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10.46.70 strtoul ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/strtoul.html

Gnulib module: strtoul

Portability problems fixed by Gnulib:

• This function is missing on some old platforms.
• This function does not parse the leading ‘0’ when the input string is "0x" and the base is 16 or 0 on some platforms: Minix 3.3, mingw, MSVC 14.
• This function does not parse binary integers (with a ‘0b’ or ‘0B’ prefix) when the base is 2 or 0 on many platforms.

Portability problems not fixed by Gnulib:

• 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.