2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these librararies and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
24 /*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
25 /*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
26 /*%% (c) Copyright 1993, 1994 Novell, Inc. */
27 /*%% $XConsortium: iskeycalc.c /main/3 1995/10/23 11:41:29 rswiston $ */
29 static char sccsid[] = "@(#)iskeycalc.c 1.3 89/07/17 Copyr 1988 Sun Micro";
32 * Copyright (c) 1988 by Sun Microsystems, Inc.
39 * Key related calculation functions
42 #include "isam_impl.h"
45 /* getkeysperleaf() - Calculate number of keys per leaf node */
47 getkeysperleaf (keylen)
52 n = ((ISPAGESIZE - BT_KEYS_OFF) / keylen);
54 return (le_odd (n)); /* n or n-1 */
57 /* getkeyspernode() - Calculate number of keys per non-leaf node */
59 getkeyspernode (keylen)
64 n = ((ISPAGESIZE - BT_KEYS_OFF) / (keylen + BLKNOSIZE));
66 return (le_odd (n)); /* n or n-1 */
70 /* le_odd(n) - Get next lower or equal odd number */