ref: ae0d87a19f53e5e8690e4a41536b5a825a3d9787
dir: /src/libc/string/memcmp.c/
#include <string.h>
#undef memcmp
int
memcmp(const void *s1, const void *s2, size_t n)
{
const unsigned char *s = s1;
const unsigned char *t = s2;
for (; n > 0 && *s == *t; --n)
++s, ++t;
return (n > 0) ? *s - *t : 0;
}