153 lines
3.3 KiB
C++
153 lines
3.3 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: utils.hxx
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//
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// Contents: Useful classes in implementing properties.
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//
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// Classes: CPropSetName - Buffer which converts fmtids->names
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// CSubPropertyName - Buffer which converts VT_STREAM etc -> name
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//
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// Functions: DfpStatusToHResult - map NTSTATUS to HRESULT
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// VerifyCommitFlags - check transaction flags
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// Probe - probe memory range to generate GP fault.
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//
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// History: 1-Mar-95 BillMo Created.
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//
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// Notes:
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//
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// Codework:
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//
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//--------------------------------------------------------------------------
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//+-------------------------------------------------------------------------
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//
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// Misc functions and defines
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//
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//--------------------------------------------------------------------------
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#if DBG
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#define STACKELEMS 3
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#else
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#define STACKELEMS 64
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#endif
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extern HRESULT NtStatusToScode(NTSTATUS);
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inline HRESULT DfpNtStatusToHResult(NTSTATUS nts)
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{
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if ((nts & 0xF0000000) == 0x80000000)
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return nts;
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else
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return(NtStatusToScode(nts));
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}
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#define VerifyCommitFlags(cf) \
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((((cf) & ~(STGC_OVERWRITE | STGC_ONLYIFCURRENT | \
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STGC_DANGEROUSLYCOMMITMERELYTODISKCACHE)) == 0) ? S_OK : \
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STG_E_INVALIDFLAG)
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inline VOID Probe(VOID *pv, ULONG cb)
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{
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BYTE b = *(BYTE*)pv;
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b=((BYTE*)pv)[cb-1];
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}
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//+-------------------------------------------------------------------------
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//
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// Class: CPropSetName
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//
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// Purpose: Wrap buffer to convert
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//
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// Interface:
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//
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//
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//
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//
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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class CPropSetName
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{
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public:
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CPropSetName(REFFMTID rfmtid);
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inline const OLECHAR * GetPropSetName()
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{
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return(_oszName);
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}
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private:
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OLECHAR _oszName[CWCSTORAGENAME];
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};
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class CStackBuffer
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{
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public:
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CStackBuffer(BYTE *pbStackBuf,
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ULONG ulElementSize,
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ULONG cStackElements);
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~CStackBuffer();
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HRESULT Init(ULONG cElements);
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protected:
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BYTE * _pbHeapBuf;
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private:
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BYTE * _pbStackBuf;
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ULONG _cbElementSize;
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ULONG _cStackElements;
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};
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inline CStackBuffer::CStackBuffer( BYTE *pbStackBuf,
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ULONG cbElementSize,
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ULONG cStackElements)
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: _pbStackBuf(pbStackBuf),
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_pbHeapBuf(pbStackBuf),
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_cbElementSize(cbElementSize),
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_cStackElements(cStackElements)
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{
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}
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inline CStackBuffer::~CStackBuffer()
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{
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if (_pbHeapBuf != _pbStackBuf)
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{
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delete [] _pbHeapBuf;
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}
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}
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class CStackPropIdArray : public CStackBuffer
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{
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public:
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inline CStackPropIdArray();
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inline PROPID * GetBuf();
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private:
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PROPID _apid[STACKELEMS];
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};
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inline CStackPropIdArray::CStackPropIdArray() :
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CStackBuffer((BYTE*)_apid, sizeof(_apid[0]), sizeof(_apid)/sizeof(_apid[0]))
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{
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}
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inline PROPID * CStackPropIdArray::GetBuf()
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{
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return((PROPID*)_pbHeapBuf);
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}
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inline void PropSysFreeString(BSTR bstr)
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{
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SysFreeString(bstr);
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}
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inline BSTR PropSysAllocString(LPOLECHAR pwsz)
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{
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return SysAllocString(pwsz);
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}
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