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/* mpc_fr_sub -- Substract a complex number from a floating-point number.
Copyright (C) 2008, 2009 INRIA
This file is part of GNU MPC.
GNU MPC is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
GNU MPC 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 Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see http://www.gnu.org/licenses/ .
*/
#include "mpc-impl.h"
/* return 0 iff both the real and imaginary parts are exact */
int
mpc_fr_sub (mpc_ptr a, mpfr_srcptr b, mpc_srcptr c, mpc_rnd_t rnd)
{
int inex_re, inex_im;
inex_re = mpfr_sub (MPC_RE(a), b, MPC_RE(c), MPC_RND_RE(rnd));
inex_im = mpfr_set (MPC_IM (a), MPC_IM (c), INV_RND (MPC_RND_IM (rnd)));
MPFR_CHANGE_SIGN (MPC_IM (a));
return MPC_INEX(inex_re, inex_im);
}
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