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/*
mpi.h
by Michael J. Fromberger <sting@linguist.dartmouth.edu>
Copyright (C) 1998 Michael J. Fromberger, All Rights Reserved
Arbitrary precision integer arithmetic library
$Id: mpi.h,v 1.15 2001/09/17 14:16:22 sting Exp $
*/
#ifndef _H_MPI_
#define _H_MPI_
#include "mpi-config.h"
#define MP_LT -1
#define MP_EQ 0
#define MP_GT 1
#if MP_DEBUG
#undef MP_IOFUNC
#define MP_IOFUNC 1
#endif
#if MP_IOFUNC
#include <stdio.h>
#include <ctype.h>
#endif
#include <limits.h>
#define MP_NEG 1
#define MP_ZPOS 0
/* Included for compatibility... */
#define NEG MP_NEG
#define ZPOS MP_ZPOS
#define MP_OKAY 0 /* no error, all is well */
#define MP_YES 0 /* yes (boolean result) */
#define MP_NO -1 /* no (boolean result) */
#define MP_MEM -2 /* out of memory */
#define MP_RANGE -3 /* argument out of range */
#define MP_BADARG -4 /* invalid parameter */
#define MP_UNDEF -5 /* answer is undefined */
#define MP_LAST_CODE MP_UNDEF
#include "mpi-types.h"
/* Included for compatibility... */
#define DIGIT_BIT MP_DIGIT_BIT
#define DIGIT_MAX MP_DIGIT_MAX
/* Macros for accessing the mp_int internals */
#define SIGN(MP) ((MP)->sign)
#define USED(MP) ((MP)->used)
#define ALLOC(MP) ((MP)->alloc)
#define DIGITS(MP) ((MP)->dp)
#define DIGIT(MP,N) (MP)->dp[(N)]
#if MP_ARGCHK == 1
#define ARGCHK(X,Y) {if(!(X)){return (Y);}}
#elif MP_ARGCHK == 2
#include <assert.h>
#define ARGCHK(X,Y) assert(X)
#else
#define ARGCHK(X,Y) /* */
#endif
/* This defines the maximum I/O base (minimum is 2) */
#define MAX_RADIX 64
typedef struct {
mp_sign sign; /* sign of this quantity */
mp_size alloc; /* how many digits allocated */
mp_size used; /* how many digits used */
mp_digit *dp; /* the digits themselves */
} mp_int;
/*------------------------------------------------------------------------*/
/* Default precision */
unsigned int mp_get_prec(void);
void mp_set_prec(unsigned int prec);
/*------------------------------------------------------------------------*/
/* Memory management */
mp_err mp_init(mp_int *mp);
mp_err mp_init_array(mp_int mp[], int count);
mp_err mp_init_size(mp_int *mp, mp_size prec);
mp_err mp_init_copy(mp_int *mp, mp_int *from);
mp_err mp_copy(mp_int *from, mp_int *to);
void mp_exch(mp_int *mp1, mp_int *mp2);
void mp_clear(mp_int *mp);
void mp_clear_array(mp_int mp[], int count);
void mp_zero(mp_int *mp);
void mp_set(mp_int *mp, mp_digit d);
mp_err mp_set_int(mp_int *mp, long z);
mp_err mp_shrink(mp_int *a);
/*------------------------------------------------------------------------*/
/* Single digit arithmetic */
mp_err mp_add_d(mp_int *a, mp_digit d, mp_int *b);
mp_err mp_sub_d(mp_int *a, mp_digit d, mp_int *b);
mp_err mp_mul_d(mp_int *a, mp_digit d, mp_int *b);
mp_err mp_mul_2(mp_int *a, mp_int *c);
mp_err mp_div_d(mp_int *a, mp_digit d, mp_int *q, mp_digit *r);
mp_err mp_div_2(mp_int *a, mp_int *c);
mp_err mp_expt_d(mp_int *a, mp_digit d, mp_int *c);
/*------------------------------------------------------------------------*/
/* Sign manipulations */
mp_err mp_abs(mp_int *a, mp_int *b);
mp_err mp_neg(mp_int *a, mp_int *b);
/*------------------------------------------------------------------------*/
/* Full arithmetic */
mp_err mp_add(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_sub(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_mul(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_mul_2d(mp_int *a, mp_digit d, mp_int *c);
#if MP_SQUARE
mp_err mp_sqr(mp_int *a, mp_int *b);
#else
#define mp_sqr(a, b) mp_mul(a, a, b)
#endif
mp_err mp_div(mp_int *a, mp_int *b, mp_int *q, mp_int *r);
mp_err mp_div_2d(mp_int *a, mp_digit d, mp_int *q, mp_int *r);
mp_err mp_expt(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_2expt(mp_int *a, mp_digit k);
mp_err mp_sqrt(mp_int *a, mp_int *b);
/*------------------------------------------------------------------------*/
/* Modular arithmetic */
#if MP_MODARITH
mp_err mp_mod(mp_int *a, mp_int *m, mp_int *c);
mp_err mp_mod_d(mp_int *a, mp_digit d, mp_digit *c);
mp_err mp_addmod(mp_int *a, mp_int *b, mp_int *m, mp_int *c);
mp_err mp_submod(mp_int *a, mp_int *b, mp_int *m, mp_int *c);
mp_err mp_mulmod(mp_int *a, mp_int *b, mp_int *m, mp_int *c);
#if MP_SQUARE
mp_err mp_sqrmod(mp_int *a, mp_int *m, mp_int *c);
#else
#define mp_sqrmod(a, m, c) mp_mulmod(a, a, m, c)
#endif
mp_err mp_exptmod(mp_int *a, mp_int *b, mp_int *m, mp_int *c);
mp_err mp_exptmod_d(mp_int *a, mp_digit d, mp_int *m, mp_int *c);
#endif /* MP_MODARITH */
/*------------------------------------------------------------------------*/
/* Comparisons */
int mp_cmp_z(mp_int *a);
int mp_cmp_d(mp_int *a, mp_digit d);
int mp_cmp(mp_int *a, mp_int *b);
int mp_cmp_mag(mp_int *a, mp_int *b);
int mp_cmp_int(mp_int *a, long z);
int mp_isodd(mp_int *a);
int mp_iseven(mp_int *a);
/*------------------------------------------------------------------------*/
/* Number theoretic */
#if MP_NUMTH
mp_err mp_gcd(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_lcm(mp_int *a, mp_int *b, mp_int *c);
mp_err mp_xgcd(mp_int *a, mp_int *b, mp_int *g, mp_int *x, mp_int *y);
mp_err mp_invmod(mp_int *a, mp_int *m, mp_int *c);
#endif /* end MP_NUMTH */
/*------------------------------------------------------------------------*/
/* Input and output */
#if MP_IOFUNC
void mp_print(mp_int *mp, FILE *ofp);
#endif /* end MP_IOFUNC */
/*------------------------------------------------------------------------*/
/* Base conversion */
#define BITS 1
#define BYTES CHAR_BIT
mp_err mp_read_signed_bin(mp_int *mp, unsigned char *str, int len);
int mp_signed_bin_size(mp_int *mp);
mp_err mp_to_signed_bin(mp_int *mp, unsigned char *str);
mp_err mp_read_unsigned_bin(mp_int *mp, unsigned char *str, int len);
int mp_unsigned_bin_size(mp_int *mp);
mp_err mp_to_unsigned_bin(mp_int *mp, unsigned char *str);
int mp_count_bits(mp_int *mp);
#if MP_COMPAT_MACROS
#define mp_read_raw(mp, str, len) mp_read_signed_bin((mp), (str), (len))
#define mp_raw_size(mp) mp_signed_bin_size(mp)
#define mp_toraw(mp, str) mp_to_signed_bin((mp), (str))
#define mp_read_mag(mp, str, len) mp_read_unsigned_bin((mp), (str), (len))
#define mp_mag_size(mp) mp_unsigned_bin_size(mp)
#define mp_tomag(mp, str) mp_to_unsigned_bin((mp), (str))
#endif
mp_err mp_read_radix(mp_int *mp, unsigned char *str, int radix);
int mp_radix_size(mp_int *mp, int radix);
int mp_value_radix_size(int num, int qty, int radix);
mp_err mp_toradix(mp_int *mp, unsigned char *str, int radix);
int mp_char2value(char ch, int r);
#define mp_tobinary(M, S) mp_toradix((M), (S), 2)
#define mp_tooctal(M, S) mp_toradix((M), (S), 8)
#define mp_todecimal(M, S) mp_toradix((M), (S), 10)
#define mp_tohex(M, S) mp_toradix((M), (S), 16)
/*------------------------------------------------------------------------*/
/* Error strings */
const char *mp_strerror(mp_err ec);
#endif /* end _H_MPI_ */
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