Mercurial > hg > openttd
changeset 3060:818f4d1e734e draft
(svn r3649) Turn several if-cascades into switch()es
author | tron <tron@openttd.org> |
---|---|
date | Tue, 21 Feb 2006 18:07:35 +0000 |
parents | ae228ba30d67 |
children | 6c54002c8ce6 |
files | road_cmd.c |
diffstat | 1 files changed, 295 insertions(+), 247 deletions(-) [+] |
line wrap: on
line diff
--- a/road_cmd.c +++ b/road_cmd.c @@ -34,13 +34,11 @@ case MP_STREET: b = _m[tile].m5; - if ((b & 0xF0) == 0) { - } else if (IsLevelCrossing(tile)) { - b = (b&8)?5:10; - } else if ((b & 0xF0) == 0x20) { - return (~b & 3) == i; - } else { - return false; + switch (b & 0xF0) { + case 0: break; // normal road + case 1: b = (b & 8 ? 5 : 10); break; // level crossing + case 2: return (~b & 3) == i; // depot + default: return false; } break; @@ -177,90 +175,97 @@ if (!b) return CMD_ERROR; } - if (ti.type == MP_TUNNELBRIDGE) { - if (!EnsureNoVehicleZ(tile, TilePixelHeight(tile))) - return CMD_ERROR; - - if ((ti.map5 & 0xE9) == 0xE8) { - if (pieces & 10) goto return_error; - } else if ((ti.map5 & 0xE9) == 0xE9) { - if (pieces & 5) goto return_error; - } else - goto return_error; - - cost = _price.remove_road * 2; + switch (ti.type) { + case MP_TUNNELBRIDGE: + if (!EnsureNoVehicleZ(tile, TilePixelHeight(tile))) return CMD_ERROR; - if (flags & DC_EXEC) { - ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM); - _m[tile].m5 = ti.map5 & 0xC7; - SetTileOwner(tile, OWNER_NONE); - MarkTileDirtyByTile(tile); - } - return cost; - } else if (ti.type == MP_STREET) { - // check if you're allowed to remove the street owned by a town - // removal allowance depends on difficulty setting - if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return CMD_ERROR; - - // XXX - change cascading ifs to switch when doing rewrite - if ((ti.map5 & 0xF0) == 0) { // normal road - byte c = pieces, t2; - - if (ti.tileh != 0 && (ti.map5 == 5 || ti.map5 == 10)) { - c |= (c & 0xC) >> 2; - c |= (c & 0x3) << 2; + if ((ti.map5 & 0xE9) == 0xE8) { + if (pieces & 10) goto return_error; + } else if ((ti.map5 & 0xE9) == 0xE9) { + if (pieces & 5) goto return_error; + } else { + goto return_error; } - // limit the bits to delete to the existing bits. - if ((c &= ti.map5) == 0) goto return_error; - - // calculate the cost - t2 = c; - cost = 0; - do { - if (t2 & 1) cost += _price.remove_road; - } while (t2 >>= 1); + cost = _price.remove_road * 2; if (flags & DC_EXEC) { ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM); - - _m[tile].m5 ^= c; - if (GB(_m[tile].m5, 0, 4) == 0) { - DoClearSquare(tile); - } else { - MarkTileDirtyByTile(tile); - } + _m[tile].m5 = ti.map5 & 0xC7; + SetTileOwner(tile, OWNER_NONE); + MarkTileDirtyByTile(tile); } return cost; - } else if ((ti.map5 & 0xE0) == 0) { // railroad crossing - byte c; + + case MP_STREET: + // check if you're allowed to remove the street owned by a town + // removal allowance depends on difficulty setting + if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return CMD_ERROR; + + switch (GB(ti.map5, 4, 4)) { + case 0: { // normal road + byte c = pieces, t2; + + if (ti.tileh != 0 && (ti.map5 == 5 || ti.map5 == 10)) { + c |= (c & 0xC) >> 2; + c |= (c & 0x3) << 2; + } + + // limit the bits to delete to the existing bits. + if ((c &= ti.map5) == 0) goto return_error; + + // calculate the cost + t2 = c; + cost = 0; + do { + if (t2 & 1) cost += _price.remove_road; + } while (t2 >>= 1); + + if (flags & DC_EXEC) { + ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM); - if (!(ti.map5 & 8)) { - c = 2; - if (pieces & 5) goto return_error; - } else { - c = 1; - if (pieces & 10) goto return_error; + _m[tile].m5 ^= c; + if (GB(_m[tile].m5, 0, 4) == 0) { + DoClearSquare(tile); + } else { + MarkTileDirtyByTile(tile); + } + } + return cost; + } + + case 1: { // level crossing + byte c; + + if (!(ti.map5 & 8)) { + c = 2; + if (pieces & 5) goto return_error; + } else { + c = 1; + if (pieces & 10) goto return_error; + } + + cost = _price.remove_road * 2; + if (flags & DC_EXEC) { + ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM); + + ModifyTile(tile, + MP_SETTYPE(MP_RAILWAY) | + MP_MAP2_CLEAR | MP_MAP3LO | MP_MAP3HI_CLEAR | MP_MAP5, + _m[tile].m4 & 0xF, /* map3_lo */ + c /* map5 */ + ); + } + return cost; + } + + default: // depot + goto return_error; } - cost = _price.remove_road * 2; - if (flags & DC_EXEC) { - ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM); - - ModifyTile(tile, - MP_SETTYPE(MP_RAILWAY) | - MP_MAP2_CLEAR | MP_MAP3LO | MP_MAP3HI_CLEAR | MP_MAP5, - _m[tile].m4 & 0xF, /* map3_lo */ - c /* map5 */ - ); - } - return cost; - } else - goto return_error; - - } else { + default: return_error:; - return_cmd_error(INVALID_STRING_ID); + return_cmd_error(INVALID_STRING_ID); } } @@ -366,82 +371,88 @@ // allow building road under bridge if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile)) return CMD_ERROR; - if (ti.type == MP_STREET) { - if (!(ti.map5 & 0xF0)) { - if ((pieces & (byte)ti.map5) == pieces) - return_cmd_error(STR_1007_ALREADY_BUILT); - existing = ti.map5; - } else { - if (!(ti.map5 & 0xE0) && pieces != ((ti.map5 & 8) ? 5 : 10)) - return_cmd_error(STR_1007_ALREADY_BUILT); - goto do_clear; - } - } else if (ti.type == MP_RAILWAY) { - byte m5; + switch (ti.type) { + case MP_STREET: + if (!(ti.map5 & 0xF0)) { + if ((pieces & (byte)ti.map5) == pieces) + return_cmd_error(STR_1007_ALREADY_BUILT); + existing = ti.map5; + } else { + if (!(ti.map5 & 0xE0) && pieces != ((ti.map5 & 8) ? 5 : 10)) + return_cmd_error(STR_1007_ALREADY_BUILT); + goto do_clear; + } + break; + + case MP_RAILWAY: { + byte m5; + + if (IsSteepTileh(ti.tileh)) { // very steep tile + return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); + } - if (IsSteepTileh(ti.tileh)) { // very steep tile - return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); - } - - if (!_valid_tileh_slopes_road[2][ti.tileh]) { // prevent certain slopes - return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); - } + if (!_valid_tileh_slopes_road[2][ti.tileh]) { // prevent certain slopes + return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); + } - if (ti.map5 == 2) { - if (pieces & 5) goto do_clear; - m5 = 0x10; - } else if (ti.map5 == 1) { - if (pieces & 10) goto do_clear; - m5 = 0x18; - } else { - goto do_clear; + if (ti.map5 == 2) { + if (pieces & 5) goto do_clear; + m5 = 0x10; + } else if (ti.map5 == 1) { + if (pieces & 10) goto do_clear; + m5 = 0x18; + } else { + goto do_clear; + } + + if (flags & DC_EXEC) { + ModifyTile(tile, + MP_SETTYPE(MP_STREET) | + MP_MAP2 | MP_MAP3LO | MP_MAP3HI | MP_MAP5, + p2, + _current_player, /* map3_lo */ + _m[tile].m3 & 0xF, /* map3_hi */ + m5 /* map5 */ + ); + } + return _price.build_road * 2; } - if (flags & DC_EXEC) { - ModifyTile(tile, - MP_SETTYPE(MP_STREET) | - MP_MAP2 | MP_MAP3LO | MP_MAP3HI | MP_MAP5, - p2, - _current_player, /* map3_lo */ - _m[tile].m3 & 0xF, /* map3_hi */ - m5 /* map5 */ - ); - } - return _price.build_road * 2; - } else if (ti.type == MP_TUNNELBRIDGE) { - /* check for flat land */ - if (IsSteepTileh(ti.tileh)) { // very steep tile - return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); - } + case MP_TUNNELBRIDGE: + /* check for flat land */ + if (IsSteepTileh(ti.tileh)) { // very steep tile + return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); + } - /* is this middle part of a bridge? */ - if ((ti.map5 & 0xC0) != 0xC0) goto do_clear; + /* is this middle part of a bridge? */ + if ((ti.map5 & 0xC0) != 0xC0) goto do_clear; - /* only allow roads pertendicular to bridge */ - if (((pieces & 5U) != 0) == ((ti.map5 & 0x01U) != 0)) goto do_clear; + /* only allow roads pertendicular to bridge */ + if (((pieces & 5U) != 0) == ((ti.map5 & 0x01U) != 0)) goto do_clear; - /* check if clear land under bridge */ - if ((ti.map5 & 0xF8) == 0xE8) { /* road under bridge */ - return_cmd_error(STR_1007_ALREADY_BUILT); - } else if ((ti.map5 & 0xE0) == 0xE0) { /* other transport route under bridge */ - return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK); - } else if ((ti.map5 & 0xF8) == 0xC8) { /* water under bridge */ - return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER); - } + /* check if clear land under bridge */ + if ((ti.map5 & 0xF8) == 0xE8) { /* road under bridge */ + return_cmd_error(STR_1007_ALREADY_BUILT); + } else if ((ti.map5 & 0xE0) == 0xE0) { /* other transport route under bridge */ + return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK); + } else if ((ti.map5 & 0xF8) == 0xC8) { /* water under bridge */ + return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER); + } - /* all checked, can build road now! */ - cost = _price.build_road * 2; - if (flags & DC_EXEC) { - ModifyTile(tile, - MP_MAPOWNER_CURRENT | MP_MAP5, - (ti.map5 & 0xC7) | 0x28 // map5 - ); - } - return cost; - } else { + /* all checked, can build road now! */ + cost = _price.build_road * 2; + if (flags & DC_EXEC) { + ModifyTile(tile, + MP_MAPOWNER_CURRENT | MP_MAP5, + (ti.map5 & 0xC7) | 0x28 // map5 + ); + } + return cost; + + default: do_clear:; - if (CmdFailed(DoCommandByTile(tile, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR))) - return CMD_ERROR; + if (CmdFailed(DoCommandByTile(tile, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR))) + return CMD_ERROR; } cost = CheckRoadSlope(ti.tileh, &pieces, existing); @@ -680,33 +691,41 @@ static int32 ClearTile_Road(TileIndex tile, byte flags) { - int32 ret; byte m5 = _m[tile].m5; - if ( (m5 & 0xF0) == 0) { - byte b = m5 & 0xF; + switch (GB(_m[tile].m5, 4, 4)) { + case 0: { // normal road + byte b = m5 & 0xF; - if (! ((1 << b) & (M(1)|M(2)|M(4)|M(8))) ) { - if ((!(flags & DC_AI_BUILDING) || !IsTileOwner(tile, OWNER_TOWN)) && flags & DC_AUTO) + if (!((1 << b) & (M(1)|M(2)|M(4)|M(8))) && + (!(flags & DC_AI_BUILDING) || !IsTileOwner(tile, OWNER_TOWN)) && + flags & DC_AUTO) { return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST); - } - return DoCommandByTile(tile, b, 0, flags, CMD_REMOVE_ROAD); - } else if ( (m5 & 0xE0) == 0) { - if (flags & DC_AUTO) - return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST); - - ret = DoCommandByTile(tile, (m5&8)?5:10, 0, flags, CMD_REMOVE_ROAD); - if (CmdFailed(ret)) return CMD_ERROR; - - if (flags & DC_EXEC) { - DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); + } + return DoCommandByTile(tile, b, 0, flags, CMD_REMOVE_ROAD); } - return ret; - } else { - if (flags & DC_AUTO) - return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED); - return RemoveRoadDepot(tile,flags); + case 1: { // level crossing + int32 ret; + + if (flags & DC_AUTO) { + return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST); + } + + ret = DoCommandByTile(tile, (m5 & 8 ? 5 : 10), 0, flags, CMD_REMOVE_ROAD); + if (CmdFailed(ret)) return CMD_ERROR; + + if (flags & DC_EXEC) { + DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); + } + return ret; + } + + default: // depot + if (flags & DC_AUTO) { + return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED); + } + return RemoveRoadDepot(tile, flags); } } @@ -825,54 +844,59 @@ PalSpriteID image; uint16 m2; - if ( (ti->map5 & 0xF0) == 0) { // if it is a road the upper 4 bits are 0 - DrawRoadBits(ti, GB(ti->map5, 0, 4), GB(_m[ti->tile].m4, 4, 3), HASBIT(_m[ti->tile].m4, 7), false); - } else if ( (ti->map5 & 0xE0) == 0) { // railroad crossing - int f = GetRoadFoundation(ti->tileh, ti->map5 & 0xF); - if (f) DrawFoundation(ti, f); + switch (GB(ti->map5, 4, 4)) { + case 0: // normal road + DrawRoadBits(ti, GB(ti->map5, 0, 4), GB(_m[ti->tile].m4, 4, 3), HASBIT(_m[ti->tile].m4, 7), false); + break; - image = GetRailTypeInfo(GB(_m[ti->tile].m4, 0, 4))->base_sprites.crossing; + case 1: { // level crossing + int f = GetRoadFoundation(ti->tileh, ti->map5 & 0xF); + if (f) DrawFoundation(ti, f); - if (GB(ti->map5, 3, 1) == 0) image++; /* direction */ + image = GetRailTypeInfo(GB(_m[ti->tile].m4, 0, 4))->base_sprites.crossing; + + if (GB(ti->map5, 3, 1) == 0) image++; /* direction */ - if ( (ti->map5 & 4) != 0) - image += 2; + if ((ti->map5 & 4) != 0) image += 2; - if ( _m[ti->tile].m4 & 0x80) { - image += 8; - } else { - m2 = GB(_m[ti->tile].m4, 4, 3); - if (m2 == 0) image |= PALETTE_TO_BARE_LAND; - if (m2 > 1) image += 4; + if ( _m[ti->tile].m4 & 0x80) { + image += 8; + } else { + m2 = GB(_m[ti->tile].m4, 4, 3); + if (m2 == 0) image |= PALETTE_TO_BARE_LAND; + if (m2 > 1) image += 4; + } + + DrawGroundSprite(image); + break; } - DrawGroundSprite(image); - } else { - uint32 ormod; - PlayerID player; - const DrawRoadSeqStruct *drss; + default: { // depot + uint32 ormod; + PlayerID player; + const DrawRoadSeqStruct* drss; - if (ti->tileh != 0) { DrawFoundation(ti, ti->tileh); } + if (ti->tileh != 0) DrawFoundation(ti, ti->tileh); - ormod = PALETTE_TO_GREY; //was this a bug/problem? - player = GetTileOwner(ti->tile); - if (player < MAX_PLAYERS) - ormod = PLAYER_SPRITE_COLOR(player); + ormod = PALETTE_TO_GREY; //was this a bug/problem? + player = GetTileOwner(ti->tile); + if (player < MAX_PLAYERS) ormod = PLAYER_SPRITE_COLOR(player); + + drss = _road_display_datas[ti->map5 & 0xF]; - drss = _road_display_datas[ti->map5 & 0xF]; + DrawGroundSprite(drss++->image); - DrawGroundSprite(drss++->image); - - for (; drss->image != 0; drss++) { - uint32 image = drss->image; + for (; drss->image != 0; drss++) { + uint32 image = drss->image; - if (image & PALETTE_MODIFIER_COLOR) - image |= ormod; - if (_display_opt & DO_TRANS_BUILDINGS) // show transparent depots - MAKE_TRANSPARENT(image); + if (image & PALETTE_MODIFIER_COLOR) image |= ormod; + if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image); - AddSortableSpriteToDraw(image, ti->x | drss->subcoord_x, - ti->y | drss->subcoord_y, drss->width, drss->height, 0x14, ti->z); + AddSortableSpriteToDraw(image, ti->x | drss->subcoord_x, + ti->y | drss->subcoord_y, drss->width, drss->height, 0x14, ti->z + ); + } + break; } } } @@ -908,19 +932,25 @@ // check if it's a foundation if (ti->tileh != 0) { - if ((ti->map5 & 0xE0) == 0) { /* road or crossing */ - uint f = GetRoadFoundation(ti->tileh, ti->map5 & 0x3F); - if (f != 0) { - if (f < 15) { - // leveled foundation - return z + 8; + switch (GB(ti->map5, 4, 4)) { + case 0: // normal road + case 1: { // level crossing + uint f = GetRoadFoundation(ti->tileh, ti->map5 & 0x3F); + if (f != 0) { + if (f < 15) { + // leveled foundation + return z + 8; + } + // inclined foundation + th = _inclined_tileh[f - 15]; } - // inclined foundation - th = _inclined_tileh[f - 15]; + break; } - } else if ((ti->map5 & 0xF0) == 0x20) { - // depot - return z + 8; + + case 2: // depot + return z + 8; + + default: break; } return GetPartialZ(ti->x&0xF, ti->y&0xF, th) + z; } @@ -931,19 +961,25 @@ { // check if it's a foundation if (ti->tileh != 0) { - if ((ti->map5 & 0xE0) == 0) { /* road or crossing */ - uint f = GetRoadFoundation(ti->tileh, ti->map5 & 0x3F); - if (f != 0) { - if (f < 15) { - // leveled foundation - return 0; + switch (GB(ti->map5, 4, 4)) { + case 0: // normal road + case 1: { // level crossing + uint f = GetRoadFoundation(ti->tileh, ti->map5 & 0x3F); + if (f != 0) { + if (f < 15) { + // leveled foundation + return 0; + } + // inclined foundation + return _inclined_tileh[f - 15]; } - // inclined foundation - return _inclined_tileh[f - 15]; + break; } - } else if ((ti->map5 & 0xF0) == 0x20) { - // depot - return 0; + + case 2: // depot + return 0; + + default: break; } } return ti->tileh; @@ -1125,20 +1161,26 @@ static uint32 VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y) { - if (IsLevelCrossing(tile)) { - if (v->type == VEH_Train && GB(_m[tile].m5, 2, 1) == 0) { - /* train crossing a road */ - SndPlayVehicleFx(SND_0E_LEVEL_CROSSING, v); - SB(_m[tile].m5, 2, 1, 1); - MarkTileDirtyByTile(tile); - } - } else if (GB(_m[tile].m5, 4, 4) == 2) { - if (v->type == VEH_Road && v->u.road.frame == 11) { - if (_roadveh_enter_depot_unk0[GB(_m[tile].m5, 0, 2)] == v->u.road.state) { - RoadVehEnterDepot(v); - return 4; + switch (GB(_m[tile].m5, 4, 4)) { + case 1: // level crossing + if (v->type == VEH_Train && GB(_m[tile].m5, 2, 1) == 0) { + /* train crossing a road */ + SndPlayVehicleFx(SND_0E_LEVEL_CROSSING, v); + SB(_m[tile].m5, 2, 1, 1); + MarkTileDirtyByTile(tile); } - } + break; + + case 2: // depot + if (v->type == VEH_Road && v->u.road.frame == 11) { + if (_roadveh_enter_depot_unk0[GB(_m[tile].m5, 0, 2)] == v->u.road.state) { + RoadVehEnterDepot(v); + return 4; + } + } + break; + + default: break; } return 0; } @@ -1164,15 +1206,21 @@ if (new_player != OWNER_SPECTATOR) { SetTileOwner(tile, new_player); } else { - if (GB(_m[tile].m5, 4, 4) == 0) { - SetTileOwner(tile, OWNER_NONE); - } else if (IsLevelCrossing(tile)) { - _m[tile].m5 = (_m[tile].m5&8) ? 0x5 : 0xA; - SetTileOwner(tile, _m[tile].m3); - _m[tile].m3 = 0; - _m[tile].m4 &= 0x80; - } else { - DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR); + switch (GB(_m[tile].m5, 4, 4)) { + case 0: // normal road + SetTileOwner(tile, OWNER_NONE); + break; + + case 1: // level crossing + _m[tile].m5 = (_m[tile].m5&8) ? 0x5 : 0xA; + SetTileOwner(tile, _m[tile].m3); + _m[tile].m3 = 0; + _m[tile].m4 &= 0x80; + break; + + default: // depot + DoCommandByTile(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR); + break; } } }