internal ZipArchiveEntry(ZipArchive archive, ZipCentralDirectoryFileHeader cd)
{
this._archive = archive;
this._originallyInArchive = true;
this._diskNumberStart = cd.DiskNumberStart;
this._versionToExtract = (ZipVersionNeededValues)cd.VersionNeededToExtract;
this._generalPurposeBitFlag = (ZipArchiveEntry.BitFlagValues)cd.GeneralPurposeBitFlag;
this.CompressionMethod = (ZipArchiveEntry.CompressionMethodValues)cd.CompressionMethod;
this._lastModified = new DateTimeOffset(ZipHelper.DosTimeToDateTime(cd.LastModified));
this._compressedSize = cd.CompressedSize;
this._uncompressedSize = cd.UncompressedSize;
this._offsetOfLocalHeader = cd.RelativeOffsetOfLocalHeader;
this._storedOffsetOfCompressedData = new long?();
this._crc32 = cd.Crc32;
this._compressedBytes = null;
this._storedUncompressedData = null;
this._currentlyOpenForWrite = false;
this._everOpenedForWrite = false;
this._outstandingWriteStream = null;
this.FullName = this.DecodeEntryName(cd.Filename);
this._lhUnknownExtraFields = null;
this._cdUnknownExtraFields = cd.ExtraFields;
this._fileComment = cd.FileComment;
this._externalFileAttributes = cd.ExternalFileAttributes;
}
private void ReadCentralDirectory()
{
try
{
this._archiveStream.Seek(this._centralDirectoryStart, SeekOrigin.Begin);
long num = 0L;
bool saveExtraFieldsAndComments = this.Mode == ZipArchiveMode.Update;
ZipCentralDirectoryFileHeader header;
while (ZipCentralDirectoryFileHeader.TryReadBlock(this._archiveReader, saveExtraFieldsAndComments, out header))
{
this.AddEntry(new ZipArchiveEntry(this, header));
++num;
}
if (num != this._expectedNumberOfEntries)
{
throw new InvalidDataException(CompressionConstants.NumEntriesWrong);
}
}
catch (EndOfStreamException ex)
{
throw new InvalidDataException(CompressionConstants.CentralDirectoryInvalid, (Exception)ex);
}
}
public static bool TryReadBlock(BinaryReader reader, bool saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
header = new ZipCentralDirectoryFileHeader();
if (reader.ReadUInt32() != 33639248u)
{
return(false);
}
header.VersionMadeBy = reader.ReadUInt16();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
uint num = reader.ReadUInt32();
uint num2 = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
ushort num3 = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
uint num4 = reader.ReadUInt32();
header.Filename = reader.ReadBytes((int)header.FilenameLength);
bool readUncompressedSize = num2 == 4294967295u;
bool readCompressedSize = num == 4294967295u;
bool readLocalHeaderOffset = num4 == 4294967295u;
bool readStartDiskNumber = num3 == 65535;
long position = reader.BaseStream.Position + (long)((ulong)header.ExtraFieldLength);
Zip64ExtraField zip64ExtraField;
using (Stream stream = new SubReadStream(reader.BaseStream, reader.BaseStream.Position, (long)((ulong)header.ExtraFieldLength)))
{
if (saveExtraFieldsAndComments)
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(stream);
zip64ExtraField = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields, readUncompressedSize, readCompressedSize, readLocalHeaderOffset, readStartDiskNumber);
}
else
{
header.ExtraFields = null;
zip64ExtraField = Zip64ExtraField.GetJustZip64Block(stream, readUncompressedSize, readCompressedSize, readLocalHeaderOffset, readStartDiskNumber);
}
}
ZipHelper.AdvanceToPosition(reader.BaseStream, position);
if (saveExtraFieldsAndComments)
{
header.FileComment = reader.ReadBytes((int)header.FileCommentLength);
}
else
{
reader.BaseStream.Position += (long)((ulong)header.FileCommentLength);
header.FileComment = null;
}
header.UncompressedSize = (long)((!zip64ExtraField.UncompressedSize.HasValue) ? ((ulong)num2) : ((ulong)zip64ExtraField.UncompressedSize.Value));
header.CompressedSize = (long)((!zip64ExtraField.CompressedSize.HasValue) ? ((ulong)num) : ((ulong)zip64ExtraField.CompressedSize.Value));
header.RelativeOffsetOfLocalHeader = (long)((!zip64ExtraField.LocalHeaderOffset.HasValue) ? ((ulong)num4) : ((ulong)zip64ExtraField.LocalHeaderOffset.Value));
header.DiskNumberStart = ((!zip64ExtraField.StartDiskNumber.HasValue) ? ((int)num3) : zip64ExtraField.StartDiskNumber.Value);
return(true);
}
public static bool TryReadBlock(BinaryReader reader, bool saveExtraFieldsAndComments, out ZipCentralDirectoryFileHeader header)
{
header = new ZipCentralDirectoryFileHeader();
if ((int)reader.ReadUInt32() != 33639248)
{
return(false);
}
header.VersionMadeBy = reader.ReadUInt16();
header.VersionNeededToExtract = reader.ReadUInt16();
header.GeneralPurposeBitFlag = reader.ReadUInt16();
header.CompressionMethod = reader.ReadUInt16();
header.LastModified = reader.ReadUInt32();
header.Crc32 = reader.ReadUInt32();
uint num1 = reader.ReadUInt32();
uint num2 = reader.ReadUInt32();
header.FilenameLength = reader.ReadUInt16();
header.ExtraFieldLength = reader.ReadUInt16();
header.FileCommentLength = reader.ReadUInt16();
ushort num3 = reader.ReadUInt16();
header.InternalFileAttributes = reader.ReadUInt16();
header.ExternalFileAttributes = reader.ReadUInt32();
uint num4 = reader.ReadUInt32();
header.FileName = reader.ReadBytes((int)header.FilenameLength);
bool readUncompressedSize = (int)num2 == -1;
bool readCompressedSize = (int)num1 == -1;
bool readLocalHeaderOffset = (int)num4 == -1;
bool readStartDiskNumber = (int)num3 == (int)ushort.MaxValue;
Zip64ExtraField zip64ExtraField;
using (Stream stream = (Stream) new SubReadStream(reader.BaseStream, reader.BaseStream.Position, (long)header.ExtraFieldLength))
{
if (saveExtraFieldsAndComments)
{
header.ExtraFields = ZipGenericExtraField.ParseExtraField(stream);
zip64ExtraField = Zip64ExtraField.GetAndRemoveZip64Block(header.ExtraFields, readUncompressedSize, readCompressedSize, readLocalHeaderOffset, readStartDiskNumber);
}
else
{
header.ExtraFields = (List <ZipGenericExtraField>)null;
zip64ExtraField = Zip64ExtraField.GetJustZip64Block(stream, readUncompressedSize, readCompressedSize, readLocalHeaderOffset, readStartDiskNumber);
}
}
if (saveExtraFieldsAndComments)
{
header.FileComment = reader.ReadBytes((int)header.FileCommentLength);
}
else
{
reader.BaseStream.Position += (long)header.FileCommentLength;
header.FileComment = (byte[])null;
}
header.UncompressedSize = !zip64ExtraField.UncompressedSize.HasValue ? (long)num2 : zip64ExtraField.UncompressedSize.Value;
header.CompressedSize = !zip64ExtraField.CompressedSize.HasValue ? (long)num1 : zip64ExtraField.CompressedSize.Value;
header.RelativeOffsetOfLocalHeader = !zip64ExtraField.LocalHeaderOffset.HasValue ? (long)num4 : zip64ExtraField.LocalHeaderOffset.Value;
header.DiskNumberStart = !zip64ExtraField.StartDiskNumber.HasValue ? (int)num3 : zip64ExtraField.StartDiskNumber.Value;
return(true);
}