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/*
Generic queue utilities.
Copyright (C) 2002 Robert Lipe, robertlipe+source@gpsbabel.org
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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "queue.h"
#include <cstddef>
void
enqueue(queue* new_el, queue* old)
{
new_el->next = old->next;
new_el->prev = old;
old->next->prev = new_el;
old->next = new_el;
}
queue*
dequeue(queue* element)
{
queue* prev = element->prev;
queue* next = element->next;
next->prev = prev;
prev->next = next;
QUEUE_INIT(element);
return element;
}
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