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// file: bigrational.h
// update: 09/25/02
#ifndef _BIGRATIONAL_H
#define _BIGRATIONAL_H
#include <cassert>
#include <cstdlib>
#include <iostream>
#include <gmp.h>
//#include <bigrand.h>
#include "bigint.h"
using namespace std;
class bigrational
{
friend class bigreal;
friend class bigcomplex;
mpq_t rep;
// conversion
bigint num() const;
bigint den() const;
bigint ceil() const;
bigint floor() const;
bigint trunc() const;
long lgAbs() const;
// arithmetic
bigrational add(const bigrational&) const;
bigrational sub(const bigrational&) const;
bigrational mul(const bigrational&) const;
bigrational div(const bigrational&) const;
bigrational neg() const;
bigrational abs() const;
bigrational inv() const;
// comparison
int equal(const bigrational&) const;
int cmp(const bigrational&) const;
int sgn() const;
public:
// constructor, assignment and destructor
bigrational();
bigrational(const unsigned int);
bigrational(const signed int);
bigrational(const unsigned long);
bigrational(const signed long);
bigrational(const double);
bigrational(const bigint&);
bigrational(const bigint&, const bigint&);
bigrational(const bigrational&);
bigrational& operator =(const bigrational&);
~bigrational();
// random
// friend bigrational DRand();
// conversion
unsigned long len() const;
double as_double() const;
int fits_bigint() const;
bigint as_bigint() const;
friend bigint num(const bigrational&);
friend bigint den(const bigrational&);
friend bigint ceil(const bigrational&);
friend bigint floor(const bigrational&);
friend bigint trunc(const bigrational&);
friend long lb4lgAbs(const bigrational&);
friend long ub4lgAbs(const bigrational&);
// arithmetic
friend bigrational operator +(const bigrational&, const bigrational&);
friend bigrational operator -(const bigrational&, const bigrational&);
friend bigrational operator *(const bigrational&, const bigrational&);
friend bigrational operator /(const bigrational&, const bigrational&);
friend bigrational operator -(const bigrational&);
friend bigrational abs(const bigrational&);
friend bigrational inv(const bigrational&);
// comparison
friend int operator ==(const bigrational&, const bigrational&);
friend int operator !=(const bigrational&, const bigrational&);
friend int operator <(const bigrational&, const bigrational&);
friend int operator <=(const bigrational&, const bigrational&);
friend int operator >(const bigrational&, const bigrational&);
friend int operator >=(const bigrational&, const bigrational&);
friend int sgn(const bigrational&);
friend int operator &&(const bigrational&, const bigrational&);
friend int operator ||(const bigrational&, const bigrational&);
friend int operator !(const bigrational&);
// arithemtic and assignment
bigrational& operator +=(const bigrational&);
bigrational& operator -=(const bigrational&);
bigrational& operator *=(const bigrational&);
bigrational& operator /=(const bigrational&);
// stream
friend ostream& operator <<(ostream&, const bigrational&);
friend istream& operator >>(istream&, bigrational&);
};
#endif
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