1 /* Reentrant string tokenizer. Generic version.
2 Copyright (C) 1991,1996-1999,2001,2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 #include <string.h>
20
21 #ifdef __USE_GNU
22 # define __rawmemchr rawmemchr
23 #else
24 # define __rawmemchr strchr
25 #endif
26 #if 0
27 Parse S into tokens separated by characters in DELIM.
28 If S is NULL, the saved pointer in SAVE_PTR is used as
29 the next starting point. For example:
30 char s[] = "-abc-=-def";
31 char *sp;
32 x = strtok_r(s, "-", &sp); /* x = "abc", sp = "=-def" */
33 x = strtok_r(NULL, "-=", &sp); /* x = "def", sp = NULL */
34 x = strtok_r(NULL, "=", &sp); /* x = NULL */
35 /* s = "abc\0-def\0" */
36 #endif
strtok_r(char * s,const char * delim,char ** save_ptr)37 char *strtok_r (char *s, const char *delim, char **save_ptr)
38 {
39 char *token;
40
41 if (s == NULL)
42 s = *save_ptr;
43
44 /* Scan leading delimiters. */
45 s += strspn (s, delim);
46 if (*s == '\0')
47 {
48 *save_ptr = s;
49 return NULL;
50 }
51
52 /* Find the end of the token. */
53 token = s;
54 s = strpbrk (token, delim);
55 if (s == NULL)
56 /* This token finishes the string. */
57 *save_ptr = __rawmemchr (token, '\0');
58 else
59 {
60 /* Terminate the token and make *SAVE_PTR point past it. */
61 *s = '\0';
62 *save_ptr = s + 1;
63 }
64 return token;
65 }
66 libc_hidden_def(strtok_r)
67