contrib/mpc/src/pow_fr.c

   1 /* mpc_pow_fr -- Raise a complex number to a floating-point power.
   2
   3 Copyright (C) 2009, 2011 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 int
  24 mpc_pow_fr (mpc_ptr z, mpc_srcptr x, mpfr_srcptr y, mpc_rnd_t rnd)
  25 {
  26   mpc_t yy;
  27   int inex;
  28
  29   /* avoid copying the significand of y by copying only the struct */
  30   mpc_realref(yy)[0] = y[0];
  31   mpfr_init2 (mpc_imagref(yy), MPFR_PREC_MIN);
  32   mpfr_set_ui (mpc_imagref(yy), 0, GMP_RNDN);
  33   inex = mpc_pow (z, x, yy, rnd);
  34   mpfr_clear (mpc_imagref(yy));
  35   return inex;
  36 }
  37