marci@1031: // -*- c++ -*-
marci@1031: #ifndef LEMON_LP_SOLVER_WRAPPER_H
marci@1031: #define LEMON_LP_SOLVER_WRAPPER_H
marci@1031: 
marci@1031: ///\ingroup misc
marci@1031: ///\file
marci@1031: ///\brief Dijkstra algorithm.
marci@1031: 
marci@1031: // #include <stdio.h>
marci@1031: #include <stdlib.h>
marci@1097: #include <iostream>
marci@1097: #include <map>
marci@1031: // #include <stdio>
marci@1031: //#include <stdlib>
marci@1031: extern "C" {
marci@1031: #include "glpk.h"
marci@1031: }
marci@1031: 
marci@1031: #include <iostream>
marci@1031: #include <vector>
marci@1031: #include <string>
marci@1031: #include <list>
marci@1031: #include <memory>
marci@1031: #include <utility>
marci@1031: 
marci@1031: //#include <sage_graph.h>
marci@1031: //#include <lemon/list_graph.h>
marci@1031: //#include <lemon/graph_wrapper.h>
marci@1031: #include <lemon/invalid.h>
marci@1031: //#include <bfs_dfs.h>
marci@1031: //#include <stp.h>
marci@1031: //#include <lemon/max_flow.h>
marci@1031: //#include <augmenting_flow.h>
marci@1031: //#include <iter_map.h>
marci@1031: 
marci@1031: using std::cout;
marci@1031: using std::cin;
marci@1031: using std::endl;
marci@1031: 
marci@1031: namespace lemon {
marci@1031:   
marci@1031:   /// \addtogroup misc
marci@1031:   /// @{
marci@1031: 
marci@1031:   /// \brief A partitioned vector with iterable classes.
marci@1031:   ///
marci@1031:   /// This class implements a container in which the data is stored in an 
marci@1031:   /// stl vector, the range is partitioned into sets and each set is 
marci@1031:   /// doubly linked in a list. 
marci@1031:   /// That is, each class is iterable by lemon iterators, and any member of 
marci@1031:   /// the vector can bo moved to an other class.
marci@1031:   template <typename T>
marci@1031:   class IterablePartition {
marci@1031:   protected:
marci@1031:     struct Node {
marci@1031:       T data;
marci@1031:       int prev; //invalid az -1
marci@1031:       int next; 
marci@1031:     };
marci@1031:     std::vector<Node> nodes;
marci@1031:     struct Tip {
marci@1031:       int first;
marci@1031:       int last;
marci@1031:     };
marci@1031:     std::vector<Tip> tips;
marci@1031:   public:
marci@1031:     /// The classes are indexed by integers from \c 0 to \c classNum()-1.
marci@1031:     int classNum() const { return tips.size(); }
marci@1031:     /// This lemon style iterator iterates through a class. 
marci@1031:     class ClassIt;
marci@1031:     /// Constructor. The number of classes is to be given which is fixed 
marci@1031:     /// over the life of the container. 
marci@1031:     /// The partition classes are indexed from 0 to class_num-1. 
marci@1031:     IterablePartition(int class_num) { 
marci@1031:       for (int i=0; i<class_num; ++i) {
marci@1031: 	Tip t;
marci@1031: 	t.first=t.last=-1;
marci@1031: 	tips.push_back(t);
marci@1031:       }
marci@1031:     }
marci@1031:   protected:
marci@1031:     void befuz(ClassIt it, int class_id) {
marci@1031:       if (tips[class_id].first==-1) {
marci@1031: 	if (tips[class_id].last==-1) {
marci@1031: 	  nodes[it.i].prev=nodes[it.i].next=-1;
marci@1031: 	  tips[class_id].first=tips[class_id].last=it.i;
marci@1031: 	}
marci@1031:       } else {
marci@1031: 	nodes[it.i].prev=tips[class_id].last;
marci@1031: 	nodes[it.i].next=-1;
marci@1031: 	nodes[tips[class_id].last].next=it.i;
marci@1031: 	tips[class_id].last=it.i;
marci@1031:       }
marci@1031:     }
marci@1031:     void kifuz(ClassIt it, int class_id) {
marci@1031:       if (tips[class_id].first==it.i) {
marci@1031: 	if (tips[class_id].last==it.i) {
marci@1031: 	  tips[class_id].first=tips[class_id].last=-1;
marci@1031: 	} else {
marci@1031: 	  tips[class_id].first=nodes[it.i].next;
marci@1031: 	  nodes[nodes[it.i].next].prev=-1;
marci@1031: 	}
marci@1031:       } else {
marci@1031: 	if (tips[class_id].last==it.i) {
marci@1031: 	  tips[class_id].last=nodes[it.i].prev;
marci@1031: 	  nodes[nodes[it.i].prev].next=-1;
marci@1031: 	} else {
marci@1031: 	  nodes[nodes[it.i].next].prev=nodes[it.i].prev;
marci@1031: 	  nodes[nodes[it.i].prev].next=nodes[it.i].next;
marci@1031: 	}
marci@1031:       }
marci@1031:     }
marci@1031:   public:
marci@1031:     /// A new element with data \c t is pushed into the vector and into class 
marci@1031:     /// \c class_id.
marci@1031:     ClassIt push_back(const T& t, int class_id) { 
marci@1031:       Node n;
marci@1031:       n.data=t;
marci@1031:       nodes.push_back(n);
marci@1031:       int i=nodes.size()-1;
marci@1031:       befuz(i, class_id);
marci@1031:       return i;
marci@1031:     }
marci@1031:     /// A member is moved to an other class.
marci@1031:     void set(ClassIt it, int old_class_id, int new_class_id) {
marci@1031:       kifuz(it.i, old_class_id);
marci@1031:       befuz(it.i, new_class_id);
marci@1031:     }
marci@1031:     /// Returns the data pointed by \c it.
marci@1031:     T& operator[](ClassIt it) { return nodes[it.i].data; }
marci@1031:     /// Returns the data pointed by \c it.
marci@1031:     const T& operator[](ClassIt it) const { return nodes[it.i].data; }
marci@1031:     ///.
marci@1031:     class ClassIt {
marci@1031:       friend class IterablePartition;
marci@1031:     protected:
marci@1031:       int i;
marci@1031:     public:
marci@1031:       /// Default constructor.
marci@1031:       ClassIt() { }
marci@1031:       /// This constructor constructs an iterator which points
marci@1031:       /// to the member of th container indexed by the integer _i.
marci@1031:       ClassIt(const int& _i) : i(_i) { }
marci@1031:       /// Invalid constructor.
marci@1031:       ClassIt(const Invalid&) : i(-1) { }
marci@1031:     };
marci@1031:     /// First member of class \c class_id.
marci@1031:     ClassIt& first(ClassIt& it, int class_id) const {
marci@1031:       it.i=tips[class_id].first;
marci@1031:       return it;
marci@1031:     }
marci@1031:     /// Next member.
marci@1031:     ClassIt& next(ClassIt& it) const {
marci@1031:       it.i=nodes[it.i].next;
marci@1031:       return it;
marci@1031:     }
marci@1031:     /// True iff the iterator is valid.
marci@1031:     bool valid(const ClassIt& it) const { return it.i!=-1; }
marci@1031:   };
marci@1031: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   class Expr;
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   class SmallExpr {
marci@1097:     template <typename _C, typename _V> 
marci@1097:     friend class Expr;
marci@1097:   protected:
marci@1097:     _Col col;
marci@1097:     _Value value;
marci@1097:   public:
marci@1097:     SmallExpr(_Col _col) : col(_col), value(1) { 
marci@1097:     }
marci@1097:     SmallExpr& operator *= (_Value _value) {
marci@1097:       value*=_value;
marci@1097:       return *this;
marci@1097:     }
marci@1097:     //    template <typename _C, typename _V>
marci@1097:     //    friend SmallExpr<_C, _V> operator* (_V _value, 
marci@1097:     //					const SmallExpr<_C, _V>& expr);
marci@1097:     template <typename _C, typename _V>
marci@1097:     friend std::ostream& operator<<(std::ostream& os, 
marci@1097: 				    const SmallExpr<_C, _V>& expr);
marci@1097:   };
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   SmallExpr<_Col, _Value> 
marci@1097:   operator* (_Value value, 
marci@1097: 	     const SmallExpr<_Col, _Value>& expr) {
marci@1097:     SmallExpr<_Col, _Value> tmp;
marci@1097:     tmp=expr;
marci@1097:     tmp*=value;
marci@1097:     return tmp;
marci@1097:   }
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   std::ostream& operator<<(std::ostream& os, 
marci@1097: 			   const SmallExpr<_Col, _Value>& expr) {
marci@1097:     os << expr.value << "*" << expr.col;
marci@1097:     return os;
marci@1097:   }
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   class Expr {
marci@1097:   protected:
marci@1097:     typedef 
marci@1097:     typename std::map<_Col, _Value> Data; 
marci@1097:     Data data;
marci@1097:   public:
marci@1097:     Expr() { }
marci@1097:     Expr(SmallExpr<_Col, _Value> expr) { 
marci@1097:       data.insert(std::make_pair(expr.col, expr.value));
marci@1097:     }
marci@1097: //     Expr(_Col col) { 
marci@1097: //       data.insert(std::make_pair(col, 1));
marci@1097: //     }
marci@1097:     Expr& operator*=(_Value _value) {
marci@1097:       for (typename Data::iterator i=data.begin(); 
marci@1097: 	   i!=data.end(); ++i) {
marci@1097: 	(*i).second *= _value;
marci@1097:       }
marci@1097:       return *this;
marci@1097:     }
marci@1097:     Expr& operator+=(SmallExpr<_Col, _Value> expr) {
marci@1097:       typename Data::iterator i=data.find(expr.col);
marci@1097:       if (i==data.end()) {
marci@1097: 	data.insert(std::make_pair(expr.col, expr.value));
marci@1097:       } else {
marci@1097: 	(*i).second+=expr.value;
marci@1097:       }
marci@1097:       return *this;
marci@1097:     }
marci@1097:     //    template <typename _C, typename _V> 
marci@1097:     //    friend Expr<_C, _V> operator*(_V _value, const Expr<_C, _V>& expr);
marci@1097:     template <typename _C, typename _V> 
marci@1097:     friend std::ostream& operator<<(std::ostream& os, 
marci@1097: 				    const Expr<_C, _V>& expr);
marci@1097:   };
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   Expr<_Col, _Value> operator*(_Value _value, 
marci@1097: 			       const Expr<_Col, _Value>& expr) {
marci@1097:     Expr<_Col, _Value> tmp;
marci@1097:     tmp=expr;
marci@1097:     tmp*=_value;
marci@1097:     return tmp;
marci@1097:   }
marci@1097: 
marci@1097:   template <typename _Col, typename _Value>
marci@1097:   std::ostream& operator<<(std::ostream& os, 
marci@1097: 			   const Expr<_Col, _Value>& expr) {
marci@1097:     for (typename Expr<_Col, _Value>::Data::const_iterator i=
marci@1097: 	   expr.data.begin(); 
marci@1097: 	 i!=expr.data.end(); ++i) {
marci@1097:       os << (*i).second << "*" << (*i).first << " ";
marci@1097:     }
marci@1097:     return os;
marci@1097:   }
marci@1097: 
marci@1031:   /*! \e
marci@1031:    */
marci@1048:   template <typename _Value>
marci@1031:   class LPSolverBase {
marci@1031:   public:
marci@1031:     /// \e
marci@1048:     typedef _Value Value;
marci@1048:     /// \e
marci@1031:     typedef IterablePartition<int>::ClassIt RowIt;
marci@1031:     /// \e
marci@1031:     typedef IterablePartition<int>::ClassIt ColIt;
marci@1074:   public:
marci@1031:     /// \e
marci@1031:     IterablePartition<int> row_iter_map;
marci@1031:     /// \e
marci@1031:     IterablePartition<int> col_iter_map;
marci@1031:     /// \e
marci@1074:     const int VALID_CLASS;
marci@1031:     /// \e
marci@1074:     const int INVALID_CLASS;
marci@1031:   public:
marci@1031:     /// \e
marci@1031:     LPSolverBase() : row_iter_map(2), 
marci@1031: 		     col_iter_map(2), 
marci@1074: 		     VALID_CLASS(0), INVALID_CLASS(1) { }
marci@1031:     /// \e
marci@1031:     virtual ~LPSolverBase() { }
marci@1081: 
marci@1081:     //MATRIX INDEPEDENT MANIPULATING FUNCTIONS
marci@1081: 
marci@1081:   public:
marci@1031:     /// \e
marci@1031:     virtual void setMinimize() = 0;
marci@1031:     /// \e
marci@1031:     virtual void setMaximize() = 0;
marci@1081: 
marci@1081:     //LOW LEVEL INTERFACE, MATRIX MANIPULATING FUNCTIONS
marci@1081: 
marci@1074:   protected:
marci@1031:     /// \e
marci@1074:     virtual int _addRow() = 0;
marci@1031:     /// \e
marci@1074:     virtual int _addCol() = 0;
marci@1081:     /// \e
marci@1081:     virtual void _setRowCoeffs(int i, 
marci@1081: 			       std::vector<std::pair<int, double> > coeffs) = 0;
marci@1081:     /// \e
marci@1081:     virtual void _setColCoeffs(int i, 
marci@1081: 			       std::vector<std::pair<int, double> > coeffs) = 0;
marci@1081:     /// \e
marci@1081:     virtual void _eraseCol(int i) = 0;
marci@1081:     /// \e
marci@1081:     virtual void _eraseRow(int i) = 0;
marci@1081:   public:
marci@1081:     /// \e
marci@1081:     enum Bound { FREE, LOWER, UPPER, DOUBLE, FIXED };
marci@1081:   protected:
marci@1081:     /// \e
marci@1081:     virtual void _setColBounds(int i, Bound bound, 
marci@1081: 			       _Value lo, _Value up) = 0; 
marci@1081:     /// \e
marci@1081:     virtual void _setRowBounds(int i, Bound bound, 
marci@1081: 			       _Value lo, _Value up) = 0; 
marci@1081:     /// \e
marci@1081:     virtual void _setObjCoef(int i, _Value obj_coef) = 0;
marci@1081:     /// \e
marci@1081:     virtual _Value _getObjCoef(int i) = 0;
marci@1081: 
marci@1081:     //LOW LEVEL, SOLUTION RETRIEVING FUNCTIONS
marci@1081: 
marci@1081:   protected:
marci@1081:     virtual _Value _getPrimal(int i) = 0;
marci@1081: 
marci@1081:     //HIGH LEVEL INTERFACE, MATRIX MANIPULATING FUNTIONS
marci@1081: 
marci@1074:   public:
marci@1074:     /// \e
marci@1074:     RowIt addRow() {
marci@1074:       int i=_addRow(); 
marci@1074:       RowIt row_it;
marci@1074:       row_iter_map.first(row_it, INVALID_CLASS);
marci@1074:       if (row_iter_map.valid(row_it)) { //van hasznalhato hely
marci@1074: 	row_iter_map.set(row_it, INVALID_CLASS, VALID_CLASS);
marci@1074: 	row_iter_map[row_it]=i;
marci@1074:       } else { //a cucc vegere kell inzertalni mert nincs szabad hely
marci@1074: 	row_it=row_iter_map.push_back(i, VALID_CLASS);
marci@1074:       }
marci@1074:       return row_it;
marci@1074:     }
marci@1074:     /// \e
marci@1074:     ColIt addCol() {
marci@1074:       int i=_addCol();  
marci@1074:       ColIt col_it;
marci@1074:       col_iter_map.first(col_it, INVALID_CLASS);
marci@1074:       if (col_iter_map.valid(col_it)) { //van hasznalhato hely
marci@1074: 	col_iter_map.set(col_it, INVALID_CLASS, VALID_CLASS);
marci@1074: 	col_iter_map[col_it]=i;
marci@1074:       } else { //a cucc vegere kell inzertalni mert nincs szabad hely
marci@1074: 	col_it=col_iter_map.push_back(i, VALID_CLASS);
marci@1074:       }
marci@1074:       return col_it;
marci@1074:     }
marci@1074:     /// \e
marci@1031:     template <typename Begin, typename End>
marci@1031:     void setRowCoeffs(RowIt row_it, Begin begin, End end) {
marci@1074:       std::vector<std::pair<int, double> > coeffs;
marci@1031:       for ( ; begin!=end; ++begin) {
marci@1074: 	coeffs.push_back(std::
marci@1074: 			 make_pair(col_iter_map[begin->first], begin->second));
marci@1031:       }
marci@1081:       _setRowCoeffs(row_iter_map[row_it], coeffs);
marci@1031:     }
marci@1031:     /// \e
marci@1031:     template <typename Begin, typename End>
marci@1031:     void setColCoeffs(ColIt col_it, Begin begin, End end) {
marci@1074:       std::vector<std::pair<int, double> > coeffs;
marci@1031:       for ( ; begin!=end; ++begin) {
marci@1074: 	coeffs.push_back(std::
marci@1074: 			 make_pair(row_iter_map[begin->first], begin->second));
marci@1031:       }
marci@1081:       _setColCoeffs(col_iter_map[col_it], coeffs);
marci@1074:     }
marci@1074:     /// \e
marci@1074:     void eraseCol(const ColIt& col_it) {
marci@1074:       col_iter_map.set(col_it, VALID_CLASS, INVALID_CLASS);
marci@1074:       int cols[2];
marci@1074:       cols[1]=col_iter_map[col_it];
marci@1074:       _eraseCol(cols[1]);
marci@1074:       col_iter_map[col_it]=0; //glpk specifikus, de kell ez??
marci@1074:       ColIt it;
marci@1074:       for (col_iter_map.first(it, VALID_CLASS); 
marci@1074: 	   col_iter_map.valid(it); col_iter_map.next(it)) {
marci@1074: 	if (col_iter_map[it]>cols[1]) --col_iter_map[it];
marci@1074:       }
marci@1031:     }
marci@1031:     /// \e
marci@1074:     void eraseRow(const RowIt& row_it) {
marci@1074:       row_iter_map.set(row_it, VALID_CLASS, INVALID_CLASS);
marci@1074:       int rows[2];
marci@1074:       rows[1]=row_iter_map[row_it];
marci@1074:       _eraseRow(rows[1]);
marci@1074:       row_iter_map[row_it]=0; //glpk specifikus, de kell ez??
marci@1074:       RowIt it;
marci@1074:       for (row_iter_map.first(it, VALID_CLASS); 
marci@1074: 	   row_iter_map.valid(it); row_iter_map.next(it)) {
marci@1074: 	if (row_iter_map[it]>rows[1]) --row_iter_map[it];
marci@1074:       }
marci@1074:     }
marci@1031:     /// \e
marci@1081:     void setColBounds(const ColIt& col_it, Bound bound, 
marci@1081: 		      _Value lo, _Value up) {
marci@1081:       _setColBounds(col_iter_map[col_it], bound, lo, up);
marci@1081:     }
marci@1031:     /// \e
marci@1081:     void setRowBounds(const RowIt& row_it, Bound bound, 
marci@1081: 		      _Value lo, _Value up) {
marci@1081:       _setRowBounds(row_iter_map[row_it], bound, lo, up);
marci@1081:     }
marci@1031:     /// \e
marci@1081:     void setObjCoef(const ColIt& col_it, _Value obj_coef) {
marci@1081:       _setObjCoef(col_iter_map[col_it], obj_coef);
marci@1081:     }
marci@1031:     /// \e
marci@1081:     _Value getObjCoef(const ColIt& col_it) {
marci@1081:       return _getObjCoef(col_iter_map[col_it]);
marci@1081:     }
marci@1081: 
marci@1081:     //SOLVER FUNCTIONS
marci@1081: 
marci@1031:     /// \e
marci@1031:     virtual void solveSimplex() = 0;
marci@1031:     /// \e
marci@1031:     virtual void solvePrimalSimplex() = 0;
marci@1031:     /// \e
marci@1031:     virtual void solveDualSimplex() = 0;
marci@1031:     /// \e
marci@1081: 
marci@1081:     //HIGH LEVEL, SOLUTION RETRIEVING FUNCTIONS
marci@1081: 
marci@1081:   public:
marci@1081:     _Value getPrimal(const ColIt& col_it) {
marci@1081:       return _getPrimal(col_iter_map[col_it]);
marci@1081:     }
marci@1031:     /// \e
marci@1048:     virtual _Value getObjVal() = 0;
marci@1081: 
marci@1081:     //OTHER FUNCTIONS
marci@1081: 
marci@1031:     /// \e
marci@1031:     virtual int rowNum() const = 0;
marci@1031:     /// \e
marci@1031:     virtual int colNum() const = 0;
marci@1031:     /// \e
marci@1031:     virtual int warmUp() = 0;
marci@1031:     /// \e
marci@1031:     virtual void printWarmUpStatus(int i) = 0;
marci@1031:     /// \e
marci@1031:     virtual int getPrimalStatus() = 0;
marci@1031:     /// \e
marci@1031:     virtual void printPrimalStatus(int i) = 0;
marci@1031:     /// \e
marci@1031:     virtual int getDualStatus() = 0;
marci@1031:     /// \e
marci@1031:     virtual void printDualStatus(int i) = 0;
marci@1031:     /// Returns the status of the slack variable assigned to row \c row_it.
marci@1031:     virtual int getRowStat(const RowIt& row_it) = 0;
marci@1031:     /// \e
marci@1031:     virtual void printRowStatus(int i) = 0;
marci@1031:     /// Returns the status of the variable assigned to column \c col_it.
marci@1031:     virtual int getColStat(const ColIt& col_it) = 0;
marci@1031:     /// \e
marci@1031:     virtual void printColStatus(int i) = 0;
marci@1031:   };
marci@1031:   
marci@1048: 
marci@1031:   /// \brief Wrappers for LP solvers
marci@1031:   /// 
marci@1031:   /// This class implements a lemon wrapper for glpk.
marci@1031:   /// Later other LP-solvers will be wrapped into lemon.
marci@1031:   /// The aim of this class is to give a general surface to different 
marci@1031:   /// solvers, i.e. it makes possible to write algorithms using LP's, 
marci@1031:   /// in which the solver can be changed to an other one easily.
marci@1081:   class LPGLPK : public LPSolverBase<double> {
marci@1031:   public:
marci@1048:     typedef LPSolverBase<double> Parent;
marci@1031: 
marci@1031:   public:
marci@1031:     /// \e
marci@1031:     LPX* lp;
marci@1031: 
marci@1031:   public:
marci@1031:     /// \e
marci@1081:     LPGLPK() : Parent(), 
marci@1031: 			lp(lpx_create_prob()) {
marci@1031:       lpx_set_int_parm(lp, LPX_K_DUAL, 1);
marci@1031:     }
marci@1031:     /// \e
marci@1081:     ~LPGLPK() {
marci@1031:       lpx_delete_prob(lp);
marci@1031:     }
marci@1081: 
marci@1081:     //MATRIX INDEPEDENT MANIPULATING FUNCTIONS
marci@1081: 
marci@1031:     /// \e
marci@1031:     void setMinimize() { 
marci@1031:       lpx_set_obj_dir(lp, LPX_MIN);
marci@1031:     }
marci@1031:     /// \e
marci@1031:     void setMaximize() { 
marci@1031:       lpx_set_obj_dir(lp, LPX_MAX);
marci@1031:     }
marci@1081: 
marci@1081:     //LOW LEVEL INTERFACE, MATRIX MANIPULATING FUNCTIONS
marci@1081: 
marci@1074:   protected:
marci@1031:     /// \e
marci@1074:     int _addCol() { 
marci@1074:       return lpx_add_cols(lp, 1);
marci@1031:     }
marci@1031:     /// \e
marci@1074:     int _addRow() { 
marci@1074:       return lpx_add_rows(lp, 1);
marci@1074:     }
marci@1074:     /// \e
marci@1081:     virtual void _setRowCoeffs(int i, 
marci@1081: 			       std::vector<std::pair<int, double> > coeffs) {
marci@1074:       int mem_length=1+colNum();
marci@1074:       int* indices = new int[mem_length];
marci@1074:       double* doubles = new double[mem_length];
marci@1074:       int length=0;
marci@1074:       for (std::vector<std::pair<int, double> >::
marci@1074: 	     const_iterator it=coeffs.begin(); it!=coeffs.end(); ++it) {
marci@1074: 	++length;
marci@1074: 	indices[length]=it->first;
marci@1074: 	doubles[length]=it->second;
marci@1081: // 	std::cout << "  " << indices[length] << " " 
marci@1081: // 		  << doubles[length] << std::endl;
marci@1031:       }
marci@1081: //      std::cout << i << " " << length << std::endl;
marci@1074:       lpx_set_mat_row(lp, i, length, indices, doubles);
marci@1074:       delete [] indices;
marci@1074:       delete [] doubles;
marci@1031:     }
marci@1074:     /// \e
marci@1081:     virtual void _setColCoeffs(int i, 
marci@1081: 			       std::vector<std::pair<int, double> > coeffs) {
marci@1074:       int mem_length=1+rowNum();
marci@1074:       int* indices = new int[mem_length];
marci@1074:       double* doubles = new double[mem_length];
marci@1074:       int length=0;
marci@1074:       for (std::vector<std::pair<int, double> >::
marci@1074: 	     const_iterator it=coeffs.begin(); it!=coeffs.end(); ++it) {
marci@1074: 	++length;
marci@1074: 	indices[length]=it->first;
marci@1074: 	doubles[length]=it->second;
marci@1074:       }
marci@1074:       lpx_set_mat_col(lp, i, length, indices, doubles);
marci@1074:       delete [] indices;
marci@1074:       delete [] doubles;
marci@1031:     }
marci@1031:     /// \e
marci@1074:     virtual void _eraseCol(int i) {
marci@1031:       int cols[2];
marci@1074:       cols[1]=i;
marci@1031:       lpx_del_cols(lp, 1, cols);
marci@1031:     }
marci@1074:     virtual void _eraseRow(int i) {
marci@1031:       int rows[2];
marci@1074:       rows[1]=i;
marci@1031:       lpx_del_rows(lp, 1, rows);
marci@1031:     }
marci@1081:     virtual void _setColBounds(int i, Bound bound, 
marci@1081: 			       double lo, double up) {
marci@1081:       switch (bound) {
marci@1081:       case FREE:
marci@1081: 	lpx_set_col_bnds(lp, i, LPX_FR, lo, up);
marci@1081: 	break;
marci@1081:       case LOWER:
marci@1081: 	lpx_set_col_bnds(lp, i, LPX_LO, lo, up);
marci@1081: 	break;
marci@1081:       case UPPER:
marci@1081: 	lpx_set_col_bnds(lp, i, LPX_UP, lo, up);
marci@1081: 	break;
marci@1081:       case DOUBLE:
marci@1081: 	lpx_set_col_bnds(lp, i, LPX_DB, lo, up);
marci@1081: 	break;
marci@1081:       case FIXED:
marci@1081: 	lpx_set_col_bnds(lp, i, LPX_FX, lo, up);
marci@1081: 	break;
marci@1081:       }
marci@1081:     } 
marci@1081:     virtual void _setRowBounds(int i, Bound bound, 
marci@1081: 			       double lo, double up) {
marci@1081:       switch (bound) {
marci@1081:       case FREE:
marci@1081: 	lpx_set_row_bnds(lp, i, LPX_FR, lo, up);
marci@1081: 	break;
marci@1081:       case LOWER:
marci@1081: 	lpx_set_row_bnds(lp, i, LPX_LO, lo, up);
marci@1081: 	break;
marci@1081:       case UPPER:
marci@1081: 	lpx_set_row_bnds(lp, i, LPX_UP, lo, up);
marci@1081: 	break;
marci@1081:       case DOUBLE:
marci@1081: 	lpx_set_row_bnds(lp, i, LPX_DB, lo, up);
marci@1081: 	break;
marci@1081:       case FIXED:
marci@1081: 	lpx_set_row_bnds(lp, i, LPX_FX, lo, up);
marci@1081: 	break;
marci@1081:       }
marci@1081:     } 
marci@1081:   protected:
marci@1031:     /// \e
marci@1081:     virtual double _getObjCoef(int i) { 
marci@1081:       return lpx_get_obj_coef(lp, i);
marci@1031:     }
marci@1031:     /// \e
marci@1081:     virtual void _setObjCoef(int i, double obj_coef) { 
marci@1081:       lpx_set_obj_coef(lp, i, obj_coef);
marci@1031:     }
marci@1081:   public:
marci@1031:     /// \e
marci@1031:     void solveSimplex() { lpx_simplex(lp); }
marci@1031:     /// \e
marci@1031:     void solvePrimalSimplex() { lpx_simplex(lp); }
marci@1031:     /// \e
marci@1031:     void solveDualSimplex() { lpx_simplex(lp); }
marci@1031:     /// \e
marci@1081:   protected:
marci@1081:     virtual double _getPrimal(int i) {
marci@1081:       return lpx_get_col_prim(lp, i);
marci@1031:     }
marci@1081:   public:
marci@1031:     /// \e
marci@1031:     double getObjVal() { return lpx_get_obj_val(lp); }
marci@1031:     /// \e
marci@1031:     int rowNum() const { return lpx_get_num_rows(lp); }
marci@1031:     /// \e
marci@1031:     int colNum() const { return lpx_get_num_cols(lp); }
marci@1031:     /// \e
marci@1031:     int warmUp() { return lpx_warm_up(lp); }
marci@1031:     /// \e
marci@1031:     void printWarmUpStatus(int i) {
marci@1031:       switch (i) {
marci@1031:       case LPX_E_OK: cout << "LPX_E_OK" << endl; break;
marci@1031:       case LPX_E_EMPTY: cout << "LPX_E_EMPTY" << endl; break;	
marci@1031:       case LPX_E_BADB: cout << "LPX_E_BADB" << endl; break;
marci@1031:       case LPX_E_SING: cout << "LPX_E_SING" << endl; break;
marci@1031:       }
marci@1031:     }
marci@1031:     /// \e
marci@1031:     int getPrimalStatus() { return lpx_get_prim_stat(lp); }
marci@1031:     /// \e
marci@1031:     void printPrimalStatus(int i) {
marci@1031:       switch (i) {
marci@1031:       case LPX_P_UNDEF: cout << "LPX_P_UNDEF" << endl; break;
marci@1031:       case LPX_P_FEAS: cout << "LPX_P_FEAS" << endl; break;	
marci@1031:       case LPX_P_INFEAS: cout << "LPX_P_INFEAS" << endl; break;
marci@1031:       case LPX_P_NOFEAS: cout << "LPX_P_NOFEAS" << endl; break;
marci@1031:       }
marci@1031:     }
marci@1031:     /// \e
marci@1031:     int getDualStatus() { return lpx_get_dual_stat(lp); }
marci@1031:     /// \e
marci@1031:     void printDualStatus(int i) {
marci@1031:       switch (i) {
marci@1031:       case LPX_D_UNDEF: cout << "LPX_D_UNDEF" << endl; break;
marci@1031:       case LPX_D_FEAS: cout << "LPX_D_FEAS" << endl; break;	
marci@1031:       case LPX_D_INFEAS: cout << "LPX_D_INFEAS" << endl; break;
marci@1031:       case LPX_D_NOFEAS: cout << "LPX_D_NOFEAS" << endl; break;
marci@1031:       }
marci@1031:     }
marci@1031:     /// Returns the status of the slack variable assigned to row \c row_it.
marci@1031:     int getRowStat(const RowIt& row_it) { 
marci@1031:       return lpx_get_row_stat(lp, row_iter_map[row_it]); 
marci@1031:     }
marci@1031:     /// \e
marci@1031:     void printRowStatus(int i) {
marci@1031:       switch (i) {
marci@1031:       case LPX_BS: cout << "LPX_BS" << endl; break;
marci@1031:       case LPX_NL: cout << "LPX_NL" << endl; break;	
marci@1031:       case LPX_NU: cout << "LPX_NU" << endl; break;
marci@1031:       case LPX_NF: cout << "LPX_NF" << endl; break;
marci@1031:       case LPX_NS: cout << "LPX_NS" << endl; break;
marci@1031:       }
marci@1031:     }
marci@1031:     /// Returns the status of the variable assigned to column \c col_it.
marci@1031:     int getColStat(const ColIt& col_it) { 
marci@1031:       return lpx_get_col_stat(lp, col_iter_map[col_it]); 
marci@1031:     }
marci@1031:     /// \e
marci@1031:     void printColStatus(int i) {
marci@1031:       switch (i) {
marci@1031:       case LPX_BS: cout << "LPX_BS" << endl; break;
marci@1031:       case LPX_NL: cout << "LPX_NL" << endl; break;	
marci@1031:       case LPX_NU: cout << "LPX_NU" << endl; break;
marci@1031:       case LPX_NF: cout << "LPX_NF" << endl; break;
marci@1031:       case LPX_NS: cout << "LPX_NS" << endl; break;
marci@1031:       }
marci@1031:     }
marci@1031:   };
marci@1031:   
marci@1031:   /// @}
marci@1031: 
marci@1031: } //namespace lemon
marci@1031: 
marci@1031: #endif //LEMON_LP_SOLVER_WRAPPER_H