#ifndef _POLY_H_
#define _POLY_H_

#include <stdio.h>
#include "list.h"

typedef List Polynomial;

/* Call this function to initialize the polynomial.  Yet another
   constructor-wannabe. */
void poly_initialize(Polynomial *);

/*  Reads a polynomial from the provided file.   The polynomial should
    be a list of "c e" pairs, where c is the coefficient and e is
    the exponent, and the e's are in sorted order.  A coefficient of
    0 terminates the polynomial. */
void poly_read(Polynomial *, FILE *);

/* Writes a polynomial in user-readable format to the specified file. */
void poly_write(Polynomial *, FILE *);

/* This function makes a copy of a polynomial.  The first argument is
   the source and the second the destination. */
void poly_copy(Polynomial *src, Polynomial *dest);

/* This function adds the first two polynomial argument and returns
   their sum through the third argument. */
void poly_add(Polynomial *op1, Polynomial *op2, Polynomial *result);

/* This function multiplies the first two polynomial argument and returns
   their product through the third argument. */
void poly_multiply(Polynomial *op1, Polynomial *op2, Polynomial *result);

/* This function frees the memory held by a polynomial. */
void poly_destroy(Polynomial *);

#endif