FreeCell for CLI Code

/*
 * FreeCell for C.L.I. (Command Line Interface)
 *
 * File		: card.h
 * Author	: Anupam Srivastava
 * E-Mail	: anupam.srivastava@gmail.com
 * Purpose	: C++ header file which defines Card class. It is deliberately
 * 	generic for use with any other program.
 * 
 * NOTE:
 * 	This program is derived from FreeCell for DOS v 1.1 by me. It was for Turbo
 * 	C++ v 3.0, and used custom libraries. Most of such code is removed and aim
 * 	of this program is to just be in standard c++. The original program was not
 * 	throughly checked for bugs.
 * 	Any comments and improvements are invited at anupam.srivastava@gmail.com.
 *
 * 	Indentation is left to Vim editor.
 *
 * LICENSE:
 * 	This program is in public domain. If you find this program helpful in
 * 	anyway, you can send me an email and satisfy my narcissistic needs, thus
 * 	making me happy. ;)
 */

#ifndef _CARD_H

#define _CARD_H 1
#include <string>
#include <sstream>

const int TWO_2 = 2;
const int THREE_3 = 3;
const int FOUR_4 = 4;
const int FIVE_5 = 5;
const int SIX_6 = 6;
const int SEVEN_7 = 7;
const int EIGHT_8 = 8;
const int NINE_9 = 9;
const int TEN_10 = 10;
const int JAILER_11 = 11;
const int QUEEN_12 = 12;
const int KING_13 = 13;
const int ACE_14 = 14;

const char SPADES = 'S';
const char DIAMONDS = 'D';
const char CLUBS = 'C';
const char HEARTS = 'H';

const int INIT_VALUE = 0;
const char INIT_FACE = '\0';

/* Card class represents a playing card with following values:
 * TWO_2, THREE_3, FOUR_4, FIVE_5, SIX_6, SEVEN_7, EIGHT_8, NINE_9, TEN_10
 * JAILER_11, QUEEN_12, KING_13, ACE_14
 * of following suits:
 * SPADES, DIAMONDS, CLUBS, HEARTS
 */
class Card {
	private:
		int value;
		char face;
		
		static bool is_valid_value(int card_value);
		static bool is_valid_face(char card_face);
	public:
		Card() : value(INIT_VALUE), face(INIT_FACE) {
		}

		void reset();
		bool set_value(int card_value);
		bool set_face(char card_face);
		bool set_card(int card_value, char card_face);
		bool is_valid();
		std::string get_output_string();
		int get_value();
		int get_face();
		bool is_equal_to(Card card);
		bool next_small_alternate(Card card2);
		bool next_large_same(Card card2);
};

inline
bool Card::is_valid_value(int card_value) {
	if (TWO_2 <= card_value && card_value <= ACE_14) {
		return true;
	}
	return false;
}

inline
bool Card::is_valid_face(char card_face) {
	switch (card_face) {
		case SPADES:
		case DIAMONDS:
		case CLUBS:
		case HEARTS:
			return true;
			break;
	}
	return false;
}

inline
void Card::reset() {
	value = INIT_VALUE;
	face = INIT_FACE;
}

inline
bool Card::set_value(int card_value) {
	if (is_valid_value(card_value)) {
		value = card_value;
		return true;
	}
	return false;
}

inline
bool Card::set_face(char card_face) {
	if (is_valid_face(card_face)) {
		face = card_face;
		return true;
	}
	return false;
}

inline
bool Card::set_card(int card_value, char card_face) {
	return set_value(card_value) && set_face(card_face);
}

inline
bool Card::is_valid() {
	return is_valid_value(value) && is_valid_face(face);
}

std::string Card::get_output_string() {
	std::string output = "";
	if (is_valid()) {
		if (value == TEN_10) {
			output = "10";
		} else if (value == JAILER_11) {
			output = "J";
		} else if (value == QUEEN_12) {
			output = "Q";
		} else if (value == KING_13) {
			output = "K";
		} else if (value == ACE_14) {
			output = "A";
		} else {
			std::stringstream ss;
			ss << value;
			output = ss.str();
		}
		output += face;
	}
	return output;
}

inline
int Card::get_value() {
	return value;
}

inline
int Card::get_face() {
	return face;
}

inline
bool Card::is_equal_to(Card card) {
	return (value == card.get_value() && face == card.get_face());
}

/* card2 comes after card1 (this)
 * but in decreasing order and alternate colour
 */
bool Card::next_small_alternate(Card card2) {
	bool card2_is_red = false;
	bool card1_is_red = false;
	if (card2.get_face() == DIAMONDS || card2.get_face() == HEARTS) {
		card2_is_red = true;
	}
	if (face == DIAMONDS || face == HEARTS) {
		card1_is_red = true;
	}
	/* Either value + 1 of card1 = value of card2
	 * or value of card1 = ACE_14 and value of card2 = 2
	 */
	return (card2_is_red != card1_is_red
			&& ((card2.get_value() + 1 == value)
				|| card2.get_value() - ACE_14 + 2 == value));
}

/* card2 comes after card1 (this)
 * but in increasing order
 */
bool Card::next_large_same(Card card2) {
	/* Either value + 1 of card1 = value of card2
	 * or value of card1 = ACE_14 and value of card2 = 2
	 */
	return (face == card2.get_face()
			&& (value + 1 == card2.get_value()
				|| value - ACE_14 + 2 == card2.get_value()));
}

#endif /* _CARD_H */