1/* mpc_mul_fr -- Multiply a complex number by a floating-point number.
2
3Copyright (C) 2002, 2008, 2009, 2010, 2011 INRIA
4
5This file is part of GNU MPC.
6
7GNU MPC is free software; you can redistribute it and/or modify it under
8the terms of the GNU Lesser General Public License as published by the
9Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with this program. If not, see http://www.gnu.org/licenses/ .
19*/
20
21#include "mpc-impl.h"
22
23int
24mpc_mul_fr (mpc_ptr a, mpc_srcptr b, mpfr_srcptr c, mpc_rnd_t rnd)
25{
26  int inex_re, inex_im;
27  mpfr_t real;
28
29  if (c == mpc_realref (a))
30    /* We have to use a temporary variable. */
31    mpfr_init2 (real, MPC_PREC_RE (a));
32  else
33    real [0] = mpc_realref (a) [0];
34
35  inex_re = mpfr_mul (real, mpc_realref(b), c, MPC_RND_RE(rnd));
36  inex_im = mpfr_mul (mpc_imagref(a), mpc_imagref(b), c, MPC_RND_IM(rnd));
37  mpfr_set (mpc_realref (a), real, GMP_RNDN); /* exact */
38
39  if (c == mpc_realref (a))
40    mpfr_clear (real);
41
42  return MPC_INEX(inex_re, inex_im);
43}
44