violations.hpp
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2009 00008 * 00009 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 #include <climits> 00035 #include <cmath> 00036 00037 namespace Gecode { namespace Int { namespace Sequence { 00038 00040 class Violations : public Support::BitSetBase { 00041 protected: 00043 mutable unsigned int fst; 00044 public: 00046 Violations(void); 00048 void init(Space& home, unsigned int n); 00050 void update(Space& home, Violations& v); 00052 bool empty(void) const; 00054 void add(unsigned int i); 00056 unsigned int get(void); 00057 }; 00058 00059 00060 forceinline 00061 Violations::Violations(void) : fst(0) {} 00062 00063 forceinline void 00064 Violations::init(Space& home, unsigned int n) { 00065 Support::BitSetBase::init(home,n); 00066 fst=size(); 00067 } 00068 00069 forceinline bool 00070 Violations::empty(void) const { 00071 fst = next(fst); 00072 return fst >= size(); 00073 } 00074 00075 forceinline void 00076 Violations::update(Space& home, Violations& v) { 00077 assert(v.empty()); 00078 init(home,v.size()); 00079 } 00080 00081 forceinline void 00082 Violations::add(unsigned int i) { 00083 set(i); if (i < fst) fst = i; 00084 } 00085 00086 forceinline unsigned int 00087 Violations::get(void) { 00088 assert(!empty()); 00089 fst = next(fst); 00090 assert(Support::BitSetBase::get(fst)); 00091 clear(fst); fst++; 00092 return fst-1; 00093 } 00094 00095 }}} 00096 00097 // STATISTICS: int-prop