xref: /plan9/sys/src/ape/lib/utf/runestrncmp.c (revision 40ef9009116dd37656783aaadc8782c1d8bfb056)
1*40ef9009SDavid du Colombier /*
2*40ef9009SDavid du Colombier  * The authors of this software are Rob Pike and Ken Thompson.
3*40ef9009SDavid du Colombier  *              Copyright (c) 2002 by Lucent Technologies.
4*40ef9009SDavid du Colombier  * Permission to use, copy, modify, and distribute this software for any
5*40ef9009SDavid du Colombier  * purpose without fee is hereby granted, provided that this entire notice
6*40ef9009SDavid du Colombier  * is included in all copies of any software which is or includes a copy
7*40ef9009SDavid du Colombier  * or modification of this software and in all copies of the supporting
8*40ef9009SDavid du Colombier  * documentation for such software.
9*40ef9009SDavid du Colombier  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10*40ef9009SDavid du Colombier  * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
11*40ef9009SDavid du Colombier  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12*40ef9009SDavid du Colombier  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13*40ef9009SDavid du Colombier  */
14*40ef9009SDavid du Colombier #include <stdarg.h>
15*40ef9009SDavid du Colombier #include <string.h>
16*40ef9009SDavid du Colombier #include "utf.h"
17*40ef9009SDavid du Colombier #include "utfdef.h"
18*40ef9009SDavid du Colombier 
19*40ef9009SDavid du Colombier int
runestrncmp(Rune * s1,Rune * s2,long n)20*40ef9009SDavid du Colombier runestrncmp(Rune *s1, Rune *s2, long n)
21*40ef9009SDavid du Colombier {
22*40ef9009SDavid du Colombier 	Rune c1, c2;
23*40ef9009SDavid du Colombier 
24*40ef9009SDavid du Colombier 	while(n > 0) {
25*40ef9009SDavid du Colombier 		c1 = *s1++;
26*40ef9009SDavid du Colombier 		c2 = *s2++;
27*40ef9009SDavid du Colombier 		n--;
28*40ef9009SDavid du Colombier 		if(c1 != c2) {
29*40ef9009SDavid du Colombier 			if(c1 > c2)
30*40ef9009SDavid du Colombier 				return 1;
31*40ef9009SDavid du Colombier 			return -1;
32*40ef9009SDavid du Colombier 		}
33*40ef9009SDavid du Colombier 		if(c1 == 0)
34*40ef9009SDavid du Colombier 			break;
35*40ef9009SDavid du Colombier 	}
36*40ef9009SDavid du Colombier 	return 0;
37*40ef9009SDavid du Colombier }
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