Remove workaround for old issue with a particular double (#751)

Author: pjfanning

release-notes/VERSION-2.x

@@ -23,6 +23,8 @@ JSON library.
 #733: Add `StreamReadCapability.EXACT_FLOATS` to indicate whether parser reports exact
   floating-point values or not
  (contributed Doug R)
+#751: Remove workaround for old issue with a particular double
+ (contributed by @pjfanning)
 
 2.13.3 (not yet released)
 

src/main/java/com/fasterxml/jackson/core/io/NumberInput.java

@@ -4,12 +4,6 @@
 
 public final class NumberInput
 {
-    /**
-     * Textual representation of a double constant that can cause nasty problems
-     * with JDK (see http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308).
-     */
-    public final static String NASTY_SMALL_DOUBLE = "2.2250738585072012e-308";
-
     /**
      * Constants needed for parsing longs from basic int parsing methods
      */
@@ -300,13 +294,6 @@ public static double parseAsDouble(String s, double def)
     }
 
     public static double parseDouble(String s) throws NumberFormatException {
-        // [JACKSON-486]: avoid some nasty float representations... but should it be MIN_NORMAL or MIN_VALUE?
-        /* as per [JACKSON-827], let's use MIN_VALUE as it is available on all JDKs; normalized
-         * only in JDK 1.6. In practice, should not really matter.
-         */
-        if (NASTY_SMALL_DOUBLE.equals(s)) {
-            return Double.MIN_VALUE;
-        }
         return Double.parseDouble(s);
     }
 

src/test/java/com/fasterxml/jackson/core/io/TestNumberInput.java

@@ -0,0 +1,14 @@
+package com.fasterxml.jackson.core.io;
+
+public class TestNumberInput
+    extends com.fasterxml.jackson.core.BaseTest
+{
+    public void testNastySmallDouble()
+    {
+        //relates to https://github.com/FasterXML/jackson-core/issues/750
+        //prior to jackson v2.14, this value used to be returned as Double.MIN_VALUE
+        final String nastySmallDouble = "2.2250738585072012e-308";
+        assertEquals(Double.parseDouble(nastySmallDouble), NumberInput.parseDouble(nastySmallDouble));
+    }
+}
+