OpenXM_contrib/gmp/mpq/inv.c - diff

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version 1.1, 2000/01/10 15:35:26

version 1.1.1.3, 2003/08/25 16:06:34

Line 1

/* mpq_inv(dest,src) -- invert a rational number, i.e. set DEST to SRC

with the numerator and denominator swapped.

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 Library General Public License as published by

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation; either version 2 of the License, or (at your

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 Library General Public

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 Library General Public License

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., 59 Temple Place - Suite 330, Boston,

MA 02111-1307, USA. */

Line 24 MA 02111-1307, USA. */

#include "gmp-impl.h"

void

#if __STDC__

mpq_inv (MP_RAT *dest, const MP_RAT *src)

#else

mpq_inv (dest, src)

MP_RAT *dest;

const MP_RAT *src;

#endif

{

mp_size_t num_size = src->_mp_num._mp_size;

mp_size_t den_size = src->_mp_den._mp_size;

if (num_size == 0)

num_size = 1 / num_size; /* Divide by zero! */

DIVIDE_BY_ZERO;

if (num_size < 0)

{