/// <summary>
/// Generates the code for a function, with its subfunctions and variables
/// </summary>
/// <param name="mainDiagram">Main function for code generation</param>
/// <param name="functions">Subfunctions</param>
/// <param name="variables">Variables</param>
/// <param name="asmPath">Path of the resulting asm file</param>
public static void GenerateCode(Diagram mainDiagram, List <Diagram> functions, List <Variable> variables, string asmPath)
{
StreamWriter writer = new StreamWriter(asmPath, false);
AsmGenerator.RestoreLabelCounter();
AsmGenerator.WriteHead(writer);
if (variables.Count > 0)
{
AsmGenerator.WriteVariables(writer, variables);
}
AsmGenerator.WriteVectors(writer);
AsmGenerator.WriteConfiguration(writer);
//the program variables are initialized
if (variables.Count > 0)
{
AsmGenerator.WriteInitVariables(writer, variables);
}
// the main function is encoded
AsmGenerator.GenerateDiagramCode(writer, mainDiagram);
//the functions are encoded
foreach (Diagram diagram in functions)
{
AsmGenerator.GenerateDiagramCode(writer, diagram);
}
AsmGenerator.WriteEndDirective(writer);
writer.Close();
}
/// <summary>
/// Generate the code for a diagram
/// </summary>
/// <param name="writer"></param>
/// <param name="diagram">Diagram for the generation</param>
/// <param name="subrutine">Indicates whether it is a subroutine or not.True for subroutine</param>
private static void GenerateDiagramCode(StreamWriter writer, Diagram diagram)
{
Queue <Element> falseBranch = new Queue <Element>();
Hashtable labelElements = new Hashtable();
List <Element> elementsCodified = new List <Element>();
bool endElement = false, forceLoopEnd = false;
Element presentElement = AsmGenerator.GetNextElement(diagram.Start);
string label;
if (diagram.IsFunction)
{
AsmGenerator.WriteLabel(writer, diagram.Name);
}
while (presentElement != null)
{
if (elementsCodified.Contains(presentElement))
{
AsmGenerator.WriteUnconditionalJump(writer, (string)labelElements[presentElement]);
if (falseBranch.Count != 0)
{
presentElement = falseBranch.Dequeue();
continue;
}
else
{
break;
}
}
if (presentElement is Finish)
{
if (diagram.IsFunction)
{
AsmGenerator.WriteSubrutineEnd(writer);
}
else
if (!endElement)
{
AsmGenerator.WriteEndLoop(writer);
endElement = true;
}
else
{
AsmGenerator.WriteUnconditionalJump(writer, "loopEnd");
}
if (falseBranch.Count != 0)
{
presentElement = falseBranch.Dequeue();
continue;
}
else
{
break;
}
}
else
{
if (labelElements.ContainsKey(presentElement))
{
AsmGenerator.WriteLabel(writer, (string)labelElements[presentElement]);
}
else if (presentElement.MoreThan1Prev)
{
label = AsmGenerator.GenerateLabel();
labelElements.Add(presentElement, label);
AsmGenerator.WriteLabel(writer, label);
}
if (presentElement is Module)
{
((Module)presentElement).WriteCode(writer);
elementsCodified.Add(presentElement);
presentElement = AsmGenerator.GetNextElement(presentElement);
}
else if (presentElement is Conditional)
{
Element elementNextFalse = AsmGenerator.GetNextElement((Conditional)presentElement, false);
if (labelElements.ContainsKey(elementNextFalse))
{
label = (string)labelElements[elementNextFalse];
((Conditional)presentElement).WriteCode(writer, AsmGenerator.GetUnconditionalJump(label));
elementsCodified.Add(presentElement);
presentElement = AsmGenerator.GetNextElement((Conditional)presentElement, true);
}
else if (elementNextFalse is Finish)
{
if (diagram.IsFunction)
{
((Conditional)presentElement).WriteCode(writer, AsmGenerator.GetSubrutineEnd());
elementsCodified.Add(presentElement);
presentElement = AsmGenerator.GetNextElement((Conditional)presentElement, true);
}
else
{
((Conditional)presentElement).WriteCode(writer, AsmGenerator.GetUnconditionalJump("loopEnd"));
elementsCodified.Add(presentElement);
presentElement = AsmGenerator.GetNextElement((Conditional)presentElement, true);
forceLoopEnd = true;
}
}
else
{
label = AsmGenerator.GenerateLabel();
labelElements.Add(elementNextFalse, label);
falseBranch.Enqueue(elementNextFalse);
((Conditional)presentElement).WriteCode(writer, AsmGenerator.GetUnconditionalJump(label));
elementsCodified.Add(presentElement);
presentElement = AsmGenerator.GetNextElement((Conditional)presentElement, true);
}
}
}
}
if ((forceLoopEnd) && (!endElement))
{
AsmGenerator.WriteEndLoop(writer);
}
}
