/usr/include/rheolef/gauss_jacobi_check.icc is in librheolef-dev 6.7-6.
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 | /// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito
///
/// Rheolef 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 of the License, or
/// (at your option) any later version.
///
/// Rheolef 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 Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/// lexer for qmg mesh files
/// =========================================================================
#include "rheolef/compiler.h"
#include <iterator>
template <class Iterator1, class Iterator2, class Size>
typename std::iterator_traits<Iterator1>::value_type
gauss_jacobi_check (Size R, Size p, Size q, Iterator1 zeta, Iterator2 omega,
Size Rtilde, Iterator1 x, Iterator2 w, Size order)
{
warning_macro ("gauss_jacobi_check...");
typedef typename std::iterator_traits<Iterator1>::value_type T;
T error = 0;
for (Size k = 0; k <= order; k++) {
T exact = 0, value = 0;
for (Size s = 0; s < Rtilde; s++)
exact += pow (x[s], k)*pow (1-x[s], p)*pow (1+x[s], q)*w[s];
for (Size r = 0; r < R; r++)
value += pow (zeta[r], k)*omega[r];
error = std::max(error, fabs (exact - value));
}
warning_macro ("gauss_jacobi_check: done : error="<<error);
return error;
}
|