MTA:Eir/FileSystem/file/readBoolean
Jump to navigation
Jump to search
This function attempts to read a boolean (native type) from a file and return it. The amount of bytes read should be one.
Syntax
boolean file:readBoolean ()
Returns
Returns a boolean if it was successfully read from the file, nil otherwise.
Example
Click to collapse [-]
ClientThis snippet demonstrates a variable file format that stores player properties depending on whether they are required.
local function saveLocalPlayerState( theFile, saveDetails )
local player = localPlayer;
-- Write basic details about the player instance.
theFile:writeShort( getElementModel( player ) );
theFile:writeInt( getPlayerMoney() );
-- Next write down special details given by the game.
local isQuickSave = saveDetails.isQuickSave and true or false;
theFile:writeBoolean( isQuickSave );
if not ( isQuickSave ) then
-- Save things like player position, dimension and interior.
local posX, posY, posZ = getElementPosition( player );
local dimension, interior = getElementDimension( player ), getElementInterior( player );
theFile:writeDouble( posX ); theFile:writeDouble( posY ); theFile:writeDouble( posZ );
theFile:writeShort( dimension ); theFile:writeShort( interior );
end
-- Save the time this snapshot was taken.
local realTime = getRealTime();
theFile:writeShort( realTime.minute ); theFile:writeShort( realTime.hour );
theFile:writeShort( realTime.monthday ); theFile:writeShort( realTime.month + 1 ); theFile:writeShort( realTime.year + 1900 );
return true;
end
local function readBasicData( obj, operator, callback )
local data = operator(obj);
if ( data ) then
callback( data );
end
end
-- Function to restore details from a snapshot file stream.
local function loadLocalPlayerState( theFile )
local player = localPlayer;
local saveDetails = {};
-- Restore the basic information.
readBasicData( theFile, theFile.readShort, function(model) setElementModel( player, model ); end );
readBasicData( theFile, theFile.readInt, function(money) setPlayerMoney(money); end );
-- Read advanced parameters,
local isQuickSave = theFile:readBoolean();
saveDetails.isQuickSave = isQuickSave;
if not ( isQuickSave ) then
-- Restore advanced details.
local posX, posY, posZ = theFile:readDouble(), theFile:readDouble(), theFile:readDouble();
local dimension, interior = theFile:readShort(), theFile:readShort();
-- Set them, if read correctly.
if ( interior ) then
setElementPosition( player, posX, posY, posZ );
setElementDimension( player, dimension );
setElementInterior( player, interior );
end
end
-- Get the time the snapshot was taken at.
saveDetails.saveTime = {
minute = theFile:readShort(),
hour = theFile:readShort(),
monthday = theFile:readShort(),
month = theFile:readShort(),
year = theFile:readShort()
};
-- Return the save details so the runtime can react accordingly.
return saveDetails;
end
-- Command to save a complete snapshot of the player.
addCommandHandler( "save",
function()
local saveDetails =
{
isQuickSave = false
};
local saveFile = fileCreate( "savestate.dat" );
if ( saveFile ) then
saveLocalPlayerState( saveFile, saveDetails );
saveFile:'''Bold text'''destroy();
outputChatBox( "successfully saved complete player status" );
end
end
);
-- Command to save a quick savestate.
addCommandHandler( "qsave",
function()
local saveDetails =
{
isQuickSave = true
};
local saveFile = fileCreate( "savestate.dat" );
if ( saveFile ) then
saveLocalPlayerState( saveFile, saveDetails );
saveFile:destroy();
outputChatBox( "successfully saved quick player status" );
end
end
);
-- Command to load a savestate from disk.
addCommandHandler( "loadstate",
function()
if not ( fileExists( "savestate.dat" ) ) then
return;
end
local saveFile = fileOpen( "savestate.dat" );
if ( saveFile ) then
local saveData = loadLocalPlayerState( saveFile );
saveFile:destroy();
outputChatBox( "restored from a save (date was " .. saveData.saveTime.monthday .. "." .. saveData.saveTime.month .. "." .. saveData.saveTime.year .. ")" );
end
end
);