Gnulib contains modules like dtoastr that accurately convert floating point numbers to strings. For the opposite direction of conversion, Gnulib offers strtod replacements, but these refer to conversion routines of the host systems and may lack the accuracy described in Clinger's well-known paper [1] IIUC.
Wouldn't it make sense to include an accurate conversion algorithm in Gnulib like [2] with the small improvement from [3]? Maybe code from glibc can be reused. Let me also mention what I feel is an inconvenience of the standard C library functions: they mix parsing/composing the strings with the actual conversion routines. Routines that take the sign, the (integer) mantissa, and the exponent separately (or return them separately) are more fundamental. They can help when the external string format is not the same as C's. Please excuse me if Gnulib already has this functionality. In this case, I have overlooked it. Thanks, Marc -- [1] https://dl.acm.org/doi/pdf/10.1145/93548.93557 [2] https://arxiv.org/pdf/2101.11408 [3] https://onlinelibrary.wiley.com/doi/10.1002/spe.3198
