/* LzmaDec.c -- LZMA Decoder
2009-09-20 : Igor Pavlov : Public domain */

#include "LzmaDec.h"

#include <string.h>

#define kNumTopBits 24
#define kTopValue ((UInt32)1 << kNumTopBits)

#define kNumBitModelTotalBits 11
#define kBitModelTotal (1 << kNumBitModelTotalBits)
#define kNumMoveBits 5

#define RC_INIT_SIZE 5

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

#define IF_BIT_0(p) ttt = *(p); NORMALIZE; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
#define UPDATE_0(p) range = bound; *(p) = (CLzmaProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits));
#define UPDATE_1(p) range -= bound; code -= bound; *(p) = (CLzmaProb)(ttt - (ttt >> kNumMoveBits));
#define GET_BIT2(p, i, A0, A1) IF_BIT_0(p) \
  { UPDATE_0(p); i = (i + i); A0; } else \
  { UPDATE_1(p); i = (i + i) + 1; A1; }
#define GET_BIT(p, i) GET_BIT2(p, i, ; , ;)

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

/* #define _LZMA_SIZE_OPT */

#ifdef _LZMA_SIZE_OPT
#define TREE_6_DECODE(probs, i) TREE_DECODE(probs, (1 << 6), i)
#else
#define TREE_6_DECODE(probs, i) \
  { 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; }
#endif

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

#define IF_BIT_0_CHECK(p) ttt = *(p); NORMALIZE_CHECK; bound = (range >> kNumBitModelTotalBits) * ttt; if (code < bound)
#define UPDATE_0_CHECK range = bound;
#define UPDATE_1_CHECK range -= bound; code -= bound;
#define GET_BIT2_CHECK(p, i, A0, A1) IF_BIT_0_CHECK(p) \
  { UPDATE_0_CHECK; i = (i + i); A0; } else \
  { UPDATE_1_CHECK; i = (i + i) + 1; A1; }
#define GET_BIT_CHECK(p, i) GET_BIT2_CHECK(p, i, ; , ;)
#define TREE_DECODE_CHECK(probs, limit, i) \
  { i = 1; do { GET_BIT_CHECK(probs + i, i) } while (i < limit); i -= limit; }


#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 kMatchSpecLenStart (kMatchMinLen + kLenNumLowSymbols + kLenNumMidSymbols + kLenNumHighSymbols)

#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)

#define LZMA_BASE_SIZE 1846
#define LZMA_LIT_SIZE 768

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

#if Literal != LZMA_BASE_SIZE
StopCompilingDueBUG
#endif

#define LZMA_DIC_MIN (1 << 12)

	/* First LZMA-symbol is always decoded.
	And it decodes new LZMA-symbols while (buf < bufLimit), but "buf" is without last normalization
	Out:
	Result:
	SZ_OK - OK
	SZ_ERROR_DATA - Error
	p->remainLen:
	< kMatchSpecLenStart : normal remain
	= kMatchSpecLenStart : finished
	= kMatchSpecLenStart + 1 : Flush marker
	= kMatchSpecLenStart + 2 : State Init Marker
	*/

	static int MY_FAST_CALL LzmaDec_DecodeReal(CLzmaDec *p, SizeT limit, const Byte *bufLimit)
{
	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 void MY_FAST_CALL LzmaDec_WriteRem(CLzmaDec *p, SizeT limit)
{
	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;
	}
}

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

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

static ELzmaDummy LzmaDec_TryDummy(const CLzmaDec *p, const Byte *buf, SizeT inSize)
{
	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 LzmaDec_InitRc(CLzmaDec *p, const Byte *data)
{
	p->code = ((UInt32)data[1] << 24) | ((UInt32)data[2] << 16) | ((UInt32)data[3] << 8) | ((UInt32)data[4]);
	p->range = 0xFFFFFFFF;
	p->needFlush = 0;
}

void LzmaDec_InitDicAndState(CLzmaDec *p, Bool initDic, Bool initState)
{
	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;
}

void LzmaDec_Init(CLzmaDec *p)
{
	p->dicPos = 0;
	LzmaDec_InitDicAndState(p, True, True);
}

static void LzmaDec_InitStateReal(CLzmaDec *p)
{
	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;
}

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

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

void LzmaDec_FreeProbs(CLzmaDec *p, ISzAlloc *alloc)
{
	alloc->Free(alloc, p->probs);
	p->probs = 0;
}

static void LzmaDec_FreeDict(CLzmaDec *p, ISzAlloc *alloc)
{
	alloc->Free(alloc, p->dic);
	p->dic = 0;
}

void LzmaDec_Free(CLzmaDec *p, ISzAlloc *alloc)
{
	LzmaDec_FreeProbs(p, alloc);
	LzmaDec_FreeDict(p, alloc);
}

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

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

SRes LzmaDec_AllocateProbs(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
{
	CLzmaProps propNew;
	RINOK(LzmaProps_Decode(&propNew, props, propsSize));
	RINOK(LzmaDec_AllocateProbs2(p, &propNew, alloc));
	p->prop = propNew;
	return SZ_OK;
}

SRes LzmaDec_Allocate(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
{
	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 LzmaDecode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, const Byte *propData, unsigned propSize, 
	ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAlloc *alloc)
{
	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;
}
