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Variables.h

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/* OOQP                                                               *
 * Authors: E. Michael Gertz, Stephen J. Wright                       *
 * (C) 2001 University of Chicago. See Copyright Notification in OOQP */

#ifndef VARIABLES_H
#define VARIABLES_H

class LinearSystem;
class Residuals;
class Data;
class Solver;
class Variables
{
public:
  int nComplementaryVariables;
  
  virtual double mu() = 0;

  virtual double mustep(Variables *step, double alpha) = 0;

  virtual void negate() = 0;

  virtual void saxpy( Variables *b, double alpha) = 0;
  
  virtual double stepbound( Variables *b ) = 0;

  virtual double findBlocking( Variables * step, 
                               double & primalValue,
                               double & primalStep,
                               double & dualValue,
                               double & dualStep,
                               int& firstOrSecond ) = 0;

  virtual void interiorPoint( double alpha, double beta ) = 0;

  virtual void shiftBoundVariables( double alpha, double beta ) = 0;

  virtual double violation() = 0;

  virtual void print();

  virtual void copy(Variables *b) = 0;

  virtual double onenorm() = 0;

  virtual double infnorm() = 0;

  virtual ~Variables() {};
};

#endif

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