402 lines
11 KiB
C++
402 lines
11 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 - 1995.
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//
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// File: crowset.hxx
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//
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// Contents: Rowset Class Declaration
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//
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//--------------------------------------------------------------------------
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#ifndef _CROWSET_H_
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#define _CROWSET_H_
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#define FIRST_ROW 0 // changing this const will require changes to crowset.cxx
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#define RESET_ROW -1
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#define STD_BMK_SIZE 1
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#define ADSI_BMK_SIZE (sizeof(RBOOKMARK))
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typedef struct tagCOLDATA
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{
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DWORD dwColOffset; // offset of column within row buffer
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DBTYPE wType; // OLEDB type of column
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} COLDATA;
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typedef struct tagROWBUFFER // header preceding all columns in a row
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{
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LONG lRefCount; // reference count of row
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LONG lRow; // row #
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DWORD cColErrors; // #columns in error in the row
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// ADS_SEARCH_COLUMN of the ADsPath attribute. Used only if
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// m_fadsPathPresent is FALSE
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ADS_SEARCH_COLUMN adsSearchCol;
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} ROWBUFFER;
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typedef struct tagOLEDBDATA
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{
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// Stores the ADS_SEARCH_COLUMN of this attribute so that it can be freed
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// later.
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ADS_SEARCH_COLUMN adsSearchCol;
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DBSTATUS dbStatus;
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DWORD dwLength;
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char *OledbValue; // Should be the last field in this structure
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} OLEDBDATA;
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typedef LONG RBOOKMARK;
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typedef enum tagFETCHDIR
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{
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FORWARD,
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BACKWARD
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} FETCHDIR;
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class CRowset : public IAccessor,
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public IColumnsInfo,
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public IConvertType,
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#if (!defined(BUILD_FOR_NT40))
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public IGetRow,
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#endif
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public IRowsetIdentity,
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public IRowsetInfo,
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public IRowsetScroll
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{
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friend class CRowProvider;
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friend class CRow;
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protected:
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CRowsetInfo *m_pCRowsetInfo;
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CImpIAccessor *m_pCAccessor;
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CRowProvider *m_pCRowProvider;
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CUtilProp *m_pCUtilProp;
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IDataConvert *m_pIDataConvert;
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IColumnsInfo *m_pIColumnsInfo;
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IRowProvider *m_pIRowProvider;
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IMalloc *m_pIMalloc;
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LONG m_lLastFetchRow;
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DWORD m_cRowBytes;
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DBORDINAL m_cCol;
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COLDATA *m_pColData;
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CRITICAL_SECTION m_RowsetCritSection;
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BOOL m_fCritSectionInitialized;
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BOOL m_fEndOfRowset;
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BOOL m_fadsPathPresent;
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BOOL m_fAllAttrs;
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LONG m_cNumRowsCached;
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FETCHDIR m_LastFetchDir;
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ROWBUFFER **m_pRowsPtr;
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DWORD m_dwRowCacheSize;
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LONG m_lCurrentRow;
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DWORD m_dwMaxCacheSize;
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DWORD m_cRef;
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// Methods
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HRESULT CopyAccessors(
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ULONG cAccessors, // accessor count
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CCommandObject *pCCommand, // Command Object
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HACCESSOR rgAccessors[] // accessors on command object
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);
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HRESULT GetColOffsets(void);
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HRESULT BringInRow(void);
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inline DWORD ColumnAlign(DWORD dwValue)
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{
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// align to next higher 8 byte boundary
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return ((dwValue+7) & (~7));
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}
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HRESULT BmkToRow(
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ULONG cbBookmark, // number of bytes in the bookmark
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const BYTE *pBookmark, // pointer to bookmark
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LONG *plRow
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);
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HRESULT SeekToRow(LONG lTargetRow);
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HRESULT SeekToEnd(void);
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inline RBOOKMARK RowToBmk(LONG lRow)
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{
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// bookmark is the same as the row
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return (RBOOKMARK) lRow;
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}
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inline LONG HROWToRow(HROW hRow)
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{
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// row handle is same as row + 1
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return ((LONG) hRow) - 1;
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}
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inline HROW RowToHROW(LONG lRow)
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{
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// row handle is same as row + 1
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return (HROW) (lRow + 1);
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}
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inline LONG HROWToIndex(HROW hRow)
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{
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int i;
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ROWBUFFER *pRowBuffer;
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for(i = 0; i < m_cNumRowsCached; i++)
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{
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pRowBuffer = m_pRowsPtr[i];
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ADsAssert(pRowBuffer);
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if( pRowBuffer->lRow == (HROWToRow(hRow)) )
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return i;
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}
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return -1; // invalid index
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}
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HRESULT GetMaxCacheSize(void);
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HRESULT IsRowObjRequested(BOOL *pfRowObjRequested);
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inline LONG RefCount(ROWBUFFER *pRowBuffer)
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{
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return pRowBuffer->lRefCount;
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}
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inline LONG IncrRefCount(ROWBUFFER *pRowBuffer)
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{
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return pRowBuffer->lRefCount++;
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}
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inline LONG DecrRefCount(ROWBUFFER *pRowBuffer)
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{
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return pRowBuffer->lRefCount--;
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}
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inline LONG Max(LONG x, LONG y)
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{
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return (x > y) ? x : y;
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}
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inline LONG Min(ULONG_PTR x, ULONG_PTR y)
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{
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return (x > y) ? y : x;
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}
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void FreeRow(ROWBUFFER *pRowBuffer);
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HRESULT GetADsPathFromHROW(HROW hRow, ADS_CASE_IGNORE_STRING *padsPath);
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public:
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CRowset(void);
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~CRowset(void);
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static
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HRESULT CreateRowset(
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CRowProvider *pIRowProvider, // The Row provider
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IUnknown *pParentObj, // parent object, a command or a session
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CSessionObject *pCSession, // Session Object
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CCommandObject *pCCommand, // Command Object
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ULONG cPropertySets, // #prop sets in rowset property group
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DBPROPSET rgPropertySets[],// properties in rowset property group
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ULONG cAccessors, // accessor count
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HACCESSOR rgAccessors[], // accessors on command object
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BOOL fadsPathPresent, // Is ADsPath present in query
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BOOL fAllAttrs, // Return all attrs from row object?
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REFIID riid, // Interface desired
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IUnknown **ppIRowset // pointer to desired interface
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);
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STDMETHODIMP FInit(
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CRowProvider *pIRowProvider, // The Row provider
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IUnknown *pParentObj, // parent object, a command or a session
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CSessionObject *pCSession, // Session Object
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CCommandObject *pCCommand, // Command Object
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ULONG cPropertySets, // #prop sets in rowset property group
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DBPROPSET rgPropertySets[],// properties in rowset property group
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ULONG cAccessors, // accessor count
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HACCESSOR rgAccessors[], // accessors on command object
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BOOL fadsPathPresent, // Is ADsPath present in query
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BOOL fAllAttrs // Return all attrs from row object?
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);
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STDMETHODIMP GetNextRows(
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HCHAPTER hChapter, // ignored since this is not a chaptered rowset
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DBROWOFFSET lRowsOffset,
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DBROWCOUNT cRows,
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DBCOUNTITEM *pcRowsObtained,
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HROW **prghRows
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);
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STDMETHODIMP GetRowsAt(
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HWATCHREGION hReserved, // Reserved for future use. Ignored.
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HCHAPTER hChapter, // ignored as this is not a chaptered rowset
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DBBKMARK cbBookmark,
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const BYTE *pBookmark,
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DBROWOFFSET lRowsOffset,
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DBROWCOUNT cRows,
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DBCOUNTITEM *pcRowsObtained,
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HROW **prghRows
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);
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STDMETHODIMP GetData(
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HROW hRow,
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HACCESSOR hAccessor,
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void *pData
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);
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STDMETHODIMP AddRefRows(
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DBCOUNTITEM cRows,
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const HROW rghRows[],
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ULONG rgRefCounts[],
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DBROWSTATUS rgRowStatus[]
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);
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STDMETHODIMP ReleaseRows(
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DBCOUNTITEM cRows,
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const HROW rghRows[],
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DBROWOPTIONS rgRowOptions[], // ignored
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ULONG rgRefCounts[],
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DBROWSTATUS rgRowStatus[]
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);
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STDMETHODIMP RestartPosition(HCHAPTER hChapter);
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STDMETHODIMP QueryInterface(THIS_ REFIID riid, LPVOID FAR* ppvObj);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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STDMETHODIMP AddRefAccessor(HACCESSOR hAccessor, DBREFCOUNT *pcRefCount);
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STDMETHODIMP CreateAccessor(
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DBACCESSORFLAGS dwAccessorFlags,
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DBCOUNTITEM cBindings,
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const DBBINDING rgBindings[],
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DBLENGTH cbRowSize,
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HACCESSOR * phAccessor,
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DBBINDSTATUS rgStatus[]
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);
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STDMETHODIMP ReleaseAccessor(HACCESSOR hAccessor, DBREFCOUNT *pcRefCount);
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STDMETHODIMP GetBindings(
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HACCESSOR hAccessor,
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DBACCESSORFLAGS * pdwAccessorFlags,
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DBCOUNTITEM * pcBindings,
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DBBINDING ** prgBindings
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);
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STDMETHODIMP GetColumnInfo(
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DBORDINAL *pcColumns,
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DBCOLUMNINFO **pprgInfo,
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WCHAR ** ppStringsBuffer
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);
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STDMETHODIMP MapColumnIDs(
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DBORDINAL cColumnIDs,
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const DBID rgColumnIDs[],
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DBORDINAL rgColumns[]
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);
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STDMETHODIMP CanConvert(
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DBTYPE wFromType,
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DBTYPE wToType,
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DBCONVERTFLAGS dwConvertFlags
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);
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STDMETHODIMP GetRowFromHROW(
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IUnknown *pUnkOuter,
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HROW hRow,
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REFIID riid,
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IUnknown **ppUnk
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);
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STDMETHODIMP GetURLFromHROW(
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HROW hRow,
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LPOLESTR *ppwszURL
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);
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STDMETHODIMP IsSameRow(
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HROW hRow1,
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HROW hRow2
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);
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STDMETHODIMP GetProperties(
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const ULONG cPropertyIDSets,
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const DBPROPIDSET rgPropertyIDSets[],
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ULONG *pcPropertySets,
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DBPROPSET **prgPropertySets
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);
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STDMETHODIMP GetReferencedRowset(
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DBORDINAL iOrdinal,
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REFIID riid,
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IUnknown **ppReferencedRowset
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);
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STDMETHODIMP GetSpecification(
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REFIID riid,
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IUnknown **ppSpecification
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);
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STDMETHODIMP Compare(
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HCHAPTER hChapter,
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DBBKMARK cbBookmark1,
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const BYTE *pBookmark1,
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DBBKMARK cbBookmark2,
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const BYTE *pBookmark2,
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DBCOMPARE *pComparison
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);
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STDMETHODIMP Hash(
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HCHAPTER hChapter,
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DBBKMARK cBookmarks,
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const DBBKMARK rgcbBookmarks[],
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const BYTE *rgpBookmarks[],
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DBHASHVALUE rgHashedValues[],
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DBROWSTATUS rgBookmarkStatus[]
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);
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STDMETHODIMP GetRowsByBookmark(
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HCHAPTER hChapter,
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DBCOUNTITEM cRows,
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const DBBKMARK rgcbBookmarks[],
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const BYTE *rgpBookmarks[],
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HROW rghRows[],
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DBROWSTATUS rgRowStatus[]
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);
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STDMETHODIMP GetApproximatePosition(
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HCHAPTER hChapter,
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DBBKMARK cbBookmark,
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const BYTE *pBookmark,
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DBCOUNTITEM *pulPosition,
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DBCOUNTITEM *pcRows
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);
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STDMETHODIMP GetRowsAtRatio(
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HWATCHREGION hReserved1,
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HCHAPTER hChapter,
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DBCOUNTITEM ulNumerator,
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DBCOUNTITEM ulDenominator,
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DBROWCOUNT cRows,
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DBCOUNTITEM *pcRowsObtained,
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HROW **prghRows
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);
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};
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#endif // _CROWSET_H_
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