src/shared/test-tables.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2013 Zbigniew Jędrzejewski-Szmek
   4 ***/
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 typedef const char* (*lookup_t)(int);
  11 typedef int (*reverse_t)(const char*);
  12
  13 static inline void _test_table(const char *name,
  14                                lookup_t lookup,
  15                                reverse_t reverse,
  16                                int size,
  17                                bool sparse) {
  18         int i, boring = 0;
  19
  20         for (i = -1; i < size + 1; i++) {
  21                 const char* val = lookup(i);
  22                 int rev;
  23
  24                 if (val) {
  25                         rev = reverse(val);
  26                         boring = 0;
  27                 } else {
  28                         rev = reverse("--no-such--value----");
  29                         boring += i >= 0;
  30                 }
  31
  32                 if (boring < 1 || i == size)
  33                         printf("%s: %d → %s → %d\n", name, i, val, rev);
  34                 else if (boring == 1)
  35                         printf("%*s  ...\n", (int) strlen(name), "");
  36
  37                 assert_se(!(i >= 0 && i < size ?
  38                             sparse ? rev != i && rev != -1 : val == NULL || rev != i :
  39                             val != NULL || rev != -1));
  40         }
  41 }
  42
  43 #define test_table(lower, upper) \
  44         _test_table(STRINGIFY(lower), lower##_to_string, lower##_from_string, _##upper##_MAX, false)
  45
  46 #define test_table_sparse(lower, upper) \
  47         _test_table(STRINGIFY(lower), lower##_to_string, lower##_from_string, _##upper##_MAX, true)