internal bool Code(int dictionarySize, 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);
}
internal bool Code(int dictionarySize, OutWindow outWindow, RangeCoder.Decoder rangeDecoder)
{
int dictionarySizeCheck = Math.Max(dictionarySize, 1);
outWindow.CopyPending();
while (outWindow.HasSpace)
{
uint posState = (uint)outWindow._total & _posStateMask;
if (_isMatchDecoders[(_state._index << Base.K_NUM_POS_STATES_BITS_MAX) + posState].Decode(rangeDecoder) == 0)
{
byte b;
byte prevByte = outWindow.GetByte(0);
if (!_state.IsCharState())
{
b = _literalDecoder.DecodeWithMatchByte(rangeDecoder,
(uint)outWindow._total, prevByte,
outWindow.GetByte((int)_rep0));
}
else
{
b = _literalDecoder.DecodeNormal(rangeDecoder, (uint)outWindow._total, prevByte);
}
outWindow.PutByte(b);
_state.UpdateChar();
}
else
{
uint len;
if (_isRepDecoders[_state._index].Decode(rangeDecoder) == 1)
{
if (_isRepG0Decoders[_state._index].Decode(rangeDecoder) == 0)
{
if (
_isRep0LongDecoders[(_state._index << Base.K_NUM_POS_STATES_BITS_MAX) + posState].Decode(
rangeDecoder) == 0)
{
_state.UpdateShortRep();
outWindow.PutByte(outWindow.GetByte((int)_rep0));
continue;
}
}
else
{
UInt32 distance;
if (_isRepG1Decoders[_state._index].Decode(rangeDecoder) == 0)
{
distance = _rep1;
}
else
{
if (_isRepG2Decoders[_state._index].Decode(rangeDecoder) == 0)
{
distance = _rep2;
}
else
{
distance = _rep3;
_rep3 = _rep2;
}
_rep2 = _rep1;
}
_rep1 = _rep0;
_rep0 = distance;
}
len = _repLenDecoder.Decode(rangeDecoder, posState) + Base.K_MATCH_MIN_LEN;
_state.UpdateRep();
}
else
{
_rep3 = _rep2;
_rep2 = _rep1;
_rep1 = _rep0;
len = Base.K_MATCH_MIN_LEN + _lenDecoder.Decode(rangeDecoder, posState);
_state.UpdateMatch();
uint posSlot = _posSlotDecoder[Base.GetLenToPosState(len)].Decode(rangeDecoder);
if (posSlot >= Base.K_START_POS_MODEL_INDEX)
{
int numDirectBits = (int)((posSlot >> 1) - 1);
_rep0 = ((2 | (posSlot & 1)) << numDirectBits);
if (posSlot < Base.K_END_POS_MODEL_INDEX)
{
_rep0 += BitTreeDecoder.ReverseDecode(_posDecoders,
_rep0 - posSlot - 1, rangeDecoder, numDirectBits);
}
else
{
_rep0 += (rangeDecoder.DecodeDirectBits(
numDirectBits - Base.K_NUM_ALIGN_BITS) << Base.K_NUM_ALIGN_BITS);
_rep0 += _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);
}
internal bool Code(int dictionarySize, OutWindow outWindow, Decoder rangeDecoder)
{
int num = Math.Max(dictionarySize, 1);
outWindow.CopyPending();
while (outWindow.HasSpace)
{
uint num5;
uint posState = ((uint)outWindow.Total) & this.m_PosStateMask;
if (this.m_IsMatchDecoders[(this.state.Index << 4) + posState].Decode(rangeDecoder) == 0)
{
byte @byte = outWindow.GetByte(0);
byte b = this.state.IsCharState() ? this.m_LiteralDecoder.DecodeNormal(rangeDecoder, (uint)outWindow.Total, @byte) : this.m_LiteralDecoder.DecodeWithMatchByte(rangeDecoder, (uint)outWindow.Total, @byte, outWindow.GetByte((int)this.rep0));
outWindow.PutByte(b);
this.state.UpdateChar();
continue;
}
if (this.m_IsRepDecoders[this.state.Index].Decode(rangeDecoder) != 1)
{
this.rep3 = this.rep2;
this.rep2 = this.rep1;
this.rep1 = this.rep0;
num5 = 2 + this.m_LenDecoder.Decode(rangeDecoder, posState);
this.state.UpdateMatch();
uint num7 = this.m_PosSlotDecoder[Base.GetLenToPosState(num5)].Decode(rangeDecoder);
if (num7 < 4)
{
this.rep0 = num7;
}
else
{
int numBitLevels = ((int)(num7 >> 1)) - 1;
this.rep0 = (uint)((2 | (num7 & 1)) << (numBitLevels & 0x1f));
if (num7 < 14)
{
this.rep0 += BitTreeDecoder.ReverseDecode(this.m_PosDecoders, (this.rep0 - num7) - 1, rangeDecoder, numBitLevels);
}
else
{
this.rep0 += rangeDecoder.DecodeDirectBits(numBitLevels - 4) << 4;
this.rep0 += this.m_PosAlignDecoder.ReverseDecode(rangeDecoder);
}
}
}
else
{
if (this.m_IsRepG0Decoders[this.state.Index].Decode(rangeDecoder) == 0)
{
if (this.m_IsRep0LongDecoders[(this.state.Index << 4) + posState].Decode(rangeDecoder) == 0)
{
this.state.UpdateShortRep();
outWindow.PutByte(outWindow.GetByte((int)this.rep0));
continue;
}
}
else
{
uint num6;
if (this.m_IsRepG1Decoders[this.state.Index].Decode(rangeDecoder) == 0)
{
num6 = this.rep1;
}
else
{
if (this.m_IsRepG2Decoders[this.state.Index].Decode(rangeDecoder) == 0)
{
num6 = this.rep2;
}
else
{
num6 = this.rep3;
this.rep3 = this.rep2;
}
this.rep2 = this.rep1;
}
this.rep1 = this.rep0;
this.rep0 = num6;
}
num5 = this.m_RepLenDecoder.Decode(rangeDecoder, posState) + 2;
this.state.UpdateRep();
}
if ((this.rep0 >= outWindow.Total) || (this.rep0 >= num))
{
if (this.rep0 != uint.MaxValue)
{
throw new DataErrorException();
}
return(true);
}
outWindow.CopyBlock((int)this.rep0, (int)num5);
}
return(false);
}
