public int match_length(string text, string pattern, int loc, bool isWholeWord, double threashold)
{
// Case 0: pattern.length = 0 or text.length = 0
if (text == null || pattern == null || text.Length == 0 || pattern.Length == 0)
{
return(0);
}
// Case 1: exact match
if (loc + pattern.Length < text.Length &&
text.Substring(loc, pattern.Length).ToLower() == pattern.ToLower())
{
if (!(isWholeWord && loc + pattern.Length < text.Length && !Utils.IsValidEndText(text.Substring(loc, pattern.Length + 1))))
{
return(pattern.Length);
}
}
// Case 2: not exact match
int counter = 0;
double matchIndex = 0;
string matchWord = "";
NeedlemanWunch nw = new NeedlemanWunch();
while (counter < pattern.Length * 2)
{
if (counter + loc < text.Length)
{
counter++;
string tempMatchWord = text.Substring(loc, counter);
if (isWholeWord && counter + loc < text.Length && !Utils.IsValidEndText(text.Substring(loc + counter)))
{
continue;
}
double tempMatchIndex = nw.GetSimilarity(pattern, tempMatchWord);
if (tempMatchIndex > matchIndex)
{
matchIndex = tempMatchIndex;
matchWord = tempMatchWord;
}
}
else
{
break;
}
}
if (matchIndex < threashold)
{
return(-1);
}
else
{
return(matchWord.Length);
}
}
public int match_length(string text, string pattern, int loc, bool isWholeWord, double threashold)
{
// Case 0: pattern.length = 0 or text.length = 0
if (text == null || pattern == null || text.Length == 0 || pattern.Length == 0)
return 0;
// Case 1: exact match
if (loc + pattern.Length < text.Length &&
text.Substring(loc, pattern.Length).ToLower() == pattern.ToLower())
{
if (!(isWholeWord && loc + pattern.Length < text.Length && !Utils.IsValidEndText(text.Substring(loc, pattern.Length + 1))))
return pattern.Length;
}
// Case 2: not exact match
int counter = 0;
double matchIndex = 0;
string matchWord = "";
NeedlemanWunch nw = new NeedlemanWunch();
while (counter < pattern.Length * 2)
{
if (counter + loc < text.Length)
{
counter++;
string tempMatchWord = text.Substring(loc, counter);
if (isWholeWord && counter + loc < text.Length && !Utils.IsValidEndText(text.Substring(loc + counter)))
{
continue;
}
double tempMatchIndex = nw.GetSimilarity(pattern, tempMatchWord);
if (tempMatchIndex > matchIndex)
{
matchIndex = tempMatchIndex;
matchWord = tempMatchWord;
}
}
else
{
break;
}
}
if (matchIndex < threashold)
return -1;
else
return matchWord.Length;
}