/// <summary>
/// decompress CLAIMS_SET
/// </summary>
/// <param name="option"></param>
/// <param name="compressedData"></param>
/// <param name="decompressedSize"></param>
/// <returns>Decompressed data</returns>
public static byte[] Decompress(CLAIMS_COMPRESSION_FORMAT option, byte[] compressedData, int decompressedSize)
{
XcaDecompressor decompressor;
switch (option)
{
case CLAIMS_COMPRESSION_FORMAT.COMPRESSION_FORMAT_LZNT1:
decompressor = new LZNT1Decompressor();
break;
case CLAIMS_COMPRESSION_FORMAT.COMPRESSION_FORMAT_XPRESS:
decompressor = new PlainLZ77Decompressor();
break;
case CLAIMS_COMPRESSION_FORMAT.COMPRESSION_FORMAT_XPRESS_HUFF:
decompressor = new LZ77HuffmanDecompressor();
break;
default:
throw new NotSupportedException($"{option} is not supported.");
}
byte[] ret = decompressor.Decompress(compressedData);
if (ret.Length != decompressedSize)
{
throw new Exception($"Size of decompressed data ({ret.Length}) is different from decompressedSize ({decompressedSize}).");
}
return(ret);
}
/// <summary>
/// decompress CLAIMS_SET
/// </summary>
/// <param name="option"></param>
/// <param name="compressedData"></param>
/// <param name="decompressedSize"></param>
/// <param name="finalDecompressed"></param>
/// <returns></returns>
public static uint Decompress(CLAIMS_COMPRESSION_FORMAT option, byte[] compressedData, int decompressedSize, out byte[] finalDecompressed)
{
finalDecompressed = null;
uint ret = 0;
int compressWorkSpaceSize = 0, decompressWorkSpaceSize = 0;
ret = RtlGetCompressionWorkSpaceSize((uint)option, ref compressWorkSpaceSize, ref decompressWorkSpaceSize);
if (ret != 0)
return ret;
IntPtr workspace = Marshal.AllocHGlobal(decompressWorkSpaceSize);
IntPtr compressedPtr = Marshal.AllocHGlobal(compressedData.Length);
for (int i = 0; i < compressedData.Length; i++)
{
Marshal.WriteByte(compressedPtr, i, compressedData[i]);
}
IntPtr decompressedBuf = Marshal.AllocHGlobal(decompressedSize);
int finalSize = 0;
ret = RtlDecompressBufferEx((uint)option, decompressedBuf, decompressedSize, compressedPtr, compressedData.Length, ref finalSize, workspace);
if (ret != 0)
return ret;
finalDecompressed = new byte[finalSize];
for (int i = 0; i < finalSize; i++)
{
finalDecompressed[i] = Marshal.ReadByte(decompressedBuf, i);
}
return ret;
}
/// <summary>
/// decompress CLAIMS_SET
/// </summary>
/// <param name="option"></param>
/// <param name="compressedData"></param>
/// <param name="decompressedSize"></param>
/// <param name="finalDecompressed"></param>
/// <returns></returns>
public static uint Decompress(CLAIMS_COMPRESSION_FORMAT option, byte[] compressedData, int decompressedSize, out byte[] finalDecompressed)
{
finalDecompressed = null;
uint ret = 0;
int compressWorkSpaceSize = 0, decompressWorkSpaceSize = 0;
ret = RtlGetCompressionWorkSpaceSize((uint)option, ref compressWorkSpaceSize, ref decompressWorkSpaceSize);
if (ret != 0)
{
return(ret);
}
IntPtr workspace = Marshal.AllocHGlobal(decompressWorkSpaceSize);
IntPtr compressedPtr = Marshal.AllocHGlobal(compressedData.Length);
for (int i = 0; i < compressedData.Length; i++)
{
Marshal.WriteByte(compressedPtr, i, compressedData[i]);
}
IntPtr decompressedBuf = Marshal.AllocHGlobal(decompressedSize);
int finalSize = 0;
ret = RtlDecompressBufferEx((uint)option, decompressedBuf, decompressedSize, compressedPtr, compressedData.Length, ref finalSize, workspace);
if (ret != 0)
{
return(ret);
}
finalDecompressed = new byte[finalSize];
for (int i = 0; i < finalSize; i++)
{
finalDecompressed[i] = Marshal.ReadByte(decompressedBuf, i);
}
return(ret);
}
