private string Check(string sample, string[] langs)
{
if (sample.Length < MIN_LENGTH)
{
return(null);
}
Hashtable scores = new Hashtable();
TrigramModel model = CreateOrderedModel(sample);
int lowestScore = Int32.MaxValue;
string lowestScoreLanCode = null;
for (int i = 0; i < langs.Length; i++)
{
string lkey = langs[i].ToLower();
if (langStat.Models[lkey] == null)
{
continue; //next please, no known model for this
}
TrigramModel known_model = (TrigramModel)langStat.Models[lkey];
int dist = Distance(model, known_model);
scores[lkey] = dist;
if (dist < lowestScore)
{
lowestScore = dist;
lowestScoreLanCode = lkey;
}
}
return(lowestScoreLanCode);
}
private int Distance(TrigramModel model, TrigramModel known_model)
{
// Calculate the distance to the known model.
int dist = 0;
for (int i = 0; i < model.Trigrams.Length; i++)
{
if (known_model.HasTrigram(model.Trigrams[i].t))
{
dist += Math.Abs(model.Trigrams[i].score - known_model.GetScore(model.Trigrams[i].t));
}
else
{
dist += MAX_GRAMS;
}
}
return(dist);
}