private async Task <IEnumerable <string> > CalcAlignments(int i, int j)
{
var list = new List <string>();
if ((i == 0) && (j == 0))
{
return(list);
}
LevField field = null;
try
{
field = M[i, j];
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
}
if (field.Direction == ELevDirection.None)
{
return(null);
}
return(null);
}
public int CalculateLevenshteinDistance(string input1, string input2, bool useHeristic = false)
{
m = input1.Length;
n = input2.Length;
int dLength = Math.Abs(m - n);
int colOffset = 0, rowOffset = 0;
if (m < n)
{
colOffset = dLength;
}
if (n < m)
{
rowOffset = dLength;
}
int minLength = Math.Min(n, m);
a = input1;
b = input2;
M = new LevField[m + 1, n + 1];
int colStart = 0;
int colEnd = 0;
var K = 0;
int f, currentStart = 0;
LevField dist;
K = Helper.HammingDistance(a, b);
if (useHeristic)
{
for (int i = 0; i <= m; ++i)
{
//K = Helper.HammingDistance(a, b, minPos.Item1, minPos.Item2) + rowMin;
//Console.WriteLine(K);
//rowMin = int.MaxValue;
if (colStart != 0)
{
currentStart = colStart;
}
colStart = 0;
for (int j = currentStart; j <= n; ++j)
{
dist = new LevField(levDistanceDirection(i, j));
f = dist + Math.Abs((m - i) - (n - j));
if (f >= K)
{
//skipCols = (f == K) ? 1 : 2;
if (m < n)
{
if (j < i)
{
colStart = (colStart == 0) ? j + ((f == K) ? 1 : 2) : colStart;
}
else if ((colEnd < j) && (j - dLength > i))
{
if (f == K)
{
M[i, j] = dist;
colEnd = j;
}
break;
}
}
else
{
if (j + dLength < i)
{
colStart = (colStart == 0) ? j + ((f == K) ? 1 : 2) : colStart;
}
else if ((colEnd < j) && (j > i))
{
if (f == K)
{
M[i, j] = dist;
colEnd = j;
}
break;
}
}
}
M[i, j] = dist;
//Console.WriteLine(this);
//Thread.Sleep(100);
}
}
}
else
{
for (int i = 0; i <= m; ++i)
{
for (int j = 0; j <= n; ++j)
{
M[i, j] = new LevField(levDistanceDirection(i, j));
}
}
}
return(this.LevenshteinDistance);
}
