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Annotation of OpenXM_contrib/gmp/mpq/neg.c, Revision 1.1.1.3

1.1.1.3 ! ohara       1: /* mpq_neg -- negate a rational.
1.1       maekawa     2:
1.1.1.3 ! ohara       3: Copyright 2000, 2001 Free Software Foundation, Inc.
1.1       maekawa     4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2   maekawa     8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
1.1       maekawa    10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2   maekawa    14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    15: License for more details.
                     16:
1.1.1.2   maekawa    17: You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
1.1.1.3 ! ohara      22: #define __GMP_FORCE_mpq_neg 1
        !            23:
1.1       maekawa    24: #include "gmp.h"
                     25: #include "gmp-impl.h"
                     26:
1.1.1.3 ! ohara      27:
1.1       maekawa    28: void
1.1.1.3 ! ohara      29: mpq_neg (mpq_ptr dst, mpq_srcptr src)
1.1       maekawa    30: {
1.1.1.3 ! ohara      31:   mp_size_t  num_size = src->_mp_num._mp_size;
        !            32:
        !            33:   if (src != dst)
        !            34:     {
        !            35:       mp_size_t  num_abs_size = ABS(num_size);
        !            36:       mp_size_t  den_size = src->_mp_den._mp_size;
        !            37:
        !            38:       MPZ_REALLOC (mpq_numref(dst), num_abs_size);
        !            39:       MPZ_REALLOC (mpq_denref(dst), den_size);
        !            40:
        !            41:       MPN_COPY (dst->_mp_num._mp_d, src->_mp_num._mp_d, num_abs_size);
        !            42:       MPN_COPY (dst->_mp_den._mp_d, src->_mp_den._mp_d, den_size);
        !            43:
        !            44:       dst->_mp_den._mp_size = den_size;
        !            45:     }
        !            46:
        !            47:   dst->_mp_num._mp_size = -num_size;
1.1       maekawa    48: }