towctrans
=========

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

Gnulib module: towctrans

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, HP-UX 11.00, IRIX 6.5, mingw, MSVC 9, Android 7.1.

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 c32_apply_mapping, provided by Gnulib module c32_apply_mapping, operates on 32-bit wide characters and therefore does not have this limitation.