public void Lzma2Dec_Init()
{
mState = Lzma2State.Control;
mNeedInitDic = true;
mNeedInitState = true;
mNeedInitProp = true;
mDecoder.LzmaDec_Init();
}
/*
* finishMode:
* It has meaning only if the decoding reaches output limit (*destLen or dicLimit).
* LZMA_FINISH_ANY - use smallest number of input bytes
* LZMA_FINISH_END - read EndOfStream marker after decoding
*
* Returns:
* SZ_OK
* status:
* LZMA_STATUS_FINISHED_WITH_MARK
* LZMA_STATUS_NOT_FINISHED
* LZMA_STATUS_NEEDS_MORE_INPUT
* SZ_ERROR_DATA - Data error
*/
public SRes Lzma2Dec_DecodeToDic(long dicLimit, P <byte> src, ref long srcLen, ELzmaFinishMode finishMode, out ELzmaStatus status)
{
long inSize = srcLen;
srcLen = 0;
status = ELzmaStatus.LZMA_STATUS_NOT_SPECIFIED;
while (mState != Lzma2State.Finished)
{
long dicPos = mDecoder.mDicPos;
if (mState == Lzma2State.Error)
{
return(SZ_ERROR_DATA);
}
if (dicPos == dicLimit && finishMode == ELzmaFinishMode.LZMA_FINISH_ANY)
{
status = ELzmaStatus.LZMA_STATUS_NOT_FINISHED;
return(SZ_OK);
}
if (mState != Lzma2State.Data && mState != Lzma2State.DataCont)
{
if (srcLen == inSize)
{
status = ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT;
return(SZ_OK);
}
srcLen++;
mState = Lzma2Dec_UpdateState(src[0]);
src++;
continue;
}
long destSizeCur = dicLimit - dicPos;
long srcSizeCur = inSize - srcLen;
ELzmaFinishMode curFinishMode = ELzmaFinishMode.LZMA_FINISH_ANY;
if (mUnpackSize <= destSizeCur)
{
destSizeCur = mUnpackSize;
curFinishMode = ELzmaFinishMode.LZMA_FINISH_END;
}
if (IsUncompressedState())
{
if (srcLen == inSize)
{
status = ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT;
return(SZ_OK);
}
if (mState == Lzma2State.Data)
{
bool initDic = (mControl == LZMA2_CONTROL_COPY_RESET_DIC);
if (initDic)
{
mNeedInitProp = mNeedInitState = true;
}
else if (mNeedInitDic)
{
return(SZ_ERROR_DATA);
}
mNeedInitDic = false;
mDecoder.LzmaDec_InitDicAndState(initDic, false);
}
if (srcSizeCur > destSizeCur)
{
srcSizeCur = destSizeCur;
}
if (srcSizeCur == 0)
{
return(SZ_ERROR_DATA);
}
LzmaDec_UpdateWithUncompressed(mDecoder, src, srcSizeCur);
src += srcSizeCur;
srcLen += srcSizeCur;
mUnpackSize -= (uint)srcSizeCur;
mState = (mUnpackSize == 0) ? Lzma2State.Control : Lzma2State.DataCont;
}
else
{
long outSizeProcessed;
if (mState == Lzma2State.Data)
{
int mode = GetLzmaMode();
bool initDic = (mode == 3);
bool initState = (mode > 0);
if ((!initDic && mNeedInitDic) || (!initState && mNeedInitState))
{
return(SZ_ERROR_DATA);
}
mDecoder.LzmaDec_InitDicAndState(initDic, initState);
mNeedInitDic = false;
mNeedInitState = false;
mState = Lzma2State.DataCont;
}
if (srcSizeCur > mPackSize)
{
srcSizeCur = mPackSize;
}
SRes res = mDecoder.LzmaDec_DecodeToDic(dicPos + destSizeCur, src, ref srcSizeCur, curFinishMode, out status);
src += srcSizeCur;
srcLen += srcSizeCur;
mPackSize -= (uint)srcSizeCur;
outSizeProcessed = mDecoder.mDicPos - dicPos;
mUnpackSize -= (uint)outSizeProcessed;
if (res != SZ_OK)
{
return(res);
}
if (status == ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT)
{
return(res);
}
if (srcSizeCur == 0 && outSizeProcessed == 0)
{
if (status != ELzmaStatus.LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK || mUnpackSize != 0 || mPackSize != 0)
{
return(SZ_ERROR_DATA);
}
mState = Lzma2State.Control;
}
if (status == ELzmaStatus.LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK)
{
status = ELzmaStatus.LZMA_STATUS_NOT_FINISHED;
}
}
}
status = ELzmaStatus.LZMA_STATUS_FINISHED_WITH_MARK;
return(SZ_OK);
}
public void Lzma2Dec_Init()
{
mState = Lzma2State.Control;
mNeedInitDic = true;
mNeedInitState = true;
mNeedInitProp = true;
mDecoder.LzmaDec_Init();
}
/*
finishMode:
It has meaning only if the decoding reaches output limit (*destLen or dicLimit).
LZMA_FINISH_ANY - use smallest number of input bytes
LZMA_FINISH_END - read EndOfStream marker after decoding
Returns:
SZ_OK
status:
LZMA_STATUS_FINISHED_WITH_MARK
LZMA_STATUS_NOT_FINISHED
LZMA_STATUS_NEEDS_MORE_INPUT
SZ_ERROR_DATA - Data error
*/
public SRes Lzma2Dec_DecodeToDic(long dicLimit, P<byte> src, ref long srcLen, ELzmaFinishMode finishMode, out ELzmaStatus status)
{
long inSize = srcLen;
srcLen = 0;
status = ELzmaStatus.LZMA_STATUS_NOT_SPECIFIED;
while (mState != Lzma2State.Finished)
{
long dicPos = mDecoder.mDicPos;
if (mState == Lzma2State.Error)
return SZ_ERROR_DATA;
if (dicPos == dicLimit && finishMode == ELzmaFinishMode.LZMA_FINISH_ANY)
{
status = ELzmaStatus.LZMA_STATUS_NOT_FINISHED;
return SZ_OK;
}
if (mState != Lzma2State.Data && mState != Lzma2State.DataCont)
{
if (srcLen == inSize)
{
status = ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT;
return SZ_OK;
}
srcLen++;
mState = Lzma2Dec_UpdateState(src[0]);
src++;
continue;
}
long destSizeCur = dicLimit - dicPos;
long srcSizeCur = inSize - srcLen;
ELzmaFinishMode curFinishMode = ELzmaFinishMode.LZMA_FINISH_ANY;
if (mUnpackSize <= destSizeCur)
{
destSizeCur = mUnpackSize;
curFinishMode = ELzmaFinishMode.LZMA_FINISH_END;
}
if (IsUncompressedState())
{
if (srcLen == inSize)
{
status = ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT;
return SZ_OK;
}
if (mState == Lzma2State.Data)
{
bool initDic = (mControl == LZMA2_CONTROL_COPY_RESET_DIC);
if (initDic)
mNeedInitProp = mNeedInitState = true;
else if (mNeedInitDic)
return SZ_ERROR_DATA;
mNeedInitDic = false;
mDecoder.LzmaDec_InitDicAndState(initDic, false);
}
if (srcSizeCur > destSizeCur)
srcSizeCur = destSizeCur;
if (srcSizeCur == 0)
return SZ_ERROR_DATA;
LzmaDec_UpdateWithUncompressed(mDecoder, src, srcSizeCur);
src += srcSizeCur;
srcLen += srcSizeCur;
mUnpackSize -= (uint)srcSizeCur;
mState = (mUnpackSize == 0) ? Lzma2State.Control : Lzma2State.DataCont;
}
else
{
long outSizeProcessed;
if (mState == Lzma2State.Data)
{
int mode = GetLzmaMode();
bool initDic = (mode == 3);
bool initState = (mode > 0);
if ((!initDic && mNeedInitDic) || (!initState && mNeedInitState))
return SZ_ERROR_DATA;
mDecoder.LzmaDec_InitDicAndState(initDic, initState);
mNeedInitDic = false;
mNeedInitState = false;
mState = Lzma2State.DataCont;
}
if (srcSizeCur > mPackSize)
srcSizeCur = mPackSize;
SRes res = mDecoder.LzmaDec_DecodeToDic(dicPos + destSizeCur, src, ref srcSizeCur, curFinishMode, out status);
src += srcSizeCur;
srcLen += srcSizeCur;
mPackSize -= (uint)srcSizeCur;
outSizeProcessed = mDecoder.mDicPos - dicPos;
mUnpackSize -= (uint)outSizeProcessed;
if (res != SZ_OK)
return res;
if (status == ELzmaStatus.LZMA_STATUS_NEEDS_MORE_INPUT)
return res;
if (srcSizeCur == 0 && outSizeProcessed == 0)
{
if (status != ELzmaStatus.LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK || mUnpackSize != 0 || mPackSize != 0)
return SZ_ERROR_DATA;
mState = Lzma2State.Control;
}
if (status == ELzmaStatus.LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK)
status = ELzmaStatus.LZMA_STATUS_NOT_FINISHED;
}
}
status = ELzmaStatus.LZMA_STATUS_FINISHED_WITH_MARK;
return SZ_OK;
}
