resolv/tst-ns_samebinaryname.c

   1 /* Test the __ns_samebinaryname function.
   2    Copyright (C) 2022-2023 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 <arpa/nameser.h>
  20 #include <array_length.h>
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <support/check.h>
  24
  25 /* First character denotes the comparison group: All names with the
  26    same first character are expected to compare equal.  */
  27 static const char *const cases[] =
  28   {
  29     " ",
  30     "1\001a", "1\001A",
  31     "2\002ab", "2\002aB", "2\002Ab", "2\002AB",
  32     "3\001a\002ab", "3\001A\002ab",
  33     "w\003www\007example\003com", "w\003Www\007Example\003Com",
  34     "w\003WWW\007EXAMPLE\003COM",
  35     "W\003WWW", "W\003www",
  36   };
  37
  38 static int
  39 do_test (void)
  40 {
  41   for (int i = 0; i < array_length (cases); ++i)
  42     for (int j = 0; j < array_length (cases); ++j)
  43       {
  44         unsigned char *a = (unsigned char *) &cases[i][1];
  45         unsigned char *b = (unsigned char *) &cases[j][1];
  46         bool actual = __ns_samebinaryname (a, b);
  47         bool expected = cases[i][0] == cases[j][0];
  48         if (actual != expected)
  49           {
  50             char a1[NS_MAXDNAME];
  51             TEST_VERIFY (ns_name_ntop (a, a1, sizeof (a1)) > 0);
  52             char b1[NS_MAXDNAME];
  53             TEST_VERIFY (ns_name_ntop (b, b1, sizeof (b1)) > 0);
  54             printf ("error: \"%s\" \"%s\": expected %s\n",
  55                     a1, b1, expected ? "equal" : "unqueal");
  56             support_record_failure ();
  57           }
  58       }
  59   return 0;
  60 }
  61
  62 #include <support/test-driver.c>