1#include <strings.h>
2#include <ctype.h>
3
4int strncasecmp(const char *_l, const char *_r, size_t n)
5{
6	const unsigned char *l=(void *)_l, *r=(void *)_r;
7	if (!n--) return 0;
8	for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
9	return tolower(*l) - tolower(*r);
10}
11