/*
 * strncasecmp() - Compare the first n characters of two strings
 * (or the entire string if the limit is greater than the total
 * string length) case-insensitively.
 *
 * Dan Cross <net!gajendra!cross>
 */

#include <ctype.h>
#include <stddef.h>
#include <string.h>

int
strncasecmp(const char *s1, const char *s2, size_t len)
{
	int c1, c2;
	char *a, *b;

	c1 = c2 = 0;
	a = (char *)s1;
	b = (char *)s2;
	while (len-- > 0) {
		c1 = (isascii(*a) && islower(*a)) ? *a : tolower(*a);
		c2 = (isascii(*b) && islower(*b)) ? *b : tolower(*b);
		if (c1 == '\0' || c2 == '\0' || c1 != c2)
			break;
		a++;
		b++;
	}

	return((c1 == c2) ? 0 : (c1 < c2) ? -1 : 1);
}

int
strcasecmp(const char *s1, const char *s2)
{
	return(strncasecmp(s1, s2, strlen(s1) + 1));	/* Include nul. */
}