/// <summary>
/// evaluate if this pattern matches the current location in the string.
/// </summary>
/// <param name="InString"></param>
/// <param name="InBx"></param>
/// <param name="InEx"></param>
/// <param name="InIx"></param>
/// <returns></returns>
public bool Evaluate(string Text, int Bx, int Ex, int Ix)
{
if (mLeadChar == Text[Ix])
{
return(true);
}
else
{
bool rv = Stringer.CompareSubstringEqual(
Text, Ix, Ex, this.PatternValue);
return(rv);
}
}
/// <summary>
/// Find the pattern that matches the substring at the spcfd position
/// in the string.
/// </summary>
/// <param name="InString"></param>
/// <param name="InStringIx"></param>
/// <param name="InStringEx"></param>
/// <returns></returns>
public ScanPattern FindPatternAtSubstring(
string InString, int InStringIx, int InStringEx)
{
ScanPattern foundPat = null;
char ch1 = InString[InStringIx];
// find first pattern that matches lead char of the substring.
int patIx = Array.IndexOf <char>(this.LeadChars, ch1);
if (patIx >= 0)
{
ScanPattern pat = this.ScanPatternsArray[patIx];
while (pat != null)
{
// bool rv = ScanPattern.Evaluate(
bool rv = Stringer.CompareSubstringEqual(
InString, InStringIx, InStringEx, pat.PatternValue);
if (rv == true)
{
if (foundPat == null)
{
foundPat = pat;
}
// Matching pattern already found, but this pattern also matches and it is
// longer. Always return the longer pattern.
else if (pat.PatternValue.Length > foundPat.PatternValue.Length)
{
foundPat = pat;
}
}
pat = pat.NextSameLeadChar;
}
}
return(foundPat);
}