/// <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(ExecutableName))
{
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;
long pointer = _buildInfo.Poking.RetrievePointer(version);
if (pointer == -1)
{
throw new InvalidOperationException("Game version " + version + " does not have a pointer defined in the Formats folder.");
}
var gameMemory = new ProcessMemoryStream(gameProcess);
var mapInfo = new H2VistaMapPointerReader(gameMemory, pointer);
long metaAddress;
if (cacheFile.Type != CacheFileType.Shared)
{
metaAddress = mapInfo.CurrentMetaAddress;
// The map isn't shared, so make sure the map names match
if (mapInfo.MapName != cacheFile.InternalName)
{
gameMemory.Close();
return(null);
}
}
else
{
metaAddress = mapInfo.SharedMetaAddress;
// 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.CurrentMetaAddress == mapInfo.SharedMetaAddress)
{
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)
{
Process gameProcess = FindGameProcess();
if (gameProcess == null)
{
return(null);
}
var gameMemory = new ProcessMemoryStream(gameProcess);
var mapInfo = new H2VistaMapPointerReader(gameMemory);
long metaAddress;
if (cacheFile.Type != CacheFileType.Shared)
{
metaAddress = mapInfo.CurrentMetaAddress;
// The map isn't shared, so make sure the map names match
if (mapInfo.MapName != cacheFile.InternalName)
{
gameMemory.Close();
return(null);
}
}
else
{
metaAddress = mapInfo.SharedMetaAddress;
// 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.CurrentMetaAddress == mapInfo.SharedMetaAddress)
{
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>
/// <param name="tag">The tag to get a stream for.</param>
/// <returns>The stream if it was opened successfully, or null otherwise.</returns>
public IStream GetMetaStream(ICacheFile cacheFile, ITag tag)
{
Process gameProcess = FindGameProcess();
if (gameProcess == null)
return null;
var gameMemory = new ProcessMemoryStream(gameProcess);
var mapInfo = new H2VistaMapPointerReader(gameMemory);
long metaAddress;
if (cacheFile.Type != CacheFileType.Shared)
{
metaAddress = mapInfo.CurrentMetaAddress;
// The map isn't shared, so make sure the map names match
if (mapInfo.MapName != cacheFile.InternalName)
{
gameMemory.Close();
return null;
}
}
else
{
metaAddress = mapInfo.SharedMetaAddress;
// 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.CurrentMetaAddress == mapInfo.SharedMetaAddress)
{
gameMemory.Close();
return null;
}
}
var metaStream = new OffsetStream(gameMemory, metaAddress - cacheFile.MetaArea.BasePointer);
return new EndianStream(metaStream, BitConverter.IsLittleEndian ? Endian.LittleEndian : Endian.BigEndian);
}
