int lzma_init(gzFile infile, struct LZMAFile **lzmaFile)
{
LZMAFile *inBuffer;
g_totalRead = 0;
*lzmaFile = inBuffer = (LZMAFile *)malloc(sizeof(struct LZMAFile));
if (inBuffer == NULL) return -1;
memset(inBuffer, 0, sizeof(LZMAFile));
inBuffer->File = infile;
inBuffer->InCallback.Read = LzmaReadCompressed;
inBuffer->waitEOS = 1;
/* Read LZMA properties for compressed stream */
if (!MyReadFileAndCheck(infile, inBuffer->properties, LZMA_PROPERTIES_SIZE))
return -1;
/* Read uncompressed size */
{
int i;
for (i = 0; i < 8; i++)
{
unsigned char b;
if (!MyReadFileAndCheck(infile, &b, 1))
return -1;
if (b != 0xFF)
inBuffer->waitEOS = 0;
if (i < 4)
inBuffer->outSize += (UInt32)(b) << (i * 8);
else
inBuffer->outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
}
}
/* Decode LZMA properties and allocate memory */
if (LzmaDecodeProperties(&(inBuffer->state.Properties), inBuffer->properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK)
{
PrintMessage("Incorrect stream properties");
return -1;
}
inBuffer->state.Probs = (CProb *)malloc(LzmaGetNumProbs(&(inBuffer->state.Properties)) * sizeof(CProb));
if (inBuffer->state.Probs == NULL) return -1;
inBuffer->state.Dictionary = (unsigned char *)malloc(inBuffer->state.Properties.DictionarySize);
if (inBuffer->state.Dictionary == NULL) return -1;
LzmaDecoderInit(&(inBuffer->state));
return 0;
}
static int Decode(FILE *inFile, FILE *outFile, char *rs)
{
UInt64 unpackSize;
int thereIsSize; /* = 1, if there is uncompressed size in headers */
int i;
int res = 0;
CLzmaDec state;
/* header: 5 bytes of LZMA properties and 8 bytes of uncompressed size */
unsigned char header[LZMA_PROPS_SIZE + 8];
/* Read and parse header */
if (!MyReadFileAndCheck(inFile, header, sizeof(header)))
return PrintError(rs, kCantReadMessage);
unpackSize = 0;
thereIsSize = 0;
for (i = 0; i < 8; i++)
{
unsigned char b = header[LZMA_PROPS_SIZE + i];
if (b != 0xFF)
thereIsSize = 1;
unpackSize += (UInt64)b << (i * 8);
}
LzmaDec_Construct(&state);
res = LzmaDec_Allocate(&state, header, LZMA_PROPS_SIZE, &g_Alloc);
if (res != SZ_OK)
return res;
{
Byte inBuf[IN_BUF_SIZE];
Byte outBuf[OUT_BUF_SIZE];
size_t inPos = 0, inSize = 0, outPos = 0;
LzmaDec_Init(&state);
for (;;)
{
if (inPos == inSize)
{
inSize = MyReadFile(inFile, inBuf, IN_BUF_SIZE);
inPos = 0;
}
{
SizeT inProcessed = inSize - inPos;
SizeT outProcessed = OUT_BUF_SIZE - outPos;
ELzmaFinishMode finishMode = LZMA_FINISH_ANY;
ELzmaStatus status;
if (thereIsSize && outProcessed > unpackSize)
{
outProcessed = (SizeT)unpackSize;
finishMode = LZMA_FINISH_END;
}
res = LzmaDec_DecodeToBuf(&state, outBuf + outPos, &outProcessed,
inBuf + inPos, &inProcessed, finishMode, &status);
inPos += (UInt32)inProcessed;
outPos += outProcessed;
unpackSize -= outProcessed;
if (outFile != 0)
MyWriteFile(outFile, outBuf, outPos);
outPos = 0;
if (res != SZ_OK || thereIsSize && unpackSize == 0)
break;
if (inProcessed == 0 && outProcessed == 0)
{
if (thereIsSize || status != LZMA_STATUS_FINISHED_WITH_MARK)
res = SZ_ERROR_DATA;
break;
}
}
}
}
LzmaDec_Free(&state, &g_Alloc);
return res;
}