594c3ed0f6
- Added SetCompressorDictSize (only works for LZMA) - Added SetCompressionLevel (only "works" for zlib and bzip2) - doesn't work for now - Section is only supposed to get 4 parameters if /o is specified - Updated version numbers git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3190 212acab6-be3b-0410-9dea-997c60f758d6
69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
// LZMALiteral.cpp
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#include "StdAfx.h"
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#include "LZMALiteral.h"
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namespace NCompress {
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namespace NLZMA {
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namespace NLiteral {
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void CEncoder2::Init()
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{
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for (int i = 0; i < 3; i++)
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for (int j = 1; j < (1 << 8); j++)
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_encoders[i][j].Init();
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}
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void CEncoder2::Encode(NRangeCoder::CEncoder *rangeEncoder,
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bool matchMode, BYTE matchByte, BYTE symbol)
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{
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UINT32 context = 1;
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bool same = true;
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for (int i = 7; i >= 0; i--)
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{
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UINT32 bit = (symbol >> i) & 1;
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UINT state;
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if (matchMode && same)
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{
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UINT32 matchBit = (matchByte >> i) & 1;
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state = 1 + matchBit;
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same = (matchBit == bit);
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}
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else
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state = 0;
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_encoders[state][context].Encode(rangeEncoder, bit);
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context = (context << 1) | bit;
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}
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}
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UINT32 CEncoder2::GetPrice(bool matchMode, BYTE matchByte, BYTE symbol) const
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{
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UINT32 price = 0;
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UINT32 context = 1;
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int i = 7;
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if (matchMode)
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{
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for (; i >= 0; i--)
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{
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UINT32 matchBit = (matchByte >> i) & 1;
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UINT32 bit = (symbol >> i) & 1;
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price += _encoders[1 + matchBit][context].GetPrice(bit);
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context = (context << 1) | bit;
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if (matchBit != bit)
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{
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i--;
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break;
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}
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}
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}
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for (; i >= 0; i--)
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{
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UINT32 bit = (symbol >> i) & 1;
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price += _encoders[0][context].GetPrice(bit);
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context = (context << 1) | bit;
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}
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return price;
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};
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}}}
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