// File: RLI.h
//
// Version: 0.1 (semi-lamo)
//
//

#ifndef RLI_H
#define RLI_H

const unsigned int RLI_SIZE = 8 ;
const unsigned short CHARMAX = 256 ;


class RLI { // acronym for ReallyLongInt

public:

   // Default constructor 
   //
   RLI() ;


   // Alternate constructor for 16 bytes
   //
   RLI(bool isNeg, unsigned char A[]) ;


   // Accessor
   //
   unsigned int size() const ;
   void Print() const ;


   // Arithmetic C = A op B
   //
   static void Add (RLI& C,  const RLI& A,  const RLI& B) ;
   static void Sub (RLI& C,  const RLI& A,  const RLI& B) ;
   static void MulByChar (RLI& C,  const RLI& A,  const unsigned char b) ;

//  Not yet implemented
//
//   static void Mul (RLI& C,  const RLI& A,  const RLI& B) ;
//   static void Div (RLI& C,  const RLI& A,  const RLI& B) ;
//   static void Mod (RLI& C,  const RLI& A,  const RLI& B) ;


   // Comparisons
   //
   static bool LT (const RLI& A,  const RLI& B) ;   // <
   static bool LE (const RLI& A,  const RLI& B) ;   // <=
   static bool EQ (const RLI& A,  const RLI& B) ;   // ==
   static bool GE (const RLI& A,  const RLI& B) ;   // >=
   static bool GT (const RLI& A,  const RLI& B) ;   // >

   static bool NE (const RLI& A,  const RLI& B) ;   // !=


private:

   unsigned char d[RLI_SIZE] ;
   bool neg ;    // true = negative, false = positive

   bool valid ;  // overflow?

   static void AbsAdd (RLI& C,  const RLI& A,  const RLI& B) ;
   static void AbsSub (RLI& C,  const RLI& A,  const RLI& B) ;
   static bool AbsLT (const RLI& A,  const RLI& B) ;

} ;


#endif