/// <summary>
/// Encode a RIF byte array to zRIF string.
/// </summary>
/// <param name="zrif">The zRIF string.</param>
/// <returns>The zRIF string or null on error.</returns>
public static string Encode(byte[] rif)
{
byte[] output = new byte[128 + 2];
if ((rif.Length != 512) && (rif.Length != 1024))
{
Console.Error.WriteLine("[ERROR] invalid RIF length");
return(null);
}
var deflater = new Deflater();
deflater.SetDictionary(zrif_dict);
deflater.SetInput(rif);
deflater.SetLevel(Deflater.BEST_COMPRESSION);
deflater.SetStrategy(DeflateStrategy.Default);
deflater.Finish();
int size = deflater.Deflate(output, 0, output.Length - 2);
if (!deflater.IsFinished)
{
Console.Error.WriteLine("[ERROR] Deflate error");
return(null);
}
// Don't have that much control over Window size so our header needs to be adjusted.
if ((output[0] == 0x78) && (output[1] == 0xF9))
{
output[0] = 0x28;
output[1] = 0xEE;
}
// Adjust the size to be a multiple of 3 so that we don't get padding
return(Convert.ToBase64String(output, 0, ((size + 2) / 3) * 3));
}