static SymbolBase ParseLocField(string locField, ParsingStatus status)
{
if (locField == "")
{
return(null);
}
status.LineSection = LineSection.LocationField;
var symbol = ValueSymbol.ParseDefinition(locField, 0, status);
if (symbol == null)
{
status.ReportParsingError(0, locField.Length, "invalid symbol name");
return(null);
}
if (status.Symbols.Contains(symbol))
{
symbol = status.Symbols[symbol.Name];
if (symbol.IsSymbolDefined && !symbol.IsMultiValuedSymbol)
{
status.ReportParsingError(0, locField.Length, "symbol already defined");
return(null);
}
return(symbol);
}
status.Symbols.Add(symbol);
return(symbol);
}
void MSetButton_Click(object sender, EventArgs e)
{
if (mSymbols == null)
{
mSymbols = new SymbolCollection();
}
string symbolName = mSymbolNameTextBox.Text;
long symbolMagnitude = mSymbolValueTextBox.Magnitude;
Word.Signs symbolSign = mSymbolValueTextBox.Sign;
SymbolBase symbol = mSymbols[symbolName];
ValueSymbol valueSymbol = null;
if (symbol != null)
{
valueSymbol = symbol as ValueSymbol;
if (valueSymbol == null)
{
return;
}
valueSymbol.SetValue(symbolSign, symbolMagnitude);
var valueText = symbolMagnitude.ToString();
if (symbolSign.IsNegative())
{
valueText = '-' + valueText;
}
mListView.Items[symbolName].SubItems[valueFieldIndex].Text = valueText;
}
else
{
valueSymbol = ValueSymbol.ParseDefinition(symbolName) as ValueSymbol;
if (valueSymbol == null)
{
return;
}
valueSymbol.SetValue(symbolSign, symbolMagnitude);
mSymbols.Add(valueSymbol);
ShowSymbol(valueSymbol);
}
SetEnabledStates();
}
