private static MemoryStream Decompress(BinaryReader reader, PackedFileHeader header)
{
var blockCount = header.DataBlocksCount;
var decompressedSize = header.DecompressedSize;
var isReforged = header.IsReforgedReplay;
var decompressedData = new MemoryStream();
for (var chunk = 0; chunk < blockCount; chunk++)
{
var compressedChunkSize = reader.ReadUInt16();
if (isReforged)
{
reader.BaseStream.Seek(2, SeekOrigin.Current);
}
var decompressedChunkSize = reader.ReadUInt16();
var checksum = reader.ReadUInt32();
if (isReforged)
{
reader.BaseStream.Seek(2, SeekOrigin.Current);
}
using var compressedDataStream = new MemoryStream();
reader.BaseStream.CopyTo(compressedDataStream, compressedChunkSize, StreamExtensions.DefaultBufferSize);
compressedDataStream.Position = 0;
var decompressedDataBytes = ZLibCompression.Decompress(compressedDataStream, decompressedChunkSize);
var decompressedDataLength = (chunk + 1 == blockCount) ? (int)(decompressedSize - decompressedData.Length) : decompressedChunkSize;
decompressedData.Write(decompressedDataBytes, 0, decompressedDataLength);
}
decompressedData.Position = 0;
return(decompressedData);
}
public void CompressAndDecompressTest()
{
String reference = "Hello World 0123456789";
byte[] dataToCompress = Encoding.Unicode.GetBytes(reference);
ZLibCompression zLibCompression = new ZLibCompression();
var compressed = zLibCompression.Compress(dataToCompress);
var decompressed = zLibCompression.Decompress(compressed);
Assert.Equal(reference, Encoding.Unicode.GetString(decompressed));
}
private Stream Decompress(BinaryReader reader)
{
var decompressedData = new MemoryStream();
for (var chunk = 0; chunk < _header.DataBlocksCount; chunk++)
{
var compressedChunkSize = reader.ReadUInt16();
var decompressedChunkSize = reader.ReadUInt16();
var checksum = reader.ReadUInt32();
using var compressedDataStream = new MemoryStream();
reader.BaseStream.CopyTo(compressedDataStream, compressedChunkSize, StreamExtensions.DefaultBufferSize);
compressedDataStream.Position = 0;
var decompressedDataBytes = ZLibCompression.Decompress(compressedDataStream, decompressedChunkSize);
decompressedData.Write(decompressedDataBytes, 0, decompressedDataBytes.Length);
}
return(decompressedData);
}
