pqc/external/flint-2.4.3/fmpz/link/fmpz_reentrant.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
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) 2009 William Hart
******************************************************************************/
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
__mpz_struct * _fmpz_new_mpz(void)
{
__mpz_struct * mpz_ptr = (__mpz_struct *) flint_malloc(sizeof(__mpz_struct));
mpz_init(mpz_ptr);
return mpz_ptr;
}
void _fmpz_clear_mpz(fmpz f)
{
mpz_clear(COEFF_TO_PTR(f));
flint_free(COEFF_TO_PTR(f));
}
void _fmpz_cleanup_mpz_content(void)
{
}
void _fmpz_cleanup(void)
{
}
__mpz_struct * _fmpz_promote(fmpz_t f)
{
if (!COEFF_IS_MPZ(*f)) /* f is small so promote it first */
{
__mpz_struct * mpz_ptr = _fmpz_new_mpz();
*f = PTR_TO_COEFF(mpz_ptr);
return mpz_ptr;
}
else /* f is large already, just return the pointer */
return COEFF_TO_PTR(*f);
}
__mpz_struct * _fmpz_promote_val(fmpz_t f)
{
fmpz c = *f;
if (!COEFF_IS_MPZ(c)) /* f is small so promote it */
{
__mpz_struct * mpz_ptr = _fmpz_new_mpz();
*f = PTR_TO_COEFF(mpz_ptr);
flint_mpz_set_si(mpz_ptr, c);
return mpz_ptr;
}
else /* f is large already, just return the pointer */
return COEFF_TO_PTR(*f);
}
void _fmpz_demote_val(fmpz_t f)
{
__mpz_struct * mpz_ptr = COEFF_TO_PTR(*f);
int size = mpz_ptr->_mp_size;
if (!(((unsigned int) size + 1U) & ~2U)) /* size +-1 */
{
ulong uval = mpz_ptr->_mp_d[0];
if (uval <= (ulong) COEFF_MAX)
{
_fmpz_clear_mpz(*f);
*f = size * (fmpz) uval;
}
}
else if (size == 0) /* value is 0 */
{
_fmpz_clear_mpz(*f);
*f = 0;
}
/* don't do anything if value has to be multi precision */
}
void _fmpz_init_readonly_mpz(fmpz_t f, const mpz_t z)
{
__mpz_struct * mpz_ptr = (__mpz_struct *) flint_malloc(sizeof(__mpz_struct));
*f = PTR_TO_COEFF(mpz_ptr);
*mpz_ptr = *z;
}
void _fmpz_clear_readonly_mpz(mpz_t z)
{
}