106 lines
3.2 KiB
C#
106 lines
3.2 KiB
C#
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using System;
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using System.IO;
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#if GZIP
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using SharpCompress.Archive.GZip;
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#endif
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#if RAR
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using SharpCompress.Archive.Rar;
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#endif
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#if TAR
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using SharpCompress.Archive.Tar;
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#endif
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using SharpCompress.Archive.Zip;
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using SharpCompress.Common;
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using SharpCompress.Compressor;
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#if BZIP2
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using SharpCompress.Compressor.BZip2;
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#endif
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using SharpCompress.IO;
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#if GZIP
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using SharpCompress.Reader.GZip;
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#endif
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#if RAR
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using SharpCompress.Reader.Rar;
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#endif
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#if TAR
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using SharpCompress.Reader.Tar;
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#endif
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using SharpCompress.Reader.Zip;
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#if DEFLATE
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using GZipStream = SharpCompress.Compressor.Deflate.GZipStream;
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#endif
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namespace SharpCompress.Reader
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{
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internal static class ReaderFactory
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{
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/// <summary>
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/// Opens a Reader for Non-seeking usage
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/// </summary>
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/// <param name="stream"></param>
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/// <param name="options"></param>
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/// <returns></returns>
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public static IReader Open(Stream stream, Options options = Options.KeepStreamsOpen)
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{
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stream.CheckNotNull("stream");
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RewindableStream rewindableStream = new RewindableStream(stream);
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rewindableStream.StartRecording();
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if (ZipArchive.IsZipFile(rewindableStream, null))
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{
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rewindableStream.Rewind(true);
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return ZipReader.Open(rewindableStream, null, options);
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}
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#if GZIP
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rewindableStream.Rewind(false);
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if (GZipArchive.IsGZipFile(rewindableStream))
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{
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rewindableStream.Rewind(false);
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GZipStream testStream = new GZipStream(rewindableStream, CompressionMode.Decompress);
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if (TarArchive.IsTarFile(testStream))
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{
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rewindableStream.Rewind(true);
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return new TarReader(rewindableStream, CompressionType.GZip, options);
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}
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rewindableStream.Rewind(true);
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return GZipReader.Open(rewindableStream, options);
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}
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#endif
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#if BZIP2
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rewindableStream.Rewind(false);
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if (BZip2Stream.IsBZip2(rewindableStream))
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{
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rewindableStream.Rewind(false);
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BZip2Stream testStream = new BZip2Stream(rewindableStream, CompressionMode.Decompress, false);
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#if TAR
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if (TarArchive.IsTarFile(testStream))
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{
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rewindableStream.Rewind(true);
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return new TarReader(rewindableStream, CompressionType.BZip2, options);
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}
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#endif
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}
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#endif
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#if TAR
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rewindableStream.Rewind(false);
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if (TarArchive.IsTarFile(rewindableStream))
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{
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rewindableStream.Rewind(true);
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return TarReader.Open(rewindableStream, options);
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}
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#endif
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#if RAR
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rewindableStream.Rewind(false);
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if (RarArchive.IsRarFile(rewindableStream, options))
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{
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rewindableStream.Rewind(true);
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return RarReader.Open(rewindableStream, options);
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}
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#endif
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throw new InvalidOperationException("Cannot determine compressed stream type. Supported Reader Formats: Zip, GZip, BZip2, Tar, Rar");
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}
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}
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}
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