internal void AddFileBlock(ZipIOLocalFileBlock fileBlock)
{
this._dirtyFlag = true;
ZipIOCentralDirectoryFileHeader header = ZipIOCentralDirectoryFileHeader.CreateNew(this._blockManager.Encoding, fileBlock);
this.CentralDirectoryDictionary.Add(header.FileName, header);
}
public void UpdateReferences(bool closingFlag)
{
foreach (IZipIOBlock block3 in (IEnumerable)this._blockManager)
{
ZipIOLocalFileBlock fileBlock = block3 as ZipIOLocalFileBlock;
ZipIORawDataFileBlock block = block3 as ZipIORawDataFileBlock;
if (fileBlock != null)
{
ZipIOCentralDirectoryFileHeader header2 = (ZipIOCentralDirectoryFileHeader)this.CentralDirectoryDictionary[fileBlock.FileName];
if (header2.UpdateIfNeeded(fileBlock))
{
this._dirtyFlag = true;
}
}
else if (block != null)
{
long diskImageShift = block.DiskImageShift;
if (diskImageShift != 0L)
{
foreach (ZipIOCentralDirectoryFileHeader header in this.CentralDirectoryDictionary.Values)
{
if (block.DiskImageContains(header.OffsetOfLocalHeader))
{
header.MoveReference(diskImageShift);
this._dirtyFlag = true;
}
}
continue;
}
}
}
}
internal static ZipIOLocalFileBlock SeekableLoad(ZipIOBlockManager blockManager, string fileName)
{
ZipIOCentralDirectoryBlock centralDirectoryBlock = blockManager.CentralDirectoryBlock;
ZipIOCentralDirectoryFileHeader centralDirectoryFileHeader = centralDirectoryBlock.GetCentralDirectoryFileHeader(fileName);
long offsetOfLocalHeader = centralDirectoryFileHeader.OffsetOfLocalHeader;
bool folderFlag = centralDirectoryFileHeader.FolderFlag;
bool volumeLabelFlag = centralDirectoryFileHeader.VolumeLabelFlag;
blockManager.Stream.Seek(offsetOfLocalHeader, SeekOrigin.Begin);
ZipIOLocalFileBlock block = new ZipIOLocalFileBlock(blockManager, folderFlag, volumeLabelFlag);
block.ParseRecord(blockManager.BinaryReader, fileName, offsetOfLocalHeader, centralDirectoryBlock, centralDirectoryFileHeader);
return(block);
}
internal static ZipIOCentralDirectoryFileHeader CreateNew(Encoding encoding, ZipIOLocalFileBlock fileBlock)
{
ZipIOCentralDirectoryFileHeader header = new ZipIOCentralDirectoryFileHeader(encoding);
header._fileCommentLength = 0;
header._fileComment = null;
header._diskNumberStart = 0;
header._internalFileAttributes = 0;
header._externalFileAttributes = 0;
header._versionMadeBy = 0x2d;
header._extraField = ZipIOExtraField.CreateNew(false);
header.UpdateFromLocalFileBlock(fileBlock);
return(header);
}
// Methods
int IComparer.Compare(object o1, object o2)
{
ZipIOCentralDirectoryFileHeader header2 = o1 as ZipIOCentralDirectoryFileHeader;
ZipIOCentralDirectoryFileHeader header = o2 as ZipIOCentralDirectoryFileHeader;
if (header2.OffsetOfLocalHeader > header.OffsetOfLocalHeader)
{
return(1);
}
if (header2.OffsetOfLocalHeader < header.OffsetOfLocalHeader)
{
return(-1);
}
return(0);
}
internal static ZipIOCentralDirectoryFileHeader ParseRecord(BinaryReader reader, Encoding encoding)
{
ZipIOCentralDirectoryFileHeader header = new ZipIOCentralDirectoryFileHeader(encoding);
header._signature = reader.ReadUInt32();
header._versionMadeBy = reader.ReadUInt16();
header._versionNeededToExtract = reader.ReadUInt16();
header._generalPurposeBitFlag = reader.ReadUInt16();
header._compressionMethod = reader.ReadUInt16();
header._lastModFileDateTime = reader.ReadUInt32();
header._crc32 = reader.ReadUInt32();
header._compressedSize = reader.ReadUInt32();
header._uncompressedSize = reader.ReadUInt32();
header._fileNameLength = reader.ReadUInt16();
header._extraFieldLength = reader.ReadUInt16();
header._fileCommentLength = reader.ReadUInt16();
header._diskNumberStart = reader.ReadUInt16();
header._internalFileAttributes = reader.ReadUInt16();
header._externalFileAttributes = reader.ReadUInt32();
header._relativeOffsetOfLocalHeader = reader.ReadUInt32();
header._fileName = reader.ReadBytes(header._fileNameLength);
ZipIOZip64ExtraFieldUsage none = ZipIOZip64ExtraFieldUsage.None;
if (header._versionNeededToExtract >= 0x2d)
{
if (header._compressedSize == uint.MaxValue)
{
none |= ZipIOZip64ExtraFieldUsage.CompressedSize;
}
if (header._uncompressedSize == uint.MaxValue)
{
none |= ZipIOZip64ExtraFieldUsage.UncompressedSize;
}
if (header._relativeOffsetOfLocalHeader == uint.MaxValue)
{
none |= ZipIOZip64ExtraFieldUsage.OffsetOfLocalHeader;
}
if (header._diskNumberStart == 0xffff)
{
none |= ZipIOZip64ExtraFieldUsage.DiskNumber;
}
}
header._extraField = ZipIOExtraField.ParseRecord(reader, none, header._extraFieldLength);
header._fileComment = reader.ReadBytes(header._fileCommentLength);
header._stringFileName = ZipIOBlockManager.ValidateNormalizeFileName(encoding.GetString(header._fileName));
header.Validate();
return(header);
}
private void ParseRecord(BinaryReader reader, long centralDirectoryOffset, int centralDirectoryCount, long expectedCentralDirectorySize)
{
if (centralDirectoryCount > 0)
{
SortedList list = new SortedList(centralDirectoryCount);
for (int i = 0; i < centralDirectoryCount; i++)
{
ZipIOCentralDirectoryFileHeader header2 = ZipIOCentralDirectoryFileHeader.ParseRecord(reader, this._blockManager.Encoding);
list.Add(header2.OffsetOfLocalHeader, header2);
}
if ((reader.BaseStream.Position - centralDirectoryOffset) > expectedCentralDirectorySize)
{
throw new FileFormatException(SR.Get("CorruptedData"));
}
foreach (ZipIOCentralDirectoryFileHeader header in list.Values)
{
this.CentralDirectoryDictionary.Add(header.FileName, header);
}
this._centralDirectoryDigitalSignature = ZipIOCentralDirectoryDigitalSignature.ParseRecord(reader);
}
this._offset = centralDirectoryOffset;
this._dirtyFlag = false;
this.Validate(expectedCentralDirectorySize);
}
private void Validate(string fileName, ZipIOCentralDirectoryBlock centralDir, ZipIOCentralDirectoryFileHeader centralDirFileHeader)
{
if (string.CompareOrdinal(this._localFileHeader.FileName, fileName) != 0)
{
throw new FileFormatException(SR.Get("CorruptedData"));
}
if ((((this.VersionNeededToExtract != centralDirFileHeader.VersionNeededToExtract) || (this.GeneralPurposeBitFlag != centralDirFileHeader.GeneralPurposeBitFlag)) || ((this.CompressedSize != centralDirFileHeader.CompressedSize) || (this.UncompressedSize != centralDirFileHeader.UncompressedSize))) || ((this.CompressionMethod != centralDirFileHeader.CompressionMethod) || (this.Crc32 != centralDirFileHeader.Crc32)))
{
throw new FileFormatException(SR.Get("CorruptedData"));
}
if ((this.Offset + this.Size) > centralDir.Offset)
{
throw new FileFormatException(SR.Get("CorruptedData"));
}
}
private void ParseRecord(BinaryReader reader, string fileName, long position, ZipIOCentralDirectoryBlock centralDir, ZipIOCentralDirectoryFileHeader centralDirFileHeader)
{
this.CheckDisposed();
this._localFileHeader = ZipIOLocalFileHeader.ParseRecord(reader, this._blockManager.Encoding);
if (this._localFileHeader.StreamingCreationFlag)
{
this._blockManager.Stream.Seek(centralDirFileHeader.CompressedSize, SeekOrigin.Current);
this._localFileDataDescriptor = ZipIOLocalFileDataDescriptor.ParseRecord(reader, centralDirFileHeader.CompressedSize, centralDirFileHeader.UncompressedSize, centralDirFileHeader.Crc32, this._localFileHeader.VersionNeededToExtract);
}
else
{
this._localFileDataDescriptor = null;
}
this._offset = position;
this._dirtyFlag = false;
this._fileItemStream = new ZipIOFileItemStream(this._blockManager, this, position + this._localFileHeader.Size, centralDirFileHeader.CompressedSize);
if (this._localFileHeader.CompressionMethod == CompressionMethodEnum.Deflated)
{
this._deflateStream = new CompressStream(this._fileItemStream, centralDirFileHeader.UncompressedSize);
this._crcCalculatingStream = new ProgressiveCrcCalculatingStream(this._blockManager, this._deflateStream, this.Crc32);
}
else
{
if (this._localFileHeader.CompressionMethod != CompressionMethodEnum.Stored)
{
throw new NotSupportedException(SR.Get("ZipNotSupportedCompressionMethod"));
}
this._crcCalculatingStream = new ProgressiveCrcCalculatingStream(this._blockManager, this._fileItemStream, this.Crc32);
}
this.Validate(fileName, centralDir, centralDirFileHeader);
}
