ref: 321d79d6f2f158bf005366a5c5f1756a58dca25d
dir: /lib/c/memcmp.c/
#include <string.h>
#undef memcmp
int
memcmp(const void *s1, const void *s2, size_t n)
{
const unsigned char *s = (unsigned char *) s1;
const unsigned char *t = (unsigned char *) s2;
for ( ; n > 0 && *s++ == *t++; --n)
;
return n ? (*s - *t) : 0;
}