runestrchr.c (1012B) download
1/*
2 * The authors of this software are Rob Pike and Ken Thompson.
3 * Copyright (c) 2002 by Lucent Technologies.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose without fee is hereby granted, provided that this entire notice
6 * is included in all copies of any software which is or includes a copy
7 * or modification of this software and in all copies of the supporting
8 * documentation for such software.
9 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10 * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
11 * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13 */
14#include "plan9.h"
15#include "utf.h"
16
17#include <stdarg.h>
18#include <string.h>
19
20Rune* runestrchr(Rune* s, Rune c) {
21 Rune c0 = c;
22 Rune c1;
23
24 if (c == 0) {
25 while (*s++)
26 ;
27 return s - 1;
28 }
29
30 while ((c1 = *s++))
31 if (c1 == c0)
32 return s - 1;
33 return 0;
34}