383 lines
10 KiB
C++
383 lines
10 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 - 1992.
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//
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// File: exppsi.cxx
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//
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// Contents: CExposedPropSetIter implementation
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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#include <exphead.cxx>
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#pragma hdrstop
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#include <exppsi.hxx>
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::CExposedPropSetIter, public
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//
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// Synopsis: Constructor
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//
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// Arguments: [ppdf] - Public docfile
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// [pdfnKey] - Initial key
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// [pdfb] - DocFile basis
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// [ppc] - Context
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// [fOwnContext] - Whether this object owns the context
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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CExposedPropSetIter::CExposedPropSetIter(CPubDocFile *ppdf,
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CDfName *pdfnKey,
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CDFBasis *pdfb,
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CPerContext *ppc,
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BOOL fOwnContext)
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{
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olDebugOut((DEB_ITRACE, "In CExposedPropSetIter::CExposedPropSetIter("
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"%p, %d:%s, %p, %p, %u)\n", ppdf, pdfnKey->GetLength(),
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pdfnKey->GetBuffer(), pdfb, ppc, fOwnContext));
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_ppc = ppc;
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_fOwnContext = fOwnContext;
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_ppdf = P_TO_BP(CBasedPubDocFilePtr, ppdf);
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_ppdf->vAddRef();
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_dfnKey.Set(pdfnKey);
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_pdfb = P_TO_BP(CBasedDFBasisPtr, pdfb);
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_pdfb->vAddRef();
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_cReferences = 1;
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_sig = CEXPOSEDPROPSETITER_SIG;
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olDebugOut((DEB_ITRACE,
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"Out CExposedPropSetIter::CExposedPropSetIter\n"));
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::~CExposedPropSetIter, public
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//
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// Synopsis: Destructor
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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CExposedPropSetIter::~CExposedPropSetIter(void)
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{
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olDebugOut((DEB_ITRACE,
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"In CExposedPropSetIter::~CExposedPropSetIter\n"));
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_sig = CEXPOSEDPROPSETITER_SIGDEL;
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olAssert(_cReferences == 0);
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if (_ppdf)
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_ppdf->CPubDocFile::vRelease();
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if (_pdfb)
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_pdfb->CDFBasis::vRelease();
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if (_fOwnContext && _ppc)
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_ppc->Release();
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olDebugOut((DEB_ITRACE,
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"Out CExposedPropSetIter::~CExposedPropSetIter\n"));
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::Next, public
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//
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// Synopsis: Gets N entries from an iterator
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//
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// Arguments: [celt] - Count of elements
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// [rgelt] - Array for element return
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// [pceltFetched] - If non-NULL, contains the number of
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// elements fetched
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//
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// Returns: Appropriate status code
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//
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// Modifies: [rgelt]
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// [pceltFetched]
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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_OLESTDMETHODIMP CExposedPropSetIter::Next(ULONG celt,
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STATPROPSETSTG FAR *rgelt,
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ULONG *pceltFetched)
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{
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SCODE scSem = STG_E_INUSE;
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SCODE sc;
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STATSTGW sstg;
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STATPROPSETSTG *pelt = rgelt;
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ULONG celtDone;
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WCHAR *pwc;
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CDfName dfnInitial;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::Next(%lu, %p, %p)\n",
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celt, rgelt, pceltFetched));
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if (pceltFetched)
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{
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olChkTo(EH_RetSc, ValidateOutBuffer(pceltFetched, sizeof(ULONG)));
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*pceltFetched = 0;
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}
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else if (celt > 1)
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olErr(EH_Err, STG_E_INVALIDPARAMETER);
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olAssert(0xffffUL/sizeof(STATPROPSTG) >= celt);
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olChkTo(EH_RetSc,
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ValidateOutBuffer(rgelt, (size_t)(sizeof(STATPROPSTG)*celt)));
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memset(rgelt, 0, (size_t)(sizeof(STATPROPSTG)*celt));
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olChk(Validate());
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olChk(_ppdf->CheckReverted());
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olChk(scSem = TakeSem());
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SetReadAccess();
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dfnInitial.Set(&_dfnKey);
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TRY
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{
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for (; pelt<rgelt+celt; pelt++)
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{
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sc = _ppdf->FindGreaterEntry(&_dfnKey, NULL, &sstg, TRUE);
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if (FAILED(sc))
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{
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if (sc == STG_E_NOMOREFILES)
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sc = S_FALSE;
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break;
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}
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_dfnKey.CopyString(sstg.pwcsName);
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pwc = (WCHAR *)_dfnKey.GetBuffer();
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TaskMemFree(sstg.pwcsName);
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// We need to copy the STATSTG fields into our
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// STATPROPSETSTG
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if (pwc[0] == PROPBYTE_WCHAR &&
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pwc[1] == PROPSET_WCHAR)
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{
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memcpy(&pelt->iid, pwc+2, sizeof(IID));
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pelt->mtime = sstg.mtime;
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pelt->atime = sstg.atime;
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pelt->ctime = sstg.ctime;
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}
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else
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{
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// Not a property set name, ignore
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pelt--;
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}
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}
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}
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CATCH(CException, e)
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{
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sc = e.GetErrorCode();
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}
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END_CATCH
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::Next => %lX\n", sc));
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EH_Err:
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ClearReadAccess();
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ReleaseSem(scSem);
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celtDone = pelt-rgelt;
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if (FAILED(sc))
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#ifndef WIN32
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memset(rgelt, 0, (size_t)(sizeof(STATPROPSTG)*celt));
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#else
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NULL;
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#endif
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else if (pceltFetched)
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*pceltFetched = celtDone;
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EH_RetSc:
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return sc;
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::Skip, public
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//
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// Synopsis: Skips N entries from an iterator
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//
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// Arguments: [celt] - Count of elements
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//
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// Returns: Appropriate status code
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP CExposedPropSetIter::Skip(ULONG celt)
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{
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SCODE sc;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::Skip(%lu)\n", celt));
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if (SUCCEEDED(Validate()))
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sc = hSkip(celt, TRUE);
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::Skip\n"));
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return ResultFromScode(sc);
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::Reset, public
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//
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// Synopsis: Rewinds the iterator
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//
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// Returns: Appropriate status code
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP CExposedPropSetIter::Reset(void)
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{
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SCODE sc;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::Reset()\n"));
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if (SUCCEEDED(Validate()))
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sc = hReset();
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::Reset\n"));
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return ResultFromScode(sc);
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::Clone, public
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//
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// Synopsis: Clones this iterator
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//
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// Arguments: [ppenm] - Clone return
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//
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// Returns: Appropriate status code
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//
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// Modifies: [ppenm]
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP CExposedPropSetIter::Clone(IEnumSTATPROPSETSTG **ppenm)
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{
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SCODE sc, scSem = STG_E_INUSE;
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SafeCExposedPropSetIter pepi;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::Clone(%p)\n", ppenm));
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olChk(ValidateOutPtrBuffer(ppenm));
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*ppenm = NULL;
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olChk(Validate());
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olChk(_ppdf->CheckReverted());
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olChk(scSem = TakeSem());
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SetReadAccess();
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pepi.Attach(new CExposedPropSetIter(BP_TO_P(CPubDocFile *, _ppdf),
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&_dfnKey, BP_TO_P(CDFBasis *, _pdfb),
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_ppc,
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TRUE));
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if ((CExposedPropSetIter *)pepi == NULL)
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sc = STG_E_INSUFFICIENTMEMORY;
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ClearReadAccess();
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ReleaseSem(scSem);
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if (SUCCEEDED(sc))
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{
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TRANSFER_INTERFACE(pepi, IEnumSTATPROPSETSTG, ppenm);
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_ppc->AddRef();
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}
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::Clone => %p\n",
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*ppenm));
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// Fall through
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EH_Err:
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return ResultFromScode(sc);
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::Release, public
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//
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// Synopsis: Releases resources for the iterator
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//
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// Returns: Appropriate status code
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP_(ULONG) CExposedPropSetIter::Release(void)
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{
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LONG lRet;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::Release()\n"));
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if (FAILED(Validate()))
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return 0;
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if ((lRet = hRelease()) == 0)
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delete this;
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::Release\n"));
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return lRet;
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::AddRef, public
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//
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// Synopsis: Increments the ref count
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//
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// Returns: Appropriate status code
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP_(ULONG) CExposedPropSetIter::AddRef(void)
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{
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ULONG ulRet;
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olDebugOut((DEB_TRACE, "In CExposedPropSetIter::AddRef()\n"));
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if (FAILED(Validate()))
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return 0;
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ulRet = hAddRef();
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::AddRef\n"));
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return ulRet;
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}
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//+--------------------------------------------------------------
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//
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// Member: CExposedPropSetIter::QueryInterface, public
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//
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// Synopsis: Returns an object for the requested interface
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//
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// Arguments: [iid] - Interface ID
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// [ppvObj] - Object return
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//
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// Returns: Appropriate status code
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//
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// Modifies: [ppvObj]
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//
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// History: 21-Dec-92 DrewB Created
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//
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//---------------------------------------------------------------
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STDMETHODIMP CExposedPropSetIter::QueryInterface(REFIID iid, void **ppvObj)
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{
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SCODE sc;
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olDebugOut((DEB_TRACE,
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"In CExposedPropSetIter::QueryInterface(riid, %p)\n",
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ppvObj));
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if (SUCCEEDED(Validate()))
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sc = hQueryInterface(iid, IID_IEnumSTATPROPSETSTG, this, ppvObj);
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olDebugOut((DEB_TRACE, "Out CExposedPropSetIter::QueryInterface => %p\n",
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ppvObj));
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return ResultFromScode(sc);
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}
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