src/shared/test-tables.h

   1 /***
   2   This file is part of systemd
   3
   4   Copyright 2013 Zbigniew Jędrzejewski-Szmek
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 typedef const char* (*lookup_t)(int);
  24 typedef int (*reverse_t)(const char*);
  25
  26 static inline void _test_table(const char *name,
  27                                lookup_t lookup,
  28                                reverse_t reverse,
  29                                int size,
  30                                bool sparse) {
  31         int i;
  32
  33         for (i = -1; i < size + 1; i++) {
  34                 const char* val = lookup(i);
  35                 int rev;
  36
  37                 if (val)
  38                         rev = reverse(val);
  39                 else
  40                         rev = reverse("--no-such--value----");
  41
  42                 printf("%s: %d → %s → %d\n", name, i, val, rev);
  43                 if (i >= 0 && i < size ?
  44                     sparse ? rev != i && rev != -1 : val == NULL || rev != i :
  45                     val != NULL || rev != -1)
  46                         exit(EXIT_FAILURE);
  47         }
  48 }
  49
  50 #define test_table(lower, upper) \
  51         _test_table(STRINGIFY(lower), lower##_to_string, lower##_from_string, _##upper##_MAX, false)