//BigInteger.h
#ifndef BIG_INTEGER_H
#define BIG_INTEGER_H

/*
 * BIG_INTEGER_MAX_SIZE is the size the struct will have,
 * override this macro to obtain bigger integers otherwise
 * default value is of 32 byte
 */
#ifndef BIG_INTEGER_MAX_SIZE
#define BIG_INTEGER_MAX_SIZE 32
#endif
#define POSITIVE 1
#define NEGATIVE -1


typedef struct{

  unsigned char data[BIG_INTEGER_MAX_SIZE];
  short sign;

}BigInteger;
//----------------------------------------------Costructors----------------------------------------------------
/*
 * Standard method to initialize a BigInteger
 * Format has to be like that:
 * 3321 = {3,3,2,1}
 */
BigInteger* newBigInteger(int elements,int number[]);

/*
 * newBigIntegerFromChar(char* ) expects the input formatted as a string
 * like "8223123343456" input values not containing only digits
 * will result in a NULL
 */
BigInteger* newBigIntegerFromChar(char*);

BigInteger* newBigIntegerFromInt(int );

//----------------------------------------------Interfaces------------------------------------------------------
/*
 * Interface method to perform operations with BigInteger
 *
 */
BigInteger* add(BigInteger* ,BigInteger* );
BigInteger* sub(BigInteger* ,BigInteger* );

//-----------------------------------------------Utils----------------------------------------------------------
void print(BigInteger* );

#endif