124 lines
3.7 KiB
C++
124 lines
3.7 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Contributing authors:
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* Gabor Szokoli <szokoli@gecode.org>
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* Guido Tack <tack@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2012
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* Gabor Szokoli, 2004
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* Guido Tack, 2004
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Gecode { namespace Set { namespace Branch {
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forceinline
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ValSelMin::ValSelMin(Space& home, const ValBranch<Var>& vb)
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: ValSel<SetView,int>(home,vb) {}
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forceinline
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ValSelMin::ValSelMin(Space& home, ValSelMin& vs)
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: ValSel<SetView,int>(home,vs) {}
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forceinline int
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ValSelMin::val(const Space&, SetView x, int) {
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UnknownRanges<SetView> u(x);
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return u.min();
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}
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forceinline
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ValSelMax::ValSelMax(Space& home, const ValBranch<Var>& vb)
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: ValSel<SetView,int>(home,vb) {}
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forceinline
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ValSelMax::ValSelMax(Space& home, ValSelMax& vs)
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: ValSel<SetView,int>(home,vs) {}
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forceinline int
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ValSelMax::val(const Space&, SetView x, int) {
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int max = 0;
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for (UnknownRanges<SetView> u(x); u(); ++u)
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max = u.max();
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return max;
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}
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forceinline
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ValSelMed::ValSelMed(Space& home, const ValBranch<Var>& vb)
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: ValSel<SetView,int>(home,vb) {}
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forceinline
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ValSelMed::ValSelMed(Space& home, ValSelMed& vs)
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: ValSel<SetView,int>(home,vs) {}
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forceinline int
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ValSelMed::val(const Space&, SetView x, int) {
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UnknownRanges<SetView> u1(x);
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unsigned int i = Iter::Ranges::size(u1) / 2;
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UnknownRanges<SetView> u2(x);
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int med = (u2.min()+u2.max()) / 2;
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++u2;
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if (!u2()) {
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return med;
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}
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UnknownRanges<SetView> u3(x);
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while (i >= u3.width()) {
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i -= u3.width();
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++u3;
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}
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return u3.min() + static_cast<int>(i);
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}
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forceinline
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ValSelRnd::ValSelRnd(Space& home, const ValBranch<Var>& vb)
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: ValSel<SetView,int>(home,vb), r(vb.rnd()) {}
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forceinline
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ValSelRnd::ValSelRnd(Space& home, ValSelRnd& vs)
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: ValSel<SetView,int>(home,vs), r(vs.r) {
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}
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forceinline int
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ValSelRnd::val(const Space&, SetView x, int) {
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UnknownRanges<SetView> u(x);
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unsigned int p = r(Iter::Ranges::size(u));
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for (UnknownRanges<SetView> i(x); i(); ++i) {
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if (i.width() > p)
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return i.min() + static_cast<int>(p);
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p -= i.width();
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}
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GECODE_NEVER;
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return 0;
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}
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forceinline bool
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ValSelRnd::notice(void) const {
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return true;
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}
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forceinline void
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ValSelRnd::dispose(Space&) {
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r.~Rnd();
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}
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}}}
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// STATISTICS: set-branch
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