111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file command_func.h Functions related to commands. */
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#ifndef COMMAND_FUNC_H
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#define COMMAND_FUNC_H
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#include "command_type.h"
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/**
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* Checks if a command failes.
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*
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* As you see the parameter is not a command but the return value of a command,
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* the CommandCost class. This function checks if the command executed by
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* the CommandProc function failed and returns true if it does.
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*
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* @param cost The return value of a CommandProc call
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* @return true if the command failes
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* @see CmdSucceded
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*/
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static inline bool CmdFailed(CommandCost cost) { return cost.Failed(); }
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/**
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* Checks if a command succeeded.
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*
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* As #CmdFailed this function checks if a command succeeded
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*
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* @param cost The return value of a CommandProc call
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* @return true if the command succeeded
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* @see CmdSucceeded
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*/
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static inline bool CmdSucceeded(CommandCost cost) { return cost.Succeeded(); }
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/**
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* Define a default return value for a failed command.
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*
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* This variable contains a CommandCost object with is declared as "failed".
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* Other functions just need to return this error if there is an error,
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* which doesn't need to specific by a StringID.
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*/
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static const CommandCost CMD_ERROR = CommandCost(INVALID_STRING_ID);
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/**
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* Returns from a function with a specific StringID as error.
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*
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* This macro is used to return from a function. The parameter contains the
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* StringID which will be returned.
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*
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* @param errcode The StringID to return
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*/
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#define return_cmd_error(errcode) return CommandCost(errcode);
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/**
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* Execute a command
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*/
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CommandCost DoCommand(TileIndex tile, uint32 p1, uint32 p2, DoCommandFlag flags, uint32 cmd, const char *text = NULL);
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CommandCost DoCommand(const CommandContainer *container, DoCommandFlag flags);
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/**
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* Execute a network safe DoCommand function
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*/
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bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback = NULL, const char *text = NULL, bool my_cmd = true);
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bool DoCommandP(const CommandContainer *container, bool my_cmd = true);
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#ifdef ENABLE_NETWORK
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/**
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* Send a command over the network
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*/
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void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback, const char *text);
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#endif /* ENABLE_NETWORK */
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extern Money _additional_cash_required;
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extern StringID _error_message;
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/**
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* Checks if a integer value belongs to a command.
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*/
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bool IsValidCommand(uint32 cmd);
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/**
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* Returns the flags from a given command.
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*/
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byte GetCommandFlags(uint32 cmd);
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/**
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* Returns the current money available which can be used for a command.
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*/
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Money GetAvailableMoneyForCommand();
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/**
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* Extracts the DC flags needed for DoCommand from the flags returned by GetCommandFlags
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* @param cmd_flags Flags from GetCommandFlags
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* @return flags for DoCommand
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*/
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static inline DoCommandFlag CommandFlagsToDCFlags(uint cmd_flags)
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{
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DoCommandFlag flags = DC_NONE;
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if (cmd_flags & CMD_NO_WATER) flags |= DC_NO_WATER;
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if (cmd_flags & CMD_AUTO) flags |= DC_AUTO;
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if (cmd_flags & CMD_ALL_TILES) flags |= DC_ALL_TILES;
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return flags;
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}
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#endif /* COMMAND_FUNC_H */
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