private bool TryReadStringPart(StringBuilder builder)
{
var lineLength = _line.Length;
if (_columnIndex >= lineLength || _line[_columnIndex] != '"')
{
AddError(DiagnosticCodes.ExpectedToken, new TextLocation(_lineIndex, _columnIndex >= 0 ? _columnIndex : lineLength), '"');
return(false);
}
var startIndex = ++_columnIndex;
for (; _columnIndex < lineLength; _columnIndex++)
{
if (_line[_columnIndex] == '"' && !IsEscaped(startIndex))
{
var endIndex = _columnIndex++;
_columnIndex = FindNextTokenInLine();
if (_columnIndex >= 0)
{
AddError(DiagnosticCodes.UnexpectedToken, new TextLocation(_lineIndex, lineLength));
return(false);
}
var index = POString.Decode(builder, _line, startIndex, endIndex - startIndex);
if (index >= 0)
{
AddError(DiagnosticCodes.InvalidEscapeSequence, new TextLocation(_lineIndex, index));
return(false);
}
_columnIndex = lineLength;
return(true);
}
}
AddError(DiagnosticCodes.ExpectedToken, new TextLocation(_lineIndex, lineLength), '"');
return(false);
bool IsEscaped(int si)
{
bool result = false;
for (var i = _columnIndex - 1; i >= si; i--)
{
if (_line[i] == '\\')
{
result = !result;
}
else
{
break;
}
}
return(result);
}
}
public static bool TryParse(string value, out POPreviousValueComment result)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
string idKindToken = null;
value = value.Trim();
var index = value.FindIndex(char.IsWhiteSpace);
if (index >= 0)
{
idKindToken = value.Remove(index);
value = value.Substring(index + 1).TrimStart();
}
int length;
POIdKind idKind;
StringBuilder sb;
if (index < 0 ||
(length = value.Length) < 2 || value[0] != '"' || value[length - 1] != '"' ||
(idKind = POKey.GetIdKind(idKindToken)) == POIdKind.Unknown ||
POString.Decode(sb = new StringBuilder(), value, 1, length - 2) >= 0)
{
result = null;
return(false);
}
result = new POPreviousValueComment {
IdKind = idKind, Value = sb.ToString()
};
return(true);
}
