290 lines
8.1 KiB
C++
290 lines
8.1 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: wdfiter.cxx
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//
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// Contents: CWrappedDocFile iterator methods
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//
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// History: 22-Jan-92 DrewB Created
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//
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//---------------------------------------------------------------
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#include <dfhead.cxx>
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#pragma hdrstop
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//+---------------------------------------------------------------------------
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//
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// Member: CWrappedDocFile::FindGreaterEntry, public
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//
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// Synopsis: Returns the next greater child
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//
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// Arguments: [pdfnKey] - Previous key
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// [pib] - Fast iterator buffer
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// [pstat] - Full iterator buffer
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//
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// Returns: Appropriate status code
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//
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// Modifies: [pib] or [pstat]
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//
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// History: 16-Apr-93 DrewB Created
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//
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// Notes: Either [pib] or [pstat] must be NULL
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//
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//----------------------------------------------------------------------------
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#ifdef CODESEGMENTS
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#pragma code_seg(SEG_CWrappedDocFile_FindGreaterEntry) // Iterate_TEXT
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#endif
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SCODE CWrappedDocFile::FindGreaterEntry(CDfName const *pdfnKey,
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SIterBuffer *pib,
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STATSTGW *pstat)
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{
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SCODE sc;
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CDfName *pdfnGreater, *pdfn;
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CUpdate *pud, *pudGreater;
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BOOL fFilled = FALSE;
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WCHAR *pwcsName;
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olDebugOut((DEB_ITRACE, "In CWrappedDocFile::FindGreaterEntry:%p("
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"%p, %p, %p)\n", this, pdfnKey, pib, pstat));
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olAssert(pib == NULL || pstat == NULL);
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// Find the update entry that has the next greater name than the key
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pudGreater = NULL;
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for (pud = _ulChanged.GetHead(); pud; pud = pud->GetNext())
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{
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if (pud->IsCreate() || pud->IsRename())
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{
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pdfn = pud->GetCurrentName();
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if (_ulChanged.IsEntry(pdfn, NULL) == UIE_CURRENT &&
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CDirectory::NameCompare(pdfn, pdfnKey) > 0 &&
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(pudGreater == NULL ||
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CDirectory::NameCompare(pdfn,
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pudGreater->GetCurrentName()) < 0))
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{
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pudGreater = pud;
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pdfnGreater = pdfn;
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}
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}
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}
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// Request the next greater name from the base
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if (_pdfBase != NULL)
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{
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CDfName dfnKey;
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// Loop until we either get a valid name or we run out
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dfnKey.Set(pdfnKey);
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for (;;)
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{
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if (FAILED(sc = _pdfBase->FindGreaterEntry(&dfnKey, pib, pstat)))
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{
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if (sc != STG_E_NOMOREFILES)
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{
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olErr(EH_Err, sc);
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}
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else
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{
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break;
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}
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}
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if (pib)
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dfnKey.Set(&pib->dfnName);
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else
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{
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olAssert(pstat != NULL);
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dfnKey.CopyString(pstat->pwcsName);
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}
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// Filter this name against the update list
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pdfn = &dfnKey;
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if (_ulChanged.IsEntry(pdfn, NULL) == UIE_ORIGINAL)
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{
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if (pstat)
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TaskMemFree(pstat->pwcsName);
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continue;
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}
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// If this name is less than the update list name, use
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// the stat entry
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if (pudGreater == NULL ||
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CDirectory::NameCompare(pdfn,
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pudGreater->GetCurrentName()) < 0)
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{
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PTSetMember *ptsm;
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fFilled = TRUE;
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if (pstat && (ptsm = _ppubdf->FindXSMember(pdfn, GetName())))
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{
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pwcsName = pstat->pwcsName;
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// We want to keep the name already in pstat but pick
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// up any new times on the XSM
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olChkTo(EH_name, ptsm->Stat(pstat, STATFLAG_NONAME));
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pstat->pwcsName = pwcsName;
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}
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// No need to check for renames because Exists would
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// have failed if there was a rename
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}
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else if (pstat)
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{
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TaskMemFree(pstat->pwcsName);
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}
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// Found a valid name, so stop looping
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break;
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}
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}
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if (!fFilled)
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{
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if (pudGreater == NULL)
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{
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sc = STG_E_NOMOREFILES;
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}
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else
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{
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if (pstat)
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{
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if (pudGreater->IsCreate())
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{
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olChk(pudGreater->GetXSM()->Stat(pstat, 0));
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}
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else
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{
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olAssert(pudGreater->IsRename());
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olChk(StatEntry(pudGreater->GetCurrentName(), pib, pstat));
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}
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}
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else
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{
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olAssert(pib != NULL);
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pib->dfnName.Set(pudGreater->GetCurrentName());
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pib->type = pudGreater->GetFlags() & ULF_TYPEFLAGS;
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}
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sc = S_OK;
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}
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}
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olDebugOut((DEB_ITRACE, "Out CWrappedDocFile::FindGreaterEntry\n"));
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EH_Err:
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return sc;
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EH_name:
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if (pstat)
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TaskMemFree(pwcsName);
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return sc;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CWrappedDocFile::StatEntry, public
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//
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// Synopsis: Gets information for a child
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//
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// Arguments: [pdfn] - Child name
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// [pib] - Short information
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// [pstat] - Full information
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//
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// Returns: Appropriate status code
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//
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// Modifies: [pib] or [pstat]
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//
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// History: 16-Apr-93 DrewB Created
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//
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// Notes: Either [pib] or [pstat] must be NULL
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//
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//----------------------------------------------------------------------------
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#ifdef CODESEGMENTS
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#pragma code_seg(SEG_CWrappedDocFile_StatEntry)
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#endif
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SCODE CWrappedDocFile::StatEntry(CDfName const *pdfn,
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SIterBuffer *pib,
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STATSTGW *pstat)
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{
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CUpdate *pud;
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UlIsEntry uie;
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SCODE sc = S_FALSE;
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CDfName const *pdfnBase = pdfn;
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BOOL fResult = FALSE;
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olDebugOut((DEB_ITRACE, "In CWrappedDocFile::StatEntry:%p(%p, %p, %p)\n",
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this, pdfn, pib, pstat));
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olAssert((pib != NULL) != (pstat != NULL));
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// Attempt to find the name in the update list
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uie = _ulChanged.IsEntry(pdfn, &pud);
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if (uie == UIE_ORIGINAL)
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{
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// Name has been renamed or deleted
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sc = STG_E_FILENOTFOUND;
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fResult = TRUE;
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}
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else if (uie == UIE_CURRENT)
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{
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if (pib)
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{
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pib->dfnName.Set(pud->GetCurrentName());
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pib->type = pud->GetFlags() & ULF_TYPEFLAGS;
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fResult = TRUE;
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sc = S_OK;
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}
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else
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{
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olAssert(pstat != NULL);
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// Find whether the given name came from a create entry
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// or resolve the name to the base name
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pud = CUpdateList::FindBase(pud, &pdfnBase);
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if (pud != NULL)
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{
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// Stat creation update entry
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olChk(pud->GetXSM()->Stat(pstat, 0));
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fResult = TRUE;
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}
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// else the update entry is a rename of an object in the base
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// and FindBase changed pdfnBase to the base name
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}
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}
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olAssert(fResult || sc == S_FALSE);
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if (!fResult)
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{
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// Haven't found the entry so try the base
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if (_pdfBase)
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{
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olChk(_pdfBase->StatEntry(pdfnBase, pib, pstat));
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// Check to see if we need to return a renamed name
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if (!pdfn->IsEqual(pdfnBase))
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{
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if (pib)
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pib->dfnName.Set(pdfn);
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else
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{
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TaskMemFree(pstat->pwcsName);
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olMem(pstat->pwcsName =
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(WCHAR *)TaskMemAlloc(pdfn->GetLength()));
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memcpy(pstat->pwcsName, pdfn->GetBuffer(),
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pdfn->GetLength());
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}
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}
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}
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else
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sc = STG_E_FILENOTFOUND;
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}
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olDebugOut((DEB_ITRACE, "Out CWrappedDocFile::StatEntry\n"));
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EH_Err:
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return sc;
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}
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