I have a library which needs to parse double numbers which always use a point '.' as decimal separator. Unfortunately for this case, strtod() respects the locale which might use a different separator and thus parsing can fail. I can't setlocale() - it isn't thread-safe. So I'm searching for a clean locale-independent strtod implementation now. I have found multiple implementations so far, but all of them look hacky or just like bad code. Can someone recommend a well-tested, working, clean (ANSI) C implementation for me?
Grab some known implementation (that doesn't depend on atof), such as the one distributed with ruby:
ruby_1_8/missing/strtod.c.