77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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/* Reentrant string tokenizer. Generic version.
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Copyright (C) 1991, 1996-1999, 2001, 2004, 2007, 2009-2021 Free Software
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Foundation, Inc.
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This file is part of the GNU C Library.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#ifdef _LIBC
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# undef strtok_r
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# undef __strtok_r
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#else
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# define __strtok_r strtok_r
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# define __rawmemchr strchr
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#endif
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/* Parse S into tokens separated by characters in DELIM.
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If S is NULL, the saved pointer in SAVE_PTR is used as
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the next starting point. For example:
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char s[] = "-abc-=-def";
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char *sp;
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x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def"
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x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL
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x = strtok_r(NULL, "=", &sp); // x = NULL
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// s = "abc\0-def\0"
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*/
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char *
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__strtok_r (char *s, const char *delim, char **save_ptr)
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{
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char *token;
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if (s == NULL)
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s = *save_ptr;
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/* Scan leading delimiters. */
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s += strspn (s, delim);
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if (*s == '\0')
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{
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*save_ptr = s;
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return NULL;
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}
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/* Find the end of the token. */
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token = s;
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s = strpbrk (token, delim);
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if (s == NULL)
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/* This token finishes the string. */
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*save_ptr = __rawmemchr (token, '\0');
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else
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{
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/* Terminate the token and make *SAVE_PTR point past it. */
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*s = '\0';
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*save_ptr = s + 1;
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}
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return token;
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}
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#ifdef weak_alias
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libc_hidden_def (__strtok_r)
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weak_alias (__strtok_r, strtok_r)
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#endif
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