80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Reentrant string tokenizer. Generic version.
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<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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#ifndef _LIBC
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/* Get specification. */
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# include "strtok_r.h"
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# define __strtok_r strtok_r
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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 *end;
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if (s == NULL)
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s = *save_ptr;
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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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/* 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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end = s + strcspn (s, delim);
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if (*end == '\0')
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{
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*save_ptr = end;
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return s;
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}
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/* Terminate the token and make *SAVE_PTR point past it. */
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*end = '\0';
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*save_ptr = end + 1;
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return s;
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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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