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- /* Reentrant string tokenizer. Generic version.
- Copyright (C) 1991, 1996-1999, 2001, 2004, 2007, 2009-2021 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 <https://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
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