violations.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* 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
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* 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,
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#include <climits>
#include <cmath>
namespace Gecode { namespace Int { namespace Sequence {
class Violations : public Support::BitSetBase {
protected:
mutable unsigned int fst;
public:
Violations(void);
void init(Space& home, unsigned int n);
void update(Space& home, Violations& v);
bool empty(void) const;
void add(unsigned int i);
unsigned int get(void);
};
forceinline
Violations::Violations(void) : fst(0) {}
forceinline void
Violations::init(Space& home, unsigned int n) {
Support::BitSetBase::init(home,n);
fst=size();
}
forceinline bool
Violations::empty(void) const {
fst = next(fst);
return fst >= size();
}
forceinline void
Violations::update(Space& home, Violations& v) {
assert(v.empty());
init(home,v.size());
}
forceinline void
Violations::add(unsigned int i) {
set(i); if (i < fst) fst = i;
}
forceinline unsigned int
Violations::get(void) {
assert(!empty());
fst = next(fst);
assert(Support::BitSetBase::get(fst));
clear(fst); fst++;
return fst-1;
}
}}}
// STATISTICS: int-prop
Gecode::Int::Sequence::Violations::init
void init(Space &home, unsigned int n)
Initialize violation set for n violations.
Definition violations.hpp:64
Gecode::Int::Sequence::Violations::update
void update(Space &home, Violations &v)
Update violation set during cloning.
Definition violations.hpp:76
Gecode::Int::Sequence::Violations::add
void add(unsigned int i)
Add i to violation set.
Definition violations.hpp:82
Gecode::Int::Sequence::Violations::Violations
Violations(void)
Default constructor.
Definition violations.hpp:61
Gecode::Int::Sequence::Violations::fst
unsigned int fst
The (possibly) first set bit (set is empty if fst == sz).
Definition violations.hpp:43
Gecode::Int::Sequence::Violations::empty
bool empty(void) const
Return whether set is empty.
Definition violations.hpp:70
Gecode::Int::Sequence::Violations::get
unsigned int get(void)
Get first element from violation set and remove it.
Definition violations.hpp:87
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Support::BitSetBase
Basic bitset support.
Definition bitset-base.hpp:190
Gecode::Support::BitSetBase::init
void init(A &a, unsigned int s, bool setbits=false)
Initialize for s bits and allocator a (only after default constructor).
Definition bitset-base.hpp:568
Gecode::Support::BitSetBase::get
bool get(unsigned int i) const
Access value at bit i.
Definition bitset-base.hpp:590
Gecode::Support::BitSetBase::size
unsigned int size(void) const
Return size of bitset (number of bits).
Definition bitset-base.hpp:585
Gecode::Support::BitSetBase::clear
void clear(unsigned int i)
Clear bit i.
Definition bitset-base.hpp:600
Gecode::Support::BitSetBase::set
void set(unsigned int i)
Set bit i.
Definition bitset-base.hpp:595
Gecode::Support::BitSetBase::next
unsigned int next(unsigned int i) const
Return position greater or equal i of next set bit (i is allowed to be equal to size).
Definition bitset-base.hpp:606
Gecode::Int::Sequence
Sequence propagators
Definition sequence.hh:40
Gecode::Int
Finite domain integers.
Gecode
Gecode toplevel namespace
forceinline
#define forceinline
Definition config.hpp:187