| /* |
| * 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: |
| |
| /** The minimum radix available for conversion to and from strings. */ |
| static const int MIN_RADIX = 2; |
| |
| /** The maximum radix available for conversion to and from strings. */ |
| static const int MAX_RADIX = 36; |
| |
| /** The minimum value that a signed char can take on. */ |
| static const char MIN_VALUE = (char)0x7F; |
| |
| /** The maximum value that a signed char can take on. */ |
| static const char MAX_VALUE = (char)0x80; |
| |
| /** The size of the primitive charactor in bits. */ |
| static const int SIZE = 8; |
| |
| public: |
| |
| /** |
| * @param value - char to wrap. |
| */ |
| Character( char value ); |
| |
| /** |
| * Compares this Character instance with another. |
| * @param c - the Character instance to be compared |
| * @return zero if this object represents the same char value as the |
| * argument; a positive value if this object represents a value greater |
| * than the passed in value, and -1 if this object repesents a value |
| * less than the passed in value. |
| */ |
| virtual int compareTo( const Character& c ) const { |
| return this->value < c.value ? -1 : (this->value > c.value) ? 1 : 0; |
| } |
| |
| /** |
| * Compares equality between this object and the one passed. |
| * @param c - the value to be compared to this one. |
| * @return true if this object is equal to the one passed. |
| */ |
| virtual bool operator==( const Character& c ) const { |
| return this->value == c.value; |
| } |
| |
| /** |
| * Compares this object to another and returns true if this object |
| * is considered to be less than the one passed. This |
| * @param c - the value to be compared to this one. |
| * @return true if this object is equal to the one passed. |
| */ |
| virtual bool operator<( const Character& c ) const { |
| return this->value < c.value; |
| } |
| |
| /** |
| * Compares this Character instance with a char type. |
| * @param c - the char instance to be compared |
| * @return zero if this object represents the same char value as the |
| * argument; a positive value if this object represents a value greater |
| * than the passed in value, and -1 if this object repesents a value |
| * less than the passed in value. |
| */ |
| virtual int compareTo( const char& c ) const { |
| return this->value < c ? -1 : (this->value > c) ? 1 : 0; |
| } |
| |
| /** |
| * Compares equality between this object and the one passed. |
| * @param c - the value to be compared to this one. |
| * @return true if this object is equal to the one passed. |
| */ |
| virtual bool operator==( const char& c ) const { |
| return this->value == c; |
| } |
| |
| /** |
| * Compares this object to another and returns true if this object |
| * is considered to be less than the one passed. This |
| * @param c - the value to be compared to this one. |
| * @return true if this object is equal to the one passed. |
| */ |
| virtual bool operator<( const char& c ) const { |
| return this->value < c; |
| } |
| |
| /** |
| * @returns true if the two Character Objects have the same value. |
| */ |
| bool equals( const Character& c ) const { |
| return this->value == c.value; |
| } |
| |
| /** |
| * @returns true if the two Characters have the same value. |
| */ |
| bool equals( const char& c ) const { |
| return this->value == c; |
| } |
| |
| /** |
| * @returns this Character Object as a String Representation |
| */ |
| std::string toString() const; |
| |
| /** |
| * Answers the double value which the receiver represents |
| * @return double the value of the receiver. |
| */ |
| virtual double doubleValue() const { |
| return (double)this->value; |
| } |
| |
| /** |
| * Answers the float value which the receiver represents |
| * @return float the value of the receiver. |
| */ |
| virtual float floatValue() const { |
| return (float)this->value; |
| } |
| |
| /** |
| * Answers the byte value which the receiver represents |
| * @return int the value of the receiver. |
| */ |
| virtual unsigned char byteValue() const { |
| return (unsigned char)this->value; |
| } |
| |
| /** |
| * Answers the short value which the receiver represents |
| * @return int the value of the receiver. |
| */ |
| virtual short shortValue() const { |
| return (short)this->value; |
| } |
| |
| /** |
| * Answers the int value which the receiver represents |
| * @return int the value of the receiver. |
| */ |
| virtual int intValue() const { |
| return (int)this->value; |
| } |
| |
| /** |
| * Answers the long value which the receiver represents |
| * @return long the value of the receiver. |
| */ |
| virtual long long longValue() const { |
| return (long long)this->value; |
| } |
| |
| public: // statics |
| |
| /** |
| * Returns a Character instance representing the specified char value. |
| * @param value - the primitive char to wrap. |
| * @returns a new Charactor instance that wraps this value. |
| */ |
| static Character valueOf( char value ) { |
| return Character( value ); |
| } |
| |
| /** |
| * Indicates whether or not the given character is considered |
| * whitespace. |
| */ |
| static bool isWhitespace( char c ){ |
| switch ( c ) |
| { |
| case '\n': |
| case '\t': |
| case '\r': |
| case '\f': |
| case ' ': |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Indicates whether or not the given character is |
| * a digit. |
| */ |
| static bool isDigit( char c ){ |
| return c >= '0' && c <= '9'; |
| } |
| |
| /** |
| * Indicates whether or not the given character is |
| * a lower case character. |
| */ |
| static bool isLowerCase( char c ){ |
| return c >= 'a' && c <= 'z'; |
| } |
| |
| /** |
| * Indicates whether or not the given character is |
| * a upper case character. |
| */ |
| static bool isUpperCase( char c ){ |
| return c >= 'A' && c <= 'Z'; |
| } |
| |
| /** |
| * Indicates whether or not the given character is |
| * a letter. |
| */ |
| static bool isLetter( char c ){ |
| return isUpperCase(c) || isLowerCase(c); |
| } |
| |
| /** |
| * Indicates whether or not the given character is |
| * either a letter or a digit. |
| */ |
| static bool isLetterOrDigit( char c ){ |
| return isLetter(c) || isDigit(c); |
| } |
| |
| /** |
| * Answers whether the character is an ISO control character, which |
| * is a char that lays in the range of 0 to 1f and 7f to 9f |
| * @param c - the character, including supplementary characters |
| * @return true if the char is an ISO control character |
| */ |
| static bool isISOControl( char c ) { |
| return ( c >= 0 && c <= 0x1f ) || |
| ( (unsigned char)c >= 0x7f && (unsigned char)c <= 0x9f ); |
| } |
| |
| /** |
| * Returns the numeric value of the character ch in the specified radix. |
| * |
| * If the radix is not in the range MIN_RADIX <= radix <= MAX_RADIX or if |
| * the value of ch is not a valid digit in the specified radix, -1 is |
| * returned. A character is a valid digit if at least one of the following |
| * is true: |
| * |
| * * The method isDigit is true of the character and the single-character |
| * decomposition is less than the specified radix. In this case the |
| * decimal digit value is returned. |
| * * The character is one of the uppercase Latin letters 'A' through 'Z' |
| * and its code is less than radix + 'A' - 10. In this case, |
| * ch - 'A' + 10 is returned. |
| * * The character is one of the lowercase Latin letters 'a' through 'z' |
| * and its code is less than radix + 'a' - 10. In this case, |
| * ch - 'a' + 10 is returned. |
| * |
| * @param c - the char to be converted |
| * @param radix - the radix of the number |
| * @returns the numeric value of the number represented in the given radix |
| */ |
| static int digit( char c, int radix ); |
| |
| }; |
| |
| }} |
| |
| #endif /*_DECAF_LANG_CHARACTER_H_*/ |