kc3-lang/gnulib/tests/test-nan-2.c

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• Hash : 3a5f5178
  Author :
  Date : 2024-05-18T21:32:01
  

  tests: Support showing all assertion failures, not just the first one.
  
  * tests/macros.h (CONTINUE_AFTER_ASSERT): New macro.
  (test_exit_status): New variable.
  (ASSERT, ASSERT_NO_STDIO): If CONTINUE_AFTER_ASSERT is 1, set
  test_exit_status instead of aborting.
  * tests/**/test-*.{c,h,cc} (main): Instead of exiting with exit code 0,
  exit with exit code test_exit_status.
  * tests/test-spawn-pipe-child.c: Undefine CONTINUE_AFTER_ASSERT.
  * tests/uninorm/test-nf*.c: Include macros.h.
  * tests/uninorm/test-u32-nf*-big.c: Likewise.
  * tests/random*.c: Define NO_MAIN_HERE.
  

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• tests/test-nan-2.c

• /* Tests of quiet not-a-number.
     Copyright (C) 2023-2024 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>, 2023.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "nan.h"
  
  #include <stdio.h>
  
  #include "fpe-trapping.h"
  
  #if HAVE_FPE_TRAPPING
  
  # include <fenv.h>
  
  # include "macros.h"
  
  float volatile resultf;
  double volatile resultd;
  long double volatile resultl;
  
  int
  main ()
  {
    /* Fetch the NaN values before we start watching out for FE_INVALID
       exceptions, because the division 0.0 / 0.0 itself also raises an
       FE_INVALID exception.
       The use of 'volatile' prevents the compiler from doing constant-folding
       optimizations on these values.  An alternative, for GCC only, would be
       the command-line option '-fsignaling-nans'.  */
    float volatile nanf = NaNf ();
    double volatile nand = NaNd ();
    long double volatile nanl = NaNl ();
  
    /* Check that the values are really quiet.  */
  
    /* Clear FE_INVALID exceptions from past operations.  */
    feclearexcept (FE_INVALID);
  
    /* An FE_INVALID exception shall trigger a SIGFPE signal, which by default
       terminates the program.  */
    if (sigfpe_on_invalid () < 0)
      {
        fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
        return 77;
      }
  
    resultf = nanf + 42.0f;
    resultd = nand + 42.0;
    resultl = nanl + 42.0L;
  
    return test_exit_status;
  }
  
  #else
  
  /* No HAVE_FPE_TRAPPING available.
     We could use the various alternative approaches from
     libgfortran/config/fpu-*.h, but that's not worth it.  */
  
  int
  main ()
  {
    fputs ("Skipping test: feenableexcept not available\n", stderr);
    return 77;
  }
  
  #endif
  

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