/*
General interface from R to invoke a COM method or property accessor.
@type integer giving the invocation kind/style (e.g. property get, property put, invoke)
@sreturn logical indicating whether the return value should be converted or not.
*/
__declspec(dllexport) SEXP
R_Invoke(SEXP obj, SEXP methodName, SEXP args, SEXP stype, SEXP sreturn, SEXP ids)
{
WORD type = R_integerScalarValue(stype, 0);
WORD doReturn = R_logicalScalarValue(sreturn, 0);
return(R_COM_Invoke(obj, methodName, args, type, doReturn, ids));
}
SEXP
R_create(SEXP className, SEXP scontext)
{
SEXP ans;
CLSID classId;
IID refId = IID_IDispatch;
IUnknown *unknown, *punknown = NULL;
HRESULT hr = R_getCLSIDFromString(className, &classId);
if(FAILED(hr))
COMError(hr);
WORD context = R_integerScalarValue(scontext, 0);
SCODE sc = CoCreateInstance(classId, punknown, context, refId, (void **) &unknown);
if(FAILED(sc)) {
TCHAR buf[512];
GetScodeString(sc, buf, sizeof(buf)/sizeof(buf[0]));
PROBLEM "Failed to create COM object: %s", buf
ERROR;
}
//Already AddRef in the CoCreateInstance
// so no need to do it now ( unknown->AddRef())
ans = R_createRCOMUnknownObject((void *) unknown, "COMIDispatch");
return(ans);
}
HRESULT
R_convertRObjectToDCOM(SEXP obj, VARIANT *var)
{
HRESULT status;
int type = R_typeof(obj);
if(!var)
return(S_FALSE);
#ifdef RDCOM_VERBOSE
errorLog("Type of argument %d\n", type);
#endif
if(type == EXTPTRSXP && EXTPTR_TAG(obj) == Rf_install("R_VARIANT")) {
VARIANT *tmp;
tmp = (VARIANT *) R_ExternalPtrAddr(obj);
if(tmp) {
//XXX
VariantCopy(var, tmp);
return(S_OK);
}
}
if(ISCOMIDispatch(obj)) {
IDispatch *ptr;
ptr = (IDispatch *) derefRIDispatch(obj);
V_VT(var) = VT_DISPATCH;
V_DISPATCH(var) = ptr;
//XX
ptr->AddRef();
return(S_OK);
}
if(ISSInstanceOf(obj, "COMDate")) {
double val;
val = NUMERIC_DATA(GET_SLOT(obj, Rf_install(".Data")))[0];
V_VT(var) = VT_DATE;
V_DATE(var) = val;
return(S_OK);
} else if(ISSInstanceOf(obj, "COMCurrency")) {
double val;
val = NUMERIC_DATA(GET_SLOT(obj, Rf_install(".Data")))[0];
V_VT(var) = VT_R8;
V_R8(var) = val;
VariantChangeType(var, var, 0, VT_CY);
return(S_OK);
} else if(ISSInstanceOf(obj, "COMDecimal")) {
double val;
val = NUMERIC_DATA(GET_SLOT(obj, Rf_install(".Data")))[0];
V_VT(var) = VT_R8;
V_R8(var) = val;
VariantChangeType(var, var, 0, VT_DECIMAL);
return(S_OK);
}
/* We have a complex object and we are not going to try to convert it directly
but instead create an COM server object to represent it to the outside world. */
if((type == VECSXP && Rf_length(GET_NAMES(obj))) || Rf_length(GET_CLASS(obj)) > 0 || isMatrix(obj)) {
status = createGenericCOMObject(obj, var);
if(status == S_OK)
return(S_OK);
}
if(Rf_length(obj) == 0) {
V_VT(var) = VT_VOID;
return(S_OK);
}
if(type == VECSXP || Rf_length(obj) > 1) {
createRDCOMArray(obj, var);
return(S_OK);
}
switch(type) {
case STRSXP:
V_VT(var) = VT_BSTR;
V_BSTR(var) = AsBstr(getRString(obj, 0));
break;
case INTSXP:
V_VT(var) = VT_I4;
V_I4(var) = R_integerScalarValue(obj, 0);
break;
case REALSXP:
V_VT(var) = VT_R8;
V_R8(var) = R_realScalarValue(obj, 0);
break;
case LGLSXP:
V_VT(var) = VT_BOOL;
V_BOOL(var) = R_logicalScalarValue(obj, 0) ? VARIANT_TRUE : VARIANT_FALSE;
break;
case VECSXP:
break;
}
return(S_OK);
}
