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10.628 mbstowcs

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

Gnulib module: mbstowcs

Portability problems fixed by Gnulib:

• In the C or POSIX locales, this function can return (size_t) -1 and set errno to EILSEQ: glibc 2.35.

Portability problems not fixed by Gnulib:

• On Windows and 32-bit AIX platforms, wchar_t is a 16-bit type and therefore cannot accommodate all Unicode characters. However, the Gnulib function mbstoc32s, provided by Gnulib module mbstoc32s, operates on 32-bit wide characters and therefore does not have this limitation.