/usr/include/gecode/int/sequence/int.hpp is in libgecode-dev 4.2.1-1.
This file is owned by root:root, with mode 0o644.
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/*
* Main authors:
* David Rijsman <David.Rijsman@quintiq.com>
*
* Contributing authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* David Rijsman, 2009
* Christian Schulte, 2009
*
* Last modified:
* $Date: 2012-09-07 17:31:22 +0200 (Fri, 07 Sep 2012) $
* $Revision: 13068 $
*
* 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
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
namespace Gecode { namespace Int { namespace Sequence {
template<class View, class Val>
forceinline
Sequence<View,Val>::Sequence(Home home, ViewArray<View>& x0, Val s0,
int q0, int l0, int u0)
: Propagator(home), x(x0), s(s0), q(q0), l(l0), u(u0),
vvsamax(home,x,s0,q0), vvsamin(home,x,s0,q0), ac(home) {
home.notice(*this,AP_DISPOSE);
for (int i=x.size(); i--; ) {
if (undecided(x[i],s)) {
x[i].subscribe(home,*new (home) SupportAdvisor<View>(home,*this,ac,i));
} else {
x[i].schedule(home,*this,x[i].assigned() ? ME_INT_VAL : ME_INT_BND);
}
}
}
namespace {
/// Helper class for updating ints or IntSets
template<class Val>
class UpdateVal {
public:
static void update(Val& n, Space& home, bool share, Val& old);
};
/// Helper class for updating ints or IntSets, specialised for int
template<>
class UpdateVal<int> {
public:
static void update(int& n, Space&, bool, int& old) {
n = old;
}
};
/// Helper class for updating ints or IntSets, specialised for IntSet
template<>
class UpdateVal<IntSet> {
public:
static void update(IntSet& n, Space& home, bool share,
IntSet& old) {
n.update(home,share,old);
}
};
}
template<class View, class Val>
forceinline
Sequence<View,Val>::Sequence(Space& home, bool share, Sequence& p)
: Propagator(home,share,p), q(p.q), l(p.l), u(p.u),
vvsamax(), vvsamin() {
UpdateVal<Val>::update(s,home,share,p.s);
x.update(home,share,p.x);
ac.update(home,share,p.ac);
vvsamax.update(home,share,p.vvsamax);
vvsamin.update(home,share,p.vvsamin);
}
template<class View,class Val>
ExecStatus
Sequence<View,Val>::advise(Space& home, Advisor& _a, const Delta& d) {
SupportAdvisor<View>& a = static_cast<SupportAdvisor<View>&>(_a);
ExecStatus status = vvsamax.advise(home,x,s,q,a.i,d);
if ( ES_NOFIX == vvsamin.advise(home,x,s,q,a.i,d) ) {
status = ES_NOFIX;
}
if (!undecided(x[a.i],s)) {
if (!x[a.i].assigned())
x[a.i].cancel(home,a);
if ( ES_NOFIX == status ) {
return home.ES_NOFIX_DISPOSE(ac,a);
} else {
return home.ES_FIX_DISPOSE(ac,a);
}
}
return status;
}
template<class View, class Val>
forceinline size_t
Sequence<View,Val>::dispose(Space& home) {
home.ignore(*this,AP_DISPOSE);
ac.dispose(home);
s.~Val();
(void) Propagator::dispose(home);
return sizeof(*this);
}
template<class View, class Val>
forceinline ExecStatus
Sequence<View,Val>::check(Space& home, ViewArray<View>& x, Val s, int q, int l, int u) {
Region r(home);
// could do this with an array of length q...
int* upper = r.alloc<int>(x.size()+1);
int* lower = r.alloc<int>(x.size()+1);
upper[0] = 0;
lower[0] = 0;
for ( int j=0; j<x.size(); j++ ) {
upper[j+1] = upper[j];
lower[j+1] = lower[j];
if (includes(x[j],s)) {
upper[j+1] += 1;
} else if (excludes(x[j],s)) {
lower[j+1] += 1;
}
if ( j+1 >= q && (q - l < lower[j+1] - lower[j+1-q] || upper[j+1] - upper[j+1-q] > u) ) {
return ES_FAILED;
}
}
return ES_OK;
}
template<class View, class Val>
ExecStatus
Sequence<View,Val>::post(Home home, ViewArray<View>& x, Val s, int q, int l, int u) {
GECODE_ES_CHECK(check(home,x,s,q,l,u));
Sequence<View,Val>* p = new (home) Sequence<View,Val>(home,x,s,q,l,u);
GECODE_ES_CHECK(p->vvsamax.propagate(home,x,s,q,l,u));
GECODE_ES_CHECK(p->vvsamin.propagate(home,x,s,q,l,u));
return ES_OK;
}
template<class View, class Val>
Actor*
Sequence<View,Val>::copy(Space& home, bool share) {
return new (home) Sequence<View,Val>(home,share,*this);
}
template<class View, class Val>
PropCost
Sequence<View,Val>::cost(const Space&, const ModEventDelta&) const {
return PropCost::cubic(PropCost::HI,x.size());
}
template<class View, class Val>
ExecStatus
Sequence<View,Val>::propagate(Space& home, const ModEventDelta&) {
GECODE_ES_CHECK(vvsamax.propagate(home,x,s,q,l,u));
GECODE_ES_CHECK(vvsamin.propagate(home,x,s,q,l,u));
for (int i=x.size(); i--; )
if (undecided(x[i],s))
return ES_FIX;
return home.ES_SUBSUMED(*this);
}
}}}
// STATISTICS: int-prop
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