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Annotation of OpenXM_contrib/gmp/mpz/tests/t-pow_ui.c, Revision 1.1

1.1     ! maekawa     1: /* Test mpz_pow_ui and mpz_ui_pow_ui.
        !             2:
        !             3: Copyright (C) 1997, 1999 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the GNU MP Library.
        !             6:
        !             7: The GNU MP Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Lesser General Public License as published by
        !             9: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The GNU MP Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Lesser General Public License
        !            18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include <stdio.h>
        !            23: #include "gmp.h"
        !            24: #include "gmp-impl.h"
        !            25: #include "urandom.h"
        !            26:
        !            27: void debug_mp ();
        !            28: void ref_mpz_pow_ui ();
        !            29:
        !            30: main (argc, argv)
        !            31:      int argc;
        !            32:      char **argv;
        !            33: {
        !            34:   mpz_t base;
        !            35:   mpz_t result, ref_result;
        !            36:   mp_size_t base_size;
        !            37:   unsigned long int exp;
        !            38:   int i;
        !            39:   int reps = 50000;
        !            40:
        !            41:   if (argc == 2)
        !            42:      reps = atoi (argv[1]);
        !            43:
        !            44:   mpz_init (base);
        !            45:   mpz_init (result);
        !            46:   mpz_init (ref_result);
        !            47:
        !            48:   for (i = 0; i < reps; i++)
        !            49:     {
        !            50:       base_size = urandom () % 8 - 4;
        !            51:       exp = urandom () % 16;
        !            52:
        !            53:       mpz_random2 (base, base_size);
        !            54:
        !            55:       ref_mpz_pow_ui (ref_result, base, exp);
        !            56:
        !            57:       mpz_pow_ui (result, base, exp);
        !            58:       if (mpz_cmp (result, ref_result))
        !            59:        {
        !            60:          fprintf (stderr, "ERROR (mpz_pow_ui):\n");
        !            61:          debug_mp ("      base = ", base, -16);
        !            62:          fprintf (stderr, "       exp = %lu (0x%lX)\n", exp, exp);
        !            63:          debug_mp ("    result = ", result, -16);
        !            64:          debug_mp ("ref_result = ", ref_result, -16);
        !            65:          abort ();
        !            66:        }
        !            67:
        !            68:       if (mpz_cmp_ui (base, 0L) >= 0
        !            69:          && mpz_cmp_ui (base, ~(unsigned long int) 0) <= 0)
        !            70:        {
        !            71:          mpz_ui_pow_ui (result, mpz_get_ui (base), exp);
        !            72:          if (mpz_cmp (result, ref_result))
        !            73:            {
        !            74:              fprintf (stderr, "ERROR (mpz_ui_pow_ui):\n");
        !            75:              debug_mp ("      base = ", base, -16);
        !            76:              fprintf (stderr, "       exp = %lu (0x%lX)\n", exp, exp);
        !            77:              debug_mp ("    result = ", result, -16);
        !            78:              debug_mp ("ref_result = ", ref_result, -16);
        !            79:              abort ();
        !            80:            }
        !            81:        }
        !            82:     }
        !            83:
        !            84:   exit (0);
        !            85: }
        !            86:
        !            87: void
        !            88: ref_mpz_pow_ui (w, u, e)
        !            89:      mpz_t w;
        !            90:      const mpz_t u;
        !            91:      unsigned long int e;
        !            92: {
        !            93:   mpz_t s, t;
        !            94:   unsigned long int i;
        !            95:
        !            96:   mpz_init_set_ui (t, 1);
        !            97:   mpz_init_set (s, u);
        !            98:
        !            99:   if ((e & 1) != 0)
        !           100:     mpz_mul (t, t, s);
        !           101:
        !           102:   for (i = 2; i <= e; i <<= 1)
        !           103:     {
        !           104:       mpz_mul (s, s, s);
        !           105:       if ((i & e) != 0)
        !           106:        mpz_mul (t, t, s);
        !           107:     }
        !           108:
        !           109:   mpz_set (w, t);
        !           110:   mpz_clear (s);
        !           111:   mpz_clear (t);
        !           112: }
        !           113:
        !           114: void
        !           115: debug_mp (str, x, base)
        !           116:      char *str;
        !           117:      mpz_t x;
        !           118:      int base;
        !           119: {
        !           120:   fprintf (stderr, "%s", str);
        !           121:   mpz_out_str (stderr, base, x); fputc ('\n', stderr);
        !           122: }