private IList <string> Tokenize(string text)
{
var tokens = new List <string>();
var letters = UnicodeUtils.Letters(text);
var token = string.Empty;
foreach (var letter in letters)
{
if (UnicodeUtils.IsEmoji(letter))
{
// Character is in a Supplementary Unicode Plane. This is where emoji live so
// we're going to just break each character in this range out as its own token.
tokens.Add(letter);
if (!string.IsNullOrWhiteSpace(token))
{
tokens.Add(token);
token = string.Empty;
}
}
else if (!(config.TokenRegex.IsMatch(letter) || string.IsNullOrWhiteSpace(letter)))
{
token = token + letter;
}
else if (!string.IsNullOrWhiteSpace(token))
{
tokens.Add(token);
token = string.Empty;
}
}
if (!string.IsNullOrWhiteSpace(token))
{
tokens.Add(token);
token = string.Empty;
}
return(tokens);
}
public static string CompressRle(byte[] bytes)
{
StringBuilder sbr = new StringBuilder();
for (int i = 0; i < bytes.Length;)
{
byte b = bytes[i];
if (i < bytes.Length - 1 && b == bytes[i + 1])
{
int count = 0;
while (count < 16384 && bytes[i + count] == b)
{
++count;
}
i += count;
if (count < 80)
{
sbr.Append(UnicodeUtils.EncodeByte((byte)(b + 32)));
sbr.Append(UnicodeUtils.EncodeByte((byte)count));
}
else
{
sbr.Append(UnicodeUtils.EncodeByte((byte)64));
sbr.Append(UnicodeUtils.EncodeByte(b));
for (int j = 0; j < 3; ++j)
{
sbr.Append(UnicodeUtils.EncodeByte((byte)(count & 0x3F)));
count /= 0x40;
}
}
}
else
{
sbr.Append(UnicodeUtils.EncodeByte(bytes[i++]));
}
}
return(sbr.ToString());
}