56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
|
|
|
|
Copyright 2009, 2011 William Hart. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification, are
|
|
permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this list of
|
|
conditions and the following disclaimer.
|
|
|
|
2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
of conditions and the following disclaimer in the documentation and/or other materials
|
|
provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY William Hart ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL William Hart OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
The views and conclusions contained in the software and documentation are those of the
|
|
authors and should not be interpreted as representing official policies, either expressed
|
|
or implied, of William Hart.
|
|
|
|
*/
|
|
|
|
#include "gmp.h"
|
|
#include "flint.h"
|
|
#include "fft.h"
|
|
|
|
void fermat_to_mpz(mpz_t m, mp_limb_t * i, mp_size_t limbs)
|
|
{
|
|
mp_limb_signed_t hi;
|
|
|
|
mpz_realloc(m, limbs + 1);
|
|
flint_mpn_copyi(m->_mp_d, i, limbs + 1);
|
|
hi = i[limbs];
|
|
if (hi < WORD(0))
|
|
{
|
|
mpn_neg_n(m->_mp_d, m->_mp_d, limbs + 1);
|
|
m->_mp_size = limbs + 1;
|
|
while ((m->_mp_size) && (!m->_mp_d[m->_mp_size - 1]))
|
|
m->_mp_size--;
|
|
m->_mp_size = -m->_mp_size;
|
|
} else
|
|
{
|
|
m->_mp_size = limbs + 1;
|
|
while ((m->_mp_size) && (!m->_mp_d[m->_mp_size - 1]))
|
|
m->_mp_size--;
|
|
}
|
|
}
|