LzmaDec.cc File Reference

#include "LzmaDec.h"
#include <string.h>

Go to the source code of this file.

Macros
#define	Align   (SpecPos + kNumFullDistances - kEndPosModelIndex)
#define	GET_BIT(p, i)   GET_BIT2(p, i, ; , ;)
#define	GET_BIT2(p, i, A0, A1)
#define	GET_BIT2_CHECK(p, i, A0, A1)
#define	GET_BIT_CHECK(p, i)   GET_BIT2_CHECK(p, i, ; , ;)
#define	IF_BIT_0(p)   ttt = *(p); NORMALIZE; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
#define	IF_BIT_0_CHECK(p)   ttt = *(p); NORMALIZE_CHECK; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
#define	IsMatch   0
#define	IsRep   (IsMatch + (kNumStates << kNumPosBitsMax))
#define	IsRep0Long   (IsRepG2 + kNumStates)
#define	IsRepG0   (IsRep + kNumStates)
#define	IsRepG1   (IsRepG0 + kNumStates)
#define	IsRepG2   (IsRepG1 + kNumStates)
#define	kAlignTableSize   (1 << kNumAlignBits)
#define	kBitModelTotal   (1 << kNumBitModelTotalBits)
#define	kEndPosModelIndex   14
#define	kLenNumHighBits   8
#define	kLenNumHighSymbols   (1 << kLenNumHighBits)
#define	kLenNumLowBits   3
#define	kLenNumLowSymbols   (1 << kLenNumLowBits)
#define	kLenNumMidBits   3
#define	kLenNumMidSymbols   (1 << kLenNumMidBits)
#define	kMatchMinLen   2
#define	kMatchSpecLenStart   (kMatchMinLen + kLenNumLowSymbols + kLenNumMidSymbols + kLenNumHighSymbols)
#define	kNumAlignBits   4
#define	kNumBitModelTotalBits   11
#define	kNumFullDistances   (1 << (kEndPosModelIndex >> 1))
#define	kNumLenProbs   (LenHigh + kLenNumHighSymbols)
#define	kNumLenToPosStates   4
#define	kNumLitStates   7
#define	kNumMoveBits   5
#define	kNumPosBitsMax   4
#define	kNumPosSlotBits   6
#define	kNumPosStatesMax   (1 << kNumPosBitsMax)
#define	kNumStates   12
#define	kNumTopBits   24
#define	kStartPosModelIndex   4
#define	kTopValue   ((UInt32)1 << kNumTopBits)
#define	LenChoice   0
#define	LenChoice2   (LenChoice + 1)
#define	LenCoder   (Align + kAlignTableSize)
#define	LenHigh   (LenMid + (kNumPosStatesMax << kLenNumMidBits))
#define	LenLow   (LenChoice2 + 1)
#define	LenMid   (LenLow + (kNumPosStatesMax << kLenNumLowBits))
#define	Literal   (RepLenCoder + kNumLenProbs)
#define	LZMA_BASE_SIZE   1846
#define	LZMA_DIC_MIN   (1 << 12)
#define	LZMA_LIT_SIZE   768
#define	LzmaProps_GetNumProbs(p)   ((UInt32)LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((p)->lc + (p)->lp)))
#define	NORMALIZE   if (range < kTopValue) { range <<= 8; code = (code << 8) | (*buf++); }
#define	NORMALIZE_CHECK   if (range < kTopValue) { if (buf >= bufLimit) return DUMMY_ERROR; range <<= 8; code = (code << 8) | (*buf++); }
#define	PosSlot   (IsRep0Long + (kNumStates << kNumPosBitsMax))
#define	RC_INIT_SIZE   5
#define	RepLenCoder   (LenCoder + kNumLenProbs)
#define	SpecPos   (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
#define	TREE_6_DECODE(probs, i)
#define	TREE_DECODE(probs, limit, i)   { i = 1; do { TREE_GET_BIT(probs, i); } while (i < limit); i -= limit; }
#define	TREE_DECODE_CHECK(probs, limit, i)   { i = 1; do { GET_BIT_CHECK(probs + i, i) } while (i < limit); i -= limit; }
#define	TREE_GET_BIT(probs, i)   { GET_BIT((probs + i), i); }
#define	UPDATE_0(p)   range = bound; *(p) = (CLzmaProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));
#define	UPDATE_0_CHECK   range = bound;
#define	UPDATE_1(p)   range -= bound; code -= bound; *(p) = (CLzmaProb)(ttt - (ttt >> kNumMoveBits));
#define	UPDATE_1_CHECK   range -= bound; code -= bound;

Enumerations
enum	ELzmaDummy { DUMMY_ERROR, DUMMY_LIT, DUMMY_MATCH, DUMMY_REP }

Functions
SRes	LzmaDec_Allocate (CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
SRes	LzmaDec_AllocateProbs (CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
static SRes	LzmaDec_AllocateProbs2 (CLzmaDec *p, const CLzmaProps *propNew, ISzAlloc *alloc)
static int MY_FAST_CALL	LzmaDec_DecodeReal (CLzmaDec *p, SizeT limit, const Byte *bufLimit)
static int MY_FAST_CALL	LzmaDec_DecodeReal2 (CLzmaDec *p, SizeT limit, const Byte *bufLimit)
SRes	LzmaDec_DecodeToBuf (CLzmaDec *p, Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
SRes	LzmaDec_DecodeToDic (CLzmaDec *p, SizeT dicLimit, const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
void	LzmaDec_Free (CLzmaDec *p, ISzAlloc *alloc)
static void	LzmaDec_FreeDict (CLzmaDec *p, ISzAlloc *alloc)
void	LzmaDec_FreeProbs (CLzmaDec *p, ISzAlloc *alloc)
void	LzmaDec_Init (CLzmaDec *p)
void	LzmaDec_InitDicAndState (CLzmaDec *p, Bool initDic, Bool initState)
static void	LzmaDec_InitRc (CLzmaDec *p, const Byte *data)
static void	LzmaDec_InitStateReal (CLzmaDec *p)
static ELzmaDummy	LzmaDec_TryDummy (const CLzmaDec *p, const Byte *buf, SizeT inSize)
static void MY_FAST_CALL	LzmaDec_WriteRem (CLzmaDec *p, SizeT limit)
SRes	LzmaDecode (Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, const Byte *propData, unsigned propSize, ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAlloc *alloc)
SRes	LzmaProps_Decode (CLzmaProps *p, const Byte *data, unsigned size)

Macro Definition Documentation

#define Align   (SpecPos + kNumFullDistances - kEndPosModelIndex)

Definition at line 102 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define GET_BIT	(		p,
			i
	)		GET_BIT2(p, i, ; , ;)

Definition at line 25 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define GET_BIT2	(		p,
			i,
			A0,
			A1
	)

Value:

IF_BIT_0(p) \
  { UPDATE_0(p); i = (i + i); A0; } else \
  { UPDATE_1(p); i = (i + i) + 1; A1; }

Definition at line 22 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define GET_BIT2_CHECK	(		p,
			i,
			A0,
			A1
	)

Value:

IF_BIT_0_CHECK(p) \
  { UPDATE_0_CHECK; i = (i + i); A0; } else \
  { UPDATE_1_CHECK; i = (i + i) + 1; A1; }

Definition at line 52 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define GET_BIT_CHECK	(		p,
			i
	)		GET_BIT2_CHECK(p, i, ; , ;)

Definition at line 55 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define IF_BIT_0

(

p

)

ttt = *(p); NORMALIZE; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)

Definition at line 19 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define IF_BIT_0_CHECK

(

p

)

ttt = *(p); NORMALIZE_CHECK; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)

Definition at line 49 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define IsMatch   0

Definition at line 94 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define IsRep   (IsMatch + (kNumStates << kNumPosBitsMax))

Definition at line 95 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define IsRep0Long   (IsRepG2 + kNumStates)

Definition at line 99 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define IsRepG0   (IsRep + kNumStates)

Definition at line 96 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define IsRepG1   (IsRepG0 + kNumStates)

Definition at line 97 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define IsRepG2   (IsRepG1 + kNumStates)

Definition at line 98 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kAlignTableSize   (1 << kNumAlignBits)

Definition at line 89 of file LzmaDec.cc.

#define kBitModelTotal   (1 << kNumBitModelTotalBits)

Definition at line 12 of file LzmaDec.cc.

Referenced by LzmaDec_InitStateReal().

#define kEndPosModelIndex   14

Definition at line 82 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kLenNumHighBits   8

Definition at line 67 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kLenNumHighSymbols   (1 << kLenNumHighBits)

Definition at line 68 of file LzmaDec.cc.

#define kLenNumLowBits   3

Definition at line 63 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kLenNumLowSymbols   (1 << kLenNumLowBits)

Definition at line 64 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kLenNumMidBits   3

Definition at line 65 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kLenNumMidSymbols   (1 << kLenNumMidBits)

Definition at line 66 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kMatchMinLen   2

Definition at line 91 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define kMatchSpecLenStart   (kMatchMinLen + kLenNumLowSymbols + kLenNumMidSymbols + kLenNumHighSymbols)

Definition at line 92 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), LzmaDec_DecodeReal2(), LzmaDec_DecodeToDic(), and LzmaDec_WriteRem().

#define kNumAlignBits   4

Definition at line 88 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumBitModelTotalBits   11

Definition at line 11 of file LzmaDec.cc.

#define kNumFullDistances   (1 << (kEndPosModelIndex >> 1))

Definition at line 83 of file LzmaDec.cc.

#define kNumLenProbs   (LenHigh + kLenNumHighSymbols)

Definition at line 75 of file LzmaDec.cc.

#define kNumLenToPosStates   4

Definition at line 86 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumLitStates   7

Definition at line 79 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumMoveBits   5

Definition at line 13 of file LzmaDec.cc.

#define kNumPosBitsMax   4

Definition at line 60 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumPosSlotBits   6

Definition at line 85 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumPosStatesMax   (1 << kNumPosBitsMax)

Definition at line 61 of file LzmaDec.cc.

#define kNumStates   12

Definition at line 78 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kNumTopBits   24

Definition at line 8 of file LzmaDec.cc.

#define kStartPosModelIndex   4

Definition at line 81 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define kTopValue   ((UInt32)1 << kNumTopBits)

Definition at line 9 of file LzmaDec.cc.

#define LenChoice   0

Definition at line 70 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define LenChoice2   (LenChoice + 1)

Definition at line 71 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define LenCoder   (Align + kAlignTableSize)

Definition at line 103 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define LenHigh   (LenMid + (kNumPosStatesMax << kLenNumMidBits))

Definition at line 74 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define LenLow   (LenChoice2 + 1)

Definition at line 72 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define LenMid   (LenLow + (kNumPosStatesMax << kLenNumLowBits))

Definition at line 73 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define Literal   (RepLenCoder + kNumLenProbs)

Definition at line 105 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), LzmaDec_InitStateReal(), and LzmaDec_TryDummy().

#define LZMA_BASE_SIZE   1846

Definition at line 107 of file LzmaDec.cc.

#define LZMA_DIC_MIN   (1 << 12)

Definition at line 116 of file LzmaDec.cc.

Referenced by LzmaProps_Decode().

#define LZMA_LIT_SIZE   768

Definition at line 108 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), LzmaDec_InitStateReal(), and LzmaDec_TryDummy().

#define LzmaProps_GetNumProbs

(

p

)

((UInt32)LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((p)->lc + (p)->lp)))

Definition at line 110 of file LzmaDec.cc.

Referenced by LzmaDec_AllocateProbs2().

#define NORMALIZE   if (range < kTopValue) { range <<= 8; code = (code << 8) | (*buf++); }

Definition at line 17 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define NORMALIZE_CHECK   if (range < kTopValue) { if (buf >= bufLimit) return DUMMY_ERROR; range <<= 8; code = (code << 8) | (*buf++); }

Definition at line 47 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define PosSlot   (IsRep0Long + (kNumStates << kNumPosBitsMax))

Definition at line 100 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define RC_INIT_SIZE   5

Definition at line 15 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeToDic(), and LzmaDecode().

#define RepLenCoder   (LenCoder + kNumLenProbs)

Definition at line 104 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define SpecPos   (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))

Definition at line 101 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal(), and LzmaDec_TryDummy().

#define TREE_6_DECODE	(		probs,
			i
	)

Value:

{ i = 1; \
  TREE_GET_BIT(probs, i); \
  TREE_GET_BIT(probs, i); \
  TREE_GET_BIT(probs, i); \
  TREE_GET_BIT(probs, i); \
  TREE_GET_BIT(probs, i); \
  TREE_GET_BIT(probs, i); \
  i -= 0x40; }

Definition at line 36 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define TREE_DECODE	(		probs,
			limit,
			i
	)		{ i = 1; do { TREE_GET_BIT(probs, i); } while (i < limit); i -= limit; }

Definition at line 28 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define TREE_DECODE_CHECK	(		probs,
			limit,
			i
	)		{ i = 1; do { GET_BIT_CHECK(probs + i, i) } while (i < limit); i -= limit; }

Definition at line 56 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define TREE_GET_BIT	(		probs,
			i
	)		{ GET_BIT((probs + i), i); }

Definition at line 27 of file LzmaDec.cc.

#define UPDATE_0

(

p

)

range = bound; *(p) = (CLzmaProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));

Definition at line 20 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define UPDATE_0_CHECK   range = bound;

Definition at line 50 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

#define UPDATE_1

(

p

)

range -= bound; code -= bound; *(p) = (CLzmaProb)(ttt - (ttt >> kNumMoveBits));

Definition at line 21 of file LzmaDec.cc.

Referenced by LzmaDec_DecodeReal().

#define UPDATE_1_CHECK   range -= bound; code -= bound;

Definition at line 51 of file LzmaDec.cc.

Referenced by LzmaDec_TryDummy().

Enumeration Type Documentation

enum ELzmaDummy

Enumerator
DUMMY_ERROR
DUMMY_LIT
DUMMY_MATCH
DUMMY_REP

Definition at line 479 of file LzmaDec.cc.

{
  DUMMY_ERROR, /* unexpected end of input stream */
  DUMMY_LIT,
  DUMMY_MATCH,
  DUMMY_REP
} ELzmaDummy;

Function Documentation

SRes LzmaDec_Allocate	(	CLzmaDec *	p,
		const Byte *	props,
		unsigned	propsSize,
		ISzAlloc *	alloc
	)

Definition at line 947 of file LzmaDec.cc.

References ISzAlloc::Alloc, CLzmaDec::dic, CLzmaDec::dicBufSize, _CLzmaProps::dicSize, LzmaDec_AllocateProbs2(), LzmaDec_FreeDict(), LzmaDec_FreeProbs(), LzmaProps_Decode(), CLzmaDec::prop, RINOK, SZ_ERROR_MEM, and SZ_OK.

Referenced by LzmaFile::Open().

{
  CLzmaProps propNew;
  SizeT dicBufSize;
  RINOK(LzmaProps_Decode(&propNew, props, propsSize));
  RINOK(LzmaDec_AllocateProbs2(p, &propNew, alloc));
  dicBufSize = propNew.dicSize;
  if (p->dic == 0 || dicBufSize != p->dicBufSize)
  {
    LzmaDec_FreeDict(p, alloc);
    p->dic = (Byte *)alloc->Alloc(alloc, dicBufSize);
    if (p->dic == 0)
    {
      LzmaDec_FreeProbs(p, alloc);
      return SZ_ERROR_MEM;
    }
  }
  p->dicBufSize = dicBufSize;
  p->prop = propNew;
  return SZ_OK;
}

SRes LzmaDec_AllocateProbs	(	CLzmaDec *	p,
		const Byte *	props,
		unsigned	propsSize,
		ISzAlloc *	alloc
	)

Definition at line 938 of file LzmaDec.cc.

References LzmaDec_AllocateProbs2(), LzmaProps_Decode(), CLzmaDec::prop, RINOK, and SZ_OK.

Referenced by LzmaDecode().

{
  CLzmaProps propNew;
  RINOK(LzmaProps_Decode(&propNew, props, propsSize));
  RINOK(LzmaDec_AllocateProbs2(p, &propNew, alloc));
  p->prop = propNew;
  return SZ_OK;
}

static SRes LzmaDec_AllocateProbs2 ( CLzmaDec *  p, const CLzmaProps *  propNew, ISzAlloc *  alloc  )

static

Definition at line 924 of file LzmaDec.cc.

References ISzAlloc::Alloc, CLzmaProb, LzmaDec_FreeProbs(), LzmaProps_GetNumProbs, CLzmaDec::numProbs, CLzmaDec::probs, SZ_ERROR_MEM, and SZ_OK.

Referenced by LzmaDec_Allocate(), and LzmaDec_AllocateProbs().

{
  UInt32 numProbs = LzmaProps_GetNumProbs(propNew);
  if (p->probs == 0 || numProbs != p->numProbs)
  {
    LzmaDec_FreeProbs(p, alloc);
    p->probs = (CLzmaProb *)alloc->Alloc(alloc, numProbs * sizeof(CLzmaProb));
    p->numProbs = numProbs;
    if (p->probs == 0)
      return SZ_ERROR_MEM;
  }
  return SZ_OK;
}

static int MY_FAST_CALL LzmaDec_DecodeReal ( CLzmaDec *  p, SizeT  limit, const Byte *  bufLimit  )

static

Definition at line 131 of file LzmaDec.cc.

References Align, CLzmaDec::buf, CLzmaDec::checkDicSize, CLzmaProb, CLzmaDec::code, alignCSCRings::dest, CLzmaDec::dic, CLzmaDec::dicBufSize, CLzmaDec::dicPos, GET_BIT, GET_BIT2, i, IF_BIT_0, IsMatch, IsRep, IsRep0Long, IsRepG0, IsRepG1, IsRepG2, kEndPosModelIndex, kLenNumHighBits, kLenNumLowBits, kLenNumLowSymbols, kLenNumMidBits, kLenNumMidSymbols, kMatchMinLen, kMatchSpecLenStart, kNumAlignBits, kNumLenToPosStates, kNumLitStates, kNumPosBitsMax, kNumPosSlotBits, kNumStates, kStartPosModelIndex, _CLzmaProps::lc, LenChoice, LenChoice2, LenCoder, LenHigh, LenLow, LenMid, MessageLogger_cff::limit, Literal, _CLzmaProps::lp, LZMA_LIT_SIZE, NORMALIZE, evf::evtn::offset(), _CLzmaProps::pb, PosSlot, mix_2012_Summer_inTimeOnly_cff::prob, CLzmaDec::probs, CLzmaDec::processedPos, CLzmaDec::prop, CLzmaDec::range, CLzmaDec::remainLen, RepLenCoder, CLzmaDec::reps, SpecPos, alcazmumu_cfi::src, CLzmaDec::state, SZ_ERROR_DATA, SZ_OK, edmStreamStallGrapher::t, TREE_6_DECODE, TREE_DECODE, UPDATE_0, and UPDATE_1.

Referenced by LzmaDec_DecodeReal2().

{
  CLzmaProb *probs = p->probs;

  unsigned state = p->state;
  UInt32 rep0 = p->reps[0], rep1 = p->reps[1], rep2 = p->reps[2], rep3 = p->reps[3];
  unsigned pbMask = ((unsigned)1 << (p->prop.pb)) - 1;
  unsigned lpMask = ((unsigned)1 << (p->prop.lp)) - 1;
  unsigned lc = p->prop.lc;

  Byte *dic = p->dic;
  SizeT dicBufSize = p->dicBufSize;
  SizeT dicPos = p->dicPos;
  
  UInt32 processedPos = p->processedPos;
  UInt32 checkDicSize = p->checkDicSize;
  unsigned len = 0;

  const Byte *buf = p->buf;
  UInt32 range = p->range;
  UInt32 code = p->code;

  do
  {
    CLzmaProb *prob;
    UInt32 bound;
    unsigned ttt;
    unsigned posState = processedPos & pbMask;

    prob = probs + IsMatch + (state << kNumPosBitsMax) + posState;
    IF_BIT_0(prob)
    {
      unsigned symbol;
      UPDATE_0(prob);
      prob = probs + Literal;
      if (checkDicSize != 0 || processedPos != 0)
        prob += (LZMA_LIT_SIZE * (((processedPos & lpMask) << lc) +
        (dic[(dicPos == 0 ? dicBufSize : dicPos) - 1] >> (8 - lc))));

      if (state < kNumLitStates)
      {
        state -= (state < 4) ? state : 3;
        symbol = 1;
        do { GET_BIT(prob + symbol, symbol) } while (symbol < 0x100);
      }
      else
      {
        unsigned matchByte = p->dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
        unsigned offs = 0x100;
        state -= (state < 10) ? 3 : 6;
        symbol = 1;
        do
        {
          unsigned bit;
          CLzmaProb *probLit;
          matchByte <<= 1;
          bit = (matchByte & offs);
          probLit = prob + offs + bit + symbol;
          GET_BIT2(probLit, symbol, offs &= ~bit, offs &= bit)
        }
        while (symbol < 0x100);
      }
      dic[dicPos++] = (Byte)symbol;
      processedPos++;
      continue;
    }
    else
    {
      UPDATE_1(prob);
      prob = probs + IsRep + state;
      IF_BIT_0(prob)
      {
        UPDATE_0(prob);
        state += kNumStates;
        prob = probs + LenCoder;
      }
      else
      {
        UPDATE_1(prob);
        if (checkDicSize == 0 && processedPos == 0)
          return SZ_ERROR_DATA;
        prob = probs + IsRepG0 + state;
        IF_BIT_0(prob)
        {
          UPDATE_0(prob);
          prob = probs + IsRep0Long + (state << kNumPosBitsMax) + posState;
          IF_BIT_0(prob)
          {
            UPDATE_0(prob);
            dic[dicPos] = dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
            dicPos++;
            processedPos++;
            state = state < kNumLitStates ? 9 : 11;
            continue;
          }
          UPDATE_1(prob);
        }
        else
        {
          UInt32 distance;
          UPDATE_1(prob);
          prob = probs + IsRepG1 + state;
          IF_BIT_0(prob)
          {
            UPDATE_0(prob);
            distance = rep1;
          }
          else
          {
            UPDATE_1(prob);
            prob = probs + IsRepG2 + state;
            IF_BIT_0(prob)
            {
              UPDATE_0(prob);
              distance = rep2;
            }
            else
            {
              UPDATE_1(prob);
              distance = rep3;
              rep3 = rep2;
            }
            rep2 = rep1;
          }
          rep1 = rep0;
          rep0 = distance;
        }
        state = state < kNumLitStates ? 8 : 11;
        prob = probs + RepLenCoder;
      }
      {
        unsigned limit, offset;
        CLzmaProb *probLen = prob + LenChoice;
        IF_BIT_0(probLen)
        {
          UPDATE_0(probLen);
          probLen = prob + LenLow + (posState << kLenNumLowBits);
          offset = 0;
          limit = (1 << kLenNumLowBits);
        }
        else
        {
          UPDATE_1(probLen);
          probLen = prob + LenChoice2;
          IF_BIT_0(probLen)
          {
            UPDATE_0(probLen);
            probLen = prob + LenMid + (posState << kLenNumMidBits);
            offset = kLenNumLowSymbols;
            limit = (1 << kLenNumMidBits);
          }
          else
          {
            UPDATE_1(probLen);
            probLen = prob + LenHigh;
            offset = kLenNumLowSymbols + kLenNumMidSymbols;
            limit = (1 << kLenNumHighBits);
          }
        }
        TREE_DECODE(probLen, limit, len);
        len += offset;
      }

      if (state >= kNumStates)
      {
        UInt32 distance;
        prob = probs + PosSlot +
            ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) << kNumPosSlotBits);
        TREE_6_DECODE(prob, distance);
        if (distance >= kStartPosModelIndex)
        {
          unsigned posSlot = (unsigned)distance;
          int numDirectBits = (int)(((distance >> 1) - 1));
          distance = (2 | (distance & 1));
          if (posSlot < kEndPosModelIndex)
          {
            distance <<= numDirectBits;
            prob = probs + SpecPos + distance - posSlot - 1;
            {
              UInt32 mask = 1;
              unsigned i = 1;
              do
              {
                GET_BIT2(prob + i, i, ; , distance |= mask);
                mask <<= 1;
              }
              while (--numDirectBits != 0);
            }
          }
          else
          {
            numDirectBits -= kNumAlignBits;
            do
            {
              NORMALIZE
              range >>= 1;
              
              {
                UInt32 t;
                code -= range;
                t = (0 - ((UInt32)code >> 31)); /* (UInt32)((Int32)code >> 31) */
                distance = (distance << 1) + (t + 1);
                code += range & t;
              }
              /*
              distance <<= 1;
              if (code >= range)
              {
                code -= range;
                distance |= 1;
              }
              */
            }
            while (--numDirectBits != 0);
            prob = probs + Align;
            distance <<= kNumAlignBits;
            {
              unsigned i = 1;
              GET_BIT2(prob + i, i, ; , distance |= 1);
              GET_BIT2(prob + i, i, ; , distance |= 2);
              GET_BIT2(prob + i, i, ; , distance |= 4);
              GET_BIT2(prob + i, i, ; , distance |= 8);
            }
            if (distance == (UInt32)0xFFFFFFFF)
            {
              len += kMatchSpecLenStart;
              state -= kNumStates;
              break;
            }
          }
        }
        rep3 = rep2;
        rep2 = rep1;
        rep1 = rep0;
        rep0 = distance + 1;
        if (checkDicSize == 0)
        {
          if (distance >= processedPos)
            return SZ_ERROR_DATA;
        }
        else if (distance >= checkDicSize)
          return SZ_ERROR_DATA;
        state = (state < kNumStates + kNumLitStates) ? kNumLitStates : kNumLitStates + 3;
      }

      len += kMatchMinLen;

      if (limit == dicPos)
        return SZ_ERROR_DATA;
      {
        SizeT rem = limit - dicPos;
        unsigned curLen = ((rem < len) ? (unsigned)rem : len);
        SizeT pos = (dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0);

        processedPos += curLen;

        len -= curLen;
        if (pos + curLen <= dicBufSize)
        {
          Byte *dest = dic + dicPos;
          ptrdiff_t src = (ptrdiff_t)pos - (ptrdiff_t)dicPos;
          const Byte *lim = dest + curLen;
          dicPos += curLen;
          do
            *(dest) = (Byte)*(dest + src);
          while (++dest != lim);
        }
        else
        {
          do
          {
            dic[dicPos++] = dic[pos];
            if (++pos == dicBufSize)
              pos = 0;
          }
          while (--curLen != 0);
        }
      }
    }
  }
  while (dicPos < limit && buf < bufLimit);
  NORMALIZE;
  p->buf = buf;
  p->range = range;
  p->code = code;
  p->remainLen = len;
  p->dicPos = dicPos;
  p->processedPos = processedPos;
  p->reps[0] = rep0;
  p->reps[1] = rep1;
  p->reps[2] = rep2;
  p->reps[3] = rep3;
  p->state = state;

  return SZ_OK;
}

static int MY_FAST_CALL LzmaDec_DecodeReal2 ( CLzmaDec *  p, SizeT  limit, const Byte *  bufLimit  )

static

Definition at line 454 of file LzmaDec.cc.

References CLzmaDec::buf, CLzmaDec::checkDicSize, CLzmaDec::dicPos, _CLzmaProps::dicSize, kMatchSpecLenStart, MessageLogger_cff::limit, LzmaDec_DecodeReal(), LzmaDec_WriteRem(), CLzmaDec::processedPos, CLzmaDec::prop, CLzmaDec::remainLen, and RINOK.

Referenced by LzmaDec_DecodeToDic().

{
  do
  {
    SizeT limit2 = limit;
    if (p->checkDicSize == 0)
    {
      UInt32 rem = p->prop.dicSize - p->processedPos;
      if (limit - p->dicPos > rem)
        limit2 = p->dicPos + rem;
    }
    RINOK(LzmaDec_DecodeReal(p, limit2, bufLimit));
    if (p->processedPos >= p->prop.dicSize)
      p->checkDicSize = p->prop.dicSize;
    LzmaDec_WriteRem(p, limit);
  }
  while (p->dicPos < limit && p->buf < bufLimit && p->remainLen < kMatchSpecLenStart);

  if (p->remainLen > kMatchSpecLenStart)
  {
    p->remainLen = kMatchSpecLenStart;
  }
  return 0;
}

SRes LzmaDec_DecodeToBuf	(	CLzmaDec *	p,
		Byte *	dest,
		SizeT *	destLen,
		const Byte *	src,
		SizeT *	srcLen,
		ELzmaFinishMode	finishMode,
		ELzmaStatus *	status
	)

Definition at line 840 of file LzmaDec.cc.

References CLzmaDec::dic, CLzmaDec::dicBufSize, CLzmaDec::dicPos, LZMA_FINISH_ANY, LzmaDec_DecodeToDic(), and SZ_OK.

Referenced by LzmaFile::DecodeAll(), and LzmaFile::DecodeBuffer().

{
  SizeT outSize = *destLen;
  SizeT inSize = *srcLen;
  *srcLen = *destLen = 0;
  for (;;)
  {
    SizeT inSizeCur = inSize, outSizeCur, dicPos;
    ELzmaFinishMode curFinishMode;
    SRes res;
    if (p->dicPos == p->dicBufSize)
      p->dicPos = 0;
    dicPos = p->dicPos;
    if (outSize > p->dicBufSize - dicPos)
    {
      outSizeCur = p->dicBufSize;
      curFinishMode = LZMA_FINISH_ANY;
    }
    else
    {
      outSizeCur = dicPos + outSize;
      curFinishMode = finishMode;
    }

    res = LzmaDec_DecodeToDic(p, outSizeCur, src, &inSizeCur, curFinishMode, status);
    src += inSizeCur;
    inSize -= inSizeCur;
    *srcLen += inSizeCur;
    outSizeCur = p->dicPos - dicPos;
    memcpy(dest, p->dic + dicPos, outSizeCur);
    dest += outSizeCur;
    outSize -= outSizeCur;
    *destLen += outSizeCur;
    if (res != 0)
      return res;
    if (outSizeCur == 0 || outSize == 0)
      return SZ_OK;
  }
}

SRes LzmaDec_DecodeToDic	(	CLzmaDec *	p,
		SizeT	dicLimit,
		const Byte *	src,
		SizeT *	srcLen,
		ELzmaFinishMode	finishMode,
		ELzmaStatus *	status
	)

Definition at line 719 of file LzmaDec.cc.

References CLzmaDec::buf, CLzmaDec::code, CLzmaDec::dicPos, DUMMY_ERROR, DUMMY_MATCH, reco::if(), kMatchSpecLenStart, LZMA_FINISH_ANY, LZMA_REQUIRED_INPUT_MAX, LZMA_STATUS_FINISHED_WITH_MARK, LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK, LZMA_STATUS_NEEDS_MORE_INPUT, LZMA_STATUS_NOT_FINISHED, LZMA_STATUS_NOT_SPECIFIED, LzmaDec_DecodeReal2(), LzmaDec_InitRc(), LzmaDec_InitStateReal(), LzmaDec_TryDummy(), LzmaDec_WriteRem(), CLzmaDec::needFlush, CLzmaDec::needInitState, RC_INIT_SIZE, CLzmaDec::remainLen, alcazmumu_cfi::src, SZ_ERROR_DATA, SZ_OK, CLzmaDec::tempBuf, and CLzmaDec::tempBufSize.

Referenced by LzmaDec_DecodeToBuf(), and LzmaDecode().

{
  SizeT inSize = *srcLen;
  (*srcLen) = 0;
  LzmaDec_WriteRem(p, dicLimit);
  
  *status = LZMA_STATUS_NOT_SPECIFIED;

  while (p->remainLen != kMatchSpecLenStart)
  {
      int checkEndMarkNow;

      if (p->needFlush != 0)
      {
        for (; inSize > 0 && p->tempBufSize < RC_INIT_SIZE; (*srcLen)++, inSize--)
          p->tempBuf[p->tempBufSize++] = *src++;
        if (p->tempBufSize < RC_INIT_SIZE)
        {
          *status = LZMA_STATUS_NEEDS_MORE_INPUT;
          return SZ_OK;
        }
        if (p->tempBuf[0] != 0)
          return SZ_ERROR_DATA;

        LzmaDec_InitRc(p, p->tempBuf);
        p->tempBufSize = 0;
      }

      checkEndMarkNow = 0;
      if (p->dicPos >= dicLimit)
      {
        if (p->remainLen == 0 && p->code == 0)
        {
          *status = LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK;
          return SZ_OK;
        }
        if (finishMode == LZMA_FINISH_ANY)
        {
          *status = LZMA_STATUS_NOT_FINISHED;
          return SZ_OK;
        }
        if (p->remainLen != 0)
        {
          *status = LZMA_STATUS_NOT_FINISHED;
          return SZ_ERROR_DATA;
        }
        checkEndMarkNow = 1;
      }

      if (p->needInitState)
        LzmaDec_InitStateReal(p);
  
      if (p->tempBufSize == 0)
      {
        SizeT processed;
        const Byte *bufLimit;
        if (inSize < LZMA_REQUIRED_INPUT_MAX || checkEndMarkNow)
        {
          int dummyRes = LzmaDec_TryDummy(p, src, inSize);
          if (dummyRes == DUMMY_ERROR)
          {
            memcpy(p->tempBuf, src, inSize);
            p->tempBufSize = (unsigned)inSize;
            (*srcLen) += inSize;
            *status = LZMA_STATUS_NEEDS_MORE_INPUT;
            return SZ_OK;
          }
          if (checkEndMarkNow && dummyRes != DUMMY_MATCH)
          {
            *status = LZMA_STATUS_NOT_FINISHED;
            return SZ_ERROR_DATA;
          }
          bufLimit = src;
        }
        else
          bufLimit = src + inSize - LZMA_REQUIRED_INPUT_MAX;
        p->buf = src;
        if (LzmaDec_DecodeReal2(p, dicLimit, bufLimit) != 0)
          return SZ_ERROR_DATA;
        processed = (SizeT)(p->buf - src);
        (*srcLen) += processed;
        src += processed;
        inSize -= processed;
      }
      else
      {
        unsigned rem = p->tempBufSize, lookAhead = 0;
        while (rem < LZMA_REQUIRED_INPUT_MAX && lookAhead < inSize)
          p->tempBuf[rem++] = src[lookAhead++];
        p->tempBufSize = rem;
        if (rem < LZMA_REQUIRED_INPUT_MAX || checkEndMarkNow)
        {
          int dummyRes = LzmaDec_TryDummy(p, p->tempBuf, rem);
          if (dummyRes == DUMMY_ERROR)
          {
            (*srcLen) += lookAhead;
            *status = LZMA_STATUS_NEEDS_MORE_INPUT;
            return SZ_OK;
          }
          if (checkEndMarkNow && dummyRes != DUMMY_MATCH)
          {
            *status = LZMA_STATUS_NOT_FINISHED;
            return SZ_ERROR_DATA;
          }
        }
        p->buf = p->tempBuf;
        if (LzmaDec_DecodeReal2(p, dicLimit, p->buf) != 0)
          return SZ_ERROR_DATA;
        lookAhead -= (rem - (unsigned)(p->buf - p->tempBuf));
        (*srcLen) += lookAhead;
        src += lookAhead;
        inSize -= lookAhead;
        p->tempBufSize = 0;
      }
  }
  if (p->code == 0)
    *status = LZMA_STATUS_FINISHED_WITH_MARK;
  return (p->code == 0) ? SZ_OK : SZ_ERROR_DATA;
}

void LzmaDec_Free	(	CLzmaDec *	p,
		ISzAlloc *	alloc
	)

Definition at line 892 of file LzmaDec.cc.

References LzmaDec_FreeDict(), and LzmaDec_FreeProbs().

Referenced by LzmaFile::Close().

{
  LzmaDec_FreeProbs(p, alloc);
  LzmaDec_FreeDict(p, alloc);
}

static void LzmaDec_FreeDict ( CLzmaDec *  p, ISzAlloc *  alloc  )

static

Definition at line 886 of file LzmaDec.cc.

References CLzmaDec::dic, and ISzAlloc::Free.

Referenced by LzmaDec_Allocate(), and LzmaDec_Free().

{
  alloc->Free(alloc, p->dic);
  p->dic = 0;
}

void LzmaDec_FreeProbs	(	CLzmaDec *	p,
		ISzAlloc *	alloc
	)

Definition at line 880 of file LzmaDec.cc.

References ISzAlloc::Free, and CLzmaDec::probs.

Referenced by LzmaDec_Allocate(), LzmaDec_AllocateProbs2(), LzmaDec_Free(), and LzmaDecode().

{
  alloc->Free(alloc, p->probs);
  p->probs = 0;
}

void LzmaDec_Init

(

CLzmaDec *

p

)

Definition at line 701 of file LzmaDec.cc.

References CLzmaDec::dicPos, LzmaDec_InitDicAndState(), and True.

Referenced by LzmaDecode(), and LzmaFile::Open().

{
  p->dicPos = 0;
  LzmaDec_InitDicAndState(p, True, True);
}

void LzmaDec_InitDicAndState	(	CLzmaDec *	p,
		Bool	initDic,
		Bool	initState
	)

Definition at line 685 of file LzmaDec.cc.

References CLzmaDec::checkDicSize, CLzmaDec::needFlush, CLzmaDec::needInitState, CLzmaDec::processedPos, CLzmaDec::remainLen, and CLzmaDec::tempBufSize.

Referenced by LzmaDec_Init().

{
  p->needFlush = 1;
  p->remainLen = 0;
  p->tempBufSize = 0;

  if (initDic)
  {
    p->processedPos = 0;
    p->checkDicSize = 0;
    p->needInitState = 1;
  }
  if (initState)
    p->needInitState = 1;
}

static void LzmaDec_InitRc ( CLzmaDec *  p, const Byte *  data  )

static

Definition at line 678 of file LzmaDec.cc.

References CLzmaDec::code, CLzmaDec::needFlush, and CLzmaDec::range.

Referenced by LzmaDec_DecodeToDic().

{
  p->code = ((UInt32)data[1] << 24) | ((UInt32)data[2] << 16) | ((UInt32)data[3] << 8) | ((UInt32)data[4]);
  p->range = 0xFFFFFFFF;
  p->needFlush = 0;
}

static void LzmaDec_InitStateReal ( CLzmaDec *  p )

static

Definition at line 707 of file LzmaDec.cc.

References CLzmaProb, i, kBitModelTotal, _CLzmaProps::lc, Literal, _CLzmaProps::lp, LZMA_LIT_SIZE, CLzmaDec::needInitState, CLzmaDec::probs, CLzmaDec::prop, CLzmaDec::reps, and CLzmaDec::state.

Referenced by LzmaDec_DecodeToDic().

{
  UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (p->prop.lc + p->prop.lp));
  UInt32 i;
  CLzmaProb *probs = p->probs;
  for (i = 0; i < numProbs; i++)
    probs[i] = kBitModelTotal >> 1;
  p->reps[0] = p->reps[1] = p->reps[2] = p->reps[3] = 1;
  p->state = 0;
  p->needInitState = 0;
}

static ELzmaDummy LzmaDec_TryDummy ( const CLzmaDec *  p, const Byte *  buf, SizeT  inSize  )

static

Definition at line 487 of file LzmaDec.cc.

References Align, CLzmaDec::checkDicSize, CLzmaProb, CLzmaDec::code, CLzmaDec::dic, CLzmaDec::dicBufSize, CLzmaDec::dicPos, DUMMY_LIT, DUMMY_MATCH, DUMMY_REP, GET_BIT2_CHECK, GET_BIT_CHECK, i, IF_BIT_0_CHECK, IsMatch, IsRep, IsRep0Long, IsRepG0, IsRepG1, IsRepG2, kEndPosModelIndex, kLenNumHighBits, kLenNumLowBits, kLenNumLowSymbols, kLenNumMidBits, kLenNumMidSymbols, kNumAlignBits, kNumLenToPosStates, kNumLitStates, kNumPosBitsMax, kNumPosSlotBits, kNumStates, kStartPosModelIndex, _CLzmaProps::lc, LenChoice, LenChoice2, LenCoder, LenHigh, LenLow, LenMid, MessageLogger_cff::limit, Literal, _CLzmaProps::lp, LZMA_LIT_SIZE, NORMALIZE_CHECK, evf::evtn::offset(), _CLzmaProps::pb, PosSlot, mix_2012_Summer_inTimeOnly_cff::prob, CLzmaDec::probs, CLzmaDec::processedPos, CLzmaDec::prop, CLzmaDec::range, RepLenCoder, CLzmaDec::reps, SpecPos, CLzmaDec::state, TREE_DECODE_CHECK, UPDATE_0_CHECK, and UPDATE_1_CHECK.

Referenced by LzmaDec_DecodeToDic().

{
  UInt32 range = p->range;
  UInt32 code = p->code;
  const Byte *bufLimit = buf + inSize;
  CLzmaProb *probs = p->probs;
  unsigned state = p->state;
  ELzmaDummy res;

  {
    CLzmaProb *prob;
    UInt32 bound;
    unsigned ttt;
    unsigned posState = (p->processedPos) & ((1 << p->prop.pb) - 1);

    prob = probs + IsMatch + (state << kNumPosBitsMax) + posState;
    IF_BIT_0_CHECK(prob)
    {
      UPDATE_0_CHECK

      /* if (bufLimit - buf >= 7) return DUMMY_LIT; */

      prob = probs + Literal;
      if (p->checkDicSize != 0 || p->processedPos != 0)
        prob += (LZMA_LIT_SIZE *
          ((((p->processedPos) & ((1 << (p->prop.lp)) - 1)) << p->prop.lc) +
          (p->dic[(p->dicPos == 0 ? p->dicBufSize : p->dicPos) - 1] >> (8 - p->prop.lc))));

      if (state < kNumLitStates)
      {
        unsigned symbol = 1;
        do { GET_BIT_CHECK(prob + symbol, symbol) } while (symbol < 0x100);
      }
      else
      {
        unsigned matchByte = p->dic[p->dicPos - p->reps[0] +
            ((p->dicPos < p->reps[0]) ? p->dicBufSize : 0)];
        unsigned offs = 0x100;
        unsigned symbol = 1;
        do
        {
          unsigned bit;
          CLzmaProb *probLit;
          matchByte <<= 1;
          bit = (matchByte & offs);
          probLit = prob + offs + bit + symbol;
          GET_BIT2_CHECK(probLit, symbol, offs &= ~bit, offs &= bit)
        }
        while (symbol < 0x100);
      }
      res = DUMMY_LIT;
    }
    else
    {
      unsigned len;
      UPDATE_1_CHECK;

      prob = probs + IsRep + state;
      IF_BIT_0_CHECK(prob)
      {
        UPDATE_0_CHECK;
        state = 0;
        prob = probs + LenCoder;
        res = DUMMY_MATCH;
      }
      else
      {
        UPDATE_1_CHECK;
        res = DUMMY_REP;
        prob = probs + IsRepG0 + state;
        IF_BIT_0_CHECK(prob)
        {
          UPDATE_0_CHECK;
          prob = probs + IsRep0Long + (state << kNumPosBitsMax) + posState;
          IF_BIT_0_CHECK(prob)
          {
            UPDATE_0_CHECK;
            NORMALIZE_CHECK;
            return DUMMY_REP;
          }
          else
          {
            UPDATE_1_CHECK;
          }
        }
        else
        {
          UPDATE_1_CHECK;
          prob = probs + IsRepG1 + state;
          IF_BIT_0_CHECK(prob)
          {
            UPDATE_0_CHECK;
          }
          else
          {
            UPDATE_1_CHECK;
            prob = probs + IsRepG2 + state;
            IF_BIT_0_CHECK(prob)
            {
              UPDATE_0_CHECK;
            }
            else
            {
              UPDATE_1_CHECK;
            }
          }
        }
        state = kNumStates;
        prob = probs + RepLenCoder;
      }
      {
        unsigned limit, offset;
        CLzmaProb *probLen = prob + LenChoice;
        IF_BIT_0_CHECK(probLen)
        {
          UPDATE_0_CHECK;
          probLen = prob + LenLow + (posState << kLenNumLowBits);
          offset = 0;
          limit = 1 << kLenNumLowBits;
        }
        else
        {
          UPDATE_1_CHECK;
          probLen = prob + LenChoice2;
          IF_BIT_0_CHECK(probLen)
          {
            UPDATE_0_CHECK;
            probLen = prob + LenMid + (posState << kLenNumMidBits);
            offset = kLenNumLowSymbols;
            limit = 1 << kLenNumMidBits;
          }
          else
          {
            UPDATE_1_CHECK;
            probLen = prob + LenHigh;
            offset = kLenNumLowSymbols + kLenNumMidSymbols;
            limit = 1 << kLenNumHighBits;
          }
        }
        TREE_DECODE_CHECK(probLen, limit, len);
        len += offset;
      }

      if (state < 4)
      {
        unsigned posSlot;
        prob = probs + PosSlot +
            ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
            kNumPosSlotBits);
        TREE_DECODE_CHECK(prob, 1 << kNumPosSlotBits, posSlot);
        if (posSlot >= kStartPosModelIndex)
        {
          int numDirectBits = ((posSlot >> 1) - 1);

          /* if (bufLimit - buf >= 8) return DUMMY_MATCH; */

          if (posSlot < kEndPosModelIndex)
          {
            prob = probs + SpecPos + ((2 | (posSlot & 1)) << numDirectBits) - posSlot - 1;
          }
          else
          {
            numDirectBits -= kNumAlignBits;
            do
            {
              NORMALIZE_CHECK
              range >>= 1;
              code -= range & (((code - range) >> 31) - 1);
              /* if (code >= range) code -= range; */
            }
            while (--numDirectBits != 0);
            prob = probs + Align;
            numDirectBits = kNumAlignBits;
          }
          {
            unsigned i = 1;
            do
            {
              GET_BIT_CHECK(prob + i, i);
            }
            while (--numDirectBits != 0);
          }
        }
      }
    }
  }
  NORMALIZE_CHECK;
  return res;
}

static void MY_FAST_CALL LzmaDec_WriteRem ( CLzmaDec *  p, SizeT  limit  )

static

Definition at line 428 of file LzmaDec.cc.

References CLzmaDec::checkDicSize, CLzmaDec::dic, CLzmaDec::dicBufSize, CLzmaDec::dicPos, _CLzmaProps::dicSize, kMatchSpecLenStart, CLzmaDec::processedPos, CLzmaDec::prop, CLzmaDec::remainLen, and CLzmaDec::reps.

Referenced by LzmaDec_DecodeReal2(), and LzmaDec_DecodeToDic().

{
  if (p->remainLen != 0 && p->remainLen < kMatchSpecLenStart)
  {
    Byte *dic = p->dic;
    SizeT dicPos = p->dicPos;
    SizeT dicBufSize = p->dicBufSize;
    unsigned len = p->remainLen;
    UInt32 rep0 = p->reps[0];
    if (limit - dicPos < len)
      len = (unsigned)(limit - dicPos);

    if (p->checkDicSize == 0 && p->prop.dicSize - p->processedPos <= len)
      p->checkDicSize = p->prop.dicSize;

    p->processedPos += len;
    p->remainLen -= len;
    while (len-- != 0)
    {
      dic[dicPos] = dic[(dicPos - rep0) + ((dicPos < rep0) ? dicBufSize : 0)];
      dicPos++;
    }
    p->dicPos = dicPos;
  }
}

SRes LzmaDecode	(	Byte *	dest,
		SizeT *	destLen,
		const Byte *	src,
		SizeT *	srcLen,
		const Byte *	propData,
		unsigned	propSize,
		ELzmaFinishMode	finishMode,
		ELzmaStatus *	status,
		ISzAlloc *	alloc
	)

Definition at line 969 of file LzmaDec.cc.

References alignCSCRings::dest, CLzmaDec::dic, CLzmaDec::dicBufSize, CLzmaDec::dicPos, LZMA_STATUS_NEEDS_MORE_INPUT, LzmaDec_AllocateProbs(), LzmaDec_Construct, LzmaDec_DecodeToDic(), LzmaDec_FreeProbs(), LzmaDec_Init(), AlCaHLTBitMon_ParallelJobs::p, RC_INIT_SIZE, SZ_ERROR_INPUT_EOF, and SZ_OK.

{
  CLzmaDec p;
  SRes res;
  SizeT inSize = *srcLen;
  SizeT outSize = *destLen;
  *srcLen = *destLen = 0;
  if (inSize < RC_INIT_SIZE)
    return SZ_ERROR_INPUT_EOF;

  LzmaDec_Construct(&p);
  res = LzmaDec_AllocateProbs(&p, propData, propSize, alloc);
  if (res != 0)
    return res;
  p.dic = dest;
  p.dicBufSize = outSize;

  LzmaDec_Init(&p);
  
  *srcLen = inSize;
  res = LzmaDec_DecodeToDic(&p, outSize, src, srcLen, finishMode, status);

  if (res == SZ_OK && *status == LZMA_STATUS_NEEDS_MORE_INPUT)
    res = SZ_ERROR_INPUT_EOF;

  (*destLen) = p.dicPos;
  LzmaDec_FreeProbs(&p, alloc);
  return res;
}

SRes LzmaProps_Decode	(	CLzmaProps *	p,
		const Byte *	data,
		unsigned	size
	)

Definition at line 898 of file LzmaDec.cc.

References _CLzmaProps::dicSize, _CLzmaProps::lc, _CLzmaProps::lp, LZMA_DIC_MIN, LZMA_PROPS_SIZE, _CLzmaProps::pb, SZ_ERROR_UNSUPPORTED, and SZ_OK.

Referenced by LzmaDec_Allocate(), and LzmaDec_AllocateProbs().

{
  UInt32 dicSize;
  Byte d;
  
  if (size < LZMA_PROPS_SIZE)
    return SZ_ERROR_UNSUPPORTED;
  else
    dicSize = data[1] | ((UInt32)data[2] << 8) | ((UInt32)data[3] << 16) | ((UInt32)data[4] << 24);
 
  if (dicSize < LZMA_DIC_MIN)
    dicSize = LZMA_DIC_MIN;
  p->dicSize = dicSize;

  d = data[0];
  if (d >= (9 * 5 * 5))
    return SZ_ERROR_UNSUPPORTED;

  p->lc = d % 9;
  d /= 9;
  p->pb = d / 5;
  p->lp = d % 5;

  return SZ_OK;
}