mirror of
https://github.com/lcn2/calc.git
synced 2025-08-19 01:13:27 +03:00
56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
NAME
|
|
lowbit - index of lowest nonzero bit in binary representation of integer
|
|
|
|
SYNOPSIS
|
|
lowbit(x)
|
|
|
|
TYPES
|
|
x nonzero integer
|
|
|
|
return integer
|
|
|
|
DESCRIPTION
|
|
If x is a nonzero integer, lowbit(x) returns the index of the
|
|
lowest nonzero bit in the binary representation of abs(x). Equivalently,
|
|
lowbit(x) is the greatest integer for which x/2^n is an integer;
|
|
the binary representation of x then ends with n zero bits.
|
|
|
|
EXAMPLE
|
|
> print lowbit(2), lowbit(3), lowbit(4), lowbit(-15), lowbit(2^27)
|
|
1 0 2 0 27
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LINK LIBRARY
|
|
long zlowbit(ZVALUE x);
|
|
|
|
SEE ALSO
|
|
highbit, 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.
|
|
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
##
|
|
## @(#) $Revision: 29.1 $
|
|
## @(#) $Id: lowbit,v 29.1 1999/12/14 09:15:57 chongo Exp $
|
|
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/lowbit,v $
|
|
##
|
|
## Under source code control: 1995/10/03 10:40:02
|
|
## File existed as early as: 1995
|
|
##
|
|
## chongo <was here> /\oo/\ http://reality.sgi.com/chongo/
|
|
## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
|