text: /* Reentrant string tokenizer.  Generic version.
     Copyright (C) 1991, 1996-1999, 2001, 2004, 2007, 2009-2016 Free Software
     Foundation, Inc.
     This file is part of the GNU C Library.
  
     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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #include <string.h>
  
  #ifdef _LIBC
  # undef strtok_r
  # undef __strtok_r
  #else
  # define __strtok_r strtok_r
  # define __rawmemchr strchr
  #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 *token;
  
    if (s == NULL)
      s = *save_ptr;
  
    /* Scan leading delimiters.  */
    s += strspn (s, delim);
    if (*s == '\0')
      {
        *save_ptr = s;
        return NULL;
      }
  
    /* Find the end of the token.  */
    token = s;
    s = strpbrk (token, delim);
    if (s == NULL)
      /* This token finishes the string.  */
      *save_ptr = __rawmemchr (token, '\0');
    else
      {
        /* Terminate the token and make *SAVE_PTR point past it.  */
        *s = '\0';
        *save_ptr = s + 1;
      }
    return token;
  }
  #ifdef weak_alias
  libc_hidden_def (__strtok_r)
  weak_alias (__strtok_r, strtok_r)
  #endif
  