cpp/openttd-patchpack/source Files · src/object_map.h

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rubidium

(svn r26708) -Codechange: replace C preprocessor with all kinds of options to prevent adding certain things to the result and the sed script to remove everything that shouldn't be in the resulting nfo file but came out of the C preprocessor by a small-ish awk program. This means no more breaking if a C preprocessor decides to add more data to the processed file (like GCC's inclusion of stdc-predef.h when not passing -nostdinc). It furthermore more than halfs the time needed for the assemble step of the extra GRF compilation

/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file object_map.h Map accessors for object tiles. */

#ifndef OBJECT_MAP_H
#define OBJECT_MAP_H

#include "water_map.h"
#include "object_type.h"

ObjectType GetObjectType(TileIndex t);

/**
 * Check whether the object on a tile is of a specific type.
 * @param t Tile to test.
 * @param type Type to test.
 * @pre IsTileType(t, MP_OBJECT)
 * @return True if type matches.
 */
static inline bool IsObjectType(TileIndex t, ObjectType type)
{
	return GetObjectType(t) == type;
}

/**
 * Check whether a tile is a object tile of a specific type.
 * @param t Tile to test.
 * @param type Type to test.
 * @return True if type matches.
 */
static inline bool IsObjectTypeTile(TileIndex t, ObjectType type)
{
	return IsTileType(t, MP_OBJECT) && GetObjectType(t) == type;
}

/**
 * Get the index of which object this tile is attached to.
 * @param t the tile
 * @pre IsTileType(t, MP_OBJECT)
 * @return The ObjectID of the object.
 */
static inline ObjectID GetObjectIndex(TileIndex t)
{
	assert(IsTileType(t, MP_OBJECT));
	return _m[t].m2 | _m[t].m5 << 16;
}

/**
 * Get the random bits of this tile.
 * @param t The tile to get the bits for.
 * @pre IsTileType(t, MP_OBJECT)
 * @return The random bits.
 */
static inline byte GetObjectRandomBits(TileIndex t)
{
	assert(IsTileType(t, MP_OBJECT));
	return _m[t].m3;
}


/**
 * Make an Object tile.
 * @param t      The tile to make and object tile.
 * @param o      The new owner of the tile.
 * @param index  Index to the object.
 * @param wc     Water class for this object.
 * @param random Random data to store on the tile
 */
static inline void MakeObject(TileIndex t, Owner o, ObjectID index, WaterClass wc, byte random)
{
	SetTileType(t, MP_OBJECT);
	SetTileOwner(t, o);
	SetWaterClass(t, wc);
	_m[t].m2 = index;
	_m[t].m3 = random;
	_m[t].m4 = 0;
	_m[t].m5 = index >> 16;
	SB(_m[t].m6, 2, 4, 0);
	_me[t].m7 = 0;
}

#endif /* OBJECT_MAP_H */