public ExpressionRecognizerOutput EvaluateExpression(ExpressionRecognizerInput regularExpression)
{
var ret = new ExpressionRecognizerOutput();
if (regularExpression.Expression.Length == 0)
{
ret.ErrorText = "You must enter a regular expression before compiling.";
ret.CompletedSuccesfully = false;
return(ret);
}
StringBuilder sb = new StringBuilder(10000);
try
{
var statusCode = _expressionRecognizer.CompileWithStats(regularExpression.Expression, sb);
if (statusCode != CompilationStatus.SUCCESS)
{
string errSubstring = regularExpression.Expression.Substring(_expressionRecognizer.GetLastErrorPosition(), _expressionRecognizer.GetLastErrorLength());
string format = "Error occured during compilation.\nCode: {0}\nAt: {1}\nSubstring: {2}";
ret.ErrorText = String.Format(format, statusCode.ToString(), _expressionRecognizer.GetLastErrorPosition(), errSubstring);
ret.CompletedSuccesfully = false;
return(ret);
}
}
catch (Exception ex)
{
ret.ErrorText = "Error occured during compilation.\n\n" + ex.Message;
ret.CompletedSuccesfully = false;
return(ret);
}
ret.OutputText = sb.ToString();
return(ret);
}
public ExpressionRecognizerOutput FindAllMatch(ExpressionRecognizerInput regularExpression)
{
var ret = new ExpressionRecognizerOutput();
if (!_expressionRecognizer.IsReady())
{
ret.ErrorText = "You must first compile a regular expression.";
ret.CompletedSuccesfully = false;
return(ret);
}
ret.MatchInfo = new List <MatchInfo>();
int foundStart = -1;
int foundEnd = -1;
int startAt = 0;
int matchLength = -1;
do
{
bool matchFound = _expressionRecognizer.FindMatch(regularExpression.SearchString, startAt,
regularExpression.SearchString.Length - 1, ref foundStart, ref foundEnd);
if (matchFound == true)
{
string sSubstring = "{Empty String}";
matchLength = foundEnd - foundStart + 1;
if (matchLength > 0)
{
sSubstring = regularExpression.SearchString.Substring(foundStart,
matchLength);
}
ret.MatchInfo.Add(
new MatchInfo()
{
MatchString = sSubstring,
StartIndex = foundStart,
EndIndex = foundEnd,
Length = matchLength
});
startAt = foundEnd + 1;
}
else
{
break;
}
} while (startAt < regularExpression.SearchString.Length);
return(ret);
}
public ExpressionRecognizerOutput FindNextMatch(ExpressionRecognizerInput regularExpression)
{
var ret = new ExpressionRecognizerOutput();
if (!_expressionRecognizer.IsReady())
{
ret.ErrorText = "You must first compile a regular expression.";
ret.CompletedSuccesfully = false;
return(ret);
}
ret.MatchInfo = new List <MatchInfo>();
int foundStart = -1;
int foundEnd = -1;
int startAt = 0;
bool matchFound = _expressionRecognizer.FindMatch(regularExpression.SearchString, startAt,
regularExpression.SearchString.Length - 1, ref foundStart, ref foundEnd);
if (matchFound)
{
int matchLength = foundEnd - foundStart + 1;
if (matchLength == 0)
{
ret.OutputText = $"Matched an empty string at position { foundStart.ToString() }. ";
}
else
{
ret.MatchInfo.Add(
new MatchInfo()
{
MatchString = "Use Index To Find Out :)",
StartIndex = foundStart,
EndIndex = foundEnd,
Length = matchLength
});
}
}
else
{
ret.OutputText = "No match found.";
}
return(ret);
}
