bigint.h

包含哈希,对称以及非对称的经典算法 包含经典事例

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#pragma ident "@(#)Bigint.h	1.6 96/01/29 Sun Microsystems"

#ifndef BIGINT_H
#define BIGINT_H

#include <stdio.h>
#include "my_types.h"
#include "Bstream.h"

class Bigint {
#define USE_DOUBLE	0
#define USE_BSTREAM	1
	int	flag;
	long  	longint;
	Bstream bstrint;
public:
	// Constructors etc
	Bigint();
	Bigint( short );
	Bigint( const char * );
	Bigint( const unsigned char *, int );
	Bigint& operator =(const Bigint &);
	Bigint(const Bigint &);
	~Bigint();
	// operators and member functions
	friend Bigint operator +(const Bigint &, const Bigint &);
	friend Bigint operator *(const Bigint &, const Bigint &);
	//friend Bigint operator /(const Bigint &, const Bigint &);
	friend Bigint operator -(const Bigint &, const Bigint &);
	friend Boolean operator <(const Bigint &, const Bigint &);
	//friend Boolean operator >(const Bigint &, const Bigint &);
	friend Boolean operator !=(const Bigint &, const Bigint &);
	friend Boolean operator ==(const Bigint &, const Bigint &);
	//friend Boolean operator <=(const Bigint &, const Bigint &);
	//friend Boolean operator >=(const Bigint &, const Bigint &);
	void print() const;		// Hex output
	void printd() const;		// Decimal output
	String getnumstr() const;	// Hex output to String
	String getnumstrd() const;	// Decimal output to String
	Bstream getbstr() const;	// return Bstream aspect
	int bits() const;		// Number of bits in this bigint
};

extern Bstream Bigint_to_Bstr(const Bigint&);
int convert_Bigint_to_bytes(const Bigint, int, unsigned char *);
int bits_in_bigint(const Bigint);

#endif BIGINT_H