FxLibcTest/src/ctype/convert.c

#include <ft/test.h>
#include <ft/all-tests.h>
#include <ctype.h>

static void _ctype_conversion(ft_test *t)
{
	for(int c = 0; c < 128; c++) {
		int cl_f = (isupper(c) ? c - 'A' + 'a' : c);
		int cu_f = (islower(c) ? c - 'a' + 'A' : c);

		#undef tolower
		#undef toupper

		int cl_m = (isupper(c) ? c - 'A' + 'a' : c);
		int cu_m = (islower(c) ? c - 'a' + 'A' : c);

		ft_assert(t, tolower(c) == cl_f && toupper(c) == cu_f
			&& tolower(c) == cl_m && toupper(c) == cu_m);
	}
}

ft_test ft_ctype_conversion = {
	.name = "Case conversion",
	.function = _ctype_conversion,
};