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tcheck.c revision 1.1.1.3.2.1 
      1 /* Test file for mpfr_check.
      2 
      3 Copyright 2003-2004, 2006-2018 Free Software Foundation, Inc.
      4 Contributed by the AriC and Caramba projects, INRIA.
      5 
      6 This file is part of the GNU MPFR Library.
      7 
      8 The GNU MPFR Library is free software; you can redistribute it and/or modify
      9 it under the terms of the GNU Lesser General Public License as published by
     10 the Free Software Foundation; either version 3 of the License, or (at your
     11 option) any later version.
     12 
     13 The GNU MPFR Library is distributed in the hope that it will be useful, but
     14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     15 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     16 License for more details.
     17 
     18 You should have received a copy of the GNU Lesser General Public License
     19 along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
     20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
     21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
     22 
     23 #include "mpfr-test.h"
     24 
     25 #define PRINT_ERROR(s)                                                \
     26   (printf ("mpfr_check failed " s " Prec=%lu\n", (unsigned long) pr), \
     27    exit(1))
     28 
     29 int
     30 main (void)
     31 {
     32   mpfr_t a;
     33   mp_limb_t *p, tmp;
     34   mp_size_t s;
     35   mpfr_prec_t pr;
     36   int max;
     37 
     38   tests_start_mpfr ();
     39   for (pr = MPFR_PREC_MIN ; pr < 500 ; pr++)
     40     {
     41       mpfr_init2 (a, pr);
     42       if (!mpfr_check (a))
     43         PRINT_ERROR ("for init");
     44       /* Check special cases */
     45       MPFR_SET_NAN (a);
     46       if (!mpfr_check (a))
     47         PRINT_ERROR ("for nan");
     48       MPFR_SET_POS (a);
     49       MPFR_SET_INF (a);
     50       if (!mpfr_check (a))
     51         PRINT_ERROR ("for inf");
     52       MPFR_SET_ZERO (a);
     53       if (!mpfr_check (a))
     54         PRINT_ERROR ("for zero");
     55       MPFR_EXP (a) = MPFR_EXP_MIN;
     56       if (mpfr_check (a))
     57         PRINT_ERROR ("for EXP = MPFR_EXP_MIN");
     58       /* Check var */
     59       mpfr_set_ui (a, 2, MPFR_RNDN);
     60       if (!mpfr_check (a))
     61         PRINT_ERROR ("for set_ui");
     62       mpfr_clear_overflow ();
     63       max = 1000; /* Allows max 2^1000 bits for the exponent */
     64       while (!mpfr_overflow_p () && max > 0)
     65         {
     66           mpfr_mul (a, a, a, MPFR_RNDN);
     67           if (!mpfr_check (a))
     68             PRINT_ERROR ("for mul");
     69           max--;
     70         }
     71       if (max == 0)
     72         PRINT_ERROR ("can't reach overflow");
     73       mpfr_set_ui (a, 2137, MPFR_RNDN);
     74       /* Corrupt a and check for it */
     75       MPFR_SIGN (a) = 2;
     76       if (mpfr_check (a))
     77         PRINT_ERROR ("sgn");
     78       MPFR_SET_POS (a);
     79       /* Check prec */
     80       MPFR_PREC (a) = MPFR_PREC_MIN - 1;
     81       if (mpfr_check (a))  PRINT_ERROR ("precmin");
     82 #if MPFR_VERSION_MAJOR < 3
     83       /* Disable the test with MPFR >= 3 since mpfr_prec_t is now signed.
     84          The "if" below is sufficient, but the MPFR_PREC_MAX+1 generates
     85          a warning with GCC 4.4.4 even though the test is always false. */
     86       if ((mpfr_prec_t) 0 - 1 > 0)
     87         {
     88           MPFR_PREC (a) = MPFR_PREC_MAX + 1;
     89           if (mpfr_check (a))
     90             PRINT_ERROR ("precmax");
     91         }
     92 #endif
     93       MPFR_PREC (a) = pr;
     94       if (!mpfr_check (a))
     95         PRINT_ERROR ("prec");
     96       /* Check exponent */
     97       MPFR_EXP (a) = MPFR_EXP_INVALID;
     98       if (mpfr_check(a))
     99         PRINT_ERROR ("exp invalid");
    100       MPFR_EXP (a) = -MPFR_EXP_INVALID;
    101       if (mpfr_check(a))
    102         PRINT_ERROR ("-exp invalid");
    103       MPFR_EXP(a) = 0;
    104       if (!mpfr_check(a)) PRINT_ERROR ("exp 0");
    105       /* Check Mantissa */
    106       p = MPFR_MANT(a);
    107       MPFR_MANT (a) = NULL;
    108       if (mpfr_check (a))
    109         PRINT_ERROR ("Mantissa Null Ptr");
    110       MPFR_MANT (a) = p;
    111       /* Check size */
    112       s = MPFR_GET_ALLOC_SIZE (a);
    113       MPFR_SET_ALLOC_SIZE (a, 0);
    114       if (mpfr_check (a))
    115         PRINT_ERROR ("0 size");
    116       MPFR_SET_ALLOC_SIZE (a, MP_SIZE_T_MIN);
    117       if (mpfr_check (a))  PRINT_ERROR ("min size");
    118       MPFR_SET_ALLOC_SIZE (a, MPFR_LIMB_SIZE (a) - 1);
    119       if (mpfr_check (a))
    120         PRINT_ERROR ("size < prec");
    121       MPFR_SET_ALLOC_SIZE (a, s);
    122       /* Check normal form */
    123       tmp = MPFR_MANT (a)[0];
    124       if ((pr % GMP_NUMB_BITS) != 0)
    125         {
    126           MPFR_MANT(a)[0] = MPFR_LIMB_MAX;
    127           if (mpfr_check (a))
    128             PRINT_ERROR ("last bits non 0");
    129         }
    130       MPFR_MANT(a)[0] = tmp;
    131       MPFR_MANT(a)[MPFR_LIMB_SIZE(a)-1] &= MPFR_LIMB_MASK (GMP_NUMB_BITS-1);
    132       if (mpfr_check (a))
    133         PRINT_ERROR ("last bits non 0");
    134       /* Final */
    135       mpfr_set_ui (a, 2137, MPFR_RNDN);
    136       if (!mpfr_check (a))
    137         PRINT_ERROR ("after last set");
    138       mpfr_clear (a);
    139       if (mpfr_check (a))
    140         PRINT_ERROR ("after clear");
    141     }
    142   tests_end_mpfr ();
    143   return 0;
    144 }
    145