165 lines
4.0 KiB
C++
165 lines
4.0 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: nmidmap.cxx
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//
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// Contents: CNameIdMap implementation
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//
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// History: 11-May-93 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 "nmidmap.hxx"
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//+---------------------------------------------------------------------------
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//
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// Member: CNameIdMap::~CNameIdMap, public
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//
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// Synopsis: Destroys map
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//
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// History: 11-May-93 DrewB Created
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//
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//----------------------------------------------------------------------------
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CNameIdMap::~CNameIdMap(void)
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{
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while (_pniHead)
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{
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SNameId *pni = _pniHead->pniNext;
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DfMemFree(_pniHead->lpwstr);
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DfMemFree(_pniHead);
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_pniHead = pni;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CNameIdMap::Add, public
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//
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// Synopsis: Adds a mapping
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//
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// Arguments: [lpwstr] - Name
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// [id] - Id
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//
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// Returns: Pointer to mapping or NULL for failure
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//
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// History: 11-May-93 DrewB Created
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//
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//----------------------------------------------------------------------------
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SNameId *CNameIdMap::Add(LPWSTR lpwstr, PROPID id)
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{
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SNameId *pni;
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pni = (SNameId *)DfMemAlloc(sizeof(SNameId));
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if (pni == NULL)
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return NULL;
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pni->lpwstr = (WCHAR *)DfMemAlloc((wcslen(lpwstr)+1)*sizeof(WCHAR));
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if (pni->lpwstr == NULL)
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{
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DfMemFree(pni);
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return NULL;
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}
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wcscpy(pni->lpwstr, lpwstr);
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pni->id = id;
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pni->pniNext = _pniHead;
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_pniHead = pni;
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return pni;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CNameIdMap::RemoveByName, public
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//
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// Synopsis: Removes an entry found by name
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//
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// Arguments: [lpwstr] - Name
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//
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// History: 12-Jul-93 DrewB Created
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//
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// Notes: Entry doesn't have to exist
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//
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//----------------------------------------------------------------------------
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#ifdef REMOVE_NEEDED
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void CNameIdMap::RemoveByName(LPWSTR lpwstr)
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{
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SNameId *pni, **ppniPrevPtr;
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pni = FindMapping(lpwstr, PROPID_UNKNOWN, &ppniPrevPtr);
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if (pni)
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Remove(ppniPrevPtr, pni);
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}
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#endif
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//+---------------------------------------------------------------------------
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//
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// Member: CNameIdMap::RemoveById, private
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//
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// Synopsis: Removes an entry found by id
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//
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// Arguments: [id] - ID
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//
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// Returns: Appropriate status code
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//
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// History: 12-Jul-93 DrewB Created
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//
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// Notes: Entry doesn't have to exist
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//
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//----------------------------------------------------------------------------
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#ifdef REMOVE_NEEDED
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void CNameIdMap::RemoveById(PROPID id)
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{
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SNameId *pni, **ppniPrevPtr;
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pni = FindMapping(NULL, id, &ppniPrevPtr);
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if (pni)
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Remove(ppniPrevPtr, pni);
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}
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#endif
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//+---------------------------------------------------------------------------
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//
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// Member: CNameIdMap::FindMapping, private
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//
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// Synopsis: Finds a mapping by name or id
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//
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// Arguments: [lpwstr] - LPWSTR or NULL
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// [id] - ID or PROPID_UNKNOWN
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// [pppniPrevPtr] - Returns pointer to previous list element's
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// reference to found element, can be NULL
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//
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// Returns: Pointer to mapping or NULL
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//
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// Modifies: [pppniPrevPtr] if non-NULL
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//
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// History: 12-Jul-93 DrewB Created
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//
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// Notes: Depends on PROPID_UNKNOWN not being present in the list
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//
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//----------------------------------------------------------------------------
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SNameId *CNameIdMap::FindMapping(LPWSTR lpwstr,
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PROPID id,
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SNameId ***pppniPrevPtr)
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{
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SNameId **ppni;
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for (ppni = &_pniHead; *ppni; ppni = &(*ppni)->pniNext)
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if ((lpwstr && _wcsicmp(lpwstr, (*ppni)->lpwstr) == 0) ||
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id == (*ppni)->id)
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{
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if (pppniPrevPtr)
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*pppniPrevPtr = ppni;
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return *ppni;
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}
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return NULL;
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}
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