tests/test-mbslen.c

   1 /* Test of determining the number of multibyte characters in a string.
   2    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2024.  */
  18
  19 #include <config.h>
  20
  21 #include <string.h>
  22
  23 #include <locale.h>
  24
  25 #include "macros.h"
  26
  27 int
  28 main ()
  29 {
  30   /* configure should already have checked that the locale is supported.  */
  31   if (setlocale (LC_ALL, "") == NULL)
  32     return 1;
  33
  34   ASSERT (mbslen ("") == 0);
  35   ASSERT (mbslen ("Hello") == 5);
  36
  37   /* The following tests shows how mbslen() is different from strlen().  */
  38   ASSERT (mbslen ("\303\244\303\266") == 2); /* "äö" */
  39   ASSERT (mbslen ("7\342\202\254") == 2); /* "7€" */
  40   ASSERT (mbslen ("\360\237\220\203") == 1); /* "🐃" */
  41
  42   ASSERT (mbslen ("\303") == 1); /* invalid multibyte sequence */
  43   ASSERT (mbslen ("\342\202") == 2); /* 2x invalid multibyte sequence */
  44   ASSERT (mbslen ("\360\237\220") == 3); /* 3x invalid multibyte sequence */
  45
  46   return test_exit_status;
  47 }