command_type.h File Reference

Types related to commands. More...

#include "company_type.h"
#include "economy_type.h"
#include "strings_type.h"
#include "tile_type.h"

Go to the source code of this file.

Data Structures
class	CommandCost
	Common return value for all commands. More...
struct	CommandFunctionTraitHelper< CommandCost(*)(DoCommandFlags, Targs...)>
struct	CommandFunctionTraitHelper< Tret< CommandCost, Tretargs... >(*)(DoCommandFlags, Targs...)>

Macros
#define	DEF_CMD_TRAIT(cmd_, proc_, flags_, type_)

Typedefs
using	DoCommandFlags = EnumBitSet< DoCommandFlag, uint16_t >
using	CommandFlags = EnumBitSet< CommandFlag, uint16_t >
typedef std::vector< uint8_t >	CommandDataBuffer
	Storage buffer for serialized command data.
typedef void	CommandCallback(Commands cmd, const CommandCost &result, TileIndex tile)
	Define a callback function for the client, after the command is finished.
typedef void	CommandCallbackData(Commands cmd, const CommandCost &result, const CommandDataBuffer &data, CommandDataBuffer result_data)
	Define a callback function for the client, after the command is finished.

Enumerations
enum	Commands : uint8_t {   CMD_BUILD_RAILROAD_TRACK , CMD_REMOVE_RAILROAD_TRACK , CMD_BUILD_SINGLE_RAIL , CMD_REMOVE_SINGLE_RAIL ,   CMD_LANDSCAPE_CLEAR , CMD_BUILD_BRIDGE , CMD_BUILD_RAIL_STATION , CMD_BUILD_TRAIN_DEPOT ,   CMD_BUILD_SINGLE_SIGNAL , CMD_REMOVE_SINGLE_SIGNAL , CMD_TERRAFORM_LAND , CMD_BUILD_OBJECT ,   CMD_BUILD_OBJECT_AREA , CMD_BUILD_TUNNEL , CMD_REMOVE_FROM_RAIL_STATION , CMD_CONVERT_RAIL ,   CMD_BUILD_RAIL_WAYPOINT , CMD_RENAME_WAYPOINT , CMD_REMOVE_FROM_RAIL_WAYPOINT , CMD_BUILD_ROAD_WAYPOINT ,   CMD_REMOVE_FROM_ROAD_WAYPOINT , CMD_BUILD_ROAD_STOP , CMD_REMOVE_ROAD_STOP , CMD_BUILD_LONG_ROAD ,   CMD_REMOVE_LONG_ROAD , CMD_BUILD_ROAD , CMD_BUILD_ROAD_DEPOT , CMD_CONVERT_ROAD ,   CMD_BUILD_AIRPORT , CMD_BUILD_DOCK , CMD_BUILD_SHIP_DEPOT , CMD_BUILD_BUOY ,   CMD_PLANT_TREE , CMD_BUILD_VEHICLE , CMD_SELL_VEHICLE , CMD_REFIT_VEHICLE ,   CMD_SEND_VEHICLE_TO_DEPOT , CMD_SET_VEHICLE_VISIBILITY , CMD_MOVE_RAIL_VEHICLE , CMD_FORCE_TRAIN_PROCEED ,   CMD_REVERSE_TRAIN_DIRECTION , CMD_CLEAR_ORDER_BACKUP , CMD_MODIFY_ORDER , CMD_SKIP_TO_ORDER ,   CMD_DELETE_ORDER , CMD_INSERT_ORDER , CMD_CHANGE_SERVICE_INT , CMD_BUILD_INDUSTRY ,   CMD_INDUSTRY_SET_FLAGS , CMD_INDUSTRY_SET_EXCLUSIVITY , CMD_INDUSTRY_SET_TEXT , CMD_INDUSTRY_SET_PRODUCTION ,   CMD_SET_COMPANY_MANAGER_FACE , CMD_SET_COMPANY_COLOUR , CMD_INCREASE_LOAN , CMD_DECREASE_LOAN ,   CMD_SET_COMPANY_MAX_LOAN , CMD_WANT_ENGINE_PREVIEW , CMD_ENGINE_CTRL , CMD_RENAME_VEHICLE ,   CMD_RENAME_ENGINE , CMD_RENAME_COMPANY , CMD_RENAME_PRESIDENT , CMD_RENAME_STATION ,   CMD_RENAME_DEPOT , CMD_PLACE_SIGN , CMD_RENAME_SIGN , CMD_TURN_ROADVEH ,   CMD_PAUSE , CMD_BUY_COMPANY , CMD_FOUND_TOWN , CMD_RENAME_TOWN ,   CMD_DO_TOWN_ACTION , CMD_TOWN_CARGO_GOAL , CMD_TOWN_GROWTH_RATE , CMD_TOWN_RATING ,   CMD_TOWN_SET_TEXT , CMD_EXPAND_TOWN , CMD_DELETE_TOWN , CMD_PLACE_HOUSE ,   CMD_ORDER_REFIT , CMD_CLONE_ORDER , CMD_CLEAR_AREA , CMD_MONEY_CHEAT ,   CMD_CHANGE_BANK_BALANCE , CMD_BUILD_CANAL , CMD_CREATE_SUBSIDY , CMD_COMPANY_CTRL ,   CMD_COMPANY_ALLOW_LIST_CTRL , CMD_CUSTOM_NEWS_ITEM , CMD_CREATE_GOAL , CMD_REMOVE_GOAL ,   CMD_SET_GOAL_DESTINATION , CMD_SET_GOAL_TEXT , CMD_SET_GOAL_PROGRESS , CMD_SET_GOAL_COMPLETED ,   CMD_GOAL_QUESTION , CMD_GOAL_QUESTION_ANSWER , CMD_CREATE_STORY_PAGE , CMD_CREATE_STORY_PAGE_ELEMENT ,   CMD_UPDATE_STORY_PAGE_ELEMENT , CMD_SET_STORY_PAGE_TITLE , CMD_SET_STORY_PAGE_DATE , CMD_SHOW_STORY_PAGE ,   CMD_REMOVE_STORY_PAGE , CMD_REMOVE_STORY_PAGE_ELEMENT , CMD_SCROLL_VIEWPORT , CMD_STORY_PAGE_BUTTON ,   CMD_LEVEL_LAND , CMD_BUILD_LOCK , CMD_BUILD_SIGNAL_TRACK , CMD_REMOVE_SIGNAL_TRACK ,   CMD_GIVE_MONEY , CMD_CHANGE_SETTING , CMD_CHANGE_COMPANY_SETTING , CMD_SET_AUTOREPLACE ,   CMD_CLONE_VEHICLE , CMD_START_STOP_VEHICLE , CMD_MASS_START_STOP , CMD_AUTOREPLACE_VEHICLE ,   CMD_DEPOT_SELL_ALL_VEHICLES , CMD_DEPOT_MASS_AUTOREPLACE , CMD_CREATE_GROUP , CMD_DELETE_GROUP ,   CMD_ALTER_GROUP , CMD_ADD_VEHICLE_GROUP , CMD_ADD_SHARED_VEHICLE_GROUP , CMD_REMOVE_ALL_VEHICLES_GROUP ,   CMD_SET_GROUP_FLAG , CMD_SET_GROUP_LIVERY , CMD_MOVE_ORDER , CMD_CHANGE_TIMETABLE ,   CMD_BULK_CHANGE_TIMETABLE , CMD_SET_VEHICLE_ON_TIME , CMD_AUTOFILL_TIMETABLE , CMD_SET_TIMETABLE_START ,   CMD_OPEN_CLOSE_AIRPORT , CMD_CREATE_LEAGUE_TABLE , CMD_CREATE_LEAGUE_TABLE_ELEMENT , CMD_UPDATE_LEAGUE_TABLE_ELEMENT_DATA ,   CMD_UPDATE_LEAGUE_TABLE_ELEMENT_SCORE , CMD_REMOVE_LEAGUE_TABLE_ELEMENT , CMD_END }
	List of commands. More...
enum class	DoCommandFlag : uint8_t {   Execute , Auto , QueryCost , NoWater ,   NoTestTownRating , Bankrupt , AutoReplace , NoCargoCapacityCheck ,   AllTiles , NoModifyTownRating , ForceClearTile }
	List of flags for a command. More...
enum class	CommandFlag : uint8_t {   Server , Spectator , Offline , Auto ,   AllTiles , NoTest , NoWater , ClientID ,   Deity , StrCtrl , NoEst , Location }
	Command flags for the command table _command_proc_table. More...
enum class	CommandType : uint8_t {   LandscapeConstruction , VehicleConstruction , MoneyManagement , VehicleManagement ,   RouteManagement , OtherManagement , CompanySetting , ServerSetting ,   Cheat , End }
	Types of commands we have. More...
enum class	CommandPauseLevel : uint8_t { NoActions , NoConstruction , NoLandscaping , AllActions }
	Different command pause levels. More...

Functions
CommandCost	CommandCostWithParam (StringID str, uint64_t value)
	Return an error status, with string and parameter.
CommandCost	CommandCostWithParam (StringID str, ConvertibleThroughBase auto value)

Detailed Description

Types related to commands.

Definition in file command_type.h.

Macro Definition Documentation

DEF_CMD_TRAIT

#define DEF_CMD_TRAIT	(		cmd_,
			proc_,
			flags_,
			type_
	)

Value:

  template <> struct CommandTraits<cmd_> { \
    using ProcType = decltype(&proc_); \
    using Args = typename CommandFunctionTraitHelper<ProcType>::Args; \
    using RetTypes = typename CommandFunctionTraitHelper<ProcType>::RetTypes; \
    using CbArgs = typename CommandFunctionTraitHelper<ProcType>::CbArgs; \
    using RetCallbackProc = typename CommandFunctionTraitHelper<ProcType>::CbProcType; \
    static constexpr Commands cmd = cmd_; \
    static constexpr auto &proc = proc_; \
    static constexpr CommandFlags flags = flags_; \
    static constexpr CommandType type = type_; \
    static inline constexpr std::string_view name = #proc_; \
  };

Definition at line 463 of file command_type.h.

Typedef Documentation

CommandCallback

typedef void CommandCallback(Commands cmd, const CommandCost &result, TileIndex tile)

Define a callback function for the client, after the command is finished.

Functions of this type are called after the command is finished. The parameters are from the #CommandProc callback type. The boolean parameter indicates if the command succeeded or failed.

Parameters

cmd	The command that was executed
result	The result of the executed command
tile	The tile of the command action

See also

CommandProc

Definition at line 492 of file command_type.h.

CommandCallbackData

typedef void CommandCallbackData(Commands cmd, const CommandCost &result, const CommandDataBuffer &data, CommandDataBuffer result_data)

Define a callback function for the client, after the command is finished.

Functions of this type are called after the command is finished. The parameters are from the #CommandProc callback type. The boolean parameter indicates if the command succeeded or failed.

Parameters

cmd	The command that was executed
result	The result of the executed command
tile	The tile of the command action
data	Additional data of the command
result_data	Additional returned data from the command

See also

CommandProc

Definition at line 508 of file command_type.h.

CommandDataBuffer

typedef std::vector<uint8_t> CommandDataBuffer

Storage buffer for serialized command data.

Definition at line 478 of file command_type.h.

CommandFlags

using CommandFlags = EnumBitSet<CommandFlag, uint16_t>

Definition at line 417 of file command_type.h.

DoCommandFlags

using DoCommandFlags = EnumBitSet<DoCommandFlag, uint16_t>

Definition at line 396 of file command_type.h.

Enumeration Type Documentation

CommandFlag

enum class CommandFlag : uint8_t

strong

Command flags for the command table _command_proc_table.

This enumeration defines flags for the _command_proc_table.

Enumerator
Server	the command can only be initiated by the server
Spectator	the command may be initiated by a spectator
Offline	the command cannot be executed in a multiplayer game; single-player only
Auto	set the DoCommandFlag::Auto flag on this command
AllTiles	allow this command also on MP_VOID tiles
NoTest	the command's output may differ between test and execute due to town rating changes etc.
NoWater	set the DoCommandFlag::NoWater flag on this command
ClientID	set p2 with the ClientID of the sending client.
Deity	the command may be executed by COMPANY_DEITY
StrCtrl	the command's string may contain control strings
NoEst	the command is never estimated.
Location	the command has implicit location argument.

Definition at line 403 of file command_type.h.

CommandPauseLevel

enum class CommandPauseLevel : uint8_t

strong

Different command pause levels.

Enumerator
NoActions	No user actions may be executed.
NoConstruction	No construction actions may be executed.
NoLandscaping	No landscaping actions may be executed.
AllActions	All actions may be executed.

Definition at line 436 of file command_type.h.

Commands

enum Commands : uint8_t

List of commands.

This enum defines all possible commands which can be executed to the game engine. Observing the game like the query-tool or checking the profit of a vehicle don't result in a command which should be executed in the engine nor send to the server in a network game.

See also

_command_proc_table

Enumerator
CMD_BUILD_RAILROAD_TRACK	build a rail track
CMD_REMOVE_RAILROAD_TRACK	remove a rail track
CMD_BUILD_SINGLE_RAIL	build a single rail track
CMD_REMOVE_SINGLE_RAIL	remove a single rail track
CMD_LANDSCAPE_CLEAR	demolish a tile
CMD_BUILD_BRIDGE	build a bridge
CMD_BUILD_RAIL_STATION	build a rail station
CMD_BUILD_TRAIN_DEPOT	build a train depot
CMD_BUILD_SINGLE_SIGNAL	build a signal
CMD_REMOVE_SINGLE_SIGNAL	remove a signal
CMD_TERRAFORM_LAND	terraform a tile
CMD_BUILD_OBJECT	build an object
CMD_BUILD_OBJECT_AREA	build an area of objects
CMD_BUILD_TUNNEL	build a tunnel
CMD_REMOVE_FROM_RAIL_STATION	remove a (rectangle of) tiles from a rail station
CMD_CONVERT_RAIL	convert a rail type
CMD_BUILD_RAIL_WAYPOINT	build a waypoint
CMD_RENAME_WAYPOINT	rename a waypoint
CMD_REMOVE_FROM_RAIL_WAYPOINT	remove a (rectangle of) tiles from a rail waypoint
CMD_BUILD_ROAD_WAYPOINT	build a road waypoint
CMD_REMOVE_FROM_ROAD_WAYPOINT	remove a (rectangle of) tiles from a road waypoint
CMD_BUILD_ROAD_STOP	build a road stop
CMD_REMOVE_ROAD_STOP	remove a road stop
CMD_BUILD_LONG_ROAD	build a complete road (not a "half" one)
CMD_REMOVE_LONG_ROAD	remove a complete road (not a "half" one)
CMD_BUILD_ROAD	build a "half" road
CMD_BUILD_ROAD_DEPOT	build a road depot
CMD_CONVERT_ROAD	convert a road type
CMD_BUILD_AIRPORT	build an airport
CMD_BUILD_DOCK	build a dock
CMD_BUILD_SHIP_DEPOT	build a ship depot
CMD_BUILD_BUOY	build a buoy
CMD_PLANT_TREE	plant a tree
CMD_BUILD_VEHICLE	build a vehicle
CMD_SELL_VEHICLE	sell a vehicle
CMD_REFIT_VEHICLE	refit the cargo space of a vehicle
CMD_SEND_VEHICLE_TO_DEPOT	send a vehicle to a depot
CMD_SET_VEHICLE_VISIBILITY	hide or unhide a vehicle in the build vehicle and autoreplace GUIs
CMD_MOVE_RAIL_VEHICLE	move a rail vehicle (in the depot)
CMD_FORCE_TRAIN_PROCEED	proceed a train to pass a red signal
CMD_REVERSE_TRAIN_DIRECTION	turn a train around
CMD_CLEAR_ORDER_BACKUP	clear the order backup of a given user/tile
CMD_MODIFY_ORDER	modify an order (like set full-load)
CMD_SKIP_TO_ORDER	skip an order to the next of specific one
CMD_DELETE_ORDER	delete an order
CMD_INSERT_ORDER	insert a new order
CMD_CHANGE_SERVICE_INT	change the server interval of a vehicle
CMD_BUILD_INDUSTRY	build a new industry
CMD_INDUSTRY_SET_FLAGS	change industry control flags
CMD_INDUSTRY_SET_EXCLUSIVITY	change industry exclusive consumer/supplier
CMD_INDUSTRY_SET_TEXT	change additional text for the industry
CMD_INDUSTRY_SET_PRODUCTION	change industry production
CMD_SET_COMPANY_MANAGER_FACE	set the manager's face of the company
CMD_SET_COMPANY_COLOUR	set the colour of the company
CMD_INCREASE_LOAN	increase the loan from the bank
CMD_DECREASE_LOAN	decrease the loan from the bank
CMD_SET_COMPANY_MAX_LOAN	sets the max loan for the company
CMD_WANT_ENGINE_PREVIEW	confirm the preview of an engine
CMD_ENGINE_CTRL	control availability of the engine for companies
CMD_RENAME_VEHICLE	rename a whole vehicle
CMD_RENAME_ENGINE	rename a engine (in the engine list)
CMD_RENAME_COMPANY	change the company name
CMD_RENAME_PRESIDENT	change the president name
CMD_RENAME_STATION	rename a station
CMD_RENAME_DEPOT	rename a depot
CMD_PLACE_SIGN	place a sign
CMD_RENAME_SIGN	rename a sign
CMD_TURN_ROADVEH	turn a road vehicle around
CMD_PAUSE	pause the game
CMD_BUY_COMPANY	buy a company which is bankrupt
CMD_FOUND_TOWN	found a town
CMD_RENAME_TOWN	rename a town
CMD_DO_TOWN_ACTION	do a action from the town detail window (like advertises or bribe)
CMD_TOWN_CARGO_GOAL	set the goal of a cargo for a town
CMD_TOWN_GROWTH_RATE	set the town growth rate
CMD_TOWN_RATING	set rating of a company in a town
CMD_TOWN_SET_TEXT	set the custom text of a town
CMD_EXPAND_TOWN	expand a town
CMD_DELETE_TOWN	delete a town
CMD_PLACE_HOUSE	place a house
CMD_ORDER_REFIT	change the refit information of an order (for "goto depot" )
CMD_CLONE_ORDER	clone (and share) an order
CMD_CLEAR_AREA	clear an area
CMD_MONEY_CHEAT	do the money cheat
CMD_CHANGE_BANK_BALANCE	change bank balance to charge costs or give money from a GS
CMD_BUILD_CANAL	build a canal
CMD_CREATE_SUBSIDY	create a new subsidy
CMD_COMPANY_CTRL	used in multiplayer to create a new companies etc.
CMD_COMPANY_ALLOW_LIST_CTRL	Used in multiplayer to add/remove a client's public key to/from the company's allow list.
CMD_CUSTOM_NEWS_ITEM	create a custom news message
CMD_CREATE_GOAL	create a new goal
CMD_REMOVE_GOAL	remove a goal
CMD_SET_GOAL_DESTINATION	update goal destination of a goal
CMD_SET_GOAL_TEXT	update goal text of a goal
CMD_SET_GOAL_PROGRESS	update goal progress text of a goal
CMD_SET_GOAL_COMPLETED	update goal completed status of a goal
CMD_GOAL_QUESTION	ask a goal related question
CMD_GOAL_QUESTION_ANSWER	answer(s) to CMD_GOAL_QUESTION
CMD_CREATE_STORY_PAGE	create a new story page
CMD_CREATE_STORY_PAGE_ELEMENT	create a new story page element
CMD_UPDATE_STORY_PAGE_ELEMENT	update a story page element
CMD_SET_STORY_PAGE_TITLE	update title of a story page
CMD_SET_STORY_PAGE_DATE	update date of a story page
CMD_SHOW_STORY_PAGE	show a story page
CMD_REMOVE_STORY_PAGE	remove a story page
CMD_REMOVE_STORY_PAGE_ELEMENT	remove a story page element
CMD_SCROLL_VIEWPORT	scroll main viewport of players
CMD_STORY_PAGE_BUTTON	selection via story page button
CMD_LEVEL_LAND	level land
CMD_BUILD_LOCK	build a lock
CMD_BUILD_SIGNAL_TRACK	add signals along a track (by dragging)
CMD_REMOVE_SIGNAL_TRACK	remove signals along a track (by dragging)
CMD_GIVE_MONEY	give money to another company
CMD_CHANGE_SETTING	change a setting
CMD_CHANGE_COMPANY_SETTING	change a company setting
CMD_SET_AUTOREPLACE	set an autoreplace entry
CMD_CLONE_VEHICLE	clone a vehicle
CMD_START_STOP_VEHICLE	start or stop a vehicle
CMD_MASS_START_STOP	start/stop all vehicles (in a depot)
CMD_AUTOREPLACE_VEHICLE	replace/renew a vehicle while it is in a depot
CMD_DEPOT_SELL_ALL_VEHICLES	sell all vehicles which are in a given depot
CMD_DEPOT_MASS_AUTOREPLACE	force the autoreplace to take action in a given depot
CMD_CREATE_GROUP	create a new group
CMD_DELETE_GROUP	delete a group
CMD_ALTER_GROUP	alter a group
CMD_ADD_VEHICLE_GROUP	add a vehicle to a group
CMD_ADD_SHARED_VEHICLE_GROUP	add all other shared vehicles to a group which are missing
CMD_REMOVE_ALL_VEHICLES_GROUP	remove all vehicles from a group
CMD_SET_GROUP_FLAG	set/clear a flag for a group
CMD_SET_GROUP_LIVERY	set the livery for a group
CMD_MOVE_ORDER	move an order
CMD_CHANGE_TIMETABLE	change the timetable for a vehicle
CMD_BULK_CHANGE_TIMETABLE	change the timetable for all orders of a vehicle
CMD_SET_VEHICLE_ON_TIME	set the vehicle on time feature (timetable)
CMD_AUTOFILL_TIMETABLE	autofill the timetable
CMD_SET_TIMETABLE_START	set the date that a timetable should start
CMD_OPEN_CLOSE_AIRPORT	open/close an airport to incoming aircraft
CMD_CREATE_LEAGUE_TABLE	create a new league table
CMD_CREATE_LEAGUE_TABLE_ELEMENT	create a new element in a league table
CMD_UPDATE_LEAGUE_TABLE_ELEMENT_DATA	update the data fields of a league table element
CMD_UPDATE_LEAGUE_TABLE_ELEMENT_SCORE	update the score of a league table element
CMD_REMOVE_LEAGUE_TABLE_ELEMENT	remove a league table element
CMD_END	Must ALWAYS be on the end of this list!! (period)

Definition at line 196 of file command_type.h.

CommandType

enum class CommandType : uint8_t

strong

Types of commands we have.

Enumerator
LandscapeConstruction	Construction and destruction of objects on the map.
VehicleConstruction	Construction, modification (incl. refit) and destruction of vehicles.
MoneyManagement	Management of money, i.e. loans.
VehicleManagement	Stopping, starting, sending to depot, turning around, replace orders etc.
RouteManagement	Modifications to route management (orders, groups, etc).
OtherManagement	Renaming stuff, changing company colours, placing signs, etc.
CompanySetting	Changing settings related to a company.
ServerSetting	Pausing/removing companies/server settings.
Cheat	A cheat of some sorts.
End	End marker.

Definition at line 420 of file command_type.h.

DoCommandFlag

enum class DoCommandFlag : uint8_t

strong

List of flags for a command.

This enums defines some flags which can be used for the commands.

Enumerator
Execute	execute the given command
Auto	don't allow building on structures
QueryCost	query cost only, don't build.
NoWater	don't allow building on water
NoTestTownRating	town rating does not disallow you from building
Bankrupt	company bankrupts, skip money check, skip vehicle on tile check in some cases
AutoReplace	autoreplace/autorenew is in progress, this shall disable vehicle limits when building, and ignore certain restrictions when undoing things (like vehicle attach callback)
NoCargoCapacityCheck	when autoreplace/autorenew is in progress, this shall prevent truncating the amount of cargo in the vehicle to prevent testing the command to remove cargo
AllTiles	allow this command also on MP_VOID tiles
NoModifyTownRating	do not change town rating
ForceClearTile	do not only remove the object on the tile, but also clear any water left on it

Definition at line 383 of file command_type.h.

Function Documentation

CommandCostWithParam() [1/2]

CommandCost CommandCostWithParam	(	StringID	str,
		ConvertibleThroughBase auto	value
	)

Definition at line 184 of file command_type.h.

CommandCostWithParam() [2/2]

CommandCost CommandCostWithParam	(	StringID	str,
		uint64_t	value
	)

Return an error status, with string and parameter.

Parameters

str	StringID of error.
value	Single parameter for error.

Returns

CommandCost representing the error.

Definition at line 417 of file command.cpp.

References GetEncodedString(), IsLocalCompany(), and CommandCost::SetEncodedMessage().

Referenced by CheckAllowRemoveRoad(), CheckforTownRating(), CheckIfAuthorityAllowsNewStation(), ClearTile_Station(), ClearTile_Town(), CmdBuildAirport(), CmdBuildBridge(), CmdDecreaseLoan(), CmdIncreaseLoan(), DoBuildLock(), CommandHelperBase::InternalExecuteProcessResult(), and IsStationBridgeAboveOk().