1/* Reentrant string tokenizer.  Generic version.
2   Copyright (C) 1991, 1996-1999, 2001, 2004, 2007, 2009-2014 Free Software
3   Foundation, Inc.
4   This file is part of the GNU C Library.
5
6   This program is free software: you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 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 General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
18
19#ifdef HAVE_CONFIG_H
20# include <config.h>
21#endif
22
23#include <string.h>
24
25#ifdef _LIBC
26# undef strtok_r
27# undef __strtok_r
28#else
29# define __strtok_r strtok_r
30# define __rawmemchr strchr
31#endif
32
33/* Parse S into tokens separated by characters in DELIM.
34   If S is NULL, the saved pointer in SAVE_PTR is used as
35   the next starting point.  For example:
36        char s[] = "-abc-=-def";
37        char *sp;
38        x = strtok_r(s, "-", &sp);      // x = "abc", sp = "=-def"
39        x = strtok_r(NULL, "-=", &sp);  // x = "def", sp = NULL
40        x = strtok_r(NULL, "=", &sp);   // x = NULL
41                // s = "abc\0-def\0"
42*/
43char *
44__strtok_r (char *s, const char *delim, char **save_ptr)
45{
46  char *token;
47
48  if (s == NULL)
49    s = *save_ptr;
50
51  /* Scan leading delimiters.  */
52  s += strspn (s, delim);
53  if (*s == '\0')
54    {
55      *save_ptr = s;
56      return NULL;
57    }
58
59  /* Find the end of the token.  */
60  token = s;
61  s = strpbrk (token, delim);
62  if (s == NULL)
63    /* This token finishes the string.  */
64    *save_ptr = __rawmemchr (token, '\0');
65  else
66    {
67      /* Terminate the token and make *SAVE_PTR point past it.  */
68      *s = '\0';
69      *save_ptr = s + 1;
70    }
71  return token;
72}
73#ifdef weak_alias
74libc_hidden_def (__strtok_r)
75weak_alias (__strtok_r, strtok_r)
76#endif
77