The function c32srtombs is like wcsrtombs, except that it takes a string of
char32_t characters instead of wchar_t characters as input.


2020-01-09  Bruno Haible  <bruno@clisp.org>

	c32srtombs: Add tests.
	* tests/test-c32srtombs.c: New file, based on tests/test-wcsrtombs.c.
	* tests/test-c32srtombs-1.sh: New file, based on
	tests/test-wcsrtombs1.sh.
	* tests/test-c32srtombs-2.sh: New file, based on
	tests/test-wcsrtombs2.sh.
	* tests/test-c32srtombs-3.sh: New file, based on
	tests/test-wcsrtombs3.sh.
	* tests/test-c32srtombs-4.sh: New file, based on
	tests/test-wcsrtombs4.sh.
	* modules/c32srtombs-tests: New file, based on modules/wcsrtombs-tests.

	c32srtombs: New module.
	* lib/uchar.in.h (c32srtombs): New declaration.
	* lib/wcsrtombs-impl.h: Parameterize: Use macros FUNC, SCHAR_T,
	INTERNAL_STATE, WCRTOMB.
	* lib/wcsrtombs.c (FUNC, SCHAR_T, INTERNAL_STATE, WCRTOMB): New macros.
	* lib/c32srtombs.c: New file.
	* lib/c32srtombs-state.c: New file, based on lib/wcsrtombs-state.c.
	* m4/uchar.m4 (gl_UCHAR_H_DEFAULTS): Initialize GNULIB_C32SRTOMBS.
	* modules/uchar (Makefile.am): Substitute GNULIB_C32SRTOMBS.
	* modules/c32srtombs: New file.
	* tests/test-uchar-c++.cc: Test the signature of c32srtombs.
	* doc/posix-functions/wcsrtombs.texi: Mention the new module.