public void Code(System.IO.Stream inStream, System.IO.Stream outStream,
long inSize, long outSize, ICodeProgress progress)
{
Init(inStream, outStream);
LZMABase.State state = new LZMABase.State();
state.Init();
uint rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
ulong nowPos64 = 0;
var outSize64 = (ulong)outSize;
if (nowPos64 < outSize64)
{
if (m_IsMatchDecoders[state.Index << LZMABase.kNumPosStatesBitsMax].Decode(m_RangeDecoder) != 0)
{
throw new DataErrorException();
}
state.UpdateChar();
byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0, 0);
m_OutWindow.PutByte(b);
nowPos64++;
}
while (nowPos64 < outSize64)
{
// UInt64 next = Math.Min(nowPos64 + (1 << 18), outSize64);
// while(nowPos64 < next)
{
uint posState = (uint)nowPos64 & m_PosStateMask;
if (m_IsMatchDecoders[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
{
byte b;
byte prevByte = m_OutWindow.GetByte(0);
if (!state.IsCharState())
{
b = m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder,
(uint)nowPos64, prevByte, m_OutWindow.GetByte(rep0));
}
else
{
b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint)nowPos64, prevByte);
}
m_OutWindow.PutByte(b);
state.UpdateChar();
nowPos64++;
}
else
{
uint len;
if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
{
if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
if (m_IsRep0LongDecoders[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
{
state.UpdateShortRep();
m_OutWindow.PutByte(m_OutWindow.GetByte(rep0));
nowPos64++;
continue;
}
}
else
{
UInt32 distance;
if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
distance = rep1;
}
else
{
if (m_IsRepG2Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
distance = rep2;
}
else
{
distance = rep3;
rep3 = rep2;
}
rep2 = rep1;
}
rep1 = rep0;
rep0 = distance;
}
len = m_RepLenDecoder.Decode(m_RangeDecoder, posState) + LZMABase.kMatchMinLen;
state.UpdateRep();
}
else
{
rep3 = rep2;
rep2 = rep1;
rep1 = rep0;
len = LZMABase.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
state.UpdateMatch();
uint posSlot = m_PosSlotDecoder[LZMABase.GetLenToPosState(len)].Decode(m_RangeDecoder);
if (posSlot >= LZMABase.kStartPosModelIndex)
{
int numDirectBits = (int)((posSlot >> 1) - 1);
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
if (posSlot < LZMABase.kEndPosModelIndex)
{
rep0 += BitTreeDecoder.ReverseDecode(m_PosDecoders,
rep0 - posSlot - 1, m_RangeDecoder, numDirectBits);
}
else
{
rep0 += (m_RangeDecoder.DecodeDirectBits(
numDirectBits - LZMABase.kNumAlignBits) << LZMABase.kNumAlignBits);
rep0 += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
}
}
else
{
rep0 = posSlot;
}
}
if (rep0 >= m_OutWindow.TrainSize + nowPos64 || rep0 >= m_DictionarySizeCheck)
{
if (rep0 == 0xFFFFFFFF)
{
break;
}
throw new DataErrorException();
}
m_OutWindow.CopyBlock(rep0, len);
nowPos64 += len;
}
}
}
m_OutWindow.Flush();
m_OutWindow.ReleaseStream();
m_RangeDecoder.ReleaseStream();
}
uint GetPureRepPrice(uint repIndex, LZMABase.State state, uint posState)
{
uint price;
if (repIndex == 0)
{
price = _isRepG0[state.Index].GetPrice0();
price += _isRep0Long[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice1();
}
else
{
price = _isRepG0[state.Index].GetPrice1();
if (repIndex == 1)
price += _isRepG1[state.Index].GetPrice0();
else
{
price += _isRepG1[state.Index].GetPrice1();
price += _isRepG2[state.Index].GetPrice(repIndex - 2);
}
}
return price;
}
uint GetRepPrice(uint repIndex, uint len, LZMABase.State state, uint posState)
{
uint price = _repMatchLenEncoder.GetPrice(len - LZMABase.kMatchMinLen, posState);
return price + GetPureRepPrice(repIndex, state, posState);
}
uint GetRepLen1Price(LZMABase.State state, uint posState)
{
return _isRepG0[state.Index].GetPrice0() +
_isRep0Long[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice0();
}