public static byte[] Decompress(byte[] inBytes, string outPath = "", SevenZip.ICodeProgress progress = null)
{
byte[] nbytes = null;
Stream inStream = new MemoryStream(inBytes);
Stream outStream = null;
if (string.IsNullOrEmpty(outPath))
{
outStream = new MemoryStream();
}
else
{
outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
}
BinaryReader sr = new BinaryReader(inStream);
if (inStream != null && outStream != null)
{
byte[] properties = new byte[5];
if (sr.Read(properties, 0, 5) != 5)
{
throw (new Exception("input .lzma is too short"));
}
//inStream.Seek(5, SeekOrigin.Begin);
SevenZip.Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder();
decoder.SetDecoderProperties(properties);
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = inStream.ReadByte();
if (v < 0)
{
throw (new Exception("Can't Read 1"));
}
outSize |= ((long)(byte)v) << (8 * i);
}
long compressedSize = inStream.Length - inStream.Position;
mLength = compressedSize;
decoder.Code(inStream, outStream, compressedSize, outSize, progress);
sr.Close();
inStream.Close();
outStream.Position = 0;//Seek(0, SeekOrigin.Begin);
sr = new BinaryReader(outStream);
nbytes = sr.ReadBytes((int)outStream.Length);
sr.Close();
outStream.Close();
}
return(nbytes);
}
/// <summary>
/// 同步压缩
/// </summary>
/// <param name="inFile"></param>
/// <param name="outFile"></param>
/// <param name="progress"></param>
public static void Compress(string inFile, string outFile, SevenZip.ICodeProgress progress = null)
{
SevenZip.Compression.LZMA.Encoder coder = new SevenZip.Compression.LZMA.Encoder();
using (var input = File.OpenRead(inFile))
{
using (var output = File.Create(outFile))
{
coder.WriteCoderProperties(output);
output.Write(System.BitConverter.GetBytes(input.Length), 0, 8);
coder.Code(input, output, input.Length, -1, progress);
}
}
}
public static byte[] Compress(byte[] inBytes, string outPath = "", SevenZip.ICodeProgress progress = null)
{
byte[] nbytes = null;
Stream inStream = new MemoryStream(inBytes);
Stream outStream = null;
if (string.IsNullOrEmpty(outPath))
{
outStream = new MemoryStream();
}
else
{
outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
}
if (inStream != null && outStream != null)
{
SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize;
if (eos || stdInMode)
{
fileSize = -1;
}
else
{
fileSize = inStream.Length;
}
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
mLength = inStream.Length;
encoder.Code(inStream, outStream, -1, -1, progress);
inStream.Close();
outStream.Position = 0;//Seek(0, SeekOrigin.Begin);
BinaryReader sr = new BinaryReader(outStream);
nbytes = sr.ReadBytes((int)outStream.Length);
sr.Close();
outStream.Close();
}
return(nbytes);
}
public static void Decompress(string inFile, string outFile, SevenZip.ICodeProgress progress = null)
{
SevenZip.Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder();
using (var input = File.Create(inFile))
{
using (var output = File.Create(outFile))
{
int propertiesSize = SevenZip.Compression.LZMA.Encoder.kPropSize;
byte[] properties = new byte[propertiesSize];
input.Read(properties, 0, propertiesSize);
byte[] fileLengthBytes = new byte[8];
input.Read(fileLengthBytes, 0, 8);
long fileLength = System.BitConverter.ToInt64(fileLengthBytes, 0);
decoder.SetDecoderProperties(properties);
decoder.Code(input, output, input.Length, fileLength, progress);
}
}
}
public static void Decompress(byte[] inFileByteArray, string outFile, SevenZip.ICodeProgress progress = null, System.Action codeComplete = null)
{
SevenZip.Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder();
using (var input = new MemoryStream(inFileByteArray))
{
using (var output = File.Create(outFile))
{
byte[] properties = new byte[5];
input.Read(properties, 0, 5);
byte[] fileLengthBytes = new byte[8];
input.Read(fileLengthBytes, 0, 8);
long fileLength = System.BitConverter.ToInt64(fileLengthBytes, 0);
decoder.SetDecoderProperties(properties);
decoder.Code(input, output, input.Length, fileLength, progress);
}
}
if (codeComplete != null)
{
codeComplete();
}
}
