/* tpow_ui -- test file for mpc_pow_ui.

Copyright (C) 2009, 2010, 2012, 2013 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 <limits.h> /* for CHAR_BIT */

#include "mpc-tests.h"

static void

compare_mpc_pow (mpfr_prec_t pmax, int iter, unsigned long nbits)

{

  mpfr_prec_t p;

  mpc_t x, y, z, t;

  unsigned long n;

  int i, inex_pow, inex_pow_ui;

  mpc_rnd_t rnd;

  mpc_init3 (y, sizeof (unsigned long) * CHAR_BIT, MPFR_PREC_MIN);

  for (p = MPFR_PREC_MIN; p <= pmax; p++)

    for (i = 0; i < iter; i++)

      {

        mpc_init2 (x, p);

        mpc_init2 (z, p);

        mpc_init2 (t, p);

        mpc_urandom (x, rands);

        n = gmp_urandomb_ui (rands, nbits); /* 0 <= n < 2^nbits */

        mpc_set_ui (y, n, MPC_RNDNN);

        for (rnd = 0; rnd < 16; rnd ++)

          {

            inex_pow = mpc_pow (z, x, y, rnd);

            inex_pow_ui = mpc_pow_ui (t, x, n, rnd);

            if (mpc_cmp (z, t) != 0)

              {

                printf ("mpc_pow and mpc_pow_ui differ for x=");

                mpc_out_str (stdout, 10, 0, x, MPC_RNDNN);

                printf (" n=%lu\n", n);

                printf ("mpc_pow gives ");

                mpc_out_str (stdout, 10, 0, z, MPC_RNDNN);

                printf ("\nmpc_pow_ui gives ");

                mpc_out_str (stdout, 10, 0, t, MPC_RNDNN);

                printf ("\n");

                exit (1);

              }

            if (inex_pow != inex_pow_ui)

              {

                printf ("mpc_pow and mpc_pow_ui give different flags for x=");

                mpc_out_str (stdout, 10, 0, x, MPC_RNDNN);

                printf (" n=%lu\n", n);

                printf ("mpc_pow gives %d\n", inex_pow);

                printf ("mpc_pow_ui gives %d\n", inex_pow_ui);

                exit (1);

              }

          }

        mpc_clear (x);

        mpc_clear (z);

        mpc_clear (t);

      }

  mpc_clear (y);

}

#define MPC_FUNCTION_CALL                                               \

  P[0].mpc_inex = mpc_pow_ui (P[1].mpc, P[2].mpc, P[3].ui, P[4].mpc_rnd)

#define MPC_FUNCTION_CALL_REUSE_OP1                                     \

  P[0].mpc_inex = mpc_pow_ui (P[1].mpc, P[1].mpc, P[3].ui, P[4].mpc_rnd)

#include "data_check.tpl"

int

main (int argc, char *argv[])

{

  mpc_t z;

  if (argc != 1)

    {

      mpfr_prec_t p;

      long int n, k;

      mpc_t res;

      if (argc != 3 && argc != 4)

        {

          printf ("Usage: tpow_ui precision exponent [k]\n");

          exit (1);

        }

      p = atoi (argv[1]);

      n = atoi (argv[2]);

      MPC_ASSERT (n >= 0);

      k = (argc > 3) ? atoi (argv[3]) : 1;

      MPC_ASSERT (k >= 0);

      mpc_init2 (z, p);

      mpc_init2 (res, p);

      mpfr_const_pi (mpc_realref (z), MPFR_RNDN);

      mpfr_div_2exp (mpc_realref (z), mpc_realref (z), 2, MPFR_RNDN);

      mpfr_const_log2 (mpc_imagref (z), MPFR_RNDN);

      while (k--)

        mpc_pow_ui (res, z, (unsigned long int) n, MPC_RNDNN);

      mpc_clear (z);

      mpc_clear (res);

      return 0;

    }

  test_start ();

  data_check_template ("pow_ui.dsc", "pow_ui.dat");

  compare_mpc_pow (100, 5, 19);

  test_end ();

  return 0;

}