public static void GenerateLoop(GenerationContextBase context, LocalBuilder countLocal, LocalBuilder loopControlLocal, Action loopAction, bool reversed = false)
{
var loopLabel = context.Generator.DefineLabel();
var loopFinishLabel = context.Generator.DefineLabel();
if (reversed)
{
context.Generator.PushLocalValueOntoStack(countLocal);
context.Generator.PushIntegerOntoStack(1);
context.Generator.Emit(OpCodes.Sub); // put <<countLocal>> - 1 on stack
}
else
{
context.Generator.PushIntegerOntoStack(0); // put <<0> on stack
}
context.Generator.StoreLocalValueFromStack(loopControlLocal); // initialize <<loopControl>> variable using value from stack
context.Generator.MarkLabel(loopLabel);
context.Generator.PushLocalValueOntoStack(loopControlLocal);
if (reversed)
{
context.Generator.PushIntegerOntoStack(-1);
}
else
{
context.Generator.PushLocalValueOntoStack(countLocal);
}
context.Generator.Emit(OpCodes.Beq, loopFinishLabel);
loopAction();
context.Generator.PushLocalValueOntoStack(loopControlLocal);
context.Generator.PushIntegerOntoStack(reversed ? -1 : 1);
context.Generator.Emit(OpCodes.Add);
context.Generator.StoreLocalValueFromStack(loopControlLocal); // change <<loopControl>> variable by one
context.Generator.Emit(OpCodes.Br, loopLabel); // jump to the next loop iteration
context.Generator.MarkLabel(loopFinishLabel);
}
public static void DumpToLibrary <T>(GenerationContextBase context, Action <GenerationContextBase> generateCodeAction, string postfix = null)
{
var invokeMethod = typeof(T).GetMethod("Invoke");
var returnType = invokeMethod.ReturnType;
var argumentTypes = invokeMethod.GetParameters().Select(x => x.ParameterType).ToArray();
if (postfix != null)
{
foreach (var c in new[] { '`', '<', '>', ',', '[', ']' })
{
postfix = postfix.Replace(c, '_');
}
}
var name = string.Format("{0}_{1}", counter++, postfix);
var aname = new AssemblyName(name);
var assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(aname, AssemblyBuilderAccess.Save);
var customAttribute = new CustomAttributeBuilder(
typeof(DebuggableAttribute).GetConstructor(new[] { typeof(DebuggableAttribute.DebuggingModes) }),
new object[] { DebuggableAttribute.DebuggingModes.DisableOptimizations | DebuggableAttribute.DebuggingModes.Default }
);
assembly.SetCustomAttribute(customAttribute);
var module = assembly.DefineDynamicModule(aname.Name, aname.Name + ".dll", true);
var type = module.DefineType("T");
var method = type.DefineMethod("M", MethodAttributes.Public, returnType, argumentTypes);
var generator = method.GetILGenerator();
generateCodeAction(context.WithGenerator(generator));
generator.Emit(OpCodes.Ret);
type.CreateType();
assembly.Save(aname.Name + ".dll");
}
public static void GenerateLoop(GenerationContextBase context, LocalBuilder countLocal, Action <LocalBuilder> loopAction, bool reversed = false)
{
var loopControlLocal = context.Generator.DeclareLocal(typeof(int));
GenerateLoop(context, countLocal, loopControlLocal, () => loopAction(loopControlLocal), reversed);
}