StdForm.h

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#ifndef STDFORM_H
#define STDFORM_H

#include <vector>

using namespace std;

class StdForm {
  public:
    enum TYPE_TRANSFORM {NON_ZERO_LB, _INF_LB, FREE_VAR, X_, SLACK, SURPLUS};
    
    struct Transform { 
      TYPE_TRANSFORM type; 
      double bound; 

      int x_index; 

    };
    
    int numOrigVars; 
    int numTransfVars; 
    int m_cons; 

    int numTransforms; 
    int *origVars; 
    int *transfVars; 
    Transform *transforms; 

    double constantFObj; 
    vector<int> *deletedRows; 
    
    double *xOrig; 
    double *yOrig; 
    double *GxOrig; 
    double *HxOrig; 
    double *wOrig; 
    double *zOrig; 
    
    
    void (*fobj) (int n, double x[], double &fx, double Gx[], double Hx[], void *params);
    
    // Constructor
    StdForm();
    
    // Destructor
    ~StdForm();
    
    // Function to calculate the objective function in a transformed variables point
    void fobj_stdform(int n, double x[], double &fx, double Gx[], double Hx[], void *params);
    
    // Converts a point from transformed variables to original variables space
    void transformed_to_original_primal_variables(double* x);
    
    // Converts the dual variables of contraints from transformed to original variables space
    void transformed_to_original_dual_variables(double* y, double* w, double* z);
    
    // Converts a point from original variables to transformed variables space
    void original_to_transformed_primal_variables(double* &xout, double* xin);
    
    // Transforms objective function from original variables to transformed variables space
    void transform_linear_and_quadratic_cost(double* &cost, double* &qcost, double &constant);
    
    // Converts the variable names from original variables to transformed variables space
    void original_to_transformed_names(string* &outVarNames, string* inVarNames, string* &outConsNames, string* inConsNames);
    
    // Deletes the positions belonging to new variables
    void delete_new_variables(double* &xout, double* xin);
};

#endif //STDFORM_H