private static void StripComments(ref StringSection line)
{
int iComment = line.IndexOf(';');
if (iComment >= 0)
{
line = line.Substring(0, iComment);
}
line = line.Trim();
}
private bool ParseNamedLabels(ref StringSection line, int iParsedLine, int iSourceLine)
{
int iColon = line.IndexOf(':');
if (iColon < 0)
{
return(false);
}
if ((line.Length - 1 > iColon) && (line[iColon + 1] == '='))
{
// := is not a label
return(false);
}
var labelName = line.Substring(0, iColon).Trim();
// Todo: should be able to validate via a 'parse symbol' func
// Check for nonzero length and that label starts with letter or @
if (labelName.Length == 0)
{
return(false);
}
if (!char.IsLetter(labelName[0]) && labelName[0] != '@')
{
return(false);
}
for (int i = 1; i < labelName.Length; i++) // i = 1 because we've already checked zero
{
if (!char.IsLetter(labelName[i]) && !char.IsDigit(labelName[i]) && labelName[i] != '_')
{
return(false);
}
}
if (labelName[0] == '@') // Local label
{
labelName = labelName.Substring(1); // Remove @
string fullName = mostRecentNamedLabel + "." + labelName.ToString(); // example: SomeFunction.LoopTop
assembly.Labels.Add(new Label(fullName, iParsedLine, iSourceLine, true));
}
else // Normal label
{
var sLabelName = labelName.ToString();
mostRecentNamedLabel = sLabelName;
assembly.Labels.Add(new Label(sLabelName, iParsedLine, iSourceLine, false));
}
line = line.Substring(iColon + 1).TrimLeft();
return(true);
}