1 fd04aace 2003-11-23 devnull #include <u.h>
 2 fd04aace 2003-11-23 devnull #include <libc.h>
 3 fd04aace 2003-11-23 devnull 
 4 fd04aace 2003-11-23 devnull char*
 5 fd04aace 2003-11-23 devnull cistrstr(char *s, char *sub)
 6 fd04aace 2003-11-23 devnull {
 7 fd04aace 2003-11-23 devnull 	int c, csub, n;
 8 fd04aace 2003-11-23 devnull 
 9 fd04aace 2003-11-23 devnull 	csub = *sub;
10 fd04aace 2003-11-23 devnull 	if(csub == '\0')
11 fd04aace 2003-11-23 devnull 		return s;
12 fd04aace 2003-11-23 devnull 	if(csub >= 'A' && csub <= 'Z')
13 fd04aace 2003-11-23 devnull 		csub -= 'A' - 'a';
14 fd04aace 2003-11-23 devnull 	sub++;
15 fd04aace 2003-11-23 devnull 	n = strlen(sub);
16 fd04aace 2003-11-23 devnull 	for(; c = *s; s++){
17 fd04aace 2003-11-23 devnull 		if(c >= 'A' && c <= 'Z')
18 fd04aace 2003-11-23 devnull 			c -= 'A' - 'a';
19 fd04aace 2003-11-23 devnull 		if(c == csub && cistrncmp(s+1, sub, n) == 0)
20 fd04aace 2003-11-23 devnull 			return s;
21 fd04aace 2003-11-23 devnull 	}
22 fd04aace 2003-11-23 devnull 	return nil;
23 fd04aace 2003-11-23 devnull }