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## Copyright (C) 2006 Muthiah Annamalai <muthiah.annamalai@uta.edu>
##
## 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} {} rledeco (@var{message})
##
## Returns decoded run-length @var{message}. The RLE encoded @var{message}
## has to be in the form of a row-vector. The message format (encoded RLE)
## is like repetition [factor, value]+.
##
## An example use of @code{rledeco} is
## @example
## @group
## message = [1 5 2 4 3 1];
## rledeco (message)
##     @result{} [5 4 4 1 1 1]
## @end group
## @end example
## @seealso{rledeco}
## @end deftypefn

function rmsg = rledeco (message)

  if (nargin != 1)
    print_usage ();
  endif
  rmsg = [];
  L = length (message);
  itr = 1;
  while (itr < L)
    times = message(itr);
    val = message(itr+1);
    rmsg = [rmsg val * (ones (1, times))];
    itr = itr + 2;
  endwhile

endfunction

%!assert (rledeco ([1 5 2 4 3 1]), [5 4 4 1 1 1])

%% Test input validation
%!error rledeco ()
%!error rledeco (1, 2)