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## Copyright (C) 1996 Kurt Hornik
##
## This file is part of Octave.
##
## Octave 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, or (at your option)
## any later version.
##
## Octave 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 Octave; see the file COPYING. If not, write to the Free
## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
## usage: dec2bin (x)
##
## Returns the binary number corresponding to the nonnegative integer
## x. For example, dec2bin (14) returns "1110".
## Author: Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>
## Adapted-By: jwe
function y = dec2bin (x)
if (nargin != 1)
usage ("dec2bin (x)");
endif
[nr, nc] = size (x);
len = nr * nc;
x = reshape (x, 1, len);
eleo = empty_list_elements_ok;
unwind_protect
empty_list_elements_ok = 1;
y = [];
for i = 1:len
tmp = x (i);
if (tmp == round (tmp) && tmp >= 0)
while (tmp >= 2)
z = fix (tmp ./ 2);
y = [y, tmp - 2 * z];
tmp = z;
endwhile
y = [y, tmp];
else
error ("dec2hex: invalid conversion");
endif
endfor
y = fliplr (y);
y = setstr (y + toascii ("0"));
unwind_protect_cleanup
empty_list_elements_ok = eleo;
end_unwind_protect
endfunction
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