1 /* Test the strlcpy function.
2 Copyright (C) 2023-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
22 #include <support/check.h>
32 /* Nothing is written to the destination if its size is 0. */
33 memset (&s
, '@', sizeof (s
));
34 TEST_COMPARE (strlcpy (s
.buf1
, "Hello!", 0), 6);
35 TEST_COMPARE_BLOB (&s
, sizeof (s
), "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
37 /* No bytes are are modified in the target buffer if the source
38 string is short enough. */
39 memset (&s
, '@', sizeof (s
));
40 TEST_COMPARE (strlcpy (s
.buf1
, "Hello!", sizeof (s
.buf1
)), 6);
41 TEST_COMPARE_BLOB (&s
, sizeof (s
), "Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
43 /* A source string which fits exactly into the destination buffer is
45 memset (&s
, '@', sizeof (s
));
46 TEST_COMPARE (strlcpy (s
.buf1
, "Hello, world!!!", sizeof (s
.buf1
)), 15);
47 TEST_COMPARE_BLOB (&s
, sizeof (s
),
48 "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
50 /* A source string one character longer than the destination buffer
51 is truncated by one character. The untruncated source length is
53 memset (&s
, '@', sizeof (s
));
54 TEST_COMPARE (strlcpy (s
.buf1
, "Hello, world!!!!", sizeof (s
.buf1
)), 16);
55 TEST_COMPARE_BLOB (&s
, sizeof (s
),
56 "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
58 /* An even longer source string is truncated as well, and the
59 original length is returned. */
60 memset (&s
, '@', sizeof (s
));
61 TEST_COMPARE (strlcpy (s
.buf1
, "Hello, world!!!!!!!!", sizeof (s
.buf1
)), 20);
62 TEST_COMPARE_BLOB (&s
, sizeof (s
),
63 "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
68 #include <support/test-driver.c>