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/*
 * Copyright 2008-2009 Katholieke Universiteit Leuven
 *
 * Use of this software is governed by the GNU LGPLv2.1 license
 *
 * Written by Sven Verdoolaege, K.U.Leuven, Departement
 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
 */

#ifndef ISL_INT_H
#define ISL_INT_H

#include <isl/hash.h>
#include <string.h>
#include <gmp.h>
#if defined(__cplusplus)
#include <iostream>
#endif

#if defined(__cplusplus)
extern "C" {
#endif

#ifndef mp_get_memory_functions
void mp_get_memory_functions(
                void *(**alloc_func_ptr) (size_t),
                void *(**realloc_func_ptr) (void *, size_t, size_t),
                void (**free_func_ptr) (void *, size_t));
#endif

/* isl_int is the basic integer type.  It currently always corresponds
 * to a gmp mpz_t, but in the future, different types such as long long
 * or cln::cl_I will be supported.
 */
typedef mpz_t   isl_int;

#define isl_int_init(i)         mpz_init(i)
#define isl_int_clear(i)        mpz_clear(i)

#define isl_int_set(r,i)        mpz_set(r,i)
#define isl_int_set_gmp(r,i)    mpz_set(r,i)
#define isl_int_set_si(r,i)     mpz_set_si(r,i)
#define isl_int_set_ui(r,i)     mpz_set_ui(r,i)
#define isl_int_get_gmp(i,g)    mpz_set(g,i)
#define isl_int_get_si(r)       mpz_get_si(r)
#define isl_int_get_ui(r)       mpz_get_ui(r)
#define isl_int_get_d(r)        mpz_get_d(r)
#define isl_int_get_str(r)      mpz_get_str(0, 10, r)
#define isl_int_abs(r,i)        mpz_abs(r,i)
#define isl_int_neg(r,i)        mpz_neg(r,i)
#define isl_int_swap(i,j)       mpz_swap(i,j)
#define isl_int_swap_or_set(i,j)        mpz_swap(i,j)
#define isl_int_add_ui(r,i,j)   mpz_add_ui(r,i,j)
#define isl_int_sub_ui(r,i,j)   mpz_sub_ui(r,i,j)

#define isl_int_add(r,i,j)      mpz_add(r,i,j)
#define isl_int_sub(r,i,j)      mpz_sub(r,i,j)
#define isl_int_mul(r,i,j)      mpz_mul(r,i,j)
#define isl_int_mul_2exp(r,i,j) mpz_mul_2exp(r,i,j)
#define isl_int_mul_ui(r,i,j)   mpz_mul_ui(r,i,j)
#define isl_int_pow_ui(r,i,j)   mpz_pow_ui(r,i,j)
#define isl_int_addmul(r,i,j)   mpz_addmul(r,i,j)
#define isl_int_submul(r,i,j)   mpz_submul(r,i,j)

#define isl_int_gcd(r,i,j)      mpz_gcd(r,i,j)
#define isl_int_lcm(r,i,j)      mpz_lcm(r,i,j)
#define isl_int_divexact(r,i,j) mpz_divexact(r,i,j)
#define isl_int_divexact_ui(r,i,j)      mpz_divexact_ui(r,i,j)
#define isl_int_tdiv_q(r,i,j)   mpz_tdiv_q(r,i,j)
#define isl_int_cdiv_q(r,i,j)   mpz_cdiv_q(r,i,j)
#define isl_int_fdiv_q(r,i,j)   mpz_fdiv_q(r,i,j)
#define isl_int_fdiv_r(r,i,j)   mpz_fdiv_r(r,i,j)
#define isl_int_fdiv_q_ui(r,i,j)        mpz_fdiv_q_ui(r,i,j)

#define isl_int_read(r,s)       mpz_set_str(r,s,10)
typedef void (*isl_int_print_gmp_free_t)(void *, size_t);
#define isl_int_print(out,i,width)                                      \
        do {                                                            \
                char *s;                                                \
                isl_int_print_gmp_free_t gmp_free;                      \
                s = mpz_get_str(0, 10, i);                              \
                fprintf(out, "%*s", width, s);                          \
                mp_get_memory_functions(NULL, NULL, &gmp_free);         \
                (*gmp_free)(s, strlen(s)+1);                            \
        } while (0)

#define isl_int_sgn(i)          mpz_sgn(i)
#define isl_int_cmp(i,j)        mpz_cmp(i,j)
#define isl_int_cmp_si(i,si)    mpz_cmp_si(i,si)
#define isl_int_eq(i,j)         (mpz_cmp(i,j) == 0)
#define isl_int_ne(i,j)         (mpz_cmp(i,j) != 0)
#define isl_int_lt(i,j)         (mpz_cmp(i,j) < 0)
#define isl_int_le(i,j)         (mpz_cmp(i,j) <= 0)
#define isl_int_gt(i,j)         (mpz_cmp(i,j) > 0)
#define isl_int_ge(i,j)         (mpz_cmp(i,j) >= 0)
#define isl_int_abs_eq(i,j)     (mpz_cmpabs(i,j) == 0)
#define isl_int_abs_ne(i,j)     (mpz_cmpabs(i,j) != 0)
#define isl_int_abs_lt(i,j)     (mpz_cmpabs(i,j) < 0)
#define isl_int_abs_gt(i,j)     (mpz_cmpabs(i,j) > 0)
#define isl_int_abs_ge(i,j)     (mpz_cmpabs(i,j) >= 0)


#define isl_int_is_zero(i)      (isl_int_sgn(i) == 0)
#define isl_int_is_one(i)       (isl_int_cmp_si(i,1) == 0)
#define isl_int_is_negone(i)    (isl_int_cmp_si(i,-1) == 0)
#define isl_int_is_pos(i)       (isl_int_sgn(i) > 0)
#define isl_int_is_neg(i)       (isl_int_sgn(i) < 0)
#define isl_int_is_nonpos(i)    (isl_int_sgn(i) <= 0)
#define isl_int_is_nonneg(i)    (isl_int_sgn(i) >= 0)
#define isl_int_is_divisible_by(i,j)    mpz_divisible_p(i,j)

uint32_t isl_gmp_hash(mpz_t v, uint32_t hash);
#define isl_int_hash(v,h)       isl_gmp_hash(v,h)

#if defined(__cplusplus)
}
#endif

#if defined(__cplusplus)
extern "C" { typedef void (*isl_gmp_free_t)(void *, size_t); }

static inline std::ostream &operator<<(std::ostream &os, isl_int i)
{
        char *s;
        isl_gmp_free_t gmp_free;
        s = mpz_get_str(0, 10, i);
        os << s;
        mp_get_memory_functions(NULL, NULL, &gmp_free);
        (*gmp_free)(s, strlen(s)+1);
        return os;
}
#endif

#endif