public unsafe static bool Decompress(byte[] inBuf, int inOffset, int inLength, byte[] outBuf, int outOffset, int expectedDecompressedLength)
{
if (expectedDecompressedLength == inLength)
{
Array.Copy(inBuf, inOffset, outBuf, outOffset, inLength);
return(true);
}
int num = expectedDecompressedLength;
fixed(byte *ptr = inBuf)
{
fixed(byte *ptr2 = outBuf)
{
if (Xpress.EcDecompressEx(new IntPtr((void *)((byte *)ptr + inOffset)), inLength, new IntPtr((void *)((byte *)ptr2 + outOffset)), ref num) == 0)
{
bool result;
if (num != expectedDecompressedLength)
{
result = false;
}
else
{
result = true;
}
return(result);
}
}
}
return(false);
}
protected void WriteXpressBlock(byte[] buf, int offset, int length)
{
int num;
Xpress.Compress(buf, offset, length, this.CompressBuf, 5, 65536, out num);
this.CompressBuf[0] = 2;
int num2 = 1;
ushort val = (ushort)(num - 1);
Serialization.SerializeUInt16(this.CompressBuf, ref num2, val);
val = (ushort)(length - 1);
Serialization.SerializeUInt16(this.CompressBuf, ref num2, val);
this.m_tcpChannel.Write(this.CompressBuf, 0, 5 + num);
}
private int ReadXpressBlock(byte[] buf, int off, int len)
{
if (this.m_xpressReadBuf == null)
{
this.m_xpressReadBuf = new byte[65536];
}
this.ReadChunk(this.m_readPacketHeaderBuf, 0, 4);
ushort num = BitConverter.ToUInt16(this.m_readPacketHeaderBuf, 0);
int num2 = (int)(num + 1);
num = BitConverter.ToUInt16(this.m_readPacketHeaderBuf, 2);
int num3 = (int)(num + 1);
this.ReadChunk(this.m_xpressReadBuf, 0, num2);
bool flag;
if (num3 <= len)
{
flag = Xpress.Decompress(this.m_xpressReadBuf, 0, num2, buf, off, num3);
}
else
{
if (this.m_decompressBuf == null)
{
this.m_decompressBuf = new byte[65536];
}
flag = Xpress.Decompress(this.m_xpressReadBuf, 0, num2, this.m_decompressBuf, 0, num3);
}
if (!flag)
{
NetworkPackagingLayer.Tracer.TraceError((long)this.GetHashCode(), "Decompression failed");
throw new NetworkCorruptDataException(this.PartnerNodeName);
}
this.TotalDecompressedBytesReceived += (long)num3;
this.TotalCompressedBytesReceived += (long)num2;
if (num3 <= len)
{
this.m_bytesRemainingToReadInCurrentBlock = 0;
return(num3);
}
this.m_decompressBufContentLen = num3;
this.m_bytesRemainingToReadInCurrentBlock = num3 - len;
Array.Copy(this.m_decompressBuf, 0, buf, off, len);
NetworkPackagingLayer.Tracer.TraceError <int, int>((long)this.GetHashCode(), "NetPkg.ReadXpressBlock: Had to buffer 0x{0:X} uncompressed bytes for the next fetch since only 0x{1:X} were requested.", this.m_bytesRemainingToReadInCurrentBlock, len);
return(len);
}
public unsafe static bool Compress(byte[] inBuf, int inOffset, int inLength, byte[] outBuf, int outOffset, int maxOutLength, out int compressedSize)
{
Dependencies.AssertRtl(outBuf.Length >= outOffset + maxOutLength, "BufferOverflow: Offset({0}) + Len({1}) exceeds buffer length({2})", new object[]
{
outOffset,
maxOutLength,
outBuf.Length
});
compressedSize = maxOutLength;
fixed(byte *ptr = inBuf)
{
fixed(byte *ptr2 = outBuf)
{
if (Xpress.EcCompressEx(new IntPtr((void *)((byte *)ptr + inOffset)), inLength, new IntPtr((void *)((byte *)ptr2 + outOffset)), ref compressedSize) == 0 && compressedSize < inLength)
{
return(true);
}
}
}
compressedSize = inLength;
Array.Copy(inBuf, inOffset, outBuf, outOffset, inLength);
return(false);
}
public static int SerializeToBuffer(JET_EMITDATACTX emitContext, byte[] logdata, int cblogdata, byte[] targetBuffer, int targetBufferOffsetToStart, out int totalCompressedSize)
{
NetworkChannelPacket networkChannelPacket = new NetworkChannelPacket(targetBuffer, targetBufferOffsetToStart);
networkChannelPacket.GrowthDisabled = true;
int num = BlockModeCompressedDataMsg.CalculateBlockCount(cblogdata);
int[] array = new int[num];
int num2 = 73 + 4 * num;
int num3 = num2 + targetBufferOffsetToStart;
int num4 = 0;
totalCompressedSize = 0;
int num5 = cblogdata;
for (int i = 0; i < num; i++)
{
int num6 = Math.Min(num5, 65536);
Xpress.Compress(logdata, num4, num6, targetBuffer, num3, num6, out array[i]);
num4 += num6;
num3 += array[i];
totalCompressedSize += array[i];
num5 -= num6;
}
networkChannelPacket.Append(1);
int val = num2 - 5 + totalCompressedSize;
networkChannelPacket.Append(val);
val = 1145261378;
networkChannelPacket.Append(val);
val = num2 - 5;
networkChannelPacket.Append(val);
DateTime utcNow = DateTime.UtcNow;
networkChannelPacket.Append(utcNow);
long val2 = 0L;
networkChannelPacket.Append(val2);
val2 = Win32StopWatch.GetSystemPerformanceCounter();
networkChannelPacket.Append(val2);
networkChannelPacket.Append(cblogdata);
val = emitContext.dwVersion;
networkChannelPacket.Append(val);
val2 = (long)emitContext.qwSequenceNum;
networkChannelPacket.Append(val2);
val = (int)emitContext.grbitOperationalFlags;
networkChannelPacket.Append(val);
DateTime time = DateTime.SpecifyKind(emitContext.logtimeEmit, DateTimeKind.Utc);
networkChannelPacket.Append(time);
val = emitContext.lgposLogData.lGeneration;
networkChannelPacket.Append(val);
ushort val3 = (ushort)emitContext.lgposLogData.isec;
networkChannelPacket.Append(val3);
val3 = (ushort)emitContext.lgposLogData.ib;
networkChannelPacket.Append(val3);
for (int j = 0; j < num; j++)
{
networkChannelPacket.Append(array[j]);
}
return(num2 + totalCompressedSize);
}
