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(svn r3698) Add GetCrossingRailBits() and ComplementRoadBits(). Simplify the code by using them

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This commit is contained in:
tron
2006-03-01 12:31:39 +00:00
parent 793613a286
commit 3fc68907e3
3 changed files with 17 additions and 20 deletions
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12
rail_cmd.c
View File

@@ -434,23 +434,15 @@ int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
break;
case MP_STREET: {
RoadBits bits;
if (!IsLevelCrossing(tile)) return CMD_ERROR;
/* This is a crossing, let's check if the direction is correct */
if (_m[tile].m5 & 8) {
if (track != TRACK_X) return CMD_ERROR;
bits = ROAD_Y;
} else {
if (track != TRACK_Y) return CMD_ERROR;
bits = ROAD_X;
}
if (GetCrossingRailBits(tile) != trackbit) return CMD_ERROR;
if (!(flags & DC_EXEC))
return _price.remove_rail;
MakeRoadNormal(tile, _m[tile].m3, bits, 0);
MakeRoadNormal(tile, _m[tile].m3, GetCrossingRoadBits(tile), 0);
break;
}

11
road.h
View File

@@ -17,6 +17,11 @@ typedef enum RoadBits {
ROAD_ALL = ROAD_X | ROAD_Y
} RoadBits;
static inline RoadBits ComplementRoadBits(RoadBits r)
{
return ROAD_ALL ^ r;
}
static inline RoadBits GetRoadBits(TileIndex tile)
{
return GB(_m[tile].m5, 0, 4);
@@ -27,6 +32,12 @@ static inline RoadBits GetCrossingRoadBits(TileIndex tile)
return _m[tile].m5 & 8 ? ROAD_Y : ROAD_X;
}
static inline TrackBits GetCrossingRailBits(TileIndex tile)
{
return _m[tile].m5 & 8 ? TRACK_BIT_X : TRACK_BIT_Y;
}
typedef enum RoadType {
ROAD_NORMAL,
ROAD_CROSSING,

14
road_cmd.c
View File

@@ -235,21 +235,15 @@ int32 CmdRemoveRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)
}
case ROAD_CROSSING: {
TrackBits track;
if (!(ti.map5 & 8)) {
if (pieces & ROAD_Y) goto return_error;
track = TRACK_BIT_Y;
} else {
if (pieces & ROAD_X) goto return_error;
track = TRACK_BIT_X;
if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
goto return_error;
}
cost = _price.remove_road * 2;
if (flags & DC_EXEC) {
ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);
MakeRailNormal(tile, GetTileOwner(tile), track, GB(_m[tile].m4, 0, 4));
MakeRailNormal(tile, GetTileOwner(tile), GetCrossingRailBits(tile), GB(_m[tile].m4, 0, 4));
MarkTileDirtyByTile(tile);
}
return cost;
@@ -371,7 +365,7 @@ int32 CmdBuildRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)
break;
case ROAD_CROSSING:
if (pieces != (ti.map5 & 8 ? ROAD_Y : ROAD_X)) { // XXX is this correct?
if (pieces != GetCrossingRoadBits(ti.tile)) { // XXX is this correct?
return_cmd_error(STR_1007_ALREADY_BUILT);
}
goto do_clear;