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CnC_Renegade/Code/wwlib/strtok_r.cpp

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/*
** Command & Conquer Renegade(tm)
** Copyright 2025 Electronic Arts Inc.
**
** 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 <http://www.gnu.org/licenses/>.
*/
/***************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***************************************************************************
* *
* Project Name : G *
* *
* $Archive:: /G/wwlib/strtok_r.cpp $*
* *
* $Author:: Neal_k $*
* *
* $Modtime:: 4/03/00 11:43a $*
* *
* $Revision:: 1 $*
* *
*-------------------------------------------------------------------------*
* Functions: *
* strtok_r -- POSIX replacement for strtok (no internal static) *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "strtok_r.h"
#include <string.h>
#include <stdio.h>
//
// Replacement for strtok() that doesn't use a static to
// store the current position. The name comes from the
// POSIX threadsafe version of strtok (r = reentrant). The
// user provided var lasts is used in place of the static.
//
// Yes the Windows version of strtok is already threadsafe,
// but the fact that you can't call a function that uses strtok()
// during a series of strtok() calls is really annoying.
//
#ifndef _UNIX
char *strtok_r(char *strptr, const char *delimiters, char **lasts)
{
if (strptr)
*lasts=strptr;
if ((*lasts)[0]==0) // 0 length string?
return(NULL);
//
// Note: strcspn & strspn are both called, they're opposites
//
int dstart=strcspn(*lasts, delimiters); // find first char of string in delimiters
if (dstart == 0) // string starts with a delimiter
{
int dend=strspn(*lasts, delimiters); // find last char of string NOT in delimiters
*lasts+=dend;
if ((*lasts)[0]==0) // 0 length string?
return(NULL);
dstart=strcspn(*lasts, delimiters);
}
char *retval=*lasts;
if ((*lasts)[dstart]==0) // is this the last token?
*lasts+=dstart;
else // at least one more token to go...
{
(*lasts)[dstart]=0; // null out the end
*lasts+=(dstart+1); // advance pointer
}
return(retval);
}
#endif