public static void Decompress(string bz2File, string localFile, string type)
{
using (var fs = new FileStream(bz2File, FileMode.Open, FileAccess.Read))
using (var fsOut = File.Create(localFile))
{
if (type == "bzip2")
{
BZip2Decompressor.Decompress(fs, fsOut, true);
}
else if (type == "gzip")
{
using (var GZipDecompressor = new GZipStream(fs, CompressionMode.Decompress))
{
GZipDecompressor.CopyTo(fsOut);
}
}
}
}
private void decompress(byte[] data)
{
DataInputStream stream = new DataInputStream(data);
if (_keys != null && _keys.Length != 0)
{
stream.decodeXTEA(_keys);
}
int compression = stream.readUnsignedByte();
_compression = (CompressionType)(compression > 2 ? 2 : compression);
int compressedLength = stream.readInt();
if (compressedLength < 0 || compressedLength > 1000000)
{
throw new InvalidOperationException("INVALID ARCHIVE HEADER");
}
int length;
switch (_compression)
{
case CompressionType.RAW:
_data = new byte[compressedLength];
checkRevision(stream, compressedLength);
stream.Read(_data, 0, compressedLength);
break;
case CompressionType.BZIP:
length = stream.readInt();
if (length <= 0)
{
_data = null;
}
else
{
_data = new byte[length];
checkRevision(stream, compressedLength);
BZip2Decompressor.Decompress(_data, data);
}
break;
default: // GZIP
length = stream.readInt();
if (length <= 0 || length > 1000000000)
{
_data = null;
}
else
{
_data = new byte[length];
checkRevision(stream, compressedLength);
GZipDecompressor.Decompress(_data, stream);
}
break;
}
}
