66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* Reentrant string tokenizer. Generic version.
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Copyright (C) 1991, 1996, 1997, 1998, 1999 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <string.h>
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#undef strtok_r
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#undef __strtok_r
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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 (s, delim, save_ptr)
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char *s;
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const char *delim;
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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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return NULL;
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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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weak_alias (__strtok_r, strtok_r)
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