DbBookmark.cpp

// Version 01.03.03.09
//
// This source file has been released by Centre Technologies Ltd. under The BSD License. 
//
// The BSD License 
// Copyright (c) 2008-2009, Centre Technologies Ltd.
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#include "StdAfx.h"
#include "DbBookmark.h"
#include "DbEngine.h"
#include "DbCursor.h"

#ifndef JET_paramKeyMost
#define JET_paramKeyMost						134
#endif

DbBookmark::DbBookmark(DbSession *session)
: _session(session), _bookmark(NULL), _size(0)
{
	_cbMax = JET_cbBookmarkMost;

	// In Vista/2008 max bookmark size can grow beyond JET_cbBookmarkMost. Adjust if necessary!
	// See JetGetBookmark() for more info
	int paramKeyMost;
	JET_ERR rc = session->get_engine()->get_system_parameter(session, JET_paramKeyMost, (JET_API_PTR *)&paramKeyMost, NULL, 0);
	if (rc == JET_errSuccess)
	{
		_cbMax = (paramKeyMost+1) > (int)_cbMax ? (paramKeyMost+1) : _cbMax;
	}
	else if (rc != JET_errInvalidParameter) // i.e. not XP/2003
	{
		ERR_LOG( rc )
	}

	_bookmark = new unsigned char[_cbMax];
}

DbBookmark::~DbBookmark(void)
{
	delete []_bookmark;
}

JET_ERR
DbBookmark::set_position(DbCursor *cursor)
{
	JET_ERR rc;

	ERR_RET( JetGotoBookmark(_session->get_sesid(), cursor->get_tableid(), _bookmark, _size) )

	return JET_errSuccess;
}