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Removing old source files
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BlackLight
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2 changed files with 0 additions and 482 deletions
276
csp++.cpp
276
csp++.cpp
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/*
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* =====================================================================================
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*
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* Filename: csp++.cpp
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*
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* Description:
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*
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* Version: 1.0
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* Created: 17/05/2010 09:17:13
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* Revision: none
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* Compiler: gcc
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*
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* Author: BlackLight (http://0x00.ath.cx), <blacklight@autistici.org>
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* Company: lulz
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*
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* =====================================================================================
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*/
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#include <iostream>
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#include <algorithm>
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#include "csp++.h"
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using namespace std;
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// using std::vector;
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template<class T>
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void
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CSP<T>::__init (int n, bool (*c)(vector< CSPvariable<T> >))
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{
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variables = vector< CSPvariable<T> >(n);
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fixed = vector<bool>(n);
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__default_domains = vector< vector<T> >(n);
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for (size_t i=0; i < variables.size(); i++) {
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variables[i].index = i;
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variables[i].fixed = false;
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// TODO Remove this line
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fixed[i] = false;
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}
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constraints = vector< bool (*)(std::vector< CSPvariable<T> >) >(1);
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constraint = c;
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__has_default_value = false;
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}
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template<class T>
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CSP<T>::CSP (int n, bool (*c)(vector< CSPvariable<T> >))
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{
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__init (n, c);
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}
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template<class T>
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CSP<T>::CSP ( int n, T default_value, bool set_value, bool (*c)(std::vector< CSPvariable<T> >) )
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{
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__init (n, c);
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for ( size_t i=0; i < variables.size(); i++ ) {
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variables[i].value = default_value;
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variables[i].fixed = set_value;
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// TODO Remove this line
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fixed[i] = set_value;
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}
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__default_value = default_value;
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__has_default_value = true;
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}
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template<class T>
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void
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CSP<T>::setDomain (size_t index, vector<T> domain)
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{
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if (index >= variables.size())
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throw CSPexception("Index out of range");
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variables[index].domain = domain;
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__default_domains[index] = domain;
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}
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template<class T>
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void
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CSP<T>::setDomain (size_t index, T domain[], int size)
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{
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if (index >= variables.size())
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throw CSPexception("Index out of range");
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if (size < 0)
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throw CSPexception("Invalid domain size");
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variables[index].domain = vector<T>(size);
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for (int i=0; i < size; i++) {
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variables[index].domain[i] = domain[i];
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__default_domains[index].push_back(domain[i]);
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}
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}
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template<class T>
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void
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CSP<T>::setConstraint ( bool (*c)(vector< CSPvariable<T> >))
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{
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constraints = vector< bool(*)(vector< CSPvariable<T > >) >(1);
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constraint = c;
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}
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template<class T>
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void
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CSP<T>::setConstraint ( std::vector< bool(*)(std::vector< CSPvariable<T> >) > c )
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{
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constraints = c;
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}
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template<class T>
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void
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CSP<T>::appendConstraint ( bool (*c)(vector< CSPvariable<T> >))
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{
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constraints.push_back(c);
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}
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template<class T>
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void
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CSP<T>::dropConstraint ( size_t index )
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{
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if (index >= constraints.size())
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throw CSPexception("Index out of range");
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constraints.erase( constraints.begin() + index );
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}
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template<class T>
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void
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CSP<T>::restoreDomains ( void )
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{
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for (int i=0; i < variables.size(); i++)
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variables[i].domain = __default_domains[i];
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}
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template<class T>
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void
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CSP<T>::refreshDomains ( void )
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{
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vector< arc<T> > arcs;
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restoreDomains();
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for (typename vector< CSPvariable<T> >::iterator x = variables.begin(); x != variables.end(); x++) {
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for (typename vector< CSPvariable<T> >::iterator y = variables.begin(); y != variables.end(); y++) {
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for (size_t i=0; i < x->domain.size(); i++) {
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if ( x->fixed ) {
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// TODO Remove this line
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// if ( fixed[ x - variables.begin() ] ) {
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if ( x->domain[i] != x->value )
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continue;
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}
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x->value = x->domain[i];
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for (size_t j=0; j < y->domain.size(); j++) {
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if ( y->fixed ) {
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// TODO Remove this line
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// if ( fixed[ y - variables.begin() ] ) {
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if ( y->domain[j] != y->value )
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continue;
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}
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y->value = y->domain[j];
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bool isConfigurationValid = true;
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for ( typename std::vector< bool (*)(std::vector< CSPvariable<T> >) >::iterator c = constraints.begin();
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c != constraints.end() && isConfigurationValid;
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c++ ) {
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if (!(*c)(variables))
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isConfigurationValid = false;
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}
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if (isConfigurationValid) {
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arc<T> a;
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a.var[0] = *x; a.var[1] = *y;
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a.value[0] = x->value; a.value[1] = y->value;
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arcs.push_back(a);
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}
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}
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}
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}
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vector<T> domain = vector<T>();
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for (size_t i=0; i < arcs.size(); i++) {
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if (arcs[i].var[0].index == x->index ||
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arcs[i].var[1].index == x->index) {
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T value = (arcs[i].var[0].index == x->index) ? arcs[i].value[0] : arcs[i].value[1];
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bool found = false;
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for (size_t j=0; j < domain.size() && !found; j++) {
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if (domain[j] == value)
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found = true;
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}
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if (!found) {
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domain.push_back(value);
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}
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}
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}
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sort(domain.begin(), domain.end());
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x->domain = domain;
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}
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}
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template<class T>
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std::vector<T>
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CSP<T>::getDomain ( size_t index )
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{
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if (index >= variables.size())
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throw CSPexception("Index out of range");
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return variables[index].domain;
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}
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template<class T>
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size_t
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CSP<T>::getSize( void )
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{
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return variables.size();
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}
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template<class T>
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void
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CSP<T>::setValue ( size_t index, T value )
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{
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if (index >= variables.size())
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throw CSPexception("Index out of range");
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variables[index].value = value;
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variables[index].fixed = true;
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// TODO Remove this line
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// fixed[index] = true;
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}
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template<class T>
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void
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CSP<T>::unsetValue ( size_t index )
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{
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if (index >= variables.size())
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throw CSPexception("Index out of range");
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if (__has_default_value)
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variables[index].value = __default_value;
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variables[index].fixed = false;
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// TODO Remove this line
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// fixed[index] = false;
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}
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template<class T>
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bool
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CSP<T>::isSatisfiable ( void )
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{
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for ( size_t i=0; i < variables.size(); i++ ) {
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if ( variables[i].domain.empty() )
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return false;
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}
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return true;
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}
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template<class T>
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bool
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CSP<T>::hasUniqueSolution ( void )
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{
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for ( size_t i=0; i < variables.size(); i++ ) {
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if (variables[i].domain.size() != 1)
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return false;
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}
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return true;
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}
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206
csp++.h
206
csp++.h
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@ -1,206 +0,0 @@
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/*
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* =====================================================================================
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*
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* Filename: csp++.h
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*
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* Description:
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*
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* Version: 1.0
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* Created: 16/05/2010 23:16:42
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* Revision: none
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* Compiler: gcc
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*
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* Author: BlackLight (http://0x00.ath.cx), <blacklight@autistici.org>
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* Company: lulz
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*
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* =====================================================================================
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*/
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#ifndef __CSPPP_H
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#define __CSPPP_H
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#include <vector>
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#include <exception>
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template<class T>
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struct CSPvariable {
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int index;
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bool fixed;
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T value;
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std::vector<T> domain;
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};
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/**
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* \class CSPexception csp++.h
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* \brief Class for managing exception in CSP
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*/
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class CSPexception : public std::exception {
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const char* message;
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public:
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CSPexception (const char *m) {
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message = m;
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}
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virtual const char* what() {
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return message;
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}
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};
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/**
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* \class CSP csp++.h
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* \brief Main class for managing a CSP
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*/
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template<class T>
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class CSP {
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private:
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template<class TT>
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struct arc {
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CSPvariable<TT> var[2];
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TT value[2];
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};
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std::vector<bool> fixed;
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std::vector< CSPvariable<T> > variables;
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std::vector< bool (*)(std::vector< CSPvariable<T> >) > constraints;
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#define constraint constraints[0]
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std::vector< std::vector<T> > __default_domains;
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T __default_value;
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bool __has_default_value;
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static bool __default_constraint ( std::vector< CSPvariable<T> > v ) { return true; }
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void __init ( int n, bool (*c)(std::vector< CSPvariable<T> >) );
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void restoreDomains ( void );
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public:
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/**
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* \brief Class constructor
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* \param n Number of variables in the CSP
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* \param c Boolean function representing the constraint of the CSP
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* If no constraint function is set in the constructor or
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* using the applyConstraint() method, a default function
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* always returning true will be used, that allows any
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* domain for any variable to be valid (no constraint)
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*/
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CSP ( int n, bool (*c)(std::vector< CSPvariable<T> >) = __default_constraint );
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/**
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* \brief Class constructor
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* \param n Number of variables in the CSP
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* \param default_value Default value for the variables in the CSP
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* when initialized
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* \param set_variables Decide whether mark the variables set with
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* default_value as "set" or "not set" (default: not set)
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* \param c Boolean function representing the constraint of the CSP
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* If no constraint function is set in the constructor or
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* using the applyConstraint() method, a default function
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* always returning true will be used, that allows any
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* domain for any variable to be valid (no constraint)
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*/
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CSP ( int n, T default_value, bool set_variables = false, bool (*c)(std::vector< CSPvariable<T> >) = __default_constraint );
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/**
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* METHOD: setDomain
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* \brief Set the domain for the i-th variable
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* \param index Variable for which we're setting the domain
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* \param domain Vector containing the possible values for that variable
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*/
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void setDomain ( size_t index, std::vector<T> domain );
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/**
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* METHOD: setDomain
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* \brief Set the domain for the i-th variable
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* \param index Variable for which we're setting the domain
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* \param domain Array containing the possible values for that variable
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* \param size Size of "domain" array
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*/
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void setDomain ( size_t index, T domain[], int size );
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/**
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* METHOD: setConstraint
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* \brief Apply the constraint to the CSP as a boolean function
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* \param c Boolean function representing the constraint of the CSP
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*/
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void setConstraint ( bool (*c)(std::vector< CSPvariable<T> >) );
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/**
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* METHOD: setConstraint
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* \brief Apply the constraints to the CSP as vector of boolean functions
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* \param c Vector containing pointers to boolean functions representing
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* the constraints of the CSP
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*/
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void setConstraint ( std::vector< bool(*)(std::vector< CSPvariable<T> >) > c );
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/**
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* METHOD: dropConstraint
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* \brief Drops a constraint from the CSP
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* \param index Index of the constraint to be dropped
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*/
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void dropConstraint ( size_t index );
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/**
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* METHOD: appendConstraint
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* \brief Append a constraint to the list of the constraint of the CSP
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* \param c A function pointer returning a boolean value representing the new constraint
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*/
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void appendConstraint ( bool (*c)(std::vector< CSPvariable<T> >) );
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/**
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* METHOD: refreshDomains
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* \brief Updates the domains of the variables. Any constraint or node fixed value is applied
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*/
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void refreshDomains( void );
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/**
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* METHOD: getDomain
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* \brief Get the domain of the i-th variable
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* \param index Variable for which we're going to get the domain
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* \return The domain of the i-th variable as a vector of T
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*/
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std::vector<T> getDomain ( size_t index );
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/**
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* METHOD: getSize
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* \brief Get the number of variables in the current CSP
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* \return Size of the CSP
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*/
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size_t getSize ( void );
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/**
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* METHOD: setValue
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* \brief Set the value of a variable as a constraint
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* \param index Index of the parameter to be set
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* \param value Value to be set
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*/
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void setValue ( size_t index, T value );
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/**
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* METHOD: unsetValue
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* \brief Marks a variable as not set, and if a default value was assigned
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* in the CSP constructor, this value will be set. By default, unless
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* specified in the constructor, all the variables are considered as
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* not set
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* \param index Index of the variable to be unset
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*/
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void unsetValue ( size_t index );
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/**
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* METHOD: isSatisfiable
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* \brief Check if the current CSP, with the applied constraints, is satisfiable
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* \return true if the CSP has at least a possible solution, false otherwise
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*/
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bool isSatisfiable ( void );
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/**
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* METHOD: hasUniqueSolution
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* \brief Check if the CSP, with the given variables, domains and constraints,
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* admits a unique solution, i.e. each domain of each variable contains
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* an only element
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* \return true if the CSP has an only possible solution, false otherwise
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*/
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bool hasUniqueSolution ( void );
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};
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#endif
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