1/*
2 * strcmp.c
3 */
4
5#include <string.h>
6
7int strcmp(const char *s1, const char *s2)
8{
9    const unsigned char *c1 = (const unsigned char *)s1;
10    const unsigned char *c2 = (const unsigned char *)s2;
11    unsigned char ch;
12    int d = 0;
13
14    while (1) {
15	d = (int)(ch = *c1++) - (int)*c2++;
16	if (d || !ch)
17	    break;
18    }
19
20    return d;
21}
22