wcsmbs/tst-mbstowcs.c

   1 /* Test basic mbstowcs including wstring == NULL (Bug 25219).
   2    Copyright (C) 2020-2021 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 <stdlib.h>
  20 #include <string.h>
  21 #include <support/check.h>
  22
  23 static int
  24 do_test (void)
  25 {
  26   char string[] = { '1', '2', '3' , '4', '5', '\0' };
  27   size_t len = strlen (string);
  28   wchar_t wstring[] = { L'1', L'2', L'3', L'4', L'5', L'\0' };
  29 #define NUM_WCHAR 6
  30   wchar_t wout[NUM_WCHAR];
  31   size_t result;
  32
  33   /* The input ASCII string in the C/POSIX locale must convert
  34      to the matching WSTRING.  */
  35   result = mbstowcs (wout, string, NUM_WCHAR);
  36   TEST_VERIFY (result == (NUM_WCHAR - 1));
  37   TEST_COMPARE_BLOB (wstring, sizeof (wchar_t) * (NUM_WCHAR - 1),
  38                      wout, sizeof (wchar_t) * result);
  39
  40   /* The input ASCII string in the C/POSIX locale must be the
  41      same length when using mbstowcs to compute the length of
  42      the string required in the conversion.  Using mbstowcs
  43      in this way is an XSI extension to POSIX.  */
  44   result = mbstowcs (NULL, string, len);
  45   TEST_VERIFY (result == len);
  46
  47   return 0;
  48 }
  49
  50 #include <support/test-driver.c>