Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / communications-1.1.1 / oct2dec.m

diff --git a/octave_packages/communications-1.1.1/oct2dec.m b/octave_packages/communications-1.1.1/oct2dec.m
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+++ b/octave_packages/communications-1.1.1/oct2dec.m
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+## 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 (any (c(:) < 0) || any (c(:) != floor (c(:))))
+    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)