public virtual void SetDictionary(byte[] b, int off, int len)
{
lock (this)
{
inflater.SetDictionary(b, off, len);
}
}
/// <summary>
/// Decode a zRIF encoded string to a RIF byte array.
/// </summary>
/// <param name="zrif">The zRIF string</param>
/// <returns>The RIF byte array, or null on error</returns>
public static byte[] Decode(string zrif)
{
byte[] input, output = new byte[1024];
try
{
// Pad string if not a multiple of 4
if (zrif.Length % 4 != 0)
{
zrif += new string('=', 4 - (zrif.Length % 4));
}
input = Convert.FromBase64String(zrif);
}
catch (Exception e) when(e is System.FormatException || e is System.NullReferenceException)
{
Console.Error.WriteLine($"[ERROR] {e.Message}");
return(null);
}
if (input.Length < 6)
{
Console.Error.WriteLine("[ERROR] zRIF length too short");
return(null);
}
if (((input[0] << 8) + input[1]) % 31 != 0)
{
Console.Error.WriteLine("[ERROR] zRIF header is corrupted");
return(null);
}
var inflater = new Inflater();
inflater.SetInput(input);
inflater.Inflate(output);
if (inflater.IsNeedingDictionary)
{
inflater.SetDictionary(zrif_dict);
}
switch (inflater.Inflate(output))
{
case 1024:
return(output);
case 512:
return(MemCpy(output, 0, 512));
default:
return(null);
}
}
