2012-01-04 18:48:12 -05:00
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/*
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Copyright 2009, 2011 William Hart. All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are
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permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of
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conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list
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of conditions and the following disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY William Hart ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL William Hart OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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The views and conclusions contained in the software and documentation are those of the
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authors and should not be interpreted as representing official policies, either expressed
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or implied, of William Hart.
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*/
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#include "mpir.h"
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#include "gmp-impl.h"
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2012-01-17 10:13:24 -05:00
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void fermat_to_mpz(mpz_t m, mp_ptr i, mp_size_t limbs)
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2012-01-04 18:48:12 -05:00
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{
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mp_limb_signed_t hi;
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mpz_realloc(m, limbs + 1);
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mpn_copyi(m->_mp_d, i, limbs + 1);
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hi = i[limbs];
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if (hi < 0L)
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{
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mpn_neg_n(m->_mp_d, m->_mp_d, limbs + 1);
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m->_mp_size = limbs + 1;
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while ((m->_mp_size) && (!m->_mp_d[m->_mp_size - 1]))
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m->_mp_size--;
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m->_mp_size = -m->_mp_size;
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} else
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{
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m->_mp_size = limbs + 1;
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while ((m->_mp_size) && (!m->_mp_d[m->_mp_size - 1]))
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m->_mp_size--;
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}
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}
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