75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
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//+---------------------------------------------------------------------------
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//
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// File: strcache.h
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//
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// Contents: Insert object string caching support
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//
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// Classes: CStringCache
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//
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// History: 02-May-99 MPrabhu Created
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//
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//----------------------------------------------------------------------------
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#ifndef _STRCACHE_H_
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#define _STRCACHE_H_
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#if USE_STRING_CACHE==1
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// Allocate enough memory to carry 64 UNICODE strings of MAX length each at init
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#define CACHE_MAX_BYTES_INITIAL (64 * (OLEUI_CCHKEYMAX_SIZE*2) * sizeof(TCHAR))
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// Allocate enough memory for 128 string offsets at Init time
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#define MAX_INDEX_ENTRIES_INITIAL 128
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//+---------------------------------------------------------------------------
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//
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// Class: CStringCache
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//
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// Contents: Maintains the cache of insert object strings.
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//
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// History: 02-May-99 MPrabhu Created
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//
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//----------------------------------------------------------------------------
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class CStringCache {
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public:
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CStringCache();
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~CStringCache();
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BOOL Init();
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void CleanUp();
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void NewCall(DWORD flags, DWORD cClsidExclude);
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BOOL AddString(LPTSTR lpStrAdd);
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LPCTSTR NextString();
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void ResetEnumerator();
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BOOL FlushCache();
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BOOL IsUptodate();
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BOOL OKToUse();
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private:
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BOOL ExpandStringTable();
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BOOL ExpandOffsetTable();
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BYTE *m_pStrings; // All strings are stored sequentially in this.
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ULONG *m_pOffsetTable; // Array of offsets points to location of
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// strings in m_pStrings.
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ULONG m_ulStringCount; // Current count of strings.
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ULONG m_ulMaxStringCount; // Current limit for # of strings cache can hold
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ULONG m_ulMaxBytes; // Current limit for byte size of string cache
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// Since the cache grows as needed, both of these can
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// change over time. However, that will be very rare.
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ULONG m_ulNextStringNum; // 1 based string sequence # for enumeration
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HANDLE m_hRegEvent; // We use these to watch changes to HKCR\ClsId
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HKEY m_hRegKey; // Set to HKCR\ClsID if Init() succeeds
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DWORD m_ioFlagsPrev; // Flags passed to a previous InsertObject call
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DWORD m_cClsidExcludePrev;// cClsidExclude from a previous InsertObj call
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};
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// Functions called through OleUIInitialize/OleUIUninitialize during
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// DLL_PROCESS_ATTACH/DETACH.
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BOOL InsertObjCacheInitialize();
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void InsertObjCacheUninitialize();
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#endif // USE_STRING_CACHE==1
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#endif //_STRCACHE_H_
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