kc3-lang/gnulib/tests/test-rint.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• tests/test-rint.c

• /* Test of rint() function.
     Copyright (C) 2010-2023 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
  
  #include <config.h>
  
  #include <math.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (rint, double, (double));
  
  #include <float.h>
  #include <stdio.h>
  
  #include "isnand-nolibm.h"
  #include "minus-zero.h"
  #include "infinity.h"
  #include "nan.h"
  #include "macros.h"
  
  #undef INFINITY
  #undef NAN
  
  #define DOUBLE double
  #define ISNAN isnand
  #define INFINITY Infinityd ()
  #define NAN NaNd ()
  #define L_(literal) literal
  #define RINT rint
  #define RANDOM randomd
  #include "test-rint.h"
  
  int
  main ()
  {
    /* Consider the current rounding mode, cf.
       <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html>  */
    if (FLT_ROUNDS == 1)
      {
        /* The current rounding mode is round-to-nearest
           (the default in IEEE 754).  */
  
        /* Zero.  */
        ASSERT (rint (0.0) == 0.0);
        ASSERT (rint (minus_zerod) == 0.0);
        /* Positive numbers.  */
        ASSERT (rint (0.3) == 0.0);
        ASSERT (rint (0.5) == 0.0); /* unlike round() */
        ASSERT (rint (0.7) == 1.0);
        ASSERT (rint (1.0) == 1.0);
        ASSERT (rint (1.5) == 2.0);
        ASSERT (rint (1.999) == 2.0);
        ASSERT (rint (2.0) == 2.0);
        ASSERT (rint (2.1) == 2.0);
        ASSERT (rint (2.5) == 2.0); /* unlike round() */
        ASSERT (rint (2.7) == 3.0);
        ASSERT (rint (65535.999) == 65536.0);
        ASSERT (rint (65536.0) == 65536.0);
        ASSERT (rint (65536.001) == 65536.0);
        ASSERT (rint (2.341e31) == 2.341e31);
        /* Negative numbers.  */
        ASSERT (rint (-0.3) == 0.0);
        ASSERT (rint (-0.5) == 0.0); /* unlike round() */
        ASSERT (rint (-0.7) == -1.0);
        ASSERT (rint (-1.0) == -1.0);
        ASSERT (rint (-1.5) == -2.0);
        ASSERT (rint (-1.999) == -2.0);
        ASSERT (rint (-2.0) == -2.0);
        ASSERT (rint (-2.1) == -2.0);
        ASSERT (rint (-2.5) == -2.0); /* unlike round() */
        ASSERT (rint (-2.7) == -3.0);
        ASSERT (rint (-65535.999) == -65536.0);
        ASSERT (rint (-65536.0) == -65536.0);
        ASSERT (rint (-65536.001) == -65536.0);
        ASSERT (rint (-2.341e31) == -2.341e31);
  
        test_function ();
  
        return 0;
      }
    else
      {
        fputs ("Skipping test: non-standard rounding mode\n", stderr);
        return 77;
      }
  }
  

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