/// <summary>
/// Unpacks this file<paramref name="source"/>.
/// </summary>
/// <param name="source">Binary file (.uop source).</param>
/// <returns>Binary data from this file.</returns>
public byte[] Unpack(BinaryReader source)
{
source.BaseStream.Seek(m_DataBlockAddress + m_DataBlockLength, SeekOrigin.Begin);
byte[] sourceData = new byte[m_CompressedSize];
if (source.Read(sourceData, 0, m_CompressedSize) != m_CompressedSize)
{
throw new StreamSourceException();
}
switch (m_Compression)
{
case CompressionFlag.Zlib:
{
byte[] destData = new byte[m_DecompressedSize];
int destLength = m_DecompressedSize;
ZLibError error = Zlib.Decompress(destData, ref destLength, sourceData, m_CompressedSize);
if (error != ZLibError.Okay)
{
throw new CompressionException(error);
}
return(destData);
}
case CompressionFlag.None:
{
return(sourceData);
}
}
return(null);
}
/// <summary>
/// Updates <see cref="Mythic.Package.MythicPackageFile.DataBlockAddress"/> within .uop file,
/// <see cref="Mythic.Package.MythicPackageFile.CompressedSize"/> and <see cref="Mythic.Package.MythicPackageFile.DecompressedSize"/>.
/// </summary>
/// <param name="pointer">Address of <see cref="Mythic.Package.MythicPackageFile.DataBlockAddress"/>.</param>
public void UpdateOffsets(ref long pointer)
{
m_DataBlockAddress = pointer;
m_DataBlockLength = 0; // Custom .uop files don't need data header.
if (m_Added || m_Modified)
{
if (!File.Exists(m_SourceFileName))
{
throw new FileNotFoundException();
}
FileInfo info = new FileInfo(m_SourceFileName);
m_CompressedSize = (int)info.Length;
m_DecompressedSize = (int)info.Length;
byte[] sourceBuffer;
using (BinaryReader reader = new BinaryReader(info.OpenRead()))
{
sourceBuffer = reader.ReadBytes(m_DecompressedSize);
}
if (sourceBuffer.Length < 4)
{
m_Compression = CompressionFlag.None;
}
switch (m_Compression)
{
case CompressionFlag.Zlib:
{
m_SourceBuffer = new byte[m_CompressedSize];
ZLibError error = Zlib.Compress(m_SourceBuffer, ref m_CompressedSize, sourceBuffer, m_DecompressedSize, ZLibQuality.Speed);
if (error != ZLibError.Okay)
{
throw new CompressionException(error);
}
break;
}
case CompressionFlag.None:
{
m_SourceBuffer = sourceBuffer;
break;
}
}
}
else
{
m_SourceBuffer = null;
}
pointer += m_DataBlockLength + m_CompressedSize;
}