1 #include <u.h>
2 #include <libc.h>
3 
4 int
5 cistrcmp(char *s1, char *s2)
6 {
7 	int c1, c2;
8 
9 	while(*s1){
10 		c1 = *(uchar*)s1++;
11 		c2 = *(uchar*)s2++;
12 
13 		if(c1 == c2)
14 			continue;
15 
16 		if(c1 >= 'A' && c1 <= 'Z')
17 			c1 -= 'A' - 'a';
18 
19 		if(c2 >= 'A' && c2 <= 'Z')
20 			c2 -= 'A' - 'a';
21 
22 		if(c1 != c2)
23 			return c1 - c2;
24 	}
25 	return -*s2;
26 }