ZRA.NET is a ZStandard Random Access (ZRA) wrapper library for .NET 5.0, written in C#
ZRA allows random access inside an archive compressed using ZStandard

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Format

See ZRA#Format for more info

Usage

Compression

• In-Memory

  byte[] compressedData = Zra.Compress(dataToCompress, compressionLevel: 9, frameSize: 131072);

• Streaming

  using (ZraCompressionStream compressionStream = new ZraCompressionStream(outStream, (ulong)inStream.Length, compressionLevel: 9, frameSize: 131072))
  {
      inStream.CopyTo(compressionStream);
      // You must call Dispose() to write the ZRA header to the output stream.
  }

Decompression (Entire File)

• In-Memory

  byte[] decompressedData = Zra.Decompress(compressedData);

• Streaming

  using (ZraFullDecompressionStream decompressionStream = new ZraFullDecompressionStream(inStream))
  {
      decompressionStream.CopyTo(outStream);
  }

Decompression (Random-Access)

NOTE: offset and count are of the original uncompressed data.

• In-Memory

  byte[] decompressedData = Zra.DecompressSection(compressedData, offset, count);

• Streaming

  using (ZraDecompressionStream decompressionStream = new ZraDecompressionStream(inStream))
  {
      byte[] decompressedSection = new byte[count];
      decompressionStream.Read(decompressedSection, offset, count);
  }

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License

We use a simple 3-clause BSD license located at LICENSE for easy integration into projects while being compatible with the libraries we utilize