scc

 1#include <wchar.h>
 2
 3#undef wcsncmp
 4
 5int
 6wcsncmp(const wchar_t *s1, const wchar_t *s2, size_t n)
 7{
 8	unsigned long l1, l2;
 9
10	for ( ; n > 0 && *s1 == *s2; --n)
11		++s1, ++s2;
12
13	if (n == 0)
14		return 0;
15	l1 = *s1, l2 = *s2;
16
17	return l1 - l2;
18}