Float.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _DECAF_LANG_FLOAT_H_
#define _DECAF_LANG_FLOAT_H_

#include <decaf/util/Config.h>
#include <decaf/lang/Number.h>
#include <decaf/lang/Comparable.h>
#include <decaf/lang/exceptions/NumberFormatException.h>
#include <string>

namespace decaf{
namespace lang{

    class DECAF_API Float : public Number,
                            public Comparable<Float>,
                            public Comparable<float> {
    private:

        float value;

    public:

        static const int SIZE = 32;

        static const float MAX_VALUE;

        static const float MIN_VALUE;

        static const float NaN;

        static const float POSITIVE_INFINITY;

        static const float NEGATIVE_INFINITY;

    public:

        Float( float value );

        Float( double value );

        Float( const std::string& value );

        virtual ~Float() {}

        virtual int compareTo( const Float& f ) const;

        bool equals( const Float& f ) const {
            return this->value == f.value;
        }

        virtual bool operator==( const Float& f ) const {
            return this->value == f.value;
        }

        virtual bool operator<( const Float& f ) const {
            return this->value < f.value;
        }

        virtual int compareTo( const float& f ) const;

        bool equals( const float& f ) const {
            return this->value == f;
        }

        virtual bool operator==( const float& f ) const {
            return this->value == f;
        }

        virtual bool operator<( const float& f ) const {
            return this->value < f;
        }

        std::string toString() const;

        virtual double doubleValue() const {
            return (double)this->value;
        }

        virtual float floatValue() const {
            return this->value;
        }

        virtual unsigned char byteValue() const {
            return (unsigned char)this->value;
        }

        virtual short shortValue() const {
            return (short)this->value;
        }

        virtual int intValue() const {
            return (int)this->value;
        }

        virtual long long longValue() const {
            return (long long)this->value;
        }

        bool isInfinite() const;

        bool isNaN() const;

    public:   // Statics

        static int compare( float f1, float f2 );

        static int floatToIntBits( float value );

        static int floatToRawIntBits( float value );

        static float intBitsToFloat( int bits );

        static bool isInfinite( float value );

        static bool isNaN( float value );

        static float parseFloat( const std::string& value );

        static std::string toHexString( float value );

        static std::string toString( float value );

        static Float valueOf( float value );

        static Float valueOf( const std::string& value );

    private:

        static const unsigned int SINGLE_EXPONENT_MASK = 0x7F800000;
        static const unsigned int SINGLE_MANTISSA_MASK = 0x007FFFFF;
        static const unsigned int SINGLE_NAN_BITS = (SINGLE_EXPONENT_MASK | 0x00400000);

    };

}}

#endif /*_DECAF_LANG_FLOAT_H_*/