// this will eventually disappear once we fully migrate to System.Memory
public static GapStream CreateWriter(
Stream nakedStream, CompressionMethod compressionMethod,
bool leaveNakedOpen)
{
Stream dest;
switch (compressionMethod)
{
case CompressionMethod.Gzip:
dest = new GZipStream(nakedStream, CompressionLevel.Optimal, leaveNakedOpen);
leaveNakedOpen = false;
break;
case CompressionMethod.Snappy:
dest = new SnappyInMemoryStream(nakedStream, CompressionMode.Compress);
leaveNakedOpen = false;
break;
case CompressionMethod.None:
dest = nakedStream;
break;
default:
throw new NotImplementedException($"unknown compression method {compressionMethod}");
}
return(new GapStream(dest, leaveOpen: leaveNakedOpen));
}
public void Compress_decompress_random_byte_chunks()
{
byte[] stage1 = RandomGenerator.GetRandomBytes(2, 1000);
byte[] stage2;
byte[] stage3;
using (var source = new MemoryStream())
{
using (var snappy = new SnappyInMemoryStream(source, CompressionMode.Compress))
{
snappy.Write(stage1, 0, stage1.Length);
snappy.MarkWriteFinished();
}
stage2 = source.ToArray();
}
using (var source = new MemoryStream(stage2))
{
using (var snappy = new SnappyInMemoryStream(source, CompressionMode.Decompress))
{
using (var ms = new MemoryStream())
{
snappy.CopyTo(ms);
stage3 = ms.ToArray();
}
}
}
// validate
Assert.Equal(stage1, stage3);
}
// this will eventually disappear once we fully migrate to System.Memory
public static GapStream CreateWriter(
Stream nakedStream,
CompressionMethod compressionMethod, int compressionLevel,
bool leaveNakedOpen)
{
Stream dest;
/*#if !NET14
* nakedStream = new BufferedStream(nakedStream); //optimise writer performance
#endif*/
switch (compressionMethod)
{
case CompressionMethod.Gzip:
dest = new GZipStream(nakedStream, ToGzipCompressionLevel(compressionLevel), leaveNakedOpen);
leaveNakedOpen = false;
break;
case CompressionMethod.Snappy:
dest = new SnappyInMemoryStream(nakedStream, CompressionMode.Compress);
leaveNakedOpen = false;
break;
case CompressionMethod.None:
dest = nakedStream;
break;
default:
throw new NotImplementedException($"unknown compression method {compressionMethod}");
}
return(new GapStream(dest, leaveOpen: leaveNakedOpen));
}
#pragma warning disable xUnit1026 // Theory methods should use all of their parameters
public void Compress_decompress_random_byte_chunks(int index)
#pragma warning restore xUnit1026 // Theory methods should use all of their parameters
{
byte[] stage1 = RandomGenerator.GetRandomBytes(2, 1000);
byte[] stage2;
byte[] stage3;
using (var source = new MemoryStream())
{
using (var snappy = new SnappyInMemoryStream(source, CompressionMode.Compress))
{
snappy.Write(stage1, 0, stage1.Length);
snappy.MarkWriteFinished();
}
stage2 = source.ToArray();
}
using (var source = new MemoryStream(stage2))
{
using (var snappy = new SnappyInMemoryStream(source, CompressionMode.Decompress))
{
using (var ms = new MemoryStream())
{
snappy.CopyTo(ms);
stage3 = ms.ToArray();
}
}
}
// validate
Assert.Equal(stage1, stage3);
}
public static Stream CreateReader(Stream nakedStream, CompressionMethod compressionMethod, long knownLength)
{
Stream dest = nakedStream;
switch (compressionMethod)
{
case CompressionMethod.Gzip:
dest = new GZipStream(nakedStream, CompressionMode.Decompress, false);
break;
case CompressionMethod.Snappy:
dest = new SnappyInMemoryStream(nakedStream, CompressionMode.Decompress);
break;
case CompressionMethod.None:
dest = nakedStream;
break;
default:
throw new NotImplementedException($"unknown compression method {compressionMethod}");
}
return(new GapStream(dest, knownLength));
}
