internal static BlockModeCompressedDataMsg ReadFromNet(NetworkChannel ch, byte[] workingBuf, int startOffset)
{
int len = 52;
ch.Read(workingBuf, startOffset, len);
BlockModeCompressedDataMsg blockModeCompressedDataMsg = new BlockModeCompressedDataMsg();
BufDeserializer bufDeserializer = new BufDeserializer(workingBuf, startOffset);
blockModeCompressedDataMsg.FlagsUsed = (BlockModeCompressedDataMsg.Flags)bufDeserializer.ExtractInt64();
blockModeCompressedDataMsg.RequestAckCounter = bufDeserializer.ExtractInt64();
blockModeCompressedDataMsg.LogDataLength = bufDeserializer.ExtractInt32();
if (blockModeCompressedDataMsg.LogDataLength > 1048576)
{
throw new NetworkCorruptDataException(ch.PartnerNodeName);
}
blockModeCompressedDataMsg.EmitContext = new JET_EMITDATACTX();
blockModeCompressedDataMsg.EmitContext.cbLogData = (long)blockModeCompressedDataMsg.LogDataLength;
blockModeCompressedDataMsg.EmitContext.dwVersion = bufDeserializer.ExtractInt32();
blockModeCompressedDataMsg.EmitContext.qwSequenceNum = bufDeserializer.ExtractUInt64();
blockModeCompressedDataMsg.EmitContext.grbitOperationalFlags = (ShadowLogEmitGrbit)bufDeserializer.ExtractUInt32();
blockModeCompressedDataMsg.EmitContext.logtimeEmit = bufDeserializer.ExtractDateTime();
JET_LGPOS lgposLogData = default(JET_LGPOS);
lgposLogData.lGeneration = bufDeserializer.ExtractInt32();
lgposLogData.isec = (int)bufDeserializer.ExtractUInt16();
lgposLogData.ib = (int)bufDeserializer.ExtractUInt16();
blockModeCompressedDataMsg.EmitContext.lgposLogData = lgposLogData;
if (blockModeCompressedDataMsg.LogDataLength > 0)
{
int num = BlockModeCompressedDataMsg.CalculateBlockCount(blockModeCompressedDataMsg.LogDataLength);
blockModeCompressedDataMsg.CompressedLengths = new int[num];
len = num * 4;
ch.Read(workingBuf, startOffset, len);
bufDeserializer.Reset(workingBuf, startOffset);
for (int i = 0; i < num; i++)
{
int num2 = bufDeserializer.ExtractInt32();
if (num2 <= 0 || num2 > 65536)
{
throw new NetworkCorruptDataException(ch.PartnerNodeName);
}
blockModeCompressedDataMsg.CompressedLengths[i] = num2;
}
}
return(blockModeCompressedDataMsg);
}
internal BlockModeCompressedDataMsg(NetworkChannel channel, byte[] packetContent) : base(channel, NetworkChannelMessage.MessageType.BlockModeCompressedData, packetContent)
{
this.FlagsUsed = (BlockModeCompressedDataMsg.Flags)base.Packet.ExtractInt64();
this.RequestAckCounter = base.Packet.ExtractInt64();
this.LogDataLength = base.Packet.ExtractInt32();
if (this.LogDataLength > 1048576)
{
throw new NetworkCorruptDataException(channel.PartnerNodeName);
}
this.EmitContext = new JET_EMITDATACTX();
this.EmitContext.cbLogData = (long)this.LogDataLength;
this.EmitContext.dwVersion = base.Packet.ExtractInt32();
this.EmitContext.qwSequenceNum = base.Packet.ExtractUInt64();
this.EmitContext.grbitOperationalFlags = (ShadowLogEmitGrbit)base.Packet.ExtractUInt32();
this.EmitContext.logtimeEmit = base.Packet.ExtractDateTime();
JET_LGPOS lgposLogData = default(JET_LGPOS);
lgposLogData.lGeneration = base.Packet.ExtractInt32();
lgposLogData.isec = (int)base.Packet.ExtractUInt16();
lgposLogData.ib = (int)base.Packet.ExtractUInt16();
this.EmitContext.lgposLogData = lgposLogData;
if (this.LogDataLength > 0)
{
int num = BlockModeCompressedDataMsg.CalculateBlockCount(this.LogDataLength);
this.CompressedLengths = new int[num];
for (int i = 0; i < num; i++)
{
int num2 = base.Packet.ExtractInt32();
if (num2 <= 0 || num2 > 65536)
{
throw new NetworkCorruptDataException(channel.PartnerNodeName);
}
this.CompressedLengths[i] = num2;
}
}
}
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);
}
public static int CalculateWorstLength(JET_EMITDATACTX emitContext, int cblogdata)
{
int num = BlockModeCompressedDataMsg.CalculateBlockCount(cblogdata);
return(73 + 4 * num + cblogdata);
}
internal static int GetOffsetToCompressedData(int uncompressedSize)
{
return(73 + 4 * BlockModeCompressedDataMsg.CalculateBlockCount(uncompressedSize));
}