fxlibc/src/string/memrchr.c

#include <string.h>

void *memrchr(void const *_s, int c, size_t n)
{
	char const *s = _s;

	for(int i = n - 1; i >= 0; i--) {
		if(s[i] == c) return (char *)&s[i];
	}

	return NULL;
}