Home | History | Annotate | Line # | Download | only in src 
      1 /* mpc_fr_sub -- Substract a complex number from a floating-point number.
      2 
      3 Copyright (C) 2008, 2009, 2011, 2012 INRIA
      4 
      5 This file is part of GNU MPC.
      6 
      7 GNU MPC is free software; you can redistribute it and/or modify it under
      8 the terms of the GNU Lesser General Public License as published by the
      9 Free Software Foundation; either version 3 of the License, or (at your
     10 option) any later version.
     11 
     12 GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
     13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
     14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
     15 more details.
     16 
     17 You should have received a copy of the GNU Lesser General Public License
     18 along with this program. If not, see http://www.gnu.org/licenses/ .
     19 */
     20 
     21 #include "mpc-impl.h"
     22 
     23 /* return 0 iff both the real and imaginary parts are exact */
     24 int
     25 mpc_fr_sub (mpc_ptr a, mpfr_srcptr b, mpc_srcptr c, mpc_rnd_t rnd)
     26 {
     27   int inex_re, inex_im;
     28 
     29   inex_re = mpfr_sub (mpc_realref (a), b, mpc_realref (c), MPC_RND_RE (rnd));
     30   inex_im = mpfr_neg (mpc_imagref (a), mpc_imagref (c), MPC_RND_IM (rnd));
     31 
     32   return MPC_INEX(inex_re, inex_im);
     33 }
     34