diff -r 5f819b90d479 -r 99b265e0d1d0 misc/libphysfs/lzma/C/Compress/Lzma/LzmaDecodeSize.c --- a/misc/libphysfs/lzma/C/Compress/Lzma/LzmaDecodeSize.c Thu Oct 11 23:43:31 2018 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,712 +0,0 @@ -/* - LzmaDecodeSize.c - LZMA Decoder (optimized for Size 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 "LzmaDecode.h" - -#define kNumTopBits 24 -#define kTopValue ((UInt32)1 << kNumTopBits) - -#define kNumBitModelTotalBits 11 -#define kBitModelTotal (1 << kNumBitModelTotalBits) -#define kNumMoveBits 5 - -typedef struct _CRangeDecoder -{ - const Byte *Buffer; - const Byte *BufferLim; - UInt32 Range; - UInt32 Code; - #ifdef _LZMA_IN_CB - ILzmaInCallback *InCallback; - int Result; - #endif - int ExtraBytes; -} CRangeDecoder; - -Byte RangeDecoderReadByte(CRangeDecoder *rd) -{ - if (rd->Buffer == rd->BufferLim) - { - #ifdef _LZMA_IN_CB - SizeT size; - rd->Result = rd->InCallback->Read(rd->InCallback, &rd->Buffer, &size); - rd->BufferLim = rd->Buffer + size; - if (size == 0) - #endif - { - rd->ExtraBytes = 1; - return 0xFF; - } - } - return (*rd->Buffer++); -} - -/* #define ReadByte (*rd->Buffer++) */ -#define ReadByte (RangeDecoderReadByte(rd)) - -void RangeDecoderInit(CRangeDecoder *rd - #ifndef _LZMA_IN_CB - , const Byte *stream, SizeT bufferSize - #endif - ) -{ - int i; - #ifdef _LZMA_IN_CB - rd->Buffer = rd->BufferLim = 0; - #else - rd->Buffer = stream; - rd->BufferLim = stream + bufferSize; - #endif - rd->ExtraBytes = 0; - rd->Code = 0; - rd->Range = (0xFFFFFFFF); - for(i = 0; i < 5; i++) - rd->Code = (rd->Code << 8) | ReadByte; -} - -#define RC_INIT_VAR UInt32 range = rd->Range; UInt32 code = rd->Code; -#define RC_FLUSH_VAR rd->Range = range; rd->Code = code; -#define RC_NORMALIZE if (range < kTopValue) { range <<= 8; code = (code << 8) | ReadByte; } - -UInt32 RangeDecoderDecodeDirectBits(CRangeDecoder *rd, int numTotalBits) -{ - RC_INIT_VAR - UInt32 result = 0; - int i; - for (i = numTotalBits; i != 0; i--) - { - /* UInt32 t; */ - range >>= 1; - - result <<= 1; - if (code >= range) - { - code -= range; - result |= 1; - } - /* - t = (code - range) >> 31; - t &= 1; - code -= range & (t - 1); - result = (result + result) | (1 - t); - */ - RC_NORMALIZE - } - RC_FLUSH_VAR - return result; -} - -int RangeDecoderBitDecode(CProb *prob, CRangeDecoder *rd) -{ - UInt32 bound = (rd->Range >> kNumBitModelTotalBits) * *prob; - if (rd->Code < bound) - { - rd->Range = bound; - *prob += (kBitModelTotal - *prob) >> kNumMoveBits; - if (rd->Range < kTopValue) - { - rd->Code = (rd->Code << 8) | ReadByte; - rd->Range <<= 8; - } - return 0; - } - else - { - rd->Range -= bound; - rd->Code -= bound; - *prob -= (*prob) >> kNumMoveBits; - if (rd->Range < kTopValue) - { - rd->Code = (rd->Code << 8) | ReadByte; - rd->Range <<= 8; - } - return 1; - } -} - -#define RC_GET_BIT2(prob, mi, A0, A1) \ - UInt32 bound = (range >> kNumBitModelTotalBits) * *prob; \ - if (code < bound) \ - { A0; range = bound; *prob += (kBitModelTotal - *prob) >> kNumMoveBits; mi <<= 1; } \ - else \ - { A1; range -= bound; code -= bound; *prob -= (*prob) >> kNumMoveBits; mi = (mi + mi) + 1; } \ - RC_NORMALIZE - -#define RC_GET_BIT(prob, mi) RC_GET_BIT2(prob, mi, ; , ;) - -int RangeDecoderBitTreeDecode(CProb *probs, int numLevels, CRangeDecoder *rd) -{ - int mi = 1; - int i; - #ifdef _LZMA_LOC_OPT - RC_INIT_VAR - #endif - for(i = numLevels; i != 0; i--) - { - #ifdef _LZMA_LOC_OPT - CProb *prob = probs + mi; - RC_GET_BIT(prob, mi) - #else - mi = (mi + mi) + RangeDecoderBitDecode(probs + mi, rd); - #endif - } - #ifdef _LZMA_LOC_OPT - RC_FLUSH_VAR - #endif - return mi - (1 << numLevels); -} - -int RangeDecoderReverseBitTreeDecode(CProb *probs, int numLevels, CRangeDecoder *rd) -{ - int mi = 1; - int i; - int symbol = 0; - #ifdef _LZMA_LOC_OPT - RC_INIT_VAR - #endif - for(i = 0; i < numLevels; i++) - { - #ifdef _LZMA_LOC_OPT - CProb *prob = probs + mi; - RC_GET_BIT2(prob, mi, ; , symbol |= (1 << i)) - #else - int bit = RangeDecoderBitDecode(probs + mi, rd); - mi = mi + mi + bit; - symbol |= (bit << i); - #endif - } - #ifdef _LZMA_LOC_OPT - RC_FLUSH_VAR - #endif - return symbol; -} - -Byte LzmaLiteralDecode(CProb *probs, CRangeDecoder *rd) -{ - int symbol = 1; - #ifdef _LZMA_LOC_OPT - RC_INIT_VAR - #endif - do - { - #ifdef _LZMA_LOC_OPT - CProb *prob = probs + symbol; - RC_GET_BIT(prob, symbol) - #else - symbol = (symbol + symbol) | RangeDecoderBitDecode(probs + symbol, rd); - #endif - } - while (symbol < 0x100); - #ifdef _LZMA_LOC_OPT - RC_FLUSH_VAR - #endif - return symbol; -} - -Byte LzmaLiteralDecodeMatch(CProb *probs, CRangeDecoder *rd, Byte matchByte) -{ - int symbol = 1; - #ifdef _LZMA_LOC_OPT - RC_INIT_VAR - #endif - do - { - int bit; - int matchBit = (matchByte >> 7) & 1; - matchByte <<= 1; - #ifdef _LZMA_LOC_OPT - { - CProb *prob = probs + 0x100 + (matchBit << 8) + symbol; - RC_GET_BIT2(prob, symbol, bit = 0, bit = 1) - } - #else - bit = RangeDecoderBitDecode(probs + 0x100 + (matchBit << 8) + symbol, rd); - symbol = (symbol << 1) | bit; - #endif - if (matchBit != bit) - { - while (symbol < 0x100) - { - #ifdef _LZMA_LOC_OPT - CProb *prob = probs + symbol; - RC_GET_BIT(prob, symbol) - #else - symbol = (symbol + symbol) | RangeDecoderBitDecode(probs + symbol, rd); - #endif - } - break; - } - } - while (symbol < 0x100); - #ifdef _LZMA_LOC_OPT - RC_FLUSH_VAR - #endif - return symbol; -} - -#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) - -int LzmaLenDecode(CProb *p, CRangeDecoder *rd, int posState) -{ - if(RangeDecoderBitDecode(p + LenChoice, rd) == 0) - return RangeDecoderBitTreeDecode(p + LenLow + - (posState << kLenNumLowBits), kLenNumLowBits, rd); - if(RangeDecoderBitDecode(p + LenChoice2, rd) == 0) - return kLenNumLowSymbols + RangeDecoderBitTreeDecode(p + LenMid + - (posState << kLenNumMidBits), kLenNumMidBits, rd); - return kLenNumLowSymbols + kLenNumMidSymbols + - RangeDecoderBitTreeDecode(p + LenHigh, kLenNumHighBits, rd); -} - -#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 - -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; - */ - } - - #ifdef _LZMA_OUT_READ - { - 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; - } - #endif - return LZMA_RESULT_OK; -} - -#define kLzmaStreamWasFinishedId (-1) - -int LzmaDecode(CLzmaDecoderState *vs, - #ifdef _LZMA_IN_CB - ILzmaInCallback *InCallback, - #else - const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed, - #endif - unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed) -{ - CProb *p = vs->Probs; - SizeT nowPos = 0; - Byte previousByte = 0; - UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1; - UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1; - int lc = vs->Properties.lc; - CRangeDecoder rd; - - #ifdef _LZMA_OUT_READ - - int state = vs->State; - UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3]; - int len = vs->RemainLen; - UInt32 globalPos = vs->GlobalPos; - UInt32 distanceLimit = vs->DistanceLimit; - - Byte *dictionary = vs->Dictionary; - UInt32 dictionarySize = vs->Properties.DictionarySize; - UInt32 dictionaryPos = vs->DictionaryPos; - - Byte tempDictionary[4]; - - rd.Range = vs->Range; - rd.Code = vs->Code; - #ifdef _LZMA_IN_CB - rd.InCallback = InCallback; - rd.Buffer = vs->Buffer; - rd.BufferLim = vs->BufferLim; - #else - rd.Buffer = inStream; - rd.BufferLim = inStream + inSize; - #endif - - #ifndef _LZMA_IN_CB - *inSizeProcessed = 0; - #endif - *outSizeProcessed = 0; - if (len == kLzmaStreamWasFinishedId) - return LZMA_RESULT_OK; - - if (dictionarySize == 0) - { - dictionary = tempDictionary; - dictionarySize = 1; - tempDictionary[0] = vs->TempDictionary[0]; - } - - if (len == kLzmaNeedInitId) - { - { - 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; - RangeDecoderInit(&rd - #ifndef _LZMA_IN_CB - , inStream, inSize - #endif - ); - #ifdef _LZMA_IN_CB - if (rd.Result != LZMA_RESULT_OK) - return rd.Result; - #endif - if (rd.ExtraBytes != 0) - return LZMA_RESULT_DATA_ERROR; - } - 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]; - - #ifdef _LZMA_IN_CB - rd.Result = LZMA_RESULT_OK; - #endif - rd.ExtraBytes = 0; - - #else /* if !_LZMA_OUT_READ */ - - int state = 0; - UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1; - int len = 0; - - #ifndef _LZMA_IN_CB - *inSizeProcessed = 0; - #endif - *outSizeProcessed = 0; - - { - UInt32 i; - UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp)); - for (i = 0; i < numProbs; i++) - p[i] = kBitModelTotal >> 1; - } - - #ifdef _LZMA_IN_CB - rd.InCallback = InCallback; - #endif - RangeDecoderInit(&rd - #ifndef _LZMA_IN_CB - , inStream, inSize - #endif - ); - - #ifdef _LZMA_IN_CB - if (rd.Result != LZMA_RESULT_OK) - return rd.Result; - #endif - if (rd.ExtraBytes != 0) - return LZMA_RESULT_DATA_ERROR; - - #endif /* _LZMA_OUT_READ */ - - - while(nowPos < outSize) - { - int posState = (int)( - (nowPos - #ifdef _LZMA_OUT_READ - + globalPos - #endif - ) - & posStateMask); - #ifdef _LZMA_IN_CB - if (rd.Result != LZMA_RESULT_OK) - return rd.Result; - #endif - if (rd.ExtraBytes != 0) - return LZMA_RESULT_DATA_ERROR; - if (RangeDecoderBitDecode(p + IsMatch + (state << kNumPosBitsMax) + posState, &rd) == 0) - { - CProb *probs = p + Literal + (LZMA_LIT_SIZE * - ((( - (nowPos - #ifdef _LZMA_OUT_READ - + globalPos - #endif - ) - & literalPosMask) << lc) + (previousByte >> (8 - lc)))); - - if (state >= kNumLitStates) - { - Byte matchByte; - #ifdef _LZMA_OUT_READ - UInt32 pos = dictionaryPos - rep0; - if (pos >= dictionarySize) - pos += dictionarySize; - matchByte = dictionary[pos]; - #else - matchByte = outStream[nowPos - rep0]; - #endif - previousByte = LzmaLiteralDecodeMatch(probs, &rd, matchByte); - } - else - previousByte = LzmaLiteralDecode(probs, &rd); - outStream[nowPos++] = previousByte; - #ifdef _LZMA_OUT_READ - if (distanceLimit < dictionarySize) - distanceLimit++; - - dictionary[dictionaryPos] = previousByte; - if (++dictionaryPos == dictionarySize) - dictionaryPos = 0; - #endif - if (state < 4) state = 0; - else if (state < 10) state -= 3; - else state -= 6; - } - else - { - if (RangeDecoderBitDecode(p + IsRep + state, &rd) == 1) - { - if (RangeDecoderBitDecode(p + IsRepG0 + state, &rd) == 0) - { - if (RangeDecoderBitDecode(p + IsRep0Long + (state << kNumPosBitsMax) + posState, &rd) == 0) - { - #ifdef _LZMA_OUT_READ - UInt32 pos; - #endif - - #ifdef _LZMA_OUT_READ - if (distanceLimit == 0) - #else - if (nowPos == 0) - #endif - return LZMA_RESULT_DATA_ERROR; - - state = state < 7 ? 9 : 11; - #ifdef _LZMA_OUT_READ - pos = dictionaryPos - rep0; - if (pos >= dictionarySize) - pos += dictionarySize; - previousByte = dictionary[pos]; - dictionary[dictionaryPos] = previousByte; - if (++dictionaryPos == dictionarySize) - dictionaryPos = 0; - #else - previousByte = outStream[nowPos - rep0]; - #endif - outStream[nowPos++] = previousByte; - - #ifdef _LZMA_OUT_READ - if (distanceLimit < dictionarySize) - distanceLimit++; - #endif - continue; - } - } - else - { - UInt32 distance; - if(RangeDecoderBitDecode(p + IsRepG1 + state, &rd) == 0) - distance = rep1; - else - { - if(RangeDecoderBitDecode(p + IsRepG2 + state, &rd) == 0) - distance = rep2; - else - { - distance = rep3; - rep3 = rep2; - } - rep2 = rep1; - } - rep1 = rep0; - rep0 = distance; - } - len = LzmaLenDecode(p + RepLenCoder, &rd, posState); - state = state < 7 ? 8 : 11; - } - else - { - int posSlot; - rep3 = rep2; - rep2 = rep1; - rep1 = rep0; - state = state < 7 ? 7 : 10; - len = LzmaLenDecode(p + LenCoder, &rd, posState); - posSlot = RangeDecoderBitTreeDecode(p + PosSlot + - ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) << - kNumPosSlotBits), kNumPosSlotBits, &rd); - if (posSlot >= kStartPosModelIndex) - { - int numDirectBits = ((posSlot >> 1) - 1); - rep0 = ((2 | ((UInt32)posSlot & 1)) << numDirectBits); - if (posSlot < kEndPosModelIndex) - { - rep0 += RangeDecoderReverseBitTreeDecode( - p + SpecPos + rep0 - posSlot - 1, numDirectBits, &rd); - } - else - { - rep0 += RangeDecoderDecodeDirectBits(&rd, - numDirectBits - kNumAlignBits) << kNumAlignBits; - rep0 += RangeDecoderReverseBitTreeDecode(p + Align, kNumAlignBits, &rd); - } - } - else - rep0 = posSlot; - if (++rep0 == (UInt32)(0)) - { - /* it's for stream version */ - len = kLzmaStreamWasFinishedId; - break; - } - } - - len += kMatchMinLen; - #ifdef _LZMA_OUT_READ - if (rep0 > distanceLimit) - #else - if (rep0 > nowPos) - #endif - return LZMA_RESULT_DATA_ERROR; - - #ifdef _LZMA_OUT_READ - if (dictionarySize - distanceLimit > (UInt32)len) - distanceLimit += len; - else - distanceLimit = dictionarySize; - #endif - - do - { - #ifdef _LZMA_OUT_READ - UInt32 pos = dictionaryPos - rep0; - if (pos >= dictionarySize) - pos += dictionarySize; - previousByte = dictionary[pos]; - dictionary[dictionaryPos] = previousByte; - if (++dictionaryPos == dictionarySize) - dictionaryPos = 0; - #else - previousByte = outStream[nowPos - rep0]; - #endif - len--; - outStream[nowPos++] = previousByte; - } - while(len != 0 && nowPos < outSize); - } - } - - - #ifdef _LZMA_OUT_READ - vs->Range = rd.Range; - vs->Code = rd.Code; - vs->DictionaryPos = dictionaryPos; - vs->GlobalPos = globalPos + (UInt32)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]; - #endif - - #ifdef _LZMA_IN_CB - vs->Buffer = rd.Buffer; - vs->BufferLim = rd.BufferLim; - #else - *inSizeProcessed = (SizeT)(rd.Buffer - inStream); - #endif - *outSizeProcessed = nowPos; - return LZMA_RESULT_OK; -}