rubidium@6872: /* $Id$ */
rubidium@6872: 
rubidium@6872: /** @file command_func.h Functions related to commands. */
rubidium@6872: 
rubidium@6872: #ifndef COMMAND_FUNC_H
rubidium@6872: #define COMMAND_FUNC_H
rubidium@6872: 
rubidium@6872: #include "command_type.h"
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Checks if a command failes.
rubidium@6872:  *
rubidium@6872:  * As you see the parameter is not a command but the return value of a command,
rubidium@6872:  * the CommandCost class. This function checks if the command executed by
rubidium@6872:  * the CommandProc function failed and returns true if it does.
rubidium@6872:  *
rubidium@6872:  * @param cost The return value of a CommandProc call
rubidium@6872:  * @return true if the command failes
rubidium@6872:  * @see CmdSucceded
rubidium@6872:  */
rubidium@6872: static inline bool CmdFailed(CommandCost cost) { return cost.Failed(); }
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Checks if a command succeeded.
rubidium@6872:  *
rubidium@6872:  * As #CmdFailed this function checks if a command succeeded
rubidium@6872:  *
rubidium@6872:  * @param cost The return value of a CommandProc call
rubidium@6872:  * @return true if the command succeeded
rubidium@6872:  * @see CmdSucceeded
rubidium@6872:  */
rubidium@6872: static inline bool CmdSucceeded(CommandCost cost) { return cost.Succeeded(); }
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Define a default return value for a failed command.
rubidium@6872:  *
rubidium@6872:  * This variable contains a CommandCost object with is declared as "failed".
rubidium@6872:  * Other functions just need to return this error if there is an error,
rubidium@6872:  * which doesn't need to specific by a StringID.
rubidium@6872:  */
rubidium@6872: static const CommandCost CMD_ERROR = CommandCost(INVALID_STRING_ID);
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Returns from a function with a specific StringID as error.
rubidium@6872:  *
rubidium@6872:  * This macro is used to return from a function. The parameter contains the
rubidium@6872:  * StringID which will be returned.
rubidium@6872:  *
rubidium@6872:  * @param errcode The StringID to return
rubidium@6872:  */
rubidium@6872: #define return_cmd_error(errcode) return CommandCost(errcode);
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Execute a command
rubidium@6872:  */
rubidium@6872: CommandCost DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint32 procc);
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Execute a network safe DoCommand function
rubidium@6872:  */
rubidium@6872: bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, CommandCallback *callback, uint32 cmd, bool my_cmd = true);
rubidium@6872: 
rubidium@6872: #ifdef ENABLE_NETWORK
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Send a command over the network
rubidium@6872:  */
rubidium@6872: void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback);
rubidium@6872: #endif /* ENABLE_NETWORK */
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Text, which gets sent with a command
rubidium@6872:  *
rubidium@6872:  * This variable contains a string (be specific a pointer of the first
rubidium@6872:  * char of this string) which will be send with a command. This is
rubidium@6872:  * used for user input data like names or chat messages.
rubidium@6872:  */
rubidium@6872: extern const char *_cmd_text;
rubidium@6872: extern Money _additional_cash_required;
rubidium@6872: extern StringID _error_message;
rubidium@6872: 
rubidium@6872: /**
rubidium@6872:  * Checks if a integer value belongs to a command.
rubidium@6872:  */
rubidium@6872: bool IsValidCommand(uint32 cmd);
rubidium@6872: /**
rubidium@6872:  * Returns the flags from a given command.
rubidium@6872:  */
rubidium@6872: byte GetCommandFlags(uint32 cmd);
rubidium@6872: /**
rubidium@6872:  * Returns the current money available which can be used for a command.
rubidium@6872:  */
rubidium@6872: Money GetAvailableMoneyForCommand();
rubidium@6872: 
rubidium@6872: #endif /* COMMAND_FUNC_H */