////////////////////////////////////////////////////////////////////////
//
// Client Side Errors - translate a COM failure to a Python exception
//
////////////////////////////////////////////////////////////////////////
PyObject *PyCom_BuildPyException(HRESULT errorhr, IUnknown *pUnk /* = NULL */, REFIID iid /* = IID_NULL */)
{
PyObject *obEI = NULL;
TCHAR scodeStringBuf[512];
GetScodeString(errorhr, scodeStringBuf, sizeof(scodeStringBuf)/sizeof(scodeStringBuf[0]));
#ifndef MS_WINCE // WINCE doesnt appear to have GetErrorInfo() - compiled, but doesnt link!
if (pUnk != NULL) {
assert(iid != IID_NULL); // If you pass an IUnknown, you should pass the specific IID.
// See if it supports error info.
ISupportErrorInfo *pSEI;
HRESULT hr;
Py_BEGIN_ALLOW_THREADS
hr = pUnk->QueryInterface(IID_ISupportErrorInfo, (void **)&pSEI);
if (SUCCEEDED(hr)) {
hr = pSEI->InterfaceSupportsErrorInfo(iid);
pSEI->Release(); // Finished with this object
}
Py_END_ALLOW_THREADS
if (SUCCEEDED(hr)) {
IErrorInfo *pEI;
Py_BEGIN_ALLOW_THREADS
hr=GetErrorInfo(0, &pEI);
Py_END_ALLOW_THREADS
if (hr==S_OK) {
obEI = PyCom_PyObjectFromIErrorInfo(pEI, errorhr);
PYCOM_RELEASE(pEI);
}
}
}
void WINAPI _com_issue_errorex(HRESULT hr, IUnknown *punk, REFIID riid)
{
void *pv;
IErrorInfo *perrinfo = NULL;
if (SUCCEEDED(punk->QueryInterface(riid, &pv)))
{
ISupportErrorInfo *pserrinfo = static_cast<ISupportErrorInfo *>(pv);
if (pserrinfo->InterfaceSupportsErrorInfo(riid) == S_OK)
(void)GetErrorInfo(0, &perrinfo);
pserrinfo->Release();
}
com_error_handler(hr, perrinfo);
}
/* Determines whether we can use the error information from the
source object and if so, throws that as an error.
If serr is non-NULL, then the error is not thrown in R
but a COMSErrorInfo object is returned with the information in it.
*/
HRESULT
checkErrorInfo(IUnknown *obj, HRESULT status, SEXP *serr)
{
HRESULT hr;
ISupportErrorInfo *info;
fprintf(stderr, "<checkErrorInfo> %X \n", (unsigned int) status);
if(serr)
*serr = NULL;
hr = obj->QueryInterface(IID_ISupportErrorInfo, (void **)&info);
if(hr != S_OK) {
fprintf(stderr, "No support for ISupportErrorInfo\n");fflush(stderr);
return(hr);
}
info->AddRef();
hr = info->InterfaceSupportsErrorInfo(IID_IDispatch);
info->Release();
if(hr != S_OK) {
fprintf(stderr, "No support for InterfaceSupportsErrorInfo\n");fflush(stderr);
return(hr);
}
IErrorInfo *errorInfo;
hr = GetErrorInfo(0L, &errorInfo);
if(hr != S_OK) {
/* fprintf(stderr, "GetErrorInfo failed\n");fflush(stderr); */
COMError(status);
return(hr);
}
/* So there is some information for us. Use it. */
SEXP klass, ans, tmp;
BSTR ostr;
char *str;
errorInfo->AddRef();
if(serr) {
PROTECT(klass = MAKE_CLASS("SCOMErrorInfo"));
PROTECT(ans = NEW(klass));
PROTECT(tmp = NEW_CHARACTER(1));
errorInfo->GetSource(&ostr);
SET_STRING_ELT(tmp, 0, COPY_TO_USER_STRING(FromBstr(ostr)));
SET_SLOT(ans, Rf_install("source"), tmp);
UNPROTECT(1);
PROTECT(tmp = NEW_CHARACTER(1));
errorInfo->GetDescription(&ostr);
SET_STRING_ELT(tmp, 0, COPY_TO_USER_STRING(str = FromBstr(ostr)));
SET_SLOT(ans, Rf_install("description"), tmp);
UNPROTECT(1);
PROTECT(tmp = NEW_NUMERIC(1));
NUMERIC_DATA(tmp)[0] = status;
SET_SLOT(ans, Rf_install("status"), tmp);
*serr = ans;
UNPROTECT(3);
errorInfo->Release();
PROBLEM "%s", str
WARN;
} else {
errorInfo->GetDescription(&ostr);
str = FromBstr(ostr);
errorInfo->GetSource(&ostr);
errorInfo->Release();
PROBLEM "%s (%s)", str, FromBstr(ostr)
ERROR;
}
return(hr);
}
/********************************************************************
SqlGetErrorInfo - gets error information from the last SQL function call
NOTE: pbstrErrorSource and pbstrErrorDescription are optional
********************************************************************/
extern "C" HRESULT DAPI SqlGetErrorInfo(
__in IUnknown* pObjectWithError,
__in REFIID IID_InterfaceWithError,
__in DWORD dwLocaleId,
__out_opt BSTR* pbstrErrorSource,
__out_opt BSTR* pbstrErrorDescription
)
{
HRESULT hr = S_OK;
Assert(pObjectWithError);
// interfaces needed to extract error information out
ISupportErrorInfo* pISupportErrorInfo = NULL;
IErrorInfo* pIErrorInfoAll = NULL;
IErrorRecords* pIErrorRecords = NULL;
IErrorInfo* pIErrorInfoRecord = NULL;
// only ask for error information if the interface supports it.
hr = pObjectWithError->QueryInterface(IID_ISupportErrorInfo,(void**)&pISupportErrorInfo);
ExitOnFailure(hr, "No error information was found for object.");
hr = pISupportErrorInfo->InterfaceSupportsErrorInfo(IID_InterfaceWithError);
ExitOnFailure(hr, "InterfaceWithError is not supported for object with error");
// ignore the return of GetErrorInfo it can succeed and return a NULL pointer in pIErrorInfoAll anyway
hr = ::GetErrorInfo(0, &pIErrorInfoAll);
ExitOnFailure(hr, "failed to get error info");
if (S_OK == hr && pIErrorInfoAll)
{
// see if it's a valid OLE DB IErrorInfo interface that exposes a list of records
hr = pIErrorInfoAll->QueryInterface(IID_IErrorRecords, (void**)&pIErrorRecords);
if (SUCCEEDED(hr))
{
ULONG cErrors = 0;
pIErrorRecords->GetRecordCount(&cErrors);
// get the error information for each record
for (ULONG i = 0; i < cErrors; ++i)
{
hr = pIErrorRecords->GetErrorInfo(i, dwLocaleId, &pIErrorInfoRecord);
if (SUCCEEDED(hr))
{
if (pbstrErrorSource)
{
pIErrorInfoRecord->GetSource(pbstrErrorSource);
}
if (pbstrErrorDescription)
{
pIErrorInfoRecord->GetDescription(pbstrErrorDescription);
}
ReleaseNullObject(pIErrorInfoRecord);
break; // TODO: return more than one error in the future!
}
}
ReleaseNullObject(pIErrorRecords);
}
else // we have a simple error record
{
if (pbstrErrorSource)
{
pIErrorInfoAll->GetSource(pbstrErrorSource);
}
if (pbstrErrorDescription)
{
pIErrorInfoAll->GetDescription(pbstrErrorDescription);
}
}
}
else
{
hr = E_NOMOREITEMS;
}
LExit:
ReleaseObject(pIErrorInfoRecord);
ReleaseObject(pIErrorRecords);
ReleaseObject(pIErrorInfoAll);
ReleaseObject(pISupportErrorInfo);
return hr;
}
int _tmain(int argc, _TCHAR* argv[])
{
HRESULT hr; // COM 戻り値用変数
IClassTest* pClassTest; // COMインターフェイスポインタ
// COMの初期化 ◆◆追加
hr = ::CoInitialize(NULL);
if(FAILED(hr)){
printf("CoInitialize 失敗\n");
return 0;
}
// ----------------------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------------------
// <以下のコードは、アーリーバインディング方式での呼び出し>
// インスタンスの作成(CLSID:[CLSID_ClassTest]とIID:[IID_IClassTest]を指定して、ポインタを取得)
hr = ::CoCreateInstance((REFCLSID) CLSID_ClassTest, 0, CLSCTX_INPROC_SERVER,
(REFIID) IID_IClassTest, (LPVOID*)&pClassTest);
if(FAILED(hr)){
printf("CoCreateInstance 失敗\n");
return 0;
}
// BSTRを処理する場合は、_bstr_tが楽（解放など）
// http://mzs184.blogspot.com/2008/04/bstrbstrt.html
// _bstr_t Class
// http://msdn.microsoft.com/ja-jp/library/zthfhkd6.aspx
// _bstr_t::operator =
// http://msdn.microsoft.com/ja-jp/library/7bh2f8sk.aspx
_bstr_t bstrText = L"だいすけ";
_bstr_t bstrCaption = L"にしの";
_bstr_t bstrRetVal;
// メソッド呼び出し
// _bstr_t::wchar_t*, _bstr_t::char*
// BSTRはOLECHAR（= WCHAR）のポインタなので適用可能。
// http://msdn.microsoft.com/ja-jp/library/btdzb8eb.aspx
// _bstr_t::GetAddress
// http://msdn.microsoft.com/ja-jp/library/t2x13207.aspx
hr = pClassTest->MethodTest(bstrText, bstrCaption, bstrRetVal.GetAddress());
if(FAILED(hr)){
printf("MethodTest 失敗\n");
return 0;
}
MessageBox(NULL, bstrRetVal, L"戻り値", MB_OK);
// bstrRetValをクリア（DetachしてSysFreeString）
// _bstr_t::Detach
// http://msdn.microsoft.com/en-us/library/3c73x1sf.aspx
// SysFreeString
// http://msdn.microsoft.com/ja-jp/site/ms221481
BSTR bstr = bstrRetVal.Detach();
if(bstr != NULL)
{
SysFreeString(bstr);
}
// bstrCaptionの再設定
bstrCaption = L"";
// メソッド呼び出し（同上）
hr = pClassTest->MethodTest(bstrText, bstrCaption, bstrRetVal.GetAddress());
// Dr.GUI Online
// Dr.GUI と COM オートメーション、
// 第 3 部：続 COM のすばらしきデータ型
// http://msdn.microsoft.com/ja-jp/library/cc482694.aspx
// ISupportErrorInfo、IErrorInfoでエラー情報を取得
if(FAILED(hr))
{
// IID_ISupportErrorInfoインターフェイスを取得
ISupportErrorInfo *pSupport;
hr = pClassTest->QueryInterface(IID_ISupportErrorInfo, (void**)&pSupport);
if (SUCCEEDED(hr)) {
hr = pSupport->InterfaceSupportsErrorInfo(IID_IClassTest);
if (hr == S_OK) { // can't use SUCCEEDED here! S_FALSE succeeds!
IErrorInfo *pErrorInfo;
hr = GetErrorInfo(0, &pErrorInfo);
if (SUCCEEDED(hr)) {
// FINALLY can call methods on pErrorInfo! ...and handle the error!
_bstr_t bstrErrorDescription;
pErrorInfo->GetDescription(bstrErrorDescription.GetAddress());
// エラー情報
MessageBox(NULL, bstrErrorDescription, L"ErrorDescription", MB_OK);
// don't forget to release!
pErrorInfo->Release();
}
}
// don't forget to release!
pSupport->Release();
}
}
// don't forget to release!
pClassTest->Release();
// ----------------------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------------------
// <以下のコードは、レイトバインディング方式での呼び出し>
// CLSID の取得
CLSID clsid;
hr = CLSIDFromProgID(L"VC_COM.ClassTest", &clsid);
if(FAILED(hr)){
printf("CLSIDFromProgID 失敗\n");
return 0;
}
// インスタンスの作成(CLSIDとIID:[IID_IDispatch]を指定して、ポインタを取得)
IDispatch* pDisp = NULL;
hr = ::CoCreateInstance(clsid, NULL, CLSCTX_ALL, IID_IDispatch, (void**)&pDisp);
if(FAILED(hr)){
printf("CoCreateInstance 失敗\n");
return 0;
}
// COMディスパッチ識別子の取得
DISPID dispID;
OLECHAR* wszName = L"MethodTest";
hr = pDisp->GetIDsOfNames(IID_NULL, &wszName, 1, LOCALE_USER_DEFAULT, &dispID);
if(FAILED(hr)){
printf("GetIDsOfNames 失敗\n");
exit(1);
}
// CComVariant クラス（CComVariant は VARIANT 型から派生）
// http://msdn.microsoft.com/ja-jp/library/ac97df2h.aspx
// 引数を VARIANT 配列に設定
CComVariant pvArgs[2];
pvArgs[0] = L"だいすけ";
pvArgs[1] = L"にしの";
// 戻り値を VARIANT変数
CComVariant pvResult;
// DISPPARAMS の設定
DISPPARAMS dispParams;
dispParams.rgvarg = pvArgs;
dispParams.rgdispidNamedArgs = NULL;
dispParams.cArgs = 2;
dispParams.cNamedArgs = 0;
// メソッドにレイトバインド（Invoke）
hr = pDisp->Invoke(dispID, IID_NULL,
LOCALE_USER_DEFAULT, DISPATCH_METHOD,
&dispParams, &pvResult, NULL, NULL);
if(FAILED(hr)){
printf("MethodTest 失敗\n");
return 0;
}
// BSTRで格納されている時、tagVARIANTのメンバ、bstrValで取得可能。
// BSTRはOLECHAR（= WCHAR）のポインタなのでLPWSTRにキャスト可能。
MessageBox(NULL, (LPWSTR)pvResult.bstrVal, L"戻り値", MB_OK);
// don't forget to release!
pDisp->Release();
// ----------------------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------------------
// COMの終了処理 ◆◆追加
::CoUninitialize();
return 0;
}