Clarify roles of the two implementations

[jeaiii]

Clarify roles of the two implementations

[jeaiii]

Awesome, glad it helped!

The api for itoa_jeaiii.cpp matches that used by the benchmark project and assumes a big enough input buffer like the non-standard itoa() function. to_chars.cpp is written to make implementing std::to_chars easy and has a safer api. to_chars.cpp is the one to use if you want future improvements.

[ColinH]

Thanks, then, for now, we used the more appropriate version, though it required a couple of changes to be integrated into our header-only C++ library.