int64.hpp

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*                            Open Watcom Project
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extern "C" {
    #include "i64.h"
}

class int64 {

    public:
        int64()
        {
            U64Clear( _d );
        }
        int64( long i )
        {
            I32ToI64( i, &_d );
        }
        int64( unsigned long hi, long lo )
        {
            _d.u._32[I64HI32] = hi;
            _d.u._32[I64LO32] = lo;
        }

        int64 operator=( const int64 & a )
        {
            this->_d.u._32[0] = a._d.u._32[0];
            this->_d.u._32[1] = a._d.u._32[1];
            return( *this );
        }

        int64 operator+( const int64 & a ) const
        {
            int64 res;
            U64Add( &this->_d, &a._d, &res._d );
            return( res );
        }
        int64 operator+=( const int64 & a )
        {
            *this = *this + a;
            return( *this );
        }
        int64 operator-( const int64 & a ) const
        {
            int64 res;
            U64Sub( &this->_d, &a._d, &res._d );
            return( res );
        }
        int64 operator-=( const int64 & a )
        {
            *this = *this - a;
            return( *this );
        }
        int64 operator-() const
        {
            int64 neg;
            U64Neg( &this->_d, &neg._d );
            return( neg );
        }

        int64 operator*( const int64 & a ) const
        {
            int64 result;
            U64Mul( &this->_d, &a._d, &result._d );
            return( result );
        }
        int64 operator*=( const int64 & a )
        {
            *this = *this * a;
            return( *this );
        }

        int64 operator/( const int64 & a ) const
        {
            int64 div,rem;
            I64Div( &this->_d, &a._d, &div._d, &rem._d );
            return( div );
        }
        int64 operator/=( const int64 & a )
        {
            *this = *this * a;
            return( *this );
        }

        int64 operator%( const int64 & a ) const
        {
            int64 div,rem;
            I64Div( &this->_d, &a._d, &div._d, &rem._d );
            return( rem );
        }
        int64 operator%=( const int64 & a )
        {
            *this = *this * a;
            return( *this );
        }

        int64 operator&( const int64 & a ) const
        {
            int64 result;
            U64And( &this->_d, &a._d, &result._d );
            return( result );
        }
        int64 operator&=( const int64 & a )
        {
            *this = *this & a;
            return( *this );
        }

        int64 operator|( const int64 & a ) const
        {
            int64 result;
            U64Or( &this->_d, &a._d, &result._d );
            return( result );
        }
        int64 operator|=( const int64 & a )
        {
            *this = *this | a;
            return( *this );
        }

        int64 operator^( const int64 & a ) const
        {
            int64 result;
            U64Xor( &this->_d, &a._d, &result._d );
            return( result );
        }
        int64 operator^=( const int64 & a )
        {
            *this = *this ^ a;
            return( *this );
        }

        int64 operator~() const
        {
            int64 not;
            U64Not( &this->_d, &not._d );
            return( not );
        }

        int64 operator<<( unsigned a ) const
        {
            int64 result;
            U64ShiftL( &this->_d, a, &result._d );
            return( result );
        }
        int64 operator<<=( unsigned a )
        {
            *this = *this << a;
            return( *this );
        }

        int64 operator>>( unsigned a ) const
        {
            int64 result;
            I64ShiftR( &this->_d, a, &result._d );
            return( result );
        }
        int64 operator>>=( unsigned a )
        {
            *this = *this >> a;
            return( *this );
        }

        int operator>( const int64 &a ) const
        {
            return( Compare( a ) > 0 );
        }
        int operator<( const int64 &a ) const
        {
            return( Compare( a ) < 0 );
        }
        int operator>=( const int64 &a ) const
        {
            return( Compare( a ) >= 0 );
        }
        int operator<=( const int64 &a ) const
        {
            return( Compare( a ) <= 0 );
        }
        int operator==( const int64 &a ) const
        {
            return( Compare( a ) == 0 );
        }
        int operator!=( const int64 &a ) const
        {
            return( Compare( a ) != 0 );
        }
        int64 &operator ++()
        {
            U64IncDec( &this->_d, 1 );
            return *this;
        }
        int64 &operator --()
        {
            U64IncDec( &this->_d, -1 );
            return *this;
        }
        int64 operator ++( int )
        {
            int64 res = *this;
            U64IncDec( &this->_d, 1 );
            return res;
        }
        int64 operator --( int )
        {
            int64 res = *this;
            U64IncDec( &this->_d, -1 );
            return res;
        }
        unsigned_32 truncate() const
        {
            return( U32FetchTrunc( this->_d ) );
        }
        divmod( const int64 &a, int64 &quot, int64 &rem )
        {
            I64Div( &this->_d, &a._d, &quot._d, &rem._d );
        }
        #ifdef __SW_FPI
            #pragma aux int64_from_double = \
                "fld    qword ptr [esi]" \
                "fistp  qword ptr [edi]" \
                parm [ edi ] [ esi ]

            #pragma aux int64_to_double = \
                "fild   qword ptr [edi]" \
                "fstp   qword ptr [esi]" \
                parm [ edi ] [ esi ]

            SetDouble( double d )
            {
                int64_from_double( &this->_d, &d );
            }
            double GetDouble() const
            {
                double d;
                int64_to_double( &this->_d, &d );
                return( d );
            }
        #endif

    private:
        int Compare( const int64 &a ) const
        {
            return( I64Cmp( &this->_d, &a._d ) );
        }


    private:
        signed_64       _d;
};