security/nss/lib/dbm/src/h_log2.c@b8a032363ba2 (annotated)
security/nss/lib/dbm/src/h_log2.c
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /*- |
| michael@0 | 2 | * Copyright (c) 1990, 1993, 1994 |
| michael@0 | 3 | * The Regents of the University of California. All rights reserved. |
| michael@0 | 4 | * |
| michael@0 | 5 | * This code is derived from software contributed to Berkeley by |
| michael@0 | 6 | * Margo Seltzer. |
| michael@0 | 7 | * |
| michael@0 | 8 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 9 | * modification, are permitted provided that the following conditions |
| michael@0 | 10 | * are met: |
| michael@0 | 11 | * 1. Redistributions of source code must retain the above copyright |
| michael@0 | 12 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| michael@0 | 14 | * notice, this list of conditions and the following disclaimer in the |
| michael@0 | 15 | * documentation and/or other materials provided with the distribution. |
| michael@0 | 16 | * 3. ***REMOVED*** - see |
| michael@0 | 17 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change |
| michael@0 | 18 | * 4. Neither the name of the University nor the names of its contributors |
| michael@0 | 19 | * may be used to endorse or promote products derived from this software |
| michael@0 | 20 | * without specific prior written permission. |
| michael@0 | 21 | * |
| michael@0 | 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| michael@0 | 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| michael@0 | 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| michael@0 | 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| michael@0 | 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| michael@0 | 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| michael@0 | 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| michael@0 | 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| michael@0 | 32 | * SUCH DAMAGE. |
| michael@0 | 33 | */ |
| michael@0 | 34 | |
| michael@0 | 35 | #if defined(LIBC_SCCS) && !defined(lint) |
| michael@0 | 36 | static char sccsid[] = "@(#)hash_log2.c 8.2 (Berkeley) 5/31/94"; |
| michael@0 | 37 | #endif /* LIBC_SCCS and not lint */ |
| michael@0 | 38 | |
| michael@0 | 39 | #include <stdio.h> |
| michael@0 | 40 | #ifndef macintosh |
| michael@0 | 41 | #include <sys/types.h> |
| michael@0 | 42 | #endif |
| michael@0 | 43 | #include "mcom_db.h" |
| michael@0 | 44 | |
| michael@0 | 45 | uint32 __log2(uint32 num) |
| michael@0 | 46 | { |
| michael@0 | 47 | register uint32 i, limit; |
| michael@0 | 48 | |
| michael@0 | 49 | limit = 1; |
| michael@0 | 50 | for (i = 0; limit < num; limit = limit << 1, i++) {} |
| michael@0 | 51 | return (i); |
| michael@0 | 52 | } |
