90 lines
2.0 KiB
C++
90 lines
2.0 KiB
C++
/*
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* Copyright 2007-2008, Christof Lutteroth, lutteroth@cs.auckland.ac.nz
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* Copyright 2007-2008, James Kim, jkim202@ec.auckland.ac.nz
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* Distributed under the terms of the MIT License.
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*/
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#ifndef VARIABLE_H
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#define VARIABLE_H
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#include <ObjectList.h>
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#include <String.h>
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namespace LinearProgramming {
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class Constraint;
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class LinearSpec;
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class Summand;
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/**
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* Contains minimum and maximum values.
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*/
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class Variable {
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public:
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int32 Index() const;
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int32 GlobalIndex() const;
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LinearSpec* LS() const;
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double Value() const;
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void SetValue(double value);
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double Min() const;
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void SetMin(double min);
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double Max() const;
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void SetMax(double max);
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void SetRange(double min, double max);
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const char* Label();
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void SetLabel(const char* label);
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operator BString() const;
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void GetString(BString& string) const;
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Constraint* IsEqual(Variable* var);
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Constraint* IsSmallerOrEqual(Variable* var);
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Constraint* IsGreaterOrEqual(Variable* var);
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Constraint* IsEqual(Variable* var,
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double penaltyNeg, double penaltyPos);
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Constraint* IsSmallerOrEqual(Variable* var,
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double penaltyNeg, double penaltyPos);
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Constraint* IsGreaterOrEqual(Variable* var,
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double penaltyNeg, double penaltyPos);
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bool IsValid();
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//! Dangerous the variable don't belong to the LinearSpec anymore,
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//! delete it yourself!
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void Invalidate();
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~Variable();
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protected:
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Variable(LinearSpec* ls);
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//! returns the ref count
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int32 AddReference();
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int32 RemoveReference();
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private:
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LinearSpec* fLS;
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double fValue;
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double fMin;
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double fMax;
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BString fLabel;
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bool fIsValid;
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int32 fReferenceCount;
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public:
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friend class LinearSpec;
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};
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typedef BObjectList<Variable> VariableList;
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} // namespace LinearProgramming
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using LinearProgramming::Variable;
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using LinearProgramming::VariableList;
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#endif // VARIABLE_H
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