Method AddLabel

source/script.cpp:4172–4198

ResultType Script::AddLabel(LPTSTR aLabelName, bool aAllowDupe)
// Returns OK or FAIL.
{
	if (!*aLabelName)
		return FAIL; // For now, silent failure because callers should check this beforehand.
	Label *&first_label = g->CurrentFunc ? g->CurrentFunc->mFirstLabel : mFirstLabel;
	Label *&last_label  = g->CurrentFunc ? g->CurrentFunc->mLastLabel  : mLastLabel;
	if (!aAllowDupe && FindLabel(aLabelName))
	{
		// Don't attempt to dereference label->mJumpToLine because it might not
		// exist yet.  Example:
		// label1:
		// label1:  <-- This would be a dupe-error but it doesn't yet have an mJumpToLine.
		// return
		return ScriptError(_T("Duplicate label."), aLabelName);
	}
	LPTSTR new_name = SimpleHeap::Alloc(aLabelName);
	Label *the_new_label = new Label(new_name); // Pass it the dynamic memory area we created.
	the_new_label->mPrevLabel = last_label;  // Whether NULL or not.
	if (first_label == NULL)
		first_label = the_new_label;
	else
		last_label->mNextLabel = the_new_label;
	// This must be done after the above:
	last_label = the_new_label;
	return OK;
}