public override void Visit(MethodDeclNode node)
{
MethodBeingVisited = ClassBeingVisited.Methods.Lookup(node.methodName.name);
int Offset = 4; // Initialize to 4 because we need to reserve 4 bytes for return address
for (int x = 0; x < MethodBeingVisited.Parameters.Count; x++)
{
ParameterDefinition parameter = MethodBeingVisited.Parameters.ItemAt(x);
parameter.SizeInBytes = 4;
Offset += parameter.SizeInBytes;
parameter.Location = Offset;
}
MethodBeingVisited.SizeOfParametersInBytes = Offset - 4;
Offset = 0;
for (int x = 0; x < MethodBeingVisited.LocalVariables.Count; x++)
{
VariableDefinition variable = MethodBeingVisited.LocalVariables.ItemAt(x);
variable.SizeInBytes = 4;
Offset += variable.SizeInBytes;
variable.Location = Offset;
}
MethodBeingVisited.SizeOfLocalVariablesInBytes = Offset;
}
public virtual void Visit(MethodDeclNode node)
{
MethodBeingVisited = ClassBeingVisited.Methods.Lookup(node.methodName.name);
if (node.paramDeclList != null)
for (int x = 0; x < node.paramDeclList.paramDeclList.Count; x++)
node.paramDeclList.ParamDeclAtIndex(x).Accept(this);
if (node.variableDeclList != null)
for (int x = 0; x < node.variableDeclList.variableDeclList.Count; x++)
node.variableDeclList.VariableDeclAtIndex(x).Accept(this);
if (node.statementList != null)
for (int x = 0; x < node.statementList.statementList.Count; x++)
node.statementList.StatementAtIndex(x).Accept(this);
}
public override void Visit(MethodDeclNode node)
{
MethodBeingVisited = ClassBeingVisited.Methods.Add(node.methodName.name);
MethodBeingVisited.ClassDefinition = ClassBeingVisited;
MethodBeingVisited.ReturnType = node.methodType.Type;
if (node.paramDeclList != null)
for (int x = 0; x < node.paramDeclList.paramDeclList.Count; x++)
node.paramDeclList.ParamDeclAtIndex(x).Accept(this);
if (node.variableDeclList != null)
for (int x = 0; x < node.variableDeclList.variableDeclList.Count; x++)
{
VariableDefinition variableDefinition = MethodBeingVisited.LocalVariables.Add(node.variableDeclList.VariableDeclAtIndex(x).identifier.name);
variableDefinition.VariableType = node.variableDeclList.VariableDeclAtIndex(x).type.Type;
if (variableDefinition.VariableType.GetType() == typeof(ClassType))
variableDefinition.VariableType = Analysis.Environment.Classes.Lookup(variableDefinition.VariableType.Name).ClassType;
}
}
public override void Visit(MethodDeclNode node)
{
MethodBeingVisited = ClassBeingVisited.Methods.Lookup(node.methodName.name);
GenText(ClassBeingVisited.Name + "$" + node.methodName.name + ":");
Gen("push", "ebp", "", "Save caller's stack frame pointer");
Gen("mov", "ebp", "esp");
if(MethodBeingVisited.SizeOfLocalVariablesInBytes > 0)
Gen("sub", "esp", MethodBeingVisited.SizeOfLocalVariablesInBytes.ToString(), "Allocate new stack frame");
if (node.paramDeclList != null)
for (int x = 0; x < node.paramDeclList.paramDeclList.Count; x++)
node.paramDeclList.ParamDeclAtIndex(x).Accept(this);
if (node.variableDeclList != null)
for (int x = 0; x < node.variableDeclList.variableDeclList.Count; x++)
node.variableDeclList.VariableDeclAtIndex(x).Accept(this);
if (node.statementList != null)
for (int x = 0; x < node.statementList.statementList.Count; x++)
node.statementList.StatementAtIndex(x).Accept(this);
if (MethodBeingVisited.SizeOfLocalVariablesInBytes > 0)
Gen("mov", "esp", "ebp", "Deallocate local variables from stack");
Gen("pop", "ebp", "", "Restore ebp to caller's stack frame pointer");
Gen("ret", "", "", "Retrun from " + ClassBeingVisited.Name + "$" + node.methodName.name);
}
public void AddMethodDecl(MethodDeclNode methodDecl)
{
this.methodDeclList.Add(methodDecl);
}
public void AddMethodDecl(MethodDeclNode methodDecl)
{
this.methodDeclList.Add(methodDecl);
}
public override void Visit(MethodDeclNode node)
{
Console.WriteLine(this.indentation + "Method: " + node.methodName.name + " ---- Method Declaration ----");
indentation = indentation + " ";
Console.WriteLine(this.indentation + "returns " + node.methodType.toString());
if (node.paramDeclList != null)
{
for (int x = 0; x < node.paramDeclList.paramDeclList.Count; x++)
{
node.paramDeclList.ParamDeclAtIndex(x).Accept(this);
}
}
if (node.variableDeclList != null)
{
for (int x = 0; x < node.variableDeclList.variableDeclList.Count; x++)
{
node.variableDeclList.VariableDeclAtIndex(x).Accept(this);
}
}
if (node.statementList != null)
{
for (int x = 0; x < node.statementList.statementList.Count; x++)
{
node.statementList.StatementAtIndex(x).Accept(this);
}
}
indentation = indentation.Substring(0, indentation.Length - 3);
}