint32 *pIndex) +{ + mz_zip_internal_state *pState = pZip->m_pState; + const mz_zip_array *pCentral_dir_offsets = &pState->m_central_dir_offsets; + const mz_zip_array *pCentral_dir = &pState->m_central_dir; + mz_uint32 *pIndices = &MZ_ZIP_ARRAY_ELEMENT(&pState->m_sorted_central_dir_offsets, mz_uint32, 0); + const uint32_t size = pZip->m_total_files; + const mz_uint filename_len = (mz_uint)strlen(pFilename); + + if (pIndex) + *pIndex = 0; + + if (size) + { + /* yes I could use uint32_t's, but then we would have to add some special case checks in the loop, argh, and */ + /* honestly the major expense here on 32-bit CPU's will still be the filename compare */ + mz_int64 l = 0, h = (mz_int64)size - 1; + + while (l <= h) + { + mz_int64 m = l + ((h - l) >> 1); + uint32_t file_index = pIndices[(uint32_t)m]; + + int comp = mz_zip_filename_compare(pCentral_dir, pCentral_dir_offsets, file_index, pFilename, filename_len); + if (!comp) + { + if (pIndex) + *pIndex = file_index; + return MZ_TRUE; + } + else if (comp < 0) + l = m + 1; + else + h = m - 1; + } + } + + return mz_zip_set_error(pZip, MZ_ZIP_FILE_NOT_FOUND); +} + +int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags) +{ + mz_uint32 index; + if (!mz_zip_reader_locate_file_v2(pZip, pName, pComment, flags, &index)) + return -1; + else + return (int)index; +} + +mz_bool mz_zip_reader_locate_file_v2(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags, mz_uint32 *pIndex) +{ + mz_uint file_index; + size_t name_len, comment_len; + + if (pIndex) + *pIndex = 0; + + if ((!pZip) || (!pZip->m_pState) || (!pName)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + /* See if we can use a binary search */ + if (((pZip->m_pState->m_init_flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0) && + (pZip->m_zip_mode == MZ_ZIP_MODE_READING) && + ((flags & (MZ_ZIP_FLAG_IGNORE_PATH | MZ_ZIP_FLAG_CASE_SENSITIVE)) == 0) && (!pComment) && (pZip->m_pState->m_sorted_central_dir_offsets.m_size)) + { + return mz_zip_locate_file_binary_search(pZip, pName, pIndex); + } + + /* Locate the entry by scanning the entire central directory */ + name_len = strlen(pName); + if (name_len > MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + comment_len = pComment ? strlen(pComment) : 0; + if (comment_len > MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + for (file_index = 0; file_index < pZip->m_total_files; file_index++) + { + const mz_uint8 *pHeader = &MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index)); + mz_uint filename_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_FILENAME_LEN_OFS); + const char *pFilename = (const char *)pHeader + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE; + if (filename_len < name_len) + continue; + if (comment_len) + { + mz_uint file_extra_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_EXTRA_LEN_OFS), file_comment_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_COMMENT_LEN_OFS); + const char *pFile_comment = pFilename + filename_len + file_extra_len; + if ((file_comment_len != comment_len) || (!mz_zip_string_equal(pComment, pFile_comment, file_comment_len, flags))) + continue; + } + if ((flags & MZ_ZIP_FLAG_IGNORE_PATH) && (filename_len)) + { + int ofs = filename_len - 1; + do + { + if ((pFilename[ofs] == '/') || (pFilename[ofs] == '\\') || (pFilename[ofs] == ':')) + break; + } while (--ofs >= 0); + ofs++; + pFilename += ofs; + filename_len -= ofs; + } + if ((filename_len == name_len) && (mz_zip_string_equal(pName, pFilename, filename_len, flags))) + { + if (pIndex) + *pIndex = file_index; + return MZ_TRUE; + } + } + + return mz_zip_set_error(pZip, MZ_ZIP_FILE_NOT_FOUND); +} + +mz_bool mz_zip_reader_extract_to_mem_no_alloc(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size) +{ + int status = TINFL_STATUS_DONE; + mz_uint64 needed_size, cur_file_ofs, comp_remaining, out_buf_ofs = 0, read_buf_size, read_buf_ofs = 0, read_buf_avail; + mz_zip_archive_file_stat file_stat; + void *pRead_buf; + mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32; + tinfl_decompressor inflator; + + if ((!pZip) || (!pZip->m_pState) || ((buf_size) && (!pBuf)) || ((user_read_buf_size) && (!pUser_read_buf)) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat)) + return MZ_FALSE; + + /* A directory or zero length file */ + if ((file_stat.m_is_directory) || (!file_stat.m_comp_size)) + return MZ_TRUE; + + /* Encryption and patch files are not supported. */ + if (file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + + /* This function only supports decompressing stored and deflate. */ + if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD); + + /* Ensure supplied output buffer is large enough. */ + needed_size = (flags & MZ_ZIP_FLAG_COMPRESSED_DATA) ? file_stat.m_comp_size : file_stat.m_uncomp_size; + if (buf_size < needed_size) + return mz_zip_set_error(pZip, MZ_ZIP_BUF_TOO_SMALL); + + /* Read and parse the local directory entry. */ + cur_file_ofs = file_stat.m_local_header_ofs; + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS); + if ((cur_file_ofs + file_stat.m_comp_size) > pZip->m_archive_size) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!file_stat.m_method)) + { + /* The file is stored or the caller has requested the compressed data. */ + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, (size_t)needed_size) != needed_size) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) == 0) + { + if (mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, (size_t)file_stat.m_uncomp_size) != file_stat.m_crc32) + return mz_zip_set_error(pZip, MZ_ZIP_CRC_CHECK_FAILED); + } +#endif + + return MZ_TRUE; + } + + /* Decompress the file either directly from memory or from a file input buffer. */ + tinfl_init(&inflator); + + if (pZip->m_pState->m_pMem) + { + /* Read directly from the archive in memory. */ + pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + cur_file_ofs; + read_buf_size = read_buf_avail = file_stat.m_comp_size; + comp_remaining = 0; + } + else if (pUser_read_buf) + { + /* Use a user provided read buffer. */ + if (!user_read_buf_size) + return MZ_FALSE; + pRead_buf = (mz_uint8 *)pUser_read_buf; + read_buf_size = user_read_buf_size; + read_buf_avail = 0; + comp_remaining = file_stat.m_comp_size; + } + else + { + /* Temporarily allocate a read buffer. */ + read_buf_size = MZ_MIN(file_stat.m_comp_size, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE); + if (((sizeof(size_t) == sizeof(mz_uint32))) && (read_buf_size > 0x7FFFFFFF)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (NULL == (pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)read_buf_size))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + read_buf_avail = 0; + comp_remaining = file_stat.m_comp_size; + } + + do + { + /* The size_t cast here should be OK because we've verified that the output buffer is >= file_stat.m_uncomp_size above */ + size_t in_buf_size, out_buf_size = (size_t)(file_stat.m_uncomp_size - out_buf_ofs); + if ((!read_buf_avail) && (!pZip->m_pState->m_pMem)) + { + read_buf_avail = MZ_MIN(read_buf_size, comp_remaining); + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail) + { + status = TINFL_STATUS_FAILED; + mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED); + break; + } + cur_file_ofs += read_buf_avail; + comp_remaining -= read_buf_avail; + read_buf_ofs = 0; + } + in_buf_size = (size_t)read_buf_avail; + status = tinfl_decompress(&inflator, (mz_uint8 *)pRead_buf + read_buf_ofs, &in_buf_size, (mz_uint8 *)pBuf, (mz_uint8 *)pBuf + out_buf_ofs, &out_buf_size, TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF | (comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0)); + read_buf_avail -= in_buf_size; + read_buf_ofs += in_buf_size; + out_buf_ofs += out_buf_size; + } while (status == TINFL_STATUS_NEEDS_MORE_INPUT); + + if (status == TINFL_STATUS_DONE) + { + /* Make sure the entire file was decompressed, and check its CRC. */ + if (out_buf_ofs != file_stat.m_uncomp_size) + { + mz_zip_set_error(pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE); + status = TINFL_STATUS_FAILED; + } +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + else if (mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, (size_t)file_stat.m_uncomp_size) != file_stat.m_crc32) + { + mz_zip_set_error(pZip, MZ_ZIP_CRC_CHECK_FAILED); + status = TINFL_STATUS_FAILED; + } +#endif + } + + if ((!pZip->m_pState->m_pMem) && (!pUser_read_buf)) + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + + return status == TINFL_STATUS_DONE; +} + +mz_bool mz_zip_reader_extract_file_to_mem_no_alloc(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size) +{ + mz_uint32 file_index; + if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index)) + return MZ_FALSE; + return mz_zip_reader_extract_to_mem_no_alloc(pZip, file_index, pBuf, buf_size, flags, pUser_read_buf, user_read_buf_size); +} + +mz_bool mz_zip_reader_extract_to_mem(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags) +{ + return mz_zip_reader_extract_to_mem_no_alloc(pZip, file_index, pBuf, buf_size, flags, NULL, 0); +} + +mz_bool mz_zip_reader_extract_file_to_mem(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags) +{ + return mz_zip_reader_extract_file_to_mem_no_alloc(pZip, pFilename, pBuf, buf_size, flags, NULL, 0); +} + +void *mz_zip_reader_extract_to_heap(mz_zip_archive *pZip, mz_uint file_index, size_t *pSize, mz_uint flags) +{ + mz_uint64 comp_size, uncomp_size, alloc_size; + const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index); + void *pBuf; + + if (pSize) + *pSize = 0; + + if (!p) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return NULL; + } + + comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS); + uncomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS); + + alloc_size = (flags & MZ_ZIP_FLAG_COMPRESSED_DATA) ? comp_size : uncomp_size; + if (((sizeof(size_t) == sizeof(mz_uint32))) && (alloc_size > 0x7FFFFFFF)) + { + mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + return NULL; + } + + if (NULL == (pBuf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)alloc_size))) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + return NULL; + } + + if (!mz_zip_reader_extract_to_mem(pZip, file_index, pBuf, (size_t)alloc_size, flags)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return NULL; + } + + if (pSize) + *pSize = (size_t)alloc_size; + return pBuf; +} + +void *mz_zip_reader_extract_file_to_heap(mz_zip_archive *pZip, const char *pFilename, size_t *pSize, mz_uint flags) +{ + mz_uint32 file_index; + if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index)) + { + if (pSize) + *pSize = 0; + return MZ_FALSE; + } + return mz_zip_reader_extract_to_heap(pZip, file_index, pSize, flags); +} + +mz_bool mz_zip_reader_extract_to_callback(mz_zip_archive *pZip, mz_uint file_index, mz_file_write_func pCallback, void *pOpaque, mz_uint flags) +{ + int status = TINFL_STATUS_DONE; + mz_uint file_crc32 = MZ_CRC32_INIT; + mz_uint64 read_buf_size, read_buf_ofs = 0, read_buf_avail, comp_remaining, out_buf_ofs = 0, cur_file_ofs; + mz_zip_archive_file_stat file_stat; + void *pRead_buf = NULL; + void *pWrite_buf = NULL; + mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32; + + if ((!pZip) || (!pZip->m_pState) || (!pCallback) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat)) + return MZ_FALSE; + + /* A directory or zero length file */ + if ((file_stat.m_is_directory) || (!file_stat.m_comp_size)) + return MZ_TRUE; + + /* Encryption and patch files are not supported. */ + if (file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + + /* This function only supports decompressing stored and deflate. */ + if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD); + + /* Read and do some minimal validation of the local directory entry (this doesn't crack the zip64 stuff, which we already have from the central dir) */ + cur_file_ofs = file_stat.m_local_header_ofs; + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS); + if ((cur_file_ofs + file_stat.m_comp_size) > pZip->m_archive_size) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + /* Decompress the file either directly from memory or from a file input buffer. */ + if (pZip->m_pState->m_pMem) + { + pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + cur_file_ofs; + read_buf_size = read_buf_avail = file_stat.m_comp_size; + comp_remaining = 0; + } + else + { + read_buf_size = MZ_MIN(file_stat.m_comp_size, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE); + if (NULL == (pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)read_buf_size))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + read_buf_avail = 0; + comp_remaining = file_stat.m_comp_size; + } + + if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!file_stat.m_method)) + { + /* The file is stored or the caller has requested the compressed data. */ + if (pZip->m_pState->m_pMem) + { + if (((sizeof(size_t) == sizeof(mz_uint32))) && (file_stat.m_comp_size > MZ_UINT32_MAX)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (pCallback(pOpaque, out_buf_ofs, pRead_buf, (size_t)file_stat.m_comp_size) != file_stat.m_comp_size) + { + mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED); + status = TINFL_STATUS_FAILED; + } + else if (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) + { +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + file_crc32 = (mz_uint32)mz_crc32(file_crc32, (const mz_uint8 *)pRead_buf, (size_t)file_stat.m_comp_size); +#endif + } + + cur_file_ofs += file_stat.m_comp_size; + out_buf_ofs += file_stat.m_comp_size; + comp_remaining = 0; + } + else + { + while (comp_remaining) + { + read_buf_avail = MZ_MIN(read_buf_size, comp_remaining); + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + status = TINFL_STATUS_FAILED; + break; + } + +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + if (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) + { + file_crc32 = (mz_uint32)mz_crc32(file_crc32, (const mz_uint8 *)pRead_buf, (size_t)read_buf_avail); + } +#endif + + if (pCallback(pOpaque, out_buf_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail) + { + mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED); + status = TINFL_STATUS_FAILED; + break; + } + + cur_file_ofs += read_buf_avail; + out_buf_ofs += read_buf_avail; + comp_remaining -= read_buf_avail; + } + } + } + else + { + tinfl_decompressor inflator; + tinfl_init(&inflator); + + if (NULL == (pWrite_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, TINFL_LZ_DICT_SIZE))) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + status = TINFL_STATUS_FAILED; + } + else + { + do + { + mz_uint8 *pWrite_buf_cur = (mz_uint8 *)pWrite_buf + (out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1)); + size_t in_buf_size, out_buf_size = TINFL_LZ_DICT_SIZE - (out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1)); + if ((!read_buf_avail) && (!pZip->m_pState->m_pMem)) + { + read_buf_avail = MZ_MIN(read_buf_size, comp_remaining); + if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + status = TINFL_STATUS_FAILED; + break; + } + cur_file_ofs += read_buf_avail; + comp_remaining -= read_buf_avail; + read_buf_ofs = 0; + } + + in_buf_size = (size_t)read_buf_avail; + status = tinfl_decompress(&inflator, (const mz_uint8 *)pRead_buf + read_buf_ofs, &in_buf_size, (mz_uint8 *)pWrite_buf, pWrite_buf_cur, &out_buf_size, comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0); + read_buf_avail -= in_buf_size; + read_buf_ofs += in_buf_size; + + if (out_buf_size) + { + if (pCallback(pOpaque, out_buf_ofs, pWrite_buf_cur, out_buf_size) != out_buf_size) + { + mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED); + status = TINFL_STATUS_FAILED; + break; + } + +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + file_crc32 = (mz_uint32)mz_crc32(file_crc32, pWrite_buf_cur, out_buf_size); +#endif + if ((out_buf_ofs += out_buf_size) > file_stat.m_uncomp_size) + { + mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED); + status = TINFL_STATUS_FAILED; + break; + } + } + } while ((status == TINFL_STATUS_NEEDS_MORE_INPUT) || (status == TINFL_STATUS_HAS_MORE_OUTPUT)); + } + } + + if ((status == TINFL_STATUS_DONE) && (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA))) + { + /* Make sure the entire file was decompressed, and check its CRC. */ + if (out_buf_ofs != file_stat.m_uncomp_size) + { + mz_zip_set_error(pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE); + status = TINFL_STATUS_FAILED; + } +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + else if (file_crc32 != file_stat.m_crc32) + { + mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED); + status = TINFL_STATUS_FAILED; + } +#endif + } + + if (!pZip->m_pState->m_pMem) + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + + if (pWrite_buf) + pZip->m_pFree(pZip->m_pAlloc_opaque, pWrite_buf); + + return status == TINFL_STATUS_DONE; +} + +mz_bool mz_zip_reader_extract_file_to_callback(mz_zip_archive *pZip, const char *pFilename, mz_file_write_func pCallback, void *pOpaque, mz_uint flags) +{ + mz_uint32 file_index; + if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index)) + return MZ_FALSE; + + return mz_zip_reader_extract_to_callback(pZip, file_index, pCallback, pOpaque, flags); +} + +mz_zip_reader_extract_iter_state* mz_zip_reader_extract_iter_new(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags) +{ + mz_zip_reader_extract_iter_state *pState; + mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32; + + /* Argument sanity check */ + if ((!pZip) || (!pZip->m_pState)) + return NULL; + + /* Allocate an iterator status structure */ + pState = (mz_zip_reader_extract_iter_state*)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_reader_extract_iter_state)); + if (!pState) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + return NULL; + } + + /* Fetch file details */ + if (!mz_zip_reader_file_stat(pZip, file_index, &pState->file_stat)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + /* Encryption and patch files are not supported. */ + if (pState->file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG)) + { + mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + /* This function only supports decompressing stored and deflate. */ + if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (pState->file_stat.m_method != 0) && (pState->file_stat.m_method != MZ_DEFLATED)) + { + mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + /* Init state - save args */ + pState->pZip = pZip; + pState->flags = flags; + + /* Init state - reset variables to defaults */ + pState->status = TINFL_STATUS_DONE; +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + pState->file_crc32 = MZ_CRC32_INIT; +#endif + pState->read_buf_ofs = 0; + pState->out_buf_ofs = 0; + pState->pRead_buf = NULL; + pState->pWrite_buf = NULL; + pState->out_blk_remain = 0; + + /* Read and parse the local directory entry. */ + pState->cur_file_ofs = pState->file_stat.m_local_header_ofs; + if (pZip->m_pRead(pZip->m_pIO_opaque, pState->cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + pState->cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS); + if ((pState->cur_file_ofs + pState->file_stat.m_comp_size) > pZip->m_archive_size) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + + /* Decompress the file either directly from memory or from a file input buffer. */ + if (pZip->m_pState->m_pMem) + { + pState->pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + pState->cur_file_ofs; + pState->read_buf_size = pState->read_buf_avail = pState->file_stat.m_comp_size; + pState->comp_remaining = pState->file_stat.m_comp_size; + } + else + { + if (!((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method))) + { + /* Decompression required, therefore intermediate read buffer required */ + pState->read_buf_size = MZ_MIN(pState->file_stat.m_comp_size, MZ_ZIP_MAX_IO_BUF_SIZE); + if (NULL == (pState->pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)pState->read_buf_size))) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + } + else + { + /* Decompression not required - we will be reading directly into user buffer, no temp buf required */ + pState->read_buf_size = 0; + } + pState->read_buf_avail = 0; + pState->comp_remaining = pState->file_stat.m_comp_size; + } + + if (!((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method))) + { + /* Decompression required, init decompressor */ + tinfl_init( &pState->inflator ); + + /* Allocate write buffer */ + if (NULL == (pState->pWrite_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, TINFL_LZ_DICT_SIZE))) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + if (pState->pRead_buf) + pZip->m_pFree(pZip->m_pAlloc_opaque, pState->pRead_buf); + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + return NULL; + } + } + + return pState; +} + +mz_zip_reader_extract_iter_state* mz_zip_reader_extract_file_iter_new(mz_zip_archive *pZip, const char *pFilename, mz_uint flags) +{ + mz_uint32 file_index; + + /* Locate file index by name */ + if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index)) + return NULL; + + /* Construct iterator */ + return mz_zip_reader_extract_iter_new(pZip, file_index, flags); +} + +size_t mz_zip_reader_extract_iter_read(mz_zip_reader_extract_iter_state* pState, void* pvBuf, size_t buf_size) +{ + size_t copied_to_caller = 0; + + /* Argument sanity check */ + if ((!pState) || (!pState->pZip) || (!pState->pZip->m_pState) || (!pvBuf)) + return 0; + + if ((pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method)) + { + /* The file is stored or the caller has requested the compressed data, calc amount to return. */ + copied_to_caller = (size_t)MZ_MIN( buf_size, pState->comp_remaining ); + + /* Zip is in memory....or requires reading from a file? */ + if (pState->pZip->m_pState->m_pMem) + { + /* Copy data to caller's buffer */ + memcpy( pvBuf, pState->pRead_buf, copied_to_caller ); + pState->pRead_buf = ((mz_uint8*)pState->pRead_buf) + copied_to_caller; + } + else + { + /* Read directly into caller's buffer */ + if (pState->pZip->m_pRead(pState->pZip->m_pIO_opaque, pState->cur_file_ofs, pvBuf, copied_to_caller) != copied_to_caller) + { + /* Failed to read all that was asked for, flag failure and alert user */ + mz_zip_set_error(pState->pZip, MZ_ZIP_FILE_READ_FAILED); + pState->status = TINFL_STATUS_FAILED; + copied_to_caller = 0; + } + } + +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + /* Compute CRC if not returning compressed data only */ + if (!(pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) + pState->file_crc32 = (mz_uint32)mz_crc32(pState->file_crc32, (const mz_uint8 *)pvBuf, copied_to_caller); +#endif + + /* Advance offsets, dec counters */ + pState->cur_file_ofs += copied_to_caller; + pState->out_buf_ofs += copied_to_caller; + pState->comp_remaining -= copied_to_caller; + } + else + { + do + { + /* Calc ptr to write buffer - given current output pos and block size */ + mz_uint8 *pWrite_buf_cur = (mz_uint8 *)pState->pWrite_buf + (pState->out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1)); + + /* Calc max output size - given current output pos and block size */ + size_t in_buf_size, out_buf_size = TINFL_LZ_DICT_SIZE - (pState->out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1)); + + if (!pState->out_blk_remain) + { + /* Read more data from file if none available (and reading from file) */ + if ((!pState->read_buf_avail) && (!pState->pZip->m_pState->m_pMem)) + { + /* Calc read size */ + pState->read_buf_avail = MZ_MIN(pState->read_buf_size, pState->comp_remaining); + if (pState->pZip->m_pRead(pState->pZip->m_pIO_opaque, pState->cur_file_ofs, pState->pRead_buf, (size_t)pState->read_buf_avail) != pState->read_buf_avail) + { + mz_zip_set_error(pState->pZip, MZ_ZIP_FILE_READ_FAILED); + pState->status = TINFL_STATUS_FAILED; + break; + } + + /* Advance offsets, dec counters */ + pState->cur_file_ofs += pState->read_buf_avail; + pState->comp_remaining -= pState->read_buf_avail; + pState->read_buf_ofs = 0; + } + + /* Perform decompression */ + in_buf_size = (size_t)pState->read_buf_avail; + pState->status = tinfl_decompress(&pState->inflator, (const mz_uint8 *)pState->pRead_buf + pState->read_buf_ofs, &in_buf_size, (mz_uint8 *)pState->pWrite_buf, pWrite_buf_cur, &out_buf_size, pState->comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0); + pState->read_buf_avail -= in_buf_size; + pState->read_buf_ofs += in_buf_size; + + /* Update current output block size remaining */ + pState->out_blk_remain = out_buf_size; + } + + if (pState->out_blk_remain) + { + /* Calc amount to return. */ + size_t to_copy = MZ_MIN( (buf_size - copied_to_caller), pState->out_blk_remain ); + + /* Copy data to caller's buffer */ + memcpy( (uint8_t*)pvBuf + copied_to_caller, pWrite_buf_cur, to_copy ); + +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + /* Perform CRC */ + pState->file_crc32 = (mz_uint32)mz_crc32(pState->file_crc32, pWrite_buf_cur, to_copy); +#endif + + /* Decrement data consumed from block */ + pState->out_blk_remain -= to_copy; + + /* Inc output offset, while performing sanity check */ + if ((pState->out_buf_ofs += to_copy) > pState->file_stat.m_uncomp_size) + { + mz_zip_set_error(pState->pZip, MZ_ZIP_DECOMPRESSION_FAILED); + pState->status = TINFL_STATUS_FAILED; + break; + } + + /* Increment counter of data copied to caller */ + copied_to_caller += to_copy; + } + } while ( (copied_to_caller < buf_size) && ((pState->status == TINFL_STATUS_NEEDS_MORE_INPUT) || (pState->status == TINFL_STATUS_HAS_MORE_OUTPUT)) ); + } + + /* Return how many bytes were copied into user buffer */ + return copied_to_caller; +} + +mz_bool mz_zip_reader_extract_iter_free(mz_zip_reader_extract_iter_state* pState) +{ + int status; + + /* Argument sanity check */ + if ((!pState) || (!pState->pZip) || (!pState->pZip->m_pState)) + return MZ_FALSE; + + /* Was decompression completed and requested? */ + if ((pState->status == TINFL_STATUS_DONE) && (!(pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA))) + { + /* Make sure the entire file was decompressed, and check its CRC. */ + if (pState->out_buf_ofs != pState->file_stat.m_uncomp_size) + { + mz_zip_set_error(pState->pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE); + pState->status = TINFL_STATUS_FAILED; + } +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + else if (pState->file_crc32 != pState->file_stat.m_crc32) + { + mz_zip_set_error(pState->pZip, MZ_ZIP_DECOMPRESSION_FAILED); + pState->status = TINFL_STATUS_FAILED; + } +#endif + } + + /* Free buffers */ + if (!pState->pZip->m_pState->m_pMem) + pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState->pRead_buf); + if (pState->pWrite_buf) + pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState->pWrite_buf); + + /* Save status */ + status = pState->status; + + /* Free context */ + pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState); + + return status == TINFL_STATUS_DONE; +} + +#ifndef MINIZ_NO_STDIO +static size_t mz_zip_file_write_callback(void *pOpaque, mz_uint64 ofs, const void *pBuf, size_t n) +{ + (void)ofs; + + return MZ_FWRITE(pBuf, 1, n, (MZ_FILE *)pOpaque); +} + +mz_bool mz_zip_reader_extract_to_file(mz_zip_archive *pZip, mz_uint file_index, const char *pDst_filename, mz_uint flags) +{ + mz_bool status; + mz_zip_archive_file_stat file_stat; + MZ_FILE *pFile; + + if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat)) + return MZ_FALSE; + + if ((file_stat.m_is_directory) || (!file_stat.m_is_supported)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE); + + pFile = MZ_FOPEN(pDst_filename, "wb"); + if (!pFile) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + + status = mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_file_write_callback, pFile, flags); + + if (MZ_FCLOSE(pFile) == EOF) + { + if (status) + mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED); + + status = MZ_FALSE; + } + +#if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_STDIO) + if (status) + mz_zip_set_file_times(pDst_filename, file_stat.m_time, file_stat.m_time); +#endif + + return status; +} + +mz_bool mz_zip_reader_extract_file_to_file(mz_zip_archive *pZip, const char *pArchive_filename, const char *pDst_filename, mz_uint flags) +{ + mz_uint32 file_index; + if (!mz_zip_reader_locate_file_v2(pZip, pArchive_filename, NULL, flags, &file_index)) + return MZ_FALSE; + + return mz_zip_reader_extract_to_file(pZip, file_index, pDst_filename, flags); +} + +mz_bool mz_zip_reader_extract_to_cfile(mz_zip_archive *pZip, mz_uint file_index, MZ_FILE *pFile, mz_uint flags) +{ + mz_zip_archive_file_stat file_stat; + + if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat)) + return MZ_FALSE; + + if ((file_stat.m_is_directory) || (!file_stat.m_is_supported)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE); + + return mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_file_write_callback, pFile, flags); +} + +mz_bool mz_zip_reader_extract_file_to_cfile(mz_zip_archive *pZip, const char *pArchive_filename, MZ_FILE *pFile, mz_uint flags) +{ + mz_uint32 file_index; + if (!mz_zip_reader_locate_file_v2(pZip, pArchive_filename, NULL, flags, &file_index)) + return MZ_FALSE; + + return mz_zip_reader_extract_to_cfile(pZip, file_index, pFile, flags); +} +#endif /* #ifndef MINIZ_NO_STDIO */ + +static size_t mz_zip_compute_crc32_callback(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n) +{ + mz_uint32 *p = (mz_uint32 *)pOpaque; + (void)file_ofs; + *p = (mz_uint32)mz_crc32(*p, (const mz_uint8 *)pBuf, n); + return n; +} + +mz_bool mz_zip_validate_file(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags) +{ + mz_zip_archive_file_stat file_stat; + mz_zip_internal_state *pState; + const mz_uint8 *pCentral_dir_header; + mz_bool found_zip64_ext_data_in_cdir = MZ_FALSE; + mz_bool found_zip64_ext_data_in_ldir = MZ_FALSE; + mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32; + mz_uint64 local_header_ofs = 0; + mz_uint32 local_header_filename_len, local_header_extra_len, local_header_crc32; + mz_uint64 local_header_comp_size, local_header_uncomp_size; + mz_uint32 uncomp_crc32 = MZ_CRC32_INIT; + mz_bool has_data_descriptor; + mz_uint32 local_header_bit_flags; + + mz_zip_array file_data_array; + mz_zip_array_init(&file_data_array, 1); + + if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (file_index > pZip->m_total_files) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + pCentral_dir_header = mz_zip_get_cdh(pZip, file_index); + + if (!mz_zip_file_stat_internal(pZip, file_index, pCentral_dir_header, &file_stat, &found_zip64_ext_data_in_cdir)) + return MZ_FALSE; + + /* A directory or zero length file */ + if ((file_stat.m_is_directory) || (!file_stat.m_uncomp_size)) + return MZ_TRUE; + + /* Encryption and patch files are not supported. */ + if (file_stat.m_is_encrypted) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION); + + /* This function only supports stored and deflate. */ + if ((file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED)) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD); + + if (!file_stat.m_is_supported) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE); + + /* Read and parse the local directory entry. */ + local_header_ofs = file_stat.m_local_header_ofs; + if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + local_header_filename_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS); + local_header_extra_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS); + local_header_comp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS); + local_header_uncomp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS); + local_header_crc32 = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_CRC32_OFS); + local_header_bit_flags = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_BIT_FLAG_OFS); + has_data_descriptor = (local_header_bit_flags & 8) != 0; + + if (local_header_filename_len != strlen(file_stat.m_filename)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if ((local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len + local_header_extra_len + file_stat.m_comp_size) > pZip->m_archive_size) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if (!mz_zip_array_resize(pZip, &file_data_array, MZ_MAX(local_header_filename_len, local_header_extra_len), MZ_FALSE)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + if (local_header_filename_len) + { + if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE, file_data_array.m_p, local_header_filename_len) != local_header_filename_len) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + goto handle_failure; + } + + /* I've seen 1 archive that had the same pathname, but used backslashes in the local dir and forward slashes in the central dir. Do we care about this? For now, this case will fail validation. */ + if (memcmp(file_stat.m_filename, file_data_array.m_p, local_header_filename_len) != 0) + { + mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED); + goto handle_failure; + } + } + + if ((local_header_extra_len) && ((local_header_comp_size == MZ_UINT32_MAX) || (local_header_uncomp_size == MZ_UINT32_MAX))) + { + mz_uint32 extra_size_remaining = local_header_extra_len; + const mz_uint8 *pExtra_data = (const mz_uint8 *)file_data_array.m_p; + + if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len, file_data_array.m_p, local_header_extra_len) != local_header_extra_len) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + goto handle_failure; + } + + do + { + mz_uint32 field_id, field_data_size, field_total_size; + + if (extra_size_remaining < (sizeof(mz_uint16) * 2)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + field_id = MZ_READ_LE16(pExtra_data); + field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16)); + field_total_size = field_data_size + sizeof(mz_uint16) * 2; + + if (field_total_size > extra_size_remaining) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) + { + const mz_uint8 *pSrc_field_data = pExtra_data + sizeof(mz_uint32); + + if (field_data_size < sizeof(mz_uint64) * 2) + { + mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + goto handle_failure; + } + + local_header_uncomp_size = MZ_READ_LE64(pSrc_field_data); + local_header_comp_size = MZ_READ_LE64(pSrc_field_data + sizeof(mz_uint64)); + + found_zip64_ext_data_in_ldir = MZ_TRUE; + break; + } + + pExtra_data += field_total_size; + extra_size_remaining -= field_total_size; + } while (extra_size_remaining); + } + + /* TODO: parse local header extra data when local_header_comp_size is 0xFFFFFFFF! (big_descriptor.zip) */ + /* I've seen zips in the wild with the data descriptor bit set, but proper local header values and bogus data descriptors */ + if ((has_data_descriptor) && (!local_header_comp_size) && (!local_header_crc32)) + { + mz_uint8 descriptor_buf[32]; + mz_bool has_id; + const mz_uint8 *pSrc; + mz_uint32 file_crc32; + mz_uint64 comp_size = 0, uncomp_size = 0; + + mz_uint32 num_descriptor_uint32s = ((pState->m_zip64) || (found_zip64_ext_data_in_ldir)) ? 6 : 4; + + if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len + local_header_extra_len + file_stat.m_comp_size, descriptor_buf, sizeof(mz_uint32) * num_descriptor_uint32s) != (sizeof(mz_uint32) * num_descriptor_uint32s)) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + goto handle_failure; + } + + has_id = (MZ_READ_LE32(descriptor_buf) == MZ_ZIP_DATA_DESCRIPTOR_ID); + pSrc = has_id ? (descriptor_buf + sizeof(mz_uint32)) : descriptor_buf; + + file_crc32 = MZ_READ_LE32(pSrc); + + if ((pState->m_zip64) || (found_zip64_ext_data_in_ldir)) + { + comp_size = MZ_READ_LE64(pSrc + sizeof(mz_uint32)); + uncomp_size = MZ_READ_LE64(pSrc + sizeof(mz_uint32) + sizeof(mz_uint64)); + } + else + { + comp_size = MZ_READ_LE32(pSrc + sizeof(mz_uint32)); + uncomp_size = MZ_READ_LE32(pSrc + sizeof(mz_uint32) + sizeof(mz_uint32)); + } + + if ((file_crc32 != file_stat.m_crc32) || (comp_size != file_stat.m_comp_size) || (uncomp_size != file_stat.m_uncomp_size)) + { + mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED); + goto handle_failure; + } + } + else + { + if ((local_header_crc32 != file_stat.m_crc32) || (local_header_comp_size != file_stat.m_comp_size) || (local_header_uncomp_size != file_stat.m_uncomp_size)) + { + mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED); + goto handle_failure; + } + } + + mz_zip_array_clear(pZip, &file_data_array); + + if ((flags & MZ_ZIP_FLAG_VALIDATE_HEADERS_ONLY) == 0) + { + if (!mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_compute_crc32_callback, &uncomp_crc32, 0)) + return MZ_FALSE; + + /* 1 more check to be sure, although the extract checks too. */ + if (uncomp_crc32 != file_stat.m_crc32) + { + mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED); + return MZ_FALSE; + } + } + + return MZ_TRUE; + +handle_failure: + mz_zip_array_clear(pZip, &file_data_array); + return MZ_FALSE; +} + +mz_bool mz_zip_validate_archive(mz_zip_archive *pZip, mz_uint flags) +{ + mz_zip_internal_state *pState; + uint32_t i; + + if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + /* Basic sanity checks */ + if (!pState->m_zip64) + { + if (pZip->m_total_files > MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + if (pZip->m_archive_size > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + } + else + { + if (pZip->m_total_files >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + if (pState->m_central_dir.m_size >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + } + + for (i = 0; i < pZip->m_total_files; i++) + { + if (MZ_ZIP_FLAG_VALIDATE_LOCATE_FILE_FLAG & flags) + { + mz_uint32 found_index; + mz_zip_archive_file_stat stat; + + if (!mz_zip_reader_file_stat(pZip, i, &stat)) + return MZ_FALSE; + + if (!mz_zip_reader_locate_file_v2(pZip, stat.m_filename, NULL, 0, &found_index)) + return MZ_FALSE; + + /* This check can fail if there are duplicate filenames in the archive (which we don't check for when writing - that's up to the user) */ + if (found_index != i) + return mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED); + } + + if (!mz_zip_validate_file(pZip, i, flags)) + return MZ_FALSE; + } + + return MZ_TRUE; +} + +mz_bool mz_zip_validate_mem_archive(const void *pMem, size_t size, mz_uint flags, mz_zip_error *pErr) +{ + mz_bool success = MZ_TRUE; + mz_zip_archive zip; + mz_zip_error actual_err = MZ_ZIP_NO_ERROR; + + if ((!pMem) || (!size)) + { + if (pErr) + *pErr = MZ_ZIP_INVALID_PARAMETER; + return MZ_FALSE; + } + + mz_zip_zero_struct(&zip); + + if (!mz_zip_reader_init_mem(&zip, pMem, size, flags)) + { + if (pErr) + *pErr = zip.m_last_error; + return MZ_FALSE; + } + + if (!mz_zip_validate_archive(&zip, flags)) + { + actual_err = zip.m_last_error; + success = MZ_FALSE; + } + + if (!mz_zip_reader_end_internal(&zip, success)) + { + if (!actual_err) + actual_err = zip.m_last_error; + success = MZ_FALSE; + } + + if (pErr) + *pErr = actual_err; + + return success; +} + +#ifndef MINIZ_NO_STDIO +mz_bool mz_zip_validate_file_archive(const char *pFilename, mz_uint flags, mz_zip_error *pErr) +{ + mz_bool success = MZ_TRUE; + mz_zip_archive zip; + mz_zip_error actual_err = MZ_ZIP_NO_ERROR; + + if (!pFilename) + { + if (pErr) + *pErr = MZ_ZIP_INVALID_PARAMETER; + return MZ_FALSE; + } + + mz_zip_zero_struct(&zip); + + if (!mz_zip_reader_init_file_v2(&zip, pFilename, flags, 0, 0)) + { + if (pErr) + *pErr = zip.m_last_error; + return MZ_FALSE; + } + + if (!mz_zip_validate_archive(&zip, flags)) + { + actual_err = zip.m_last_error; + success = MZ_FALSE; + } + + if (!mz_zip_reader_end_internal(&zip, success)) + { + if (!actual_err) + actual_err = zip.m_last_error; + success = MZ_FALSE; + } + + if (pErr) + *pErr = actual_err; + + return success; +} +#endif /* #ifndef MINIZ_NO_STDIO */ + +/* ------------------- .ZIP archive writing */ + +#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS + +static MZ_FORCEINLINE void mz_write_le16(mz_uint8 *p, mz_uint16 v) +{ + p[0] = (mz_uint8)v; + p[1] = (mz_uint8)(v >> 8); +} +static MZ_FORCEINLINE void mz_write_le32(mz_uint8 *p, mz_uint32 v) +{ + p[0] = (mz_uint8)v; + p[1] = (mz_uint8)(v >> 8); + p[2] = (mz_uint8)(v >> 16); + p[3] = (mz_uint8)(v >> 24); +} +static MZ_FORCEINLINE void mz_write_le64(mz_uint8 *p, mz_uint64 v) +{ + mz_write_le32(p, (mz_uint32)v); + mz_write_le32(p + sizeof(mz_uint32), (mz_uint32)(v >> 32)); +} + +#define MZ_WRITE_LE16(p, v) mz_write_le16((mz_uint8 *)(p), (mz_uint16)(v)) +#define MZ_WRITE_LE32(p, v) mz_write_le32((mz_uint8 *)(p), (mz_uint32)(v)) +#define MZ_WRITE_LE64(p, v) mz_write_le64((mz_uint8 *)(p), (mz_uint64)(v)) + +static size_t mz_zip_heap_write_func(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n) +{ + mz_zip_archive *pZip = (mz_zip_archive *)pOpaque; + mz_zip_internal_state *pState = pZip->m_pState; + mz_uint64 new_size = MZ_MAX(file_ofs + n, pState->m_mem_size); + + if (!n) + return 0; + + /* An allocation this big is likely to just fail on 32-bit systems, so don't even go there. */ + if ((sizeof(size_t) == sizeof(mz_uint32)) && (new_size > 0x7FFFFFFF)) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE); + return 0; + } + + if (new_size > pState->m_mem_capacity) + { + void *pNew_block; + size_t new_capacity = MZ_MAX(64, pState->m_mem_capacity); + + while (new_capacity < new_size) + new_capacity *= 2; + + if (NULL == (pNew_block = pZip->m_pRealloc(pZip->m_pAlloc_opaque, pState->m_pMem, 1, new_capacity))) + { + mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + return 0; + } + + pState->m_pMem = pNew_block; + pState->m_mem_capacity = new_capacity; + } + memcpy((mz_uint8 *)pState->m_pMem + file_ofs, pBuf, n); + pState->m_mem_size = (size_t)new_size; + return n; +} + +static mz_bool mz_zip_writer_end_internal(mz_zip_archive *pZip, mz_bool set_last_error) +{ + mz_zip_internal_state *pState; + mz_bool status = MZ_TRUE; + + if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || ((pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) && (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED))) + { + if (set_last_error) + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return MZ_FALSE; + } + + pState = pZip->m_pState; + pZip->m_pState = NULL; + mz_zip_array_clear(pZip, &pState->m_central_dir); + mz_zip_array_clear(pZip, &pState->m_central_dir_offsets); + mz_zip_array_clear(pZip, &pState->m_sorted_central_dir_offsets); + +#ifndef MINIZ_NO_STDIO + if (pState->m_pFile) + { + if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE) + { + if (MZ_FCLOSE(pState->m_pFile) == EOF) + { + if (set_last_error) + mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED); + status = MZ_FALSE; + } + } + + pState->m_pFile = NULL; + } +#endif /* #ifndef MINIZ_NO_STDIO */ + + if ((pZip->m_pWrite == mz_zip_heap_write_func) && (pState->m_pMem)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pState->m_pMem); + pState->m_pMem = NULL; + } + + pZip->m_pFree(pZip->m_pAlloc_opaque, pState); + pZip->m_zip_mode = MZ_ZIP_MODE_INVALID; + return status; +} + +mz_bool mz_zip_writer_init_v2(mz_zip_archive *pZip, mz_uint64 existing_size, mz_uint flags) +{ + mz_bool zip64 = (flags & MZ_ZIP_FLAG_WRITE_ZIP64) != 0; + + if ((!pZip) || (pZip->m_pState) || (!pZip->m_pWrite) || (pZip->m_zip_mode != MZ_ZIP_MODE_INVALID)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) + { + if (!pZip->m_pRead) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + } + + if (pZip->m_file_offset_alignment) + { + /* Ensure user specified file offset alignment is a power of 2. */ + if (pZip->m_file_offset_alignment & (pZip->m_file_offset_alignment - 1)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + } + + if (!pZip->m_pAlloc) + pZip->m_pAlloc = miniz_def_alloc_func; + if (!pZip->m_pFree) + pZip->m_pFree = miniz_def_free_func; + if (!pZip->m_pRealloc) + pZip->m_pRealloc = miniz_def_realloc_func; + + pZip->m_archive_size = existing_size; + pZip->m_central_directory_file_ofs = 0; + pZip->m_total_files = 0; + + if (NULL == (pZip->m_pState = (mz_zip_internal_state *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_internal_state)))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + memset(pZip->m_pState, 0, sizeof(mz_zip_internal_state)); + + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir, sizeof(mz_uint8)); + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir_offsets, sizeof(mz_uint32)); + MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_sorted_central_dir_offsets, sizeof(mz_uint32)); + + pZip->m_pState->m_zip64 = zip64; + pZip->m_pState->m_zip64_has_extended_info_fields = zip64; + + pZip->m_zip_type = MZ_ZIP_TYPE_USER; + pZip->m_zip_mode = MZ_ZIP_MODE_WRITING; + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_init(mz_zip_archive *pZip, mz_uint64 existing_size) +{ + return mz_zip_writer_init_v2(pZip, existing_size, 0); +} + +mz_bool mz_zip_writer_init_heap_v2(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size, mz_uint flags) +{ + pZip->m_pWrite = mz_zip_heap_write_func; + pZip->m_pNeeds_keepalive = NULL; + + if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) + pZip->m_pRead = mz_zip_mem_read_func; + + pZip->m_pIO_opaque = pZip; + + if (!mz_zip_writer_init_v2(pZip, size_to_reserve_at_beginning, flags)) + return MZ_FALSE; + + pZip->m_zip_type = MZ_ZIP_TYPE_HEAP; + + if (0 != (initial_allocation_size = MZ_MAX(initial_allocation_size, size_to_reserve_at_beginning))) + { + if (NULL == (pZip->m_pState->m_pMem = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, initial_allocation_size))) + { + mz_zip_writer_end_internal(pZip, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + pZip->m_pState->m_mem_capacity = initial_allocation_size; + } + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_init_heap(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size) +{ + return mz_zip_writer_init_heap_v2(pZip, size_to_reserve_at_beginning, initial_allocation_size, 0); +} + +#ifndef MINIZ_NO_STDIO +static size_t mz_zip_file_write_func(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n) +{ + mz_zip_archive *pZip = (mz_zip_archive *)pOpaque; + mz_int64 cur_ofs = MZ_FTELL64(pZip->m_pState->m_pFile); + + file_ofs += pZip->m_pState->m_file_archive_start_ofs; + + if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pZip->m_pState->m_pFile, (mz_int64)file_ofs, SEEK_SET)))) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED); + return 0; + } + + return MZ_FWRITE(pBuf, 1, n, pZip->m_pState->m_pFile); +} + +mz_bool mz_zip_writer_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning) +{ + return mz_zip_writer_init_file_v2(pZip, pFilename, size_to_reserve_at_beginning, 0); +} + +mz_bool mz_zip_writer_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning, mz_uint flags) +{ + MZ_FILE *pFile; + + pZip->m_pWrite = mz_zip_file_write_func; + pZip->m_pNeeds_keepalive = NULL; + + if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) + pZip->m_pRead = mz_zip_file_read_func; + + pZip->m_pIO_opaque = pZip; + + if (!mz_zip_writer_init_v2(pZip, size_to_reserve_at_beginning, flags)) + return MZ_FALSE; + + if (NULL == (pFile = MZ_FOPEN(pFilename, (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) ? "w+b" : "wb"))) + { + mz_zip_writer_end(pZip); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + } + + pZip->m_pState->m_pFile = pFile; + pZip->m_zip_type = MZ_ZIP_TYPE_FILE; + + if (size_to_reserve_at_beginning) + { + mz_uint64 cur_ofs = 0; + char buf[4096]; + + MZ_CLEAR_OBJ(buf); + + do + { + size_t n = (size_t)MZ_MIN(sizeof(buf), size_to_reserve_at_beginning); + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_ofs, buf, n) != n) + { + mz_zip_writer_end(pZip); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + cur_ofs += n; + size_to_reserve_at_beginning -= n; + } while (size_to_reserve_at_beginning); + } + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint flags) +{ + pZip->m_pWrite = mz_zip_file_write_func; + pZip->m_pNeeds_keepalive = NULL; + + if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) + pZip->m_pRead = mz_zip_file_read_func; + + pZip->m_pIO_opaque = pZip; + + if (!mz_zip_writer_init_v2(pZip, 0, flags)) + return MZ_FALSE; + + pZip->m_pState->m_pFile = pFile; + pZip->m_pState->m_file_archive_start_ofs = MZ_FTELL64(pZip->m_pState->m_pFile); + pZip->m_zip_type = MZ_ZIP_TYPE_CFILE; + + return MZ_TRUE; +} +#endif /* #ifndef MINIZ_NO_STDIO */ + +mz_bool mz_zip_writer_init_from_reader_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags) +{ + mz_zip_internal_state *pState; + + if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_READING)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (flags & MZ_ZIP_FLAG_WRITE_ZIP64) + { + /* We don't support converting a non-zip64 file to zip64 - this seems like more trouble than it's worth. (What about the existing 32-bit data descriptors that could follow the compressed data?) */ + if (!pZip->m_pState->m_zip64) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + } + + /* No sense in trying to write to an archive that's already at the support max size */ + if (pZip->m_pState->m_zip64) + { + if (pZip->m_total_files == MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + else + { + if (pZip->m_total_files == MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + + if ((pZip->m_archive_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_ZIP_LOCAL_DIR_HEADER_SIZE) > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE); + } + + pState = pZip->m_pState; + + if (pState->m_pFile) + { +#ifdef MINIZ_NO_STDIO + (void)pFilename; + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); +#else + if (pZip->m_pIO_opaque != pZip) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE) + { + if (!pFilename) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + /* Archive is being read from stdio and was originally opened only for reading. Try to reopen as writable. */ + if (NULL == (pState->m_pFile = MZ_FREOPEN(pFilename, "r+b", pState->m_pFile))) + { + /* The mz_zip_archive is now in a bogus state because pState->m_pFile is NULL, so just close it. */ + mz_zip_reader_end_internal(pZip, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + } + } + + pZip->m_pWrite = mz_zip_file_write_func; + pZip->m_pNeeds_keepalive = NULL; +#endif /* #ifdef MINIZ_NO_STDIO */ + } + else if (pState->m_pMem) + { + /* Archive lives in a memory block. Assume it's from the heap that we can resize using the realloc callback. */ + if (pZip->m_pIO_opaque != pZip) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState->m_mem_capacity = pState->m_mem_size; + pZip->m_pWrite = mz_zip_heap_write_func; + pZip->m_pNeeds_keepalive = NULL; + } + /* Archive is being read via a user provided read function - make sure the user has specified a write function too. */ + else if (!pZip->m_pWrite) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + /* Start writing new files at the archive's current central directory location. */ + /* TODO: We could add a flag that lets the user start writing immediately AFTER the existing central dir - this would be safer. */ + pZip->m_archive_size = pZip->m_central_directory_file_ofs; + pZip->m_central_directory_file_ofs = 0; + + /* Clear the sorted central dir offsets, they aren't useful or maintained now. */ + /* Even though we're now in write mode, files can still be extracted and verified, but file locates will be slow. */ + /* TODO: We could easily maintain the sorted central directory offsets. */ + mz_zip_array_clear(pZip, &pZip->m_pState->m_sorted_central_dir_offsets); + + pZip->m_zip_mode = MZ_ZIP_MODE_WRITING; + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_init_from_reader(mz_zip_archive *pZip, const char *pFilename) +{ + return mz_zip_writer_init_from_reader_v2(pZip, pFilename, 0); +} + +/* TODO: pArchive_name is a terrible name here! */ +mz_bool mz_zip_writer_add_mem(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, mz_uint level_and_flags) +{ + return mz_zip_writer_add_mem_ex(pZip, pArchive_name, pBuf, buf_size, NULL, 0, level_and_flags, 0, 0); +} + +typedef struct +{ + mz_zip_archive *m_pZip; + mz_uint64 m_cur_archive_file_ofs; + mz_uint64 m_comp_size; +} mz_zip_writer_add_state; + +static mz_bool mz_zip_writer_add_put_buf_callback(const void *pBuf, int len, void *pUser) +{ + mz_zip_writer_add_state *pState = (mz_zip_writer_add_state *)pUser; + if ((int)pState->m_pZip->m_pWrite(pState->m_pZip->m_pIO_opaque, pState->m_cur_archive_file_ofs, pBuf, len) != len) + return MZ_FALSE; + + pState->m_cur_archive_file_ofs += len; + pState->m_comp_size += len; + return MZ_TRUE; +} + +#define MZ_ZIP64_MAX_LOCAL_EXTRA_FIELD_SIZE (sizeof(mz_uint16) * 2 + sizeof(mz_uint64) * 2) +#define MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE (sizeof(mz_uint16) * 2 + sizeof(mz_uint64) * 3) +static mz_uint32 mz_zip_writer_create_zip64_extra_data(mz_uint8 *pBuf, mz_uint64 *pUncomp_size, mz_uint64 *pComp_size, mz_uint64 *pLocal_header_ofs) +{ + mz_uint8 *pDst = pBuf; + mz_uint32 field_size = 0; + + MZ_WRITE_LE16(pDst + 0, MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID); + MZ_WRITE_LE16(pDst + 2, 0); + pDst += sizeof(mz_uint16) * 2; + + if (pUncomp_size) + { + MZ_WRITE_LE64(pDst, *pUncomp_size); + pDst += sizeof(mz_uint64); + field_size += sizeof(mz_uint64); + } + + if (pComp_size) + { + MZ_WRITE_LE64(pDst, *pComp_size); + pDst += sizeof(mz_uint64); + field_size += sizeof(mz_uint64); + } + + if (pLocal_header_ofs) + { + MZ_WRITE_LE64(pDst, *pLocal_header_ofs); + pDst += sizeof(mz_uint64); + field_size += sizeof(mz_uint64); + } + + MZ_WRITE_LE16(pBuf + 2, field_size); + + return (mz_uint32)(pDst - pBuf); +} + +static mz_bool mz_zip_writer_create_local_dir_header(mz_zip_archive *pZip, mz_uint8 *pDst, mz_uint16 filename_size, mz_uint16 extra_size, mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32, mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date) +{ + (void)pZip; + memset(pDst, 0, MZ_ZIP_LOCAL_DIR_HEADER_SIZE); + MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_SIG_OFS, MZ_ZIP_LOCAL_DIR_HEADER_SIG); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_VERSION_NEEDED_OFS, method ? 20 : 0); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_BIT_FLAG_OFS, bit_flags); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_METHOD_OFS, method); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILE_TIME_OFS, dos_time); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILE_DATE_OFS, dos_date); + MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_CRC32_OFS, uncomp_crc32); + MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS, MZ_MIN(comp_size, MZ_UINT32_MAX)); + MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS, MZ_MIN(uncomp_size, MZ_UINT32_MAX)); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILENAME_LEN_OFS, filename_size); + MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_EXTRA_LEN_OFS, extra_size); + return MZ_TRUE; +} + +static mz_bool mz_zip_writer_create_central_dir_header(mz_zip_archive *pZip, mz_uint8 *pDst, + mz_uint16 filename_size, mz_uint16 extra_size, mz_uint16 comment_size, + mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32, + mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date, + mz_uint64 local_header_ofs, mz_uint32 ext_attributes) +{ + (void)pZip; + memset(pDst, 0, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_SIG_OFS, MZ_ZIP_CENTRAL_DIR_HEADER_SIG); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_VERSION_NEEDED_OFS, method ? 20 : 0); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_BIT_FLAG_OFS, bit_flags); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_METHOD_OFS, method); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILE_TIME_OFS, dos_time); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILE_DATE_OFS, dos_date); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_CRC32_OFS, uncomp_crc32); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS, MZ_MIN(comp_size, MZ_UINT32_MAX)); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS, MZ_MIN(uncomp_size, MZ_UINT32_MAX)); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILENAME_LEN_OFS, filename_size); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_EXTRA_LEN_OFS, extra_size); + MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_COMMENT_LEN_OFS, comment_size); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS, ext_attributes); + MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_LOCAL_HEADER_OFS, MZ_MIN(local_header_ofs, MZ_UINT32_MAX)); + return MZ_TRUE; +} + +static mz_bool mz_zip_writer_add_to_central_dir(mz_zip_archive *pZip, const char *pFilename, mz_uint16 filename_size, + const void *pExtra, mz_uint16 extra_size, const void *pComment, mz_uint16 comment_size, + mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32, + mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date, + mz_uint64 local_header_ofs, mz_uint32 ext_attributes, + const char *user_extra_data, mz_uint user_extra_data_len) +{ + mz_zip_internal_state *pState = pZip->m_pState; + mz_uint32 central_dir_ofs = (mz_uint32)pState->m_central_dir.m_size; + size_t orig_central_dir_size = pState->m_central_dir.m_size; + mz_uint8 central_dir_header[MZ_ZIP_CENTRAL_DIR_HEADER_SIZE]; + + if (!pZip->m_pState->m_zip64) + { + if (local_header_ofs > 0xFFFFFFFF) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE); + } + + /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */ + if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size + extra_size + user_extra_data_len + comment_size) >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + + if (!mz_zip_writer_create_central_dir_header(pZip, central_dir_header, filename_size, (mz_uint16)(extra_size + user_extra_data_len), comment_size, uncomp_size, comp_size, uncomp_crc32, method, bit_flags, dos_time, dos_date, local_header_ofs, ext_attributes)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if ((!mz_zip_array_push_back(pZip, &pState->m_central_dir, central_dir_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)) || + (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pFilename, filename_size)) || + (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pExtra, extra_size)) || + (!mz_zip_array_push_back(pZip, &pState->m_central_dir, user_extra_data, user_extra_data_len)) || + (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pComment, comment_size)) || + (!mz_zip_array_push_back(pZip, &pState->m_central_dir_offsets, ¢ral_dir_ofs, 1))) + { + /* Try to resize the central directory array back into its original state. */ + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + return MZ_TRUE; +} + +static mz_bool mz_zip_writer_validate_archive_name(const char *pArchive_name) +{ + /* Basic ZIP archive filename validity checks: Valid filenames cannot start with a forward slash, cannot contain a drive letter, and cannot use DOS-style backward slashes. */ + if (*pArchive_name == '/') + return MZ_FALSE; + + /* Making sure the name does not contain drive letters or DOS style backward slashes is the responsibility of the program using miniz*/ + + return MZ_TRUE; +} + +static mz_uint mz_zip_writer_compute_padding_needed_for_file_alignment(mz_zip_archive *pZip) +{ + mz_uint32 n; + if (!pZip->m_file_offset_alignment) + return 0; + n = (mz_uint32)(pZip->m_archive_size & (pZip->m_file_offset_alignment - 1)); + return (mz_uint)((pZip->m_file_offset_alignment - n) & (pZip->m_file_offset_alignment - 1)); +} + +static mz_bool mz_zip_writer_write_zeros(mz_zip_archive *pZip, mz_uint64 cur_file_ofs, mz_uint32 n) +{ + char buf[4096]; + memset(buf, 0, MZ_MIN(sizeof(buf), n)); + while (n) + { + mz_uint32 s = MZ_MIN(sizeof(buf), n); + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_file_ofs, buf, s) != s) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_file_ofs += s; + n -= s; + } + return MZ_TRUE; +} + +mz_bool mz_zip_writer_add_mem_ex(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, + mz_uint64 uncomp_size, mz_uint32 uncomp_crc32) +{ + return mz_zip_writer_add_mem_ex_v2(pZip, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, uncomp_size, uncomp_crc32, NULL, NULL, 0, NULL, 0); +} + +mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, + mz_uint level_and_flags, mz_uint64 uncomp_size, mz_uint32 uncomp_crc32, MZ_TIME_T *last_modified, + const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len) +{ + mz_uint16 method = 0, dos_time = 0, dos_date = 0; + mz_uint level, ext_attributes = 0, num_alignment_padding_bytes; + mz_uint64 local_dir_header_ofs = pZip->m_archive_size, cur_archive_file_ofs = pZip->m_archive_size, comp_size = 0; + size_t archive_name_size; + mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE]; + tdefl_compressor *pComp = NULL; + mz_bool store_data_uncompressed; + mz_zip_internal_state *pState; + mz_uint8 *pExtra_data = NULL; + mz_uint32 extra_size = 0; + mz_uint8 extra_data[MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE]; + mz_uint16 bit_flags = 0; + + if ((int)level_and_flags < 0) + level_and_flags = MZ_DEFAULT_LEVEL; + + if (uncomp_size || (buf_size && !(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA))) + bit_flags |= MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR; + + if (!(level_and_flags & MZ_ZIP_FLAG_ASCII_FILENAME)) + bit_flags |= MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8; + + level = level_and_flags & 0xF; + store_data_uncompressed = ((!level) || (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)); + + if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || ((buf_size) && (!pBuf)) || (!pArchive_name) || ((comment_size) && (!pComment)) || (level > MZ_UBER_COMPRESSION)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + if (pState->m_zip64) + { + if (pZip->m_total_files == MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + else + { + if (pZip->m_total_files == MZ_UINT16_MAX) + { + pState->m_zip64 = MZ_TRUE; + /*return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); */ + } + if ((buf_size > 0xFFFFFFFF) || (uncomp_size > 0xFFFFFFFF)) + { + pState->m_zip64 = MZ_TRUE; + /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */ + } + } + + if ((!(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (uncomp_size)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_writer_validate_archive_name(pArchive_name)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME); + +#ifndef MINIZ_NO_TIME + if (last_modified != NULL) + { + mz_zip_time_t_to_dos_time(*last_modified, &dos_time, &dos_date); + } + else + { + MZ_TIME_T cur_time; + time(&cur_time); + mz_zip_time_t_to_dos_time(cur_time, &dos_time, &dos_date); + } +#endif /* #ifndef MINIZ_NO_TIME */ + + if (!(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) + { + uncomp_crc32 = (mz_uint32)mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, buf_size); + uncomp_size = buf_size; + if (uncomp_size <= 3) + { + level = 0; + store_data_uncompressed = MZ_TRUE; + } + } + + archive_name_size = strlen(pArchive_name); + if (archive_name_size > MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME); + + num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip); + + /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */ + if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE + comment_size) >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + + if (!pState->m_zip64) + { + /* Bail early if the archive would obviously become too large */ + if ((pZip->m_archive_size + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + archive_name_size + + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + comment_size + user_extra_data_len + + pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + user_extra_data_central_len + + MZ_ZIP_DATA_DESCRIPTER_SIZE32) > 0xFFFFFFFF) + { + pState->m_zip64 = MZ_TRUE; + /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */ + } + } + + if ((archive_name_size) && (pArchive_name[archive_name_size - 1] == '/')) + { + /* Set DOS Subdirectory attribute bit. */ + ext_attributes |= MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG; + + /* Subdirectories cannot contain data. */ + if ((buf_size) || (uncomp_size)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + } + + /* Try to do any allocations before writing to the archive, so if an allocation fails the file remains unmodified. (A good idea if we're doing an in-place modification.) */ + if ((!mz_zip_array_ensure_room(pZip, &pState->m_central_dir, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + comment_size + (pState->m_zip64 ? MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE : 0))) || (!mz_zip_array_ensure_room(pZip, &pState->m_central_dir_offsets, 1))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + if ((!store_data_uncompressed) && (buf_size)) + { + if (NULL == (pComp = (tdefl_compressor *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(tdefl_compressor)))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + return MZ_FALSE; + } + + local_dir_header_ofs += num_alignment_padding_bytes; + if (pZip->m_file_offset_alignment) + { + MZ_ASSERT((local_dir_header_ofs & (pZip->m_file_offset_alignment - 1)) == 0); + } + cur_archive_file_ofs += num_alignment_padding_bytes; + + MZ_CLEAR_OBJ(local_dir_header); + + if (!store_data_uncompressed || (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) + { + method = MZ_DEFLATED; + } + + if (pState->m_zip64) + { + if (uncomp_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX) + { + pExtra_data = extra_data; + extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL, + (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL); + } + + if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len), 0, 0, 0, method, bit_flags, dos_time, dos_date)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, local_dir_header_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += sizeof(local_dir_header); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + cur_archive_file_ofs += archive_name_size; + + if (pExtra_data != NULL) + { + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, extra_data, extra_size) != extra_size) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += extra_size; + } + } + else + { + if ((comp_size > MZ_UINT32_MAX) || (cur_archive_file_ofs > MZ_UINT32_MAX)) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)user_extra_data_len, 0, 0, 0, method, bit_flags, dos_time, dos_date)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, local_dir_header_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += sizeof(local_dir_header); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + cur_archive_file_ofs += archive_name_size; + } + + if (user_extra_data_len > 0) + { + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, user_extra_data, user_extra_data_len) != user_extra_data_len) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += user_extra_data_len; + } + + if (store_data_uncompressed) + { + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pBuf, buf_size) != buf_size) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + + cur_archive_file_ofs += buf_size; + comp_size = buf_size; + } + else if (buf_size) + { + mz_zip_writer_add_state state; + + state.m_pZip = pZip; + state.m_cur_archive_file_ofs = cur_archive_file_ofs; + state.m_comp_size = 0; + + if ((tdefl_init(pComp, mz_zip_writer_add_put_buf_callback, &state, tdefl_create_comp_flags_from_zip_params(level, -15, MZ_DEFAULT_STRATEGY)) != TDEFL_STATUS_OKAY) || + (tdefl_compress_buffer(pComp, pBuf, buf_size, TDEFL_FINISH) != TDEFL_STATUS_DONE)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + return mz_zip_set_error(pZip, MZ_ZIP_COMPRESSION_FAILED); + } + + comp_size = state.m_comp_size; + cur_archive_file_ofs = state.m_cur_archive_file_ofs; + } + + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + pComp = NULL; + + if (uncomp_size) + { + mz_uint8 local_dir_footer[MZ_ZIP_DATA_DESCRIPTER_SIZE64]; + mz_uint32 local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE32; + + MZ_ASSERT(bit_flags & MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR); + + MZ_WRITE_LE32(local_dir_footer + 0, MZ_ZIP_DATA_DESCRIPTOR_ID); + MZ_WRITE_LE32(local_dir_footer + 4, uncomp_crc32); + if (pExtra_data == NULL) + { + if (comp_size > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + MZ_WRITE_LE32(local_dir_footer + 8, comp_size); + MZ_WRITE_LE32(local_dir_footer + 12, uncomp_size); + } + else + { + MZ_WRITE_LE64(local_dir_footer + 8, comp_size); + MZ_WRITE_LE64(local_dir_footer + 16, uncomp_size); + local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE64; + } + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_footer, local_dir_footer_size) != local_dir_footer_size) + return MZ_FALSE; + + cur_archive_file_ofs += local_dir_footer_size; + } + + if (pExtra_data != NULL) + { + extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL, + (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL); + } + + if (!mz_zip_writer_add_to_central_dir(pZip, pArchive_name, (mz_uint16)archive_name_size, pExtra_data, (mz_uint16)extra_size, pComment, + comment_size, uncomp_size, comp_size, uncomp_crc32, method, bit_flags, dos_time, dos_date, local_dir_header_ofs, ext_attributes, + user_extra_data_central, user_extra_data_central_len)) + return MZ_FALSE; + + pZip->m_total_files++; + pZip->m_archive_size = cur_archive_file_ofs; + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pArchive_name, mz_file_read_func read_callback, void* callback_opaque, mz_uint64 size_to_add, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, + const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len) +{ + mz_uint16 gen_flags = MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR; + mz_uint uncomp_crc32 = MZ_CRC32_INIT, level, num_alignment_padding_bytes; + mz_uint16 method = 0, dos_time = 0, dos_date = 0, ext_attributes = 0; + mz_uint64 local_dir_header_ofs, cur_archive_file_ofs = pZip->m_archive_size, uncomp_size = size_to_add, comp_size = 0; + size_t archive_name_size; + mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE]; + mz_uint8 *pExtra_data = NULL; + mz_uint32 extra_size = 0; + mz_uint8 extra_data[MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE]; + mz_zip_internal_state *pState; + mz_uint64 file_ofs = 0; + + if (!(level_and_flags & MZ_ZIP_FLAG_ASCII_FILENAME)) + gen_flags |= MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8; + + if ((int)level_and_flags < 0) + level_and_flags = MZ_DEFAULT_LEVEL; + level = level_and_flags & 0xF; + + /* Sanity checks */ + if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || (!pArchive_name) || ((comment_size) && (!pComment)) || (level > MZ_UBER_COMPRESSION)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + if ((!pState->m_zip64) && (uncomp_size > MZ_UINT32_MAX)) + { + /* Source file is too large for non-zip64 */ + /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */ + pState->m_zip64 = MZ_TRUE; + } + + /* We could support this, but why? */ + if (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_writer_validate_archive_name(pArchive_name)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME); + + if (pState->m_zip64) + { + if (pZip->m_total_files == MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + else + { + if (pZip->m_total_files == MZ_UINT16_MAX) + { + pState->m_zip64 = MZ_TRUE; + /*return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); */ + } + } + + archive_name_size = strlen(pArchive_name); + if (archive_name_size > MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME); + + num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip); + + /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */ + if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE + comment_size) >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + + if (!pState->m_zip64) + { + /* Bail early if the archive would obviously become too large */ + if ((pZip->m_archive_size + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + + archive_name_size + comment_size + user_extra_data_len + pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + 1024 + + MZ_ZIP_DATA_DESCRIPTER_SIZE32 + user_extra_data_central_len) > 0xFFFFFFFF) + { + pState->m_zip64 = MZ_TRUE; + /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */ + } + } + +#ifndef MINIZ_NO_TIME + if (pFile_time) + { + mz_zip_time_t_to_dos_time(*pFile_time, &dos_time, &dos_date); + } +#endif + + if (uncomp_size <= 3) + level = 0; + + if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes)) + { + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + + cur_archive_file_ofs += num_alignment_padding_bytes; + local_dir_header_ofs = cur_archive_file_ofs; + + if (pZip->m_file_offset_alignment) + { + MZ_ASSERT((cur_archive_file_ofs & (pZip->m_file_offset_alignment - 1)) == 0); + } + + if (uncomp_size && level) + { + method = MZ_DEFLATED; + } + + MZ_CLEAR_OBJ(local_dir_header); + if (pState->m_zip64) + { + if (uncomp_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX) + { + pExtra_data = extra_data; + extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL, + (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL); + } + + if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len), 0, 0, 0, method, gen_flags, dos_time, dos_date)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += sizeof(local_dir_header); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size) + { + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + + cur_archive_file_ofs += archive_name_size; + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, extra_data, extra_size) != extra_size) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += extra_size; + } + else + { + if ((comp_size > MZ_UINT32_MAX) || (cur_archive_file_ofs > MZ_UINT32_MAX)) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)user_extra_data_len, 0, 0, 0, method, gen_flags, dos_time, dos_date)) + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += sizeof(local_dir_header); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size) + { + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + + cur_archive_file_ofs += archive_name_size; + } + + if (user_extra_data_len > 0) + { + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, user_extra_data, user_extra_data_len) != user_extra_data_len) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_archive_file_ofs += user_extra_data_len; + } + + if (uncomp_size) + { + mz_uint64 uncomp_remaining = uncomp_size; + void *pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, MZ_ZIP_MAX_IO_BUF_SIZE); + if (!pRead_buf) + { + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (!level) + { + while (uncomp_remaining) + { + mz_uint n = (mz_uint)MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, uncomp_remaining); + if ((read_callback(callback_opaque, file_ofs, pRead_buf, n) != n) || (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pRead_buf, n) != n)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + file_ofs += n; + uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n); + uncomp_remaining -= n; + cur_archive_file_ofs += n; + } + comp_size = uncomp_size; + } + else + { + mz_bool result = MZ_FALSE; + mz_zip_writer_add_state state; + tdefl_compressor *pComp = (tdefl_compressor *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(tdefl_compressor)); + if (!pComp) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + state.m_pZip = pZip; + state.m_cur_archive_file_ofs = cur_archive_file_ofs; + state.m_comp_size = 0; + + if (tdefl_init(pComp, mz_zip_writer_add_put_buf_callback, &state, tdefl_create_comp_flags_from_zip_params(level, -15, MZ_DEFAULT_STRATEGY)) != TDEFL_STATUS_OKAY) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR); + } + + for (;;) + { + size_t in_buf_size = (mz_uint32)MZ_MIN(uncomp_remaining, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE); + tdefl_status status; + tdefl_flush flush = TDEFL_NO_FLUSH; + + if (read_callback(callback_opaque, file_ofs, pRead_buf, in_buf_size)!= in_buf_size) + { + mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + break; + } + + file_ofs += in_buf_size; + uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, in_buf_size); + uncomp_remaining -= in_buf_size; + + if (pZip->m_pNeeds_keepalive != NULL && pZip->m_pNeeds_keepalive(pZip->m_pIO_opaque)) + flush = TDEFL_FULL_FLUSH; + + status = tdefl_compress_buffer(pComp, pRead_buf, in_buf_size, uncomp_remaining ? flush : TDEFL_FINISH); + if (status == TDEFL_STATUS_DONE) + { + result = MZ_TRUE; + break; + } + else if (status != TDEFL_STATUS_OKAY) + { + mz_zip_set_error(pZip, MZ_ZIP_COMPRESSION_FAILED); + break; + } + } + + pZip->m_pFree(pZip->m_pAlloc_opaque, pComp); + + if (!result) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + return MZ_FALSE; + } + + comp_size = state.m_comp_size; + cur_archive_file_ofs = state.m_cur_archive_file_ofs; + } + + pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); + } + + { + mz_uint8 local_dir_footer[MZ_ZIP_DATA_DESCRIPTER_SIZE64]; + mz_uint32 local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE32; + + MZ_WRITE_LE32(local_dir_footer + 0, MZ_ZIP_DATA_DESCRIPTOR_ID); + MZ_WRITE_LE32(local_dir_footer + 4, uncomp_crc32); + if (pExtra_data == NULL) + { + if (comp_size > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + MZ_WRITE_LE32(local_dir_footer + 8, comp_size); + MZ_WRITE_LE32(local_dir_footer + 12, uncomp_size); + } + else + { + MZ_WRITE_LE64(local_dir_footer + 8, comp_size); + MZ_WRITE_LE64(local_dir_footer + 16, uncomp_size); + local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE64; + } + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_footer, local_dir_footer_size) != local_dir_footer_size) + return MZ_FALSE; + + cur_archive_file_ofs += local_dir_footer_size; + } + + if (pExtra_data != NULL) + { + extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL, + (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL); + } + + if (!mz_zip_writer_add_to_central_dir(pZip, pArchive_name, (mz_uint16)archive_name_size, pExtra_data, (mz_uint16)extra_size, pComment, comment_size, + uncomp_size, comp_size, uncomp_crc32, method, gen_flags, dos_time, dos_date, local_dir_header_ofs, ext_attributes, + user_extra_data_central, user_extra_data_central_len)) + return MZ_FALSE; + + pZip->m_total_files++; + pZip->m_archive_size = cur_archive_file_ofs; + + return MZ_TRUE; +} + +#ifndef MINIZ_NO_STDIO + +static size_t mz_file_read_func_stdio(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n) +{ + MZ_FILE *pSrc_file = (MZ_FILE *)pOpaque; + mz_int64 cur_ofs = MZ_FTELL64(pSrc_file); + + if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pSrc_file, (mz_int64)file_ofs, SEEK_SET)))) + return 0; + + return MZ_FREAD(pBuf, 1, n, pSrc_file); +} + +mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, mz_uint64 size_to_add, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, + const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len) +{ + return mz_zip_writer_add_read_buf_callback(pZip, pArchive_name, mz_file_read_func_stdio, pSrc_file, size_to_add, pFile_time, pComment, comment_size, level_and_flags, + user_extra_data, user_extra_data_len, user_extra_data_central, user_extra_data_central_len); +} + +mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags) +{ + MZ_FILE *pSrc_file = NULL; + mz_uint64 uncomp_size = 0; + MZ_TIME_T file_modified_time; + MZ_TIME_T *pFile_time = NULL; + mz_bool status; + + memset(&file_modified_time, 0, sizeof(file_modified_time)); + +#if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_STDIO) + pFile_time = &file_modified_time; + if (!mz_zip_get_file_modified_time(pSrc_filename, &file_modified_time)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_STAT_FAILED); +#endif + + pSrc_file = MZ_FOPEN(pSrc_filename, "rb"); + if (!pSrc_file) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED); + + MZ_FSEEK64(pSrc_file, 0, SEEK_END); + uncomp_size = MZ_FTELL64(pSrc_file); + MZ_FSEEK64(pSrc_file, 0, SEEK_SET); + + status = mz_zip_writer_add_cfile(pZip, pArchive_name, pSrc_file, uncomp_size, pFile_time, pComment, comment_size, level_and_flags, NULL, 0, NULL, 0); + + MZ_FCLOSE(pSrc_file); + + return status; +} +#endif /* #ifndef MINIZ_NO_STDIO */ + +static mz_bool mz_zip_writer_update_zip64_extension_block(mz_zip_array *pNew_ext, mz_zip_archive *pZip, const mz_uint8 *pExt, uint32_t ext_len, mz_uint64 *pComp_size, mz_uint64 *pUncomp_size, mz_uint64 *pLocal_header_ofs, mz_uint32 *pDisk_start) +{ + /* + 64 should be enough for any new zip64 data */ + if (!mz_zip_array_reserve(pZip, pNew_ext, ext_len + 64, MZ_FALSE)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + mz_zip_array_resize(pZip, pNew_ext, 0, MZ_FALSE); + + if ((pUncomp_size) || (pComp_size) || (pLocal_header_ofs) || (pDisk_start)) + { + mz_uint8 new_ext_block[64]; + mz_uint8 *pDst = new_ext_block; + mz_write_le16(pDst, MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID); + mz_write_le16(pDst + sizeof(mz_uint16), 0); + pDst += sizeof(mz_uint16) * 2; + + if (pUncomp_size) + { + mz_write_le64(pDst, *pUncomp_size); + pDst += sizeof(mz_uint64); + } + + if (pComp_size) + { + mz_write_le64(pDst, *pComp_size); + pDst += sizeof(mz_uint64); + } + + if (pLocal_header_ofs) + { + mz_write_le64(pDst, *pLocal_header_ofs); + pDst += sizeof(mz_uint64); + } + + if (pDisk_start) + { + mz_write_le32(pDst, *pDisk_start); + pDst += sizeof(mz_uint32); + } + + mz_write_le16(new_ext_block + sizeof(mz_uint16), (mz_uint16)((pDst - new_ext_block) - sizeof(mz_uint16) * 2)); + + if (!mz_zip_array_push_back(pZip, pNew_ext, new_ext_block, pDst - new_ext_block)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if ((pExt) && (ext_len)) + { + mz_uint32 extra_size_remaining = ext_len; + const mz_uint8 *pExtra_data = pExt; + + do + { + mz_uint32 field_id, field_data_size, field_total_size; + + if (extra_size_remaining < (sizeof(mz_uint16) * 2)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + field_id = MZ_READ_LE16(pExtra_data); + field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16)); + field_total_size = field_data_size + sizeof(mz_uint16) * 2; + + if (field_total_size > extra_size_remaining) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + if (field_id != MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) + { + if (!mz_zip_array_push_back(pZip, pNew_ext, pExtra_data, field_total_size)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + pExtra_data += field_total_size; + extra_size_remaining -= field_total_size; + } while (extra_size_remaining); + } + + return MZ_TRUE; +} + +/* TODO: This func is now pretty freakin complex due to zip64, split it up? */ +mz_bool mz_zip_writer_add_from_zip_reader(mz_zip_archive *pZip, mz_zip_archive *pSource_zip, mz_uint src_file_index) +{ + mz_uint n, bit_flags, num_alignment_padding_bytes, src_central_dir_following_data_size; + mz_uint64 src_archive_bytes_remaining, local_dir_header_ofs; + mz_uint64 cur_src_file_ofs, cur_dst_file_ofs; + mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)]; + mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32; + mz_uint8 new_central_header[MZ_ZIP_CENTRAL_DIR_HEADER_SIZE]; + size_t orig_central_dir_size; + mz_zip_internal_state *pState; + void *pBuf; + const mz_uint8 *pSrc_central_header; + mz_zip_archive_file_stat src_file_stat; + mz_uint32 src_filename_len, src_comment_len, src_ext_len; + mz_uint32 local_header_filename_size, local_header_extra_len; + mz_uint64 local_header_comp_size, local_header_uncomp_size; + mz_bool found_zip64_ext_data_in_ldir = MZ_FALSE; + + /* Sanity checks */ + if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || (!pSource_zip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + /* Don't support copying files from zip64 archives to non-zip64, even though in some cases this is possible */ + if ((pSource_zip->m_pState->m_zip64) && (!pZip->m_pState->m_zip64)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + /* Get pointer to the source central dir header and crack it */ + if (NULL == (pSrc_central_header = mz_zip_get_cdh(pSource_zip, src_file_index))) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (MZ_READ_LE32(pSrc_central_header + MZ_ZIP_CDH_SIG_OFS) != MZ_ZIP_CENTRAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + src_filename_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_FILENAME_LEN_OFS); + src_comment_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_COMMENT_LEN_OFS); + src_ext_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_EXTRA_LEN_OFS); + src_central_dir_following_data_size = src_filename_len + src_ext_len + src_comment_len; + + /* TODO: We don't support central dir's >= MZ_UINT32_MAX bytes right now (+32 fudge factor in case we need to add more extra data) */ + if ((pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_central_dir_following_data_size + 32) >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + + num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip); + + if (!pState->m_zip64) + { + if (pZip->m_total_files == MZ_UINT16_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + else + { + /* TODO: Our zip64 support still has some 32-bit limits that may not be worth fixing. */ + if (pZip->m_total_files == MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + + if (!mz_zip_file_stat_internal(pSource_zip, src_file_index, pSrc_central_header, &src_file_stat, NULL)) + return MZ_FALSE; + + cur_src_file_ofs = src_file_stat.m_local_header_ofs; + cur_dst_file_ofs = pZip->m_archive_size; + + /* Read the source archive's local dir header */ + if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + + if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + + cur_src_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE; + + /* Compute the total size we need to copy (filename+extra data+compressed data) */ + local_header_filename_size = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS); + local_header_extra_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS); + local_header_comp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS); + local_header_uncomp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS); + src_archive_bytes_remaining = local_header_filename_size + local_header_extra_len + src_file_stat.m_comp_size; + + /* Try to find a zip64 extended information field */ + if ((local_header_extra_len) && ((local_header_comp_size == MZ_UINT32_MAX) || (local_header_uncomp_size == MZ_UINT32_MAX))) + { + mz_zip_array file_data_array; + const mz_uint8 *pExtra_data; + mz_uint32 extra_size_remaining = local_header_extra_len; + + mz_zip_array_init(&file_data_array, 1); + if (!mz_zip_array_resize(pZip, &file_data_array, local_header_extra_len, MZ_FALSE)) + { + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, src_file_stat.m_local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_size, file_data_array.m_p, local_header_extra_len) != local_header_extra_len) + { + mz_zip_array_clear(pZip, &file_data_array); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + + pExtra_data = (const mz_uint8 *)file_data_array.m_p; + + do + { + mz_uint32 field_id, field_data_size, field_total_size; + + if (extra_size_remaining < (sizeof(mz_uint16) * 2)) + { + mz_zip_array_clear(pZip, &file_data_array); + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + field_id = MZ_READ_LE16(pExtra_data); + field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16)); + field_total_size = field_data_size + sizeof(mz_uint16) * 2; + + if (field_total_size > extra_size_remaining) + { + mz_zip_array_clear(pZip, &file_data_array); + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID) + { + const mz_uint8 *pSrc_field_data = pExtra_data + sizeof(mz_uint32); + + if (field_data_size < sizeof(mz_uint64) * 2) + { + mz_zip_array_clear(pZip, &file_data_array); + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED); + } + + local_header_uncomp_size = MZ_READ_LE64(pSrc_field_data); + local_header_comp_size = MZ_READ_LE64(pSrc_field_data + sizeof(mz_uint64)); /* may be 0 if there's a descriptor */ + + found_zip64_ext_data_in_ldir = MZ_TRUE; + break; + } + + pExtra_data += field_total_size; + extra_size_remaining -= field_total_size; + } while (extra_size_remaining); + + mz_zip_array_clear(pZip, &file_data_array); + } + + if (!pState->m_zip64) + { + /* Try to detect if the new archive will most likely wind up too big and bail early (+(sizeof(mz_uint32) * 4) is for the optional descriptor which could be present, +64 is a fudge factor). */ + /* We also check when the archive is finalized so this doesn't need to be perfect. */ + mz_uint64 approx_new_archive_size = cur_dst_file_ofs + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + src_archive_bytes_remaining + (sizeof(mz_uint32) * 4) + + pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_central_dir_following_data_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + 64; + + if (approx_new_archive_size >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + } + + /* Write dest archive padding */ + if (!mz_zip_writer_write_zeros(pZip, cur_dst_file_ofs, num_alignment_padding_bytes)) + return MZ_FALSE; + + cur_dst_file_ofs += num_alignment_padding_bytes; + + local_dir_header_ofs = cur_dst_file_ofs; + if (pZip->m_file_offset_alignment) + { + MZ_ASSERT((local_dir_header_ofs & (pZip->m_file_offset_alignment - 1)) == 0); + } + + /* The original zip's local header+ext block doesn't change, even with zip64, so we can just copy it over to the dest zip */ + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + cur_dst_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE; + + /* Copy over the source archive bytes to the dest archive, also ensure we have enough buf space to handle optional data descriptor */ + if (NULL == (pBuf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)MZ_MAX(32U, MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, src_archive_bytes_remaining))))) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + while (src_archive_bytes_remaining) + { + n = (mz_uint)MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, src_archive_bytes_remaining); + if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, n) != n) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + cur_src_file_ofs += n; + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pBuf, n) != n) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + cur_dst_file_ofs += n; + + src_archive_bytes_remaining -= n; + } + + /* Now deal with the optional data descriptor */ + bit_flags = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_BIT_FLAG_OFS); + if (bit_flags & 8) + { + /* Copy data descriptor */ + if ((pSource_zip->m_pState->m_zip64) || (found_zip64_ext_data_in_ldir)) + { + /* src is zip64, dest must be zip64 */ + + /* name uint32_t's */ + /* id 1 (optional in zip64?) */ + /* crc 1 */ + /* comp_size 2 */ + /* uncomp_size 2 */ + if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, (sizeof(mz_uint32) * 6)) != (sizeof(mz_uint32) * 6)) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + + n = sizeof(mz_uint32) * ((MZ_READ_LE32(pBuf) == MZ_ZIP_DATA_DESCRIPTOR_ID) ? 6 : 5); + } + else + { + /* src is NOT zip64 */ + mz_bool has_id; + + if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, sizeof(mz_uint32) * 4) != sizeof(mz_uint32) * 4) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); + } + + has_id = (MZ_READ_LE32(pBuf) == MZ_ZIP_DATA_DESCRIPTOR_ID); + + if (pZip->m_pState->m_zip64) + { + /* dest is zip64, so upgrade the data descriptor */ + const mz_uint32 *pSrc_descriptor = (const mz_uint32 *)((const mz_uint8 *)pBuf + (has_id ? sizeof(mz_uint32) : 0)); + const mz_uint32 src_crc32 = pSrc_descriptor[0]; + const mz_uint64 src_comp_size = pSrc_descriptor[1]; + const mz_uint64 src_uncomp_size = pSrc_descriptor[2]; + + mz_write_le32((mz_uint8 *)pBuf, MZ_ZIP_DATA_DESCRIPTOR_ID); + mz_write_le32((mz_uint8 *)pBuf + sizeof(mz_uint32) * 1, src_crc32); + mz_write_le64((mz_uint8 *)pBuf + sizeof(mz_uint32) * 2, src_comp_size); + mz_write_le64((mz_uint8 *)pBuf + sizeof(mz_uint32) * 4, src_uncomp_size); + + n = sizeof(mz_uint32) * 6; + } + else + { + /* dest is NOT zip64, just copy it as-is */ + n = sizeof(mz_uint32) * (has_id ? 4 : 3); + } + } + + if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pBuf, n) != n) + { + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + } + + cur_src_file_ofs += n; + cur_dst_file_ofs += n; + } + pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf); + + /* Finally, add the new central dir header */ + orig_central_dir_size = pState->m_central_dir.m_size; + + memcpy(new_central_header, pSrc_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE); + + if (pState->m_zip64) + { + /* This is the painful part: We need to write a new central dir header + ext block with updated zip64 fields, and ensure the old fields (if any) are not included. */ + const mz_uint8 *pSrc_ext = pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_filename_len; + mz_zip_array new_ext_block; + + mz_zip_array_init(&new_ext_block, sizeof(mz_uint8)); + + MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS, MZ_UINT32_MAX); + MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS, MZ_UINT32_MAX); + MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_LOCAL_HEADER_OFS, MZ_UINT32_MAX); + + if (!mz_zip_writer_update_zip64_extension_block(&new_ext_block, pZip, pSrc_ext, src_ext_len, &src_file_stat.m_comp_size, &src_file_stat.m_uncomp_size, &local_dir_header_ofs, NULL)) + { + mz_zip_array_clear(pZip, &new_ext_block); + return MZ_FALSE; + } + + MZ_WRITE_LE16(new_central_header + MZ_ZIP_CDH_EXTRA_LEN_OFS, new_ext_block.m_size); + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)) + { + mz_zip_array_clear(pZip, &new_ext_block); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, src_filename_len)) + { + mz_zip_array_clear(pZip, &new_ext_block); + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_ext_block.m_p, new_ext_block.m_size)) + { + mz_zip_array_clear(pZip, &new_ext_block); + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_filename_len + src_ext_len, src_comment_len)) + { + mz_zip_array_clear(pZip, &new_ext_block); + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + mz_zip_array_clear(pZip, &new_ext_block); + } + else + { + /* sanity checks */ + if (cur_dst_file_ofs > MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + if (local_dir_header_ofs >= MZ_UINT32_MAX) + return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); + + MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_LOCAL_HEADER_OFS, local_dir_header_ofs); + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)) + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, src_central_dir_following_data_size)) + { + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + } + + /* This shouldn't trigger unless we screwed up during the initial sanity checks */ + if (pState->m_central_dir.m_size >= MZ_UINT32_MAX) + { + /* TODO: Support central dirs >= 32-bits in size */ + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE); + } + + n = (mz_uint32)orig_central_dir_size; + if (!mz_zip_array_push_back(pZip, &pState->m_central_dir_offsets, &n, 1)) + { + mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE); + return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED); + } + + pZip->m_total_files++; + pZip->m_archive_size = cur_dst_file_ofs; + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_finalize_archive(mz_zip_archive *pZip) +{ + mz_zip_internal_state *pState; + mz_uint64 central_dir_ofs, central_dir_size; + mz_uint8 hdr[256]; + + if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + pState = pZip->m_pState; + + if (pState->m_zip64) + { + if ((pZip->m_total_files > MZ_UINT32_MAX) || (pState->m_central_dir.m_size >= MZ_UINT32_MAX)) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + else + { + if ((pZip->m_total_files > MZ_UINT16_MAX) || ((pZip->m_archive_size + pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) > MZ_UINT32_MAX)) + return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); + } + + central_dir_ofs = 0; + central_dir_size = 0; + if (pZip->m_total_files) + { + /* Write central directory */ + central_dir_ofs = pZip->m_archive_size; + central_dir_size = pState->m_central_dir.m_size; + pZip->m_central_directory_file_ofs = central_dir_ofs; + if (pZip->m_pWrite(pZip->m_pIO_opaque, central_dir_ofs, pState->m_central_dir.m_p, (size_t)central_dir_size) != central_dir_size) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + pZip->m_archive_size += central_dir_size; + } + + if (pState->m_zip64) + { + /* Write zip64 end of central directory header */ + mz_uint64 rel_ofs_to_zip64_ecdr = pZip->m_archive_size; + + MZ_CLEAR_OBJ(hdr); + MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDH_SIG_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE - sizeof(mz_uint32) - sizeof(mz_uint64)); + MZ_WRITE_LE16(hdr + MZ_ZIP64_ECDH_VERSION_MADE_BY_OFS, 0x031E); /* TODO: always Unix */ + MZ_WRITE_LE16(hdr + MZ_ZIP64_ECDH_VERSION_NEEDED_OFS, 0x002D); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS, pZip->m_total_files); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS, pZip->m_total_files); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_SIZE_OFS, central_dir_size); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_OFS_OFS, central_dir_ofs); + if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + pZip->m_archive_size += MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE; + + /* Write zip64 end of central directory locator */ + MZ_CLEAR_OBJ(hdr); + MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDL_SIG_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG); + MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS, rel_ofs_to_zip64_ecdr); + MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS, 1); + if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) != MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + + pZip->m_archive_size += MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE; + } + + /* Write end of central directory record */ + MZ_CLEAR_OBJ(hdr); + MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_SIG_OFS, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG); + MZ_WRITE_LE16(hdr + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS, MZ_MIN(MZ_UINT16_MAX, pZip->m_total_files)); + MZ_WRITE_LE16(hdr + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS, MZ_MIN(MZ_UINT16_MAX, pZip->m_total_files)); + MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_CDIR_SIZE_OFS, MZ_MIN(MZ_UINT32_MAX, central_dir_size)); + MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_CDIR_OFS_OFS, MZ_MIN(MZ_UINT32_MAX, central_dir_ofs)); + + if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED); + +#ifndef MINIZ_NO_STDIO + if ((pState->m_pFile) && (MZ_FFLUSH(pState->m_pFile) == EOF)) + return mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED); +#endif /* #ifndef MINIZ_NO_STDIO */ + + pZip->m_archive_size += MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE; + + pZip->m_zip_mode = MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED; + return MZ_TRUE; +} + +mz_bool mz_zip_writer_finalize_heap_archive(mz_zip_archive *pZip, void **ppBuf, size_t *pSize) +{ + if ((!ppBuf) || (!pSize)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + *ppBuf = NULL; + *pSize = 0; + + if ((!pZip) || (!pZip->m_pState)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (pZip->m_pWrite != mz_zip_heap_write_func) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + if (!mz_zip_writer_finalize_archive(pZip)) + return MZ_FALSE; + + *ppBuf = pZip->m_pState->m_pMem; + *pSize = pZip->m_pState->m_mem_size; + pZip->m_pState->m_pMem = NULL; + pZip->m_pState->m_mem_size = pZip->m_pState->m_mem_capacity = 0; + + return MZ_TRUE; +} + +mz_bool mz_zip_writer_end(mz_zip_archive *pZip) +{ + return mz_zip_writer_end_internal(pZip, MZ_TRUE); +} + +#ifndef MINIZ_NO_STDIO +mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags) +{ + return mz_zip_add_mem_to_archive_file_in_place_v2(pZip_filename, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, NULL); +} + +mz_bool mz_zip_add_mem_to_archive_file_in_place_v2(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, mz_zip_error *pErr) +{ + mz_bool status, created_new_archive = MZ_FALSE; + mz_zip_archive zip_archive; + struct MZ_FILE_STAT_STRUCT file_stat; + mz_zip_error actual_err = MZ_ZIP_NO_ERROR; + + mz_zip_zero_struct(&zip_archive); + if ((int)level_and_flags < 0) + level_and_flags = MZ_DEFAULT_LEVEL; + + if ((!pZip_filename) || (!pArchive_name) || ((buf_size) && (!pBuf)) || ((comment_size) && (!pComment)) || ((level_and_flags & 0xF) > MZ_UBER_COMPRESSION)) + { + if (pErr) + *pErr = MZ_ZIP_INVALID_PARAMETER; + return MZ_FALSE; + } + + if (!mz_zip_writer_validate_archive_name(pArchive_name)) + { + if (pErr) + *pErr = MZ_ZIP_INVALID_FILENAME; + return MZ_FALSE; + } + + /* Important: The regular non-64 bit version of stat() can fail here if the file is very large, which could cause the archive to be overwritten. */ + /* So be sure to compile with _LARGEFILE64_SOURCE 1 */ + if (MZ_FILE_STAT(pZip_filename, &file_stat) != 0) + { + /* Create a new archive. */ + if (!mz_zip_writer_init_file_v2(&zip_archive, pZip_filename, 0, level_and_flags)) + { + if (pErr) + *pErr = zip_archive.m_last_error; + return MZ_FALSE; + } + + created_new_archive = MZ_TRUE; + } + else + { + /* Append to an existing archive. */ + if (!mz_zip_reader_init_file_v2(&zip_archive, pZip_filename, level_and_flags | MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY, 0, 0)) + { + if (pErr) + *pErr = zip_archive.m_last_error; + return MZ_FALSE; + } + + if (!mz_zip_writer_init_from_reader_v2(&zip_archive, pZip_filename, level_and_flags)) + { + if (pErr) + *pErr = zip_archive.m_last_error; + + mz_zip_reader_end_internal(&zip_archive, MZ_FALSE); + + return MZ_FALSE; + } + } + + status = mz_zip_writer_add_mem_ex(&zip_archive, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, 0, 0); + actual_err = zip_archive.m_last_error; + + /* Always finalize, even if adding failed for some reason, so we have a valid central directory. (This may not always succeed, but we can try.) */ + if (!mz_zip_writer_finalize_archive(&zip_archive)) + { + if (!actual_err) + actual_err = zip_archive.m_last_error; + + status = MZ_FALSE; + } + + if (!mz_zip_writer_end_internal(&zip_archive, status)) + { + if (!actual_err) + actual_err = zip_archive.m_last_error; + + status = MZ_FALSE; + } + + if ((!status) && (created_new_archive)) + { + /* It's a new archive and something went wrong, so just delete it. */ + int ignoredStatus = MZ_DELETE_FILE(pZip_filename); + (void)ignoredStatus; + } + + if (pErr) + *pErr = actual_err; + + return status; +} + +void *mz_zip_extract_archive_file_to_heap_v2(const char *pZip_filename, const char *pArchive_name, const char *pComment, size_t *pSize, mz_uint flags, mz_zip_error *pErr) +{ + mz_uint32 file_index; + mz_zip_archive zip_archive; + void *p = NULL; + + if (pSize) + *pSize = 0; + + if ((!pZip_filename) || (!pArchive_name)) + { + if (pErr) + *pErr = MZ_ZIP_INVALID_PARAMETER; + + return NULL; + } + + mz_zip_zero_struct(&zip_archive); + if (!mz_zip_reader_init_file_v2(&zip_archive, pZip_filename, flags | MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY, 0, 0)) + { + if (pErr) + *pErr = zip_archive.m_last_error; + + return NULL; + } + + if (mz_zip_reader_locate_file_v2(&zip_archive, pArchive_name, pComment, flags, &file_index)) + { + p = mz_zip_reader_extract_to_heap(&zip_archive, file_index, pSize, flags); + } + + mz_zip_reader_end_internal(&zip_archive, p != NULL); + + if (pErr) + *pErr = zip_archive.m_last_error; + + return p; +} + +void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, size_t *pSize, mz_uint flags) +{ + return mz_zip_extract_archive_file_to_heap_v2(pZip_filename, pArchive_name, NULL, pSize, flags, NULL); +} + +#endif /* #ifndef MINIZ_NO_STDIO */ + +#endif /* #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS */ + +/* ------------------- Misc utils */ + +mz_zip_mode mz_zip_get_mode(mz_zip_archive *pZip) +{ + return pZip ? pZip->m_zip_mode : MZ_ZIP_MODE_INVALID; +} + +mz_zip_type mz_zip_get_type(mz_zip_archive *pZip) +{ + return pZip ? pZip->m_zip_type : MZ_ZIP_TYPE_INVALID; +} + +mz_zip_error mz_zip_set_last_error(mz_zip_archive *pZip, mz_zip_error err_num) +{ + mz_zip_error prev_err; + + if (!pZip) + return MZ_ZIP_INVALID_PARAMETER; + + prev_err = pZip->m_last_error; + + pZip->m_last_error = err_num; + return prev_err; +} + +mz_zip_error mz_zip_peek_last_error(mz_zip_archive *pZip) +{ + if (!pZip) + return MZ_ZIP_INVALID_PARAMETER; + + return pZip->m_last_error; +} + +mz_zip_error mz_zip_clear_last_error(mz_zip_archive *pZip) +{ + return mz_zip_set_last_error(pZip, MZ_ZIP_NO_ERROR); +} + +mz_zip_error mz_zip_get_last_error(mz_zip_archive *pZip) +{ + mz_zip_error prev_err; + + if (!pZip) + return MZ_ZIP_INVALID_PARAMETER; + + prev_err = pZip->m_last_error; + + pZip->m_last_error = MZ_ZIP_NO_ERROR; + return prev_err; +} + +const char *mz_zip_get_error_string(mz_zip_error mz_err) +{ + switch (mz_err) + { + case MZ_ZIP_NO_ERROR: + return "no error"; + case MZ_ZIP_UNDEFINED_ERROR: + return "undefined error"; + case MZ_ZIP_TOO_MANY_FILES: + return "too many files"; + case MZ_ZIP_FILE_TOO_LARGE: + return "file too large"; + case MZ_ZIP_UNSUPPORTED_METHOD: + return "unsupported method"; + case MZ_ZIP_UNSUPPORTED_ENCRYPTION: + return "unsupported encryption"; + case MZ_ZIP_UNSUPPORTED_FEATURE: + return "unsupported feature"; + case MZ_ZIP_FAILED_FINDING_CENTRAL_DIR: + return "failed finding central directory"; + case MZ_ZIP_NOT_AN_ARCHIVE: + return "not a ZIP archive"; + case MZ_ZIP_INVALID_HEADER_OR_CORRUPTED: + return "invalid header or archive is corrupted"; + case MZ_ZIP_UNSUPPORTED_MULTIDISK: + return "unsupported multidisk archive"; + case MZ_ZIP_DECOMPRESSION_FAILED: + return "decompression failed or archive is corrupted"; + case MZ_ZIP_COMPRESSION_FAILED: + return "compression failed"; + case MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE: + return "unexpected decompressed size"; + case MZ_ZIP_CRC_CHECK_FAILED: + return "CRC-32 check failed"; + case MZ_ZIP_UNSUPPORTED_CDIR_SIZE: + return "unsupported central directory size"; + case MZ_ZIP_ALLOC_FAILED: + return "allocation failed"; + case MZ_ZIP_FILE_OPEN_FAILED: + return "file open failed"; + case MZ_ZIP_FILE_CREATE_FAILED: + return "file create failed"; + case MZ_ZIP_FILE_WRITE_FAILED: + return "file write failed"; + case MZ_ZIP_FILE_READ_FAILED: + return "file read failed"; + case MZ_ZIP_FILE_CLOSE_FAILED: + return "file close failed"; + case MZ_ZIP_FILE_SEEK_FAILED: + return "file seek failed"; + case MZ_ZIP_FILE_STAT_FAILED: + return "file stat failed"; + case MZ_ZIP_INVALID_PARAMETER: + return "invalid parameter"; + case MZ_ZIP_INVALID_FILENAME: + return "invalid filename"; + case MZ_ZIP_BUF_TOO_SMALL: + return "buffer too small"; + case MZ_ZIP_INTERNAL_ERROR: + return "internal error"; + case MZ_ZIP_FILE_NOT_FOUND: + return "file not found"; + case MZ_ZIP_ARCHIVE_TOO_LARGE: + return "archive is too large"; + case MZ_ZIP_VALIDATION_FAILED: + return "validation failed"; + case MZ_ZIP_WRITE_CALLBACK_FAILED: + return "write calledback failed"; + default: + break; + } + + return "unknown error"; +} + +/* Note: Just because the archive is not zip64 doesn't necessarily mean it doesn't have Zip64 extended information extra field, argh. */ +mz_bool mz_zip_is_zip64(mz_zip_archive *pZip) +{ + if ((!pZip) || (!pZip->m_pState)) + return MZ_FALSE; + + return pZip->m_pState->m_zip64; +} + +size_t mz_zip_get_central_dir_size(mz_zip_archive *pZip) +{ + if ((!pZip) || (!pZip->m_pState)) + return 0; + + return pZip->m_pState->m_central_dir.m_size; +} + +mz_uint mz_zip_reader_get_num_files(mz_zip_archive *pZip) +{ + return pZip ? pZip->m_total_files : 0; +} + +mz_uint64 mz_zip_get_archive_size(mz_zip_archive *pZip) +{ + if (!pZip) + return 0; + return pZip->m_archive_size; +} + +mz_uint64 mz_zip_get_archive_file_start_offset(mz_zip_archive *pZip) +{ + if ((!pZip) || (!pZip->m_pState)) + return 0; + return pZip->m_pState->m_file_archive_start_ofs; +} + +MZ_FILE *mz_zip_get_cfile(mz_zip_archive *pZip) +{ + if ((!pZip) || (!pZip->m_pState)) + return 0; + return pZip->m_pState->m_pFile; +} + +size_t mz_zip_read_archive_data(mz_zip_archive *pZip, mz_uint64 file_ofs, void *pBuf, size_t n) +{ + if ((!pZip) || (!pZip->m_pState) || (!pBuf) || (!pZip->m_pRead)) + return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + + return pZip->m_pRead(pZip->m_pIO_opaque, file_ofs, pBuf, n); +} + +mz_uint mz_zip_reader_get_filename(mz_zip_archive *pZip, mz_uint file_index, char *pFilename, mz_uint filename_buf_size) +{ + mz_uint n; + const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index); + if (!p) + { + if (filename_buf_size) + pFilename[0] = '\0'; + mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER); + return 0; + } + n = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS); + if (filename_buf_size) + { + n = MZ_MIN(n, filename_buf_size - 1); + memcpy(pFilename, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, n); + pFilename[n] = '\0'; + } + return n + 1; +} + +mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index, mz_zip_archive_file_stat *pStat) +{ + return mz_zip_file_stat_internal(pZip, file_index, mz_zip_get_cdh(pZip, file_index), pStat, NULL); +} + +mz_bool mz_zip_end(mz_zip_archive *pZip) +{ + if (!pZip) + return MZ_FALSE; + + if (pZip->m_zip_mode == MZ_ZIP_MODE_READING) + return mz_zip_reader_end(pZip); +#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS + else if ((pZip->m_zip_mode == MZ_ZIP_MODE_WRITING) || (pZip->m_zip_mode == MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED)) + return mz_zip_writer_end(pZip); +#endif + + return MZ_FALSE; +} + +#ifdef __cplusplus +} +#endif + +#endif /*#ifndef MINIZ_NO_ARCHIVE_APIS*/ diff --git a/src/thirdparty/miniz/miniz.h b/src/thirdparty/miniz/miniz.h new file mode 100755 index 0000000..42f7ece --- /dev/null +++ b/src/thirdparty/miniz/miniz.h @@ -0,0 +1,1337 @@ +/* miniz.c 2.1.0 - public domain deflate/inflate, zlib-subset, ZIP reading/writing/appending, PNG writing + See "unlicense" statement at the end of this file. + Rich Geldreich , last updated Oct. 13, 2013 + Implements RFC 1950: http://www.ietf.org/rfc/rfc1950.txt and RFC 1951: http://www.ietf.org/rfc/rfc1951.txt + + Most API's defined in miniz.c are optional. For example, to disable the archive related functions just define + MINIZ_NO_ARCHIVE_APIS, or to get rid of all stdio usage define MINIZ_NO_STDIO (see the list below for more macros). + + * Low-level Deflate/Inflate implementation notes: + + Compression: Use the "tdefl" API's. The compressor supports raw, static, and dynamic blocks, lazy or + greedy parsing, match length filtering, RLE-only, and Huffman-only streams. It performs and compresses + approximately as well as zlib. + + Decompression: Use the "tinfl" API's. The entire decompressor is implemented as a single function + coroutine: see tinfl_decompress(). It supports decompression into a 32KB (or larger power of 2) wrapping buffer, or into a memory + block large enough to hold the entire file. + + The low-level tdefl/tinfl API's do not make any use of dynamic memory allocation. + + * zlib-style API notes: + + miniz.c implements a fairly large subset of zlib. There's enough functionality present for it to be a drop-in + zlib replacement in many apps: + The z_stream struct, optional memory allocation callbacks + deflateInit/deflateInit2/deflate/deflateReset/deflateEnd/deflateBound + inflateInit/inflateInit2/inflate/inflateReset/inflateEnd + compress, compress2, compressBound, uncompress + CRC-32, Adler-32 - Using modern, minimal code size, CPU cache friendly routines. + Supports raw deflate streams or standard zlib streams with adler-32 checking. + + Limitations: + The callback API's are not implemented yet. No support for gzip headers or zlib static dictionaries. + I've tried to closely emulate zlib's various flavors of stream flushing and return status codes, but + there are no guarantees that miniz.c pulls this off perfectly. + + * PNG writing: See the tdefl_write_image_to_png_file_in_memory() function, originally written by + Alex Evans. Supports 1-4 bytes/pixel images. + + * ZIP archive API notes: + + The ZIP archive API's where designed with simplicity and efficiency in mind, with just enough abstraction to + get the job done with minimal fuss. There are simple API's to retrieve file information, read files from + existing archives, create new archives, append new files to existing archives, or clone archive data from + one archive to another. It supports archives located in memory or the heap, on disk (using stdio.h), + or you can specify custom file read/write callbacks. + + - Archive reading: Just call this function to read a single file from a disk archive: + + void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, + size_t *pSize, mz_uint zip_flags); + + For more complex cases, use the "mz_zip_reader" functions. Upon opening an archive, the entire central + directory is located and read as-is into memory, and subsequent file access only occurs when reading individual files. + + - Archives file scanning: The simple way is to use this function to scan a loaded archive for a specific file: + + int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags); + + The locate operation can optionally check file comments too, which (as one example) can be used to identify + multiple versions of the same file in an archive. This function uses a simple linear search through the central + directory, so it's not very fast. + + Alternately, you can iterate through all the files in an archive (using mz_zip_reader_get_num_files()) and + retrieve detailed info on each file by calling mz_zip_reader_file_stat(). + + - Archive creation: Use the "mz_zip_writer" functions. The ZIP writer immediately writes compressed file data + to disk and builds an exact image of the central directory in memory. The central directory image is written + all at once at the end of the archive file when the archive is finalized. + + The archive writer can optionally align each file's local header and file data to any power of 2 alignment, + which can be useful when the archive will be read from optical media. Also, the writer supports placing + arbitrary data blobs at the very beginning of ZIP archives. Archives written using either feature are still + readable by any ZIP tool. + + - Archive appending: The simple way to add a single file to an archive is to call this function: + + mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name, + const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags); + + The archive will be created if it doesn't already exist, otherwise it'll be appended to. + Note the appending is done in-place and is not an atomic operation, so if something goes wrong + during the operation it's possible the archive could be left without a central directory (although the local + file headers and file data will be fine, so the archive will be recoverable). + + For more complex archive modification scenarios: + 1. The safest way is to use a mz_zip_reader to read the existing archive, cloning only those bits you want to + preserve into a new archive using using the mz_zip_writer_add_from_zip_reader() function (which compiles the + compressed file data as-is). When you're done, delete the old archive and rename the newly written archive, and + you're done. This is safe but requires a bunch of temporary disk space or heap memory. + + 2. Or, you can convert an mz_zip_reader in-place to an mz_zip_writer using mz_zip_writer_init_from_reader(), + append new files as needed, then finalize the archive which will write an updated central directory to the + original archive. (This is basically what mz_zip_add_mem_to_archive_file_in_place() does.) There's a + possibility that the archive's central directory could be lost with this method if anything goes wrong, though. + + - ZIP archive support limitations: + No zip64 or spanning support. Extraction functions can only handle unencrypted, stored or deflated files. + Requires streams capable of seeking. + + * This is a header file library, like stb_image.c. To get only a header file, either cut and paste the + below header, or create miniz.h, #define MINIZ_HEADER_FILE_ONLY, and then include miniz.c from it. + + * Important: For best perf. be sure to customize the below macros for your target platform: + #define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1 + #define MINIZ_LITTLE_ENDIAN 1 + #define MINIZ_HAS_64BIT_REGISTERS 1 + + * On platforms using glibc, Be sure to "#define _LARGEFILE64_SOURCE 1" before including miniz.c to ensure miniz + uses the 64-bit variants: fopen64(), stat64(), etc. Otherwise you won't be able to process large files + (i.e. 32-bit stat() fails for me on files > 0x7FFFFFFF bytes). +*/ +#pragma once + +/* Defines to completely disable specific portions of miniz.c: + If all macros here are defined the only functionality remaining will be CRC-32, adler-32, tinfl, and tdefl. */ + +/* Define MINIZ_NO_STDIO to disable all usage and any functions which rely on stdio for file I/O. */ +/*#define MINIZ_NO_STDIO */ + +/* If MINIZ_NO_TIME is specified then the ZIP archive functions will not be able to get the current time, or */ +/* get/set file times, and the C run-time funcs that get/set times won't be called. */ +/* The current downside is the times written to your archives will be from 1979. */ +/*#define MINIZ_NO_TIME */ + +/* Define MINIZ_NO_ARCHIVE_APIS to disable all ZIP archive API's. */ +/*#define MINIZ_NO_ARCHIVE_APIS */ + +/* Define MINIZ_NO_ARCHIVE_WRITING_APIS to disable all writing related ZIP archive API's. */ +/*#define MINIZ_NO_ARCHIVE_WRITING_APIS */ + +/* Define MINIZ_NO_ZLIB_APIS to remove all ZLIB-style compression/decompression API's. */ +/*#define MINIZ_NO_ZLIB_APIS */ + +/* Define MINIZ_NO_ZLIB_COMPATIBLE_NAME to disable zlib names, to prevent conflicts against stock zlib. */ +/*#define MINIZ_NO_ZLIB_COMPATIBLE_NAMES */ + +/* Define MINIZ_NO_MALLOC to disable all calls to malloc, free, and realloc. + Note if MINIZ_NO_MALLOC is defined then the user must always provide custom user alloc/free/realloc + callbacks to the zlib and archive API's, and a few stand-alone helper API's which don't provide custom user + functions (such as tdefl_compress_mem_to_heap() and tinfl_decompress_mem_to_heap()) won't work. */ +/*#define MINIZ_NO_MALLOC */ + +#if defined(__TINYC__) && (defined(__linux) || defined(__linux__)) +/* TODO: Work around "error: include file 'sys\utime.h' when compiling with tcc on Linux */ +#define MINIZ_NO_TIME +#endif + +#include + +#if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_ARCHIVE_APIS) +#include +#endif + +#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__i386) || defined(__i486__) || defined(__i486) || defined(i386) || defined(__ia64__) || defined(__x86_64__) +/* MINIZ_X86_OR_X64_CPU is only used to help set the below macros. */ +#define MINIZ_X86_OR_X64_CPU 0 +#else +#define MINIZ_X86_OR_X64_CPU 0 +#endif + +#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || MINIZ_X86_OR_X64_CPU +/* Set MINIZ_LITTLE_ENDIAN to 1 if the processor is little endian. */ +#define MINIZ_LITTLE_ENDIAN 1 +#else +#define MINIZ_LITTLE_ENDIAN 0 +#endif + +/* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES only if not set */ +//#if !defined(MINIZ_USE_UNALIGNED_LOADS_AND_STORES) +//#if MINIZ_X86_OR_X64_CPU +///* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient integer loads and stores from unaligned addresses. */ +#define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 0 +//#define MINIZ_UNALIGNED_USE_MEMCPY +//#else +//#define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 0 +//#endif +//#endif + +#if defined(_M_X64) || defined(_WIN64) || defined(__MINGW64__) || defined(_LP64) || defined(__LP64__) || defined(__ia64__) || defined(__x86_64__) +/* Set MINIZ_HAS_64BIT_REGISTERS to 1 if operations on 64-bit integers are reasonably fast (and don't involve compiler generated calls to helper functions). */ +//#define MINIZ_HAS_64BIT_REGISTERS 1 +#else +#define MINIZ_HAS_64BIT_REGISTERS 0 +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* ------------------- zlib-style API Definitions. */ + +/* For more compatibility with zlib, miniz.c uses unsigned long for some parameters/struct members. Beware: mz_ulong can be either 32 or 64-bits! */ +typedef unsigned long mz_ulong; + +/* mz_free() internally uses the MZ_FREE() macro (which by default calls free() unless you've modified the MZ_MALLOC macro) to release a block allocated from the heap. */ +void mz_free(void *p); + +#define MZ_ADLER32_INIT (1) +/* mz_adler32() returns the initial adler-32 value to use when called with ptr==NULL. */ +mz_ulong mz_adler32(mz_ulong adler, const unsigned char *ptr, size_t buf_len); + +#define MZ_CRC32_INIT (0) +/* mz_crc32() returns the initial CRC-32 value to use when called with ptr==NULL. */ +mz_ulong mz_crc32(mz_ulong crc, const unsigned char *ptr, size_t buf_len); + +/* Compression strategies. */ +enum +{ + MZ_DEFAULT_STRATEGY = 0, + MZ_FILTERED = 1, + MZ_HUFFMAN_ONLY = 2, + MZ_RLE = 3, + MZ_FIXED = 4 +}; + +/* Method */ +#define MZ_DEFLATED 8 + +/* Heap allocation callbacks. +Note that mz_alloc_func parameter types purpsosely differ from zlib's: items/size is size_t, not unsigned long. */ +typedef void *(*mz_alloc_func)(void *opaque, size_t items, size_t size); +typedef void (*mz_free_func)(void *opaque, void *address); +typedef void *(*mz_realloc_func)(void *opaque, void *address, size_t items, size_t size); + +/* Compression levels: 0-9 are the standard zlib-style levels, 10 is best possible compression (not zlib compatible, and may be very slow), MZ_DEFAULT_COMPRESSION=MZ_DEFAULT_LEVEL. */ +enum +{ + MZ_NO_COMPRESSION = 0, + MZ_BEST_SPEED = 1, + MZ_BEST_COMPRESSION = 9, + MZ_UBER_COMPRESSION = 10, + MZ_DEFAULT_LEVEL = 6, + MZ_DEFAULT_COMPRESSION = -1 +}; + +#define MZ_VERSION "10.1.0" +#define MZ_VERNUM 0xA100 +#define MZ_VER_MAJOR 10 +#define MZ_VER_MINOR 1 +#define MZ_VER_REVISION 0 +#define MZ_VER_SUBREVISION 0 + +#ifndef MINIZ_NO_ZLIB_APIS + +/* Flush values. For typical usage you only need MZ_NO_FLUSH and MZ_FINISH. The other values are for advanced use (refer to the zlib docs). */ +enum +{ + MZ_NO_FLUSH = 0, + MZ_PARTIAL_FLUSH = 1, + MZ_SYNC_FLUSH = 2, + MZ_FULL_FLUSH = 3, + MZ_FINISH = 4, + MZ_BLOCK = 5 +}; + +/* Return status codes. MZ_PARAM_ERROR is non-standard. */ +enum +{ + MZ_OK = 0, + MZ_STREAM_END = 1, + MZ_NEED_DICT = 2, + MZ_ERRNO = -1, + MZ_STREAM_ERROR = -2, + MZ_DATA_ERROR = -3, + MZ_MEM_ERROR = -4, + MZ_BUF_ERROR = -5, + MZ_VERSION_ERROR = -6, + MZ_PARAM_ERROR = -10000 +}; + +/* Window bits */ +#define MZ_DEFAULT_WINDOW_BITS 15 + +struct mz_internal_state; + +/* Compression/decompression stream struct. */ +typedef struct mz_stream_s +{ + const unsigned char *next_in; /* pointer to next byte to read */ + unsigned int avail_in; /* number of bytes available at next_in */ + mz_ulong total_in; /* total number of bytes consumed so far */ + + unsigned char *next_out; /* pointer to next byte to write */ + unsigned int avail_out; /* number of bytes that can be written to next_out */ + mz_ulong total_out; /* total number of bytes produced so far */ + + char *msg; /* error msg (unused) */ + struct mz_internal_state *state; /* internal state, allocated by zalloc/zfree */ + + mz_alloc_func zalloc; /* optional heap allocation function (defaults to malloc) */ + mz_free_func zfree; /* optional heap free function (defaults to free) */ + void *opaque; /* heap alloc function user pointer */ + + int data_type; /* data_type (unused) */ + mz_ulong adler; /* adler32 of the source or uncompressed data */ + mz_ulong reserved; /* not used */ +} mz_stream; + +typedef mz_stream *mz_streamp; + +/* Returns the version string of miniz.c. */ +const char *mz_version(void); + +/* mz_deflateInit() initializes a compressor with default options: */ +/* Parameters: */ +/* pStream must point to an initialized mz_stream struct. */ +/* level must be between [MZ_NO_COMPRESSION, MZ_BEST_COMPRESSION]. */ +/* level 1 enables a specially optimized compression function that's been optimized purely for performance, not ratio. */ +/* (This special func. is currently only enabled when MINIZ_USE_UNALIGNED_LOADS_AND_STORES and MINIZ_LITTLE_ENDIAN are defined.) */ +/* Return values: */ +/* MZ_OK on success. */ +/* MZ_STREAM_ERROR if the stream is bogus. */ +/* MZ_PARAM_ERROR if the input parameters are bogus. */ +/* MZ_MEM_ERROR on out of memory. */ +int mz_deflateInit(mz_streamp pStream, int level); + +/* mz_deflateInit2() is like mz_deflate(), except with more control: */ +/* Additional parameters: */ +/* method must be MZ_DEFLATED */ +/* window_bits must be MZ_DEFAULT_WINDOW_BITS (to wrap the deflate stream with zlib header/adler-32 footer) or -MZ_DEFAULT_WINDOW_BITS (raw deflate/no header or footer) */ +/* mem_level must be between [1, 9] (it's checked but ignored by miniz.c) */ +int mz_deflateInit2(mz_streamp pStream, int level, int method, int window_bits, int mem_level, int strategy); + +/* Quickly resets a compressor without having to reallocate anything. Same as calling mz_deflateEnd() followed by mz_deflateInit()/mz_deflateInit2(). */ +int mz_deflateReset(mz_streamp pStream); + +/* mz_deflate() compresses the input to output, consuming as much of the input and producing as much output as possible. */ +/* Parameters: */ +/* pStream is the stream to read from and write to. You must initialize/update the next_in, avail_in, next_out, and avail_out members. */ +/* flush may be MZ_NO_FLUSH, MZ_PARTIAL_FLUSH/MZ_SYNC_FLUSH, MZ_FULL_FLUSH, or MZ_FINISH. */ +/* Return values: */ +/* MZ_OK on success (when flushing, or if more input is needed but not available, and/or there's more output to be written but the output buffer is full). */ +/* MZ_STREAM_END if all input has been consumed and all output bytes have been written. Don't call mz_deflate() on the stream anymore. */ +/* MZ_STREAM_ERROR if the stream is bogus. */ +/* MZ_PARAM_ERROR if one of the parameters is invalid. */ +/* MZ_BUF_ERROR if no forward progress is possible because the input and/or output buffers are empty. (Fill up the input buffer or free up some output space and try again.) */ +int mz_deflate(mz_streamp pStream, int flush); + +/* mz_deflateEnd() deinitializes a compressor: */ +/* Return values: */ +/* MZ_OK on success. */ +/* MZ_STREAM_ERROR if the stream is bogus. */ +int mz_deflateEnd(mz_streamp pStream); + +/* mz_deflateBound() returns a (very) conservative upper bound on the amount of data that could be generated by deflate(), assuming flush is set to only MZ_NO_FLUSH or MZ_FINISH. */ +mz_ulong mz_deflateBound(mz_streamp pStream, mz_ulong source_len); + +/* Single-call compression functions mz_compress() and mz_compress2(): */ +/* Returns MZ_OK on success, or one of the error codes from mz_deflate() on failure. */ +int mz_compress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len); +int mz_compress2(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len, int level); + +/* mz_compressBound() returns a (very) conservative upper bound on the amount of data that could be generated by calling mz_compress(). */ +mz_ulong mz_compressBound(mz_ulong source_len); + +/* Initializes a decompressor. */ +int mz_inflateInit(mz_streamp pStream); + +/* mz_inflateInit2() is like mz_inflateInit() with an additional option that controls the window size and whether or not the stream has been wrapped with a zlib header/footer: */ +/* window_bits must be MZ_DEFAULT_WINDOW_BITS (to parse zlib header/footer) or -MZ_DEFAULT_WINDOW_BITS (raw deflate). */ +int mz_inflateInit2(mz_streamp pStream, int window_bits); + +/* Quickly resets a compressor without having to reallocate anything. Same as calling mz_inflateEnd() followed by mz_inflateInit()/mz_inflateInit2(). */ +int mz_inflateReset(mz_streamp pStream); + +/* Decompresses the input stream to the output, consuming only as much of the input as needed, and writing as much to the output as possible. */ +/* Parameters: */ +/* pStream is the stream to read from and write to. You must initialize/update the next_in, avail_in, next_out, and avail_out members. */ +/* flush may be MZ_NO_FLUSH, MZ_SYNC_FLUSH, or MZ_FINISH. */ +/* On the first call, if flush is MZ_FINISH it's assumed the input and output buffers are both sized large enough to decompress the entire stream in a single call (this is slightly faster). */ +/* MZ_FINISH implies that there are no more source bytes available beside what's already in the input buffer, and that the output buffer is large enough to hold the rest of the decompressed data. */ +/* Return values: */ +/* MZ_OK on success. Either more input is needed but not available, and/or there's more output to be written but the output buffer is full. */ +/* MZ_STREAM_END if all needed input has been consumed and all output bytes have been written. For zlib streams, the adler-32 of the decompressed data has also been verified. */ +/* MZ_STREAM_ERROR if the stream is bogus. */ +/* MZ_DATA_ERROR if the deflate stream is invalid. */ +/* MZ_PARAM_ERROR if one of the parameters is invalid. */ +/* MZ_BUF_ERROR if no forward progress is possible because the input buffer is empty but the inflater needs more input to continue, or if the output buffer is not large enough. Call mz_inflate() again */ +/* with more input data, or with more room in the output buffer (except when using single call decompression, described above). */ +int mz_inflate(mz_streamp pStream, int flush); + +/* Deinitializes a decompressor. */ +int mz_inflateEnd(mz_streamp pStream); + +/* Single-call decompression. */ +/* Returns MZ_OK on success, or one of the error codes from mz_inflate() on failure. */ +int mz_uncompress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len); + +/* Returns a string description of the specified error code, or NULL if the error code is invalid. */ +const char *mz_error(int err); + +/* Redefine zlib-compatible names to miniz equivalents, so miniz.c can be used as a drop-in replacement for the subset of zlib that miniz.c supports. */ +/* Define MINIZ_NO_ZLIB_COMPATIBLE_NAMES to disable zlib-compatibility if you use zlib in the same project. */ +#ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES +typedef unsigned char Byte; +typedef unsigned int uInt; +typedef mz_ulong uLong; +typedef Byte Bytef; +typedef uInt uIntf; +typedef char charf; +typedef int intf; +typedef void *voidpf; +typedef uLong uLongf; +typedef void *voidp; +typedef void *const voidpc; +#define Z_NULL 0 +#define Z_NO_FLUSH MZ_NO_FLUSH +#define Z_PARTIAL_FLUSH MZ_PARTIAL_FLUSH +#define Z_SYNC_FLUSH MZ_SYNC_FLUSH +#define Z_FULL_FLUSH MZ_FULL_FLUSH +#define Z_FINISH MZ_FINISH +#define Z_BLOCK MZ_BLOCK +#define Z_OK MZ_OK +#define Z_STREAM_END MZ_STREAM_END +#define Z_NEED_DICT MZ_NEED_DICT +#define Z_ERRNO MZ_ERRNO +#define Z_STREAM_ERROR MZ_STREAM_ERROR +#define Z_DATA_ERROR MZ_DATA_ERROR +#define Z_MEM_ERROR MZ_MEM_ERROR +#define Z_BUF_ERROR MZ_BUF_ERROR +#define Z_VERSION_ERROR MZ_VERSION_ERROR +#define Z_PARAM_ERROR MZ_PARAM_ERROR +#define Z_NO_COMPRESSION MZ_NO_COMPRESSION +#define Z_BEST_SPEED MZ_BEST_SPEED +#define Z_BEST_COMPRESSION MZ_BEST_COMPRESSION +#define Z_DEFAULT_COMPRESSION MZ_DEFAULT_COMPRESSION +#define Z_DEFAULT_STRATEGY MZ_DEFAULT_STRATEGY +#define Z_FILTERED MZ_FILTERED +#define Z_HUFFMAN_ONLY MZ_HUFFMAN_ONLY +#define Z_RLE MZ_RLE +#define Z_FIXED MZ_FIXED +#define Z_DEFLATED MZ_DEFLATED +#define Z_DEFAULT_WINDOW_BITS MZ_DEFAULT_WINDOW_BITS +#define alloc_func mz_alloc_func +#define free_func mz_free_func +#define internal_state mz_internal_state +#define z_stream mz_stream +#define deflateInit mz_deflateInit +#define deflateInit2 mz_deflateInit2 +#define deflateReset mz_deflateReset +#define deflate mz_deflate +#define deflateEnd mz_deflateEnd +#define deflateBound mz_deflateBound +#define compress mz_compress +#define compress2 mz_compress2 +#define compressBound mz_compressBound +#define inflateInit mz_inflateInit +#define inflateInit2 mz_inflateInit2 +#define inflateReset mz_inflateReset +#define inflate mz_inflate +#define inflateEnd mz_inflateEnd +#define uncompress mz_uncompress +#define crc32 mz_crc32 +#define adler32 mz_adler32 +#define MAX_WBITS 15 +#define MAX_MEM_LEVEL 9 +#define zError mz_error +#define ZLIB_VERSION MZ_VERSION +#define ZLIB_VERNUM MZ_VERNUM +#define ZLIB_VER_MAJOR MZ_VER_MAJOR +#define ZLIB_VER_MINOR MZ_VER_MINOR +#define ZLIB_VER_REVISION MZ_VER_REVISION +#define ZLIB_VER_SUBREVISION MZ_VER_SUBREVISION +#define zlibVersion mz_version +#define zlib_version mz_version() +#endif /* #ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES */ + +#endif /* MINIZ_NO_ZLIB_APIS */ + +#ifdef __cplusplus +} +#endif +#pragma once +#include +#include +#include +#include + +/* ------------------- Types and macros */ +typedef unsigned char mz_uint8; +typedef signed short mz_int16; +typedef unsigned short mz_uint16; +typedef unsigned int mz_uint32; +typedef unsigned int mz_uint; +typedef int64_t mz_int64; +typedef uint64_t mz_uint64; +typedef int mz_bool; + +#define MZ_FALSE (0) +#define MZ_TRUE (1) + +/* Works around MSVC's spammy "warning C4127: conditional expression is constant" message. */ +#ifdef _MSC_VER +#define MZ_MACRO_END while (0, 0) +#else +#define MZ_MACRO_END while (0) +#endif + +#ifdef MINIZ_NO_STDIO +#define MZ_FILE void * +#else +#include +#define MZ_FILE FILE +#endif /* #ifdef MINIZ_NO_STDIO */ + +#ifdef MINIZ_NO_TIME +typedef struct mz_dummy_time_t_tag +{ + int m_dummy; +} mz_dummy_time_t; +#define MZ_TIME_T mz_dummy_time_t +#else +#define MZ_TIME_T time_t +#endif + +#define MZ_ASSERT(x) assert(x) + +#ifdef MINIZ_NO_MALLOC +#define MZ_MALLOC(x) NULL +#define MZ_FREE(x) (void)x, ((void)0) +#define MZ_REALLOC(p, x) NULL +#else +#define MZ_MALLOC(x) malloc(x) +#define MZ_FREE(x) free(x) +#define MZ_REALLOC(p, x) realloc(p, x) +#endif + +#define MZ_MAX(a, b) (((a) > (b)) ? (a) : (b)) +#define MZ_MIN(a, b) (((a) < (b)) ? (a) : (b)) +#define MZ_CLEAR_OBJ(obj) memset(&(obj), 0, sizeof(obj)) + +#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN +#define MZ_READ_LE16(p) *((const mz_uint16 *)(p)) +#define MZ_READ_LE32(p) *((const mz_uint32 *)(p)) +#else +// #define MZ_READ_LE16(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U)) +// #define MZ_READ_LE32(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U) | ((mz_uint32)(((const mz_uint8 *)(p))[2]) << 16U) | ((mz_uint32)(((const mz_uint8 *)(p))[3]) << 24U)) +#include "unaligned.h" +#define MZ_READ_LE16(p) UNALIGNED_LE16(p) +#define MZ_READ_LE32(p) UNALIGNED_LE32(p) +#endif + +#define MZ_READ_LE64(p) (((mz_uint64)MZ_READ_LE32(p)) | (((mz_uint64)MZ_READ_LE32((const mz_uint8 *)(p) + sizeof(mz_uint32))) << 32U)) + +#ifdef _MSC_VER +#define MZ_FORCEINLINE __forceinline +#elif defined(__GNUC__) +#define MZ_FORCEINLINE __inline__ __attribute__((__always_inline__)) +#else +#define MZ_FORCEINLINE inline +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +extern void *miniz_def_alloc_func(void *opaque, size_t items, size_t size); +extern void miniz_def_free_func(void *opaque, void *address); +extern void *miniz_def_realloc_func(void *opaque, void *address, size_t items, size_t size); + +#define MZ_UINT16_MAX (0xFFFFU) +#define MZ_UINT32_MAX (0xFFFFFFFFU) + +#ifdef __cplusplus +} +#endif +#pragma once + + +#ifdef __cplusplus +extern "C" { +#endif +/* ------------------- Low-level Compression API Definitions */ + +/* Set TDEFL_LESS_MEMORY to 1 to use less memory (compression will be slightly slower, and raw/dynamic blocks will be output more frequently). */ +#define TDEFL_LESS_MEMORY 0 + +/* tdefl_init() compression flags logically OR'd together (low 12 bits contain the max. number of probes per dictionary search): */ +/* TDEFL_DEFAULT_MAX_PROBES: The compressor defaults to 128 dictionary probes per dictionary search. 0=Huffman only, 1=Huffman+LZ (fastest/crap compression), 4095=Huffman+LZ (slowest/best compression). */ +enum +{ + TDEFL_HUFFMAN_ONLY = 0, + TDEFL_DEFAULT_MAX_PROBES = 128, + TDEFL_MAX_PROBES_MASK = 0xFFF +}; + +/* TDEFL_WRITE_ZLIB_HEADER: If set, the compressor outputs a zlib header before the deflate data, and the Adler-32 of the source data at the end. Otherwise, you'll get raw deflate data. */ +/* TDEFL_COMPUTE_ADLER32: Always compute the adler-32 of the input data (even when not writing zlib headers). */ +/* TDEFL_GREEDY_PARSING_FLAG: Set to use faster greedy parsing, instead of more efficient lazy parsing. */ +/* TDEFL_NONDETERMINISTIC_PARSING_FLAG: Enable to decrease the compressor's initialization time to the minimum, but the output may vary from run to run given the same input (depending on the contents of memory). */ +/* TDEFL_RLE_MATCHES: Only look for RLE matches (matches with a distance of 1) */ +/* TDEFL_FILTER_MATCHES: Discards matches <= 5 chars if enabled. */ +/* TDEFL_FORCE_ALL_STATIC_BLOCKS: Disable usage of optimized Huffman tables. */ +/* TDEFL_FORCE_ALL_RAW_BLOCKS: Only use raw (uncompressed) deflate blocks. */ +/* The low 12 bits are reserved to control the max # of hash probes per dictionary lookup (see TDEFL_MAX_PROBES_MASK). */ +enum +{ + TDEFL_WRITE_ZLIB_HEADER = 0x01000, + TDEFL_COMPUTE_ADLER32 = 0x02000, + TDEFL_GREEDY_PARSING_FLAG = 0x04000, + TDEFL_NONDETERMINISTIC_PARSING_FLAG = 0x08000, + TDEFL_RLE_MATCHES = 0x10000, + TDEFL_FILTER_MATCHES = 0x20000, + TDEFL_FORCE_ALL_STATIC_BLOCKS = 0x40000, + TDEFL_FORCE_ALL_RAW_BLOCKS = 0x80000 +}; + +/* High level compression functions: */ +/* tdefl_compress_mem_to_heap() compresses a block in memory to a heap block allocated via malloc(). */ +/* On entry: */ +/* pSrc_buf, src_buf_len: Pointer and size of source block to compress. */ +/* flags: The max match finder probes (default is 128) logically OR'd against the above flags. Higher probes are slower but improve compression. */ +/* On return: */ +/* Function returns a pointer to the compressed data, or NULL on failure. */ +/* *pOut_len will be set to the compressed data's size, which could be larger than src_buf_len on uncompressible data. */ +/* The caller must free() the returned block when it's no longer needed. */ +void *tdefl_compress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags); + +/* tdefl_compress_mem_to_mem() compresses a block in memory to another block in memory. */ +/* Returns 0 on failure. */ +size_t tdefl_compress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags); + +/* Compresses an image to a compressed PNG file in memory. */ +/* On entry: */ +/* pImage, w, h, and num_chans describe the image to compress. num_chans may be 1, 2, 3, or 4. */ +/* The image pitch in bytes per scanline will be w*num_chans. The leftmost pixel on the top scanline is stored first in memory. */ +/* level may range from [0,10], use MZ_NO_COMPRESSION, MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc. or a decent default is MZ_DEFAULT_LEVEL */ +/* If flip is true, the image will be flipped on the Y axis (useful for OpenGL apps). */ +/* On return: */ +/* Function returns a pointer to the compressed data, or NULL on failure. */ +/* *pLen_out will be set to the size of the PNG image file. */ +/* The caller must mz_free() the returned heap block (which will typically be larger than *pLen_out) when it's no longer needed. */ +void *tdefl_write_image_to_png_file_in_memory_ex(const void *pImage, int w, int h, int num_chans, size_t *pLen_out, mz_uint level, mz_bool flip); +void *tdefl_write_image_to_png_file_in_memory(const void *pImage, int w, int h, int num_chans, size_t *pLen_out); + +/* Output stream interface. The compressor uses this interface to write compressed data. It'll typically be called TDEFL_OUT_BUF_SIZE at a time. */ +typedef mz_bool (*tdefl_put_buf_func_ptr)(const void *pBuf, int len, void *pUser); + +/* tdefl_compress_mem_to_output() compresses a block to an output stream. The above helpers use this function internally. */ +mz_bool tdefl_compress_mem_to_output(const void *pBuf, size_t buf_len, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags); + +enum +{ + TDEFL_MAX_HUFF_TABLES = 3, + TDEFL_MAX_HUFF_SYMBOLS_0 = 288, + TDEFL_MAX_HUFF_SYMBOLS_1 = 32, + TDEFL_MAX_HUFF_SYMBOLS_2 = 19, + TDEFL_LZ_DICT_SIZE = 32768, + TDEFL_LZ_DICT_SIZE_MASK = TDEFL_LZ_DICT_SIZE - 1, + TDEFL_MIN_MATCH_LEN = 3, + TDEFL_MAX_MATCH_LEN = 258 +}; + +/* TDEFL_OUT_BUF_SIZE MUST be large enough to hold a single entire compressed output block (using static/fixed Huffman codes). */ +#if TDEFL_LESS_MEMORY +enum +{ + TDEFL_LZ_CODE_BUF_SIZE = 24 * 1024, + TDEFL_OUT_BUF_SIZE = (TDEFL_LZ_CODE_BUF_SIZE * 13) / 10, + TDEFL_MAX_HUFF_SYMBOLS = 288, + TDEFL_LZ_HASH_BITS = 12, + TDEFL_LEVEL1_HASH_SIZE_MASK = 4095, + TDEFL_LZ_HASH_SHIFT = (TDEFL_LZ_HASH_BITS + 2) / 3, + TDEFL_LZ_HASH_SIZE = 1 << TDEFL_LZ_HASH_BITS +}; +#else +enum +{ + TDEFL_LZ_CODE_BUF_SIZE = 64 * 1024, + TDEFL_OUT_BUF_SIZE = (TDEFL_LZ_CODE_BUF_SIZE * 13) / 10, + TDEFL_MAX_HUFF_SYMBOLS = 288, + TDEFL_LZ_HASH_BITS = 15, + TDEFL_LEVEL1_HASH_SIZE_MASK = 4095, + TDEFL_LZ_HASH_SHIFT = (TDEFL_LZ_HASH_BITS + 2) / 3, + TDEFL_LZ_HASH_SIZE = 1 << TDEFL_LZ_HASH_BITS +}; +#endif + +/* The low-level tdefl functions below may be used directly if the above helper functions aren't flexible enough. The low-level functions don't make any heap allocations, unlike the above helper functions. */ +typedef enum { + TDEFL_STATUS_BAD_PARAM = -2, + TDEFL_STATUS_PUT_BUF_FAILED = -1, + TDEFL_STATUS_OKAY = 0, + TDEFL_STATUS_DONE = 1 +} tdefl_status; + +/* Must map to MZ_NO_FLUSH, MZ_SYNC_FLUSH, etc. enums */ +typedef enum { + TDEFL_NO_FLUSH = 0, + TDEFL_SYNC_FLUSH = 2, + TDEFL_FULL_FLUSH = 3, + TDEFL_FINISH = 4 +} tdefl_flush; + +/* tdefl's compression state structure. */ +typedef struct +{ + tdefl_put_buf_func_ptr m_pPut_buf_func; + void *m_pPut_buf_user; + mz_uint m_flags, m_max_probes[2]; + int m_greedy_parsing; + mz_uint m_adler32, m_lookahead_pos, m_lookahead_size, m_dict_size; + mz_uint8 *m_pLZ_code_buf, *m_pLZ_flags, *m_pOutput_buf, *m_pOutput_buf_end; + mz_uint m_num_flags_left, m_total_lz_bytes, m_lz_code_buf_dict_pos, m_bits_in, m_bit_buffer; + mz_uint m_saved_match_dist, m_saved_match_len, m_saved_lit, m_output_flush_ofs, m_output_flush_remaining, m_finished, m_block_index, m_wants_to_finish; + tdefl_status m_prev_return_status; + const void *m_pIn_buf; + void *m_pOut_buf; + size_t *m_pIn_buf_size, *m_pOut_buf_size; + tdefl_flush m_flush; + const mz_uint8 *m_pSrc; + size_t m_src_buf_left, m_out_buf_ofs; + mz_uint8 m_dict[TDEFL_LZ_DICT_SIZE + TDEFL_MAX_MATCH_LEN - 1]; + mz_uint16 m_huff_count[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS]; + mz_uint16 m_huff_codes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS]; + mz_uint8 m_huff_code_sizes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS]; + mz_uint8 m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE]; + mz_uint16 m_next[TDEFL_LZ_DICT_SIZE]; + mz_uint16 m_hash[TDEFL_LZ_HASH_SIZE]; + mz_uint8 m_output_buf[TDEFL_OUT_BUF_SIZE]; +} tdefl_compressor; + +/* Initializes the compressor. */ +/* There is no corresponding deinit() function because the tdefl API's do not dynamically allocate memory. */ +/* pBut_buf_func: If NULL, output data will be supplied to the specified callback. In this case, the user should call the tdefl_compress_buffer() API for compression. */ +/* If pBut_buf_func is NULL the user should always call the tdefl_compress() API. */ +/* flags: See the above enums (TDEFL_HUFFMAN_ONLY, TDEFL_WRITE_ZLIB_HEADER, etc.) */ +tdefl_status tdefl_init(tdefl_compressor *d, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags); + +/* Compresses a block of data, consuming as much of the specified input buffer as possible, and writing as much compressed data to the specified output buffer as possible. */ +tdefl_status tdefl_compress(tdefl_compressor *d, const void *pIn_buf, size_t *pIn_buf_size, void *pOut_buf, size_t *pOut_buf_size, tdefl_flush flush); + +/* tdefl_compress_buffer() is only usable when the tdefl_init() is called with a non-NULL tdefl_put_buf_func_ptr. */ +/* tdefl_compress_buffer() always consumes the entire input buffer. */ +tdefl_status tdefl_compress_buffer(tdefl_compressor *d, const void *pIn_buf, size_t in_buf_size, tdefl_flush flush); + +tdefl_status tdefl_get_prev_return_status(tdefl_compressor *d); +mz_uint32 tdefl_get_adler32(tdefl_compressor *d); + +/* Create tdefl_compress() flags given zlib-style compression parameters. */ +/* level may range from [0,10] (where 10 is absolute max compression, but may be much slower on some files) */ +/* window_bits may be -15 (raw deflate) or 15 (zlib) */ +/* strategy may be either MZ_DEFAULT_STRATEGY, MZ_FILTERED, MZ_HUFFMAN_ONLY, MZ_RLE, or MZ_FIXED */ +mz_uint tdefl_create_comp_flags_from_zip_params(int level, int window_bits, int strategy); + +#ifndef MINIZ_NO_MALLOC +/* Allocate the tdefl_compressor structure in C so that */ +/* non-C language bindings to tdefl_ API don't need to worry about */ +/* structure size and allocation mechanism. */ +tdefl_compressor *tdefl_compressor_alloc(void); +void tdefl_compressor_free(tdefl_compressor *pComp); +#endif + +#ifdef __cplusplus +} +#endif +#pragma once + +/* ------------------- Low-level Decompression API Definitions */ + +#ifdef __cplusplus +extern "C" { +#endif +/* Decompression flags used by tinfl_decompress(). */ +/* TINFL_FLAG_PARSE_ZLIB_HEADER: If set, the input has a valid zlib header and ends with an adler32 checksum (it's a valid zlib stream). Otherwise, the input is a raw deflate stream. */ +/* TINFL_FLAG_HAS_MORE_INPUT: If set, there are more input bytes available beyond the end of the supplied input buffer. If clear, the input buffer contains all remaining input. */ +/* TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF: If set, the output buffer is large enough to hold the entire decompressed stream. If clear, the output buffer is at least the size of the dictionary (typically 32KB). */ +/* TINFL_FLAG_COMPUTE_ADLER32: Force adler-32 checksum computation of the decompressed bytes. */ +enum +{ + TINFL_FLAG_PARSE_ZLIB_HEADER = 1, + TINFL_FLAG_HAS_MORE_INPUT = 2, + TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF = 4, + TINFL_FLAG_COMPUTE_ADLER32 = 8 +}; + +/* High level decompression functions: */ +/* tinfl_decompress_mem_to_heap() decompresses a block in memory to a heap block allocated via malloc(). */ +/* On entry: */ +/* pSrc_buf, src_buf_len: Pointer and size of the Deflate or zlib source data to decompress. */ +/* On return: */ +/* Function returns a pointer to the decompressed data, or NULL on failure. */ +/* *pOut_len will be set to the decompressed data's size, which could be larger than src_buf_len on uncompressible data. */ +/* The caller must call mz_free() on the returned block when it's no longer needed. */ +void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags); + +/* tinfl_decompress_mem_to_mem() decompresses a block in memory to another block in memory. */ +/* Returns TINFL_DECOMPRESS_MEM_TO_MEM_FAILED on failure, or the number of bytes written on success. */ +#define TINFL_DECOMPRESS_MEM_TO_MEM_FAILED ((size_t)(-1)) +size_t tinfl_decompress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags); + +/* tinfl_decompress_mem_to_callback() decompresses a block in memory to an internal 32KB buffer, and a user provided callback function will be called to flush the buffer. */ +/* Returns 1 on success or 0 on failure. */ +typedef int (*tinfl_put_buf_func_ptr)(const void *pBuf, int len, void *pUser); +int tinfl_decompress_mem_to_callback(const void *pIn_buf, size_t *pIn_buf_size, tinfl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags); + +struct tinfl_decompressor_tag; +typedef struct tinfl_decompressor_tag tinfl_decompressor; + +#ifndef MINIZ_NO_MALLOC +/* Allocate the tinfl_decompressor structure in C so that */ +/* non-C language bindings to tinfl_ API don't need to worry about */ +/* structure size and allocation mechanism. */ +tinfl_decompressor *tinfl_decompressor_alloc(void); +void tinfl_decompressor_free(tinfl_decompressor *pDecomp); +#endif + +/* Max size of LZ dictionary. */ +#define TINFL_LZ_DICT_SIZE 32768 + +/* Return status. */ +typedef enum { + /* This flags indicates the inflator needs 1 or more input bytes to make forward progress, but the caller is indicating that no more are available. The compressed data */ + /* is probably corrupted. If you call the inflator again with more bytes it'll try to continue processing the input but this is a BAD sign (either the data is corrupted or you called it incorrectly). */ + /* If you call it again with no input you'll just get TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS again. */ + TINFL_STATUS_FAILED_CANNOT_MAKE_PROGRESS = -4, + + /* This flag indicates that one or more of the input parameters was obviously bogus. (You can try calling it again, but if you get this error the calling code is wrong.) */ + TINFL_STATUS_BAD_PARAM = -3, + + /* This flags indicate the inflator is finished but the adler32 check of the uncompressed data didn't match. If you call it again it'll return TINFL_STATUS_DONE. */ + TINFL_STATUS_ADLER32_MISMATCH = -2, + + /* This flags indicate the inflator has somehow failed (bad code, corrupted input, etc.). If you call it again without resetting via tinfl_init() it it'll just keep on returning the same status failure code. */ + TINFL_STATUS_FAILED = -1, + + /* Any status code less than TINFL_STATUS_DONE must indicate a failure. */ + + /* This flag indicates the inflator has returned every byte of uncompressed data that it can, has consumed every byte that it needed, has successfully reached the end of the deflate stream, and */ + /* if zlib headers and adler32 checking enabled that it has successfully checked the uncompressed data's adler32. If you call it again you'll just get TINFL_STATUS_DONE over and over again. */ + TINFL_STATUS_DONE = 0, + + /* This flag indicates the inflator MUST have more input data (even 1 byte) before it can make any more forward progress, or you need to clear the TINFL_FLAG_HAS_MORE_INPUT */ + /* flag on the next call if you don't have any more source data. If the source data was somehow corrupted it's also possible (but unlikely) for the inflator to keep on demanding input to */ + /* proceed, so be sure to properly set the TINFL_FLAG_HAS_MORE_INPUT flag. */ + TINFL_STATUS_NEEDS_MORE_INPUT = 1, + + /* This flag indicates the inflator definitely has 1 or more bytes of uncompressed data available, but it cannot write this data into the output buffer. */ + /* Note if the source compressed data was corrupted it's possible for the inflator to return a lot of uncompressed data to the caller. I've been assuming you know how much uncompressed data to expect */ + /* (either exact or worst case) and will stop calling the inflator and fail after receiving too much. In pure streaming scenarios where you have no idea how many bytes to expect this may not be possible */ + /* so I may need to add some code to address this. */ + TINFL_STATUS_HAS_MORE_OUTPUT = 2 +} tinfl_status; + +/* Initializes the decompressor to its initial state. */ +#define tinfl_init(r) \ + do \ + { \ + (r)->m_state = 0; \ + } \ + MZ_MACRO_END +#define tinfl_get_adler32(r) (r)->m_check_adler32 + +/* Main low-level decompressor coroutine function. This is the only function actually needed for decompression. All the other functions are just high-level helpers for improved usability. */ +/* This is a universal API, i.e. it can be used as a building block to build any desired higher level decompression API. In the limit case, it can be called once per every byte input or output. */ +tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags); + +/* Internal/private bits follow. */ +enum +{ + TINFL_MAX_HUFF_TABLES = 3, + TINFL_MAX_HUFF_SYMBOLS_0 = 288, + TINFL_MAX_HUFF_SYMBOLS_1 = 32, + TINFL_MAX_HUFF_SYMBOLS_2 = 19, + TINFL_FAST_LOOKUP_BITS = 10, + TINFL_FAST_LOOKUP_SIZE = 1 << TINFL_FAST_LOOKUP_BITS +}; + +typedef struct +{ + mz_uint8 m_code_size[TINFL_MAX_HUFF_SYMBOLS_0]; + mz_int16 m_look_up[TINFL_FAST_LOOKUP_SIZE], m_tree[TINFL_MAX_HUFF_SYMBOLS_0 * 2]; +} tinfl_huff_table; + +#if MINIZ_HAS_64BIT_REGISTERS +#define TINFL_USE_64BIT_BITBUF 1 +#else +#define TINFL_USE_64BIT_BITBUF 0 +#endif + +#if TINFL_USE_64BIT_BITBUF +typedef mz_uint64 tinfl_bit_buf_t; +#define TINFL_BITBUF_SIZE (64) +#else +typedef mz_uint32 tinfl_bit_buf_t; +#define TINFL_BITBUF_SIZE (32) +#endif + +struct tinfl_decompressor_tag +{ + mz_uint32 m_state, m_num_bits, m_zhdr0, m_zhdr1, m_z_adler32, m_final, m_type, m_check_adler32, m_dist, m_counter, m_num_extra, m_table_sizes[TINFL_MAX_HUFF_TABLES]; + tinfl_bit_buf_t m_bit_buf; + size_t m_dist_from_out_buf_start; + tinfl_huff_table m_tables[TINFL_MAX_HUFF_TABLES]; + mz_uint8 m_raw_header[4], m_len_codes[TINFL_MAX_HUFF_SYMBOLS_0 + TINFL_MAX_HUFF_SYMBOLS_1 + 137]; +}; + +#ifdef __cplusplus +} +#endif + +#pragma once + + +/* ------------------- ZIP archive reading/writing */ + +#ifndef MINIZ_NO_ARCHIVE_APIS + +#ifdef __cplusplus +extern "C" { +#endif + +enum +{ + /* Note: These enums can be reduced as needed to save memory or stack space - they are pretty conservative. */ + MZ_ZIP_MAX_IO_BUF_SIZE = 64 * 1024, + MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE = 512, + MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE = 512 +}; + +typedef struct +{ + /* Central directory file index. */ + mz_uint32 m_file_index; + + /* Byte offset of this entry in the archive's central directory. Note we currently only support up to UINT_MAX or less bytes in the central dir. */ + mz_uint64 m_central_dir_ofs; + + /* These fields are copied directly from the zip's central dir. */ + mz_uint16 m_version_made_by; + mz_uint16 m_version_needed; + mz_uint16 m_bit_flag; + mz_uint16 m_method; + +#ifndef MINIZ_NO_TIME + MZ_TIME_T m_time; +#endif + + /* CRC-32 of uncompressed data. */ + mz_uint32 m_crc32; + + /* File's compressed size. */ + mz_uint64 m_comp_size; + + /* File's uncompressed size. Note, I've seen some old archives where directory entries had 512 bytes for their uncompressed sizes, but when you try to unpack them you actually get 0 bytes. */ + mz_uint64 m_uncomp_size; + + /* Zip internal and external file attributes. */ + mz_uint16 m_internal_attr; + mz_uint32 m_external_attr; + + /* Entry's local header file offset in bytes. */ + mz_uint64 m_local_header_ofs; + + /* Size of comment in bytes. */ + mz_uint32 m_comment_size; + + /* MZ_TRUE if the entry appears to be a directory. */ + mz_bool m_is_directory; + + /* MZ_TRUE if the entry uses encryption/strong encryption (which miniz_zip doesn't support) */ + mz_bool m_is_encrypted; + + /* MZ_TRUE if the file is not encrypted, a patch file, and if it uses a compression method we support. */ + mz_bool m_is_supported; + + /* Filename. If string ends in '/' it's a subdirectory entry. */ + /* Guaranteed to be zero terminated, may be truncated to fit. */ + char m_filename[MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE]; + + /* Comment field. */ + /* Guaranteed to be zero terminated, may be truncated to fit. */ + char m_comment[MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE]; + +} mz_zip_archive_file_stat; + +typedef size_t (*mz_file_read_func)(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n); +typedef size_t (*mz_file_write_func)(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n); +typedef mz_bool (*mz_file_needs_keepalive)(void *pOpaque); + +struct mz_zip_internal_state_tag; +typedef struct mz_zip_internal_state_tag mz_zip_internal_state; + +typedef enum { + MZ_ZIP_MODE_INVALID = 0, + MZ_ZIP_MODE_READING = 1, + MZ_ZIP_MODE_WRITING = 2, + MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED = 3 +} mz_zip_mode; + +typedef enum { + MZ_ZIP_FLAG_CASE_SENSITIVE = 0x0100, + MZ_ZIP_FLAG_IGNORE_PATH = 0x0200, + MZ_ZIP_FLAG_COMPRESSED_DATA = 0x0400, + MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY = 0x0800, + MZ_ZIP_FLAG_VALIDATE_LOCATE_FILE_FLAG = 0x1000, /* if enabled, mz_zip_reader_locate_file() will be called on each file as its validated to ensure the func finds the file in the central dir (intended for testing) */ + MZ_ZIP_FLAG_VALIDATE_HEADERS_ONLY = 0x2000, /* validate the local headers, but don't decompress the entire file and check the crc32 */ + MZ_ZIP_FLAG_WRITE_ZIP64 = 0x4000, /* always use the zip64 file format, instead of the original zip file format with automatic switch to zip64. Use as flags parameter with mz_zip_writer_init*_v2 */ + MZ_ZIP_FLAG_WRITE_ALLOW_READING = 0x8000, + MZ_ZIP_FLAG_ASCII_FILENAME = 0x10000 +} mz_zip_flags; + +typedef enum { + MZ_ZIP_TYPE_INVALID = 0, + MZ_ZIP_TYPE_USER, + MZ_ZIP_TYPE_MEMORY, + MZ_ZIP_TYPE_HEAP, + MZ_ZIP_TYPE_FILE, + MZ_ZIP_TYPE_CFILE, + MZ_ZIP_TOTAL_TYPES +} mz_zip_type; + +/* miniz error codes. Be sure to update mz_zip_get_error_string() if you add or modify this enum. */ +typedef enum { + MZ_ZIP_NO_ERROR = 0, + MZ_ZIP_UNDEFINED_ERROR, + MZ_ZIP_TOO_MANY_FILES, + MZ_ZIP_FILE_TOO_LARGE, + MZ_ZIP_UNSUPPORTED_METHOD, + MZ_ZIP_UNSUPPORTED_ENCRYPTION, + MZ_ZIP_UNSUPPORTED_FEATURE, + MZ_ZIP_FAILED_FINDING_CENTRAL_DIR, + MZ_ZIP_NOT_AN_ARCHIVE, + MZ_ZIP_INVALID_HEADER_OR_CORRUPTED, + MZ_ZIP_UNSUPPORTED_MULTIDISK, + MZ_ZIP_DECOMPRESSION_FAILED, + MZ_ZIP_COMPRESSION_FAILED, + MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE, + MZ_ZIP_CRC_CHECK_FAILED, + MZ_ZIP_UNSUPPORTED_CDIR_SIZE, + MZ_ZIP_ALLOC_FAILED, + MZ_ZIP_FILE_OPEN_FAILED, + MZ_ZIP_FILE_CREATE_FAILED, + MZ_ZIP_FILE_WRITE_FAILED, + MZ_ZIP_FILE_READ_FAILED, + MZ_ZIP_FILE_CLOSE_FAILED, + MZ_ZIP_FILE_SEEK_FAILED, + MZ_ZIP_FILE_STAT_FAILED, + MZ_ZIP_INVALID_PARAMETER, + MZ_ZIP_INVALID_FILENAME, + MZ_ZIP_BUF_TOO_SMALL, + MZ_ZIP_INTERNAL_ERROR, + MZ_ZIP_FILE_NOT_FOUND, + MZ_ZIP_ARCHIVE_TOO_LARGE, + MZ_ZIP_VALIDATION_FAILED, + MZ_ZIP_WRITE_CALLBACK_FAILED, + MZ_ZIP_TOTAL_ERRORS +} mz_zip_error; + +typedef struct +{ + mz_uint64 m_archive_size; + mz_uint64 m_central_directory_file_ofs; + + /* We only support up to UINT32_MAX files in zip64 mode. */ + mz_uint32 m_total_files; + mz_zip_mode m_zip_mode; + mz_zip_type m_zip_type; + mz_zip_error m_last_error; + + mz_uint64 m_file_offset_alignment; + + mz_alloc_func m_pAlloc; + mz_free_func m_pFree; + mz_realloc_func m_pRealloc; + void *m_pAlloc_opaque; + + mz_file_read_func m_pRead; + mz_file_write_func m_pWrite; + mz_file_needs_keepalive m_pNeeds_keepalive; + void *m_pIO_opaque; + + mz_zip_internal_state *m_pState; + +} mz_zip_archive; + +typedef struct +{ + mz_zip_archive *pZip; + mz_uint flags; + + int status; +#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS + mz_uint file_crc32; +#endif + mz_uint64 read_buf_size, read_buf_ofs, read_buf_avail, comp_remaining, out_buf_ofs, cur_file_ofs; + mz_zip_archive_file_stat file_stat; + void *pRead_buf; + void *pWrite_buf; + + size_t out_blk_remain; + + tinfl_decompressor inflator; + +} mz_zip_reader_extract_iter_state; + +/* -------- ZIP reading */ + +/* Inits a ZIP archive reader. */ +/* These functions read and validate the archive's central directory. */ +mz_bool mz_zip_reader_init(mz_zip_archive *pZip, mz_uint64 size, mz_uint flags); + +mz_bool mz_zip_reader_init_mem(mz_zip_archive *pZip, const void *pMem, size_t size, mz_uint flags); + +#ifndef MINIZ_NO_STDIO +/* Read a archive from a disk file. */ +/* file_start_ofs is the file offset where the archive actually begins, or 0. */ +/* actual_archive_size is the true total size of the archive, which may be smaller than the file's actual size on disk. If zero the entire file is treated as the archive. */ +mz_bool mz_zip_reader_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint32 flags); +mz_bool mz_zip_reader_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags, mz_uint64 file_start_ofs, mz_uint64 archive_size); + +/* Read an archive from an already opened FILE, beginning at the current file position. */ +/* The archive is assumed to be archive_size bytes long. If archive_size is < 0, then the entire rest of the file is assumed to contain the archive. */ +/* The FILE will NOT be closed when mz_zip_reader_end() is called. */ +mz_bool mz_zip_reader_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint64 archive_size, mz_uint flags); +#endif + +/* Ends archive reading, freeing all allocations, and closing the input archive file if mz_zip_reader_init_file() was used. */ +mz_bool mz_zip_reader_end(mz_zip_archive *pZip); + +/* -------- ZIP reading or writing */ + +/* Clears a mz_zip_archive struct to all zeros. */ +/* Important: This must be done before passing the struct to any mz_zip functions. */ +void mz_zip_zero_struct(mz_zip_archive *pZip); + +mz_zip_mode mz_zip_get_mode(mz_zip_archive *pZip); +mz_zip_type mz_zip_get_type(mz_zip_archive *pZip); + +/* Returns the total number of files in the archive. */ +mz_uint mz_zip_reader_get_num_files(mz_zip_archive *pZip); + +mz_uint64 mz_zip_get_archive_size(mz_zip_archive *pZip); +mz_uint64 mz_zip_get_archive_file_start_offset(mz_zip_archive *pZip); +MZ_FILE *mz_zip_get_cfile(mz_zip_archive *pZip); + +/* Reads n bytes of raw archive data, starting at file offset file_ofs, to pBuf. */ +size_t mz_zip_read_archive_data(mz_zip_archive *pZip, mz_uint64 file_ofs, void *pBuf, size_t n); + +/* All mz_zip funcs set the m_last_error field in the mz_zip_archive struct. These functions retrieve/manipulate this field. */ +/* Note that the m_last_error functionality is not thread safe. */ +mz_zip_error mz_zip_set_last_error(mz_zip_archive *pZip, mz_zip_error err_num); +mz_zip_error mz_zip_peek_last_error(mz_zip_archive *pZip); +mz_zip_error mz_zip_clear_last_error(mz_zip_archive *pZip); +mz_zip_error mz_zip_get_last_error(mz_zip_archive *pZip); +const char *mz_zip_get_error_string(mz_zip_error mz_err); + +/* MZ_TRUE if the archive file entry is a directory entry. */ +mz_bool mz_zip_reader_is_file_a_directory(mz_zip_archive *pZip, mz_uint file_index); + +/* MZ_TRUE if the file is encrypted/strong encrypted. */ +mz_bool mz_zip_reader_is_file_encrypted(mz_zip_archive *pZip, mz_uint file_index); + +/* MZ_TRUE if the compression method is supported, and the file is not encrypted, and the file is not a compressed patch file. */ +mz_bool mz_zip_reader_is_file_supported(mz_zip_archive *pZip, mz_uint file_index); + +/* Retrieves the filename of an archive file entry. */ +/* Returns the number of bytes written to pFilename, or if filename_buf_size is 0 this function returns the number of bytes needed to fully store the filename. */ +mz_uint mz_zip_reader_get_filename(mz_zip_archive *pZip, mz_uint file_index, char *pFilename, mz_uint filename_buf_size); + +/* Attempts to locates a file in the archive's central directory. */ +/* Valid flags: MZ_ZIP_FLAG_CASE_SENSITIVE, MZ_ZIP_FLAG_IGNORE_PATH */ +/* Returns -1 if the file cannot be found. */ +int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags); +int mz_zip_reader_locate_file_v2(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags, mz_uint32 *file_index); + +/* Returns detailed information about an archive file entry. */ +mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index, mz_zip_archive_file_stat *pStat); + +/* MZ_TRUE if the file is in zip64 format. */ +/* A file is considered zip64 if it contained a zip64 end of central directory marker, or if it contained any zip64 extended file information fields in the central directory. */ +mz_bool mz_zip_is_zip64(mz_zip_archive *pZip); + +/* Returns the total central directory size in bytes. */ +/* The current max supported size is <= MZ_UINT32_MAX. */ +size_t mz_zip_get_central_dir_size(mz_zip_archive *pZip); + +/* Extracts a archive file to a memory buffer using no memory allocation. */ +/* There must be at least enough room on the stack to store the inflator's state (~34KB or so). */ +mz_bool mz_zip_reader_extract_to_mem_no_alloc(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size); +mz_bool mz_zip_reader_extract_file_to_mem_no_alloc(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size); + +/* Extracts a archive file to a memory buffer. */ +mz_bool mz_zip_reader_extract_to_mem(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags); +mz_bool mz_zip_reader_extract_file_to_mem(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags); + +/* Extracts a archive file to a dynamically allocated heap buffer. */ +/* The memory will be allocated via the mz_zip_archive's alloc/realloc functions. */ +/* Returns NULL and sets the last error on failure. */ +void *mz_zip_reader_extract_to_heap(mz_zip_archive *pZip, mz_uint file_index, size_t *pSize, mz_uint flags); +void *mz_zip_reader_extract_file_to_heap(mz_zip_archive *pZip, const char *pFilename, size_t *pSize, mz_uint flags); + +/* Extracts a archive file using a callback function to output the file's data. */ +mz_bool mz_zip_reader_extract_to_callback(mz_zip_archive *pZip, mz_uint file_index, mz_file_write_func pCallback, void *pOpaque, mz_uint flags); +mz_bool mz_zip_reader_extract_file_to_callback(mz_zip_archive *pZip, const char *pFilename, mz_file_write_func pCallback, void *pOpaque, mz_uint flags); + +/* Extract a file iteratively */ +mz_zip_reader_extract_iter_state* mz_zip_reader_extract_iter_new(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags); +mz_zip_reader_extract_iter_state* mz_zip_reader_extract_file_iter_new(mz_zip_archive *pZip, const char *pFilename, mz_uint flags); +size_t mz_zip_reader_extract_iter_read(mz_zip_reader_extract_iter_state* pState, void* pvBuf, size_t buf_size); +mz_bool mz_zip_reader_extract_iter_free(mz_zip_reader_extract_iter_state* pState); + +#ifndef MINIZ_NO_STDIO +/* Extracts a archive file to a disk file and sets its last accessed and modified times. */ +/* This function only extracts files, not archive directory records. */ +mz_bool mz_zip_reader_extract_to_file(mz_zip_archive *pZip, mz_uint file_index, const char *pDst_filename, mz_uint flags); +mz_bool mz_zip_reader_extract_file_to_file(mz_zip_archive *pZip, const char *pArchive_filename, const char *pDst_filename, mz_uint flags); + +/* Extracts a archive file starting at the current position in the destination FILE stream. */ +mz_bool mz_zip_reader_extract_to_cfile(mz_zip_archive *pZip, mz_uint file_index, MZ_FILE *File, mz_uint flags); +mz_bool mz_zip_reader_extract_file_to_cfile(mz_zip_archive *pZip, const char *pArchive_filename, MZ_FILE *pFile, mz_uint flags); +#endif + +#if 0 +/* TODO */ + typedef void *mz_zip_streaming_extract_state_ptr; + mz_zip_streaming_extract_state_ptr mz_zip_streaming_extract_begin(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags); + uint64_t mz_zip_streaming_extract_get_size(mz_zip_archive *pZip, mz_zip_streaming_extract_state_ptr pState); + uint64_t mz_zip_streaming_extract_get_cur_ofs(mz_zip_archive *pZip, mz_zip_streaming_extract_state_ptr pState); + mz_bool mz_zip_streaming_extract_seek(mz_zip_archive *pZip, mz_zip_streaming_extract_state_ptr pState, uint64_t new_ofs); + size_t mz_zip_streaming_extract_read(mz_zip_archive *pZip, mz_zip_streaming_extract_state_ptr pState, void *pBuf, size_t buf_size); + mz_bool mz_zip_streaming_extract_end(mz_zip_archive *pZip, mz_zip_streaming_extract_state_ptr pState); +#endif + +/* This function compares the archive's local headers, the optional local zip64 extended information block, and the optional descriptor following the compressed data vs. the data in the central directory. */ +/* It also validates that each file can be successfully uncompressed unless the MZ_ZIP_FLAG_VALIDATE_HEADERS_ONLY is specified. */ +mz_bool mz_zip_validate_file(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags); + +/* Validates an entire archive by calling mz_zip_validate_file() on each file. */ +mz_bool mz_zip_validate_archive(mz_zip_archive *pZip, mz_uint flags); + +/* Misc utils/helpers, valid for ZIP reading or writing */ +mz_bool mz_zip_validate_mem_archive(const void *pMem, size_t size, mz_uint flags, mz_zip_error *pErr); +mz_bool mz_zip_validate_file_archive(const char *pFilename, mz_uint flags, mz_zip_error *pErr); + +/* Universal end function - calls either mz_zip_reader_end() or mz_zip_writer_end(). */ +mz_bool mz_zip_end(mz_zip_archive *pZip); + +/* -------- ZIP writing */ + +#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS + +/* Inits a ZIP archive writer. */ +/*Set pZip->m_pWrite (and pZip->m_pIO_opaque) before calling mz_zip_writer_init or mz_zip_writer_init_v2*/ +/*The output is streamable, i.e. file_ofs in mz_file_write_func always increases only by n*/ +mz_bool mz_zip_writer_init(mz_zip_archive *pZip, mz_uint64 existing_size); +mz_bool mz_zip_writer_init_v2(mz_zip_archive *pZip, mz_uint64 existing_size, mz_uint flags); + +mz_bool mz_zip_writer_init_heap(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size); +mz_bool mz_zip_writer_init_heap_v2(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size, mz_uint flags); + +#ifndef MINIZ_NO_STDIO +mz_bool mz_zip_writer_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning); +mz_bool mz_zip_writer_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning, mz_uint flags); +mz_bool mz_zip_writer_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint flags); +#endif + +/* Converts a ZIP archive reader object into a writer object, to allow efficient in-place file appends to occur on an existing archive. */ +/* For archives opened using mz_zip_reader_init_file, pFilename must be the archive's filename so it can be reopened for writing. If the file can't be reopened, mz_zip_reader_end() will be called. */ +/* For archives opened using mz_zip_reader_init_mem, the memory block must be growable using the realloc callback (which defaults to realloc unless you've overridden it). */ +/* Finally, for archives opened using mz_zip_reader_init, the mz_zip_archive's user provided m_pWrite function cannot be NULL. */ +/* Note: In-place archive modification is not recommended unless you know what you're doing, because if execution stops or something goes wrong before */ +/* the archive is finalized the file's central directory will be hosed. */ +mz_bool mz_zip_writer_init_from_reader(mz_zip_archive *pZip, const char *pFilename); +mz_bool mz_zip_writer_init_from_reader_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags); + +/* Adds the contents of a memory buffer to an archive. These functions record the current local time into the archive. */ +/* To add a directory entry, call this method with an archive name ending in a forwardslash with an empty buffer. */ +/* level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION. */ +mz_bool mz_zip_writer_add_mem(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, mz_uint level_and_flags); + +/* Like mz_zip_writer_add_mem(), except you can specify a file comment field, and optionally supply the function with already compressed data. */ +/* uncomp_size/uncomp_crc32 are only used if the MZ_ZIP_FLAG_COMPRESSED_DATA flag is specified. */ +mz_bool mz_zip_writer_add_mem_ex(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, + mz_uint64 uncomp_size, mz_uint32 uncomp_crc32); + +mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, + mz_uint64 uncomp_size, mz_uint32 uncomp_crc32, MZ_TIME_T *last_modified, const char *user_extra_data_local, mz_uint user_extra_data_local_len, + const char *user_extra_data_central, mz_uint user_extra_data_central_len); + +/* Adds the contents of a file to an archive. This function also records the disk file's modified time into the archive. */ +/* File data is supplied via a read callback function. User mz_zip_writer_add_(c)file to add a file directly.*/ +mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pArchive_name, mz_file_read_func read_callback, void* callback_opaque, mz_uint64 size_to_add, + const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, const char *user_extra_data_local, mz_uint user_extra_data_local_len, + const char *user_extra_data_central, mz_uint user_extra_data_central_len); + +#ifndef MINIZ_NO_STDIO +/* Adds the contents of a disk file to an archive. This function also records the disk file's modified time into the archive. */ +/* level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION. */ +mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags); + +/* Like mz_zip_writer_add_file(), except the file data is read from the specified FILE stream. */ +mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, mz_uint64 size_to_add, + const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, const char *user_extra_data_local, mz_uint user_extra_data_local_len, + const char *user_extra_data_central, mz_uint user_extra_data_central_len); +#endif + +/* Adds a file to an archive by fully cloning the data from another archive. */ +/* This function fully clones the source file's compressed data (no recompression), along with its full filename, extra data (it may add or modify the zip64 local header extra data field), and the optional descriptor following the compressed data. */ +mz_bool mz_zip_writer_add_from_zip_reader(mz_zip_archive *pZip, mz_zip_archive *pSource_zip, mz_uint src_file_index); + +/* Finalizes the archive by writing the central directory records followed by the end of central directory record. */ +/* After an archive is finalized, the only valid call on the mz_zip_archive struct is mz_zip_writer_end(). */ +/* An archive must be manually finalized by calling this function for it to be valid. */ +mz_bool mz_zip_writer_finalize_archive(mz_zip_archive *pZip); + +/* Finalizes a heap archive, returning a poiner to the heap block and its size. */ +/* The heap block will be allocated using the mz_zip_archive's alloc/realloc callbacks. */ +mz_bool mz_zip_writer_finalize_heap_archive(mz_zip_archive *pZip, void **ppBuf, size_t *pSize); + +/* Ends archive writing, freeing all allocations, and closing the output file if mz_zip_writer_init_file() was used. */ +/* Note for the archive to be valid, it *must* have been finalized before ending (this function will not do it for you). */ +mz_bool mz_zip_writer_end(mz_zip_archive *pZip); + +/* -------- Misc. high-level helper functions: */ + +/* mz_zip_add_mem_to_archive_file_in_place() efficiently (but not atomically) appends a memory blob to a ZIP archive. */ +/* Note this is NOT a fully safe operation. If it crashes or dies in some way your archive can be left in a screwed up state (without a central directory). */ +/* level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION. */ +/* TODO: Perhaps add an option to leave the existing central dir in place in case the add dies? We could then truncate the file (so the old central dir would be at the end) if something goes wrong. */ +mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags); +mz_bool mz_zip_add_mem_to_archive_file_in_place_v2(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, mz_zip_error *pErr); + +/* Reads a single file from an archive into a heap block. */ +/* If pComment is not NULL, only the file with the specified comment will be extracted. */ +/* Returns NULL on failure. */ +void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, size_t *pSize, mz_uint flags); +void *mz_zip_extract_archive_file_to_heap_v2(const char *pZip_filename, const char *pArchive_name, const char *pComment, size_t *pSize, mz_uint flags, mz_zip_error *pErr); + +#endif /* #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS */ + +#ifdef __cplusplus +} +#endif + +#endif /* MINIZ_NO_ARCHIVE_APIS */