ref: 0665b2980f119a119f4c158a7d82267c640f953f
dir: /lib/c/src/strncmp.c/
#include <string.h>
#undef strncmp
int
strncmp(const char *s1, const char *s2, size_t n)
{
for (; n && *s1 && *s2 && *s1 == *s2; --n, ++s1, ++s2);
/* nothing */;
return n ? (*(unsigned char *)s1 - *(unsigned char *)s2) : 0;
}