// TODO: Check Suffix array get matches method
public IEnumerable <Match> FindMatchesAtPosition(byte[] input, int position)
{
var maxSize = FindLimitations.MaxLength <= 0 ? input.Length : FindLimitations.MaxLength;
var maxDisplacement = FindLimitations.MaxDisplacement <= 0 ? input.Length : FindLimitations.MaxDisplacement;
if (!_array.IsBuilt)
{
_array.Build(input, 0, FindLimitations.MinLength);
}
if (input.Length - position < FindLimitations.MinLength)
{
yield break;
}
var cappedSize = Math.Min(maxSize, input.Length - position);
var longestMatchSize = FindLimitations.MinLength - 1;
var displacement = -1;
var offsets = _array.GetOffsets(position, FindLimitations.MinLength, FindLimitations.MinDisplacement, maxDisplacement, (int)FindOptions.UnitSize);
foreach (var offset in offsets.OrderByDescending(x => x))
{
var matchLength = FindLimitations.MinLength;
while (matchLength < cappedSize && input[offset + matchLength] == input[position + matchLength])
{
matchLength++;
}
if (matchLength > longestMatchSize)
{
longestMatchSize = matchLength;
displacement = position - offset;
if (longestMatchSize == cappedSize)
{
break;
}
}
}
if (displacement > -1)
{
yield return(new Match(position, displacement, longestMatchSize));
}
}