private bool ParseRemaining()
{
int start = _parsePoint;
if (CharacterUtilities.IsNumberStart(_expression[_parsePoint])) // numeric
{
if (!ParseNumeric(start))
{
return(false);
}
}
else if (CharacterUtilities.IsSimpleStringStart(_expression[_parsePoint])) // simple string (handle 'and' and 'or')
{
if (!ParseSimpleStringOrFunction(start))
{
return(false);
}
}
else
{
// Something that wasn't a number or a letter, like a newline (%0a)
_errorState = true;
_errorPosition = start + 1;
_errorResource = "UnexpectedCharacterInCondition";
_unexpectedlyFound = Convert.ToString(_expression[_parsePoint], CultureInfo.InvariantCulture);
return(false);
}
return(true);
}
private void SkipSimpleStringChars()
{
while (_parsePoint < _expression.Length && CharacterUtilities.IsSimpleStringChar(_expression[_parsePoint]))
{
_parsePoint++;
}
return;
}
private void SkipHexDigits()
{
while (_parsePoint < _expression.Length && CharacterUtilities.IsHexDigit(_expression[_parsePoint]))
{
_parsePoint++;
}
return;
}
private bool ParseNumeric(int start)
{
if ((_expression.Length - _parsePoint) > 2 && _expression[_parsePoint] == '0' && (_expression[_parsePoint + 1] == 'x' || _expression[_parsePoint + 1] == 'X'))
{
// Hex number
_parsePoint += 2;
SkipHexDigits();
_lookahead = new Token(Token.TokenType.Numeric, _expression.Substring(start, _parsePoint - start));
}
else if (CharacterUtilities.IsNumberStart(_expression[_parsePoint]))
{
// Decimal number
if (_expression[_parsePoint] == '+')
{
_parsePoint++;
}
else if (_expression[_parsePoint] == '-')
{
_parsePoint++;
}
do
{
SkipDigits();
if (_parsePoint < _expression.Length && _expression[_parsePoint] == '.')
{
_parsePoint++;
}
if (_parsePoint < _expression.Length)
{
SkipDigits();
}
} while (_parsePoint < _expression.Length && _expression[_parsePoint] == '.');
// Do we need to error on malformed input like 0.00.00)? or will the conversion handle it?
// For now, let the conversion generate the error.
_lookahead = new Token(Token.TokenType.Numeric, _expression.Substring(start, _parsePoint - start));
}
else
{
// Unreachable
_errorState = true;
_errorPosition = start + 1;
return(false);
}
return(true);
}
