Integer.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_INTEGER_H_
#define _DECAF_LANG_INTEGER_H_

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

namespace decaf{
namespace lang{

    class DECAF_API Integer : public Number,
                              public Comparable<Integer>,
                              public Comparable<int> {
    private:

        // The primitve Integer value.
        int value;

    public:

        static const int SIZE = 32;

        static const int MAX_VALUE = (int)0x7FFFFFFF;

        static const int MIN_VALUE = (int)0x80000000;

    public:

        Integer( int value );

        Integer( const std::string& value );

        virtual ~Integer() {}

        virtual int compareTo( const Integer& i ) const;

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

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

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

        virtual int compareTo( const int& i ) const;

        bool equals( const int& i ) const {
            return this->value == i;
        }

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

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

        std::string toString() const;

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

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

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

    public:  // Statics

        static Integer decode( const std::string& value );

        static int reverseBytes( int value );

        static int reverse( int value );

        static int parseInt( const std::string& s, int radix );

        static int parseInt( const std::string& s );

        static Integer valueOf( int value ) {
            return Integer( value );
        }

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

        static Integer valueOf( const std::string& value, int radix );

        static int bitCount( int value );

        static std::string toString( int value );

        static std::string toString( int value, int radix );

        static std::string toHexString( int value );

        static std::string toOctalString( int value );

        static std::string toBinaryString( int value );

        static int highestOneBit( int value );

        static int lowestOneBit( int value );

        static int numberOfLeadingZeros( int value );

        static int numberOfTrailingZeros( int value );

        static int rotateLeft( int value, int distance );

        static int rotateRight( int value, int distance );

        static int signum( int value );

    private:

        static int parse( const std::string& value, int offset,
                          int radix, bool negative );

    };

}}

#endif /*_DECAF_LANG_INTEGER_H_*/