/* Reentrant string tokenizer.  Generic version.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <string.h>

#ifndef _LIBC

/* Get specification.  */

# include "strtok_r.h"

# define __strtok_r strtok_r

#endif

/* Parse S into tokens separated by characters in DELIM.

   If S is NULL, the saved pointer in SAVE_PTR is used as

   the next starting point.  For example:

	char s[] = "-abc-=-def";

	char *sp;

	x = strtok_r(s, "-", &sp);	// x = "abc", sp = "=-def"

	x = strtok_r(NULL, "-=", &sp);	// x = "def", sp = NULL

	x = strtok_r(NULL, "=", &sp);	// x = NULL

		// s = "abc\0-def\0"

*/

char *

__strtok_r (char *s, const char *delim, char **save_ptr)

{

  char *end;

  if (s == NULL)

    s = *save_ptr;

  if (*s == '\0')

    {

      *save_ptr = s;

      return NULL;

    }

  /* Scan leading delimiters.  */

  s += strspn (s, delim);

  if (*s == '\0')

    {

      *save_ptr = s;

      return NULL;

    }

  /* Find the end of the token.  */

  end = s + strcspn (s, delim);

  if (*end == '\0')

    {

      *save_ptr = end;

      return s;

    }

  /* Terminate the token and make *SAVE_PTR point past it.  */

  *end = '\0';

  *save_ptr = end + 1;

  return s;

}

#ifdef weak_alias

libc_hidden_def (__strtok_r)

weak_alias (__strtok_r, strtok_r)

#endif