bcmath functions to support scientific notation numbers

[edoniti]

Description

I occurred a problem with bcmath functions, bcadd, bcround specifically, where they do not support scientific notation numbers, for example 2.3314683517128E-14.

A solution that I found online was to use as bcround(sprintf("%.20f", (float)$rest['nett']), 9), but it is a bit hard to do that everywhere.

Wouldn't it be more logical for bc* functions to support 2.3314683517128E-14 since they support 0.0000000000000023314683517128 for example

[gzhegow1991]

Isn't it possible to create your own number using bcpow('number', 'pow_value') instead of sprintf converting from float?

[SakiTakamachi]

I think this is a sensible idea.

However, I am currently testing whether this can actually be achieved without sacrificing performance.

Either way, this should be discussed on the internal mailing list.

[SakiTakamachi]

I created a prototype.

#18068

Once I've polished the code a bit more, I'll propose it to the mailing list.