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70 lines
2.1 KiB
70 lines
2.1 KiB
///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1998, Microsoft Corp. All rights reserved.
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//
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// FILE
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//
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// bind.h
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//
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// SYNOPSIS
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//
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// This file declares various macros and helper functions for binding
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// an OLE-DB accessor to the members of a class.
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//
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// MODIFICATION HISTORY
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//
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// 02/20/1998 Original version.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _BIND_H_
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#define _BIND_H_
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#include <oledb.h>
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namespace Bind
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{
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// Returns the buffer size required for a given DBBINDING array.
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DBLENGTH getRowSize(DBCOUNTITEM cBindings,
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const DBBINDING rgBindings[]) throw ();
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// Creates an accessor on the pUnk object.
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HACCESSOR createAccessor(IUnknown* pUnk,
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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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// Releases an accessor on the pUnk object.
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void releaseAccessor(IUnknown* pUnk,
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HACCESSOR hAccessor) throw ();
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}
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//////////
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// Marks the beginning of DBBINDING map.
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//////////
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#define BEGIN_BIND_MAP(class, name, flags) \
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HACCESSOR create ## name(IUnknown* p) const \
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{ typedef class _theClass; \
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const DBACCESSORFLAGS dbFlags = flags; \
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static const DBBINDING binding[] = {
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//////////
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// Terminates a DBBINDING map.
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//////////
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#define END_BIND_MAP() \
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}; const DBCOUNTITEM count = sizeof(binding)/sizeof(DBBINDING); \
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static const DBLENGTH rowsize = Bind::getRowSize(count, binding); \
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return Bind::createAccessor(p, dbFlags, count, binding, rowsize); \
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}
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//////////
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// Entry in a DBBINDING map. Entries must be separated by commas.
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//////////
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#define BIND_COLUMN(member, ordinal, type) \
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{ ordinal, offsetof(_theClass, member), 0, 0, NULL, NULL, NULL, \
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DBPART_VALUE, DBMEMOWNER_CLIENTOWNED, \
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(dbFlags == DBACCESSOR_ROWDATA ? DBPARAMIO_NOTPARAM : DBPARAMIO_INPUT), \
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sizeof(_theClass :: member), 0, type, 0, 0 }
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#endif // _BIND_H_
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