2N/A/*-
2N/A * Copyright (c) 1990, 1993, 1994
2N/A * The Regents of the University of California. All rights reserved.
2N/A *
2N/A * This code is derived from software contributed to Berkeley by
2N/A * Margo Seltzer.
2N/A *
2N/A * Redistribution and use in source and binary forms, with or without
2N/A * modification, are permitted provided that the following conditions
2N/A * are met:
2N/A * 1. Redistributions of source code must retain the above copyright
2N/A * notice, this list of conditions and the following disclaimer.
2N/A * 2. Redistributions in binary form must reproduce the above copyright
2N/A * notice, this list of conditions and the following disclaimer in the
2N/A * documentation and/or other materials provided with the distribution.
2N/A * 3. All advertising materials mentioning features or use of this software
2N/A * must display the following acknowledgement:
2N/A * This product includes software developed by the University of
2N/A * California, Berkeley and its contributors.
2N/A * 4. Neither the name of the University nor the names of its contributors
2N/A * may be used to endorse or promote products derived from this software
2N/A * without specific prior written permission.
2N/A *
2N/A * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2N/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2N/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2N/A * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2N/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2N/A * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2N/A * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2N/A * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2N/A * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2N/A * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2N/A * SUCH DAMAGE.
2N/A */
2N/A
2N/A#if defined(LIBC_SCCS) && !defined(lint)
2N/Astatic char sccsid[] = "@(#)hash_log2.c 8.4 (Berkeley) 11/7/95";
2N/A#endif /* LIBC_SCCS and not lint */
2N/A
2N/A#include "db-int.h"
2N/A#include "hash.h"
2N/A#include "page.h"
2N/A#include "extern.h"
2N/A
2N/Au_int32_t
2N/A__kdb2_log2(num)
2N/A u_int32_t num;
2N/A{
2N/A u_int32_t i, limit;
2N/A
2N/A limit = 1;
2N/A for (i = 0; limit < num; limit = limit << 1, i++);
2N/A return (i);
2N/A}