// **********************************************************************
// InfoTypes.h
//
//	Definitions of types and classes that are used to represent
//	the data in the computer.
//
// **********************************************************************
// CS251 -	Computer Organization
//			Spring 1997
//			Dickinson College
//			Grant Braught
//
// **********************************************************************
//

#ifndef INFOTYPES

#define INFOTYPES

#include <iostream.h>

#include "SysSpecs.h"
#include "Logic.h"

//
// Define the number of bits in each type of data.
//
#define BIT			1
#define BITPAIR		2
#define NIBBLE		4
#define BYTE		8
#define WORD		8*WORD_SIZE
#define MICROINST	39

//
// Class used for representing all types of bit oriented data.
//
class BitData
{
private:
	int		NumBits;

	// It would possibly be more efficient to allocate these
	// dynamically based on the Length of the instance declared.
	// However, it is much easier to do it this way.
	Bool	theBits[MICROINST];

public:
	// Overloaded Constructor Function.
	BitData(int InitNumBits = 1, Bool InitValue = FALSE);
	BitData(int InitNumBits, BitString InitValue);

	// Member access functions.
	int	Length() { return NumBits; };
	int Length(int NewLength) { return (NumBits = NewLength); };

	// Overloaded index operator.
	Bool& operator [] (int theIndex);

	// Value functions
	void Base2Value(BitString theValue);
	DecValue Base10Value(Bool Signed=FALSE);

	// Overloaded Assignment Operator
	BitData& operator = (BitString NewValue);
	BitData& operator = (BitData NewValue);
	BitData& operator = (Bool NewValue);

	// Overloaded upper half assignment operator.
	BitData& operator <<= (BitData NewValue);

	// Overloaded lower half assignment operator.
	BitData& operator >>= (BitData NewValue);
};


// Overloaded output function for the BitData class.
ostream& operator << (ostream& theStream, BitData theBitData);

#endif