78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
/*
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* simplex.H
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* dees
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*
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* Created by Yann Esposito on 17/04/06.
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* Copyright 2006 __MyCompanyName__. All rights reserved.
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*
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*/
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#include "general.H" // pour l'utilisation des map, hash_map...
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#include "include/lp_lib.h"
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typedef enum _simplexMode {realNotBounded, realZeroBounded, ZeroOrOne} simplexMode;
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// this is a class used as a wrapper to other libraries
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class Simplex {
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private:
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int n; // number of constraints
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lprec *lp; // the linear programming variable (LP_SOLVE)
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double *tmpbuf; // temporary buffer used to fill the problem
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int tmpbufsize; // size of tmpbuf
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double val; // temporary value for equations
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void resize_tmpbuf(void); // update the size of tmpbuf
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public:
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Simplex(void) {
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lp = NULL;
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tmpbuf = NULL;
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tmpbufsize=0;
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n = 0;
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val=0;
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}
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~Simplex(void) {
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if (lp != NULL)
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free_lp(&lp);
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if (tmpbuf != NULL)
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free(tmpbuf);
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}
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// print the linear system
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inline void affiche(void) { print_lp(lp); }
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// set the mode for the variables ({0,1}, or Q+ or Q)
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int set_mode(const simplexMode newMode);
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// set the nuber of constraints
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inline lprec *set_number_of_unknown_to(const int newNumber) {
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if (lp != NULL)
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free(lp);
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n = newNumber;
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lp=make_lp(0,n);
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if (lp)
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set_verbose(lp,0);
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return (lp);
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}
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int setval(double newval);
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int setparam(int variable, double val);
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int add_absolute_constraint(); // use the current values setted by setval and setparam
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int add_equality_constraint();
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int add_equality_constraint_with_parameters(double *constraints, double val);
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// add a constraint of the form :
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// | constraints[0]X0 + ... + constraints[n-1]Xn-1 - val| <= epsilon
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int add_absolute_constraint_with_parameters(double *constraints, double val);
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int add_absolute_constraint_with_parameters(const vector<double> constraints, double val);
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int add_absolute_constraint_with_parameters(const map<int,double> constraints, double val);
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// return the solution int the map solution
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bool has_solution(map<int,float> &solution, float &epsilon);
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// renvoie 0 si
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int set_minimize_epsilon_mode (double epsilon = -1);
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};
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