raze/source/sw/src/lists.h

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//-------------------------------------------------------------------------
/*
Copyright (C) 1997, 2005 - 3D Realms Entertainment
This file is part of Shadow Warrior version 1.2
Shadow Warrior 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.
Original Source: 1997 - Frank Maddin and Jim Norwood
Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms
*/
//-------------------------------------------------------------------------
#ifndef LISTS_H
#define LISTS_H
/********************************************************************/
typedef
struct List
{
struct List *Next;
struct List *Prev;
} LISTHEAD, *LIST;
#define FIRST(list) (list->Next)
#define LAST(list) (list->Prev)
#define INITLIST(list) ( ((LIST) list)->Prev = ((LIST) list)->Next = (LIST) list)
#define INSERT(list, nodep) ( ((LIST) nodep)->Prev = (LIST) list, \
((LIST) nodep)->Next = ((LIST) list)->Next, \
((LIST) list)->Next = (LIST) nodep, \
((LIST) nodep)->Next->Prev = (LIST) nodep)
#define INSERT_TAIL(list, nodep) ( ((LIST) nodep)->Next = (LIST) list, \
((LIST) nodep)->Prev = ((LIST) list)->Prev, \
((LIST) list)->Prev = (LIST) nodep, \
((LIST) nodep)->Prev->Next = (LIST) nodep)
#define REMOVE(nodep) ( ((LIST) nodep)->Prev->Next = ((LIST) nodep)->Next, \
((LIST) nodep)->Next->Prev = ((LIST) nodep)->Prev)
#define TRAVERSE(l, o, n) ASSERT(((LIST)l)->Next && ((LIST)l)->Prev); for (o = (decltype(o))(((LIST)l)->Next); \
n = o->Next, (LIST) o != (LIST) l; \
o = n)
#define EMPTY(list) (((LIST) list)->Next == (LIST) list)
#endif