haiku/headers/libs/linprog/Constraint.h

104 lines
2.2 KiB
C
Raw Normal View History

/*
* Copyright 2007-2008, Christof Lutteroth, lutteroth@cs.auckland.ac.nz
* Copyright 2007-2008, James Kim, jkim202@ec.auckland.ac.nz
* Distributed under the terms of the MIT License.
*/
#ifndef CONSTRAINT_H
#define CONSTRAINT_H
#include "OperatorType.h"
#include "Variable.h"
#include "Summand.h"
#include <File.h>
#include <List.h>
#include <String.h>
#include <SupportDefs.h>
#include <math.h>
namespace LinearProgramming {
class LinearSpec;
/**
* Hard linear constraint, i.e.&nbsp;one that must be satisfied.
* May render a specification infeasible.
*/
class Constraint {
public:
int32 Index() const;
BList* LeftSide();
void SetLeftSide(BList* summands);
void UpdateLeftSide();
void SetLeftSide(double coeff1, Variable* var1);
void SetLeftSide(double coeff1, Variable* var1,
double coeff2, Variable* var2);
void SetLeftSide(double coeff1, Variable* var1,
double coeff2, Variable* var2,
double coeff3, Variable* var3);
void SetLeftSide(double coeff1, Variable* var1,
double coeff2, Variable* var2,
double coeff3, Variable* var3,
double coeff4, Variable* var4);
OperatorType Op();
void SetOp(OperatorType value);
double RightSide() const;
void SetRightSide(double value);
double PenaltyNeg() const;
void SetPenaltyNeg(double value);
double PenaltyPos() const;
void SetPenaltyPos(double value);
const char* Label();
void SetLabel(const char* label);
void WriteXML(BFile* file);
Variable* DNeg() const;
Variable* DPos() const;
void SetOwner(void* owner);
void* Owner() const;
bool IsValid();
void Invalidate();
operator BString() const;
void GetString(BString& string) const;
~Constraint();
protected:
Constraint(LinearSpec* ls, BList* summands,
OperatorType op, double rightSide,
double penaltyNeg, double penaltyPos);
private:
LinearSpec* fLS;
BList* fLeftSide;
OperatorType fOp;
double fRightSide;
Summand* fDNegObjSummand;
Summand* fDPosObjSummand;
void* fOwner;
char* fLabel;
bool fIsValid;
public:
friend class LinearSpec;
};
} // namespace LinearProgramming
using LinearProgramming::Constraint;
#endif // CONSTRAINT_H