//
-// CodeGenerator.cs: The actual IL code generator for JScript .Net programs.
+// CodeGenerator.cs
//
// Author:
// Cesar Lopez Nataren (cesar@ciencias.unam.mx)
using System;
using System.Reflection;
using System.Reflection.Emit;
-using System.Runtime.CompilerServices;
-using Microsoft.JScript.Vsa;
+using System.Threading;
-namespace Microsoft.JScript.Tmp {
+namespace Microsoft.JScript {
- internal sealed class CodeGenerator {
+ internal class EmitContext {
- internal AssemblyName assemblyName;
- internal AssemblyBuilder assemblyBuilder;
- internal ModuleBuilder moduleBuilder;
- internal TypeBuilder typeBuilder;
- internal ILGenerator ilGen;
+ internal TypeBuilder type_builder;
- internal string MODULE_NAME = "JScript Module";
- internal string GLOBAL_SCOPE = "Microsoft.JScript.GlobalScope";
-
- internal CodeGenerator (string assemName, AssemblyBuilderAccess access)
+ internal EmitContext (TypeBuilder type)
{
- assemblyName = new AssemblyName ();
- assemblyName.Name = assemName;
-
- AppDomain appDomain = AppDomain.CurrentDomain;
-
- this.assemblyBuilder = appDomain.DefineDynamicAssembly (assemblyName,
- access);
-
- this.moduleBuilder = assemblyBuilder.DefineDynamicModule (MODULE_NAME,
- assemblyName.Name + ".exe", false);
- }
-
-
- internal void EmitJScript0Type ()
- {
- this.typeBuilder = moduleBuilder.DefineType ("JScript 0",
- TypeAttributes.Class |
- TypeAttributes.Public);
-
- this.typeBuilder.SetParent (typeof (Microsoft.JScript.GlobalScope));
-
- CustomAttributeBuilder attr;
- Type t = typeof (CompilerGlobalScopeAttribute);
- attr = new CustomAttributeBuilder (t.GetConstructor (new Type [] {}),
- new object [] {});
- this.typeBuilder.SetCustomAttribute (attr);
- }
-
-
- internal void EmitJScript0Cons ()
- {
- ConstructorBuilder consBuilder;
-
- consBuilder = typeBuilder.DefineConstructor (MethodAttributes.Public,
- CallingConventions.Standard,
- new Type [] {typeof (Microsoft.JScript.GlobalScope)});
-
- this.ilGen = consBuilder.GetILGenerator ();
-
- this.ilGen.Emit (OpCodes.Ldarg_0);
- this.ilGen.Emit (OpCodes.Ldarg_1);
- this.ilGen.Emit (OpCodes.Dup);
- this.ilGen.Emit (OpCodes.Ldfld,
- typeof (Microsoft.JScript.ScriptObject).GetField ("engine"));
- this.ilGen.Emit (OpCodes.Call,
- typeof (Microsoft.JScript.GlobalScope).GetConstructor (new Type [] {typeof (Microsoft.JScript.GlobalScope), typeof (Microsoft.JScript.Vsa.VsaEngine)}));
- this.ilGen.Emit (OpCodes.Ret);
- }
-
-
- private void EmitJScript0GlobalCode (ASTList program)
- {
- MethodBuilder methodBuilder;
- methodBuilder = this.typeBuilder.DefineMethod ("Global Code",
- MethodAttributes.Public,
- typeof (object),
- null);
-
- this.ilGen = methodBuilder.GetILGenerator ();
-
- this.ilGen.Emit (OpCodes.Ldarg_0);
-
- this.ilGen.Emit (OpCodes.Ldfld,
- typeof (Microsoft.JScript.ScriptObject).GetField ("engine"));
-
- this.ilGen.Emit (OpCodes.Ldarg_0);
-
- this.ilGen.Emit (OpCodes.Call,
- typeof (Microsoft.JScript.Vsa.VsaEngine).GetMethod ("PushScriptObject", new Type [] {typeof (Microsoft.JScript.ScriptObject)}));
-
-
- // program.Visit (this, null);
-
-
- this.ilGen.Emit (OpCodes.Ldsfld,
- typeof (Microsoft.JScript.Empty).GetField ("Value"));
-
- this.ilGen.Emit (OpCodes.Ldarg_0);
-
- this.ilGen.Emit (OpCodes.Ldfld,
- typeof (Microsoft.JScript.ScriptObject).GetField ("engine"));
-
- this.ilGen.Emit (OpCodes.Call,
- typeof (Microsoft.JScript.Vsa.VsaEngine).GetMethod ("PopScriptObject"));
-
- this.ilGen.Emit (OpCodes.Pop);
- this.ilGen.Emit (OpCodes.Ret);
- }
-
-
-
-
- public void EmitJScript0 (ASTList program)
- {
- this.EmitJScript0Type ();
- this.EmitJScript0Cons ();
- this.EmitJScript0GlobalCode (program);
-
- this.typeBuilder.CreateType ();
- }
-
-
- //
- // JScript Main class construction
- //
-
- private void EmitJScriptMainType ()
- {
- this.typeBuilder = moduleBuilder.DefineType ("JScript Main",
- TypeAttributes.Public);
-
- this.typeBuilder.SetParent (typeof (System.Object));
- }
-
-
- private void EmitJScriptMainCons ()
- {
- ConstructorBuilder consBuilder;
- consBuilder = typeBuilder.DefineConstructor (MethodAttributes.Public,
- CallingConventions.Standard,
- new Type [] {});
-
- this.ilGen = consBuilder.GetILGenerator ();
- this.ilGen.Emit (OpCodes.Ldarg_0);
- this.ilGen.Emit (OpCodes.Call,
- typeof (Object).GetConstructor (new Type [] {}));
- this.ilGen.Emit (OpCodes.Ret);
- }
-
-
- private void EmitJScriptMainFunction ()
- {
- MethodBuilder methodBuilder;
- methodBuilder = typeBuilder.DefineMethod ("Main",
- MethodAttributes.Public |
- MethodAttributes.Static,
- typeof (void),
- new Type [] {typeof (String [])});
-
- methodBuilder.SetCustomAttribute (new CustomAttributeBuilder
- (typeof (STAThreadAttribute).GetConstructor (new Type [] {}),
- new object [] {}));
-
-
- this.ilGen = methodBuilder.GetILGenerator ();
-
- // declare local vars
- this.ilGen.DeclareLocal (typeof (Microsoft.JScript.GlobalScope));
-
- this.ilGen.Emit (OpCodes.Ldc_I4_1);
- this.ilGen.Emit (OpCodes.Ldc_I4_1);
- this.ilGen.Emit (OpCodes.Newarr, typeof (string));
- this.ilGen.Emit (OpCodes.Dup);
- this.ilGen.Emit (OpCodes.Ldc_I4_0);
- this.ilGen.Emit (OpCodes.Ldstr,
- "mscorlib, Version=1.0.3300.0, Culture=neutral, Pub" + "licKeyToken=b77a5c561934e089");
- this.ilGen.Emit (OpCodes.Stelem_Ref);
- this.ilGen.Emit (OpCodes.Call,
- typeof (Microsoft.JScript.Vsa.VsaEngine).GetMethod ("CreateEngineAndGetGlobalScope", new Type [] {typeof (bool), typeof (string [])}));
-
- this.ilGen.Emit (OpCodes.Stloc_0);
- this.ilGen.Emit (OpCodes.Ldloc_0);
-
-
- this.ilGen.Emit (OpCodes.Newobj,
- assemblyBuilder.GetType ("JScript 0").GetConstructor (new Type [] {typeof (Microsoft.JScript.GlobalScope)}));
-
- this.ilGen.Emit (OpCodes.Call, assemblyBuilder.GetType ("JScript 0").GetMethod ("Global Code", new Type [] {}));
-
- this.ilGen.Emit (OpCodes.Pop);
- this.ilGen.Emit (OpCodes.Ret);
-
- this.assemblyBuilder.SetEntryPoint (methodBuilder);
-
- }
-
- public void EmitJScriptMain ()
- {
- this.EmitJScriptMainType ();
- this.EmitJScriptMainCons ();
- this.EmitJScriptMainFunction ();
-
- Type t2 = this.typeBuilder.CreateType ();
- }
-
-
-
-
- //
- // Visitor methods, that Emit IL OpCodes for each type of
- // language constructs.
- //
-
- public object VisitASTList (ASTList prog, object obj)
- {
- int size = prog.elems.Count;
-
- // for (int i = 0; i < size; i++)
- // ((AST) prog.elems [i]).Visit (this, obj);
-
- return null;
- }
-
-
- public object VisitVariableDeclaration (VariableDeclaration decl,
- object args)
- {
- throw new NotImplementedException ();
- }
-
-
- public object VisitFunctionDeclaration (FunctionDeclaration decl,
- object args)
- {
- throw new NotImplementedException ();
- }
-
-
- public object VisitBlock (Block b, object args)
- {
- throw new NotImplementedException ();
- }
-
-
- public object VisitEval (Eval e, object args)
- {
- throw new NotImplementedException ();
- }
-
-
- public object VisitForIn (ForIn forIn, object args)
- {
- throw new NotImplementedException ();
+ type_builder = type;
}
+ }
+ public class CodeGenerator {
- public object VisitFunctionExpression (FunctionExpression fexp,
- object args)
- {
- throw new NotImplementedException ();
- }
+ private static string MODULE = "JScript Module";
+ internal static string mod_name;
+ internal static AppDomain app_domain;
+ internal static AssemblyName assembly_name;
+ internal static AssemblyBuilder assembly_builder;
+ internal static ModuleBuilder module_builder;
- public object VisitImport (Import imp, object args)
+ internal static void Init (string file_name)
{
- throw new NotImplementedException ();
- }
+ app_domain = Thread.GetDomain ();
+ assembly_name = new AssemblyName ();
+ assembly_name.Name = trim_extension (file_name);
- public object VisitPackage (Package pkg, object args)
- {
- throw new NotImplementedException ();
- }
+ mod_name = MODULE;
+ assembly_builder = app_domain.DefineDynamicAssembly (
+ assembly_name,
+ AssemblyBuilderAccess.RunAndSave);
- public object VisitScriptBlock (ScriptBlock sblock, object args)
- {
- throw new NotImplementedException ();
+ module_builder = assembly_builder.DefineDynamicModule (
+ mod_name,
+ assembly_name.Name + ".exe",
+ false);
}
-
- public object VisitThrow (Throw t, object args)
+ internal static string trim_extension (string file_name)
{
- throw new NotImplementedException ();
- }
-
+ int index = file_name.IndexOf ('.');
- public object VisitTry (Try t, object args)
- {
- throw new NotImplementedException ();
+ if (index < 0)
+ return file_name;
+ else
+ return file_name.Substring (0, index);
}
-
- public object VisitWith (With w, object args)
+ internal static void Save (string target_name)
{
- throw new NotImplementedException ();
+ assembly_builder.Save (target_name);
}
-
- public object VisitPrint (Print p, object args)
+ internal static void Emit (AST prog)
{
- StringLiteral sl = p.Exp as StringLiteral;
+ if (prog == null)
+ return;
- // sl.Visit (this, args);
+ TypeBuilder type_builder;
+ type_builder = module_builder.DefineType ("JScript 0");
- this.ilGen.Emit (OpCodes.Call,
- typeof (Microsoft.JScript.ScriptStream).GetMethod ("WriteLine", new Type [] {typeof (string)}));
+ EmitContext ec = new EmitContext (type_builder);
- return null;
- }
+ prog.Emit (ec);
-
- //
- // Literals
- //
-
- public object VisitArrayLiteral (ArrayLiteral al, object args)
- {
- throw new NotImplementedException ();
+ ec.type_builder.CreateType ();
}
-
- public object VisitStringLiteral (StringLiteral sl, object args)
+ public static void Run (string file_name, AST prog)
{
- this.ilGen.Emit (OpCodes.Ldstr, sl.Str);
+ CodeGenerator.Init (file_name);
+ CodeGenerator.Emit (prog);
- return null;
- }
+ CodeGenerator.Save (trim_extension (file_name) +
+ ".exe");
+ }
}
}
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