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Annotation of OpenXM_contrib/gmp/mpfr/tests/tround_prec.c, Revision 1.1.1.1

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: }