osdep/strsep.c

   1 /*
   2  * strsep implementation for systems that do not have it in libc
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <string.h>
  22
  23 #include "config.h"
  24 #include "strsep.h"
  25
  26 char *strsep(char **stringp, const char *delim) {
  27   char *begin, *end;
  28
  29   begin = *stringp;
  30   if(begin == NULL)
  31     return NULL;
  32
  33   if(delim[0] == '\0' || delim[1] == '\0') {
  34     char ch = delim[0];
  35
  36     if(ch == '\0')
  37       end = NULL;
  38     else {
  39       if(*begin == ch)
  40         end = begin;
  41       else if(*begin == '\0')
  42         end = NULL;
  43       else
  44         end = strchr(begin + 1, ch);
  45     }
  46   }
  47   else
  48     end = strpbrk(begin, delim);
  49
  50   if(end) {
  51     *end++ = '\0';
  52     *stringp = end;
  53   }
  54   else
  55     *stringp = NULL;
  56
  57   return begin;
  58 }