public void Extract(
FileStream inStream,
ArchiveDatabaseEx db,
uint fileIndex,
out uint blockIndex,
out byte[] outBuffer,
out ulong outBufferSize,
ref ulong offset,
ref ulong outSizeProcessed)
{
//Console.WriteLine("Extract >>>");
uint folderIndex = db.FileIndexToFolderIndexMap[fileIndex];
offset = 0;
outSizeProcessed = 0;
outBuffer = null;
if (folderIndex == UInt32.MaxValue)
{
//Console.WriteLine("folderindex is UInt32.MaxValue");
blockIndex = folderIndex;
outBuffer = null;
outBufferSize = 0;
return;
}
Folder folder = db.Database.Folders[folderIndex];
ulong unPackSize = folder.GetUnPackSize();
//#ifndef _LZMA_IN_CB
ulong packSize = db.GetFolderFullPackSize(folderIndex);
//Console.WriteLine("packsize: " + packSize + " unpacksize: " + unPackSize );
//Byte *inBuffer = 0;
//size_t processedSize;
//#endif
blockIndex = folderIndex;
outBuffer = null;
//Console.WriteLine("folderstreampos: " + db.GetFolderStreamPos(folderIndex, 0));
inStream.Seek((long)db.GetFolderStreamPos(folderIndex, 0), SeekOrigin.Begin);
//RINOK(inStream->Seek(inStream, SzArDbGetFolderStreamPos(db, folderIndex, 0)));
//#ifndef _LZMA_IN_CB
//if (packSize != 0)
//{
// inBuffer = (Byte *)allocTemp->Alloc((size_t)packSize);
// if (inBuffer == 0)
// return SZE_OUTOFMEMORY;
// }
// res = inStream->Read(inStream, inBuffer, (size_t)packSize, &processedSize);
// if (res == SZ_OK && processedSize != (size_t)packSize)
// res = SZE_FAIL;
//#endif
outBufferSize = unPackSize;
if (unPackSize != 0)
{
outBuffer = new byte[unPackSize];
//*outBuffer = (Byte *)allocMain->Alloc((size_t)unPackSize);
//if (*outBuffer == 0)
//res = SZE_OUTOFMEMORY;
}
ulong outRealSize;
Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
decoder.SetDecoderProperties(folder.Coders[0].Properties);
Stream outStream = new MemoryStream(outBuffer);
decoder.Code(inStream, outStream, (long)packSize, (long)unPackSize, null);
//SzDecode(db.Database.PackSizes +
// db.FolderStartPackStreamIndex[folderIndex], folder,
// //#ifdef _LZMA_IN_CB
// inStream,
// //#else
// //inBuffer,
// //#endif
//outBuffer, unPackSize, out outRealSize);
outStream.Close();
//Console.WriteLine( Encoding.UTF8.GetString( outBuffer, 0, (int)unPackSize ) );
outRealSize = unPackSize;
if (outRealSize == unPackSize)
{
//if (folde.UnPackCRCDefined)
//{
// if (!CrcVerifyDigest(folder->UnPackCRC, *outBuffer, (size_t)unPackSize))
// res = SZE_FAIL;
//}
}
else
{
throw new Exception("Unpack size was different from packsize: " + unPackSize + " vs " + outRealSize);
//res = SZE_FAIL;
}
UInt32 i;
FileItem fileItem = db.Database.Files[fileIndex];
offset = 0;
for (i = db.FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
{
offset += (UInt32)db.Database.Files[i].Size;
}
outSizeProcessed = fileItem.Size;
if (offset + outSizeProcessed > outBufferSize)
{
throw new Exception("offset + outsizeprocessed > outbuffersize " + offset + " + " + outSizeProcessed + " > " + outBufferSize);
// return SZE_FAIL;
}
//if (fileItem->IsFileCRCDefined)
//{
// if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer + *offset, *outSizeProcessed))
// res = SZE_FAIL;
//}
}
public static Dictionary<string, byte[]> ExtractFolder(
FileStream inStream,
ArchiveDatabaseEx db,
uint folderIndex)
{
Dictionary<string, byte[]> fileDict = new Dictionary<string, byte[]>();
ulong packSize = db.GetFolderFullPackSize(folderIndex);
Folder folder = db.Database.Folders[folderIndex];
ulong unPackSize = folder.GetUnPackSize();
//byte[] outBuffer; = new byte[unPackSize];
inStream.Seek((long)db.GetFolderStreamPos(folderIndex, 0), SeekOrigin.Begin);
Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
decoder.SetDecoderProperties(folder.Coders[0].Properties);
using (MemoryStream ms = new MemoryStream())
{
decoder.Code(inStream, ms, (long)packSize, (long)unPackSize, null);
//Extract file
FileItem[] fileItemList = db.Database.Files;
long offset = 0;
for (uint i = db.FolderStartFileIndex[folderIndex]; i < fileItemList.Length; i++)
{
FileItem item = fileItemList[i];
if (item.IsDirectory)
continue;
byte[] tempBuf = new byte[item.Size];
if ((offset + (long)item.Size) > ms.Capacity)
throw new Exception("offset + filesize > length " + offset + " + " + item.Size + " > " + ms.Capacity);
ms.Seek(offset, SeekOrigin.Begin);
ms.Read(tempBuf, 0, tempBuf.Length);
string fileName = item.Name.Replace("\0", "");
fileDict.Add(fileName, tempBuf);
offset += (long)fileItemList[i].Size;
}
}
return fileDict;
}