From 7a0071cc531b7c3fe03293360acec28e889a4532 Mon Sep 17 00:00:00 2001 From: tron Date: Sun, 12 Mar 2006 12:19:25 +0000 Subject: (svn r3829) Reduce the use of _error_message by directly returning error codes instead of using this global variable --- aircraft_cmd.c | 11 +++------ station_cmd.c | 35 +++++++++++++++-------------- train_cmd.c | 19 ++++++---------- tree_cmd.c | 13 +++++++---- tunnelbridge_cmd.c | 18 +++++++-------- unmovable_cmd.c | 8 ++++--- water_cmd.c | 66 ++++++++++++++++++++++++++++-------------------------- 7 files changed, 84 insertions(+), 86 deletions(-) diff --git a/aircraft_cmd.c b/aircraft_cmd.c index da812a4bf..42000164b 100644 --- a/aircraft_cmd.c +++ b/aircraft_cmd.c @@ -315,12 +315,7 @@ bool IsAircraftHangarTile(TileIndex tile) bool CheckStoppedInHangar(const Vehicle* v) { - if (!(v->vehstatus & VS_STOPPED) || !IsAircraftHangarTile(v->tile)) { - _error_message = STR_A01B_AIRCRAFT_MUST_BE_STOPPED; - return false; - } - - return true; + return v->vehstatus & VS_STOPPED && IsAircraftHangarTile(v->tile); } @@ -346,8 +341,8 @@ int32 CmdSellAircraft(int x, int y, uint32 flags, uint32 p1, uint32 p2) v = GetVehicle(p1); - if (v->type != VEH_Aircraft || !CheckOwnership(v->owner) || !CheckStoppedInHangar(v)) - return CMD_ERROR; + if (v->type != VEH_Aircraft || !CheckOwnership(v->owner)) return CMD_ERROR; + if (!CheckStoppedInHangar(v)) return_cmd_error(STR_A01B_AIRCRAFT_MUST_BE_STOPPED); SET_EXPENSES_TYPE(EXPENSES_NEW_VEHICLES); diff --git a/station_cmd.c b/station_cmd.c index b40657191..23b63091b 100644 --- a/station_cmd.c +++ b/station_cmd.c @@ -764,8 +764,7 @@ int32 CheckFlatLandBelow(TileIndex tile, uint w, uint h, uint flags, uint invali */ if (IsSteepTileh(tileh) || ((_is_old_ai_player || !_patches.build_on_slopes) && tileh != 0)) { - _error_message = STR_0007_FLAT_LAND_REQUIRED; - return CMD_ERROR; + return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } flat_z = z; @@ -775,8 +774,7 @@ int32 CheckFlatLandBelow(TileIndex tile, uint w, uint h, uint flags, uint invali (invalid_dirs&2 && !(tileh & 6) && h_cur == 1) || (invalid_dirs&4 && !(tileh & 3) && w_cur == 1) || (invalid_dirs&8 && !(tileh & 9) && (uint)h_cur == h)) { - _error_message = STR_0007_FLAT_LAND_REQUIRED; - return CMD_ERROR; + return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } cost += _price.terraform; flat_z += 8; @@ -787,8 +785,7 @@ int32 CheckFlatLandBelow(TileIndex tile, uint w, uint h, uint flags, uint invali // first tile allowed_z = flat_z; } else if (allowed_z != flat_z) { - _error_message = STR_0007_FLAT_LAND_REQUIRED; - return CMD_ERROR; + return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); } // if station is set, then we have special handling to allow building on top of already existing stations. @@ -796,20 +793,18 @@ int32 CheckFlatLandBelow(TileIndex tile, uint w, uint h, uint flags, uint invali // on exactly that station. if (station != NULL && IsTileType(tile_cur, MP_STATION)) { if (_m[tile_cur].m5 >= 8) { - _error_message = ClearTile_Station(tile_cur, DC_AUTO); // get error message - return CMD_ERROR; + return ClearTile_Station(tile_cur, DC_AUTO); // get error message } else { StationID st = _m[tile_cur].m2; if (*station == INVALID_STATION) { *station = st; } else if (*station != st) { - _error_message = STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING; - return CMD_ERROR; + return_cmd_error(STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING); } } } else { ret = DoCommandByTile(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR); - if (CmdFailed(ret)) return CMD_ERROR; + if (CmdFailed(ret)) return ret; cost += ret; } END_TILE_LOOP(tile_cur, w, h, tile) @@ -969,7 +964,8 @@ int32 CmdBuildRailroadStation(int x, int y, uint32 flags, uint32 p1, uint32 p2) est = INVALID_STATION; // 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 (CmdFailed(ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags&~DC_EXEC, 5 << axis, _patches.nonuniform_stations ? &est : NULL))) return CMD_ERROR; + ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags & ~DC_EXEC, 5 << axis, _patches.nonuniform_stations ? &est : NULL); + if (CmdFailed(ret)) return ret; cost = ret + (numtracks * _price.train_station_track + _price.train_station_length) * plat_len; // Make sure there are no similar stations around us. @@ -1021,7 +1017,8 @@ int32 CmdBuildRailroadStation(int x, int y, uint32 flags, uint32 p1, uint32 p2) // 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 (CmdFailed(CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _patches.nonuniform_stations ? &est : NULL))) return CMD_ERROR; + ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _patches.nonuniform_stations ? &est : NULL); + if (CmdFailed(ret)) return ret; st->train_tile = finalvalues[0]; if (!st->facilities) st->xy = finalvalues[0]; @@ -1305,6 +1302,7 @@ int32 CmdBuildRoadStop(int x, int y, uint32 flags, uint32 p1, uint32 p2) RoadStop *prev = NULL; TileIndex tile; int32 cost; + int32 ret; bool type = !!p2; /* Saveguard the parameters */ @@ -1317,8 +1315,9 @@ int32 CmdBuildRoadStop(int x, int y, uint32 flags, uint32 p1, uint32 p2) if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR; - cost = CheckFlatLandBelow(tile, 1, 1, flags, 1 << p1, NULL); - if (CmdFailed(cost)) return CMD_ERROR; + ret = CheckFlatLandBelow(tile, 1, 1, flags, 1 << p1, NULL); + if (CmdFailed(ret)) return ret; + cost = ret; st = GetStationAround(tile, 1, 1, -1); if (st == CHECK_STATIONS_ERR) return CMD_ERROR; @@ -1522,6 +1521,7 @@ int32 CmdBuildAirport(int x, int y, uint32 flags, uint32 p1, uint32 p2) Town *t; Station *st; int32 cost; + int32 ret; int w, h; bool airport_upgrade = true; @@ -1553,8 +1553,9 @@ int32 CmdBuildAirport(int x, int y, uint32 flags, uint32 p1, uint32 p2) w = _airport_size_x[p1]; h = _airport_size_y[p1]; - cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL); - if (CmdFailed(cost)) return CMD_ERROR; + ret = CheckFlatLandBelow(tile, w, h, flags, 0, NULL); + if (CmdFailed(ret)) return ret; + cost = ret; st = GetStationAround(tile, w, h, -1); if (st == CHECK_STATIONS_ERR) return CMD_ERROR; diff --git a/train_cmd.c b/train_cmd.c index fe65c5309..fa24f4cbd 100644 --- a/train_cmd.c +++ b/train_cmd.c @@ -776,18 +776,14 @@ int32 CmdBuildRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) /* Check if all the wagons of the given train are in a depot, returns the - * number of cars (including loco) then. If not, sets the error message to - * STR_881A_TRAINS_CAN_ONLY_BE_ALTERED and returns -1 */ + * number of cars (including loco) then. If not it returns -1 */ int CheckTrainStoppedInDepot(const Vehicle *v) { int count; TileIndex tile = v->tile; /* check if stopped in a depot */ - if (!IsTileDepotType(tile, TRANSPORT_RAIL) || v->cur_speed != 0) { - _error_message = STR_881A_TRAINS_CAN_ONLY_BE_ALTERED; - return -1; - } + if (!IsTileDepotType(tile, TRANSPORT_RAIL) || v->cur_speed != 0) return -1; count = 0; for (; v != NULL; v = v->next) { @@ -797,7 +793,6 @@ int CheckTrainStoppedInDepot(const Vehicle *v) if (!IsArticulatedPart(v)) count++; if (v->u.rail.track != 0x80 || v->tile != tile || (IsFrontEngine(v) && !(v->vehstatus & VS_STOPPED))) { - _error_message = STR_881A_TRAINS_CAN_ONLY_BE_ALTERED; return -1; } } @@ -983,7 +978,7 @@ int32 CmdMoveRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) // check if all vehicles in the source train are stopped inside a depot. src_len = CheckTrainStoppedInDepot(src_head); - if (src_len < 0) return CMD_ERROR; + if (src_len < 0) return_cmd_error(STR_881A_TRAINS_CAN_ONLY_BE_ALTERED); // check the destination row if the source and destination aren't the same. if (src_head != dst_head) { @@ -992,7 +987,7 @@ int32 CmdMoveRailVehicle(int x, int y, uint32 flags, uint32 p1, uint32 p2) if (dst_head != NULL) { // check if all vehicles in the dest train are stopped. dst_len = CheckTrainStoppedInDepot(dst_head); - if (dst_len < 0) return CMD_ERROR; + if (dst_len < 0) return_cmd_error(STR_881A_TRAINS_CAN_ONLY_BE_ALTERED); assert(dst_head->tile == src_head->tile); } @@ -1217,7 +1212,9 @@ int32 CmdSellRailWagon(int x, int y, uint32 flags, uint32 p1, uint32 p2) first = GetFirstVehicleInChain(v); // make sure the vehicle is stopped in the depot - if (CheckTrainStoppedInDepot(first) < 0) return CMD_ERROR; + if (CheckTrainStoppedInDepot(first) < 0) { + return_cmd_error(STR_881A_TRAINS_CAN_ONLY_BE_ALTERED); + } if (IsMultiheaded(v) && !IsTrainEngine(v)) return_cmd_error(STR_REAR_ENGINE_FOLLOW_FRONT_ERROR); @@ -1593,8 +1590,6 @@ static void ReverseTrainDirection(Vehicle *v) if (v->type != VEH_Train || !CheckOwnership(v->owner)) return CMD_ERROR; - _error_message = STR_EMPTY; - // if (v->u.rail.track & 0x80 || IsTileDepotType(v->tile, TRANSPORT_RAIL)) // return CMD_ERROR; diff --git a/tree_cmd.c b/tree_cmd.c index 5742f916e..7a699efdb 100644 --- a/tree_cmd.c +++ b/tree_cmd.c @@ -130,6 +130,7 @@ void GenerateTrees(void) */ int32 CmdPlantTree(int ex, int ey, uint32 flags, uint32 p1, uint32 p2) { + StringID msg = INVALID_STRING_ID; int32 cost; int sx, sy, x, y; @@ -158,7 +159,7 @@ int32 CmdPlantTree(int ex, int ey, uint32 flags, uint32 p1, uint32 p2) case MP_TREES: // no more space for trees? if (_game_mode != GM_EDITOR && GetTreeCount(tile) == 3) { - _error_message = STR_2803_TREE_ALREADY_HERE; + msg = STR_2803_TREE_ALREADY_HERE; continue; } @@ -172,7 +173,7 @@ int32 CmdPlantTree(int ex, int ey, uint32 flags, uint32 p1, uint32 p2) case MP_CLEAR: if (!IsTileOwner(tile, OWNER_NONE)) { - _error_message = STR_2804_SITE_UNSUITABLE; + msg = STR_2804_SITE_UNSUITABLE; continue; } @@ -213,13 +214,17 @@ int32 CmdPlantTree(int ex, int ey, uint32 flags, uint32 p1, uint32 p2) break; default: - _error_message = STR_2804_SITE_UNSUITABLE; + msg = STR_2804_SITE_UNSUITABLE; break; } } } - return (cost == 0) ? CMD_ERROR : cost; + if (cost == 0) { + return_cmd_error(msg); + } else { + return cost; + } } typedef struct TreeListEnt { diff --git a/tunnelbridge_cmd.c b/tunnelbridge_cmd.c index 84a1ec4a1..f43728695 100644 --- a/tunnelbridge_cmd.c +++ b/tunnelbridge_cmd.c @@ -282,8 +282,8 @@ int32 CmdBuildBridge(int x, int y, uint32 flags, uint32 p1, uint32 p2) /* Try and clear the start landscape */ - if (CmdFailed(ret = DoCommandByTile(ti_start.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR))) - return CMD_ERROR; + ret = DoCommandByTile(ti_start.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); + if (CmdFailed(ret)) return ret; cost = ret; // true - bridge-start-tile, false - bridge-end-tile @@ -295,7 +295,7 @@ int32 CmdBuildBridge(int x, int y, uint32 flags, uint32 p1, uint32 p2) /* Try and clear the end landscape */ ret = DoCommandByTile(ti_end.tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); - if (CmdFailed(ret)) return CMD_ERROR; + if (CmdFailed(ret)) return ret; cost += ret; // false - end tile slope check @@ -336,15 +336,13 @@ int32 CmdBuildBridge(int x, int y, uint32 flags, uint32 p1, uint32 p2) tile += delta; - _error_message = STR_5009_LEVEL_LAND_OR_WATER_REQUIRED; - if (GetTileSlope(tile, &z) != 0 && z >= ti_start.z) return CMD_ERROR; + if (GetTileSlope(tile, &z) != 0 && z >= ti_start.z) { + return_cmd_error(STR_5009_LEVEL_LAND_OR_WATER_REQUIRED); + } switch (GetTileType(tile)) { case MP_WATER: - if (!EnsureNoVehicle(tile)) { - _error_message = STR_980E_SHIP_IN_THE_WAY; - return CMD_ERROR; - } + if (!EnsureNoVehicle(tile)) return_cmd_error(STR_980E_SHIP_IN_THE_WAY); if (_m[tile].m5 > 1) goto not_valid_below; m5 = 0xC8; break; @@ -368,7 +366,7 @@ int32 CmdBuildBridge(int x, int y, uint32 flags, uint32 p1, uint32 p2) not_valid_below:; /* try and clear the middle landscape */ ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); - if (CmdFailed(ret)) return CMD_ERROR; + if (CmdFailed(ret)) return ret; cost += ret; m5 = 0xC0; break; diff --git a/unmovable_cmd.c b/unmovable_cmd.c index 6dddbb502..3798265ec 100644 --- a/unmovable_cmd.c +++ b/unmovable_cmd.c @@ -69,14 +69,16 @@ int32 CmdBuildCompanyHQ(int x, int y, uint32 flags, uint32 p1, uint32 p2) TileIndex tile = TileVirtXY(x, y); Player *p = GetPlayer(_current_player); int cost; + int32 ret; SET_EXPENSES_TYPE(EXPENSES_PROPERTY); - cost = CheckFlatLandBelow(tile, 2, 2, flags, 0, NULL); - if (CmdFailed(cost)) return CMD_ERROR; + ret = CheckFlatLandBelow(tile, 2, 2, flags, 0, NULL); + if (CmdFailed(ret)) return ret; + cost = ret; if (p->location_of_house != 0) { /* Moving HQ */ - int32 ret = DestroyCompanyHQ(p->location_of_house, flags); + ret = DestroyCompanyHQ(p->location_of_house, flags); if (CmdFailed(ret)) return CMD_ERROR; cost += ret; } diff --git a/water_cmd.c b/water_cmd.c index cd7087e3b..24a08db03 100644 --- a/water_cmd.c +++ b/water_cmd.c @@ -236,43 +236,45 @@ int32 CmdBuildCanal(int x, int y, uint32 flags, uint32 p1, uint32 p2) BEGIN_TILE_LOOP(tile, size_x, size_y, TileXY(sx, sy)) { if (GetTileSlope(tile, NULL) != 0) return_cmd_error(STR_0007_FLAT_LAND_REQUIRED); - // can't make water of water! - if (IsTileType(tile, MP_WATER)) { - _error_message = STR_1007_ALREADY_BUILT; - } else { - /* is middle piece of a bridge? */ - if (IsTileType(tile, MP_TUNNELBRIDGE) && _m[tile].m5 & 0x40) { /* build under bridge */ - if (_m[tile].m5 & 0x20) // transport route under bridge - return_cmd_error(STR_5800_OBJECT_IN_THE_WAY); - - if (_m[tile].m5 & 0x18) { // already water under bridge - return_cmd_error(STR_1007_ALREADY_BUILT); - } - - if (flags & DC_EXEC) { - // change owner to OWNER_WATER and set land under bridge bit to water - ModifyTile(tile, MP_MAP5 | MP_MAPOWNER, OWNER_WATER, _m[tile].m5 | 0x08); - } - } else { - /* no bridge, try to clear it. */ - int32 ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); - - if (CmdFailed(ret)) return CMD_ERROR; - cost += ret; - - if (flags & DC_EXEC) { - MakeWater(tile); - MarkTileDirtyByTile(tile); - } - } + // can't make water of water! + if (IsTileType(tile, MP_WATER)) continue; - if (flags & DC_EXEC) MarkTilesAroundDirty(tile); + /* is middle piece of a bridge? */ + if (IsTileType(tile, MP_TUNNELBRIDGE) && _m[tile].m5 & 0x40) { /* build under bridge */ + if (_m[tile].m5 & 0x20) // transport route under bridge + return_cmd_error(STR_5800_OBJECT_IN_THE_WAY); + + if (_m[tile].m5 & 0x18) { // already water under bridge + return_cmd_error(STR_1007_ALREADY_BUILT); + } - cost += _price.clear_water; + if (flags & DC_EXEC) { + // change owner to OWNER_WATER and set land under bridge bit to water + ModifyTile(tile, MP_MAP5 | MP_MAPOWNER, OWNER_WATER, _m[tile].m5 | 0x08); } + } else { + /* no bridge, try to clear it. */ + int32 ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); + + if (CmdFailed(ret)) return ret; + cost += ret; + + if (flags & DC_EXEC) { + MakeWater(tile); + MarkTileDirtyByTile(tile); + } + } + + if (flags & DC_EXEC) MarkTilesAroundDirty(tile); + + cost += _price.clear_water; } END_TILE_LOOP(tile, size_x, size_y, 0); - return (cost == 0) ? CMD_ERROR : cost; + if (cost == 0) { + return_cmd_error(STR_1007_ALREADY_BUILT); + } else { + return cost; + } } static int32 ClearTile_Water(TileIndex tile, byte flags) -- cgit v1.2.3-70-g09d2