/// <summary>
/// Given an offset of 3 and a value of 2, generates:
/// buffer[index + 3] = 2;
/// </summary>
/// <param name="ilg"></param>
/// <param name="array"></param>
/// <param name="ptr"></param>
public void Emit(ILGenerator ilg, LocalBuilder array, LocalBuilder ptr)
{
ilg.Emit(OpCodes.Ldloc, array);
if (Constant != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Constant.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
if (Offset != 0)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Math.Abs(Offset));
if (Offset > 0)
{
ilg.Emit(OpCodes.Add);
}
else
{
ilg.Emit(OpCodes.Sub);
}
}
}
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Value);
ilg.Emit(OpCodes.Stelem_I1);
}
private void IncDec(ILGenerator ilg, LocalBuilder array, LocalBuilder ptr, ConstantValue constantValue, int offset, int step, OpCode addSub)
{
ilg.Emit(OpCodes.Ldloc, array);
if (constantValue != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, constantValue.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
if (offset != 0)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Math.Abs(offset));
if (offset > 0)
{
ilg.Emit(OpCodes.Add);
}
else
{
ilg.Emit(OpCodes.Sub);
}
}
}
ilg.Emit(OpCodes.Ldloc, array);
if (constantValue != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, constantValue.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
if (offset != 0)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Math.Abs(offset));
if (offset > 0)
{
ilg.Emit(OpCodes.Add);
}
else
{
ilg.Emit(OpCodes.Sub);
}
}
}
ilg.Emit(OpCodes.Ldelem_U1);
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, step);
ilg.Emit(addSub);
ilg.Emit(OpCodes.Conv_U1);
ilg.Emit(OpCodes.Stelem_I1);
}
/// <summary>
/// Given an offset of 2, generates:
/// Console.Write((char) buffer[index + 2]);
///
/// TODO: This method is missing the Offset usage
/// </summary>
/// <param name="ilg"></param>
/// <param name="array"></param>
/// <param name="ptr"></param>
public void Emit(ILGenerator ilg, LocalBuilder array, LocalBuilder ptr)
{
for (int i = 0; i < Repeated; i++)
{
ilg.Emit(OpCodes.Ldloc, array);
if (Constant != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Constant.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
}
ilg.Emit(OpCodes.Ldelem_U1);
ilg.EmitCall(OpCodes.Call, consoleWriteMethodInfo, null);
}
}
/// <summary>
/// Given an offset of 2 and scalar of 3, generates:
/// buffer[index + 2] = (byte) (buffer[index + 2] + (buffer[index] * 3));
///
/// If the scalar is 1, no multiplication is done:
/// buffer[index + 2] = (byte) (buffer[index + 2] + buffer[index]);
/// </summary>
public void Emit(ILGenerator ilg, LocalBuilder array, LocalBuilder ptr)
{
ilg.Emit(OpCodes.Ldloc, array);
if (Constant != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Constant.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
if (Offset != 0)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Math.Abs(Offset));
if (Offset > 0)
{
ilg.Emit(OpCodes.Add);
}
else
{
ilg.Emit(OpCodes.Sub);
}
}
}
ilg.Emit(OpCodes.Ldloc, array);
if (Constant != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Constant.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
if (Offset != 0)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Math.Abs(Offset));
if (Offset > 0)
{
ilg.Emit(OpCodes.Add);
}
else
{
ilg.Emit(OpCodes.Sub);
}
}
}
ilg.Emit(OpCodes.Ldelem_U1);
ilg.Emit(OpCodes.Ldloc, array);
if (MultiplicationConstant != null)
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, MultiplicationConstant.Value);
}
else
{
ilg.Emit(OpCodes.Ldloc, ptr);
}
ilg.Emit(OpCodes.Ldelem_U1);
if (Scalar != 1) // multiply only if the scalar is != 1
{
ILGeneratorHelpers.Load32BitIntegerConstant(ilg, Scalar);
ilg.Emit(OpCodes.Mul);
}
ilg.Emit(OpCodes.Add);
ilg.Emit(OpCodes.Conv_U1); // Cast the whole expression to byte
ilg.Emit(OpCodes.Stelem_I1);
}
