public void round_trip_returns_original_data(string fileName)
{
byte[] uncompressed = File.ReadAllBytes(fileName);
var target = new SnappyCompressor();
var result = new byte[target.MaxCompressedLength(uncompressed.Length)];
int size = target.Compress(uncompressed, 0, uncompressed.Length, result);
var target2 = new SnappyDecompressor();
var sizes = target2.ReadUncompressedLength(result, 0);
var bytes = new byte[sizes[0]];
target2.Decompress(result, 0 + sizes[1], size - sizes[1], bytes, 0, sizes[1]);
Assert.Equal(uncompressed, bytes);
}
public void compress_writes_uncompressed_length_first(int dataSize, int storageBytes)
{
var data = GetRandomData(dataSize);
var target = new SnappyCompressor();
int compressedSize = target.MaxCompressedLength(data.Length);
var compressed = new byte[compressedSize];
target.Compress(data, 0, data.Length, compressed);
var decompressor = new SnappyDecompressor();
var result = decompressor.ReadUncompressedLength(compressed, 0);
Assert.Equal(dataSize, result[0]);
Assert.Equal(storageBytes, result[1]);
}
public void round_trip_returns_original_data(string fileName)
{
byte[] uncompressed = File.ReadAllBytes(fileName);
var target = new SnappyCompressor();
var result = new byte[target.MaxCompressedLength(uncompressed.Length)];
int size = target.Compress(uncompressed, 0, uncompressed.Length, result);
var target2 = new SnappyDecompressor();
var sizes = target2.ReadUncompressedLength(result, 0);
var bytes = new byte[sizes[0]];
target2.Decompress(result, 0 + sizes[1], size - sizes[1], bytes, 0, sizes[1]);
Assert.Equal(uncompressed, bytes);
}
private static int[] ReadLengthData(byte[] data)
{
var target = new SnappyDecompressor();
return target.ReadUncompressedLength(data, 0);
}
public static int GetUncompressedLength(byte[] compressed, int offset, int count)
{
var decompressor = new SnappyDecompressor();
return(decompressor.ReadUncompressedLength(compressed, offset, count)[0]);
}
public void compress_writes_uncompressed_length_first(int dataSize, int storageBytes)
{
var data = GetRandomData(dataSize);
var target = new SnappyCompressor();
int compressedSize = target.MaxCompressedLength(data.Length);
var compressed = new byte[compressedSize];
target.Compress(data, 0, data.Length, compressed);
var decompressor = new SnappyDecompressor();
var result = decompressor.ReadUncompressedLength(compressed, 0);
Assert.Equal(dataSize, result[0]);
Assert.Equal(storageBytes, result[1]);
}
private static int[] ReadLengthData(byte[] data)
{
var target = new SnappyDecompressor();
return(target.ReadUncompressedLength(data, 0));
}
/// <summary> /// Get the uncompressed data length from a compressed Snappy block. /// </summary> /// <param name="input">Compressed snappy block.</param> /// <returns>The length of the uncompressed data in the block.</returns> /// <exception cref="InvalidDataException">The data in <paramref name="input"/> has an invalid length.</exception> /// <remarks> /// This is useful for allocating a sufficient output buffer before calling <see cref="Decompress"/>. /// </remarks> public static int GetUncompressedLength(ReadOnlySpan <byte> input) => SnappyDecompressor.ReadUncompressedLength(input);