compat_strsep.c

   1 #include "config.h"
   2
   3 #if HAVE_STRSEP
   4
   5 int dummy;
   6
   7 #else
   8
   9 /*      $Id: compat_strsep.c,v 1.4 2014/12/11 09:05:01 schwarze Exp $   */
  10 /*      $OpenBSD: strsep.c,v 1.7 2014/02/05 20:42:32 stsp Exp $ */
  11
  12 /*-
  13  * Copyright (c) 1990, 1993
  14  *      The Regents of the University of California.  All rights reserved.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 /*
  42  * Get next token from string *stringp, where tokens are possibly-empty
  43  * strings separated by characters from delim.
  44  *
  45  * Writes NULs into the string at *stringp to end tokens.
  46  * delim need not remain constant from call to call.
  47  * On return, *stringp points past the last NUL written (if there might
  48  * be further tokens), or is NULL (if there are definitely no more tokens).
  49  *
  50  * If *stringp is NULL, strsep returns NULL.
  51  */
  52 char *
  53 strsep(char **stringp, const char *delim)
  54 {
  55         char *s;
  56         const char *spanp;
  57         int c, sc;
  58         char *tok;
  59
  60         if ((s = *stringp) == NULL)
  61                 return (NULL);
  62         for (tok = s;;) {
  63                 c = *s++;
  64                 spanp = delim;
  65                 do {
  66                         if ((sc = *spanp++) == c) {
  67                                 if (c == 0)
  68                                         s = NULL;
  69                                 else
  70                                         s[-1] = 0;
  71                                 *stringp = s;
  72                                 return (tok);
  73                         }
  74                 } while (sc != 0);
  75         }
  76         /* NOTREACHED */
  77 }
  78
  79 #endif