nspr-4.8.6/mozilla/nsprpub/lib/libc/src/strtok.c

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape Portable Runtime (NSPR).
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Roland Mainz <roland mainz@informatik.med.uni-giessen.de>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "plstr.h"

PR_IMPLEMENT(char *)
PL_strtok_r(char *s1, const char *s2, char **lasts)
{
    const char *sepp;
    int         c, sc;
    char       *tok;

    if( s1 == NULL )
    {
        if( *lasts == NULL )
            return NULL;

        s1 = *lasts;
    }
  
    for( ; (c = *s1) != 0; s1++ )
    {
        for( sepp = s2 ; (sc = *sepp) != 0 ; sepp++ )
        {
            if( c == sc )
                break;
        }
        if( sc == 0 )
            break; 
    }

    if( c == 0 )
    {
        *lasts = NULL;
        return NULL;
    }
  
    tok = s1++;

    for( ; (c = *s1) != 0; s1++ )
    {
        for( sepp = s2; (sc = *sepp) != 0; sepp++ )
        {
            if( c == sc )
            {
                *s1++ = '\0';
                *lasts = s1;
                return tok;
            }
        }
    }
    *lasts = NULL;
    return tok;
}