xevion/easy7zip
1
0
Fork 0
mirror of https://github.com/Xevion/easy7zip.git synced 2025-12-10 18:07:07 -06:00
Code Issues Packages Projects Releases Wiki Activity

4.20

Browse Source
This commit is contained in:
Igor Pavlov
2005-05-30 00:00:00 +00:00
committed by Kornel Lesiński
parent 8c1b5c7b7e
commit 3c510ba80b
926 changed files with 40559 additions and 23519 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
7zip/Compress/LZMA/LZMA.h
View File

@@ -1,55 +1,30 @@
// LZMA.h
// #pragma once
#include "LZMALen.h"
#ifndef __LZMA_H
#define __LZMA_H
namespace NCompress {
namespace NLZMA {
const UINT32 kNumRepDistances = 4;
const UInt32 kNumRepDistances = 4;
const BYTE kNumStates = 12;
const int kNumStates = 12;
const BYTE kLiteralNextStates[kNumStates] = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
const BYTE kMatchNextStates[kNumStates] = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
const BYTE kRepNextStates[kNumStates] = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
const BYTE kShortRepNextStates[kNumStates]= {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
const Byte kLiteralNextStates[kNumStates] = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
const Byte kMatchNextStates[kNumStates] = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
const Byte kRepNextStates[kNumStates] = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
const Byte kShortRepNextStates[kNumStates]= {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
class CState
{
public:
BYTE Index;
void Init()
{ Index = 0; }
void UpdateChar()
{ Index = kLiteralNextStates[Index]; }
void UpdateMatch()
{ Index = kMatchNextStates[Index]; }
void UpdateRep()
{ Index = kRepNextStates[Index]; }
void UpdateShortRep()
{ Index = kShortRepNextStates[Index]; }
};
class CBaseCoder
{
protected:
CState _state;
BYTE _previousByte;
bool _peviousIsMatch;
UINT32 _repDistances[kNumRepDistances];
void Init()
{
_state.Init();
_previousByte = 0;
_peviousIsMatch = false;
for(int i = 0 ; i < kNumRepDistances; i++)
_repDistances[i] = 0;
}
Byte Index;
void Init() { Index = 0; }
void UpdateChar() { Index = kLiteralNextStates[Index]; }
void UpdateMatch() { Index = kMatchNextStates[Index]; }
void UpdateRep() { Index = kRepNextStates[Index]; }
void UpdateShortRep() { Index = kShortRepNextStates[Index]; }
bool IsCharState() const { return Index < 7; }
};
const int kNumPosSlotBits = 6;
@@ -57,8 +32,9 @@ const int kDicLogSizeMin = 0;
const int kDicLogSizeMax = 32;
const int kDistTableSizeMax = kDicLogSizeMax * 2;
const UINT32 kNumLenToPosStates = 4;
inline UINT32 GetLenToPosState(UINT32 len)
const UInt32 kNumLenToPosStates = 4;
inline UInt32 GetLenToPosState(UInt32 len)
{
len -= 2;
if (len < kNumLenToPosStates)
@@ -66,31 +42,41 @@ inline UINT32 GetLenToPosState(UINT32 len)
return kNumLenToPosStates - 1;
}
const UINT32 kMatchMinLen = 2;
namespace NLength {
const UINT32 kMatchMaxLen = kMatchMinLen + NLength::kNumSymbolsTotal - 1;
const int kNumPosStatesBitsMax = 4;
const UInt32 kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
const int kNumPosStatesBitsEncodingMax = 4;
const UInt32 kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
const int kNumLowBits = 3;
const int kNumMidBits = 3;
const int kNumHighBits = 8;
const UInt32 kNumLowSymbols = 1 << kNumLowBits;
const UInt32 kNumMidSymbols = 1 << kNumMidBits;
const UInt32 kNumSymbolsTotal = kNumLowSymbols + kNumMidSymbols + (1 << kNumHighBits);
}
const UInt32 kMatchMinLen = 2;
const UInt32 kMatchMaxLen = kMatchMinLen + NLength::kNumSymbolsTotal - 1;
const int kNumAlignBits = 4;
const UINT32 kAlignTableSize = 1 << kNumAlignBits;
const UINT32 kAlignMask = (kAlignTableSize - 1);
const UInt32 kAlignTableSize = 1 << kNumAlignBits;
const UInt32 kAlignMask = (kAlignTableSize - 1);
const UINT32 kStartPosModelIndex = 4;
const UINT32 kEndPosModelIndex = 14;
const UINT32 kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
const UInt32 kStartPosModelIndex = 4;
const UInt32 kEndPosModelIndex = 14;
const UInt32 kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
const UINT32 kNumFullDistances = 1 << (kEndPosModelIndex / 2);
const UINT32 kMainChoiceLiteralIndex = 0;
const UINT32 kMainChoiceMatchIndex = 1;
const UINT32 kMatchChoiceDistanceIndex= 0;
const UINT32 kMatchChoiceRepetitionIndex = 1;
const int kNumMoveBits = 5;
const UInt32 kNumFullDistances = 1 << (kEndPosModelIndex / 2);
const int kNumLitPosStatesBitsEncodingMax = 4;
const int kNumLitContextBitsMax = 8;
const int kNumMoveBits = 5;
}}
#endif