BZ#14812: Mark fixed in NEWS.
[glibc.git] / string / strtok.c
blob5db534508cc0b2ec0be6ab80cab32e09a56ebbc5
1 /* Copyright (C) 1991-2013 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <string.h>
21 static char *olds;
23 #undef strtok
25 /* Parse S into tokens separated by characters in DELIM.
26 If S is NULL, the last string strtok() was called with is
27 used. For example:
28 char s[] = "-abc-=-def";
29 x = strtok(s, "-"); // x = "abc"
30 x = strtok(NULL, "-="); // x = "def"
31 x = strtok(NULL, "="); // x = NULL
32 // s = "abc\0=-def\0"
34 char *
35 strtok (s, delim)
36 char *s;
37 const char *delim;
39 char *token;
41 if (s == NULL)
42 s = olds;
44 /* Scan leading delimiters. */
45 s += strspn (s, delim);
46 if (*s == '\0')
48 olds = s;
49 return NULL;
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 olds = __rawmemchr (token, '\0');
58 else
60 /* Terminate the token and make OLDS point past it. */
61 *s = '\0';
62 olds = s + 1;
64 return token;