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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | NAME
highbit - index of highest bit in binary representation of integer
SYNOPSIS
highbit(x)
TYPES
x nonzero integer
return integer
DESCRIPTION
If x is a nonzero integer, highbit(x) returns the index of the
highest bit in the binary representation of abs(x). Equivalently,
highbit(x) = n if 2^n <= abs(x) < 2^(n + 1); the binary
representation of x then has n + 1 digits.
EXAMPLE
; print highbit(2), highbit(3), highbit(4), highbit(-15), highbit(2^27)
1 1 2 3 27
LIMITS
none
LINK LIBRARY
LEN zhighbit(ZVALUE x);
SEE ALSO
lowbit, digits
## Copyright (C) 1999 Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL. You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: highbit,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/bin/calc/help/RCS/highbit,v $
##
## Under source code control: 1995/10/03 10:40:02
## File existed as early as: 1995
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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