/// <summary>
/// 압축된 데이타를 복원한다.
/// </summary>
/// <param name="input">복원할 Data</param>
/// <returns>복원된 Data</returns>
public override byte[] Decompress(byte[] input)
{
if (IsDebugEnabled)
{
log.Debug(CompressorTool.SR.DecompressStartMsg);
}
// check input data
if (input.IsZeroLength())
{
if (log.IsWarnEnabled)
{
log.Warn(CompressorTool.SR.InvalidInputDataMsg);
}
return(new byte[0]);
}
byte[] properties2 = new byte[5];
byte[] output;
using (var outStream = new MemoryStream())
using (var inStream = new MemoryStream(input)) {
var decoder = new NSoft.NFramework.Compressions.SevenZip.Compression.LZMA.LzmaDecoder();
inStream.Seek(0, SeekOrigin.Begin);
if (inStream.Read(properties2, 0, 5) != 5)
{
throw new InvalidOperationException("input 7Zip.LZMA is too short.");
}
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = inStream.ReadByte();
if (v < 0)
{
throw new InvalidOperationException("Can't Read 1");
}
outSize |= ((long)(byte)v) << (8 * i);
}
decoder.SetDecoderProperties(properties2);
long compressedSize = inStream.Length - inStream.Position;
decoder.Code(inStream, outStream, compressedSize, outSize, null);
output = outStream.ToArray();
}
if (IsDebugEnabled)
{
log.Debug(CompressorTool.SR.DecompressResultMsg, input.Length, output.Length, output.Length / (double)input.Length);
}
return(output ?? new byte[0]);
}
/// <summary>
/// 압축된 데이타를 복원한다.
/// </summary>
/// <param name="input">복원할 Data</param>
/// <returns>복원된 Data</returns>
public override byte[] Decompress(byte[] input) {
if(IsDebugEnabled)
log.Debug(CompressorTool.SR.DecompressStartMsg);
// check input data
if(input.IsZeroLength()) {
if(log.IsWarnEnabled)
log.Warn(CompressorTool.SR.InvalidInputDataMsg);
return new byte[0];
}
byte[] properties2 = new byte[5];
byte[] output;
using(var outStream = new MemoryStream())
using(var inStream = new MemoryStream(input)) {
var decoder = new NSoft.NFramework.Compressions.SevenZip.Compression.LZMA.LzmaDecoder();
inStream.Seek(0, SeekOrigin.Begin);
if(inStream.Read(properties2, 0, 5) != 5)
throw new InvalidOperationException("input 7Zip.LZMA is too short.");
long outSize = 0;
for(int i = 0; i < 8; i++) {
int v = inStream.ReadByte();
if(v < 0)
throw new InvalidOperationException("Can't Read 1");
outSize |= ((long)(byte)v) << (8 * i);
}
decoder.SetDecoderProperties(properties2);
long compressedSize = inStream.Length - inStream.Position;
decoder.Code(inStream, outStream, compressedSize, outSize, null);
output = outStream.ToArray();
}
if(IsDebugEnabled)
log.Debug(CompressorTool.SR.DecompressResultMsg, input.Length, output.Length, output.Length / (double)input.Length);
return output ?? new byte[0];
}
