/// <summary>Loads the argument at index i onto the evaluation stack.</summary>
public static ILSugar LoadArgument(this ILSugar il, int i)
{
switch (i)
{
case 0:
il.Ldarg_0();
break;
case 1:
il.Ldarg_1();
break;
case 2:
il.Ldarg_2();
break;
case 3:
il.Ldarg_3();
break;
default:
if (i <= byte.MaxValue)
{
il.Ldarg_S((byte)i);
}
else
{
il.Ldarg(i);
}
break;
}
return(il);
}
/// <summary>Loads the local variable at index i onto the evaluation stack.</summary>
public static ILSugar LoadVariable(this ILSugar il, int i)
{
switch (i)
{
case 0:
il.Ldloc_0();
break;
case 1:
il.Ldloc_1();
break;
case 2:
il.Ldloc_2();
break;
case 3:
il.Ldloc_3();
break;
default:
if (i <= byte.MaxValue)
{
il.Ldloc_S((byte)i);
}
else
{
il.Ldloc(i);
}
break;
}
return(il);
}
/// <summary> Branches to the specified label if a string on the evaluation stacks equals the given literal value.</summary>
public static ILSugar GotoIfStringEquals(this ILSugar il, string literal, Label @goto)
{
var ifStringEquals = il.Ldstr(literal).Call(KnownMethods.StringEquals);
ifStringEquals
.Brtrue(@goto); // TODO calculate offsets dynamically to call Brtrue_S vs. Brtrue, not worth it right now.
return(il);
}
/// <summary>If the given type is a value type, converts it into an object reference (type O)</summary>
public static ILSugar MaybeBox(this ILSugar il, Type type)
{
if (type.IsValueType)
{
il.Box(type);
}
return(il);
}
/// <summary>Pushes the value of i onto the evaluation stack as an int32.</summary>
public static ILSugar LoadConstant(this ILSugar il, long i)
{
switch (i)
{
case 0:
il.Ldc_I4_0();
break;
case 1:
il.Ldc_I4_1();
break;
case 2:
il.Ldc_I4_2();
break;
case 3:
il.Ldc_I4_3();
break;
case 4:
il.Ldc_I4_4();
break;
case 5:
il.Ldc_I4_5();
break;
case 6:
il.Ldc_I4_6();
break;
case 7:
il.Ldc_I4_7();
break;
case 8:
il.Ldc_I4_8();
break;
default:
if (i <= byte.MaxValue)
{
il.Ldc_I4_S((byte)i);
}
else if (i <= int.MaxValue)
{
il.Ldc_I4((int)i);
}
else
{
il.Ldc_I8(i);
}
break;
}
return(il);
}
public static ILSugar CallOrCallvirt(this ILSugar il, Type type, MethodInfo method)
{
if (method.IsVirtual && !type.IsValueType)
{
il.Callvirt(method);
}
else
{
il.Call(method);
}
return(il);
}
public static ILSugar CastOrUnboxAny(this ILSugar il, Type type)
{
if (type == typeof(object))
{
return(il);
}
if (type.IsValueType)
{
il.Unbox_Any(type);
}
else
{
il.Castclass(type);
}
return(il);
}
internal static void EmitCallMethod(this ILSugar il, MethodInfo method)
{
var type = method.DeclaringType ?? throw new NullReferenceException();
if (!method.IsStatic)
{
il.Ldarg_1(); // target
il.Unbox_Any(type);
var @this = il.DeclareLocal(type);
il.Stloc(@this);
if (type.IsValueType)
{
il.Ldloca(@this);
}
else
{
il.Ldloc(@this);
}
}
var parameters = method.GetParameters();
if (parameters.Length > 0)
{
for (var i = 0; i < parameters.Length; i++)
{
il.Ldarg_2(); // args
il.LoadConstant(i); // i
il.Ldelem_Ref(); // args[i]
var parameterType = parameters[i].ParameterType;
var byRef = parameterType.IsByRef;
if (byRef)
{
parameterType = parameterType.GetElementType();
}
il.Unbox_Any(parameterType);
var arg = il.DeclareLocal(parameterType);
il.Stloc(arg);
if (byRef)
{
il.Ldloca(arg);
}
else
{
il.Ldloc(arg);
}
}
}
il.CallOrCallvirt(type, method);
for (var i = 0; i < parameters.Length; i++)
{
var parameterType = parameters[i].ParameterType;
if (!parameterType.IsByRef)
{
continue;
}
il.Ldarg_2();
il.Ldc_I4(i);
il.Ldloc(i + (method.IsStatic ? 0 : 1));
parameterType = parameterType.GetElementType() ?? parameterType;
if (parameterType.IsValueType)
{
il.Box(parameterType);
}
il.Stelem_Ref();
}
if (method.ReturnType == typeof(void))
{
il.Ldnull();
}
else
{
il.MaybeBox(method.ReturnType);
}
il.Ret();
}
