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Annotation of OpenXM_contrib/gmp/mpfr/tests/tround_prec.c, Revision 1.1

1.1     ! ohara       1: /* Test file for mpfr_round_prec.
        !             2:
        !             3: Copyright 1999, 2000, 2001, 2002 Free Software Foundation.
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR 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 MPFR 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 MPFR 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 <stdlib.h>
        !            24: #include "gmp.h"
        !            25: #include "mpfr.h"
        !            26:
        !            27: int
        !            28: main (void)
        !            29: {
        !            30:    mpfr_t x;
        !            31:
        !            32:    mpfr_init2 (x, 3);
        !            33:
        !            34:    mpfr_set_ui (x, 5, GMP_RNDN);
        !            35:    mpfr_round_prec (x, GMP_RNDN, 2);
        !            36:    if (mpfr_cmp_ui(x, 4))
        !            37:      {
        !            38:        fprintf (stderr, "Error in tround: got %1.1f instead of 4\n",
        !            39:                mpfr_get_d1 (x));
        !            40:        exit (1);
        !            41:      }
        !            42:
        !            43:    /* check case when reallocation is needed */
        !            44:    mpfr_set_prec (x, 3);
        !            45:    mpfr_set_ui (x, 5, GMP_RNDN); /* exact */
        !            46:    mpfr_round_prec (x, GMP_RNDN, mp_bits_per_limb + 1);
        !            47:    if (mpfr_cmp_ui(x, 5))
        !            48:      {
        !            49:        fprintf (stderr, "Error in tround: got %1.1f instead of 5\n",
        !            50:                mpfr_get_d1 (x));
        !            51:        exit (1);
        !            52:      }
        !            53:
        !            54:    mpfr_clear(x);
        !            55:    mpfr_init2 (x, 3);
        !            56:    mpfr_set_si (x, -5, GMP_RNDN); /* exact */
        !            57:    mpfr_round_prec (x, GMP_RNDN, mp_bits_per_limb + 1);
        !            58:    if (mpfr_cmp_si(x, -5))
        !            59:      {
        !            60:        fprintf (stderr, "Error in tround: got %1.1f instead of -5\n",
        !            61:                mpfr_get_d1 (x));
        !            62:        exit (1);
        !            63:      }
        !            64:
        !            65:    /* check case when new precision needs less limbs */
        !            66:    mpfr_set_prec (x, mp_bits_per_limb + 1);
        !            67:    mpfr_set_ui (x, 5, GMP_RNDN); /* exact */
        !            68:    mpfr_round_prec (x, GMP_RNDN, 3); /* exact */
        !            69:    if (mpfr_cmp_ui(x, 5))
        !            70:      {
        !            71:        fprintf (stderr, "Error in tround: got %1.1f instead of 5\n",
        !            72:                mpfr_get_d1 (x));
        !            73:        exit (1);
        !            74:      }
        !            75:
        !            76:    mpfr_clear(x);
        !            77:
        !            78:    return 0;
        !            79: }