541 lines
11 KiB
C
541 lines
11 KiB
C
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//------------------------------------------------------------------------------
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//
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// Microsoft Sidewalk
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// Copyright (C) Microsoft Corporation, 1997.
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//
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// File: oledbhelp.h
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//
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// Contents: OLE DB helper methods
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//
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// Owner: BassamT
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//
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// History: 11/30/97 BassamT Created.
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//
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//------------------------------------------------------------------------------
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#if (!defined(BUILD_FOR_NT40))
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#pragma once
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//
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// typedefs
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//
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// Column Number (cn). This number starts at 1.
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typedef ULONG CNUM;
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// Row number (rn). These numbers start at 0.
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typedef ULONG RNUM;
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// Offset (in bytes) into a structure or buffer (ob)
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typedef DWORD OFFSET;
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// Bookmark data type (bmk)
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typedef ULONG BOOKMARK;
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//
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// constants that can be tuned for performance
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//
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// The maximum number of bytes to store inline for variable size data types.
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const UINT k_cbInlineMax = 100;
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// the number of rows to fetch at once.
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const ULONG k_RowFetchCount = 20;
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// Column alignment within a row.
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// TODO : Should this be sizeof(DWORD) instead ?
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const DWORD k_ColumnAlign = 8;
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//
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// constants
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//
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// invalid row number
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const CNUM CNUM_INVALID = 0xFFFFFFFF;
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// invalid row number
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const RNUM RNUM_INVALID = 0xFFFFFFFF;
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//
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// conversion helpers
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//
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const UINT k_cchUCHARAsDecimalString = sizeof("255") - 1;
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const UINT k_cchUSHORTAsDecimalString = sizeof("32767") - 1;
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const UINT k_cchUINTAsDecimalString = sizeof("4294967294") - 1;
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const UINT k_cchUINTAsHexString = sizeof("FFFFFFFF") - 1;
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const UINT k_cchINTAsDecimalString = sizeof("-2147483648") - 1;
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const UINT k_cchBOOLAsDecimalString = sizeof("1") - 1;
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const UINT k_cchDOUBLEAsDecimalString = sizeof("2.2250738585072014 E + 308") - 1;
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//
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// macros
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//
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#define static_wcslen(pwsz) ((sizeof(pwsz) / sizeof(WCHAR)) - 1)
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#define inrange(z,zmin,zmax) ( (zmin) <= (z) && (z) <= (zmax) )
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#define DBID_USE_GUID_OR_PGUID(e) \
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((1<<(e)) & \
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( 1<<DBKIND_GUID \
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| 1<<DBKIND_GUID_NAME \
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| 1<<DBKIND_GUID_PROPID \
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| 1<<DBKIND_PGUID_NAME \
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| 1<<DBKIND_PGUID_PROPID ))
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#define DBID_USE_GUID(e) \
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((1<<(e)) & \
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( 1<<DBKIND_GUID \
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| 1<<DBKIND_GUID_NAME \
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| 1<<DBKIND_GUID_PROPID ))
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#define DBID_USE_PGUID(e) \
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((1<<(e)) & \
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( 1<<DBKIND_PGUID_NAME \
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| 1<<DBKIND_PGUID_PROPID ))
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#define DBID_USE_NAME(e) \
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((1<<(e)) & \
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( 1<<DBKIND_NAME \
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| 1<<DBKIND_GUID_NAME \
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| 1<<DBKIND_PGUID_NAME ))
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#define DBID_USE_PROPID(e) \
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((1<<(e)) & \
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( 1<<DBKIND_PROPID \
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| 1<<DBKIND_GUID_PROPID \
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| 1<<DBKIND_PGUID_PROPID ))
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#define DBID_IS_BOOKMARK(dbid) \
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( DBID_USE_GUID(dbid.eKind) && dbid.uGuid.guid == DBCOL_SPECIALCOL \
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|| DBID_USE_PGUID(dbid.eKind) && *dbid.uGuid.pguid == DBCOL_SPECIALCOL )
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#define SET_DBID_FROM_NAME(dbid, pwsz) \
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dbid.eKind = DBKIND_NAME;\
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dbid.uName.pwszName = pwsz;
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#define IsBadPointer(v) (IsBadReadPtr((void*)hAccessor, sizeof(void*)))
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//
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// functions
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//
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inline DWORD RoundDown(DWORD dwSize, DWORD dwAmount)
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{
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return dwSize & ~(dwAmount - 1);
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}
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inline DWORD RoundUp(DWORD dwSize, DWORD dwAmount)
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{
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return (dwSize + (dwAmount - 1)) & ~(dwAmount - 1);
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}
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#define CLIENT_MALLOC(cb) (CoTaskMemAlloc(cb))
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#define CLIENT_FREE(x) (CoTaskMemFree(x), x = NULL)
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HRESULT CopyDBIDs(DBID * pdbidDest, const DBID *pdbidSrc);
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BOOL CompareDBIDs(const DBID *pdbid1, const DBID *pdbid2);
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HRESULT IsValidDBID(const DBID *pdbid);
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void FreeDBID(DBID *pdbid);
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INT CompareOLEDBTypes(DBTYPE wType, void * pvValue1, void * pvValue2);
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inline BOOL IsColumnVarLength
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//------------------------------------------------------------------------------
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// return TRUE if the column is of a variable length type
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(
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DBTYPE wType
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)
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{
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if (wType == DBTYPE_BSTR ||
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wType == DBTYPE_STR ||
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wType == DBTYPE_WSTR ||
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wType == DBTYPE_BYTES)
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{
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return TRUE;
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}
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return FALSE;
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}
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inline DWORD AdjustVariableTypesLength
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//------------------------------------------------------------------------------
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// adjusts the length of variable length data types
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(
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DBTYPE wType,
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DWORD cb
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)
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{
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if (wType == DBTYPE_STR)
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{
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return cb + 1;
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}
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if (wType == DBTYPE_WSTR)
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{
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return cb + sizeof(WCHAR);
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}
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return cb;
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}
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inline USHORT GetColumnMaxPrecision
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//------------------------------------------------------------------------------
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// returns the maximium possible precision of a column, given its type.
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// Do not pass a byref, array, or vector column type.
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(
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DBTYPE wType
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// [in] the OLE DB data type
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)
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{
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if ((wType & DBTYPE_BYREF) ||
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(wType & DBTYPE_ARRAY) ||
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(wType & DBTYPE_VECTOR))
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{
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Assert (FALSE);
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return 0;
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}
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switch( wType )
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{
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case DBTYPE_I1:
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case DBTYPE_UI1:
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return 3;
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case DBTYPE_I2:
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case DBTYPE_UI2:
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return 5;
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case DBTYPE_I4:
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case DBTYPE_UI4:
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return 10;
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case DBTYPE_R4:
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return 7;
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case DBTYPE_I8:
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return 19;
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case DBTYPE_UI8:
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return 20;
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case DBTYPE_R8:
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return 16;
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case DBTYPE_DATE:
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return 8;
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case DBTYPE_CY:
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return 19;
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case DBTYPE_DECIMAL:
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return 28;
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case DBTYPE_NUMERIC:
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return 38;
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case DBTYPE_EMPTY:
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case DBTYPE_NULL:
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case DBTYPE_ERROR:
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case DBTYPE_BOOL:
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case DBTYPE_BSTR:
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case DBTYPE_IDISPATCH:
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case DBTYPE_IUNKNOWN:
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case DBTYPE_VARIANT:
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case DBTYPE_GUID:
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case DBTYPE_BYTES:
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case DBTYPE_STR:
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case DBTYPE_WSTR:
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case DBTYPE_DBDATE:
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case DBTYPE_DBTIME:
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case DBTYPE_DBTIMESTAMP:
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case DBTYPE_HCHAPTER:
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return 0;
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default:
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Assert (FALSE && "Unsupported data type");
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return 0;
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}
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}
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inline ULONG GetColumnSize
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//------------------------------------------------------------------------------
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// returns the size of the column in bytes
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(
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DBTYPE wType,
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// [in] the OLE DB data type
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DWORD cchMaxLength
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// [in] if this is a variable size field then this is the max length
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// if there is one defined. Otherwise this is 0xFFFFFFFF
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)
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{
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// Handle BYREF destination separately
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if ((wType & DBTYPE_BYREF) ||
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(wType & DBTYPE_ARRAY) ||
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(wType & DBTYPE_VECTOR))
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{
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return sizeof(void*);
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}
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switch( wType )
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{
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case DBTYPE_EMPTY:
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case DBTYPE_NULL:
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return 0;
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case DBTYPE_I2:
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case DBTYPE_UI2:
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return 2;
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case DBTYPE_I4:
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case DBTYPE_R4:
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case DBTYPE_UI4:
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return 4;
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case DBTYPE_I8:
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case DBTYPE_R8:
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case DBTYPE_DATE:
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case DBTYPE_UI8:
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return 8;
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case DBTYPE_ERROR:
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return sizeof(SCODE);
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case DBTYPE_BOOL:
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return sizeof(VARIANT_BOOL);
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case DBTYPE_CY:
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return sizeof(CY);
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case DBTYPE_BSTR:
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return sizeof(BSTR);
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case DBTYPE_IDISPATCH:
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return sizeof(IDispatch*);
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case DBTYPE_IUNKNOWN:
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return sizeof(IUnknown*);
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case DBTYPE_VARIANT:
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return sizeof(VARIANT);
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case DBTYPE_DECIMAL:
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return sizeof(DECIMAL);
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case DBTYPE_I1:
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case DBTYPE_UI1:
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return 1;
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case DBTYPE_GUID:
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return sizeof(GUID);
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case DBTYPE_BYTES:
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return cchMaxLength;
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case DBTYPE_STR:
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return cchMaxLength * sizeof(char);
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case DBTYPE_WSTR:
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return cchMaxLength * sizeof(WCHAR);
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case DBTYPE_NUMERIC:
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return sizeof(DB_NUMERIC);
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case DBTYPE_DBDATE:
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return sizeof(DBDATE);
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case DBTYPE_DBTIME:
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return sizeof(DBTIME);
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case DBTYPE_DBTIMESTAMP:
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return sizeof(DBTIMESTAMP);
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case DBTYPE_HCHAPTER:
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return sizeof(HCHAPTER);
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|
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default:
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Assert (FALSE && "Unsupported data type");
|
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return 0;
|
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|
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}
|
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|
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}
|
||
|
|
|
||
|
|
//
|
||
|
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// IUnknown Macros
|
||
|
|
//
|
||
|
|
|
||
|
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// put this macros in your class definition. Make sure that
|
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|
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// you inherit from IUnknown and that you use the
|
||
|
|
// INIT_IUNKNOWN macro in your class constructor
|
||
|
|
#define DEFINE_IUNKNOWN \
|
||
|
|
private:\
|
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|
|
LONG _cRefs;\
|
||
|
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public:\
|
||
|
|
STDMETHOD(InternalQueryInterface)(REFIID riid, void ** ppv);\
|
||
|
|
STDMETHOD(QueryInterface)(REFIID riid, void ** ppv)\
|
||
|
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{\
|
||
|
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return InternalQueryInterface(riid, ppv);\
|
||
|
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}\
|
||
|
|
STDMETHOD_(ULONG,AddRef)() \
|
||
|
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{\
|
||
|
|
return InterlockedIncrement(&_cRefs);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,Release)()\
|
||
|
|
{\
|
||
|
|
if (InterlockedDecrement(&_cRefs) == 0)\
|
||
|
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{\
|
||
|
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delete this;\
|
||
|
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return 0;\
|
||
|
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}\
|
||
|
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return _cRefs;\
|
||
|
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}
|
||
|
|
|
||
|
|
#define INIT_IUNKNOWN _cRefs = 1;
|
||
|
|
|
||
|
|
#define DEFINE_IUNKNOWN_WITH_CALLBACK(x) \
|
||
|
|
private:\
|
||
|
|
LONG _cRefs;\
|
||
|
|
public:\
|
||
|
|
STDMETHOD(InternalQueryInterface)(REFIID riid, void ** ppv);\
|
||
|
|
STDMETHOD(QueryInterface)(REFIID riid, void ** ppv)\
|
||
|
|
{\
|
||
|
|
return InternalQueryInterface(riid, ppv);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,AddRef)() \
|
||
|
|
{\
|
||
|
|
return InterlockedIncrement(&_cRefs);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,Release)()\
|
||
|
|
{\
|
||
|
|
if (InterlockedDecrement(&_cRefs) == 0)\
|
||
|
|
{\
|
||
|
|
x();\
|
||
|
|
return 0;\
|
||
|
|
}\
|
||
|
|
return _cRefs;\
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// put this macros in your class definition. Make sure that
|
||
|
|
// you inherit from IUnknown and that you use the
|
||
|
|
// INIT_AGGREGATE_IUNKNOWN macro in your class constructor.
|
||
|
|
// Also make sure that you use SET_OUTER_IUNKNOWN in wherever
|
||
|
|
// you get a pointer to the Outer IUnknown
|
||
|
|
interface INonDelegatingUnknown
|
||
|
|
{
|
||
|
|
virtual HRESULT STDMETHODCALLTYPE NonDelegatingQueryInterface
|
||
|
|
(
|
||
|
|
REFIID riid,
|
||
|
|
void __RPC_FAR *__RPC_FAR *ppvObject
|
||
|
|
) = 0;
|
||
|
|
virtual ULONG STDMETHODCALLTYPE NonDelegatingAddRef(void) = 0;
|
||
|
|
virtual ULONG STDMETHODCALLTYPE NonDelegatingRelease(void) = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define DEFINE_AGGREGATE_IUNKNOWN \
|
||
|
|
private:\
|
||
|
|
IUnknown * _punkOuter;\
|
||
|
|
LONG _cRefs;\
|
||
|
|
public:\
|
||
|
|
STDMETHOD(InternalQueryInterface)(REFIID riid, void ** ppv);\
|
||
|
|
STDMETHOD(NonDelegatingQueryInterface)(REFIID riid, void ** ppv)\
|
||
|
|
{\
|
||
|
|
if (ppv == NULL) return E_INVALIDARG;\
|
||
|
|
if (riid != IID_IUnknown)\
|
||
|
|
{\
|
||
|
|
return InternalQueryInterface(riid, ppv);\
|
||
|
|
}\
|
||
|
|
else\
|
||
|
|
{\
|
||
|
|
*ppv = static_cast<INonDelegatingUnknown*>(this);\
|
||
|
|
NonDelegatingAddRef();\
|
||
|
|
return NOERROR;\
|
||
|
|
}\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,NonDelegatingAddRef)() \
|
||
|
|
{\
|
||
|
|
return InterlockedIncrement(&_cRefs);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,NonDelegatingRelease)()\
|
||
|
|
{\
|
||
|
|
if (InterlockedDecrement(&_cRefs) == 0)\
|
||
|
|
{\
|
||
|
|
delete this;\
|
||
|
|
return 0;\
|
||
|
|
}\
|
||
|
|
return _cRefs;\
|
||
|
|
}\
|
||
|
|
STDMETHOD(QueryInterface)(REFIID riid, void ** ppv)\
|
||
|
|
{\
|
||
|
|
return _punkOuter->QueryInterface(riid, ppv);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,AddRef)() \
|
||
|
|
{\
|
||
|
|
return _punkOuter->AddRef();\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,Release)()\
|
||
|
|
{\
|
||
|
|
return _punkOuter->Release();\
|
||
|
|
}
|
||
|
|
|
||
|
|
#define INIT_AGGREGATE_IUNKNOWN \
|
||
|
|
_punkOuter = reinterpret_cast<IUnknown*>(static_cast<INonDelegatingUnknown*>(this)); \
|
||
|
|
_cRefs = 1;
|
||
|
|
|
||
|
|
#define SET_OUTER_IUNKNOWN(punk) if (punk != NULL) _punkOuter = punk;
|
||
|
|
|
||
|
|
|
||
|
|
#define DEFINE_AGGREGATE_IUNKNOWN_WITH_CALLBACKS(_AddRef, _Release) \
|
||
|
|
private:\
|
||
|
|
IUnknown * _punkOuter;\
|
||
|
|
LONG _cRefs;\
|
||
|
|
public:\
|
||
|
|
STDMETHOD(InternalQueryInterface)(REFIID riid, void ** ppv);\
|
||
|
|
STDMETHOD(NonDelegatingQueryInterface)(REFIID riid, void ** ppv)\
|
||
|
|
{\
|
||
|
|
if (ppv == NULL) return E_INVALIDARG;\
|
||
|
|
if (riid != IID_IUnknown)\
|
||
|
|
{\
|
||
|
|
return InternalQueryInterface(riid, ppv);\
|
||
|
|
}\
|
||
|
|
else\
|
||
|
|
{\
|
||
|
|
*ppv = static_cast<INonDelegatingUnknown*>(this);\
|
||
|
|
NonDelegatingAddRef();\
|
||
|
|
return NOERROR;\
|
||
|
|
}\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,NonDelegatingAddRef)() \
|
||
|
|
{\
|
||
|
|
_AddRef();\
|
||
|
|
return InterlockedIncrement(&_cRefs);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,NonDelegatingRelease)()\
|
||
|
|
{\
|
||
|
|
_Release();\
|
||
|
|
if (InterlockedDecrement(&_cRefs) == 0)\
|
||
|
|
{\
|
||
|
|
delete this;\
|
||
|
|
return 0;\
|
||
|
|
}\
|
||
|
|
return _cRefs;\
|
||
|
|
}\
|
||
|
|
STDMETHOD(QueryInterface)(REFIID riid, void ** ppv)\
|
||
|
|
{\
|
||
|
|
return _punkOuter->QueryInterface(riid, ppv);\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,AddRef)() \
|
||
|
|
{\
|
||
|
|
return _punkOuter->AddRef();\
|
||
|
|
}\
|
||
|
|
STDMETHOD_(ULONG,Release)()\
|
||
|
|
{\
|
||
|
|
return _punkOuter->Release();\
|
||
|
|
}
|
||
|
|
#endif
|