自学教程：C++ ERROR3IF函数代码示例

BOOL NodeAnimatingBitmap::AllocBitmapRefs(INT32 nCount){	ERROR3IF(m_pBmpRefs != 0, "Bitmaps already allocated in NodeAnimatingBitmap::AllocBitmapRefs");	ERROR3IF(nCount <= 0, "Invalid count in NodeAnimatingBitmap::AllocBitmapRefs");	m_pBmpRefs = new KernelBitmapRef[nCount];	return m_pBmpRefs != 0;}

ActionCode LayerColourAction::Init(	UndoableOperation* pOp,									ActionList* pActionList,									OpChangeLayerColourParam EntryParam){	UINT32 ActSize = sizeof(LayerColourAction);	LayerColourAction* pNewAction;	ActionCode Ac = Action::Init(pOp,pActionList,ActSize,CC_RUNTIME_CLASS(LayerColourAction),(Action**)&pNewAction);	if (Ac != AC_FAIL && pNewAction != NULL)	{		OpChangeLayerColourParam& Param = ((LayerColourAction*)pNewAction)->Param;		Document* pDoc 	 = EntryParam.pDoc;		Layer*    pLayer = EntryParam.pLayer;		Param.pDoc 	 = pDoc;		Param.pLayer = pLayer;		if (pDoc != NULL && pLayer != NULL)		{			DocColour* pDocColour = pLayer->GetGuideColour();			Param.pColour = pDocColour->FindParentIndexedColour();			pLayer->SetGuideColour(EntryParam.pColour);			LayerSGallery::ForceRedrawLayer(pDoc,pLayer);			BROADCAST_TO_ALL(LayerMsg(pLayer,LayerMsg::GUIDELINES_CHANGED));		}		ERROR3IF(pDoc == NULL,  "pDoc is NULL");					ERROR3IF(pLayer == NULL,"pLayer is NULL");				}	return Ac;}

void ColourPlate::GetDescription(StringBase *Description){	ERROR3IF(Description == NULL, "Illegal NULL param");	*Description = TEXT("");	switch(GetType())	{		case COLOURPLATE_CYAN:			Description->MakeMsg(_R(IDS_COLOURPLATE_CYAN));			break;		case COLOURPLATE_MAGENTA:			Description->MakeMsg(_R(IDS_COLOURPLATE_MAGENTA));			break;		case COLOURPLATE_YELLOW:			Description->MakeMsg(_R(IDS_COLOURPLATE_YELLOW));			break;		case COLOURPLATE_KEY:			Description->MakeMsg(_R(IDS_COLOURPLATE_BLACK));			break;		case COLOURPLATE_SPOT:			{				IndexedColour *Col = GetSpotColour();				ERROR3IF(Col == NULL, "NULL Spot colour in spot plate");				Description->MakeMsg(_R(IDS_COLOURPLATE_SPOT), (TCHAR *) *(Col->GetName()) );			}			break;		default:			break;	}}

void PrintPrefsDlg::SetCurrentDlg(PrintPrefsDlg* pDlg){	ERROR3IF(pDlg != NULL && pCurrentDlg != NULL,"Setting current Dlg, but there's already one there");	ERROR3IF(pDlg == NULL && pCurrentDlg == NULL,"Setting current Dlg to NULL, but there's no current dlg");	pCurrentDlg = pDlg;}

void OpNudge::PerformMergeProcessing(){    // Obtain a pointer to the operation history for the current document    OperationHistory* pOpHist = &pOurDoc->GetOpHistory();    // Ensure that we are the last operation added to the operation history    // Note cannot be an ERROR2 cos this function cannot fail.    ERROR3IF(pOpHist->FindLastOp() != this, "Last Op should be this op");    // OK lets see if the operation performed before this was an OpNudge operation    Operation* pPrevOp = pOpHist->FindPrevToLastOp();    if (pPrevOp != NULL)   // Check if there was a previous op    {        if (IS_A(pPrevOp, OpNudge))        {            // Yes it was            // We can merge this op with pPrevOp if they both apply to the same set of objects            // This will be TRUE is their SelectionStates are the same.            RestoreSelectionsAction* pRestoreSelAct = (RestoreSelectionsAction*)                    GetUndoActionList()->FindActionOfClass(CC_RUNTIME_CLASS(RestoreSelectionsAction));            ERROR3IF(pRestoreSelAct == NULL, "This op should have a RestoreSelectionsAction");            SelectionState* ThisOpsSelection = pRestoreSelAct->GetSelState();            pRestoreSelAct = (RestoreSelectionsAction*)                             pPrevOp->GetUndoActionList()->FindActionOfClass(CC_RUNTIME_CLASS(RestoreSelectionsAction));            ERROR3IF(pRestoreSelAct == NULL, "OpNudge op should have a RestoreSelectionsAction");            SelectionState* LastOpsSelection = pRestoreSelAct->GetSelState();            if ((*ThisOpsSelection) == (*LastOpsSelection))            {                // scan to see if either of these ops hides a node                // if either do then we cannot merge them together                // this can happen if perhaps the extending definitions                // were changed by the nudge (sjk 27-7-00)                if (DoesActionListHideNodes(pPrevOp) || DoesActionListHideNodes(this) )                    return;                // this op can be merged into the previous op, we simply need to combine the                // TransformNodeActions                TransformNodeAction* pTransNdAct = (TransformNodeAction*)                                                   GetUndoActionList()->FindActionOfClass(CC_RUNTIME_CLASS(TransformNodeAction));                ERROR3IF(pTransNdAct == NULL, "This op should have a TransformNodeAction");                TransformNodeAction* pLastOpsTransNdAct = (TransformNodeAction*)                        pPrevOp->GetUndoActionList()->FindActionOfClass(CC_RUNTIME_CLASS(TransformNodeAction));                ERROR3IF(pLastOpsTransNdAct == NULL,"OpNudgeOp should have a TransformNodeAction");                pLastOpsTransNdAct->CombineWith(pTransNdAct);                // This op is no longer required, so let's vape it                pOpHist->DeleteLastOp();            }        }    }    return;}

void String_32::CopyConstruct( const StringBase &other ){	*(text = fixedbuf) = 0;	length = FIX_LEN_BUFSIZE;	ERROR3IF((const TCHAR*) other == 0, "StringBase to be copied has not been ALLOCated");	ERROR3IF(camStrlen((const TCHAR*) other) >= length,				"Constructed String_32 not large enough to hold StringBase copy");	camStrcpy(text, (const TCHAR*) other);}

BOOL BfxPixelOp::SetAuxilliaryBitmaps(KernelBitmap * pProposed /*A*/, KernelBitmap * pCurrent /*B*/,							  KernelBitmap * pOriginal /*T*/, INT32 Threshold, DWORD theColour){	if (pProposed)	{		ERROR2IF( (pProposed->ActualBitmap==NULL) ,FALSE,"BfxPixelOp can't find OIL bitmap");		ERROR3IF( (!(pProposed->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxPixelOp Oil layer inconsistency");				BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pProposed->ActualBitmap))->BMInfo->bmiHeader);				ERROR2IF( ((pBMI->biHeight != Height) || (pBMI->biWidth != Width) || (BPP && pBMI->biBitCount !=BPP)), FALSE,			  "Incompatible bitmaps for BfxPixelOp::SetAuxilliaryBitmap");		pA = (DWORD *)(void *)(((CWxBitmap *)(pProposed->ActualBitmap))->BMBytes);	}	else	{		pA = NULL;	}	if (pOriginal)	{		ERROR2IF( (pOriginal->ActualBitmap==NULL) ,FALSE,"BfxPixelOp can't find OIL bitmap");		ERROR3IF( (!(pOriginal->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxPixelOp Oil layer inconsistency");				BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pOriginal->ActualBitmap))->BMInfo->bmiHeader);				ERROR2IF( ((pBMI->biHeight != Height) || (pBMI->biWidth != Width) || (BPP && pBMI->biBitCount !=BPP)), FALSE,			  "Incompatible bitmaps for BfxPixelOp::SetAuxilliaryBitmap");		pT = (DWORD *)(void *)(((CWxBitmap *)(pOriginal->ActualBitmap))->BMBytes);	}	else	{		pT = NULL;	}	if (pCurrent)	{		ERROR2IF( (pCurrent->ActualBitmap==NULL) ,FALSE,"BfxPixelOp can't find OIL bitmap");		ERROR3IF( (!(pCurrent->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxPixelOp Oil layer inconsistency");				BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pCurrent->ActualBitmap))->BMInfo->bmiHeader);				ERROR2IF( ((pBMI->biHeight != Height) || (pBMI->biWidth != Width) || (BPP && pBMI->biBitCount !=BPP)), FALSE,			  "Incompatible bitmaps for BfxPixelOp::SetAuxilliaryBitmap");		pB = (DWORD *)(void *)(((CWxBitmap *)(pCurrent->ActualBitmap))->BMBytes);	}	else	{		pB = NULL;	}		Value = Threshold;	Colour = theColour;	return TRUE;}

void BitmapExportPaletteInterface::SetFlags(INT32 index, INT32 flags){	if (!m_SortedPaletteValid) ValidateSortedPalette();	ERROR3IF(index == -1, "Function called with an invalid palette index");	ExtendedPalette	*palette = BmapPrevDlg::m_pExportOptions->GetExtendedPalette();	ERROR3IF(!palette, "There is no palette - This should never happen");	palette->Data[m_PaletteSortedToReal[index]].Flags = flags;}

/******************************************************************************************>	INT32 BitmapExportPaletteInterface::HueComparisonFn(const INT32 *arg1, const INT32 *arg2)	Author:		Jonathan_Payne (Xara Group Ltd) <[email
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