public void TestIncompleteRewind()
{
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(1);
bw.Write(2);
bw.Write(3);
bw.Write(4);
bw.Write(5);
bw.Write(6);
bw.Write(7);
bw.Flush();
ms.Position = 0;
RewindableStream stream = new RewindableStream(ms);
stream.StartRecording();
BinaryReader br = new BinaryReader(stream);
Assert.AreEqual(br.ReadInt32(), 1);
Assert.AreEqual(br.ReadInt32(), 2);
Assert.AreEqual(br.ReadInt32(), 3);
Assert.AreEqual(br.ReadInt32(), 4);
stream.Rewind(true);
Assert.AreEqual(br.ReadInt32(), 1);
Assert.AreEqual(br.ReadInt32(), 2);
stream.StartRecording();
Assert.AreEqual(br.ReadInt32(), 3);
Assert.AreEqual(br.ReadInt32(), 4);
Assert.AreEqual(br.ReadInt32(), 5);
stream.Rewind(true);
Assert.AreEqual(br.ReadInt32(), 3);
Assert.AreEqual(br.ReadInt32(), 4);
Assert.AreEqual(br.ReadInt32(), 5);
Assert.AreEqual(br.ReadInt32(), 6);
Assert.AreEqual(br.ReadInt32(), 7);
}
/// <summary>
/// Opens a Reader for Non-seeking usage
/// </summary>
/// <param name="stream"></param>
/// <param name="options"></param>
/// <returns></returns>
public static IReader Open(Stream stream, Options options = Options.KeepStreamsOpen)
{
stream.CheckNotNull("stream");
RewindableStream rewindableStream = new RewindableStream(stream);
rewindableStream.StartRecording();
if (ZipArchive.IsZipFile(rewindableStream, null))
{
rewindableStream.Rewind(true);
return ZipReader.Open(rewindableStream, null, options);
}
rewindableStream.Rewind(false);
if (GZipArchive.IsGZipFile(rewindableStream))
{
rewindableStream.Rewind(false);
GZipStream testStream = new GZipStream(rewindableStream, CompressionMode.Decompress);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return new TarReader(rewindableStream, CompressionType.GZip, options);
}
rewindableStream.Rewind(true);
return GZipReader.Open(rewindableStream, options);
}
rewindableStream.Rewind(false);
if (BZip2Stream.IsBZip2(rewindableStream))
{
rewindableStream.Rewind(false);
BZip2Stream testStream = new BZip2Stream(rewindableStream, CompressionMode.Decompress, false);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return new TarReader(rewindableStream, CompressionType.BZip2, options);
}
}
rewindableStream.Rewind(false);
if (TarArchive.IsTarFile(rewindableStream))
{
rewindableStream.Rewind(true);
return TarReader.Open(rewindableStream, options);
}
rewindableStream.Rewind(false);
if (RarArchive.IsRarFile(rewindableStream, options))
{
rewindableStream.Rewind(true);
return RarReader.Open(rewindableStream, options);
}
throw new InvalidOperationException("Cannot determine compressed stream type.");
}
public static IReader Open(Stream stream, Options options)
{
Utility.CheckNotNull(stream, "stream");
RewindableStream stream2 = new RewindableStream(stream);
stream2.StartRecording();
if (ZipArchive.IsZipFile(stream2, null))
{
stream2.Rewind(true);
return ZipReader.Open(stream2, null, options);
}
stream2.Rewind(false);
if (GZipArchive.IsGZipFile(stream2))
{
stream2.Rewind(false);
GZipStream stream3 = new GZipStream(stream2, CompressionMode.Decompress);
if (TarArchive.IsTarFile(stream3))
{
stream2.Rewind(true);
return new TarReader(stream2, CompressionType.GZip, options);
}
stream2.Rewind(true);
return GZipReader.Open(stream2, options);
}
stream2.Rewind(false);
if (BZip2Stream.IsBZip2(stream2))
{
stream2.Rewind(false);
BZip2Stream stream4 = new BZip2Stream(stream2, CompressionMode.Decompress, false, false);
if (TarArchive.IsTarFile(stream4))
{
stream2.Rewind(true);
return new TarReader(stream2, CompressionType.BZip2, options);
}
}
stream2.Rewind(false);
if (TarArchive.IsTarFile(stream2))
{
stream2.Rewind(true);
return TarReader.Open(stream2, options);
}
stream2.Rewind(false);
if (!RarArchive.IsRarFile(stream2, options))
{
throw new InvalidOperationException("Cannot determine compressed stream type. Supported Reader Formats: Zip, GZip, BZip2, Tar, Rar");
}
stream2.Rewind(true);
return RarReader.Open(stream2, options);
}
