internal SevenZipFilePart(Stream stream, ArchiveDatabase database, int index, CFileItem fileEntry)
{
this.stream = stream;
this.database = database;
Index = index;
Header = fileEntry;
if (Header.HasStream)
{
Folder = database.Folders[database.FileIndexToFolderIndexMap[index]];
}
}
internal SevenZipFilePart(Stream stream, ArchiveDatabase database, int index, CFileItem fileEntry)
{
this.stream = stream;
this.database = database;
Index = index;
Header = fileEntry;
if (Header.HasStream)
{
Folder = database.Folders[database.FileIndexToFolderIndexMap[index]];
}
}
internal SevenZipFilePart(Stream stream, ArchiveDatabase database, int index, CFileItem fileEntry, ArchiveEncoding archiveEncoding)
: base(archiveEncoding)
{
_stream = stream;
_database = database;
Index = index;
Header = fileEntry;
if (Header.HasStream)
{
Folder = database._folders[database._fileIndexToFolderIndexMap[index]];
}
}
private void ReadHeader(ArchiveDatabase db, IPasswordProvider getTextPassword)
{
#if DEBUG
Log.WriteLine("-- ReadHeader --");
Log.PushIndent();
#endif
try
{
BlockType? type = ReadId();
if (type == BlockType.ArchiveProperties)
{
ReadArchiveProperties();
type = ReadId();
}
List<byte[]> dataVector = null;
if (type == BlockType.AdditionalStreamsInfo)
{
dataVector = ReadAndDecodePackedStreams(db.StartPositionAfterHeader, getTextPassword);
type = ReadId();
}
List<long> unpackSizes;
List<uint?> digests;
if (type == BlockType.MainStreamsInfo)
{
ReadStreamsInfo(dataVector,
out db.DataStartPosition,
out db.PackSizes,
out db.PackCRCs,
out db.Folders,
out db.NumUnpackStreamsVector,
out unpackSizes,
out digests);
db.DataStartPosition += db.StartPositionAfterHeader;
type = ReadId();
}
else
{
unpackSizes = new List<long>(db.Folders.Count);
digests = new List<uint?>(db.Folders.Count);
db.NumUnpackStreamsVector = new List<int>(db.Folders.Count);
for (int i = 0; i < db.Folders.Count; i++)
{
var folder = db.Folders[i];
unpackSizes.Add(folder.GetUnpackSize());
digests.Add(folder.UnpackCRC);
db.NumUnpackStreamsVector.Add(1);
}
}
db.Files.Clear();
if (type == BlockType.End)
return;
if (type != BlockType.FilesInfo)
throw new InvalidOperationException();
int numFiles = ReadNum();
#if DEBUG
Log.WriteLine("NumFiles: " + numFiles);
#endif
db.Files = new List<CFileItem>(numFiles);
for (int i = 0; i < numFiles; i++)
db.Files.Add(new CFileItem());
BitVector emptyStreamVector = new BitVector(numFiles);
BitVector emptyFileVector = null;
BitVector antiFileVector = null;
int numEmptyStreams = 0;
for (; ; )
{
type = ReadId();
if (type == BlockType.End)
break;
long size = checked((long)ReadNumber()); // TODO: throw invalid data on negative
int oldPos = _currentReader.Offset;
switch (type)
{
case BlockType.Name:
using (var streamSwitch = new CStreamSwitch())
{
streamSwitch.Set(this, dataVector);
#if DEBUG
Log.Write("FileNames:");
#endif
for (int i = 0; i < db.Files.Count; i++)
{
db.Files[i].Name = _currentReader.ReadString();
#if DEBUG
Log.Write(" " + db.Files[i].Name);
#endif
}
#if DEBUG
Log.WriteLine();
#endif
}
break;
case BlockType.WinAttributes:
#if DEBUG
Log.Write("WinAttributes:");
#endif
ReadAttributeVector(dataVector, numFiles, delegate(int i, uint? attr)
{
db.Files[i].Attrib = attr;
#if DEBUG
Log.Write(" " + (attr.HasValue ? attr.Value.ToString("x8") : "n/a"));
#endif
});
#if DEBUG
Log.WriteLine();
#endif
break;
case BlockType.EmptyStream:
emptyStreamVector = ReadBitVector(numFiles);
#if DEBUG
Log.Write("EmptyStream: ");
#endif
for (int i = 0; i < emptyStreamVector.Length; i++)
{
if (emptyStreamVector[i])
{
#if DEBUG
Log.Write("x");
#endif
numEmptyStreams++;
}
else
{
#if DEBUG
Log.Write(".");
#endif
}
}
#if DEBUG
Log.WriteLine();
#endif
emptyFileVector = new BitVector(numEmptyStreams);
antiFileVector = new BitVector(numEmptyStreams);
break;
case BlockType.EmptyFile:
emptyFileVector = ReadBitVector(numEmptyStreams);
#if DEBUG
Log.Write("EmptyFile: ");
for (int i = 0; i < numEmptyStreams; i++)
Log.Write(emptyFileVector[i] ? "x" : ".");
Log.WriteLine();
#endif
break;
case BlockType.Anti:
antiFileVector = ReadBitVector(numEmptyStreams);
#if DEBUG
Log.Write("Anti: ");
for (int i = 0; i < numEmptyStreams; i++)
Log.Write(antiFileVector[i] ? "x" : ".");
Log.WriteLine();
#endif
break;
case BlockType.StartPos:
#if DEBUG
Log.Write("StartPos:");
#endif
ReadNumberVector(dataVector, numFiles, delegate(int i, long? startPos)
{
db.Files[i].StartPos = startPos;
#if DEBUG
Log.Write(" " + (startPos.HasValue ? startPos.Value.ToString() : "n/a"));
#endif
});
#if DEBUG
Log.WriteLine();
#endif
break;
case BlockType.CTime:
#if DEBUG
Log.Write("CTime:");
#endif
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
{
db.Files[i].CTime = time;
#if DEBUG
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
#endif
});
#if DEBUG
Log.WriteLine();
#endif
break;
case BlockType.ATime:
#if DEBUG
Log.Write("ATime:");
#endif
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
{
db.Files[i].ATime = time;
#if DEBUG
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
#endif
});
#if DEBUG
Log.WriteLine();
#endif
break;
case BlockType.MTime:
#if DEBUG
Log.Write("MTime:");
#endif
ReadDateTimeVector(dataVector, numFiles, delegate(int i, DateTime? time)
{
db.Files[i].MTime = time;
#if DEBUG
Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
#endif
});
#if DEBUG
Log.WriteLine();
#endif
break;
case BlockType.Dummy:
#if DEBUG
Log.Write("Dummy: " + size);
#endif
for (long j = 0; j < size; j++)
if (ReadByte() != 0)
throw new InvalidOperationException();
break;
default:
SkipData(size);
break;
}
// since 0.3 record sizes must be correct
bool checkRecordsSize = (db.MajorVersion > 0 || db.MinorVersion > 2);
if (checkRecordsSize && _currentReader.Offset - oldPos != size)
throw new InvalidOperationException();
}
int emptyFileIndex = 0;
int sizeIndex = 0;
for (int i = 0; i < numFiles; i++)
{
CFileItem file = db.Files[i];
file.HasStream = !emptyStreamVector[i];
if (file.HasStream)
{
file.IsDir = false;
file.IsAnti = false;
file.Size = unpackSizes[sizeIndex];
file.Crc = digests[sizeIndex];
sizeIndex++;
}
else
{
file.IsDir = !emptyFileVector[emptyFileIndex];
file.IsAnti = antiFileVector[emptyFileIndex];
emptyFileIndex++;
file.Size = 0;
file.Crc = null;
}
}
}
finally
{
#if DEBUG
Log.PopIndent();
#endif
}
}
public void Extract(ArchiveDatabase _db, int[] indices, IPasswordProvider pw)
{
int numItems;
bool allFilesMode = (indices == null);
if (allFilesMode)
numItems = _db.Files.Count;
else
numItems = indices.Length;
if (numItems == 0)
return;
List<CExtractFolderInfo> extractFolderInfoVector = new List<CExtractFolderInfo>();
for (int i = 0; i < numItems; i++)
{
int fileIndex = allFilesMode ? i : indices[i];
int folderIndex = _db.FileIndexToFolderIndexMap[fileIndex];
if (folderIndex == -1)
{
extractFolderInfoVector.Add(new CExtractFolderInfo(fileIndex, -1));
continue;
}
if (extractFolderInfoVector.Count == 0 || folderIndex != extractFolderInfoVector.Last().FolderIndex)
extractFolderInfoVector.Add(new CExtractFolderInfo(-1, folderIndex));
CExtractFolderInfo efi = extractFolderInfoVector.Last();
int startIndex = _db.FolderStartFileIndex[folderIndex];
for (int index = efi.ExtractStatuses.Count; index <= fileIndex - startIndex; index++)
efi.ExtractStatuses.Add(index == fileIndex - startIndex);
}
foreach (CExtractFolderInfo efi in extractFolderInfoVector)
{
int startIndex;
if (efi.FileIndex != -1)
startIndex = efi.FileIndex;
else
startIndex = _db.FolderStartFileIndex[efi.FolderIndex];
var outStream = new FolderUnpackStream(_db, 0, startIndex, efi.ExtractStatuses);
if (efi.FileIndex != -1)
continue;
int folderIndex = efi.FolderIndex;
CFolder folderInfo = _db.Folders[folderIndex];
int packStreamIndex = _db.Folders[folderIndex].FirstPackStreamId;
long folderStartPackPos = _db.GetFolderStreamPos(folderInfo, 0);
List<long> packSizes = new List<long>();
for (int j = 0; j < folderInfo.PackStreams.Count; j++)
packSizes.Add(_db.PackSizes[packStreamIndex + j]);
// TODO: If the decoding fails the last file may be extracted incompletely. Delete it?
Stream s = DecoderStreamHelper.CreateDecoderStream(_stream, folderStartPackPos, packSizes.ToArray(),
folderInfo, pw);
byte[] buffer = new byte[4 << 10];
for (; ; )
{
int processed = s.Read(buffer, 0, buffer.Length);
if (processed == 0)
break;
outStream.Write(buffer, 0, processed);
}
}
}
private Stream GetCachedDecoderStream(ArchiveDatabase _db, int folderIndex, IPasswordProvider pw)
{
Stream s;
if (!_cachedStreams.TryGetValue(folderIndex, out s))
{
CFolder folderInfo = _db.Folders[folderIndex];
int packStreamIndex = _db.Folders[folderIndex].FirstPackStreamId;
long folderStartPackPos = _db.GetFolderStreamPos(folderInfo, 0);
List<long> packSizes = new List<long>();
for (int j = 0; j < folderInfo.PackStreams.Count; j++)
packSizes.Add(_db.PackSizes[packStreamIndex + j]);
s = DecoderStreamHelper.CreateDecoderStream(_stream, folderStartPackPos, packSizes.ToArray(), folderInfo,
pw);
_cachedStreams.Add(folderIndex, s);
}
return s;
}
public ArchiveDatabase ReadDatabase(IPasswordProvider pass)
{
var db = new ArchiveDatabase();
db.Clear();
db.MajorVersion = _header[6];
db.MinorVersion = _header[7];
if (db.MajorVersion != 0)
throw new InvalidOperationException();
uint crcFromArchive = DataReader.Get32(_header, 8);
long nextHeaderOffset = (long)DataReader.Get64(_header, 0xC);
long nextHeaderSize = (long)DataReader.Get64(_header, 0x14);
uint nextHeaderCrc = DataReader.Get32(_header, 0x1C);
uint crc = CRC.kInitCRC;
crc = CRC.Update(crc, nextHeaderOffset);
crc = CRC.Update(crc, nextHeaderSize);
crc = CRC.Update(crc, nextHeaderCrc);
crc = CRC.Finish(crc);
if (crc != crcFromArchive)
throw new InvalidOperationException();
db.StartPositionAfterHeader = _streamOrigin + 0x20;
// empty header is ok
if (nextHeaderSize == 0)
{
db.Fill();
return db;
}
if (nextHeaderOffset < 0 || nextHeaderSize < 0 || nextHeaderSize > Int32.MaxValue)
throw new InvalidOperationException();
if (nextHeaderOffset > _streamEnding - db.StartPositionAfterHeader)
throw new IndexOutOfRangeException();
_stream.Seek(nextHeaderOffset, SeekOrigin.Current);
byte[] header = new byte[nextHeaderSize];
_stream.ReadExact(header, 0, header.Length);
if (CRC.Finish(CRC.Update(CRC.kInitCRC, header, 0, header.Length)) != nextHeaderCrc)
throw new InvalidOperationException();
using (CStreamSwitch streamSwitch = new CStreamSwitch())
{
streamSwitch.Set(this, header);
BlockType? type = ReadId();
if (type != BlockType.Header)
{
if (type != BlockType.EncodedHeader)
throw new InvalidOperationException();
var dataVector = ReadAndDecodePackedStreams(db.StartPositionAfterHeader, pass);
// compressed header without content is odd but ok
if (dataVector.Count == 0)
{
db.Fill();
return db;
}
if (dataVector.Count != 1)
throw new InvalidOperationException();
streamSwitch.Set(this, dataVector[0]);
if (ReadId() != BlockType.Header)
throw new InvalidOperationException();
}
ReadHeader(db, pass);
}
db.Fill();
return db;
}
public Stream OpenStream(ArchiveDatabase _db, int fileIndex, IPasswordProvider pw)
{
int folderIndex = _db.FileIndexToFolderIndexMap[fileIndex];
int numFilesInFolder = _db.NumUnpackStreamsVector[folderIndex];
int firstFileIndex = _db.FolderStartFileIndex[folderIndex];
if (firstFileIndex > fileIndex || fileIndex - firstFileIndex >= numFilesInFolder)
throw new InvalidOperationException();
int skipCount = fileIndex - firstFileIndex;
long skipSize = 0;
for (int i = 0; i < skipCount; i++)
skipSize += _db.Files[firstFileIndex + i].Size;
Stream s = GetCachedDecoderStream(_db, folderIndex, pw);
s.Position = skipSize;
return new ReadOnlySubStream(s, _db.Files[fileIndex].Size);
}
public FolderUnpackStream(ArchiveDatabase db, int p, int startIndex, List<bool> list)
{
this._db = db;
this._startIndex = startIndex;
this._extractStatuses = list;
}
public IEnumerable<CFileItem> GetFiles(ArchiveDatabase db)
{
return db.Files;
}
public int GetFileIndex(ArchiveDatabase db, CFileItem item)
{
return db.Files.IndexOf(item);
}
private void ReadHeader(ArchiveDatabase db, IPasswordProvider getTextPassword)
{
Action<int, uint?> action = null;
Action<int, long?> action2 = null;
Action<int, DateTime?> action3 = null;
Action<int, DateTime?> action4 = null;
Action<int, DateTime?> action5 = null;
SharpCompress.Compressor.LZMA.Log.WriteLine("-- ReadHeader --");
SharpCompress.Compressor.LZMA.Log.PushIndent(" ");
try
{
List<long> list2;
List<uint?> list3;
int num;
long num6;
int num7;
bool flag2;
BlockType? nullable = this.ReadId();
if (((BlockType) nullable) == BlockType.ArchiveProperties)
{
this.ReadArchiveProperties();
nullable = this.ReadId();
}
List<byte[]> dataVector = null;
if (((BlockType) nullable) == BlockType.AdditionalStreamsInfo)
{
dataVector = this.ReadAndDecodePackedStreams(db.StartPositionAfterHeader, getTextPassword);
nullable = this.ReadId();
}
if (((BlockType) nullable) == BlockType.MainStreamsInfo)
{
this.ReadStreamsInfo(dataVector, out db.DataStartPosition, out db.PackSizes, out db.PackCRCs, out db.Folders, out db.NumUnpackStreamsVector, out list2, out list3);
db.DataStartPosition += db.StartPositionAfterHeader;
nullable = this.ReadId();
}
else
{
list2 = new List<long>(db.Folders.Count);
list3 = new List<uint?>(db.Folders.Count);
db.NumUnpackStreamsVector = new List<int>(db.Folders.Count);
for (num = 0; num < db.Folders.Count; num++)
{
CFolder folder = db.Folders[num];
list2.Add(folder.GetUnpackSize());
list3.Add(folder.UnpackCRC);
db.NumUnpackStreamsVector.Add(1);
}
}
db.Files.Clear();
if (((BlockType) nullable) == BlockType.End)
{
return;
}
if (((BlockType) nullable) != BlockType.FilesInfo)
{
throw new InvalidOperationException();
}
int capacity = this.ReadNum();
SharpCompress.Compressor.LZMA.Log.WriteLine("NumFiles: " + capacity);
db.Files = new List<CFileItem>(capacity);
num = 0;
while (num < capacity)
{
db.Files.Add(new CFileItem());
num++;
}
BitVector vector = new BitVector(capacity);
BitVector vector2 = null;
BitVector vector3 = null;
int length = 0;
goto Label_06FC;
Label_02DA:
nullable = this.ReadId();
if (((BlockType) nullable) == BlockType.End)
{
goto Label_0704;
}
long size = (long) this.ReadNumber();
int offset = this._currentReader.Offset;
BlockType valueOrDefault = nullable.GetValueOrDefault();
if (nullable.HasValue)
{
switch (valueOrDefault)
{
case BlockType.EmptyStream:
vector = this.ReadBitVector(capacity);
SharpCompress.Compressor.LZMA.Log.Write("EmptyStream: ");
num = 0;
goto Label_04AD;
case BlockType.EmptyFile:
vector2 = this.ReadBitVector(length);
SharpCompress.Compressor.LZMA.Log.Write("EmptyFile: ");
num = 0;
goto Label_0519;
case BlockType.Anti:
vector3 = this.ReadBitVector(length);
SharpCompress.Compressor.LZMA.Log.Write("Anti: ");
num = 0;
goto Label_056E;
case BlockType.Name:
goto Label_0370;
case BlockType.CTime:
goto Label_05BC;
case BlockType.ATime:
goto Label_05F3;
case BlockType.MTime:
goto Label_062A;
case BlockType.WinAttributes:
goto Label_0420;
case BlockType.StartPos:
goto Label_0585;
case BlockType.Dummy:
SharpCompress.Compressor.LZMA.Log.Write("Dummy: " + size);
num6 = 0L;
goto Label_0697;
}
}
goto Label_06A5;
Label_0370:
using (CStreamSwitch switch2 = new CStreamSwitch())
{
switch2.Set(this, dataVector);
SharpCompress.Compressor.LZMA.Log.Write("FileNames:");
num = 0;
while (num < db.Files.Count)
{
db.Files[num].Name = this._currentReader.ReadString();
SharpCompress.Compressor.LZMA.Log.Write(" " + db.Files[num].Name);
num++;
}
SharpCompress.Compressor.LZMA.Log.WriteLine();
}
goto Label_06B0;
Label_0420:
SharpCompress.Compressor.LZMA.Log.Write("WinAttributes:");
if (action == null)
{
action = delegate (int i, uint? attr) {
db.Files[i].Attrib = attr;
SharpCompress.Compressor.LZMA.Log.Write(" " + (attr.HasValue ? attr.Value.ToString("x8") : "n/a"));
};
}
this.ReadAttributeVector(dataVector, capacity, action);
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_0471:
if (vector[num])
{
SharpCompress.Compressor.LZMA.Log.Write("x");
length++;
}
else
{
SharpCompress.Compressor.LZMA.Log.Write(".");
}
num++;
Label_04AD:
if (num < vector.Length)
{
goto Label_0471;
}
SharpCompress.Compressor.LZMA.Log.WriteLine();
vector2 = new BitVector(length);
vector3 = new BitVector(length);
goto Label_06B0;
Label_04F5:
SharpCompress.Compressor.LZMA.Log.Write(vector2[num] ? "x" : ".");
num++;
Label_0519:
if (num < length)
{
goto Label_04F5;
}
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_054A:
SharpCompress.Compressor.LZMA.Log.Write(vector3[num] ? "x" : ".");
num++;
Label_056E:
if (num < length)
{
goto Label_054A;
}
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_0585:
SharpCompress.Compressor.LZMA.Log.Write("StartPos:");
if (action2 == null)
{
action2 = delegate (int i, long? startPos) {
db.Files[i].StartPos = startPos;
SharpCompress.Compressor.LZMA.Log.Write(" " + (startPos.HasValue ? startPos.Value.ToString() : "n/a"));
};
}
this.ReadNumberVector(dataVector, capacity, action2);
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_05BC:
SharpCompress.Compressor.LZMA.Log.Write("CTime:");
if (action3 == null)
{
action3 = delegate (int i, DateTime? time) {
db.Files[i].CTime = time;
SharpCompress.Compressor.LZMA.Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
};
}
this.ReadDateTimeVector(dataVector, capacity, action3);
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_05F3:
SharpCompress.Compressor.LZMA.Log.Write("ATime:");
if (action4 == null)
{
action4 = delegate (int i, DateTime? time) {
db.Files[i].ATime = time;
SharpCompress.Compressor.LZMA.Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
};
}
this.ReadDateTimeVector(dataVector, capacity, action4);
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_062A:
SharpCompress.Compressor.LZMA.Log.Write("MTime:");
if (action5 == null)
{
action5 = delegate (int i, DateTime? time) {
db.Files[i].MTime = time;
SharpCompress.Compressor.LZMA.Log.Write(" " + (time.HasValue ? time.Value.ToString() : "n/a"));
};
}
this.ReadDateTimeVector(dataVector, capacity, action5);
SharpCompress.Compressor.LZMA.Log.WriteLine();
goto Label_06B0;
Label_067B:
if (this.ReadByte() != 0)
{
throw new InvalidOperationException();
}
num6 += 1L;
Label_0697:
if (num6 < size)
{
goto Label_067B;
}
goto Label_06B0;
Label_06A5:
this.SkipData(size);
Label_06B0:
if (((db.MajorVersion > 0) || (db.MinorVersion > 2)) && ((this._currentReader.Offset - offset) != size))
{
throw new InvalidOperationException();
}
Label_06FC:
flag2 = true;
goto Label_02DA;
Label_0704:
num7 = 0;
int num8 = 0;
for (num = 0; num < capacity; num++)
{
CFileItem item = db.Files[num];
item.HasStream = !vector[num];
if (item.HasStream)
{
item.IsDir = false;
item.IsAnti = false;
item.Size = list2[num8];
item.Crc = list3[num8];
num8++;
}
else
{
item.IsDir = !vector2[num7];
item.IsAnti = vector3[num7];
num7++;
item.Size = 0L;
item.Crc = null;
}
}
}
finally
{
SharpCompress.Compressor.LZMA.Log.PopIndent();
}
}
public void Extract(ArchiveDatabase _db, int[] indices, IPasswordProvider pw)
{
int count;
bool flag = indices == null;
if (flag)
{
count = _db.Files.Count;
}
else
{
count = indices.Length;
}
if (count != 0)
{
int folderIndex;
int num5;
List<CExtractFolderInfo> source = new List<CExtractFolderInfo>();
for (int i = 0; i < count; i++)
{
int fileIndex = flag ? i : indices[i];
folderIndex = _db.FileIndexToFolderIndexMap[fileIndex];
if (folderIndex == -1)
{
source.Add(new CExtractFolderInfo(fileIndex, -1));
}
else
{
if ((source.Count == 0) || (folderIndex != Enumerable.Last<CExtractFolderInfo>(source).FolderIndex))
{
source.Add(new CExtractFolderInfo(-1, folderIndex));
}
CExtractFolderInfo info = Enumerable.Last<CExtractFolderInfo>(source);
num5 = _db.FolderStartFileIndex[folderIndex];
for (int j = info.ExtractStatuses.Count; j <= (fileIndex - num5); j++)
{
info.ExtractStatuses.Add(j == (fileIndex - num5));
}
}
}
foreach (CExtractFolderInfo info in source)
{
int num10;
bool flag2;
if (info.FileIndex != -1)
{
num5 = info.FileIndex;
}
else
{
num5 = _db.FolderStartFileIndex[info.FolderIndex];
}
FolderUnpackStream stream = new FolderUnpackStream(_db, 0, num5, info.ExtractStatuses);
if (info.FileIndex != -1)
{
continue;
}
folderIndex = info.FolderIndex;
CFolder folder = _db.Folders[folderIndex];
int firstPackStreamId = _db.Folders[folderIndex].FirstPackStreamId;
long folderStreamPos = _db.GetFolderStreamPos(folder, 0);
List<long> list2 = new List<long>();
for (int k = 0; k < folder.PackStreams.Count; k++)
{
list2.Add(_db.PackSizes[firstPackStreamId + k]);
}
Stream stream2 = DecoderStreamHelper.CreateDecoderStream(this._stream, folderStreamPos, list2.ToArray(), folder, pw);
byte[] buffer = new byte[0x1000];
goto Label_0252;
Label_0223:
num10 = stream2.Read(buffer, 0, buffer.Length);
if (num10 == 0)
{
continue;
}
stream.Write(buffer, 0, num10);
Label_0252:
flag2 = true;
goto Label_0223;
}
}
}
private Stream GetCachedDecoderStream(ArchiveDatabase _db, int folderIndex, IPasswordProvider pw)
{
Stream stream;
if (!this._cachedStreams.TryGetValue(folderIndex, out stream))
{
CFolder folder = _db.Folders[folderIndex];
int firstPackStreamId = _db.Folders[folderIndex].FirstPackStreamId;
long folderStreamPos = _db.GetFolderStreamPos(folder, 0);
List<long> list = new List<long>();
for (int i = 0; i < folder.PackStreams.Count; i++)
{
list.Add(_db.PackSizes[firstPackStreamId + i]);
}
stream = DecoderStreamHelper.CreateDecoderStream(this._stream, folderStreamPos, list.ToArray(), folder, pw);
this._cachedStreams.Add(folderIndex, stream);
}
return stream;
}
public ArchiveDatabase ReadDatabase(IPasswordProvider pass)
{
ArchiveDatabase db = new ArchiveDatabase();
db.Clear();
db.MajorVersion = this._header[6];
db.MinorVersion = this._header[7];
if (db.MajorVersion != 0)
{
throw new InvalidOperationException();
}
uint num = DataReader.Get32(this._header, 8);
long num2 = (long) DataReader.Get64(this._header, 12);
long num3 = (long) DataReader.Get64(this._header, 20);
uint num4 = DataReader.Get32(this._header, 0x1c);
uint maxValue = uint.MaxValue;
if (CRC.Finish(CRC.Update(CRC.Update(CRC.Update(maxValue, num2), num3), num4)) != num)
{
throw new InvalidOperationException();
}
db.StartPositionAfterHeader = this._streamOrigin + 0x20L;
if (num3 == 0L)
{
db.Fill();
return db;
}
if (((num2 < 0L) || (num3 < 0L)) || (num3 > 0x7fffffffL))
{
throw new InvalidOperationException();
}
if (num2 > (this._streamEnding - db.StartPositionAfterHeader))
{
throw new IndexOutOfRangeException();
}
this._stream.Seek(num2, SeekOrigin.Current);
byte[] buffer = new byte[num3];
Utils.ReadExact(this._stream, buffer, 0, buffer.Length);
if (CRC.Finish(CRC.Update(uint.MaxValue, buffer, 0, buffer.Length)) != num4)
{
throw new InvalidOperationException();
}
using (CStreamSwitch switch2 = new CStreamSwitch())
{
switch2.Set(this, buffer);
BlockType? nullable = this.ReadId();
if (((BlockType) nullable) != BlockType.Header)
{
if (((BlockType) nullable) != BlockType.EncodedHeader)
{
throw new InvalidOperationException();
}
List<byte[]> list = this.ReadAndDecodePackedStreams(db.StartPositionAfterHeader, pass);
if (list.Count == 0)
{
db.Fill();
return db;
}
if (list.Count != 1)
{
throw new InvalidOperationException();
}
switch2.Set(this, list[0]);
if (((BlockType) this.ReadId()) != BlockType.Header)
{
throw new InvalidOperationException();
}
}
this.ReadHeader(db, pass);
}
db.Fill();
return db;
}
public Stream OpenStream(ArchiveDatabase _db, int fileIndex, IPasswordProvider pw)
{
int folderIndex = _db.FileIndexToFolderIndexMap[fileIndex];
int num2 = _db.NumUnpackStreamsVector[folderIndex];
int num3 = _db.FolderStartFileIndex[folderIndex];
if ((num3 > fileIndex) || ((fileIndex - num3) >= num2))
{
throw new InvalidOperationException();
}
int num4 = fileIndex - num3;
long num5 = 0L;
for (int i = 0; i < num4; i++)
{
num5 += _db.Files[num3 + i].Size;
}
Stream stream = this.GetCachedDecoderStream(_db, folderIndex, pw);
stream.Position = num5;
return new ReadOnlySubStream(stream, _db.Files[fileIndex].Size);
}
