src/main/decaf/lang/Character.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_CHARACTER_H_
#define _DECAF_LANG_CHARACTER_H_

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

namespace decaf{
namespace lang{

    class DECAF_API Character : public Number,
                                public Comparable<Character>,
                                public Comparable<char> {
    private:

        // The primitive Char value
        char value;

    public:

        static const int MIN_RADIX = 2;

        static const int MAX_RADIX = 36;

        static const char MIN_VALUE = (char)0x7F;

        static const char MAX_VALUE = (char)0x80;

        static const int SIZE = 8;

    public:

        Character( char value );

        virtual int compareTo( const Character& c ) const {
            return this->value < c.value ? -1 : (this->value > c.value) ? 1 : 0;
        }

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

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

        virtual int compareTo( const char& c ) const {
            return this->value < c ? -1 : (this->value > c) ? 1 : 0;
        }

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

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

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

        bool equals( const char& c ) const {
            return this->value == c;
        }

        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 (int)this->value;
        }

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

    public:    // statics

        static Character valueOf( char value ) {
            return Character( value );
        }

        static bool isWhitespace( char c ){
            switch ( c )
            {
                case '\n':
                case '\t':
                case '\r':
                case '\f':
                case ' ':
                    return true;
            }

            return false;
        }

        static bool isDigit( char c ){
            return c >= '0' && c <= '9';
        }

        static bool isLowerCase( char c ){
            return c >= 'a' && c <= 'z';
        }

        static bool isUpperCase( char c ){
            return c >= 'A' && c <= 'Z';
        }

        static bool isLetter( char c ){
            return isUpperCase(c) || isLowerCase(c);
        }

        static bool isLetterOrDigit( char c ){
            return isLetter(c) || isDigit(c);
        }

        static bool isISOControl( char c ) {
            return ( c >= 0 && c <= 0x1f ) ||
                   ( (unsigned char)c >= 0x7f && (unsigned char)c <= 0x9f );
        }

        static int digit(char c, int radix);

        static char toLowerCase(char value) {
            if ('A' <= value && value <= 'Z') {
                return (char) (value + ('a' - 'A'));
            }

            return value;
        }

        static char toUpperCase(char value) {
            if ('a' <= value && value <= 'z') {
                return (char) (value - ('a' - 'A'));
            }

            return value;
        }

    };

}}

#endif /*_DECAF_LANG_CHARACTER_H_*/

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