/* Copyright (C) 2003 David Bateman 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, 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 software; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. In addition to the terms of the GPL, you are permitted to link this program with any Open Source program, as defined by the Open Source Initiative (www.opensource.org) */ #include <iostream> #include <iomanip> #include <sstream> #include <octave/oct.h> #include <octave/pager.h> DEFUN_DLD (__errcore__, args, , "-*- texinfo -*-\n" "@deftypefn {Loadable Function} {@var{c} =} _errcore (@var{a}, @var{b})\n" "\n" "Returns the number of bit errors comparing the matrices @var{a} and\n" "@var{b}. These matrices must be of the same size. The return matrix @var{c}\n" "will also be of the same size.\n" "\n" "This is an internal function of @dfn{biterr} and @dfn{symerr}. You should\n" "use these functions instead.\n" "@end deftypefn\n" "@seealso{biterr,symerr}") { octave_value retval; Matrix a = args(0).matrix_value(); Matrix b = args(1).matrix_value(); if ((a.rows() != b.rows()) || (a.cols() != b.cols())) { error("_errcore: Matrix mismatch"); return retval; } unsigned int sz = (sizeof(unsigned int) << 3); Matrix c(a.rows(),a.cols(),0); for (int i=0; i<a.rows(); i++) for (int j=0; j<a.cols(); j++) { unsigned int tmp = (unsigned int)a(i,j) ^ (unsigned int)b(i,j); if (tmp != 0) for (unsigned int k=0; k < sz; k++) if (tmp & (1<<k)) c(i,j)++; } retval = octave_value(c); return retval; } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */

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