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Patric Stout

Remove: DOS support

In 10 years there was no active development on DOS. Although it
turned out to still work, the FPS was very bad. There is little
interest in the current community to look into this.

Further more, we like to switch to c++11 functions for threads,
which are not implemented by DJGPP, the only current compiler
for DOS.

Additionally, DOS is the only platform which does not support
networking. It is the reason we have tons of #ifdefs to support
disabling networking.

By removing DOS support, we can both use c++11 functions for threads,
and remove all the code related to disabling network. Sadly, this
means we have to see DOS go.

Of course, if you feel up for the task, simply revert this commit,
and implement stub c++11 functions for threads and stub functions
for networking. We are more than happy to accept such Pull Request.

/* $Id$ */

/*
 * 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 road_type.h Enums and other types related to roads. */

#ifndef ROAD_TYPE_H
#define ROAD_TYPE_H

#include "core/enum_type.hpp"

/**
 * The different roadtypes we support
 *
 * @note currently only ROADTYPE_ROAD and ROADTYPE_TRAM are supported.
 */
enum RoadType {
	ROADTYPE_BEGIN = 0,      ///< Used for iterations
	ROADTYPE_ROAD = 0,       ///< Basic road type
	ROADTYPE_TRAM = 1,       ///< Trams
	ROADTYPE_END,            ///< Used for iterations
	INVALID_ROADTYPE = 0xFF, ///< flag for invalid roadtype
};
DECLARE_POSTFIX_INCREMENT(RoadType)
template <> struct EnumPropsT<RoadType> : MakeEnumPropsT<RoadType, byte, ROADTYPE_BEGIN, ROADTYPE_END, INVALID_ROADTYPE, 2> {};

/**
 * The different roadtypes we support, but then a bitmask of them
 * @note currently only roadtypes with ROADTYPE_ROAD and ROADTYPE_TRAM are supported.
 */
enum RoadTypes {
	ROADTYPES_NONE     = 0,                                ///< No roadtypes
	ROADTYPES_ROAD     = 1 << ROADTYPE_ROAD,               ///< Road
	ROADTYPES_TRAM     = 1 << ROADTYPE_TRAM,               ///< Trams
	ROADTYPES_ALL      = ROADTYPES_ROAD | ROADTYPES_TRAM,  ///< Road + trams
	ROADTYPES_END,                                         ///< Used for iterations?
	INVALID_ROADTYPES  = 0xFF,                             ///< Invalid roadtypes
};
DECLARE_ENUM_AS_BIT_SET(RoadTypes)
template <> struct EnumPropsT<RoadTypes> : MakeEnumPropsT<RoadTypes, byte, ROADTYPES_NONE, ROADTYPES_END, INVALID_ROADTYPES, 2> {};
typedef SimpleTinyEnumT<RoadTypes, byte> RoadTypesByte;


/**
 * Enumeration for the road parts on a tile.
 *
 * This enumeration defines the possible road parts which
 * can be build on a tile.
 */
enum RoadBits {
	ROAD_NONE = 0U,                  ///< No road-part is build
	ROAD_NW   = 1U,                  ///< North-west part
	ROAD_SW   = 2U,                  ///< South-west part
	ROAD_SE   = 4U,                  ///< South-east part
	ROAD_NE   = 8U,                  ///< North-east part
	ROAD_X    = ROAD_SW | ROAD_NE,   ///< Full road along the x-axis (south-west + north-east)
	ROAD_Y    = ROAD_NW | ROAD_SE,   ///< Full road along the y-axis (north-west + south-east)

	ROAD_N    = ROAD_NE | ROAD_NW,   ///< Road at the two northern edges
	ROAD_E    = ROAD_NE | ROAD_SE,   ///< Road at the two eastern edges
	ROAD_S    = ROAD_SE | ROAD_SW,   ///< Road at the two southern edges
	ROAD_W    = ROAD_NW | ROAD_SW,   ///< Road at the two western edges

	ROAD_ALL  = ROAD_X  | ROAD_Y,    ///< Full 4-way crossing

	ROAD_END  = ROAD_ALL + 1,        ///< Out-of-range roadbits, used for iterations
};
DECLARE_ENUM_AS_BIT_SET(RoadBits)
template <> struct EnumPropsT<RoadBits> : MakeEnumPropsT<RoadBits, byte, ROAD_NONE, ROAD_END, ROAD_NONE, 4> {};

#endif /* ROAD_TYPE_H */