permlib  0.2.6
Library for permutation computations
 All Classes Functions Variables Typedefs Enumerations Friends
include/permlib/search/dset.h
00001 // ---------------------------------------------------------------------------
00002 //
00003 //  This file is part of PermLib.
00004 //
00005 // Copyright (c) 2009-2011 Thomas Rehn <thomas@carmen76.de>
00006 // All rights reserved.
00007 //
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions
00010 // are met:
00011 // 1. Redistributions of source code must retain the above copyright
00012 //    notice, this list of conditions and the following disclaimer.
00013 // 2. Redistributions in binary form must reproduce the above copyright
00014 //    notice, this list of conditions and the following disclaimer in the
00015 //    documentation and/or other materials provided with the distribution.
00016 // 3. The name of the author may not be used to endorse or promote products
00017 //    derived from this software without specific prior written permission.
00018 //
00019 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00020 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00021 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00022 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00023 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00024 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00025 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00026 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00028 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029 //
00030 // ---------------------------------------------------------------------------
00031 
00032 #ifndef DSET_H_
00033 #define DSET_H_
00034 
00035 #include <boost/dynamic_bitset.hpp>
00036 
00037 namespace permlib {
00038 
00040 typedef boost::dynamic_bitset<> dset;
00041 
00043 template<class PERM>
00044 struct DSetAction {
00045         DSetAction(unsigned long size) : m_tmp(size) {}
00046 
00048         dset operator()(const PERM &p, const dset& v) {
00049                 apply(p, v, m_tmp);
00050                 return m_tmp;
00051         }
00052 
00053         // apply permutation in-place
00054         void apply(const PERM &p, const dset& v, dset& tmp) {
00055                 tmp.reset();
00056                 for (unsigned int i = 0; i < tmp.size(); ++i) {
00057                         if (v[i])
00058                                 tmp.set(p / i, 1);
00059                 }
00060         }
00061 private:
00063         dset m_tmp;
00064 };
00065 
00066 
00067 } // ns permlib
00068 #endif // DSET_H_