compat_strsep.c

   1 #include "config.h"
   2
   3 #if HAVE_STRSEP
   4
   5 int dummy;
   6
   7 #else
   8
   9 /*      ($)OpenBSD: strsep.c,v 1.6 2005/08/08 08:05:37 espie Exp $      */
  10
  11 /*-
  12  * Copyright (c) 1990, 1993
  13  *      The Regents of the University of California.  All rights reserved.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  * 3. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 /*
  41  * Get next token from string *stringp, where tokens are possibly-empty
  42  * strings separated by characters from delim.
  43  *
  44  * Writes NULs into the string at *stringp to end tokens.
  45  * delim need not remain constant from call to call.
  46  * On return, *stringp points past the last NUL written (if there might
  47  * be further tokens), or is NULL (if there are definitely no more tokens).
  48  *
  49  * If *stringp is NULL, strsep returns NULL.
  50  */
  51 char *
  52 strsep(char **stringp, const char *delim)
  53 {
  54         char *s;
  55         const char *spanp;
  56         int c, sc;
  57         char *tok;
  58
  59         if ((s = *stringp) == NULL)
  60                 return (NULL);
  61         for (tok = s;;) {
  62                 c = *s++;
  63                 spanp = delim;
  64                 do {
  65                         if ((sc = *spanp++) == c) {
  66                                 if (c == 0)
  67                                         s = NULL;
  68                                 else
  69                                         s[-1] = 0;
  70                                 *stringp = s;
  71                                 return (tok);
  72                         }
  73                 } while (sc != 0);
  74         }
  75         /* NOTREACHED */
  76 }
  77
  78 #endif