sym-imp.cpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christopher Mears <chris.mears@monash.edu>
 *
 *  Copyright:
 *     Christopher Mears, 2012
 *
 *  Last modified:
 *     $Date: 2013-05-13 07:50:41 +0200 (Mon, 13 May 2013) $ by $Author: mears $
 *     $Revision: 13633 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
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 *  permit persons to whom the Software is furnished to do so, subject to
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#include <gecode/int/ldsb.hh>
#include <gecode/int/branch.hh>

namespace Gecode { namespace Int { namespace LDSB {
  template <>
  ArgArray<Literal>
  VariableSymmetryImp<IntView>
  ::symmetric(Literal l, const ViewArray<IntView>& x) const {
    (void) x;
    if (indices.valid(l._variable) && indices.get(l._variable)) {
      int n = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
        n++;
      ArgArray<Literal> lits(n);
      int j = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
        lits[j++] = Literal(i.val(), l._value);
      return lits;
    } else {
      return ArgArray<Literal>(0);
    }
  }
  template <>
  ArgArray<Literal>
  VariableSymmetryImp<BoolView>
  ::symmetric(Literal l, const ViewArray<BoolView>& x) const {
    (void) x;
    if (indices.valid(l._variable) && indices.get(l._variable)) {
      int n = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
        n++;
      ArgArray<Literal> lits(n);
      int j = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
        lits[j++] = Literal(i.val(), l._value);
      return lits;
    } else {
      return ArgArray<Literal>(0);
    }
  }

  template <>
  ArgArray<Literal>
  ValueSymmetryImp<IntView>
  ::symmetric(Literal l, const ViewArray<IntView>& x) const {
    (void) x;
    if (values.valid(l._value) && values.get(l._value)) {
      int n = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(values) ; i() ; ++i)
        n++;
      ArgArray<Literal> lits(n);
      int j = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(values) ; i() ; ++i)
        lits[j++] = Literal(l._variable, i.val());
      return lits;
    } else {
      return ArgArray<Literal>(0);
    }
  }
  template <>
  ArgArray<Literal>
  ValueSymmetryImp<BoolView>
  ::symmetric(Literal l, const ViewArray<BoolView>& x) const {
    (void) x;
    if (values.valid(l._value) && values.get(l._value)) {
      int n = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(values) ; i() ; ++i)
        n++;
      ArgArray<Literal> lits(n);
      int j = 0;
      for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(values) ; i() ; ++i)
        lits[j++] = Literal(l._variable, i.val());
      return lits;
    } else {
      return ArgArray<Literal>(0);
    }
  }

  template <>
  ArgArray<Literal>
  ValueSequenceSymmetryImp<Int::IntView>
  ::symmetric(Literal l, const ViewArray<IntView>& x) const {
    (void) x;
    Support::DynamicStack<Literal, Heap> s(heap);
    std::pair<int,int> location = findVar(values, n_values, seq_size, l._value);
    if (location.first == -1) return dynamicStackToArgArray(s);
    unsigned int seqNum = location.first;
    unsigned int seqPos = location.second;
    if (! dead_sequences.get(seqNum)) {
      for (unsigned int seq = 0 ; seq < n_seqs ; seq++) {
        if (seq == seqNum) continue;
        if (dead_sequences.get(seq)) continue;
        s.push(Literal(l._variable, getVal(seq,seqPos)));
      }
    }
    return dynamicStackToArgArray(s);
  }
  template <>
  ArgArray<Literal>
  ValueSequenceSymmetryImp<BoolView>
  ::symmetric(Literal l, const ViewArray<BoolView>& x) const {
    (void) x;
    Support::DynamicStack<Literal, Heap> s(heap);
    std::pair<int,int> location = findVar(values, n_values, seq_size, l._value);
    if (location.first == -1) return dynamicStackToArgArray(s);
    unsigned int seqNum = location.first;
    unsigned int seqPos = location.second;
    if (! dead_sequences.get(seqNum)) {
      for (unsigned int seq = 0 ; seq < n_seqs ; seq++) {
        if (seq == seqNum) continue;
        if (dead_sequences.get(seq)) continue;
        s.push(Literal(l._variable, getVal(seq,seqPos)));
      }
    }
    return dynamicStackToArgArray(s);
  }

}}}

// STATISTICS: int-branch