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309 lines
7.1 KiB
309 lines
7.1 KiB
/*
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* _UTIL.H
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*
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* Purpose:
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* declarations for various useful utility functions
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*
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* Author:
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* alexgo (4/25/95)
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*/
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#ifndef __UTIL_H__
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#define __UTIL_H__
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HGLOBAL DuplicateHGlobal( HGLOBAL hglobal );
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INT CountMatchingBits(const DWORD *a, const DWORD *b, INT total);
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HRESULT ObjectReadSiteFlags(REOBJECT * preobj);
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//Default values for drag scrolling
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//(that aren't already defined by windows).
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#define DEFSCROLLMAXVEL 100 //Cursor velocity above which we will not
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//drag scroll (units=.01 in/sec).
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#define DEFSCROLLVAMOUNT 50 //Vert. scroll amount per interval (units=.01 in)
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#define DEFSCROLLHAMOUNT 50 //Horz. scroll amount per interval (units=.01 in)
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//Stuff from OLESTD samples
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//Ole clipboard format defines.
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#define CF_EMBEDSOURCE "Embed Source"
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#define CF_EMBEDDEDOBJECT "Embedded Object"
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#define CF_LINKSOURCE "Link Source"
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#define CF_OBJECTDESCRIPTOR "Object Descriptor"
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#define CF_FILENAME "FileName"
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#define CF_OWNERLINK "OwnerLink"
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HRESULT OleStdSwitchDisplayAspect(
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LPOLEOBJECT lpOleObj,
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LPDWORD lpdwCurAspect,
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DWORD dwNewAspect,
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HGLOBAL hMetaPict,
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BOOL fDeleteOldAspect,
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BOOL fSetupViewAdvise,
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LPADVISESINK lpAdviseSink,
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BOOL FAR * lpfMustUpdate);
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LPUNKNOWN OleStdQueryInterface(
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LPUNKNOWN lpUnk,
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REFIID riid);
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void OleUIDrawShading(LPRECT lpRect, HDC hdc);
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VOID OleSaveSiteFlags(LPSTORAGE pstg, DWORD dwFlags, DWORD dwUser, DWORD dvAspect);
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INT AppendString( BYTE **, BYTE *, int *, int * );
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/****************************************************************************/
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/* Stabilization classes */
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/* These are used to stabilize objects during re-entrant calls */
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/****************************************************************************/
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//+-------------------------------------------------------------------------
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//
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// Class: CSafeRefCount
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//
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// Purpose: A concrete class for objects like the default handler to
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// inherit from. CSafeRefCount will keep track of reference
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// counts, nesting counts, and zombie states, allowing objects
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// to easily manage the liveness of their memory images.
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//
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// Interface:
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//
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// History: dd-mmm-yy Author Comment
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// 01-Aug-94 alexgo author
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//
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//--------------------------------------------------------------------------
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class CSafeRefCount
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{
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public:
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ULONG SafeAddRef();
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ULONG SafeRelease();
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ULONG IncrementNestCount();
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ULONG DecrementNestCount();
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BOOL IsZombie();
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CSafeRefCount();
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virtual ~CSafeRefCount();
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protected:
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VOID Zombie();
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private:
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ULONG m_cRefs;
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ULONG m_cNest;
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ULONG m_fInDelete :1;
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ULONG m_fForceZombie :1;
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};
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//+-------------------------------------------------------------------------
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//
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// Class: CStabilize
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//
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// Purpose: An instance of this class should be allocated on the
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// stack of every object method that makes an outgoing call.
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// The contstructor takes a pointer to the object's base
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// CSafeRefCount class.
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//
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// Interface:
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//
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// History: dd-mmm-yy Author Comment
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// 01-Aug-94 alexgo author
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//
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// Notes: The constructor will increment the nest count of the
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// object while the destructor will decrement it.
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//
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//--------------------------------------------------------------------------
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class CStabilize
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{
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public:
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inline CStabilize( CSafeRefCount *pObjSafeRefCount );
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inline ~CStabilize();
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private:
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CSafeRefCount * m_pObjSafeRefCount;
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};
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inline CStabilize::CStabilize( CSafeRefCount *pObjSafeRefCount )
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{
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pObjSafeRefCount->IncrementNestCount();
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m_pObjSafeRefCount = pObjSafeRefCount;
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}
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inline CStabilize::~CStabilize()
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{
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m_pObjSafeRefCount->DecrementNestCount();
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}
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/*
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* SafeReleaseAndNULL(IUnknown **ppUnk)
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*
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* Purpose:
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* Helper for getting stable pointers during destruction or other times
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*
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* Notes:
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* Not thread safe, must provide higher level synchronization.
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*/
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inline void SafeReleaseAndNULL(IUnknown **ppUnk)
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{
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if (*ppUnk != NULL)
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{
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IUnknown *pUnkSave = *ppUnk;
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*ppUnk = NULL;
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pUnkSave->Release();
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}
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}
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BOOL FIsIconMetafilePict(HGLOBAL hmfp);
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HANDLE OleStdGetMetafilePictFromOleObject(
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LPOLEOBJECT lpOleObj,
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DWORD dwDrawAspect,
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LPSIZEL lpSizelHim,
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DVTARGETDEVICE FAR* ptd);
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HGLOBAL OleGetObjectDescriptorDataFromOleObject(
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LPOLEOBJECT pObj,
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DWORD dwAspect,
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POINTL ptl,
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LPSIZEL pszl);
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// Default size for stack buffer
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#define MAX_STACK_BUF 256
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/*
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* CTempBuf
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*
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* @class A simple temporary buffer allocator class that will allocate
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* buffers on the stack up to MAX_STACK_BUF and then use the
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* heap thereafter.
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*/
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class CTempBuf
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{
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//@access Public Data
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public:
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//@cmember Constructor
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CTempBuf();
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//@cmember Destructor
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~CTempBuf();
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//@cmember Get buffer of size cb
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void * GetBuf(LONG cb);
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//@access Private Data
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private:
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//@cmember Sets up initial state of object
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void Init();
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//@cmember Frees any buffers allocated from heap
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void FreeBuf();
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//@cmember Buffer on stack to use
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char _chBuf[MAX_STACK_BUF];
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//@cmember Pointer to buffer to use
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void * _pv;
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//@cmember Size of currently allocated buffer
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LONG _cb;
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};
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/*
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* CTempBuf::CTempBuf
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*
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* @mfunc Initialize object
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*
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*/
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inline CTempBuf::CTempBuf()
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{
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Init();
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}
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/*
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* CTempBuf::~CTempBuf
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*
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* @mfunc Free any resources attached to this object
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*
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*/
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inline CTempBuf::~CTempBuf()
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{
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FreeBuf();
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}
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/*
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* CTempCharBuf
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*
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* @class A wrapper for the temporary buffer allocater that returns a buffer of
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* char's.
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*
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* @base private | CTempBuf
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*/
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class CTempWcharBuf : private CTempBuf
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{
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//@access Public Data
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public:
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//@cmember Get buffer of size cch wide characters
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WCHAR * GetBuf(LONG cch);
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};
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/*
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* CTempBuf::GetBuf
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*
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* @mfunc Get a buffer of the requested size
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*
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* @rdesc Pointer to buffer or NULL if one could not be allocated
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*
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*/
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inline WCHAR *CTempWcharBuf::GetBuf(
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LONG cch) //@parm size of buffer needed in *characters*
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{
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return (WCHAR *) CTempBuf::GetBuf(cch * sizeof(WCHAR));
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}
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/*
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* CTempCharBuf
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*
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* @class A wrapper for the temporary buffer allocater that returns a buffer of
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* char's.
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*
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* @base private | CTempBuf
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*/
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class CTempCharBuf : private CTempBuf
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{
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//@access Public Data
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public:
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//@cmember Get buffer of size cch characters
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char * GetBuf(LONG cch);
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};
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/*
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* CTempBuf::GetBuf
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*
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* @mfunc Get a buffer of the requested size
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*
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* @rdesc Pointer to buffer or NULL if one could not be allocated
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*
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*/
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inline char *CTempCharBuf::GetBuf(LONG cch)
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{
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return (char *) CTempBuf::GetBuf(cch * sizeof(TCHAR));
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}
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// Author revision color table
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extern const COLORREF rgcrRevisions[];
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// Only fixed number of revision color so don't let the table overflow.
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#define REVMASK 7
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#endif // !__UTIL_H__
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