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454a20c8 | 1 | /* Test the strlcpy function. |
dff8da6b | 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
454a20c8 FW |
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 <string.h> | |
20 | #include <stdlib.h> | |
21 | #include <stdio.h> | |
22 | #include <support/check.h> | |
23 | ||
24 | static int | |
25 | do_test (void) | |
26 | { | |
27 | struct { | |
28 | char buf1[16]; | |
29 | char buf2[16]; | |
30 | } s; | |
31 | ||
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); | |
36 | ||
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); | |
42 | ||
43 | /* A source string which fits exactly into the destination buffer is | |
44 | not truncated. */ | |
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); | |
49 | ||
50 | /* A source string one character longer than the destination buffer | |
51 | is truncated by one character. The untruncated source length is | |
52 | returned. */ | |
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); | |
57 | ||
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); | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | #include <support/test-driver.c> |