49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
|
/* mpq_neg -- negate a rational.
|
||
|
|
|
||
|
|
Copyright 2000, 2001 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file is part of the GNU MP Library.
|
||
|
|
|
||
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
||
|
|
option) any later version.
|
||
|
|
|
||
|
|
The GNU MP Library 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 Lesser General Public
|
||
|
|
License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public License
|
||
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
||
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
|
|
MA 02110-1301, USA. */
|
||
|
|
|
||
|
|
#define __GMP_FORCE_mpq_neg 1
|
||
|
|
|
||
|
|
#include "gmp.h"
|
||
|
|
#include "gmp-impl.h"
|
||
|
|
|
||
|
|
|
||
|
|
void
|
||
|
|
mpq_neg (mpq_ptr dst, mpq_srcptr src)
|
||
|
|
{
|
||
|
|
mp_size_t num_size = src->_mp_num._mp_size;
|
||
|
|
|
||
|
|
if (src != dst)
|
||
|
|
{
|
||
|
|
mp_size_t num_abs_size = ABS(num_size);
|
||
|
|
mp_size_t den_size = src->_mp_den._mp_size;
|
||
|
|
|
||
|
|
MPZ_REALLOC (mpq_numref(dst), num_abs_size);
|
||
|
|
MPZ_REALLOC (mpq_denref(dst), den_size);
|
||
|
|
|
||
|
|
MPN_COPY (dst->_mp_num._mp_d, src->_mp_num._mp_d, num_abs_size);
|
||
|
|
MPN_COPY (dst->_mp_den._mp_d, src->_mp_den._mp_d, den_size);
|
||
|
|
|
||
|
|
dst->_mp_den._mp_size = den_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
dst->_mp_num._mp_size = -num_size;
|
||
|
|
}
|