1/* mpc_sub_fr -- Substract a floating-point number to the real part of a
2   complex number.
3
4Copyright (C) INRIA, 2008, 2009
5
6This file is part of the MPC Library.
7
8The MPC Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 2.1 of the License, or (at your
11option) any later version.
12
13The MPC Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the MPC Library; see the file COPYING.LIB.  If not, write to
20the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21MA 02111-1307, USA. */
22
23#include "mpc-impl.h"
24
25/* return 0 iff both the real and imaginary parts are exact */
26int
27mpc_sub_fr (mpc_ptr a, mpc_srcptr b, mpfr_srcptr c, mpc_rnd_t rnd)
28{
29  int inex_re, inex_im;
30
31  inex_re = mpfr_sub (MPC_RE(a), MPC_RE(b), c, MPC_RND_RE(rnd));
32  inex_im = mpfr_set (MPC_IM(a), MPC_IM(b), MPC_RND_IM(rnd));
33
34  return MPC_INEX(inex_re, inex_im);
35}
36