public RegEx(string regex, bool caseSensitive)
{
if (caseSensitive)
{
regex = regex.ToLower();
}
//convert regex to NFA:
int index = -1;
NFA nfa = RegexToNFA(regex, ref index);
if (index < regex.Length)
{
throw new ParseException("Error occurred while parsing the regular expression!");
}
if (nfa != null)
{
//make epsilon transitions superfluous:
nfa.RemoveEpsilonTransitions();
//convert NFA to DFA:
transitionMatrix = nfa.GetDFATransitionMatrix(out startIndex);
//manipulate transition matrix to make it case sensitive:
if (caseSensitive)
{
for (int x = 0; x < transitionMatrix.Length; x++)
{
for (int y = 0; y <= ('Z' - 'A'); y++)
{
transitionMatrix[x][(byte)(y + 'A')] = transitionMatrix[x][(byte)(y + 'a')];
}
transitionMatrix[x][(byte)('Ä')] = transitionMatrix[x][(byte)('ä')];
transitionMatrix[x][(byte)('Ö')] = transitionMatrix[x][(byte)('ö')];
transitionMatrix[x][(byte)('Ü')] = transitionMatrix[x][(byte)('ü')];
}
}
}
}