1/* mpq_neg -- negate a rational. 2 3Copyright 2000, 2001 Free Software Foundation, Inc. 4 5This file is part of the GNU MP Library. 6 7The GNU MP Library is free software; you can redistribute it and/or modify 8it under the terms of the GNU Lesser General Public License as published by 9the Free Software Foundation; either version 3 of the License, or (at your 10option) any later version. 11 12The GNU MP Library is distributed in the hope that it will be useful, but 13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15License for more details. 16 17You should have received a copy of the GNU Lesser General Public License 18along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20#define __GMP_FORCE_mpq_neg 1 21 22#include "gmp.h" 23#include "gmp-impl.h" 24 25 26void 27mpq_neg (mpq_ptr dst, mpq_srcptr src) 28{ 29 mp_size_t num_size = src->_mp_num._mp_size; 30 31 if (src != dst) 32 { 33 mp_size_t num_abs_size = ABS(num_size); 34 mp_size_t den_size = src->_mp_den._mp_size; 35 36 MPZ_REALLOC (mpq_numref(dst), num_abs_size); 37 MPZ_REALLOC (mpq_denref(dst), den_size); 38 39 MPN_COPY (dst->_mp_num._mp_d, src->_mp_num._mp_d, num_abs_size); 40 MPN_COPY (dst->_mp_den._mp_d, src->_mp_den._mp_d, den_size); 41 42 dst->_mp_den._mp_size = den_size; 43 } 44 45 dst->_mp_num._mp_size = -num_size; 46} 47