/// <summary>Decodes the specified input.</summary>
/// <param name="input">The input.</param>
/// <param name="inputOffset">The input offset.</param>
/// <param name="inputLength">Length of the input.</param>
/// <param name="output">The output.</param>
/// <param name="outputOffset">The output offset.</param>
/// <param name="outputLength">Length of the output.</param>
/// <param name="knownOutputLength">Set it to <c>true</c> if output length is known.</param>
/// <returns>Number of bytes written.</returns>
public static int Decode(
byte[] input,
int inputOffset,
int inputLength,
byte[] output,
int outputOffset,
int outputLength = 0,
bool knownOutputLength = false)
{
return(Decoder.Decode(input, inputOffset, inputLength, output, outputOffset, outputLength, knownOutputLength));
}
/// <summary>Performs the quick auto-test on given compression service.</summary>
/// <param name="service">The service.</param>
/// <returns>A service or <c>null</c> if it failed.</returns>
private static ILZ4Service AutoTest(ILZ4Service service)
{
const string loremIpsum =
"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut " +
"labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco " +
"laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in " +
"voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat " +
"non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
// generate some well-known array of bytes
const string inputText = loremIpsum + loremIpsum + loremIpsum + loremIpsum + loremIpsum;
var original = Encoding.UTF8.GetBytes(inputText);
// LZ4 test
{
// compress it
var encoded = new byte[MaximumOutputLength(original.Length)];
var encodedLength = service.Encode(original, 0, original.Length, encoded, 0, encoded.Length);
if (encodedLength < 0)
{
return(null);
}
// decompress it (knowing original length)
var decoded = new byte[original.Length];
var decodedLength1 = service.Decode(encoded, 0, encodedLength, decoded, 0, decoded.Length, true);
if (decodedLength1 != original.Length)
{
return(null);
}
var outputText1 = Encoding.UTF8.GetString(decoded, 0, decoded.Length);
if (outputText1 != inputText)
{
return(null);
}
// decompress it (not knowing original length)
var decodedLength2 = service.Decode(encoded, 0, encodedLength, decoded, 0, decoded.Length, false);
if (decodedLength2 != original.Length)
{
return(null);
}
var outputText2 = Encoding.UTF8.GetString(decoded, 0, decoded.Length);
if (outputText2 != inputText)
{
return(null);
}
}
// LZ4HC
{
// compress it
var encoded = new byte[MaximumOutputLength(original.Length)];
var encodedLength = service.EncodeHC(original, 0, original.Length, encoded, 0, encoded.Length);
if (encodedLength < 0)
{
return(null);
}
// decompress it (knowing original length)
var decoded = new byte[original.Length];
var decodedLength1 = service.Decode(encoded, 0, encodedLength, decoded, 0, decoded.Length, true);
if (decodedLength1 != original.Length)
{
return(null);
}
var outputText1 = Encoding.UTF8.GetString(decoded, 0, decoded.Length);
if (outputText1 != inputText)
{
return(null);
}
// decompress it (not knowing original length)
var decodedLength2 = service.Decode(encoded, 0, encodedLength, decoded, 0, decoded.Length, false);
if (decodedLength2 != original.Length)
{
return(null);
}
var outputText2 = Encoding.UTF8.GetString(decoded, 0, decoded.Length);
if (outputText2 != inputText)
{
return(null);
}
}
return(service);
}