private ArchivedFile.Builder AddFile(List <ArchivedItem.Builder> items, string fullName, string name)
{
RemoveItem(items, name);
var file = new ArchivedFile.Builder();
file.FullName = fullName;
file.Name = name;
items.Add(file);
mFiles.Add(file);
return(file);
}
private void RemoveItem(ArchivedFile.Builder file)
{
mFiles.Remove(file);
}
public ArchiveFileModel ReadMetadata(Stream stream, PasswordStorage password)
{
if (mIsRunning)
{
throw new InvalidOperationException("Recursive invocation.");
}
try
{
mIsRunning = true;
// reset fields to detect bugs
mFileNames = null;
mItemsWithoutStreamMarkers = null;
mEmptyFileMarkers = null;
mDeletionMarkers = null;
mOffsets = null;
mAttributes = null;
mCDates = null;
mMDates = null;
mADates = null;
mItemCount = -1;
mItemsWithoutStream = -1;
var metadata = ReadMetadataCore(stream, password);
mRootFolder = new ArchivedFolder.Builder();
mItemMap = new Dictionary <ArchivedFolder.Builder, List <ArchivedItem.Builder> >();
mItemMap.Add(mRootFolder, new List <ArchivedItem.Builder>());
mFiles = new HashSet <ArchivedFile.Builder>();
mStreamMap = new List <ArchivedFile.Builder>();
mSectionMap = ImmutableArray.CreateBuilder <int>(metadata.DecoderSections.Length + 1);
ArchiveDecoderSection currentDecoder = null;
int currentSectionIndex = -1;
int currentStreamIndex = 0;
int currentStreamCount = 0;
int currentEmptyIndex = 0;
for (int currentFileIndex = 0; currentFileIndex < mFileNames.Count; currentFileIndex++)
{
var filename = mFileNames[currentFileIndex];
bool hasStream = false;
ArchivedFile.Builder file = null;
if (mItemsWithoutStreamMarkers != null && mItemsWithoutStreamMarkers[currentFileIndex])
{
var isFile = (mEmptyFileMarkers == null || mEmptyFileMarkers[currentEmptyIndex]);
var isDeletionMarker = (mDeletionMarkers != null && mDeletionMarkers[currentEmptyIndex]);
if (isDeletionMarker)
{
RemoveItem(mItemMap[mRootFolder], filename, 0);
}
else
{
file = AddItem(mItemMap[mRootFolder], filename, 0, isFile);
}
currentEmptyIndex++;
}
else
{
hasStream = true;
file = AddItem(mItemMap[mRootFolder], filename, 0, true);
}
if (file != null)
{
if (mOffsets != null)
{
file.Offset = mOffsets[currentFileIndex] ?? 0;
}
if (mAttributes != null)
{
var attr = mAttributes[currentFileIndex];
if (attr.HasValue && (attr.Value & ArchivedAttributesExtensions.DirectoryAttribute) != 0)
{
continue;
}
file.Attributes = attr;
}
if (mCDates != null)
{
file.Creation = mCDates[currentFileIndex];
}
if (mMDates != null)
{
file.LastWrite = mMDates[currentFileIndex];
}
if (mADates != null)
{
file.LastAccess = mADates[currentFileIndex];
}
if (hasStream)
{
while (currentStreamIndex == currentStreamCount)
{
if (currentSectionIndex == metadata.DecoderSections.Length - 1)
{
throw new InvalidDataException();
}
currentDecoder = metadata.DecoderSections[++currentSectionIndex];
currentStreamCount = currentDecoder.Streams.Length;
currentStreamIndex = 0;
mSectionMap.Add(mStreamMap.Count);
}
file.Stream = new DecodedStreamIndex(currentSectionIndex, currentStreamIndex);
var streamMetadata = currentDecoder.Streams[currentStreamIndex++];
file.Length = streamMetadata.Length;
file.Checksum = streamMetadata.Checksum;
}
}
if (hasStream)
{
mStreamMap.Add(file);
}
}
var finalStreamMap = ImmutableList.CreateBuilder <ArchivedFile>();
foreach (var file in mStreamMap)
{
finalStreamMap.Add(mFiles.Contains(file) ? file.ToImmutable() : null);
}
if (currentStreamIndex != currentStreamCount || currentSectionIndex != metadata.DecoderSections.Length - 1)
{
throw new InvalidDataException();
}
mSectionMap.Add(finalStreamMap.Count);
return(new ArchiveFileModel(metadata, BuildFolder(mRootFolder), mSectionMap.MoveToImmutable(), finalStreamMap.ToImmutable()));
}
finally
{
mIsRunning = false;
}
}