common.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Guido Tack <tack@gecode.org>
* Christian Schulte <schulte@gecode.org>
*
* Contributing authors:
* Gabor Szokoli <szokoli@gecode.org>
*
* Copyright:
* Guido Tack, 2004
* Christian Schulte, 2004
* Gabor Szokoli, 2004
*
* 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
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namespace Gecode { namespace Set { namespace Sequence {
inline ExecStatus
propagateSeq(Space& home, bool& modified, bool& assigned,
ViewArray<SetView>& x) {
int lastElem = x.size()-1;
int cur_max = BndSet::MAX_OF_EMPTY;
int cur_min = BndSet::MIN_OF_EMPTY;
Region r;
Support::DynamicArray<int,Region> ub(r);
for (int i=0; i<lastElem; i++) {
if (x[i].glbSize() > 0)
cur_max = std::max(cur_max, x[i].glbMax());
if (x[i].cardMin() > 0)
cur_max = std::max(cur_max, x[i].lubMinN(x[i].cardMin()-1));
if (cur_max >= Limits::min)
GECODE_SET_ME_CHECK_VAL_B(modified,
x[i+1].exclude(home, Limits::min,
cur_max),
assigned);
if (x[lastElem-i].lubSize() > 0) {
cur_min = std::min(cur_min, x[lastElem-i].glbMin());
if (x[lastElem-i].cardMin() > 0) {
// Compute n-th largest element in x[lastElem-i].lub
// for n = x[lastElem-i].cardMin()-1
int maxN = BndSet::MAX_OF_EMPTY;
int j=0;
for (LubRanges<SetView> ubr(x[lastElem-i]); ubr(); ++ubr, ++j) {
ub[2*j]=ubr.min(); ub[2*j+1]=ubr.max();
}
unsigned int xcm = x[lastElem-i].cardMin()-1;
while (j--) {
unsigned int width = static_cast<unsigned int>(ub[2*j+1]-ub[2*j]+1);
if (width > xcm) {
maxN = static_cast<int>(ub[2*j+1]-xcm);
break;
}
xcm -= width;
}
cur_min = std::min(cur_min, maxN);
}
}
if (Limits::max>=cur_min)
GECODE_SET_ME_CHECK_VAL_B(modified,
x[lastElem-i-1].exclude(home, cur_min,
Limits::max),
assigned);
}
return ES_NOFIX;
}
}}}
// STATISTICS: set-prop
Gecode::Region
Handle to region.
Definition region.hpp:55
Gecode::Set::BndSet::MAX_OF_EMPTY
static const int MAX_OF_EMPTY
Returned by empty sets when asked for their maximum element.
Definition var-imp.hpp:110
Gecode::Set::BndSet::MIN_OF_EMPTY
static const int MIN_OF_EMPTY
Returned by empty sets when asked for their minimum element.
Definition var-imp.hpp:112
Gecode::Set::LubRanges
Range iterator for the least upper bound.
Definition var-imp.hpp:317
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Support::DynamicArray
Array with arbitrary number of elements.
Definition dynamic-array.hpp:44
Gecode::ViewArray
View arrays.
Definition array.hpp:253
Gecode::ViewArray::size
int size(void) const
Return size of array (number of elements).
Definition array.hpp:1156
Gecode::Int::Sequence::exclude
ModEvent exclude(Space &home, View &x, int s)
Prune view x to exclude all values from s.
Definition set-op.hpp:137
Gecode::Set::Limits::min
const int min
Smallest allowed integer in integer set.
Definition set.hh:99
Gecode::Set::Limits::max
const int max
Largest allowed integer in integer set.
Definition set.hh:97
Gecode::Set::Sequence
Propagators for ordered sequences of sets.
Definition sequence.hh:45
Gecode::Set::Sequence::propagateSeq
ExecStatus propagateSeq(Space &home, bool &modified, bool &assigned, ViewArray< SetView > &x)
Definition common.hpp:43
Gecode::Set
Finite integer sets.
Definition var-imp.hpp:137
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
GECODE_SET_ME_CHECK_VAL_B
#define GECODE_SET_ME_CHECK_VAL_B(modified, tell, f)
Definition common.hpp:45