(svn r2279) - Fix: Check the parameters of the first 10 Commands. While there also add proper comments for the functions and fix up CmdFailed()
--- a/clear_cmd.c Sat May 07 08:14:06 2005 +0000
+++ b/clear_cmd.c Sat May 07 10:26:12 2005 +0000
@@ -210,20 +210,23 @@
return true;
}
-/* Terraform land
- * p1 - corners
- * p2 - direction
+/** Terraform land
+ * @param x,y coordinates to terraform
+ * @param p1 corners to terraform. Human user only north, towns more
+ * @param p2 direction; eg up or down
*/
-
int32 CmdTerraformLand(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TerraformerState ts;
- uint tile;
+ TileIndex tile;
int direction;
TerraformerHeightMod modheight_data[576];
TileIndex tile_table_data[625];
+ /* A normal user can only terraform one corner, the northern one; p1 & 8 */
+ if (_current_player < MAX_PLAYERS && p1 != 8) return CMD_ERROR;
+
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
_error_message = INVALID_STRING_ID;
@@ -267,7 +270,7 @@
int count;
TileIndex *ti = ts.tile_table;
- for(count = ts.tile_table_count; count != 0; count--, ti++) {
+ for (count = ts.tile_table_count; count != 0; count--, ti++) {
uint z, t;
uint tile = *ti;
@@ -289,7 +292,7 @@
{
int count;
TileIndex *ti = ts.tile_table;
- for(count = ts.tile_table_count; count != 0; count--, ti++) {
+ for (count = ts.tile_table_count; count != 0; count--, ti++) {
DoCommandByTile(*ti, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
}
@@ -301,7 +304,7 @@
uint til;
mod = ts.modheight;
- for(count = ts.modheight_count; count != 0; count--, mod++) {
+ for (count = ts.modheight_count; count != 0; count--, mod++) {
til = mod->tile;
SetTileHeight(til, mod->height);
@@ -313,7 +316,7 @@
{
int count;
TileIndex *ti = ts.tile_table;
- for(count = ts.tile_table_count; count != 0; count--, ti++) {
+ for (count = ts.tile_table_count; count != 0; count--, ti++) {
MarkTileDirtyByTile(*ti);
}
}
--- a/command.h Sat May 07 08:14:06 2005 +0000
+++ b/command.h Sat May 07 10:26:12 2005 +0000
@@ -191,4 +191,6 @@
bool IsValidCommand(uint cmd);
int32 GetAvailableMoneyForCommand(void);
+/* Validate functions for rail building */
+static inline bool ValParamRailtype(uint32 rail) { return (rail > GetPlayer(_current_player)->max_railtype) ? false : true;}
#endif /* COMMAND_H */
--- a/landscape.c Sat May 07 08:14:06 2005 +0000
+++ b/landscape.c Sat May 07 10:26:12 2005 +0000
@@ -273,11 +273,11 @@
_tile_type_procs[GetTileType(tile)]->get_tile_desc_proc(tile, td);
}
-/* Clear a piece of landscape
- * p1 = 0,
- * p2 = 0
+/** Clear a piece of landscape
+ * @param x,y coordinates of clearance
+ * @param p1 unused
+ * @param p2 unused
*/
-
int32 CmdLandscapeClear(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile = TILE_FROM_XY(x, y);
--- a/rail_cmd.c Sat May 07 08:14:06 2005 +0000
+++ b/rail_cmd.c Sat May 07 10:26:12 2005 +0000
@@ -275,8 +275,15 @@
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
}
-int32 CmdBuildSingleRail(int x, int y, uint32 flags,
- uint32 rail_type, uint32 rail)
+/* Validate functions for rail building */
+static inline bool ValParamTrackOrientation(uint32 rail) {return (rail > 5) ? false : true;}
+
+/** Build a single piece of rail
+ * @param x,y coordinates on where to build
+ * @param p1 railtype of being built piece (normal, mono, maglev)
+ * @param p2 rail combination to build
+ */
+int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile;
uint tileh;
@@ -285,14 +292,12 @@
int32 cost = 0;
int32 ret;
- if (rail_type > _players[_current_player].max_railtype ||
- rail > 5) // invalid track number?
- return CMD_ERROR;
+ if (!(ValParamRailtype(p1) && ValParamTrackOrientation(p2))) return CMD_ERROR;
tile = TILE_FROM_XY(x, y);
tileh = GetTileSlope(tile, NULL);
m5 = _map5[tile];
- rail_bit = 1 << rail;
+ rail_bit = 1 << p2;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
@@ -313,7 +318,7 @@
if (flags & DC_EXEC) {
_map_owner[tile] = _current_player;
_map3_lo[tile] &= ~0x0F;
- _map3_lo[tile] |= rail_type;
+ _map3_lo[tile] |= p1;
_map5[tile] = (m5 & 0xC7) | 0x20; // railroad under bridge
}
break;
@@ -334,7 +339,7 @@
}
if (m5 & RAIL_TYPE_SPECIAL ||
_map_owner[tile] != _current_player ||
- (_map3_lo[tile] & 0xFU) != rail_type) {
+ (_map3_lo[tile] & 0xFU) != p1) {
// Get detailed error message
return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
@@ -361,7 +366,7 @@
if (flags & DC_EXEC) {
_map3_lo[tile] = _map_owner[tile];
_map_owner[tile] = _current_player;
- _map3_hi[tile] = rail_type;
+ _map3_hi[tile] = p1;
_map5[tile] = 0x10 | (rail_bit == 1 ? 0x08 : 0x00); // level crossing
}
break;
@@ -384,7 +389,7 @@
SetTileType(tile, MP_RAILWAY);
_map_owner[tile] = _current_player;
_map2[tile] = 0; // Bare land
- _map3_lo[tile] = rail_type; // No signals, rail type
+ _map3_lo[tile] = p1; // No signals, rail type
_map5[tile] = rail_bit;
}
break;
@@ -392,7 +397,7 @@
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
- SetSignalsOnBothDir(tile, rail);
+ SetSignalsOnBothDir(tile, p2);
}
return cost + _price.build_rail;
@@ -414,17 +419,18 @@
};
-/* Remove a single track.
- * p1 - unused
- * p2 - tile direction
+/** Remove a single piece of track
+ * @param x,y coordinates for removal of track
+ * @param p1 unused
+ * @param p2 rail orientation
*/
-
int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileInfo ti;
+ TileIndex tile;
byte rail_bit = 1 << p2;
- byte m5;
- uint tile;
+
+ if (!ValParamTrackOrientation(p2)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
@@ -458,6 +464,7 @@
_map_owner[tile] = OWNER_NONE;
_map5[tile] = ti.map5 & 0xC7;
} else if (ti.type == MP_STREET) {
+ byte m5;
if (!(ti.map5 & 0xF0))
return CMD_ERROR;
@@ -526,11 +533,11 @@
0,-16,-16, 0,-16, 0, 0, 0,
}};
-static int32 ValidateAutoDrag(int *railbit, int x, int y, int ex, int ey)
+static int32 ValidateAutoDrag(byte *railbit, int x, int y, int ex, int ey)
{
int dx, dy, trdx, trdy;
- if (*railbit > 5) return CMD_ERROR; // only 6 possible track-combinations
+ if (!ValParamTrackOrientation(*railbit)) return CMD_ERROR;
// calculate delta x,y from start to end tile
dx = ex - x;
@@ -568,36 +575,37 @@
return 0;
}
-/* Build a stretch of railroad tracks.
- * x,y= start tile
- * p1 = end tile
- * p2 = (bit 0-3) - railroad type normal/maglev
- * p2 = (bit 4-6) - track-orientation, valid values: 0-5
- * p2 = (bit 7) - 0 = build, 1 = remove tracks
+/** Build a stretch of railroad tracks.
+ * @param x,y start tile of drag
+ * @param p1 end tile of drag
+ * @param p2 various bitstuffed elements
+ * - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev)
+ * - p2 = (bit 4-6) - track-orientation, valid values: 0-5
+ * - p2 = (bit 7) - 0 = build, 1 = remove tracks
*/
static int32 CmdRailTrackHelper(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int ex, ey;
int32 ret, total_cost = 0;
- int railbit = (p2 >> 4) & 7;
+ byte railbit = (p2 >> 4) & 7;
byte mode = HASBIT(p2, 7);
+ if (!(ValParamRailtype(p2 & 0x3) && ValParamTrackOrientation(railbit))) return CMD_ERROR;
+
/* unpack end point */
ex = TileX(p1) * 16;
ey = TileY(p1) * 16;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
- if (flags & DC_EXEC)
- SndPlayTileFx(SND_20_SPLAT_2, TILE_FROM_XY(x,y));
+ if (CmdFailed(ValidateAutoDrag(&railbit, x, y, ex, ey))) return CMD_ERROR;
- if (ValidateAutoDrag(&railbit, x, y, ex, ey) == CMD_ERROR)
- return CMD_ERROR;
+ if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, TILE_FROM_XY(x,y));
for(;;) {
- ret = DoCommand(x, y, p2&0x3, railbit&7, flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL);
+ ret = DoCommand(x, y, p2 & 0x3, railbit & 7, flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL);
- if (ret == CMD_ERROR) {
+ if (CmdFailed(ret)) {
if ((_error_message != STR_1007_ALREADY_BUILT) && (mode == 0))
break;
} else
@@ -613,15 +621,12 @@
if (railbit & 0x6) railbit ^= 1;
}
- if (total_cost == 0)
- return CMD_ERROR;
-
- return total_cost;
+ return (total_cost == 0) ? CMD_ERROR : total_cost;
}
int32 CmdBuildRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
- return CmdRailTrackHelper(x, y, flags, p1, p2);
+ return CmdRailTrackHelper(x, y, flags, p1, CLRBIT(p2, 7));
}
int32 CmdRemoveRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2)
@@ -629,20 +634,23 @@
return CmdRailTrackHelper(x, y, flags, p1, SETBIT(p2, 7));
}
-/* Build a train depot
- * p1 = rail type
- * p2 = depot direction
+/** Build a train depot
+ * @param x,y position of the train depot
+ * @param p1 rail type
+ * @param p2 depot direction (0 through 3), where 0 is NW, 1 is NE, etc.
*/
int32 CmdBuildTrainDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
- uint tile = TILE_FROM_XY(x,y);
+ Depot *d;
+ TileIndex tile = TILE_FROM_XY(x,y);
int32 cost, ret;
- Depot *depot;
uint tileh;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
+ /* check railtype and valid direction for depot (0 through 3), 4 in total */
+ if (!ValParamRailtype(p1) || p2 > 3) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
if (tileh != 0) {
@@ -651,11 +659,11 @@
}
ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
- if (ret == CMD_ERROR) return CMD_ERROR;
+ if (CmdFailed(ret)) return CMD_ERROR;
cost = ret;
- depot = AllocateDepot();
- if (depot == NULL)
+ d = AllocateDepot();
+ if (d == NULL)
return CMD_ERROR;
if (flags & DC_EXEC) {
@@ -669,8 +677,8 @@
p2 | RAIL_TYPE_DEPOT /* map5 */
);
- depot->xy = tile;
- depot->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
+ d->xy = tile;
+ d->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
SetSignalsOnBothDir(tile, (p2&1) ? 2 : 1);
@@ -679,12 +687,13 @@
return cost + _price.build_train_depot;
}
-/* build signals, alternate between double/single, signal/semaphore,
- * pre/exit/combo-signals
- * p1 bits 0-2 - track-orientation, valid values: 0-5
- * p1 bit 3 - choose semaphores/signals or cycle normal/pre/exit/combo
- * depending on context
- * p2 = used for CmdBuildManySignals() to copy style of first signal
+/** Build signals, alternate between double/single, signal/semaphore,
+ * pre/exit/combo-signals, and what-else not
+ * @param x,y coordinates where signals is being built
+ * @param p1 various bitstuffed elements
+ * - p1 = (bit 0-2) - track-orientation, valid values: 0-5
+ * - p1 = (bit 3) - choose semaphores/signals or cycle normal/pre/exit/combo depending on context
+ * @param p2 used for CmdBuildManySignals() to copy style of first signal
*/
int32 CmdBuildSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
@@ -695,20 +704,16 @@
byte m5;
int32 cost;
- if (!(track < 6) || // only 6 possible track-combinations
- !IsTileType(tile, MP_RAILWAY) ||
- !EnsureNoVehicle(tile))
+ if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile))
return CMD_ERROR;
- // Protect against invalid signal copying
- if (p2 != 0 && (p2 & _signals_table_both[track]) == 0)
- return CMD_ERROR;
+ /* Protect against invalid signal copying */
+ if (p2 != 0 && (p2 & _signals_table_both[track]) == 0) return CMD_ERROR;
m5 = _map5[tile];
- if (m5 & 0x80 || // mustn't be a depot
- !HASBIT(m5, track)) // track must exist
- return CMD_ERROR;
+ /* You can't build signals in a depot, and the selected track must exist */
+ if (m5 & 0x80 || !HASBIT(m5, track)) return CMD_ERROR;
if (!CheckTileOwnership(tile)) return CMD_ERROR;
@@ -818,7 +823,7 @@
static int32 CmdSignalTrackHelper(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int ex, ey;
- int railbit = (p2 >> 4) & 7;
+ byte railbit = (p2 >> 4) & 7;
bool error = true;
TileIndex tile = TILE_FROM_XY(x, y);
int32 ret, total_cost, signal_ctr;
@@ -895,26 +900,24 @@
return CmdSignalTrackHelper(x, y, flags, p1, p2);
}
-/* Remove signals
- * p1 bits 0-2 = track, valid values: 0-5
- * p2 = unused
+/** Remove signals
+ * @param x,y coordinates where signal is being deleted from
+ * @param p1 track combination to remove signal from
*/
int32 CmdRemoveSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile = TILE_FROM_XY(x, y);
uint track = p1 & 0x7;
- if (!(track < 6) || // only 6 possible track-combinations
- !IsTileType(tile, MP_RAILWAY) ||
- !EnsureNoVehicle(tile))
+ if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile))
return CMD_ERROR;
if ((_map5[tile] & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS ||
(_map3_lo[tile] & _signals_table_both[track]) == 0) // signals on track?
return CMD_ERROR;
- if (_current_player != OWNER_WATER && !CheckTileOwnership(tile))
- return CMD_ERROR;
+ /* Only water can remove signals from anyone */
+ if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
--- a/station_cmd.c Sat May 07 08:14:06 2005 +0000
+++ b/station_cmd.c Sat May 07 10:26:12 2005 +0000
@@ -917,22 +917,23 @@
}
}
-/* build railroad station
- * p1 & 1 - orientation
- * (p1 >> 8) & 0xFF - numtracks
- * (p1 >> 16) & 0xFF - platform length
- * p2 & 0xF - railtype
- * p2 & 0x10 - set for custom station
- * p2 >> 8 - custom station id
+/** Build railroad station
+ * @param x_org,y_org starting position of station dragging/placement
+ * @param p1 various bitstuffed elements
+ * - p1 = (bit 0) - orientation (p1 & 1)
+ * - p1 = (bit 8-15) - number of tracks (p1 >> 8) & 0xFF)
+ * - p1 = (bit 16-23) - platform length (p1 >> 16) & 0xFF)
+ * @param p2 various bitstuffed elements
+ * - p2 = (bit 0- 3) - railtype (p2 & 0xF)
+ * - p2 = (bit 4) - set for custom station (p2 & 0x10)
+ * - p2 = (bit 8-..) - custom station id (p2 >> 8)
*/
-
-int32 CmdBuildRailroadStation(int x_org, int y_org, uint32 flags, uint32 p1, uint32 p2)
+int32 CmdBuildRailroadStation(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
- /* unpack params */
- int w_org,h_org;
- uint tile_org;
+ Station *st;
+ TileIndex tile_org;
+ int w_org, h_org;
int32 cost, ret;
- Station *st;
int est;
int plat_len, numtracks;
int direction;
@@ -940,25 +941,23 @@
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
- tile_org = TILE_FROM_XY(x_org,y_org);
+ tile_org = TILE_FROM_XY(x, y);
/* Does the authority allow this? */
- if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile_org))
- return CMD_ERROR;
-
- {
- /* unpack parameters */
- direction = p1 & 1;
- plat_len = (p1 >> 16) & 0xFF;
- numtracks = (p1 >> 8) & 0xFF;
- /* w = length, h = num_tracks */
- if (direction) {
- h_org = plat_len;
- w_org = numtracks;
- } else {
- w_org = plat_len;
- h_org = numtracks;
- }
+ if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile_org)) return CMD_ERROR;
+ if (!ValParamRailtype(p2 & 0xF)) return CMD_ERROR;
+
+ /* unpack parameters */
+ direction = p1 & 1;
+ numtracks = (p1 >> 8) & 0xFF;
+ plat_len = (p1 >> 16) & 0xFF;
+ /* w = length, h = num_tracks */
+ if (direction) {
+ h_org = plat_len;
+ w_org = numtracks;
+ } else {
+ w_org = plat_len;
+ h_org = numtracks;
}
// these values are those that will be stored in train_tile and station_platforms
@@ -970,7 +969,7 @@
est = -1;
// If DC_EXEC is in flag, do not want to pass it to CheckFlatLandBelow, because of a nice bug
// for detail info, see: https://sourceforge.net/tracker/index.php?func=detail&aid=1029064&group_id=103924&atid=636365
- if ((ret=CheckFlatLandBelow(tile_org, w_org, h_org, flags&~DC_EXEC, 5 << direction, _patches.nonuniform_stations ? &est : NULL)) == CMD_ERROR) return CMD_ERROR;
+ if (CmdFailed(ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags&~DC_EXEC, 5 << direction, _patches.nonuniform_stations ? &est : NULL))) return CMD_ERROR;
cost = ret + (numtracks * _price.train_station_track + _price.train_station_length) * plat_len;
// Make sure there are no similar stations around us.
@@ -1026,7 +1025,7 @@
// Now really clear the land below the station
// It should never return CMD_ERROR.. but you never know ;)
// (a bit strange function name for it, but it really does clear the land, when DC_EXEC is in flags)
- if (CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << direction, _patches.nonuniform_stations ? &est : NULL) == CMD_ERROR) return CMD_ERROR;
+ if (CmdFailed(CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << direction, _patches.nonuniform_stations ? &est : NULL))) return CMD_ERROR;
st->train_tile = finalvalues[0];
if (!st->facilities) st->xy = finalvalues[0];
@@ -1045,7 +1044,7 @@
GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
do {
- int tile = tile_org;
+ TileIndex tile = tile_org;
int w = plat_len;
do {
--- a/tunnelbridge_cmd.c Sat May 07 08:14:06 2005 +0000
+++ b/tunnelbridge_cmd.c Sat May 07 10:26:12 2005 +0000
@@ -161,11 +161,12 @@
return true;
}
-/* Build a Bridge
- * x,y - end tile coord
- * p1 - packed start tile coords (~ dx)
- * p2&0xFF - bridge type (hi bh)
- * p2>>8 - rail type. &0x80 means road bridge.
+/** Build a Bridge
+ * @param x,y end tile coord
+ * @param p1 packed start tile coords (~ dx)
+ * @param p2 various bitstuffed elements
+ * - p2 = (bit 0- 7) - bridge type (hi bh)
+ * - p2 = (bit 8-..) - rail type. bit15 ((x>>8)&0x80) means road bridge.
*/
int32 CmdBuildBridge(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
@@ -185,11 +186,15 @@
bridge_type = p2 & 0xFF;
railtype = (byte)(p2 >> 8);
+ /* Out of bounds bridge */
+ if (bridge_type >= MAX_BRIDGES) return_cmd_error(STR_5015_CAN_T_BUILD_BRIDGE_HERE);
+
// type of bridge
- if (railtype & 0x80) {
+ if (HASBIT(railtype, 7)) { // bit 15 of original p2 param
railtype = 0;
rail_or_road = 2;
} else {
+ if (!ValParamRailtype(railtype)) return CMD_ERROR;
rail_or_road = 0;
}
@@ -198,9 +203,6 @@
direction = 0;
- if (bridge_type >= MAX_BRIDGES) // out of bounds bridge
- return_cmd_error(STR_5015_CAN_T_BUILD_BRIDGE_HERE);
-
/* check if valid, and make sure that (x,y) are smaller than (sx,sy) */
if (x == sx) {
if (y == sy)
@@ -249,7 +251,7 @@
/* Try and clear the start landscape */
- if ((ret = DoCommandByTile(ti_start.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)) == CMD_ERROR)
+ if (CmdFailed(ret = DoCommandByTile(ti_start.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)))
return CMD_ERROR;
cost = ret;
@@ -261,7 +263,7 @@
/* Try and clear the end landscape */
- if ((ret=DoCommandByTile(ti_end.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)) == CMD_ERROR)
+ if (CmdFailed(ret = DoCommandByTile(ti_end.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)))
return CMD_ERROR;
cost += ret;
@@ -338,7 +340,7 @@
} else {
not_valid_below:;
/* try and clear the middle landscape */
- if ((ret=DoCommandByTile(ti.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)) == CMD_ERROR)
+ if (CmdFailed(ret = DoCommandByTile(ti.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR)))
return CMD_ERROR;
cost += ret;
m5 = 0xC0;