mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
|
/* Test the strlcat function.
|
||
|
|
Copyright (C) 2023 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 <string.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <support/check.h>
|
||
|
|
|
||
|
|
static int
|
||
|
|
do_test (void)
|
||
|
|
{
|
||
|
|
struct {
|
||
|
|
char buf1[16];
|
||
|
|
char buf2[16];
|
||
|
|
} s;
|
||
|
|
|
||
|
|
/* Nothing is written to the destination if its size is 0. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "", 0), 0);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "Hello!", 0), 6);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
/* No bytes are are modified in the target buffer if the source
|
||
|
|
string is short enough. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
strcpy (s.buf1, "He");
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "llo!", sizeof (s.buf1)), 6);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
/* A source string which fits exactly into the destination buffer is
|
||
|
|
not truncated. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
strcpy (s.buf1, "H");
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "ello, world!!!", sizeof (s.buf1)), 15);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s),
|
||
|
|
"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
/* A source string one character longer than the destination buffer
|
||
|
|
is truncated by one character. The total length is returned. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
strcpy (s.buf1, "Hello");
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, ", world!!!!", sizeof (s.buf1)), 16);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s),
|
||
|
|
"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
/* An even longer source string is truncated as well, and the total
|
||
|
|
length is returned. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
strcpy (s.buf1, "Hello,");
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, " world!!!!!!!!", sizeof (s.buf1)), 20);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s),
|
||
|
|
"Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
/* A destination string which is not NUL-terminated does not result
|
||
|
|
in any changes to the buffer. */
|
||
|
|
memset (&s, '@', sizeof (s));
|
||
|
|
memset (s.buf1, '$', sizeof (s.buf1));
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "", sizeof (s.buf1)), 16);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 32);
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "Hello!", sizeof (s.buf1)), 22);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 32);
|
||
|
|
TEST_COMPARE (strlcat (s.buf1, "Hello, world!!!!!!!!", sizeof (s.buf1)), 36);
|
||
|
|
TEST_COMPARE_BLOB (&s, sizeof (s), "$$$$$$$$$$$$$$$$@@@@@@@@@@@@@@@@", 32);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <support/test-driver.c>
|