1  /* Reporting a numeric comparison failure.
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <stdio.h>
      21  #include <support/check.h>
      22  
      23  static void
      24  report (const char *which, const char *expr, long long value, int positive,
      25          int size)
      26  {
      27    printf ("  %s: ", which);
      28    if (positive)
      29      printf ("%llu", (unsigned long long) value);
      30    else
      31      printf ("%lld", value);
      32    unsigned long long mask
      33      = (~0ULL) >> (8 * (sizeof (unsigned long long) - size));
      34    printf (" (0x%llx); from: %s\n", (unsigned long long) value & mask, expr);
      35  }
      36  
      37  void
      38  support_test_compare_failure (const char *file, int line,
      39                                const char *left_expr,
      40                                long long left_value,
      41                                int left_positive,
      42                                int left_size,
      43                                const char *right_expr,
      44                                long long right_value,
      45                                int right_positive,
      46                                int right_size)
      47  {
      48    int saved_errno = errno;
      49    support_record_failure ();
      50    if (left_size != right_size)
      51      printf ("%s:%d: numeric comparison failure (widths %d and %d)\n",
      52              file, line, left_size * 8, right_size * 8);
      53    else
      54      printf ("%s:%d: numeric comparison failure\n", file, line);
      55    report (" left", left_expr, left_value, left_positive, left_size);
      56    report ("right", right_expr, right_value, right_positive, right_size);
      57    errno = saved_errno;
      58  }