ref: c863f70762d5c00224431259e92b0eb5114b2b61
dir: /src/libc/string/strncmp.c/
#include <string.h>
#undef strncmp
int
strncmp(const char *s1, const char *s2, size_t n)
{
for ( ; n > 0 && *s1 == *s2; --n)
++s1, ++s2;
if (n == 0)
return 0;
return *(unsigned char *) s1 - *(unsigned char *) s2;
}