2 ilog2 - floor of logarithm to base 2
13 Returns the greatest integer n for which 2^n <= abs(x).
16 ; print ilog2(1), ilog2(2), ilog2(3), ilog2(4), ilog(1/15)
23 long qilog2(NUMBER *q)
28 ## Copyright (C) 1999 Landon Curt Noll
30 ## Calc is open software; you can redistribute it and/or modify it under
31 ## the terms of the version 2.1 of the GNU Lesser General Public License
32 ## as published by the Free Software Foundation.
34 ## Calc is distributed in the hope that it will be useful, but WITHOUT
35 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
36 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
37 ## Public License for more details.
39 ## A copy of version 2.1 of the GNU Lesser General Public License is
40 ## distributed with calc under the filename COPYING-LGPL. You should have
41 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
42 ## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
44 ## @(#) $Revision: 30.1 $
45 ## @(#) $Id: ilog2,v 30.1 2007/03/16 11:10:42 chongo Exp $
46 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/ilog2,v $
48 ## Under source code control: 1995/10/03 10:40:02
49 ## File existed as early as: 1995
51 ## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
52 ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/