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);
}
STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *prop, UInt32 size)
{
if (size != 1) return SZ_ERROR_UNSUPPORTED;
RINOK(SResToHRESULT(Lzma2Dec_Allocate(&_state, prop[0], &g_Alloc)));
if (_inBuf == 0)
{
_inBuf = (Byte *)MyAlloc(kInBufSize);
if (_inBuf == 0)
return E_OUTOFMEMORY;
}
return S_OK;
}
