/// <summary>
/// Initializes a new instance of the <see cref="StringParser" /> class.
/// </summary>
/// <param name="naturalComparer">The natural comparer.</param>
public StringParser(NaturalComparer naturalComparer)
{
m_NaturalComparer = naturalComparer;
}
private void ParseString()
{
int start = m_Idx;
bool roman = (m_NaturalComparer.m_NaturalComparerOptions & NaturalComparerOption.RomanNumber) != 0;
int romanValue = 0;
int lastRoman = int.MaxValue;
int cptLastRoman = 0;
do
{
if (roman)
{
int thisRomanValue = NaturalComparer.RomanLetterValue(m_CurChar);
if (thisRomanValue > 0)
{
bool handled = false;
if ((thisRomanValue == 1 || thisRomanValue == 10 || thisRomanValue == 100))
{
NextChar();
int nextRomanValue = NaturalComparer.RomanLetterValue(m_CurChar);
if (nextRomanValue == thisRomanValue * 10 | nextRomanValue == thisRomanValue * 5)
{
handled = true;
if (nextRomanValue <= lastRoman)
{
romanValue += nextRomanValue - thisRomanValue;
NextChar();
lastRoman = thisRomanValue / 10;
cptLastRoman = 0;
}
else
{
roman = false;
}
}
}
else
{
NextChar();
}
if (!handled)
{
if (thisRomanValue <= lastRoman)
{
romanValue += thisRomanValue;
if (lastRoman == thisRomanValue)
{
cptLastRoman += 1;
switch (thisRomanValue)
{
case 1:
case 10:
case 100:
if (cptLastRoman > 4)
{
roman = false;
}
break;
case 5:
case 50:
case 500:
if (cptLastRoman > 1)
{
roman = false;
}
break;
}
}
else
{
lastRoman = thisRomanValue;
cptLastRoman = 1;
}
}
else
{
roman = false;
}
}
}
else
{
roman = false;
}
}
else
{
NextChar();
}
if (!char.IsLetter(m_CurChar))
{
break; // TODO: might not be correct. Was : Exit Do
}
}while (true);
m_StringValue = m_Source.Substring(start, m_Idx - start);
if (roman)
{
m_NumericalValue = romanValue;
m_TokenType = NaturalComparer.TokenType.Numerical;
}
else
{
m_TokenType = NaturalComparer.TokenType.String;
}
}
