自学教程：C++ ERROR2IF函数代码示例

BOOL BfxPixelOp::SetBitmap(KernelBitmap * pKB, DWORD theCacheStateMask, DWORD theCacheValueMask,								  BOOL theDefaultValue){	Base = NULL;	ERROR2IF( ((!pKB) || (pKB->ActualBitmap==NULL)) ,FALSE,"BfxALU can't find OIL bitmap");	ERROR3IF( (!(pKB->ActualBitmap->IsKindOf(CC_RUNTIME_CLASS(CWxBitmap)) )),"BfxALU Oil layer inconsistency");	BITMAPINFOHEADER * pBMI=&(((CWxBitmap *)(pKB->ActualBitmap))->BMInfo->bmiHeader);	ERROR2IF( (BPP && pBMI->biBitCount != BPP), FALSE, "BfxPixelOp called with incorrect BPP");	Base = (DWORD *)(void *)(((CWxBitmap *)(pKB->ActualBitmap))->BMBytes);	Width = pBMI->biWidth;	INT32 Bits = pBMI->biBitCount;	switch (Bits)	{		case 1 : WidthRounded = (Width+31) &~31; break;		case 2 : WidthRounded = (Width+15) &~15; break;		case 4 : WidthRounded = (Width+7) &~7; break;		case 8 : WidthRounded = (Width+3) &~3; break;		case 16: WidthRounded = (Width+1) &~1; break;		case 32:		default:				 WidthRounded = Width; break;	} 	Height = pBMI->biHeight;	Size = (pBMI->biSizeImage)>>2;	return TRUE;}

BOOL PointersTab::CommitSection(){TRACEUSER( "Neville", _T("commit PointersTab section/n"));	ERROR2IF(pPrefsDlg == NULL,FALSE,"PointersTab::CommitSection called with no dialog pointer");	BOOL ok = pPrefsDlg->TalkToPage(_R(IDD_OPTSTAB_POINTERS));	// The pointers page identifier	if (!ok)		return TRUE;	// Talk to page failed to return now	// Section = Pointers	// Ok has been pressed so take the values from this section of the dialog box	BOOL Valid=FALSE;		// Flag for validity of value//	BOOL State=FALSE;		// Flag for state of button/switch	BOOL SetOk=TRUE;		// Preference value set ok	// Middle button removed for now as nothing seems to use it.	// 0, 1 or 2 indicating Left Middle or Right mouse button	ButtonFunction LeftButton = (ButtonFunction)pPrefsDlg->GetSelectedValueIndex(_R(IDC_OPTS_LEFTBUTTON));//	ButtonFunction MiddleButton = (ButtonFunction)pPrefsDlg->GetSelectedValueIndex(_R(IDC_OPTS_MIDDLEBUTTON));	ButtonFunction RightButton = (ButtonFunction)pPrefsDlg->GetSelectedValueIndex(_R(IDC_OPTS_RIGHTBUTTON));	ClickModifiers::SetButtonFunc(0, LeftButton);//	ClickModifiers::SetButtonFunc(1, MiddleButton);	ClickModifiers::SetButtonFunc(2, RightButton);	// All units work off the selected document and so we must do nothing if there is no	// selected document. Check our clas variable to see if this is true or not.	// Units should have been set up by the caller.	if (pDocument == NULL || pSpread == NULL)		return (TRUE);	// Now the magnetic radii	INT32 LineRadius = 0;						INT32 PointRadius = 0;						LineRadius = pPrefsDlg->GetUnitGadgetValue(_R(IDC_OPTS_LINERADIUS), CurrentPageUnits,											 0, INT_MAX, _R(IDE_OPTS_INVALIDLINERAD), &Valid);TRACEUSER( "Neville", _T("commit LineRadius distance='%d' Valid ='%d'/n"),LineRadius, Valid);	if (Valid)	{		SetOk = Camelot.SetPrefValue(TEXT("Magnetic Options"), TEXT("Line Radius"), &LineRadius);		ERROR2IF(!SetOk,2,_R(IDE_OPTS_SETPREF_EDIT));	}	else		return FALSE; 			// Magnetic line radius incorrect, user has been warned already	PointRadius = pPrefsDlg->GetUnitGadgetValue(_R(IDC_OPTS_POINTRADIUS), CurrentPageUnits,											 0, INT_MAX, _R(IDE_OPTS_INVALIDPOINTRAD), &Valid);TRACEUSER( "Neville", _T("commit PointRadius distance='%d' Valid ='%d'/n"),PointRadius, Valid);	if (Valid)	{		SetOk = Camelot.SetPrefValue(TEXT("Magnetic Options"), TEXT("Point Radius"), &PointRadius);		ERROR2IF(!SetOk,2,_R(IDE_OPTS_SETPREF_EDIT));	}	else		return FALSE; 			// Magnetic point radius incorrect, user has been warned already	return TRUE;}

/********************************************************************************************>	BOOL EllipseTool::Init()	Author:		Peter_Arnold (Xara Group Ltd) <[email
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