path: root/memcasechr.c

/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST


void *
libsimple_memcasechr(const void *s_, int c, size_t n)
{
	char *s = *(char **)(void *)&s_;
	size_t i = 0;
	c = tolower(c);
	for (; i < n && tolower(s[i]) != c; i++);
	return i < n ? &s[i] : NULL;
}


#else
#include "test.h"

int
main(void)
{
	assert(!strcmpnul(libsimple_memcasechr("abcABCabcABC", 'a', sizeof("abcABCabcABC") - 1), "abcABCabcABC"));
	assert(!strcmpnul(libsimple_memcasechr("abcABCabcABC", 'c', sizeof("abcABCabcABC") - 1), "cABCabcABC"));
	assert(!strcmpnul(libsimple_memcasechr("abcABCabcABC", 'A', sizeof("abcABCabcABC") - 1), "abcABCabcABC"));
	assert(!strcmpnul(libsimple_memcasechr("abcABCabcABC", 'C', sizeof("abcABCabcABC") - 1), "cABCabcABC"));
	assert(!strcmpnul(libsimple_memcasechr("ABCabcABCabc", 'a', sizeof("ABCabcABCabc") - 1), "ABCabcABCabc"));
	assert(!strcmpnul(libsimple_memcasechr("ABCabcABCabc", 'c', sizeof("ABCabcABCabc") - 1), "CabcABCabc"));
	assert(!strcmpnul(libsimple_memcasechr("ABCabcABCabc", 'A', sizeof("ABCabcABCabc") - 1), "ABCabcABCabc"));
	assert(!strcmpnul(libsimple_memcasechr("ABCabcABCabc", 'C', sizeof("ABCabcABCabc") - 1), "CabcABCabc"));
	assert(!libsimple_memcasechr("abcABCabcABC", 'x', sizeof("abcABCabcABC") - 1));
	return 0;
}

#endif