strtof (GNU Gnulib)

Gnulib module: strtof

Portability problems fixed by Gnulib:

This function is missing on some platforms: NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, Solaris 9, MSVC 9, Android 4.4.
This function returns the wrong end pointer for ‘-0x’ on some platforms: glibc 2.4, Mac OS X 10.5, FreeBSD 6.2.
This function fails to parse ‘NaN()’ on some platforms: glibc 2.5, FreeBSD 6.2.
This function misparses ‘nan(’ on some platforms: macOS 10.6.6.
This function fails to set errno upon overflow on some platforms: mingw 5.0.
This function fails to set errno upon underflow on some platforms: Cygwin 2.9, mingw 5.0.

Portability problems not fixed by Gnulib:

This function returns +0.0 (not −0.0) for negative underflow on some platforms: glibc 2.7, mingw, MSVC 14.
This function cannot distinguish between “nan” and “-nan” on some platforms: glibc 2.7, mingw, MSVC 14.
This function fails to correctly parse very long strings on some platforms: Mac OS X 10.5, FreeBSD 6.2, NetBSD 5.0, Cygwin, mingw, MSVC 14.
This function fails to set errno upon gradual underflow (resulting in a denormalized number) on some platforms: MSVC 14.
The replacement function does not always return correctly rounded results.
If no conversion could be performed, this function sets errno to EINVAL on some platforms. Portable programs should check for no conversion by comparing str to *endptr, not by inspecting errno.