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Location: cpp/openttd-patchpack/source/src/command_func.h
r10911:571c959dc9ed
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(svn r15246) -Fix [FS#2577]: close all windows *before* starting a new game/loading a game instead of doing that as one of the latest steps of loading the game. This caused, in some cases, the NewGRF settings to be reset when the game was already loaded resulting in instant desyncs when joining a network game
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/** @file command_func.h Functions related to commands. */
#ifndef COMMAND_FUNC_H
#define COMMAND_FUNC_H
#include "command_type.h"
/**
* Checks if a command failes.
*
* As you see the parameter is not a command but the return value of a command,
* the CommandCost class. This function checks if the command executed by
* the CommandProc function failed and returns true if it does.
*
* @param cost The return value of a CommandProc call
* @return true if the command failes
* @see CmdSucceded
*/
static inline bool CmdFailed(CommandCost cost) { return cost.Failed(); }
/**
* Checks if a command succeeded.
*
* As #CmdFailed this function checks if a command succeeded
*
* @param cost The return value of a CommandProc call
* @return true if the command succeeded
* @see CmdSucceeded
*/
static inline bool CmdSucceeded(CommandCost cost) { return cost.Succeeded(); }
/**
* Define a default return value for a failed command.
*
* This variable contains a CommandCost object with is declared as "failed".
* Other functions just need to return this error if there is an error,
* which doesn't need to specific by a StringID.
*/
static const CommandCost CMD_ERROR = CommandCost(INVALID_STRING_ID);
/**
* Returns from a function with a specific StringID as error.
*
* This macro is used to return from a function. The parameter contains the
* StringID which will be returned.
*
* @param errcode The StringID to return
*/
#define return_cmd_error(errcode) return CommandCost(errcode);
/**
* Execute a command
*/
CommandCost DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint32 cmd, const char *text = NULL);
CommandCost DoCommand(const CommandContainer *container, uint32 flags);
/**
* Execute a network safe DoCommand function
*/
bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback = NULL, const char *text = NULL, bool my_cmd = true);
bool DoCommandP(const CommandContainer *container, bool my_cmd = true);
#ifdef ENABLE_NETWORK
/**
* Send a command over the network
*/
void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback, const char *text);
#endif /* ENABLE_NETWORK */
extern Money _additional_cash_required;
extern StringID _error_message;
/**
* Checks if a integer value belongs to a command.
*/
bool IsValidCommand(uint32 cmd);
/**
* Returns the flags from a given command.
*/
byte GetCommandFlags(uint32 cmd);
/**
* Returns the current money available which can be used for a command.
*/
Money GetAvailableMoneyForCommand();
/**
* Extracts the DC flags needed for DoCommand from the flags returned by GetCommandFlags
* @param cmd_flags Flags from GetCommandFlags
* @return flags for DoCommand
*/
static inline uint32 CommandFlagsToDCFlags(uint cmd_flags)
{
uint32 flags = 0;
if (cmd_flags & CMD_NO_WATER) flags |= DC_NO_WATER;
if (cmd_flags & CMD_AUTO) flags |= DC_AUTO;
if (cmd_flags & CMD_ALL_TILES) flags |= DC_ALL_TILES;
return flags;
}
#endif /* COMMAND_FUNC_H */
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