internal bool Code(int dictionarySize, LZ.OutWindow outWindow, RangeCoder.Decoder rangeDecoder)
{
int dictionarySizeCheck = Math.Max(dictionarySize, 1);
outWindow.CopyPending();
while (outWindow.HasSpace)
{
uint posState = (uint)outWindow.Total & m_PosStateMask;
if (m_IsMatchDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(rangeDecoder) == 0)
{
byte b;
byte prevByte = outWindow.GetByte(0);
if (!state.IsCharState())
{
b = m_LiteralDecoder.DecodeWithMatchByte(rangeDecoder,
(uint)outWindow.Total, prevByte, outWindow.GetByte((int)rep0));
}
else
{
b = m_LiteralDecoder.DecodeNormal(rangeDecoder, (uint)outWindow.Total, prevByte);
}
outWindow.PutByte(b);
state.UpdateChar();
}
else
{
uint len;
if (m_IsRepDecoders[state.Index].Decode(rangeDecoder) == 1)
{
if (m_IsRepG0Decoders[state.Index].Decode(rangeDecoder) == 0)
{
if (m_IsRep0LongDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(rangeDecoder) == 0)
{
state.UpdateShortRep();
outWindow.PutByte(outWindow.GetByte((int)rep0));
continue;
}
}
else
{
UInt32 distance;
if (m_IsRepG1Decoders[state.Index].Decode(rangeDecoder) == 0)
{
distance = rep1;
}
else
{
if (m_IsRepG2Decoders[state.Index].Decode(rangeDecoder) == 0)
{
distance = rep2;
}
else
{
distance = rep3;
rep3 = rep2;
}
rep2 = rep1;
}
rep1 = rep0;
rep0 = distance;
}
len = m_RepLenDecoder.Decode(rangeDecoder, posState) + Base.kMatchMinLen;
state.UpdateRep();
}
else
{
rep3 = rep2;
rep2 = rep1;
rep1 = rep0;
len = Base.kMatchMinLen + m_LenDecoder.Decode(rangeDecoder, posState);
state.UpdateMatch();
uint posSlot = m_PosSlotDecoder[Base.GetLenToPosState(len)].Decode(rangeDecoder);
if (posSlot >= Base.kStartPosModelIndex)
{
int numDirectBits = (int)((posSlot >> 1) - 1);
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
if (posSlot < Base.kEndPosModelIndex)
{
rep0 += BitTreeDecoder.ReverseDecode(m_PosDecoders,
rep0 - posSlot - 1, rangeDecoder, numDirectBits);
}
else
{
rep0 += (rangeDecoder.DecodeDirectBits(
numDirectBits - Base.kNumAlignBits) << Base.kNumAlignBits);
rep0 += m_PosAlignDecoder.ReverseDecode(rangeDecoder);
}
}
else
{
rep0 = posSlot;
}
}
if (rep0 >= outWindow.Total || rep0 >= dictionarySizeCheck)
{
if (rep0 == 0xFFFFFFFF)
{
return(true);
}
throw new DataErrorException();
}
outWindow.CopyBlock((int)rep0, (int)len);
}
}
return(false);
}
