source: src/ResolvExpr/Cost.h@ 5189888

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// Cost.h -- 
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 09:39:50 2015
// Last Modified By : Rob Schluntz
// Last Modified On : Wed Jul 22 16:43:10 2015
// Update Count     : 4
//

#ifndef COST_H
#define COST_H

#include <iostream>

namespace ResolvExpr {
        class Cost {
          public:
                Cost();
                Cost( int unsafe, int poly, int safe );
  
                void incUnsafe( int inc = 1 );
                void incPoly( int inc = 1 );
                void incSafe( int inc = 1 );
  
                Cost operator+( const Cost &other ) const;
                Cost operator-( const Cost &other ) const;
                Cost &operator+=( const Cost &other );
                bool operator<( const Cost &other ) const;
                bool operator==( const Cost &other ) const;
                bool operator!=( const Cost &other ) const;
                friend std::ostream &operator<<( std::ostream &os, const Cost &cost );
  
                static const Cost zero;
                static const Cost infinity;
          private:
                int compare( const Cost &other ) const;

                int unsafe;
                int poly;
                int safe;
        };

        inline Cost::Cost() : unsafe( 0 ), poly( 0 ), safe( 0 ) {}

        inline Cost::Cost( int unsafe, int poly, int safe ) : unsafe( unsafe ), poly( poly ), safe( safe ) {}

        inline void Cost::incUnsafe( int inc ) {
                unsafe += inc;
        }

        inline void Cost::incPoly( int inc ) {
                poly += inc;
        }

        inline void Cost::incSafe( int inc ) {
                safe += inc;
        }

        inline Cost Cost::operator+( const Cost &other ) const {
                return Cost( unsafe + other.unsafe, poly + other.poly, safe + other.safe );
        }

        inline Cost Cost::operator-( const Cost &other ) const {
                return Cost( unsafe - other.unsafe, poly - other.poly, safe - other.safe );
        }

        inline Cost &Cost::operator+=( const Cost &other ) {
                unsafe += other.unsafe;
                poly += other.poly;
                safe += other.safe;
                return *this;
        }

        inline bool Cost::operator<( const Cost &other ) const {
            if ( *this == infinity ) return false;
            if ( other == infinity ) return true;
            if ( unsafe > other.unsafe ) {
                        return false;
            } else if ( unsafe < other.unsafe ) {
                        return true;
            } else if ( poly > other.poly ) {
                        return false;
            } else if ( poly < other.poly ) {
                        return true;
            } else if ( safe > other.safe ) {
                        return false;
            } else if ( safe < other.safe ) {
                        return true;
            } else {
                        return false;
            } // if
        }

        inline bool Cost::operator==( const Cost &other ) const {
                return unsafe == other.unsafe
                        && poly == other.poly
                        && safe == other.safe;
        }

        inline bool Cost::operator!=( const Cost &other ) const {
                return !( *this == other );
        }

        inline std::ostream &operator<<( std::ostream &os, const Cost &cost ) {
                os << "( " << cost.unsafe << ", " << cost.poly << ", " << cost.safe << " )";
                return os;
        }
} // namespace ResolvExpr

#endif // COST_H

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //