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10.51 atof

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/atof.html

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• This function is missing on some platforms: Android 4.4.
• This function mis-parses strings with leading ‘+’ on some old platforms: Old versions of Linux.
• This function returns a positive value for negative underflow on some platforms: glibc 2.4, Mingw, Cygwin.
• This function fails to do a valid parse of ‘-0x’ on some platforms: glibc 2.4, Cygwin < 1.5.25-11.
• This function fails to parse Infinities and plain NaNs on some platforms: Mingw, OpenBSD 4.0.
• This function fails to parse NaN() on some platforms: Mingw, OpenBSD 4.0, Cygwin < 1.5.25-11.
• This function fails to parse NaN(n-char-sequence) on some platforms: Mingw, OpenBSD 4.0.
• This function fails to parse C99 hexadecimal floating point on some platforms: Mingw, OpenBSD 4.0.
• This function fails to correctly parse very long strings on some platforms: Mingw, Cygwin.