public UserGet Decompress(byte[] inFile)
{
using (var input = new MemoryStream(inFile))
using (var output = new MemoryStream())
{
var decoder = new SevenZip.SDK.Compress.LZMA.Decoder();
byte[] properties = new byte[5];
if (input.Read(properties, 0, 5) != 5)
{
throw (new Exception("input .lzma is too short"));
}
decoder.SetDecoderProperties(properties);
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = input.ReadByte();
if (v < 0)
{
throw (new Exception("Can't Read 1"));
}
outSize |= ((long)(byte)v) << (8 * i);
}
long compressedSize = input.Length - input.Position;
decoder.Code(input, output, compressedSize, outSize, null);
output.Position = 0;
return(Serializer.Deserialize <UserGet>(output));
}
}
// This is the decompression function
private static void Decompress(string[] args)
{
// We call the 7zip decoder
SevenZip.SDK.Compress.LZMA.Decoder decoder = new SevenZip.SDK.Compress.LZMA.Decoder();
// We get an array of file list ( All files in args[0] folder, where args[2] is the filter
string[] filePaths = Directory.GetFiles(args[0], args[2]);
// Directory exist or not, we create the folder
Directory.CreateDirectory(args[1]);
// For each files in the specified folder, we decode it
foreach (string filePath in filePaths)
{
// We get the file properties ( Size, date, owner, etc.. )
FileInfo f = new FileInfo(filePath);
// We work on the input file
using (FileStream input = new FileStream(filePath, FileMode.Open))
{
// We work on the output file
using (FileStream output = new FileStream(Path.Combine(args[1], Path.GetFileName(filePath)), FileMode.Create))
{
// Read the decoder properties
byte[] properties = new byte[5];
// Take the 5 bytes after offset 0
input.Read(properties, 0, 5);
// Read in the decompress file size.
byte[] fileLengthBytes = new byte[4];
// Take 4 bytes after offset 0
input.Read(fileLengthBytes, 0, 4);
// Convert to Int32
int fileLength = BitConverter.ToInt32(fileLengthBytes, 0);
// Set the decoder parameters
decoder.SetDecoderProperties(properties);
// Write the decompressed file in output directory
decoder.Code(input, output, input.Length, fileLength, null);
// Free
output.Flush();
// Free
output.Close();
}
// Free
input.Close();
}
}
}
