/// <summary>
/// Builds the return value of a call
/// </summary>
/// <param name="outParams">The out parameters indices, or null. See <see cref="BuildArgumentList" />.</param>
/// <param name="pars">The parameters passed to the function.</param>
/// <param name="retv">The return value from the function. Use DynValue.Void if the function returned no value.</param>
/// <returns>A DynValue to be returned to scripts</returns>
protected static R_VAL BuildReturnValue(RubyState state, List <int> outParams, object[] pars, object retv)
{
if (outParams == null)
{
return(RubyState.ObjectToValue(state, retv));
}
else
{
R_VAL[] rets = new R_VAL[outParams.Count + 1];
if (retv is R_VAL && R_VAL.IsNil(( R_VAL )retv))
{
rets[0] = R_VAL.NIL;
}
else
{
rets[0] = RubyState.ObjectToValue(state, retv);
}
for (int i = 0; i < outParams.Count; i++)
{
rets[i + 1] = RubyState.ObjectToValue(state, pars[outParams[i]]);
}
R_VAL ary = RubyDLL.r_ary_new();
foreach (var p in rets)
{
RubyDLL.r_ary_push(state, ary, p);
}
return(ary);
}
}
/// <summary>
/// Builds the argument list.
/// </summary>
/// <param name="state">The ruby state.</param>
/// <param name="obj">The object.</param>
/// <param name="args">The arguments.</param>
/// <param name="outParams">Output: A list containing the indices of all "out" parameters, or null if no out parameters are specified.</param>
/// <returns>The arguments, appropriately converted.</returns>
protected virtual object[] BuildArgumentList(RubyState state, object obj, CallbackArguments args, out List <int> outParams)
{
ParameterDescriptor[] parameters = Parameters;
object[] pars = new object[parameters.Length];
int j = args.IsMethodCall ? 1 : 0;
outParams = null;
for (int i = 0; i < pars.Length; i++)
{
// keep track of out and ref params
if (parameters[i].Type.IsByRef)
{
if (outParams == null)
{
outParams = new List <int> ();
}
outParams.Add(i);
}
// if an ext method, we have an obj -> fill the first param
if (ExtensionMethodType != null && obj != null && i == 0)
{
pars[i] = obj;
continue;
}
else if (parameters[i].Type == typeof(CallbackArguments))
{
pars[i] = args.SkipMethodCall();
}
// else, ignore out params
else if (parameters[i].IsOut)
{
pars[i] = null;
}
else if (i == parameters.Length - 1 && VarArgsArrayType != null)
{
List <R_VAL> extraArgs = new List <R_VAL> ();
while (true)
{
var arg = args.RawGet(j, false);
j += 1;
if (!R_VAL.IsNil(arg))
{
extraArgs.Add(arg);
}
else
{
break;
}
}
// here we have to worry we already have an array.. damn. We only support this for userdata.
// remains to be analyzed what's the correct behavior here. For example, let's take a params object[]..
// given a single table parameter, should it use it as an array or as an object itself ?
if (extraArgs.Count == 1)
{
R_VAL arg = extraArgs[0];
if (R_VAL.IsData(arg))
{
// if ( Framework.Do.IsAssignableFrom ( VarArgsArrayType, arg.UserData.Object.GetType () ) ) {
// pars[ i ] = RubyDLL.ValueToDataObject< object > ( state, arg, RubyState.DATA_TYPE_PTR );
pars[i] = RubyState.ValueToRefObject(state, arg, DataTypePtr);
continue;
// }
}
}
// ok let's create an array, and loop
Array vararg = Array.CreateInstance(VarArgsElementType, extraArgs.Count);
for (int ii = 0; ii < extraArgs.Count; ii++)
{
vararg.SetValue(RubyState.ValueToObjectOfType(state, extraArgs[ii], DataTypePtr,
VarArgsElementType,
null, false), ii);
}
pars[i] = vararg;
}
// else, convert it
else
{
var arg = args.RawGet(j, false);
pars[i] = RubyState.ValueToObjectOfType(state, arg, DataTypePtr, parameters[i].Type,
parameters[i].DefaultValue, parameters[i].HasDefaultValue);
j += 1;
}
}
return(pars);
}