internal static List <AbstractNode> GetMethodBodyChildren(AbstractNode node, CodeGenVisitor c)
{
// return children that are Assignment Expressions and also ones that are Method Calls
List <AbstractNode> retVal = new List <AbstractNode>();
AbstractNode an;
an = node.Child;
while (an != null)
{
if (an.GetType() == typeof(AssignmentExpr) || an.GetType() == typeof(MethodCall) ||
an.GetType() == typeof(SelectionStmt) || an.GetType() == typeof(Stmt))
{
retVal.Add(an);
}
if (an.GetType() == node.GetType())
{
retVal.AddRange(GetMethodBodyChildren(an, c));
}
if (an.Sib != an)
{
an = an.Sib;
}
}
return(retVal);
}
public static void CodeGenVisitAllChildren(AbstractNode node, CodeGenVisitor c)
{
AbstractNode an;
an = node.Child;
while (an != null)
{
an.Accept(c);
if (an.Sib != an)
{
an = an.Sib;
}
}
}
private void CreateIlFile()
{
Console.WriteLine("\nCreating .il file\n");
if (File.Exists(_filename + ".il"))
{
File.Delete(_filename + ".il");
}
using (StreamWriter sw = File.CreateText(_filename + ".il"))
{
//CodeGenVisitor codeGenVisitor = new CodeGenVisitor(System.Console.Out);
CodeGenVisitor codeGenVisitor = new CodeGenVisitor(sw);
codeGenVisitor.CreateIlFileContent(CurrentSemanticValue);
}
}
internal static void VisitLoopBodyChildren(Stmt node, CodeGenVisitor codeGenVisitor)
{
// Get local var decls
// Find the localvardeclsandstmts child
Utilities.VisitSpecificChild(node, typeof(LocalVarDeclsAndStmts), codeGenVisitor);
// And visit all of its children
// Get list of children that are not variable declarations (only assignment expr and method calls currently supported)
List <AbstractNode> loopBodyChidlren = Utilities.GetMethodBodyChildren(node, codeGenVisitor);
// Process them in reverse order
for (int i = loopBodyChidlren.Count - 1; i >= 0; i--)
{
// filter out statement for us
if (loopBodyChidlren[i].Name != null && !loopBodyChidlren[i].Name.Contains(("Iteration")))
{
loopBodyChidlren[i].Accept(codeGenVisitor);
}
}
//
}
internal static void VisitThenChildren(SelectionStmt node, CodeGenVisitor codeGenVisitor)
{
AbstractNode an;
an = node.Child;
while (an != null)
{
if (an.Name == null || !an.Name.Contains("Else"))
{
if (an.GetType() != typeof(Expr))
{
an.Accept(codeGenVisitor);
}
}
if (an.Sib != an)
{
an = an.Sib;
}
}
}
// Visits first occurence of child
internal static void VisitSpecificChild(AbstractNode node, Type type, CodeGenVisitor codeGenVisitor)
{
AbstractNode an;
an = node.Child;
while (an != null)
{
if (an.NodeType == type)
{
an.Accept(codeGenVisitor);
break;
}
else
{
VisitSpecificChild(an, type, codeGenVisitor);
}
if (an.Sib != an)
{
an = an.Sib;
}
}
}
public void GenCode()
{
// Create file
string ilFileName = filename.Split('.')[0] + ".il";
if (File.Exists(ilFileName))
{
File.Delete(ilFileName);
}
using (FileStream fs = File.Create(ilFileName))
{
CodeGenVisitor visitor = new CodeGenVisitor();
Console.WriteLine("Starting code generation");
// Write file header
StringBuilder sb = new StringBuilder();
Byte[] info;
sb.AppendLine(String.Format("//-----------------------------------------------------------------", ilFileName, filename));
sb.AppendLine(String.Format("//IL Header - Lenny Bogdanov\n//File: {0} \n//Source File: {1} \n//Date: {2} {3}",
ilFileName, filename, System.DateTime.Now.ToLongDateString(), System.DateTime.Now.ToLongTimeString()));
sb.AppendLine(String.Format("//-----------------------------------------------------------------", ilFileName, filename));
sb.AppendLine(String.Format("\n", ilFileName, filename));
sb.AppendLine(String.Format(".assembly extern mscorlib {{}}"));
sb.AppendLine(String.Format(".assembly a{{}} //Not sure why this was necessary for me to do", ilFileName, filename));
sb.AppendLine(String.Format("\n", ilFileName, filename));
info = new UTF8Encoding(true).GetBytes(sb.ToString());
fs.Write(info, 0, info.Length);
// Visit AST
// This is how we'll give the code gen reader access to the file we've opened
currentFileStream = fs;
CurrentSemanticValue.Accept(visitor);
fs.Close();
}
Console.WriteLine(filename + " -> " + filename.Split('.')[0] + ".il");
}
public void GenerateCode(string filename)
{
CodeGenVisitor visitor = new CodeGenVisitor();
Console.WriteLine("Starting code generation");
visitor.GenCode(CurrentSemanticValue, filename);
}
