/*

    viDOOM - level editor for DOOM

    Copyright (C) 2000  Ian Cowburn (ianc@noddybox.demon.co.uk)

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    -------------------------------------------------------------------------

    WAD file definitions and readers

    These things should be noted about the handling of mutiple entries
    from different wad files:

	- Entries in later WADs overwrite earlier loaded WADs.

	- New entries for MAPxy and ExMy automatically overwrite the
	  following entries from the previous map:
		THINGS
		LINEDEFS
		SIDEDEFS
		VERTEXES
		SEGS
		SSECTORS
		NODES
		SECTORS
		REJECT
		BLOCKMAP

    If these entries don't appear in the new map they are
    replaced by dummy entries of zero length.

    $Id$

*/

#ifndef _WAD_H

#define _WAD_H

#include "map.h"
#include "list.h"

/* Basic WAD types
*/
#define DIRNAME_LEN	8
typedef char		DirName[DIRNAME_LEN+1];

/* Directory types
*/
typedef struct WadDir
	{
	char		*wad;	/* WAD the entry is from */
	DirName		name;	/* Lump name */
	Long		off;	/* Lump offset */
	Long		size;	/* Lump size */
	} WadDir;


/* Base level types and their sizes in the WAD
*/
#define THING_SIZE	(sizeof(Short)*5)

typedef struct Thing
	{
	Short	x;
	Short	y;
	Short	ang;
	Short	type;
	Short	opt;
	} Thing;

#define VERTEX_SIZE	(sizeof(Short)*2)

typedef struct Vertex
	{
	Short	x;
	Short	y;
	} Vertex;

#define SIDEDEF_SIZE	(sizeof(Short)*3+DIRNAME_LEN*3)

typedef struct Sidedef
	{
	Short	x;
	Short	y;
	DirName	upper;
	DirName	lower;
	DirName	middle;
	Short	sector;
	} Sidedef;

#define LINEDEF_SIZE	(sizeof(Short)*7)

typedef struct
	{
	Short	from;
	Short	to;
	Short	flags;
	Short	type;
	Short	tag;
	Short	right;
	Short	left;
	} Linedef;

#define SECTOR_SIZE	(sizeof(Short)*5+DIRNAME_LEN*2)

typedef struct Sector
	{
	Short	floor;
	Short	ceiling;
	DirName	floor_t;
	DirName	ceiling_t;
	Short	light;
	Short	special;
	Short	tag;
	} Sector;

typedef struct WadMap
	{
	Map	thing;
	Map	vertex;
	Map	linedef;
	Map	sidedef;
	Map	sector;
	} WadMap;


/* Error codes
*/
#define WAD_OK			0
#define WAD_FILE_NOT_FOUND	1
#define WAD_NOT_WAD		2
#define WAD_NOT_IWAD		3
#define WAD_NOT_PWAD		4
#define WAD_MAP_NOT_FOUND	5
#define WAD_LUMP_NOT_FOUND	6
#define WAD_COULD_NOT_CREATE	7
#define WAD_BROKEN		8	/* Must be last error code */

#define WAD_NOERROR		(WAD_BROKEN+1)


/* Add the named IWAD to the list of open WADs.  Returns non-zero on error.
*/
int	AddIWAD(char *wad);


/* Add the named PWAD to the list of open WADs.  Returns non-zero on error.
   AddPWAD() and AddIWAD() are by and large identical - they just include
   different checking so that the initial loading of IWAD will not allow it
   be a PWAD, and also do shareware checking.
*/
int	AddPWAD(char *wad);


/* Close a wad from the open list.  Removes entries for this wad fom the
   global directory, replacing entries from prevous WADs (if any).

   Returns non-zero on error.
*/
int	CloseWad(char *wad);


/* Returns a list of open WADS as a string like "<wad>|<wad>|..".  The return
   must be Release()ed after use.
*/
char	*OpenWads(void);


/* If you wish access to the directory of all the open wads, this allows
   them to retrieved as a List of WadDir.  Returns NULL if none.

   Note the directory is organised with the last loaded WAD files first.
   This is the quickest (though hungriest) method for ensuring that later
   WAD resources override earlier ones.
*/
Iterator GetWadDir(void);

/* No of entries in WadDir list
*/
int	GetWadDirSize(void);


/* Retrieves the named lump from the WADs.  Return is a pointer to size
   bytes.  If size is NULL it is not set.

   The pointer must be Release()'ed by the user afterwards.

   NULL indicates the lump could not be found.
*/
void	*GetLump(char *name, Long *size);


/* Load a MAPxx or ExMy map from the open wads.  Returns NULL on error.
*/
WadMap	*LoadMap(char *name);


/* Create a new empty map
*/
WadMap	*NewMap(void);


/* Release the memory for a WadMap
*/
WadMap	*ClearMap(WadMap *map);


/* Save the passed WadMap as a MAPxx or ExMy PWAD.  Note that this PWAD is
   overwritten and the map is the sole object written to the PWAD.  Returns
   non-zero on error.
*/
int	SaveMap(WadMap *map, char *name, char *wad);


/* Return the current error code
*/
int	WadError(void);


/* Return a string for the error code
*/
const char *WadErrorString(void);


#endif

/* END OF FILE */