dist/nvi/clib/strpbrk.c

   1 /*      $NetBSD$ */
   2
   3 /*
   4  * Copyright (c) 1985, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "config.h"
  37
  38 #if defined(LIBC_SCCS) && !defined(lint)
  39 static const char sccsid[] = "@(#)strpbrk.c     8.1 (Berkeley) 6/4/93";
  40 #endif /* LIBC_SCCS and not lint */
  41
  42 #include <string.h>
  43
  44 /*
  45  * Find the first occurrence in s1 of a character in s2 (excluding NUL).
  46  *
  47  * PUBLIC: #ifndef HAVE_STRPBRK
  48  * PUBLIC: char *strpbrk __P((const char *, const char *));
  49  * PUBLIC: #endif
  50  */
  51 char *
  52 strpbrk(register const char *s1, register const char *s2)
  53 {
  54         register const char *scanp;
  55         register int c, sc;
  56
  57         while ((c = *s1++) != 0) {
  58                 for (scanp = s2; (sc = *scanp++) != 0;)
  59                         if (sc == c)
  60                                 return ((char *)(s1 - 1));
  61         }
  62         return (NULL);
  63 }