void szReadStreamsInfo(SzData sd, out ulong dataOffset,
ArchiveDatabase db,
out uint numUnPackStreams, out ulong[] unPackSizes,
out bool[]packCRCsDefined, out uint[] packCRCs)
{
//Console.WriteLine("szReadStreamsInfo >>>");
numUnPackStreams = 0;
unPackSizes = null;
packCRCsDefined = null;
packCRCs = null;
dataOffset = 0;
while (true)
{
EIdEnum type = szReadID(sd );
//Console.WriteLine( "ReadStreamsInfox, got type: " + type);
switch (type)
{
case EIdEnum.k7zIdEnd:
return;
case EIdEnum.k7zIdPackInfo:
//Console.WriteLine("calling szReadPackInfo...");
szReadPackInfo(sd, out dataOffset, out db.NumPackStreams,
out db.PackSizes, out db.PackCRCsDefined, out db.PackCRCs);
//Console.WriteLine("szReadStreamsInfo, crc info: ");
break;
case EIdEnum.k7zIdUnPackInfo:
szReadUnPackInfo(sd,out db.NumFolders, out db.Folders );
break;
case EIdEnum.k7zIdSubStreamsInfo:
szReadSubStreamsInfo(sd, db.Folders,
out numUnPackStreams, out unPackSizes, out packCRCsDefined, out packCRCs );
//RINOK(SzReadSubStreamsInfo(sd, db->NumFolders, db->Folders,
// numUnPackStreams, unPackSizes, digestsDefined, digests, allocTemp));
break;
default:
throw new Exception("Unexpected type in szReadStreamsInfo " + type);
}
}
//Console.WriteLine("szReadStreamsInfo <<<");
}
void SzReadAndDecodePackedStreams2(
FileStream inStream,
SzData sd,
out byte[] outBuffer,
ulong baseOffset,
ArchiveDatabase db,
out ulong[] unPackSizes,
out bool[] digestsDefined,
out uint[] digests
)
{
uint numUnPackStreams = 0;
ulong dataStartPos = 0;
Folder folder;
ulong unPackSize;
//ulong outRealSize;
ulong packSize = 0;
//uint i = 0;
outBuffer = null;
szReadStreamsInfo(sd, out dataStartPos, db, out numUnPackStreams, out unPackSizes,
out digestsDefined, out digests);
//RINOK(SzReadStreamsInfo(sd, &dataStartPos, db,
//&numUnPackStreams, unPackSizes, digestsDefined, digests,
//allocTemp->Alloc, allocTemp));
dataStartPos += baseOffset;
if (db.NumFolders != 1)
{
throw new Exception("db.NumFolders value unexpected: " + db.NumFolders);
}
folder = db.Folders[0];
unPackSize = folder.GetUnPackSize();
//Console.WriteLine("datastartpos : " + dataStartPos);
inStream.Seek((long)dataStartPos, SeekOrigin.Begin);
//#ifndef _LZMA_IN_CB
for (uint i = 0; i < db.NumPackStreams; i++)
packSize += db.PackSizes[i];
//Console.WriteLine("packsize: " + packSize);
//RINOK(MySzInAlloc((void **)inBuffer, (size_t)packSize, allocTemp->Alloc));
//RINOK(SafeReadDirect(inStream, *inBuffer, (size_t)packSize));
//#endif
outBuffer = new byte[unPackSize];
//if (!SzByteBufferCreate(outBuffer, (size_t)unPackSize, allocTemp->Alloc))
// return SZE_OUTOFMEMORY;
byte[]inbuffer = new byte[ packSize ];
inStream.Read( inbuffer, 0, (int)packSize );
//Console.WriteLine("NumCoders: " + ( folder.Coders.GetUpperBound(0) + 1 ));
//Console.WriteLine("Coder: " + folder.Coders[0]);
//Console.WriteLine("Coder num properties: " + folder.Coders[0].Properties.GetUpperBound(0) + 1);
//DumpBytes(folder.Coders[0].Properties, folder.Coders[0].Properties.GetUpperBound(0) + 1);
inStream.Seek((long)dataStartPos, SeekOrigin.Begin);
//byte[] properties = new byte[5];
//inStream.Read(properties, 0, 5);
Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder();
decoder.SetDecoderProperties(folder.Coders[0].Properties);
MemoryStream outStream = new MemoryStream(outBuffer);
decoder.Code(inStream, outStream, (long)( packSize - 5 ), (long)unPackSize, null);
outStream.Close();
//DumpBytes(outBuffer, (int)unPackSize);
//Console.WriteLine(outBuffer.GetUpperBound(0) + 1);
//for (ulong i = 0; i < unPackSize; i++)
//{
// Console.WriteLine( (char)outBuffer[i]);
//}
//SzDecode(db.PackSizes, folder,
//#ifdef _LZMA_IN_CB
// inStream,
//#else
//*inBuffer,
//#endif
// outBuffer, unPackSize,
// out outRealSize);
//if (outRealSize != (uint)unPackSize)
//{
// throw new Exception("OutRealSize != unPackSize " + outRealSize + " vs " + unPackSize);
//}
//if (folder.UnPackCRCDefined)
//{
// note to self: to do
//if (!CrcVerifyDigest(folder->UnPackCRC, outBuffer->Items, (size_t)unPackSize))
//{
// return SZE_FAIL;
//}
//}
}
void szReadAndDecodePackedStreams(
FileStream inStream, SzData sd,
out byte[] outBuffer, ulong baseOffset)
{
ArchiveDatabase db = new ArchiveDatabase();
ulong[] unPackSizes;
bool[] digestsDefined;
uint[] digests;
SzReadAndDecodePackedStreams2(inStream, sd,
out outBuffer, baseOffset, db, out unPackSizes, out digestsDefined, out digests);
}
