3 * Implementation of several small and furry utilities. */
6 * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 /** Integer binary logarithm */
28 unsigned log2(unsigned n)
31 for (k = 0; n > 1; n >>= 1) ++k;
35 /** Compare two pointers (just to establish some sort of canonical order).
36 * @return -1, 0, or 1 */
37 int compare_pointers(void const * a, void const * b)
48 // comment skeleton for header files
53 // default constructor, destructor, copy constructor assignment operator and helpers
59 // functions overriding virtual functions from bases classes
62 // new virtual functions which can be overridden by derived classes
65 // non-virtual functions in this class
73 // comment skeleton for implementation files
77 // default constructor, destructor, copy constructor assignment operator and helpers
91 // functions overriding virtual functions from bases classes
99 // new virtual functions which can be overridden by derived classes
107 // non-virtual functions in this class
115 // static member variables