public override bool Equals(object obj)
{
LabelSymbol l = obj as LabelSymbol;
if (l != null)
{
return(l.Name == this.Name);
}
return(false);
}
public int GetLabelAddress(string labelId)
{
LabelSymbol label;
if (_labels.TryGetValue(labelId, out label))
{
if (label.IsFwdRef)
{
label.AddFwdRef(_ip);
}
return(label.Address);
}
else
{
LabelSymbol newLab = new LabelSymbol(labelId);
newLab.AddFwdRef(_ip);
_labels.Add(labelId, newLab);
return(0);
}
}
public void DefineLabel(IToken idToken)
{
LabelSymbol label;
if (_labels.TryGetValue(idToken.Text, out label))
{
if (label.IsFwdRef)
{
//label exists, patch up references
label.Define(_ip);
label.ResolveFwdRefs(_code);
}
else
{
throw new GenerationException(String.Format("line {0}:{1} Label '{2}' already defined", idToken.Line,
idToken.CharPositionInLine, idToken.Text));
}
}
else
{
label = new LabelSymbol(idToken.Text, _ip);
_labels.Add(label.Name, label);
}
}
public void DefineLabel(IToken idToken)
{
LabelSymbol label;
if (_labels.TryGetValue(idToken.Text, out label))
{
if (label.IsFwdRef)
{
//label exists, patch up references
label.Define(_ip);
label.ResolveFwdRefs(_code);
}
else
{
throw new GenerationException(String.Format("line {0}:{1} Label '{2}' already defined", idToken.Line,
idToken.CharPositionInLine, idToken.Text));
}
}
else
{
label = new LabelSymbol(idToken.Text, _ip);
_labels.Add(label.Name, label);
}
}
public int GetLabelAddress(string labelId)
{
LabelSymbol label;
if (_labels.TryGetValue(labelId, out label))
{
if (label.IsFwdRef)
{
label.AddFwdRef(_ip);
}
return label.Address;
}
else
{
LabelSymbol newLab = new LabelSymbol(labelId);
newLab.AddFwdRef(_ip);
_labels.Add(labelId, newLab);
return 0;
}
}