public string Emit()
{
StringBuilder sb = new StringBuilder();
StackSegment stack = new StackSegment();
sb.AppendLine(stack.Generate());
if (mDataSegment.Count > 0)
{
sb.AppendLine(DataSegmentElement.GetDataSegmentKeyword());
foreach (DataSegmentElement data in mDataSegment)
{
sb.AppendLine(data.Generate());
}
}
sb.AppendLine(CodeSegmentElement.GetCodeSegmentKeyword());
if (mCodeSegment.ContainsKey("init"))
{
sb.AppendLine("init:");
foreach (CodeSegmentElement elm in mCodeSegment["init"])
{
sb.AppendLine(elm.Generate());
}
mCodeSegment.Remove("init");
}
if (mCodeSegment.ContainsKey("main"))
{
sb.AppendLine("start:");
sb.AppendLine(Commands.GetCommand(Command.call, "main"));
sb.AppendLine("teminate:");
sb.AppendLine(Commands.GetCommand(Command.exit));
sb.AppendLine(Commands.GetCommand(Command.nop));
}
foreach (string label in mCodeSegment.Keys)
{
foreach (CodeSegmentElement elm in mCodeSegment[label])
{
sb.AppendLine(elm.Generate());
}
}
return(sb.ToString());
}
public override void CaseAVariableDefinition(AVariableDefinition node)
{
// create the variable in the data segment
DataSegmentElement elm = new DataSegmentElement(node.GetName().Text, TypeEnvironment.GetVxcTypeOf(node.GetTypeSpecifier().GetType()));
mOutputFile.mDataSegment.Add(elm);
// create initializer expression in code segment.
PExpression pexp = node.GetInit();
if (pexp != null)
{
long value = TypeEnvironment.GetValueOf(pexp);
VariableInitializerExpression exp = new VariableInitializerExpression(value, elm.Type, elm.Identifier);
mOutputFile.AddTemplate("init", exp);
}
base.CaseAVariableDefinition(node);
}
