1/* Test basic mbstowcs including wstring == NULL (Bug 25219).
2 Copyright (C) 2020-2022 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
23static int
24do_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 (pwcs: wout, s: 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, s: string, n: len);
45 TEST_VERIFY (result == len);
46
47 return 0;
48}
49
50#include <support/test-driver.c>
51

source code of glibc/wcsmbs/tst-mbstowcs.c