112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2009 William Hart
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******************************************************************************/
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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__mpz_struct * _fmpz_new_mpz(void)
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{
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__mpz_struct * mpz_ptr = (__mpz_struct *) flint_malloc(sizeof(__mpz_struct));
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mpz_init(mpz_ptr);
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return mpz_ptr;
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}
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void _fmpz_clear_mpz(fmpz f)
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{
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mpz_clear(COEFF_TO_PTR(f));
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flint_free(COEFF_TO_PTR(f));
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}
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void _fmpz_cleanup_mpz_content(void)
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{
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}
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void _fmpz_cleanup(void)
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{
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}
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__mpz_struct * _fmpz_promote(fmpz_t f)
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{
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if (!COEFF_IS_MPZ(*f)) /* f is small so promote it first */
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{
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__mpz_struct * mpz_ptr = _fmpz_new_mpz();
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*f = PTR_TO_COEFF(mpz_ptr);
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return mpz_ptr;
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}
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else /* f is large already, just return the pointer */
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return COEFF_TO_PTR(*f);
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}
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__mpz_struct * _fmpz_promote_val(fmpz_t f)
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{
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fmpz c = *f;
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if (!COEFF_IS_MPZ(c)) /* f is small so promote it */
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{
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__mpz_struct * mpz_ptr = _fmpz_new_mpz();
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*f = PTR_TO_COEFF(mpz_ptr);
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flint_mpz_set_si(mpz_ptr, c);
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return mpz_ptr;
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}
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else /* f is large already, just return the pointer */
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return COEFF_TO_PTR(*f);
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}
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void _fmpz_demote_val(fmpz_t f)
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{
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__mpz_struct * mpz_ptr = COEFF_TO_PTR(*f);
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int size = mpz_ptr->_mp_size;
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if (!(((unsigned int) size + 1U) & ~2U)) /* size +-1 */
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{
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ulong uval = mpz_ptr->_mp_d[0];
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if (uval <= (ulong) COEFF_MAX)
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{
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_fmpz_clear_mpz(*f);
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*f = size * (fmpz) uval;
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}
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}
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else if (size == 0) /* value is 0 */
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{
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_fmpz_clear_mpz(*f);
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*f = 0;
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}
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/* don't do anything if value has to be multi precision */
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}
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void _fmpz_init_readonly_mpz(fmpz_t f, const mpz_t z)
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{
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__mpz_struct * mpz_ptr = (__mpz_struct *) flint_malloc(sizeof(__mpz_struct));
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*f = PTR_TO_COEFF(mpz_ptr);
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*mpz_ptr = *z;
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}
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void _fmpz_clear_readonly_mpz(mpz_t z)
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{
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}
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