lib/mbssep.c

   1 /* Tokenizing a string.
   2    Copyright (C) 2007-2020 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2007.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include <string.h>
  22
  23 #include <stdlib.h>
  24
  25 #include "mbuiter.h"
  26
  27 char *
  28 mbssep (char **stringp, const char *delim)
  29 {
  30   if (MB_CUR_MAX > 1)
  31     {
  32       char *start = *stringp;
  33       char *ptr;
  34
  35       if (start == NULL)
  36         return NULL;
  37
  38       /* No need to optimize the cases of 0 or 1 delimiters specially,
  39          since mbspbrk already optimizes them.  */
  40
  41       ptr = mbspbrk (start, delim);
  42
  43       if (ptr == NULL)
  44         {
  45           *stringp = NULL;
  46           return start;
  47         }
  48       else
  49         {
  50           mbui_iterator_t iter;
  51
  52           mbui_init (iter, ptr);
  53           if (!mbui_avail (iter))
  54             abort ();
  55           mbui_advance (iter);
  56           *ptr = '\0';
  57           *stringp = (char *) mbui_cur_ptr (iter);
  58           return start;
  59         }
  60     }
  61   else
  62     return strsep (stringp, delim);
  63 }