/// <summary>
/// Finds the nearest matching label with the same name.
/// </summary>
/// <param name="name">The label to search for.</param>
/// <param name="line">Search for matches near this line number.</param>
/// <param name="log">A log to write warnings/errors to.</param>
/// <returns>Returns True if found.</returns>
public bool GetNearestLabel(string name, int line, out Label closestMatch)
{
List<Label> ids;
closestMatch = null;
bool found = labelDic.TryGetValue(name, out ids);
if (found)
{
// if only one match lets shortcut and take only that one
if (ids.Count == 1)
closestMatch = ids[0];
else
{
int closestDistance = int.MaxValue;
foreach (Label l in ids)
{
int thisDistance = Math.Abs(line - l.lineNum);
if (thisDistance <= closestDistance)
{
closestDistance = thisDistance;
closestMatch = l;
}
}
}
}
return found;
}
/// <summary>
/// Adds a label to the label dictionary.
/// </summary>
/// <param name="newLabel">The new label to add to the Labels container.</param>
/// <param name="log">Location to write errors and warnings.</param>
public void AddLabel(Label newLabel, Log log)
{
List<Label> ids;
if (labelDic.TryGetValue(newLabel.labelName, out ids))
{
log.Warning("The label, {0}, already exists. References will use the nearest label based on line number.", newLabel.labelName);
ids.Add(newLabel);
}
else
{
ids = new List<Label>();
ids.Add(newLabel);
labelDic.Add(newLabel.labelName, ids);
}
}
/// <summary>
/// Adds a label to the label dictionary.
/// </summary>
/// <param name="name">The name of the label. (i.e "myLabel" in myLabel:)</param>
/// <param name="firstStmt">The next statement following this label.</param>
/// <param name="log">Location to write errors and warnings.</param>
public void AddLabel(string name, int lineNum, Stmt firstStmt, Log log)
{
Label newLabel = new Label { labelName = name, lineNum = lineNum, firstStmt = firstStmt };
AddLabel(newLabel, log);
}