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 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);
}