diff options
| -rw-r--r-- | pbs.c | 294 | ||||
| -rw-r--r-- | pbs.h | 86 |
2 files changed, 0 insertions, 380 deletions
diff --git a/pbs.c b/pbs.c deleted file mode 100644 index e18b0acf8..000000000 --- a/pbs.c +++ /dev/null @@ -1,294 +0,0 @@ -/* $Id$ */ - -#include "stdafx.h" -#include "openttd.h" -#include "functions.h" -#include "pbs.h" -#include "debug.h" -#include "map.h" -#include "tile.h" -#include "npf.h" -#include "pathfind.h" -#include "depot.h" -#include "waypoint.h" - -/** @file pbs.c Path-Based-Signalling implementation file - * @see pbs.h */ - -/* reserved track encoding: - normal railway tracks: - map3hi bits 4..6 = 'Track'number of reserved track + 1, if this is zero it means nothing is reserved on this tile - map3hi bit 7 = if this is set, then the opposite track ('Track'number^1) is also reserved - waypoints/stations: - map3lo bit 6 set = track is reserved - tunnels/bridges: - map3hi bit 0 set = track with 'Track'number 0 is reserved - map3hi bit 1 set = track with 'Track'number 1 is reserved - level crossings: - map5 bit 0 set = the rail track is reserved -*/ - -/** - * maps an encoded reserved track (from map3lo bits 4..7) - * to the tracks that are reserved. - * 0xFF are invalid entries and should never be accessed. - */ -static const byte encrt_to_reserved[16] = { - 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0xFF, - 0xFF, 0xFF, 0xFF, 0x0C, 0x0C, 0x30, 0x30, 0xFF -}; - -/** - * maps an encoded reserved track (from map3lo bits 4..7) - * to the track(dir)s that are unavailable due to reservations. - * 0xFFFF are invalid entries and should never be accessed. - */ -static const uint16 encrt_to_unavail[16] = { - 0x0000, 0x3F3F, 0x3F3F, 0x3737, 0x3B3B, 0x1F1F, 0x2F2F, 0xFFFF, - 0xFFFF, 0xFFFF, 0xFFFF, 0x3F3F, 0x3F3F, 0x3F3F, 0x3F3F, 0xFFFF -}; - -void PBSReserveTrack(TileIndex tile, Track track) { - assert(IsValidTile(tile)); - assert(track <= 5); - switch (GetTileType(tile)) { - case MP_RAILWAY: - if (IsRailWaypoint(tile)) { - // waypoint - SETBIT(_m[tile].m3, 6); - } else { - // normal rail track - byte encrt = GB(_m[tile].m4, 4, 4); // get current encoded info (see comments at top of file) - - if (encrt == 0) // nothing reserved before - encrt = track + 1; - else if (encrt == (track^1) + 1) // opposite track reserved before - encrt |= 8; - - SB(_m[tile].m4, 4, 4, encrt); - } - break; - case MP_TUNNELBRIDGE: - _m[tile].m4 |= (1 << track) & 3; - break; - case MP_STATION: - SETBIT(_m[tile].m3, 6); - break; - case MP_STREET: - // make sure it is a railroad crossing - if (!IsLevelCrossing(tile)) return; - SETBIT(_m[tile].m5, 0); - break; - default: - return; - } - // if debugging, mark tile dirty to show reserved status - if (_debug_pbs_level >= 1) - MarkTileDirtyByTile(tile); -} - -byte PBSTileReserved(TileIndex tile) { - assert(IsValidTile(tile)); - switch (GetTileType(tile)) { - case MP_RAILWAY: - if (IsRailWaypoint(tile)) { - // waypoint - // check if its reserved - if (!HASBIT(_m[tile].m3, 6)) return 0; - // return the track for the correct direction - return HASBIT(_m[tile].m5, 0) ? 2 : 1; - } else { - // normal track - byte res = encrt_to_reserved[GB(_m[tile].m4, 4, 4)]; - assert(res != 0xFF); - return res; - } - case MP_TUNNELBRIDGE: - return GB(_m[tile].m4, 0, 2); - case MP_STATION: - // check if its reserved - if (!HASBIT(_m[tile].m3, 6)) return 0; - // return the track for the correct direction - return HASBIT(_m[tile].m5, 0) ? 2 : 1; - case MP_STREET: - // make sure its a railroad crossing - if (!IsLevelCrossing(tile)) return 0; - // check if its reserved - if (!HASBIT(_m[tile].m5, 0)) return 0; - // return the track for the correct direction - return HASBIT(_m[tile].m5, 3) ? 1 : 2; - default: - return 0; - } -} - -uint16 PBSTileUnavail(TileIndex tile) { - assert(IsValidTile(tile)); - switch (GetTileType(tile)) { - case MP_RAILWAY: - if (IsRailWaypoint(tile)) { - // waypoint - return HASBIT(_m[tile].m3, 6) ? TRACKDIR_BIT_MASK : 0; - } else { - // normal track - uint16 res = encrt_to_unavail[GB(_m[tile].m4, 4, 4)]; - assert(res != 0xFFFF); - return res; - } - case MP_TUNNELBRIDGE: - return GB(_m[tile].m4, 0, 2) | (GB(_m[tile].m4, 0, 2) << 8); - case MP_STATION: - return HASBIT(_m[tile].m3, 6) ? TRACKDIR_BIT_MASK : 0; - case MP_STREET: - // make sure its a railroad crossing - if (!IsLevelCrossing(tile)) return 0; - // check if its reserved - return (HASBIT(_m[tile].m5, 0)) ? TRACKDIR_BIT_MASK : 0; - default: - return 0; - } -} - -void PBSClearTrack(TileIndex tile, Track track) { - assert(IsValidTile(tile)); - assert(track <= 5); - switch (GetTileType(tile)) { - case MP_RAILWAY: - if (IsRailWaypoint(tile)) { - // waypoint - CLRBIT(_m[tile].m3, 6); - } else { - // normal rail track - byte encrt = GB(_m[tile].m4, 4, 4); - - if (encrt == track + 1) - encrt = 0; - else if (encrt == track + 1 + 8) - encrt = (track^1) + 1; - else if (encrt == (track^1) + 1 + 8) - encrt &= 7; - - SB(_m[tile].m4, 4, 4, encrt); - } - break; - case MP_TUNNELBRIDGE: - _m[tile].m4 &= ~((1 << track) & 3); - break; - case MP_STATION: - CLRBIT(_m[tile].m3, 6); - break; - case MP_STREET: - // make sure it is a railroad crossing - if (!IsLevelCrossing(tile)) return; - CLRBIT(_m[tile].m5, 0); - break; - default: - return; - } - // if debugging, mark tile dirty to show reserved status - if (_debug_pbs_level >= 1) - MarkTileDirtyByTile(tile); -} - -void PBSClearPath(TileIndex tile, Trackdir trackdir, TileIndex end_tile, Trackdir end_trackdir) { - uint16 res; - FindLengthOfTunnelResult flotr; - assert(IsValidTile(tile)); - assert(IsValidTrackdir(trackdir)); - - do { - PBSClearTrack(tile, TrackdirToTrack(trackdir)); - - if (tile == end_tile && TrackdirToTrack(trackdir) == TrackdirToTrack(end_trackdir)) - return; - - if (IsTileType(tile, MP_TUNNELBRIDGE) && - GB(_m[tile].m5, 4, 4) == 0 && - GB(_m[tile].m5, 0, 2) == TrackdirToExitdir(trackdir)) { - // this is a tunnel - flotr = FindLengthOfTunnel(tile, TrackdirToExitdir(trackdir)); - - tile = flotr.tile; - } else { - byte exitdir = TrackdirToExitdir(trackdir); - tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir(exitdir)); - } - - res = PBSTileReserved(tile); - res |= res << 8; - res &= TrackdirReachesTrackdirs(trackdir); - trackdir = FindFirstBit2x64(res); - - } while (res != 0); -} - -bool PBSIsPbsSignal(TileIndex tile, Trackdir trackdir) -{ - assert(IsValidTile(tile)); - assert(IsValidTrackdir(trackdir)); - - if (!_patches.new_pathfinding_all) - return false; - - if (!IsTileType(tile, MP_RAILWAY)) - return false; - - if (GetRailTileType(tile) != RAIL_TYPE_SIGNALS) - return false; - - if (!HasSignalOnTrackdir(tile, trackdir)) - return false; - - if (GetSignalType(tile, TrackdirToTrack(trackdir)) == 4) - return true; - else - return false; -} - -typedef struct SetSignalsDataPbs { - int cur; - - // these are used to keep track of the signals. - byte bit[NUM_SSD_ENTRY]; - TileIndex tile[NUM_SSD_ENTRY]; -} SetSignalsDataPbs; - -// This function stores the signals inside the SetSignalsDataPbs struct, passed as callback to FollowTrack() in the PBSIsPbsSegment() function below -static bool SetSignalsEnumProcPBS(uint tile, SetSignalsDataPbs *ssd, int trackdir, uint length, byte *state) -{ - // the tile has signals? - if (IsTileType(tile, MP_RAILWAY)) { - if (HasSignalOnTrack(tile, TrackdirToTrack(trackdir))) { - - if (ssd->cur != NUM_SSD_ENTRY) { - ssd->tile[ssd->cur] = tile; // remember the tile index - ssd->bit[ssd->cur] = TrackdirToTrack(trackdir); // and the controlling bit number - ssd->cur++; - } - return true; - } else if (IsTileDepotType(tile, TRANSPORT_RAIL)) - return true; // don't look further if the tile is a depot - } - return false; -} - -bool PBSIsPbsSegment(uint tile, Trackdir trackdir) -{ - SetSignalsDataPbs ssd; - bool result = PBSIsPbsSignal(tile, trackdir); - DiagDirection direction = TrackdirToExitdir(trackdir);//GetDepotDirection(tile,TRANSPORT_RAIL); - int i; - - ssd.cur = 0; - - FollowTrack(tile, 0xC000 | TRANSPORT_RAIL, direction, (TPFEnumProc*)SetSignalsEnumProcPBS, NULL, &ssd); - for(i=0; i!=ssd.cur; i++) { - uint tile = ssd.tile[i]; - byte bit = ssd.bit[i]; - if (!PBSIsPbsSignal(tile, bit) && !PBSIsPbsSignal(tile, bit | 8)) - return false; - result = true; - } - - return result; -} diff --git a/pbs.h b/pbs.h deleted file mode 100644 index 68f0ad88b..000000000 --- a/pbs.h +++ /dev/null @@ -1,86 +0,0 @@ -/* $Id$ */ - -#ifndef PBS_H -#define PBS_H - -/** @file pbs.h Path-Based-Signalling header file - * @see pbs.c */ - -#include "vehicle.h" -#include "map.h" -#include "rail.h" - -/** - * constants used for pbs_mode argument of npf-functions - */ -enum pbs_modes { - PBS_MODE_NONE = 0, // no pbs - PBS_MODE_GREEN = 1, // look for green exit signal from pbs block - PBS_MODE_ANY = 2, // look for any exit signal from block -}; - -/** - * constants used for v->u.rail.pbs_status - */ -enum PBSStatus { - PBS_STAT_NONE = 0, - PBS_STAT_HAS_PATH = 1, - PBS_STAT_NEED_PATH = 2, -}; - - -void PBSReserveTrack(TileIndex tile, Track track); -/**< - * Marks a track as reserved. - * @param tile The tile of the track. - * @param track The track to reserve, valid values 0-5. - */ - -byte PBSTileReserved(TileIndex tile); -/**< - * Check which tracks are reserved on a tile. - * @param tile The tile which you want to check. - * @return The tracks reserved on that tile, each of the bits 0-5 is set when the corresponding track is reserved. - */ - -uint16 PBSTileUnavail(TileIndex tile); -/**< - * Check which trackdirs are unavailable due to reserved tracks on a tile. - * @param tile The tile which you want to check. - * @return The tracks reserved on that tile, each of the bits 0-5,8-13 is set when the corresponding trackdir is unavailable. - */ - -void PBSClearTrack(TileIndex tile, Track track); -/**< - * Unreserves a track. - * @param tile The tile of the track. - * @param track The track to unreserve, valid values 0-5. - */ - -void PBSClearPath(TileIndex tile, Trackdir trackdir, TileIndex end_tile, Trackdir end_trackdir); -/**< - * Follows a planned(reserved) path, and unreserves the tracks. - * @param tile The tile on which the path starts - * @param trackdir The trackdirection in which the path starts - * @param end_tile The tile on which the path ends - * @param end_trackdir The trackdirection in which the path ends - */ - -bool PBSIsPbsSignal(TileIndex tile, Trackdir trackdir); -/**< - * Checks if there are pbs signals on a track. - * @param tile The tile you want to check - * @param trackdir The trackdir you want to check - * @return True when there are pbs signals on that tile - */ - -bool PBSIsPbsSegment(uint tile, Trackdir trackdir); -/**< - * Checks if a signal/depot leads to a pbs block. - * This means that the block needs to have at least 1 signal, and that all signals in it need to be pbs signals. - * @param tile The tile to check - * @param trackdir The direction in which to check - * @return True when the depot is inside a pbs block - */ - -#endif /* PBS_H */ |