LzmaDec.h File Reference

#include "Types.h"

Go to the source code of this file.

Classes
struct	_CLzmaProps
struct	CLzmaDec

Macros
#define	CLzmaProb   UInt16
#define	LZMA_PROPS_SIZE   5
#define	LZMA_REQUIRED_INPUT_MAX   20
#define	LzmaDec_Construct(p)

Typedefs
typedef struct _CLzmaProps	CLzmaProps

Enumerations
enum	ELzmaFinishMode { LZMA_FINISH_ANY, LZMA_FINISH_END }
enum	ELzmaStatus {   LZMA_STATUS_NOT_SPECIFIED, LZMA_STATUS_FINISHED_WITH_MARK, LZMA_STATUS_NOT_FINISHED, LZMA_STATUS_NEEDS_MORE_INPUT,   LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK }

Functions
SRes	LzmaDec_Allocate (CLzmaDec *state, const Byte *prop, unsigned propsSize, ISzAlloc *alloc)
SRes	LzmaDec_AllocateProbs (CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
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 *state, ISzAlloc *alloc)
void	LzmaDec_FreeProbs (CLzmaDec *p, ISzAlloc *alloc)
void	LzmaDec_Init (CLzmaDec *p)
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 CLzmaProb   UInt16

Definition at line 20 of file LzmaDec.h.

Referenced by LzmaDec_AllocateProbs2(), LzmaDec_DecodeReal(), LzmaDec_InitStateReal(), and LzmaDec_TryDummy().

#define LZMA_PROPS_SIZE   5

Definition at line 25 of file LzmaDec.h.

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

#define LZMA_REQUIRED_INPUT_MAX   20

Definition at line 45 of file LzmaDec.h.

Referenced by LzmaDec_DecodeToDic().

#define LzmaDec_Construct

(

p

)

Value:

{                          \
    (p)->dic = 0;            \
    (p)->probs = 0;          \
  }

Definition at line 67 of file LzmaDec.h.

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

Typedef Documentation

typedef struct _CLzmaProps CLzmaProps

Enumeration Type Documentation

enum ELzmaFinishMode

Enumerator
LZMA_FINISH_ANY
LZMA_FINISH_END

Definition at line 79 of file LzmaDec.h.

             {
  LZMA_FINISH_ANY, /* finish at any point */
  LZMA_FINISH_END  /* block must be finished at the end */
} ELzmaFinishMode;

enum ELzmaStatus

Enumerator
LZMA_STATUS_NOT_SPECIFIED
LZMA_STATUS_FINISHED_WITH_MARK
LZMA_STATUS_NOT_FINISHED
LZMA_STATUS_NEEDS_MORE_INPUT
LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK

Definition at line 99 of file LzmaDec.h.

             {
  LZMA_STATUS_NOT_SPECIFIED,              /* use main error code instead */
  LZMA_STATUS_FINISHED_WITH_MARK,         /* stream was finished with end mark. */
  LZMA_STATUS_NOT_FINISHED,               /* stream was not finished */
  LZMA_STATUS_NEEDS_MORE_INPUT,           /* you must provide more input bytes */
  LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK /* there is probability that stream was finished without end mark */
} ELzmaStatus;

Function Documentation

SRes LzmaDec_Allocate	(	CLzmaDec *	state,
		const Byte *	prop,
		unsigned	propsSize,
		ISzAlloc *	alloc
	)

Definition at line 887 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 == nullptr || dicBufSize != p->dicBufSize) {
    LzmaDec_FreeDict(p, alloc);
    p->dic = (Byte *)alloc->Alloc(alloc, dicBufSize);
    if (p->dic == nullptr) {
      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 879 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;
}

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

Definition at line 786 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 683 of file LzmaDec.cc.

References CLzmaDec::buf, CLzmaDec::code, CLzmaDec::dicPos, DUMMY_ERROR, DUMMY_MATCH, 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 *	state,
		ISzAlloc *	alloc
	)

Definition at line 837 of file LzmaDec.cc.

References LzmaDec_FreeDict(), and LzmaDec_FreeProbs().

Referenced by LzmaFile::Close().

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

void LzmaDec_FreeProbs	(	CLzmaDec *	p,
		ISzAlloc *	alloc
	)

Definition at line 827 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 = nullptr;
}

void LzmaDec_Init

(

CLzmaDec *

p

)

Definition at line 667 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);
}

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 906 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 842 of file LzmaDec.cc.

References ztail::d, _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;
}