Mercurial > forge
view main/general/bitget.m @ 0:6b33357c7561 octave-forge
Initial revision
author | pkienzle |
---|---|
date | Wed, 10 Oct 2001 19:54:49 +0000 |
parents | |
children | 17636dcec976 |
line wrap: on
line source
## Copyright (C) 2000 Kai Habel ## ## This program is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 2 of the License, or ## (at your option) any later version. ## ## This program 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 General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this program; if not, write to the Free Software ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ## -*- texinfo -*- ## @deftypefn {Function File} {@var{X} =} bitget (@var{a},@var{n}) ## returns the status of bit(s) @var{n} of unsigned integers in @var{a} ## the lowest significant bit is @var{n} = 1. ## ## @example ## bitget(100,8:-1:1) ## @result{} 0 1 1 0 0 1 0 0 ## @end example ## @seealso{bitand,bitor,bitxor,bitset,bitcmp,bitshift,bitmax} ## @end deftypefn ## Author: Kai Habel <kai.habel@gmx.de> function X = bitget (A,n) if (nargin != 2) usage ("bitget(A,n)"); endif if (n < 1 || n > (log2(bitmax) + 1) ) msg = sprintf ("n must be in range [1,%d]",round(log2(bitmax)+1)); error (msg); endif if (!(is_matrix (A)) || is_complex (A)) error ("first argument must be a real value"); else X = bitand (A, pow2 (n - 1)) != 0; endif endfunction