compat/strtok_r.c

   1 /*****************************************************************************
   2  * strtok_r.c: POSIX strtok_r() replacement
   3  *****************************************************************************
   4  * Copyright © 1998-2009 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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 Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <string.h>
  26
  27 char *strtok_r(char *s, const char *delim, char **save_ptr)
  28 {
  29     char *token;
  30
  31     if (s == NULL)
  32         s = *save_ptr;
  33
  34     /* Scan leading delimiters. */
  35     s += strspn (s, delim);
  36     if (*s == '\0')
  37         return NULL;
  38
  39     /* Find the end of the token. */
  40     token = s;
  41     s = strpbrk (token, delim);
  42     if (s == NULL)
  43         /* This token finishes the string. */
  44         *save_ptr = strchr (token, '\0');
  45     else
  46     {
  47         /* Terminate the token and make *SAVE_PTR point past it. */
  48         *s = '\0';
  49         *save_ptr = s + 1;
  50     }
  51     return token;
  52 }