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/* Test the wcslcpy function.
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <wchar.h>
static int
do_test (void)
{
struct {
wchar_t buf1[16];
wchar_t buf2[16];
} s;
/* Nothing is written to the destination if its size is 0. */
wmemset (s.buf1, '@', array_length (s.buf1));
wmemset (s.buf2, '@', array_length (s.buf2));
TEST_COMPARE (wcslcpy (s.buf1, L"Hello!", 0), 6);
TEST_COMPARE_BLOB (&s, sizeof (s), L"@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
/* No bytes are are modified in the target buffer if the source
string is short enough. */
wmemset (s.buf1, '@', array_length (s.buf1));
wmemset (s.buf2, '@', array_length (s.buf2));
TEST_COMPARE (wcslcpy (s.buf1, L"Hello!", array_length (s.buf1)), 6);
TEST_COMPARE_BLOB (&s, sizeof (s),
L"Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
/* A source string which fits exactly into the destination buffer is
not truncated. */
wmemset (s.buf1, '@', array_length (s.buf1));
wmemset (s.buf2, '@', array_length (s.buf2));
TEST_COMPARE (wcslcpy (s.buf1, L"Hello, world!!!", array_length (s.buf1)),
15);
TEST_COMPARE_BLOB (&s, sizeof (s),
L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
/* A source string one character longer than the destination buffer
is truncated by one character. The untruncated source length is
returned. */
wmemset (s.buf1, '@', array_length (s.buf1));
wmemset (s.buf2, '@', array_length (s.buf2));
TEST_COMPARE (wcslcpy (s.buf1, L"Hello, world!!!!", array_length (s.buf1)),
16);
TEST_COMPARE_BLOB (&s, sizeof (s),
L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
/* An even longer source string is truncated as well, and the
original length is returned. */
wmemset (s.buf1, '@', array_length (s.buf1));
wmemset (s.buf2, '@', array_length (s.buf2));
TEST_COMPARE (wcslcpy (s.buf1, L"Hello, world!!!!!!!!",
array_length (s.buf1)), 20);
TEST_COMPARE_BLOB (&s, sizeof (s),
L"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 128);
return 0;
}
#include <support/test-driver.c>
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