/usr/share/octave/packages/communications-1.2.1/oct2dec.m is in octave-communications-common 1.2.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 56 57 58 59 60 61 | ## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
##
## 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 3 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, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{d} =} oct2dec (@var{c})
##
## Convert octal to decimal values.
##
## Each element of the octal matrix @var{c} is converted to a decimal value.
##
## @seealso{base2dec, bin2dec, dec2bin}
## @end deftypefn
function d = oct2dec (c)
if (nargin != 1)
print_usage ();
endif
# Check for negative or non-integer values
if (! (all (c(:) == fix (c(:))) && all (c(:) >= 0)))
error ("oct2dec: C must be an octal matrix");
endif
d = zeros (size (c));
l = size (c, 2);
for k = 1:l
str = num2str (c(:,k), "%ld");
d(:,k) = base2dec (str, 8);
if (any (isnan (d(:,k))))
error ("oct2dec: C must be an octal matrix");
endif
endfor
endfunction
%!shared x, y
%! x = reshape ([0:79], 10, 8)(1:8,:);
%! y = reshape ([0:63], 8, 8);
%!assert (oct2dec (0), 0)
%!assert (oct2dec (77777777), 2^24 - 1)
%!assert (oct2dec (x), y)
%% Test input validation
%!error oct2dec ()
%!error oct2dec (0, 0)
%!error <octal matrix> oct2dec (0.1)
%!error <octal matrix> oct2dec (-1)
%!error <octal matrix> oct2dec (8)
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