/* memcmp function */
#include <string.h>

int (memcmp)(const void *s1, const void *s2, size_t n)
	{	/* compare unsigned char s1[n], s2[n] */
	const unsigned char *su1 = (const unsigned char *)s1;
	const unsigned char *su2 = (const unsigned char *)s2;

	for (; 0 < n; ++su1, ++su2, --n)
		if (*su1 != *su2)
			return ((*su1 < *su2) ? -1 : +1);
	return (0);
	}

