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

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r24422:3fa67b2abcd2 2.5 KiB text/x-c Show Annotation Show as Raw Download as Raw

Patric Stout

Fix: change the working-dir searchpath when using '-c'

Basically, with '-c' you now create a sandbox. It will still use
your personal-dir and global-dir to find files you installed there,
but all new files are stored with a base folder identical to the
folder the configuration is in.

This is a bit of an old bug, that we many have tried to solve in
various of different ways. The code has grown sufficiently complex
that it is hard to see what consequences of actions are. This is
in my opinion the most harmless solution, while increasing the
usefulness of the '-c' flag.

In essence, the problem was that empty folders were always created
in the directory where the configuration was, but as that directory
wasn't added to any searchpath, files weren't stored there, unless
by accident it was a folder already on the searchpath. For example,
if you do './openttd -c local.cfg', it did work as expected. But
in the more generic variant, it did not.

With this patch, you can run './openttd -c /new/folder/local.cfg',
and it will create and prepare that folder to receive new files.

'content_download' is also stored in the directory the
configuration is in; this was already the case. Important to
note that there is only one search-path for 'content_download'.
In other words, when using '-c', it will not look in '~/.openttd'
inside the 'content_download' folder.

/*
 * 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 pbs.h PBS support routines */

#ifndef PBS_H
#define PBS_H

#include "tile_type.h"
#include "direction_type.h"
#include "track_type.h"
#include "vehicle_type.h"

TrackBits GetReservedTrackbits(TileIndex t);

void SetRailStationPlatformReservation(TileIndex start, DiagDirection dir, bool b);

bool TryReserveRailTrack(TileIndex tile, Track t, bool trigger_stations = true);
void UnreserveRailTrack(TileIndex tile, Track t);

/** This struct contains information about the end of a reserved path. */
struct PBSTileInfo {
	TileIndex tile;      ///< Tile the path ends, INVALID_TILE if no valid path was found.
	Trackdir  trackdir;  ///< The reserved trackdir on the tile.
	bool      okay;      ///< True if tile is a safe waiting position, false otherwise.

	/**
	 * Create an empty PBSTileInfo.
	 */
	PBSTileInfo() : tile(INVALID_TILE), trackdir(INVALID_TRACKDIR), okay(false) {}

	/**
	 * Create a PBSTileInfo with given tile, track direction and safe waiting position information.
	 * @param _t The tile where the path ends.
	 * @param _td The reserved track dir on the tile.
	 * @param _okay Whether the tile is a safe waiting point or not.
	 */
	PBSTileInfo(TileIndex _t, Trackdir _td, bool _okay) : tile(_t), trackdir(_td), okay(_okay) {}
};

PBSTileInfo FollowTrainReservation(const Train *v, Vehicle **train_on_res = nullptr);
bool IsSafeWaitingPosition(const Train *v, TileIndex tile, Trackdir trackdir, bool include_line_end, bool forbid_90deg = false);
bool IsWaitingPositionFree(const Train *v, TileIndex tile, Trackdir trackdir, bool forbid_90deg = false);

Train *GetTrainForReservation(TileIndex tile, Track track);

/**
 * Check whether some of tracks is reserved on a tile.
 *
 * @param tile the tile
 * @param tracks the tracks to test
 * @return true if at least on of tracks is reserved
 */
static inline bool HasReservedTracks(TileIndex tile, TrackBits tracks)
{
	return (GetReservedTrackbits(tile) & tracks) != TRACK_BIT_NONE;
}

#endif /* PBS_H */