get_first.c
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/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* 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/>.
*/
#include "trbase.h"
#include "tr/list.h"
void *
TR_listGetFirst(TR_List this)
{
void * retval;
if (TR_listEmpty(this)) {
return NULL;
}
retval = this->data[this->start];
this->start = this->start + 1 == this->size ? 0 : this->start + 1;
return retval;
}
// vim: set ts=4 sw=4: