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56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
NAME
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highbit - index of highest bit in binary representation of integer
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SYNOPSIS
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highbit(x)
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TYPES
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x nonzero integer
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return integer
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DESCRIPTION
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If x is a nonzero integer, highbit(x) returns the index of the
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highest bit in the binary representation of abs(x). Equivalently,
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highbit(x) = n if 2^n <= abs(x) < 2^(n + 1); the binary
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representation of x then has n + 1 digits.
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EXAMPLE
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> print highbit(2), highbit(3), highbit(4), highbit(-15), highbit(2^27)
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1 1 2 3 27
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LIMITS
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none
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LINK LIBRARY
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LEN zhighbit(ZVALUE x);
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SEE ALSO
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lowbit, digits
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## Copyright (C) 1999 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.1 $
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## @(#) $Id: highbit,v 29.1 1999/12/14 09:15:52 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/highbit,v $
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##
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## Under source code control: 1995/10/03 10:40:02
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://reality.sgi.com/chongo/
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## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
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