--- a/misc/libphysfs/lzma/C/Compress/Lzma/LzmaStateDecode.c Wed May 16 18:22:28 2018 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,521 +0,0 @@
-/*
- LzmaStateDecode.c
- LZMA Decoder (State version)
-
- LZMA SDK 4.40 Copyright (c) 1999-2006 Igor Pavlov (2006-05-01)
- http://www.7-zip.org/
-
- LZMA SDK is licensed under two licenses:
- 1) GNU Lesser General Public License (GNU LGPL)
- 2) Common Public License (CPL)
- It means that you can select one of these two licenses and
- follow rules of that license.
-
- SPECIAL EXCEPTION:
- Igor Pavlov, as the author of this Code, expressly permits you to
- statically or dynamically link your Code (or bind by name) to the
- interfaces of this file without subjecting your linked Code to the
- terms of the CPL or GNU LGPL. Any modifications or additions
- to this file, however, are subject to the LGPL or CPL terms.
-*/
-
-#include "LzmaStateDecode.h"
-
-#define kNumTopBits 24
-#define kTopValue ((UInt32)1 << kNumTopBits)
-
-#define kNumBitModelTotalBits 11
-#define kBitModelTotal (1 << kNumBitModelTotalBits)
-#define kNumMoveBits 5
-
-#define RC_READ_BYTE (*Buffer++)
-
-#define RC_INIT Code = 0; Range = 0xFFFFFFFF; \
- { int i; for(i = 0; i < 5; i++) { Code = (Code << 8) | RC_READ_BYTE; }}
-
-#define RC_NORMALIZE if (Range < kTopValue) { Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
-
-#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
-#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
-#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
-
-#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
- { UpdateBit0(p); mi <<= 1; A0; } else \
- { UpdateBit1(p); mi = (mi + mi) + 1; A1; }
-
-#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)
-
-#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
- { int i = numLevels; res = 1; \
- do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
- res -= (1 << numLevels); }
-
-
-#define kNumPosBitsMax 4
-#define kNumPosStatesMax (1 << kNumPosBitsMax)
-
-#define kLenNumLowBits 3
-#define kLenNumLowSymbols (1 << kLenNumLowBits)
-#define kLenNumMidBits 3
-#define kLenNumMidSymbols (1 << kLenNumMidBits)
-#define kLenNumHighBits 8
-#define kLenNumHighSymbols (1 << kLenNumHighBits)
-
-#define LenChoice 0
-#define LenChoice2 (LenChoice + 1)
-#define LenLow (LenChoice2 + 1)
-#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
-#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
-#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
-
-
-#define kNumStates 12
-#define kNumLitStates 7
-
-#define kStartPosModelIndex 4
-#define kEndPosModelIndex 14
-#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
-
-#define kNumPosSlotBits 6
-#define kNumLenToPosStates 4
-
-#define kNumAlignBits 4
-#define kAlignTableSize (1 << kNumAlignBits)
-
-#define kMatchMinLen 2
-
-#define IsMatch 0
-#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
-#define IsRepG0 (IsRep + kNumStates)
-#define IsRepG1 (IsRepG0 + kNumStates)
-#define IsRepG2 (IsRepG1 + kNumStates)
-#define IsRep0Long (IsRepG2 + kNumStates)
-#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
-#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
-#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
-#define LenCoder (Align + kAlignTableSize)
-#define RepLenCoder (LenCoder + kNumLenProbs)
-#define Literal (RepLenCoder + kNumLenProbs)
-
-#if Literal != LZMA_BASE_SIZE
-StopCompilingDueBUG
-#endif
-
-/* kRequiredInBufferSize = number of required input bytes for worst case:
- longest match with longest distance.
- kLzmaInBufferSize must be larger than kRequiredInBufferSize
- 23 bits = 2 (match select) + 10 (len) + 6 (distance) + 4(align) + 1 (RC_NORMALIZE)
-*/
-
-#define kRequiredInBufferSize ((23 * (kNumBitModelTotalBits - kNumMoveBits + 1) + 26 + 9) / 8)
-
-#define kLzmaStreamWasFinishedId (-1)
-
-int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
-{
- unsigned char prop0;
- if (size < LZMA_PROPERTIES_SIZE)
- return LZMA_RESULT_DATA_ERROR;
- prop0 = propsData[0];
- if (prop0 >= (9 * 5 * 5))
- return LZMA_RESULT_DATA_ERROR;
- {
- for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
- for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
- propsRes->lc = prop0;
- /*
- unsigned char remainder = (unsigned char)(prop0 / 9);
- propsRes->lc = prop0 % 9;
- propsRes->pb = remainder / 5;
- propsRes->lp = remainder % 5;
- */
- }
-
- {
- int i;
- propsRes->DictionarySize = 0;
- for (i = 0; i < 4; i++)
- propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
- if (propsRes->DictionarySize == 0)
- propsRes->DictionarySize = 1;
- return LZMA_RESULT_OK;
- }
-}
-
-int LzmaDecode(
- CLzmaDecoderState *vs,
- const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
- unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed,
- int finishDecoding)
-{
- UInt32 Range = vs->Range;
- UInt32 Code = vs->Code;
-
- unsigned char *Buffer = vs->Buffer;
- int BufferSize = vs->BufferSize; /* don't change it to unsigned int */
- CProb *p = vs->Probs;
-
- int state = vs->State;
- unsigned char previousByte;
- UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
- SizeT nowPos = 0;
- UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
- UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
- int lc = vs->Properties.lc;
- int len = vs->RemainLen;
- UInt32 globalPos = vs->GlobalPos;
- UInt32 distanceLimit = vs->DistanceLimit;
-
- unsigned char *dictionary = vs->Dictionary;
- UInt32 dictionarySize = vs->Properties.DictionarySize;
- UInt32 dictionaryPos = vs->DictionaryPos;
-
- unsigned char tempDictionary[4];
-
- (*inSizeProcessed) = 0;
- (*outSizeProcessed) = 0;
- if (len == kLzmaStreamWasFinishedId)
- return LZMA_RESULT_OK;
-
- if (dictionarySize == 0)
- {
- dictionary = tempDictionary;
- dictionarySize = 1;
- tempDictionary[0] = vs->TempDictionary[0];
- }
-
- if (len == kLzmaNeedInitId)
- {
- while (inSize > 0 && BufferSize < kLzmaInBufferSize)
- {
- Buffer[BufferSize++] = *inStream++;
- (*inSizeProcessed)++;
- inSize--;
- }
- if (BufferSize < 5)
- {
- vs->BufferSize = BufferSize;
- return finishDecoding ? LZMA_RESULT_DATA_ERROR : LZMA_RESULT_OK;
- }
- {
- UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
- UInt32 i;
- for (i = 0; i < numProbs; i++)
- p[i] = kBitModelTotal >> 1;
- rep0 = rep1 = rep2 = rep3 = 1;
- state = 0;
- globalPos = 0;
- distanceLimit = 0;
- dictionaryPos = 0;
- dictionary[dictionarySize - 1] = 0;
- RC_INIT;
- }
- len = 0;
- }
- while(len != 0 && nowPos < outSize)
- {
- UInt32 pos = dictionaryPos - rep0;
- if (pos >= dictionarySize)
- pos += dictionarySize;
- outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
- if (++dictionaryPos == dictionarySize)
- dictionaryPos = 0;
- len--;
- }
- if (dictionaryPos == 0)
- previousByte = dictionary[dictionarySize - 1];
- else
- previousByte = dictionary[dictionaryPos - 1];
-
- for (;;)
- {
- int bufferPos = (int)(Buffer - vs->Buffer);
- if (BufferSize - bufferPos < kRequiredInBufferSize)
- {
- int i;
- BufferSize -= bufferPos;
- if (BufferSize < 0)
- return LZMA_RESULT_DATA_ERROR;
- for (i = 0; i < BufferSize; i++)
- vs->Buffer[i] = Buffer[i];
- Buffer = vs->Buffer;
- while (inSize > 0 && BufferSize < kLzmaInBufferSize)
- {
- Buffer[BufferSize++] = *inStream++;
- (*inSizeProcessed)++;
- inSize--;
- }
- if (BufferSize < kRequiredInBufferSize && !finishDecoding)
- break;
- }
- if (nowPos >= outSize)
- break;
- {
- CProb *prob;
- UInt32 bound;
- int posState = (int)((nowPos + globalPos) & posStateMask);
-
- prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
- IfBit0(prob)
- {
- int symbol = 1;
- UpdateBit0(prob)
- prob = p + Literal + (LZMA_LIT_SIZE *
- ((((nowPos + globalPos)& literalPosMask) << lc) + (previousByte >> (8 - lc))));
-
- if (state >= kNumLitStates)
- {
- int matchByte;
- UInt32 pos = dictionaryPos - rep0;
- if (pos >= dictionarySize)
- pos += dictionarySize;
- matchByte = dictionary[pos];
- do
- {
- int bit;
- CProb *probLit;
- matchByte <<= 1;
- bit = (matchByte & 0x100);
- probLit = prob + 0x100 + bit + symbol;
- RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
- }
- while (symbol < 0x100);
- }
- while (symbol < 0x100)
- {
- CProb *probLit = prob + symbol;
- RC_GET_BIT(probLit, symbol)
- }
- previousByte = (unsigned char)symbol;
-
- outStream[nowPos++] = previousByte;
- if (distanceLimit < dictionarySize)
- distanceLimit++;
-
- dictionary[dictionaryPos] = previousByte;
- if (++dictionaryPos == dictionarySize)
- dictionaryPos = 0;
- if (state < 4) state = 0;
- else if (state < 10) state -= 3;
- else state -= 6;
- }
- else
- {
- UpdateBit1(prob);
- prob = p + IsRep + state;
- IfBit0(prob)
- {
- UpdateBit0(prob);
- rep3 = rep2;
- rep2 = rep1;
- rep1 = rep0;
- state = state < kNumLitStates ? 0 : 3;
- prob = p + LenCoder;
- }
- else
- {
- UpdateBit1(prob);
- prob = p + IsRepG0 + state;
- IfBit0(prob)
- {
- UpdateBit0(prob);
- prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
- IfBit0(prob)
- {
- UInt32 pos;
- UpdateBit0(prob);
- if (distanceLimit == 0)
- return LZMA_RESULT_DATA_ERROR;
- if (distanceLimit < dictionarySize)
- distanceLimit++;
- state = state < kNumLitStates ? 9 : 11;
- pos = dictionaryPos - rep0;
- if (pos >= dictionarySize)
- pos += dictionarySize;
- previousByte = dictionary[pos];
- dictionary[dictionaryPos] = previousByte;
- if (++dictionaryPos == dictionarySize)
- dictionaryPos = 0;
- outStream[nowPos++] = previousByte;
- continue;
- }
- else
- {
- UpdateBit1(prob);
- }
- }
- else
- {
- UInt32 distance;
- UpdateBit1(prob);
- prob = p + IsRepG1 + state;
- IfBit0(prob)
- {
- UpdateBit0(prob);
- distance = rep1;
- }
- else
- {
- UpdateBit1(prob);
- prob = p + IsRepG2 + state;
- IfBit0(prob)
- {
- UpdateBit0(prob);
- distance = rep2;
- }
- else
- {
- UpdateBit1(prob);
- distance = rep3;
- rep3 = rep2;
- }
- rep2 = rep1;
- }
- rep1 = rep0;
- rep0 = distance;
- }
- state = state < kNumLitStates ? 8 : 11;
- prob = p + RepLenCoder;
- }
- {
- int numBits, offset;
- CProb *probLen = prob + LenChoice;
- IfBit0(probLen)
- {
- UpdateBit0(probLen);
- probLen = prob + LenLow + (posState << kLenNumLowBits);
- offset = 0;
- numBits = kLenNumLowBits;
- }
- else
- {
- UpdateBit1(probLen);
- probLen = prob + LenChoice2;
- IfBit0(probLen)
- {
- UpdateBit0(probLen);
- probLen = prob + LenMid + (posState << kLenNumMidBits);
- offset = kLenNumLowSymbols;
- numBits = kLenNumMidBits;
- }
- else
- {
- UpdateBit1(probLen);
- probLen = prob + LenHigh;
- offset = kLenNumLowSymbols + kLenNumMidSymbols;
- numBits = kLenNumHighBits;
- }
- }
- RangeDecoderBitTreeDecode(probLen, numBits, len);
- len += offset;
- }
-
- if (state < 4)
- {
- int posSlot;
- state += kNumLitStates;
- prob = p + PosSlot +
- ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
- kNumPosSlotBits);
- RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
- if (posSlot >= kStartPosModelIndex)
- {
- int numDirectBits = ((posSlot >> 1) - 1);
- rep0 = (2 | ((UInt32)posSlot & 1));
- if (posSlot < kEndPosModelIndex)
- {
- rep0 <<= numDirectBits;
- prob = p + SpecPos + rep0 - posSlot - 1;
- }
- else
- {
- numDirectBits -= kNumAlignBits;
- do
- {
- RC_NORMALIZE
- Range >>= 1;
- rep0 <<= 1;
- if (Code >= Range)
- {
- Code -= Range;
- rep0 |= 1;
- }
- }
- while (--numDirectBits != 0);
- prob = p + Align;
- rep0 <<= kNumAlignBits;
- numDirectBits = kNumAlignBits;
- }
- {
- int i = 1;
- int mi = 1;
- do
- {
- CProb *prob3 = prob + mi;
- RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
- i <<= 1;
- }
- while(--numDirectBits != 0);
- }
- }
- else
- rep0 = posSlot;
- if (++rep0 == (UInt32)(0))
- {
- /* it's for stream version */
- len = kLzmaStreamWasFinishedId;
- break;
- }
- }
-
- len += kMatchMinLen;
- if (rep0 > distanceLimit)
- return LZMA_RESULT_DATA_ERROR;
- if (dictionarySize - distanceLimit > (UInt32)len)
- distanceLimit += len;
- else
- distanceLimit = dictionarySize;
-
- do
- {
- UInt32 pos = dictionaryPos - rep0;
- if (pos >= dictionarySize)
- pos += dictionarySize;
- previousByte = dictionary[pos];
- dictionary[dictionaryPos] = previousByte;
- if (++dictionaryPos == dictionarySize)
- dictionaryPos = 0;
- len--;
- outStream[nowPos++] = previousByte;
- }
- while(len != 0 && nowPos < outSize);
- }
- }
- }
- RC_NORMALIZE;
-
- BufferSize -= (int)(Buffer - vs->Buffer);
- if (BufferSize < 0)
- return LZMA_RESULT_DATA_ERROR;
- {
- int i;
- for (i = 0; i < BufferSize; i++)
- vs->Buffer[i] = Buffer[i];
- }
- vs->BufferSize = BufferSize;
- vs->Range = Range;
- vs->Code = Code;
- vs->DictionaryPos = dictionaryPos;
- vs->GlobalPos = (UInt32)(globalPos + nowPos);
- vs->DistanceLimit = distanceLimit;
- vs->Reps[0] = rep0;
- vs->Reps[1] = rep1;
- vs->Reps[2] = rep2;
- vs->Reps[3] = rep3;
- vs->State = state;
- vs->RemainLen = len;
- vs->TempDictionary[0] = tempDictionary[0];
-
- (*outSizeProcessed) = nowPos;
- return LZMA_RESULT_OK;
-}