permlib
0.2.6
Library for permutation computations
|
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 00033 #ifndef NEWBASECHANGE_H_ 00034 #define NEWBASECHANGE_H_ 00035 00036 #include <permlib/change/base_change.h> 00037 #include <permlib/generator/bsgs_random_generator.h> 00038 #include <permlib/construct/random_schreier_sims_construction.h> 00039 00040 namespace permlib { 00041 00043 template<class PERM, class TRANS> 00044 class NewBaseChange : public BaseChange<PERM,TRANS> { 00045 public: 00047 NewBaseChange(const BSGS<PERM,TRANS> &bsgs); 00049 ~NewBaseChange(); 00050 00052 template <class InputIterator> 00053 void change(BSGS<PERM,TRANS> &bsgs, InputIterator baseBegin, InputIterator baseEnd, bool skipRedundant = false) const; 00054 private: 00055 RandomGenerator<PERM>* rng; 00056 RandomSchreierSimsConstruction<PERM,TRANS> rssc; 00057 }; 00058 00059 00060 template<class PERM, class TRANS> 00061 NewBaseChange<PERM,TRANS>::NewBaseChange(const BSGS<PERM,TRANS> &bsgs) 00062 : rng(new BSGSRandomGenerator<PERM,TRANS>(bsgs)), 00063 rssc(bsgs.n, rng, bsgs.order()) 00064 { } 00065 00066 template<class PERM, class TRANS> 00067 NewBaseChange<PERM,TRANS>::~NewBaseChange() { 00068 delete rng; 00069 } 00070 00071 template<class PERM, class TRANS> 00072 template <class InputIterator> 00073 void NewBaseChange<PERM,TRANS>::change(BSGS<PERM,TRANS> &bsgs, InputIterator baseBegin, InputIterator baseEnd, bool skipRedundant) const { 00074 bool guarantee = false; 00075 bsgs = rssc.construct(bsgs.S.begin(), bsgs.S.end(), baseBegin, baseEnd, guarantee); 00076 BOOST_ASSERT(guarantee); 00077 } 00078 00079 } 00080 00081 #endif // -- NEWBASECHANGE_H_