strtok/strtok_prev.c

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00001 // Copyright (C) 2006-2007 Benedikt Böhm <hollow@gentoo.org>
00002 //
00003 // This program is free software; you can redistribute it and/or
00004 // modify it under the terms of the GNU General Public License
00005 // as published by the Free Software Foundation; either version 2
00006 // of the License, or (at your option) any later version.
00007 //
00008 // This program is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011 // GNU General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the Free Software
00015 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
00016 
00017 #include "strtok.h"
00018 
00019 char *strtok_prev(strtok_t **st)
00020 {
00021         strtok_t *oldhead = *st;
00022         list_t   *prev    = (&(oldhead->list))->prev;
00023         strtok_t *newhead = list_entry(prev, strtok_t, list);
00024 
00025         *st = newhead;
00026 
00027         return oldhead->token;
00028 }

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