/// <summary>
/// Obtains a stream which can be used to read and write a cache file's meta in realtime.
/// The stream will be set up such that offsets in the stream correspond to meta pointers in the cache file.
/// </summary>
/// <param name="cacheFile">The cache file to get a stream for.</param>
/// <returns>The stream if it was opened successfully, or null otherwise.</returns>
public override IStream GetMetaStream(ICacheFile cacheFile)
{
if (!CheckBuildInfo())
{
return(null);
}
Process gameProcess = FindGameProcess();
if (gameProcess == null)
{
return(null);
}
PokingInformation info = RetrieveInformation(gameProcess);
if (!info.HeaderAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a HeaderAddress value.");
}
if (!info.MagicAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a MagicAddress value.");
}
if (!info.SharedMagicAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a SharedMagicAddress value.");
}
var gameMemory = new ProcessModuleMemoryStream(gameProcess, _buildInfo.GameModule);
var mapInfo = new SecondGenMapPointerReader(gameMemory, _buildInfo, info);
long metaAddress;
if (cacheFile.Type != CacheFileType.Shared)
{
metaAddress = mapInfo.CurrentCacheAddress;
// The map isn't shared, so make sure the map names match
if (mapInfo.MapName != cacheFile.InternalName)
{
gameMemory.Close();
return(null);
}
}
else
{
metaAddress = mapInfo.SharedCacheAddress;
// Make sure the shared and current map pointers are different,
// or that the current map is the shared map
if (mapInfo.MapType != CacheFileType.Shared && mapInfo.CurrentCacheAddress == mapInfo.SharedCacheAddress)
{
gameMemory.Close();
return(null);
}
}
var metaStream = new OffsetStream(gameMemory, metaAddress - cacheFile.MetaArea.BasePointer);
return(new EndianStream(metaStream, BitConverter.IsLittleEndian ? Endian.LittleEndian : Endian.BigEndian));
}
/// <summary>
/// Obtains a stream which can be used to read and write a cache file's meta in realtime.
/// The stream will be set up such that offsets in the stream correspond to meta pointers in the cache file.
/// </summary>
/// <param name="cacheFile">The cache file to get a stream for.</param>
/// <returns>The stream if it was opened successfully, or null otherwise.</returns>
public IStream GetMetaStream(ICacheFile cacheFile)
{
if (string.IsNullOrEmpty(_buildInfo.GameExecutable))
{
throw new InvalidOperationException("No gameExecutable value found in Engines.xml for engine " + _buildInfo.Name + ".");
}
if (_buildInfo.Poking == null)
{
throw new InvalidOperationException("No poking definitions found in Engines.xml for engine " + _buildInfo.Name + ".");
}
Process gameProcess = FindGameProcess();
if (gameProcess == null)
{
return(null);
}
string version = gameProcess.MainModule.FileVersionInfo.FileVersion;
PokingInformation info = _buildInfo.Poking.RetrieveInformation(version);
if (info == null)
{
throw new InvalidOperationException("Game version " + version + " does not have poking information defined in the Formats folder.");
}
if (!info.HeaderAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a HeaderAddress value.");
}
if (!info.MagicAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a MagicAddress value.");
}
if (!info.SharedMagicAddress.HasValue)
{
throw new NotImplementedException("Second Generation poking requires a SharedMagicAddress value.");
}
var gameMemory = new ProcessMemoryStream(gameProcess);
var mapInfo = new SecondGenMapPointerReader(gameMemory, _buildInfo, info);
long metaAddress;
if (cacheFile.Type != CacheFileType.Shared)
{
metaAddress = mapInfo.CurrentCacheAddress;
// The map isn't shared, so make sure the map names match
if (mapInfo.MapName != cacheFile.InternalName)
{
gameMemory.Close();
return(null);
}
}
else
{
metaAddress = mapInfo.SharedCacheAddress;
// Make sure the shared and current map pointers are different,
// or that the current map is the shared map
if (mapInfo.MapType != CacheFileType.Shared && mapInfo.CurrentCacheAddress == mapInfo.SharedCacheAddress)
{
gameMemory.Close();
return(null);
}
}
var metaStream = new OffsetStream(gameMemory, metaAddress - cacheFile.MetaArea.BasePointer);
return(new EndianStream(metaStream, BitConverter.IsLittleEndian ? Endian.LittleEndian : Endian.BigEndian));
}