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Member "mpfr-4.0.2/tests/ttrunc.c" (7 Jan 2019, 3208 Bytes) of package /linux/misc/mpfr-4.0.2.tar.gz:


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    1 /* Test file for mpfr_trunc, mpfr_ceil, mpfr_floor.
    2 
    3 Copyright 1999-2004, 2006-2019 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 https://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 SIZEX 100
   26 
   27 int
   28 main (void)
   29 {
   30   int j, k;
   31   mpfr_t x, y, z, t, y2, z2, t2;
   32 
   33   tests_start_mpfr ();
   34 
   35   mpfr_inits2 (SIZEX, x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
   36 
   37   mpfr_set_str1 (x, "0.5");
   38   mpfr_ceil(y, x);
   39   if (mpfr_cmp_ui (y, 1))
   40     {
   41       printf ("Error in mpfr_ceil for x=0.5: expected 1.0, got ");
   42       mpfr_dump (y);
   43       exit (1);
   44     }
   45 
   46   mpfr_set_ui (x, 0, MPFR_RNDN);
   47   mpfr_ceil(y, x);
   48   if (mpfr_cmp_ui(y,0))
   49     {
   50       printf ("Error in mpfr_ceil for x=0.0: expected 0.0, got ");
   51       mpfr_dump (y);
   52       exit (1);
   53     }
   54 
   55   mpfr_set_ui (x, 1, MPFR_RNDN);
   56   mpfr_ceil(y, x);
   57   if (mpfr_cmp_ui(y,1))
   58     {
   59       printf ("Error in mpfr_ceil for x=1.0: expected 1.0, got ");
   60       mpfr_dump (y);
   61       exit (1);
   62     }
   63 
   64   for (j=0;j<1000;j++)
   65     {
   66       mpfr_urandomb (x, RANDS);
   67       MPFR_EXP (x) = 2;
   68 
   69       for (k = 2; k <= SIZEX; k++)
   70         {
   71           mpfr_set_prec(y, k);
   72           mpfr_set_prec(y2, k);
   73           mpfr_set_prec(z, k);
   74           mpfr_set_prec(z2, k);
   75           mpfr_set_prec(t, k);
   76           mpfr_set_prec(t2, k);
   77 
   78           mpfr_floor(y, x);
   79           mpfr_set(y2, x, MPFR_RNDD);
   80 
   81           mpfr_trunc(z, x);
   82           mpfr_set(z2, x, MPFR_RNDZ);
   83 
   84           mpfr_ceil(t, x);
   85           mpfr_set(t2, x, MPFR_RNDU);
   86 
   87           if (!mpfr_eq(y, y2, k))
   88             {
   89               printf ("Error in floor, x = "); mpfr_dump (x);
   90               printf ("floor(x) = "); mpfr_dump (y);
   91               printf ("round(x, RNDD) = "); mpfr_dump (y2);
   92               exit(1);
   93             }
   94 
   95           if (!mpfr_eq(z, z2, k))
   96             {
   97               printf ("Error in trunc, x = "); mpfr_dump (x);
   98               printf ("trunc(x) = "); mpfr_dump (z);
   99               printf ("round(x, RNDZ) = "); mpfr_dump (z2);
  100               exit(1);
  101             }
  102 
  103           if (!mpfr_eq(y, y2, k))
  104             {
  105               printf ("Error in ceil, x = "); mpfr_dump (x);
  106               printf ("ceil(x) = "); mpfr_dump (t);
  107               printf ("round(x, RNDU) = "); mpfr_dump (t2);
  108               exit(1);
  109             }
  110           MPFR_EXP(x)++;
  111         }
  112     }
  113 
  114   mpfr_clears (x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
  115 
  116   tests_end_mpfr ();
  117   return 0;
  118 }