gen/strchr.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1992, 1995 NeXT Computer, Inc.  All rights reserved.
  23  *
  24  *      File:   libc/gen/strchr.c
  25  *
  26  *      This file contains machine independent code for string index
  27  *
  28  */
  29 #import <string.h>
  30
  31 /* This routine needs to be optimized. */
  32
  33 char *strchr(const char *s, int c)
  34 {
  35     const char ch = c;
  36
  37     for ( ; *s != ch; s++)
  38         if (*s == '\0')
  39             return 0;
  40     return (char *)s;
  41 }