pqc/external/flint-2.4.3/fq_zech.h
2014-05-24 23:16:06 +02:00

322 lines
8.7 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifndef FQ_ZECH_H
#define FQ_ZECH_H
#include "fq_nmod.h"
/* Data types and context ****************************************************/
#ifdef __cplusplus
extern "C" {
#endif
typedef struct
{
mp_limb_t value;
} fq_zech_struct;
typedef fq_zech_struct fq_zech_t[1];
typedef struct
{
mp_limb_t qm1; /* q - 1 */
mp_limb_t qm1o2; /* (q - 1) / 2 or 1 when p == 2 */
mp_limb_t qm1opm1; /* (q - 1) / (p - 1) */
mp_limb_t p;
double ppre;
mp_limb_t prime_root; /* primitive root for prime subfield */
mp_limb_t *zech_log_table;
mp_limb_t *prime_field_table;
mp_limb_t *eval_table;
fq_nmod_ctx_struct *fq_nmod_ctx;
int owns_fq_nmod_ctx;
} fq_zech_ctx_struct;
typedef fq_zech_ctx_struct fq_zech_ctx_t[1];
void fq_zech_ctx_init(fq_zech_ctx_t ctx, const fmpz_t p, slong d, const char *var);
void fq_zech_ctx_init_fq_nmod_ctx(fq_zech_ctx_t ctx, fq_nmod_ctx_t ctxn);
int _fq_zech_ctx_init_conway(fq_zech_ctx_t ctx, const fmpz_t p, slong d, const char *var);
void fq_zech_ctx_init_conway(fq_zech_ctx_t ctx, const fmpz_t p, slong d, const char *var);
void fq_zech_ctx_init_modulus(fq_zech_ctx_t ctx,
const nmod_poly_t modulus,
const char *var);
void fq_zech_ctx_randtest(fq_zech_ctx_t ctx, flint_rand_t state);
void fq_zech_ctx_clear(fq_zech_ctx_t ctx);
static __inline__ slong
fq_zech_ctx_degree(const fq_zech_ctx_t ctx)
{
return fq_nmod_ctx_degree(ctx->fq_nmod_ctx);
}
static __inline__ void
fq_zech_ctx_order(fmpz_t f, const fq_zech_ctx_t ctx)
{
fq_nmod_ctx_order(f, ctx->fq_nmod_ctx);
}
static __inline__ mp_limb_t
fq_zech_ctx_order_ui(const fq_zech_ctx_t ctx)
{
return ctx->qm1 + 1;
}
#define fq_zech_ctx_prime(ctx) fq_nmod_ctx_prime(ctx->fq_nmod_ctx)
static __inline__ int
fq_zech_ctx_fprint(FILE * file, const fq_zech_ctx_t ctx)
{
int r;
r = flint_fprintf(file, "Zech Representation:\n");
if (r <= 0)
return r;
return fq_nmod_ctx_fprint(file, ctx->fq_nmod_ctx);
}
static __inline__ void
fq_zech_ctx_print(const fq_zech_ctx_t ctx)
{
fq_zech_ctx_fprint(stdout, ctx);
}
/* Memory managment *********************************************************/
static __inline__ void
fq_zech_init(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
rop->value = ctx->qm1;
}
static __inline__ void
fq_zech_init2(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
rop->value = ctx->qm1;
}
static __inline__ void
fq_zech_clear(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
}
static __inline__ void
fq_zech_reduce(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
mp_limb_t order = fq_zech_ctx_order_ui(ctx);
if (rop->value >= order)
{
rop->value -= order;
}
}
/* Basic arithmetic **********************************************************/
void fq_zech_add(fq_zech_t rop, const fq_zech_t op1, const fq_zech_t op2,
const fq_zech_ctx_t ctx);
void fq_zech_sub(fq_zech_t rop, const fq_zech_t op1, const fq_zech_t op2,
const fq_zech_ctx_t ctx);
void fq_zech_sub_one(fq_zech_t rop, const fq_zech_t op1,
const fq_zech_ctx_t ctx);
void fq_zech_neg(fq_zech_t rop, const fq_zech_t op1, const fq_zech_ctx_t ctx);
void fq_zech_mul(fq_zech_t rop, const fq_zech_t op1, const fq_zech_t op2,
const fq_zech_ctx_t ctx);
void fq_zech_mul_fmpz(fq_zech_t rop, const fq_zech_t op, const fmpz_t x,
const fq_zech_ctx_t ctx);
void fq_zech_mul_si(fq_zech_t rop, const fq_zech_t op, slong x,
const fq_zech_ctx_t ctx);
void fq_zech_mul_ui(fq_zech_t rop, const fq_zech_t op, ulong x,
const fq_zech_ctx_t ctx);
void fq_zech_sqr(fq_zech_t rop, const fq_zech_t op, const fq_zech_ctx_t ctx);
void fq_zech_inv(fq_zech_t rop, const fq_zech_t op1, const fq_zech_ctx_t ctx);
void _fq_zech_pow(fmpz * rop, const fmpz * op, slong len, const fmpz_t e,
const fmpz * a, const slong *j, slong lena, const fmpz_t p);
void fq_zech_pow(fq_zech_t rop, const fq_zech_t op1, const fmpz_t e,
const fq_zech_ctx_t ctx);
void fq_zech_pow_ui(fq_zech_t rop, const fq_zech_t op1, const ulong e,
const fq_zech_ctx_t ctx);
void
fq_zech_pth_root(fq_zech_t rop, const fq_zech_t op1, const fq_zech_ctx_t ctx);
/* Randomisation *************************************************************/
void fq_zech_randtest(fq_zech_t rop, flint_rand_t state,
const fq_zech_ctx_t ctx);
void fq_zech_randtest_not_zero(fq_zech_t rop, flint_rand_t state,
const fq_zech_ctx_t ctx);
/* Comparison ****************************************************************/
static __inline__ int
fq_zech_equal(const fq_zech_t op1, const fq_zech_t op2, const fq_zech_ctx_t ctx)
{
return op1->value == op2->value;
}
static __inline__ int
fq_zech_is_zero(const fq_zech_t op, const fq_zech_ctx_t ctx)
{
return op->value == ctx->qm1;
}
static __inline__ int
fq_zech_is_one(const fq_zech_t op, const fq_zech_ctx_t ctx)
{
return op->value == 0;
}
/* Assignments and conversions ***********************************************/
static __inline__ void
fq_zech_set(fq_zech_t rop, const fq_zech_t op, const fq_zech_ctx_t ctx)
{
rop->value = op->value;
}
void
fq_zech_set_fmpz(fq_zech_t rop, const fmpz_t x, const fq_zech_ctx_t ctx);
static __inline__ void
fq_zech_set_ui(fq_zech_t rop, const ulong x, const fq_zech_ctx_t ctx)
{
fmpz_t xx;
fmpz_init_set_ui(xx, x);
fq_zech_set_fmpz(rop, xx, ctx);
fmpz_clear(xx);
}
static __inline__ void
fq_zech_swap(fq_zech_t op1, fq_zech_t op2, const fq_zech_ctx_t ctx)
{
slong temp;
temp = op2->value;
op2->value = op1->value;
op1->value = temp;
}
static __inline__ void
fq_zech_zero(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
rop->value = ctx->qm1;
}
static __inline__ void
fq_zech_one(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
rop->value = 0;
}
static __inline__ void
fq_zech_gen(fq_zech_t rop, const fq_zech_ctx_t ctx)
{
rop->value = 1;
}
void
fq_zech_set_fq_nmod(fq_zech_t rop, const fq_nmod_t op, const fq_zech_ctx_t ctx);
void
fq_zech_get_fq_nmod(fq_nmod_t rop, const fq_zech_t op, const fq_zech_ctx_t ctx);
/* Output ********************************************************************/
static __inline__ int
fq_zech_fprint_pretty(FILE * file, const fq_zech_t op, const fq_zech_ctx_t ctx)
{
return flint_fprintf(file, "%s^%wd", ctx->fq_nmod_ctx->var, op->value);
}
static __inline__ void
fq_zech_print_pretty(const fq_zech_t op, const fq_zech_ctx_t ctx)
{
fq_zech_fprint_pretty(stdout, op, ctx);
}
static __inline__ int
fq_zech_fprint(FILE * file, const fq_zech_t op, const fq_zech_ctx_t ctx)
{
return flint_fprintf(file, "%wd", op->value);
}
static __inline__ void
fq_zech_print(const fq_zech_t op, const fq_zech_ctx_t ctx)
{
fq_zech_fprint(stdout, op, ctx);
}
char *
fq_zech_get_str(const fq_zech_t op, const fq_zech_ctx_t ctx);
char *
fq_zech_get_str_pretty(const fq_zech_t op, const fq_zech_ctx_t ctx);
/* Special functions *********************************************************/
void fq_zech_trace(fmpz_t rop, const fq_zech_t op, const fq_zech_ctx_t ctx);
void fq_zech_frobenius(fq_zech_t rop, const fq_zech_t op, slong e,
const fq_zech_ctx_t ctx);
void fq_zech_norm(fmpz_t rop, const fq_zech_t op, const fq_zech_ctx_t ctx);
/* Bit packing ******************************************************/
void
fq_zech_bit_pack(fmpz_t f, const fq_zech_t op, mp_bitcnt_t bit_size,
const fq_zech_ctx_t ctx);
void
fq_zech_bit_unpack(fq_zech_t rop, const fmpz_t f, mp_bitcnt_t bit_size,
const fq_zech_ctx_t ctx);
#ifdef __cplusplus
}
#endif
#endif