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Add moBitsNeighbor* which change several bits in a bitsring

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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@2074 331e1502-861f-0410-8da2-ba01fb791d7f
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verel 2011-01-26 09:11:30 +00:00
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trunk/paradiseo-mo/src/problems/bitString/moBitsNeighbor.h Normal file
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/*
<moBitsNeighbor.h>
Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010
Sebastien Verel, Arnaud Liefooghe, Jeremie Humeau
This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software. You can use,
modify and/ or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".
As a counterpart to the access to the source code and rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty and the software's author, the holder of the
economic rights, and the successive licensors have only limited liability.
In this respect, the user's attention is drawn to the risks associated
with loading, using, modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean that it is complicated to manipulate, and that also
therefore means that it is reserved for developers and experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and, more generally, to use and operate it in the
same conditions as regards security.
The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms.
ParadisEO WebSite : http://paradiseo.gforge.inria.fr
Contact: paradiseo-help@lists.gforge.inria.fr
*/
#ifndef _moBitsNeighbor_h
#define _moBitsNeighbor_h
#include <neighborhood/moNeighbor.h>
/**
* Neighbor to flip several bits
* of a solution of type eoBit
*/
template< class EOT, class Fitness=typename EOT::Fitness >
class moBitsNeighbor : virtual public moNeighbor<EOT, Fitness>, public moBackableNeighbor<EOT>
{
public:
// position of bits which are flipped
vector<unsigned int> bits;
// number of bits to flip
unsigned int nBits;
/**
* Default Constructor
*/
moBitsNeighbor() : moNeighbor<EOT, Fitness>() {}
/**
* Copy Constructor
* @param _n the neighbor to copy
*/
moBitsNeighbor(const moBitsNeighbor& _source) : moNeighbor<EOT, Fitness>(_source) {
bits.resize(_source.bits.size());
nBits = _source.nBits;
for(unsigned i = 0; i < bits.size(); i++)
this->bits[i] = _source.bits[i] ;
}
/**
* Assignment operator
* @param _source the source neighbor
*/
moBitsNeighbor<EOT, Fitness> & operator=(const moBitsNeighbor<EOT, Fitness> & _source) {
moNeighbor<EOT, Fitness>::operator=(_source);
if (bits.size() != _source.bits.size())
bits.resize(_source.bits.size());
nBits = _source.nBits;
for(unsigned i = 0; i < bits.size(); i++)
this->bits[i] = _source.bits[i] ;
return *this ;
}
/**
* Return the class Name
* @return the class name as a std::string
*/
virtual std::string className() const {
return "moBitsNeighbor";
}
/**
* flipped the bits according to the bits vector
* @param _solution the solution to move
*/
virtual void move(EOT& _solution) {
for(unsigned i = 0; i < nBits; i++)
_solution[ this->bits[i] ] = !_solution[ this->bits[i] ];
}
/**
* flipped the bits according to the bits vector
* @param _solution the solution to move back
*/
virtual void moveBack(EOT& _solution) {
for(unsigned i = 0; i < nBits; i++)
_solution[ this->bits[i] ] = !_solution[ this->bits[i] ];
}
/**
* @param _neighbor a neighbor
* @return if _neighbor and this one are equals
*/
virtual bool equals(moBitsNeighbor<EOT>& _neighbor) {
if (nBits != _neighbor.nBits)
return false;
else {
unsigned int i = 0;
while ((i < nBits) && (bits[i] == _neighbor.bits[i])) i++;
if (i < nBits)
return false;
else
return true;
}
}
};
#endif

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trunk/paradiseo-mo/src/problems/bitString/moBitsNeighborhood.h Normal file
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/*
<moBitsNeighborhood.h>
Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010
Sebastien Verel, Arnaud Liefooghe, Jeremie Humeau
This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software. You can use,
modify and/ or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".
As a counterpart to the access to the source code and rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty and the software's author, the holder of the
economic rights, and the successive licensors have only limited liability.
In this respect, the user's attention is drawn to the risks associated
with loading, using, modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean that it is complicated to manipulate, and that also
therefore means that it is reserved for developers and experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and, more generally, to use and operate it in the
same conditions as regards security.
The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms.
ParadisEO WebSite : http://paradiseo.gforge.inria.fr
Contact: paradiseo-help@lists.gforge.inria.fr
*/
#ifndef _moBitsNeighborhood_h
#define _moBitsNeighborhood_h
#include <neighborhood/moNeighborhood.h>
#include <utils/eoRNG.h>
/**
* A neighborhood for bit string solutions
* where several bits could be flipped
* in a given Hamming distance
*/
template< class Neighbor >
class moBitsNeighborhood : public moNeighborhood<Neighbor>
{
public:
/**
* Define type of a solution corresponding to Neighbor
*/
typedef typename Neighbor::EOT EOT;
/**
* Constructor
* @param _length bit string length
* @param _nBits maximum number of bits to flip (radius of the neighborhood)
*/
moBitsNeighborhood(unsigned _length, unsigned _nBits): moNeighborhood<Neighbor>(), length(_length), nBits(_nBits) {
int j;
bool last;
neighborhoodSize = 0;
for(int d = 1; d <= nBits; d++) {
vector<unsigned int> bits(d);
// the first one for this Hamming distance
for(unsigned i = 0; i < d; i++)
bits[i] = i;
neighborsVec.push_back(bits);
/*
std::cout << "first --" << std::endl;
for(unsigned i = 0; i < d; i++)
std::cout << bits[i] ;
std::cout << std::endl;
*/
// the others ones
last = false;
while(!last) {
j = d - 1;
if (bits[j] < length - 1) {
bits[j]++;
neighborsVec.push_back(bits);
} else {
j--;
while ( (j >= 0) && (bits[j] + 1 == bits[j+1]) )
j--;
if (j < 0) {
last = true;
} else {
bits[j]++;
for(unsigned i = j+1; i < d; i++)
bits[i] = bits[i-1] + 1;
neighborsVec.push_back(bits);
}
}
/*
std::cout << "fin de while" << std::endl;
for(unsigned i = 0; i < d; i++)
std::cout << bits[i] << " ";
std::cout << std::endl;
*/
}
}
neighborhoodSize = neighborsVec.size();
}
/**
* Test if it exist a neighbor
* @param _solution the solution to explore
* @return true if the neighborhood was not empty: the population size is at least 1
*/
virtual bool hasNeighbor(EOT& _solution) {
return _solution.size() > 0;
}
/**
* Initialization of the neighborhood:
* apply several bit flips on the solution
* @param _solution the solution to explore
* @param _neighbor the first neighbor
*/
virtual void init(EOT & _solution, Neighbor & _neighbor) {
key = 0;
_neighbor.bits.resize(nBits);
setNeighbor(0, _neighbor);
}
/**
* Give the next neighbor
* apply several bit flips on the solution
* @param _solution the solution to explore (population of solutions)
* @param _neighbor the next neighbor which in order of distance
*/
virtual void next(EOT & _solution, Neighbor & _neighbor) {
key++;
setNeighbor(key, _neighbor);
}
/**
* Test if all neighbors are explored or not,if false, there is no neighbor left to explore
* @param _solution the solution to explore
* @return true if there is again a neighbor to explore: population size larger or equals than 1
*/
virtual bool cont(EOT & _solution) {
return key < neighborhoodSize - 1;
}
/**
* Return the class Name
* @return the class name as a std::string
*/
virtual std::string className() const {
return "moBitsNeighborhood";
}
unsigned int index() {
return key;
}
protected:
// length of the bit strings
unsigned int length;
// radius of the neighborhood
unsigned int nBits;
// size of the neighborhood
unsigned int neighborhoodSize;
// list of neighbors
vector< vector<unsigned int> > neighborsVec;
// key of the neighbor which is currently explored
unsigned int key;
/**
* Set the neighbor to the correct neighbor
* @param _key index in neighborVec of the neighbor to set
* @param _neighbor neighbor to set
*/
virtual void setNeighbor(unsigned _key, Neighbor & _neighbor) {
_neighbor.nBits = neighborsVec[_key].size();
for(unsigned i = 0; i < _neighbor.nBits; i++)
_neighbor.bits[i] = neighborsVec[_key][i];
}
};
#endif