SRes Lzma2Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
Byte prop, ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAlloc *alloc)
{
CLzma2Dec decoder;
SRes res;
SizeT outSize = *destLen, inSize = *srcLen;
Byte props[LZMA_PROPS_SIZE];
Lzma2Dec_Construct(&decoder);
*destLen = *srcLen = 0;
*status = LZMA_STATUS_NOT_SPECIFIED;
decoder.decoder.dic = dest;
decoder.decoder.dicBufSize = outSize;
RINOK(Lzma2Dec_GetOldProps(prop, props));
RINOK(LzmaDec_AllocateProbs(&decoder.decoder, props, LZMA_PROPS_SIZE, alloc));
*srcLen = inSize;
res = Lzma2Dec_DecodeToDic(&decoder, outSize, src, srcLen, finishMode, status);
*destLen = decoder.decoder.dicPos;
if (res == SZ_OK && *status == LZMA_STATUS_NEEDS_MORE_INPUT)
res = SZ_ERROR_INPUT_EOF;
LzmaDec_FreeProbs(&decoder.decoder, alloc);
return res;
}
CLzma2Dec* ZPatcher::InitLzma2Decoder(const Byte& props)
{
CLzma2Dec* dec = static_cast<CLzma2Dec*>(malloc(sizeof(CLzma2Dec)));
Lzma2Dec_Construct(dec);
SRes res = Lzma2Dec_Allocate(dec, props, &LzmaSzAlloc);
assert(res == SZ_OK);
return dec;
}
void UnCompressWithLZMA2(std::vector<unsigned char> &outBuf, const std::vector<unsigned char> &inBuf)
{
CLzma2Dec dec;
Lzma2Dec_Construct(&dec);
UInt64 unpackSize = 0;
SRes res = Lzma2Dec_Allocate(&dec, inBuf[0], &g_Alloc);
assert(res == SZ_OK);
Lzma2Dec_Init(&dec);
for (int i = 0; i < 8; i++)
unpackSize += (UInt64)inBuf[1+i] << (i * 8);
outBuf.resize(unpackSize);
unsigned outPos = 0, inPos = 9;
ELzmaStatus status;
const unsigned BUF_SIZE = 10240;
while (outPos < outBuf.size())
{
SizeT destLen = min(BUF_SIZE, outBuf.size() - outPos);
SizeT srcLen = min(BUF_SIZE, inBuf.size() - inPos);
res = Lzma2Dec_DecodeToBuf(&dec,
&outBuf[outPos],
&destLen,
&inBuf[inPos],
&srcLen,
(outPos + destLen == outBuf.size()) ? LZMA_FINISH_END : LZMA_FINISH_ANY,
&status);
unsigned int outbufsize = outBuf.size();
assert(res == SZ_OK);
inPos += srcLen;
outPos += destLen;
if (status == LZMA_STATUS_FINISHED_WITH_MARK)
{
break;
}
}
Lzma2Dec_Free(&dec, &g_Alloc);
outBuf.resize(outPos);
FILE *fout = fopen("data22.dc", "wb+");
fwrite(&outBuf[0], 1, outBuf.size(), fout);
fclose(fout);
}
static SRes SzDecodeLzma2(CSzCoderInfo *coder, UInt64 inSize, ILookInStream *inStream,
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain)
{
CLzma2Dec state;
SRes res = SZ_OK;
Lzma2Dec_Construct(&state);
if (coder->Props.size != 1)
return SZ_ERROR_DATA;
RINOK(Lzma2Dec_AllocateProbs(&state, coder->Props.data[0], allocMain));
state.decoder.dic = outBuffer;
state.decoder.dicBufSize = outSize;
Lzma2Dec_Init(&state);
for (;;)
{
Byte *inBuf = NULL;
size_t lookahead = (1 << 18);
if (lookahead > inSize)
lookahead = (size_t)inSize;
res = inStream->Look((void *)inStream, (const void **)&inBuf, &lookahead);
if (res != SZ_OK)
break;
{
SizeT inProcessed = (SizeT)lookahead, dicPos = state.decoder.dicPos;
ELzmaStatus status;
res = Lzma2Dec_DecodeToDic(&state, outSize, inBuf, &inProcessed, LZMA_FINISH_END, &status);
lookahead -= inProcessed;
inSize -= inProcessed;
if (res != SZ_OK)
break;
if (state.decoder.dicPos == state.decoder.dicBufSize || (inProcessed == 0 && dicPos == state.decoder.dicPos))
{
if (state.decoder.dicBufSize != outSize || lookahead != 0 ||
(status != LZMA_STATUS_FINISHED_WITH_MARK))
res = SZ_ERROR_DATA;
break;
}
res = inStream->Skip((void *)inStream, inProcessed);
if (res != SZ_OK)
break;
}
}
Lzma2Dec_FreeProbs(&state, allocMain);
return res;
}
SRes Lzma2Decode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
Byte prop, ELzmaFinishMode finishMode, ELzmaStatus *status, ISzAllocPtr alloc)
{
CLzma2Dec p;
SRes res;
SizeT outSize = *destLen, inSize = *srcLen;
*destLen = *srcLen = 0;
*status = LZMA_STATUS_NOT_SPECIFIED;
Lzma2Dec_Construct(&p);
RINOK(Lzma2Dec_AllocateProbs(&p, prop, alloc));
p.decoder.dic = dest;
p.decoder.dicBufSize = outSize;
Lzma2Dec_Init(&p);
*srcLen = inSize;
res = Lzma2Dec_DecodeToDic(&p, outSize, src, srcLen, finishMode, status);
*destLen = p.decoder.dicPos;
if (res == SZ_OK && *status == LZMA_STATUS_NEEDS_MORE_INPUT)
res = SZ_ERROR_INPUT_EOF;
Lzma2Dec_FreeProbs(&p, alloc);
return res;
}
CDecoder::CDecoder(): _inBuf(0), _outSizeDefined(false)
{
Lzma2Dec_Construct(&_state);
}