45 lines
1.3 KiB
C#
45 lines
1.3 KiB
C#
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using System.IO;
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using SharpCompress.Common.Zip.Headers;
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namespace SharpCompress.Common.Zip
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{
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internal class SeekableZipFilePart : ZipFilePart
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{
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private bool isLocalHeaderLoaded;
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private readonly SeekableZipHeaderFactory headerFactory;
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internal SeekableZipFilePart(SeekableZipHeaderFactory headerFactory, DirectoryEntryHeader header, Stream stream)
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: base(header, stream)
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{
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this.headerFactory = headerFactory;
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}
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internal override Stream GetCompressedStream()
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{
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if (!isLocalHeaderLoaded)
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{
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LoadLocalHeader();
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isLocalHeaderLoaded = true;
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}
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return base.GetCompressedStream();
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}
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internal string Comment
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{
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get { return (Header as DirectoryEntryHeader).Comment; }
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}
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private void LoadLocalHeader()
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{
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bool hasData = Header.HasData;
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Header = headerFactory.GetLocalHeader(BaseStream, Header as DirectoryEntryHeader);
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Header.HasData = hasData;
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}
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protected override Stream CreateBaseStream()
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{
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BaseStream.Position = Header.DataStartPosition.Value;
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return BaseStream;
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}
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}
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}
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