/* Tokenizing a string.
   Copyright (C) 2007 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2007.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

#include <config.h>

/* Specification.  */
#include <string.h>

#if HAVE_MBRTOWC
# include "mbuiter.h"
#endif

char *
mbssep (char **stringp, const char *delim)
{
#if HAVE_MBRTOWC
  if (MB_CUR_MAX > 1)
    {
      char *start = *stringp;
      char *ptr;

      if (start == NULL)
	return NULL;

      /* No need to optimize the cases of 0 or 1 delimiters specially,
	 since mbspbrk already optimizes them.  */

      ptr = mbspbrk (start, delim);

      if (ptr == NULL)
	{
	  *stringp = NULL;
	  return start;
	}
      else
	{
	  mbui_iterator_t iter;

	  mbui_init (iter, ptr);
	  if (!mbui_avail (iter))
	    abort ();
	  mbui_advance (iter);
	  *ptr = '\0';
	  *stringp = (char *) mbui_cur_ptr (iter);
	  return start;
	}
    }
  else
#endif
    return strsep (stringp, delim);
}