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strtok_r.c
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strtok_r.c
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/*
* strtok_r.c:
* Implementation of strtok_r for systems which don't have it.
*
* This is taken from the GNU C library and is distributed under the terms of
* the LGPL. See copyright notice below.
*
*/
#ifdef HAVE_CONFIG_H
#include "configuration.h"
#endif /* HAVE_CONFIG_H */
#ifndef HAVE_STRTOK_R
static const char rcsid[] = "$Id: strtok_r.c,v 1.1 2001/04/24 14:25:34 chris Exp $";
/* Reentrant string tokenizer. Generic version.
Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <string.h>
#undef strtok_r
/* 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') return NULL;
/* Find the end of the token. */
token = s;
s = strpbrk(token, delim);
if (s == NULL)
/* This token finishes the string. */
*save_ptr = strchr(token, '\0');
else {
/* Terminate the token and make *SAVE_PTR point past it. */
*s = '\0';
*save_ptr = s + 1;
}
return token;
}
#endif /* !HAVE_STRTOK_R */