BOOL CXLAutomation::ExlInvoke(IDispatch *pdisp, LPOLESTR szMember, VARIANTARG * pvargReturn,
WORD wInvokeAction, WORD wFlags)
{
HRESULT hr;
DISPPARAMS dispparams;
unsigned int uiArgErr;
EXCEPINFO excep;
// Get the IDs for the member and its arguments. GetIDsOfNames expects the
// member name as the first name, followed by argument names (if any).
m_alpszArgNames[0] = szMember;
hr = pdisp->GetIDsOfNames( IID_NULL, m_alpszArgNames,
1 + m_iNamedArgCount, LOCALE_SYSTEM_DEFAULT, m_aDispIds);
if (FAILED(hr))
{
if (!(wFlags & DISP_NOSHOWEXCEPTIONS))
ShowException(szMember, hr, NULL, 0);
return FALSE;
}
if (pvargReturn != NULL)
ClearVariant(pvargReturn);
// if doing a property put(ref), we need to adjust the first argument to have a
// named arg of DISPID_PROPERTYPUT.
if (wInvokeAction & (DISPATCH_PROPERTYPUT | DISPATCH_PROPERTYPUTREF))
{
m_iNamedArgCount = 1;
m_aDispIds[1] = DISPID_PROPERTYPUT;
pvargReturn = NULL;
}
dispparams.rgdispidNamedArgs = m_aDispIds + 1;
dispparams.rgvarg = m_aVargs;
dispparams.cArgs = m_iArgCount;
dispparams.cNamedArgs = m_iNamedArgCount;
excep.pfnDeferredFillIn = NULL;
hr = pdisp->Invoke(m_aDispIds[0], IID_NULL, LOCALE_SYSTEM_DEFAULT,
wInvokeAction, &dispparams, pvargReturn, &excep, &uiArgErr);
if (wFlags & DISP_FREEARGS)
ClearAllArgs();
if (FAILED(hr))
{
// display the exception information if appropriate:
if (!(wFlags & DISP_NOSHOWEXCEPTIONS))
ShowException(szMember, hr, &excep, uiArgErr);
// free exception structure information
SysFreeString(excep.bstrSource);
SysFreeString(excep.bstrDescription);
SysFreeString(excep.bstrHelpFile);
return FALSE;
}
return TRUE;
}
void CXLAutomation::AddArgumentCommon(LPOLESTR lpszArgName, WORD wFlags, VARTYPE vt)
{
ClearVariant(&m_aVargs[m_iArgCount]);
m_aVargs[m_iArgCount].vt = vt;
m_awFlags[m_iArgCount] = wFlags;
if (lpszArgName != NULL)
{
m_alpszArgNames[m_iNamedArgCount + 1] = lpszArgName;
m_iNamedArgCount++;
}
}
void AddArgumentCommon(LPOLESTR lpszArgName, WORD wFlags, VARTYPE vt)
{
ClearVariant(&g_aVargs[g_iArgCount]);
g_aVargs[g_iArgCount].vt = vt;
g_awFlags[g_iArgCount] = wFlags;
if (lpszArgName != NULL)
{
g_alpszArgNames[g_iNamedArgCount + 1] = lpszArgName;
g_iNamedArgCount++;
}
}
/*
* Constructs an 1-dimensional array containing variant strings. The strings
* are copied from an incoming array of C-Strings.
*/
BOOL CXLAutomation::AddArgumentCStringArray(LPOLESTR lpszArgName, WORD wFlags, LPOLESTR *paszStrings, int iCount)
{
SAFEARRAY *psa;
SAFEARRAYBOUND saBound;
VARIANTARG *pvargBase;
VARIANTARG *pvarg;
int i, j;
saBound.lLbound = 0;
saBound.cElements = iCount;
psa = SafeArrayCreate(VT_VARIANT, 1, &saBound);
if (psa == NULL)
return FALSE;
SafeArrayAccessData(psa, (void**) &pvargBase);
pvarg = pvargBase;
for (i = 0; i < iCount; i++)
{
// copy each string in the list of strings
ClearVariant(pvarg);
pvarg->vt = VT_BSTR;
if ((pvarg->bstrVal = SysAllocString(*paszStrings++)) == NULL)
{
// memory failure: back out and free strings alloc'ed up to
// now, and then the array itself.
pvarg = pvargBase;
for (j = 0; j < i; j++)
{
SysFreeString(pvarg->bstrVal);
pvarg++;
}
SafeArrayDestroy(psa);
return FALSE;
}
pvarg++;
}
SafeArrayUnaccessData(psa);
// With all memory allocated, setup this argument
AddArgumentCommon(lpszArgName, wFlags, VT_VARIANT | VT_ARRAY);
m_aVargs[m_iArgCount++].parray = psa;
return TRUE;
}
/*
* ClearAllArgs
*
* Clears the existing contents of the arg array in preparation for
* a new invocation. Frees argument memory if so marked.
*/
void CXLAutomation::ClearAllArgs()
{
int i;
for (i = 0; i < m_iArgCount; i++)
{
if (m_awFlags[i] & DISPARG_NOFREEVARIANT)
// free the variant's contents based on type
ClearVariant(&m_aVargs[i]);
else
ReleaseVariant(&m_aVargs[i]);
}
m_iArgCount = 0;
m_iNamedArgCount = 0;
}
void ClearAllArgs()
{
int i;
for (i = 0; i < g_iArgCount; i++)
{
if (g_awFlags[i] & DISPARG_NOFREEVARIANT)
// free the variant's contents based on type
ClearVariant(&g_aVargs[i]);
else
ReleaseVariant(&g_aVargs[i]);
}
g_iArgCount = 0;
g_iNamedArgCount = 0;
}
/*
* ReleaseVariant
*
* Clears a particular variant structure and releases any external objects
* or memory contained in the variant. Supports the data types listed above.
*/
int CXLAutomation::ReleaseVariant(VARIANTARG *pvarg)
{
VARTYPE vt;
VARIANTARG *pvargArray;
long lLBound, lUBound, l;
vt = pvarg->vt & 0xfff; // mask off flags
// check if an array. If so, free its contents, then the array itself.
if (V_ISARRAY(pvarg))
{
// variant arrays are all this routine currently knows about. Since a
// variant can contain anything (even other arrays), call ourselves
// recursively.
if (vt == VT_VARIANT)
{
SafeArrayGetLBound(pvarg->parray, 1, &lLBound);
SafeArrayGetUBound(pvarg->parray, 1, &lUBound);
if (lUBound > lLBound)
{
lUBound -= lLBound;
SafeArrayAccessData(pvarg->parray, (void**)&pvargArray);
for (l = 0; l < lUBound; l++)
{
ReleaseVariant(pvargArray);
pvargArray++;
}
SafeArrayUnaccessData(pvarg->parray);
}
}
else
{
return 1; // non-variant type
// MessageBox(NULL, _T("ReleaseVariant: Array contains non-variant type"), "Failed", MB_OK | MB_ICONSTOP);
}
// Free the array itself.
SafeArrayDestroy(pvarg->parray);
}
else
{
switch (vt)
{
case VT_DISPATCH:
//(*(pvarg->pdispVal->lpVtbl->Release))(pvarg->pdispVal);
pvarg->pdispVal->Release();
break;
case VT_BSTR:
SysFreeString(pvarg->bstrVal);
break;
case VT_I2:
case VT_BOOL:
case VT_R8:
case VT_ERROR: // to avoid erroring on an error return from Excel
// no work for these types
break;
default:
return 2; //unknonw type
// MessageBox(NULL, _T("ReleaseVariant: Unknown type"), "Failed", MB_OK | MB_ICONSTOP);
break;
}
}
ClearVariant(pvarg);
return 0;
}
void ReleaseVariant(VARIANTARG *pvarg)
{
VARTYPE vt;
VARIANTARG HUGEP *pvargArray;
long lLBound, lUBound, l;
vt = pvarg->vt & 0xfff; // mask off flags
// check if an array. If so, free its contents,
// then the array itself.
if (V_ISARRAY(pvarg))
{
// variant arrays are all this routine currently knows about.
// Since a variant can contain anything (even other arrays),
// call ourselves recursively.
if (vt == VT_VARIANT)
{
SafeArrayGetLBound(pvarg->parray, 1, &lLBound);
SafeArrayGetUBound(pvarg->parray, 1, &lUBound);
if (lUBound > lLBound)
{
lUBound -= lLBound;
SafeArrayAccessData(pvarg->parray,(void **) &pvargArray);
for (l = 0; l < lUBound; l++)
{
ReleaseVariant(pvargArray);
pvargArray++;
}
SafeArrayUnaccessData(pvarg->parray);
}
}
else
{
MessageBox(g_hwndApp, "ReleaseVariant: Array contains non-variant type", g_szAppTitle, MB_OK | MB_ICONSTOP);
}
// Free the array itself.
SafeArrayDestroy(pvarg->parray);
}
else
{
switch (vt)
{
case VT_DISPATCH:
//14/12/2004
//!!!all comments had to be added
(/***/(pvarg->pdispVal/*->lpVtbl*/->Release))(/*pvarg->pdispVal*/);
break;
case VT_BSTR:
SysFreeString(pvarg->bstrVal);
break;
case VT_I2:
case VT_BOOL:
case VT_R8:
case VT_ERROR: // to avoid erroring on an error return
// from Excel
// no work for these types
break;
default:
MessageBox(g_hwndApp, "ReleaseVariant: Unknown type",g_szAppTitle, MB_OK | MB_ICONSTOP);
break;
}
}
ClearVariant(pvarg);
}
