internal static ZipIOLocalFileHeader ParseRecord(BinaryReader reader, Encoding encoding)
{
ZipIOLocalFileHeader header = new ZipIOLocalFileHeader();
header._signature = reader.ReadUInt32();
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._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;
}
}
header._extraField = ZipIOExtraField.ParseRecord(reader, none, header._extraFieldLength);
header._stringFileName = ZipIOBlockManager.ValidateNormalizeFileName(encoding.GetString(header._fileName));
header.Validate();
return(header);
}
internal ZipFileInfo AddFile(string zipFileName, CompressionMethodEnum compressionMethod, DeflateOptionEnum deflateOption)
{
this.CheckDisposed();
if (this._openAccess == FileAccess.Read)
{
throw new InvalidOperationException(SR.Get("CanNotWriteInReadOnlyMode"));
}
zipFileName = ZipIOBlockManager.ValidateNormalizeFileName(zipFileName);
if ((compressionMethod != CompressionMethodEnum.Stored) && (compressionMethod != CompressionMethodEnum.Deflated))
{
throw new ArgumentOutOfRangeException("compressionMethod");
}
if ((deflateOption < DeflateOptionEnum.Normal) || ((deflateOption > DeflateOptionEnum.SuperFast) && (deflateOption != DeflateOptionEnum.None)))
{
throw new ArgumentOutOfRangeException("deflateOption");
}
if (this.FileExists(zipFileName))
{
throw new InvalidOperationException(SR.Get("AttemptedToCreateDuplicateFileName"));
}
ZipIOLocalFileBlock fileBlock = this._blockManager.CreateLocalFileBlock(zipFileName, compressionMethod, deflateOption);
ZipFileInfo info = new ZipFileInfo(this, fileBlock);
this.ZipFileInfoDictionary.Add(info.Name, info);
return(info);
}
internal void DeleteFile(string zipFileName)
{
this.CheckDisposed();
if (this._openAccess == FileAccess.Read)
{
throw new InvalidOperationException(SR.Get("CanNotWriteInReadOnlyMode"));
}
zipFileName = ZipIOBlockManager.ValidateNormalizeFileName(zipFileName);
if (this.FileExists(zipFileName))
{
ZipFileInfo file = this.GetFile(zipFileName);
this.ZipFileInfoDictionary.Remove(zipFileName);
this._blockManager.RemoveLocalFileBlock(file.LocalFileBlock);
}
}
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);
}
internal ZipFileInfo GetFile(string zipFileName)
{
this.CheckDisposed();
if (this._openAccess == FileAccess.Write)
{
throw new InvalidOperationException(SR.Get("CanNotReadInWriteOnlyMode"));
}
zipFileName = ZipIOBlockManager.ValidateNormalizeFileName(zipFileName);
if (this.ZipFileInfoDictionary.Contains(zipFileName))
{
return((ZipFileInfo)this.ZipFileInfoDictionary[zipFileName]);
}
if (!this.FileExists(zipFileName))
{
throw new InvalidOperationException(SR.Get("FileDoesNotExists"));
}
ZipIOLocalFileBlock fileBlock = this._blockManager.LoadLocalFileBlock(zipFileName);
ZipFileInfo info = new ZipFileInfo(this, fileBlock);
this.ZipFileInfoDictionary.Add(info.Name, info);
return(info);
}
internal bool FileExists(string zipFileName)
{
this.CheckDisposed();
zipFileName = ZipIOBlockManager.ValidateNormalizeFileName(zipFileName);
return(this._blockManager.CentralDirectoryBlock.FileExists(zipFileName));
}
