72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/* Test the strlcpy function.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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struct {
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char buf1[16];
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char buf2[16];
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} s;
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/* Nothing is written to the destination if its size is 0. */
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memset (&s, '@', sizeof (s));
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TEST_VERIFY (strlcpy (s.buf1, "Hello!", 0) == 6);
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TEST_VERIFY (memcmp (&s, "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@",
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sizeof (s)) == 0);
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TEST_VERIFY (strlcpy (NULL, "Hello!", 0) == 6);
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/* No bytes are are modified in the target buffer if the source
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string is short enough. */
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memset (&s, '@', sizeof (s));
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TEST_VERIFY (strlcpy (s.buf1, "Hello!", sizeof (s.buf1)) == 6);
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TEST_VERIFY (memcmp (&s, "Hello!\0@@@@@@@@@@@@@@@@@@@@@@@@@",
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sizeof (s)) == 0);
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/* A source string which fits exactly into the destination buffer is
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not truncated. */
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memset (&s, '@', sizeof (s));
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TEST_VERIFY (strlcpy (s.buf1, "Hello, world!!!", sizeof (s.buf1)) == 15);
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TEST_VERIFY (memcmp (&s, "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@",
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sizeof (s)) == 0);
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/* A source string one character longer than the destination buffer
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is truncated by one character. The untruncated source length is
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returned. */
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memset (&s, '@', sizeof (s));
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TEST_VERIFY (strlcpy (s.buf1, "Hello, world!!!!", sizeof (s.buf1)) == 16);
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TEST_VERIFY (memcmp (&s, "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@",
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sizeof (s)) == 0);
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/* An even longer source string is truncated as well, and the
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original length is returned. */
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memset (&s, '@', sizeof (s));
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TEST_VERIFY (strlcpy (s.buf1, "Hello, world!!!!!!!!", sizeof (s.buf1)) == 20);
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TEST_VERIFY (memcmp (&s, "Hello, world!!!\0@@@@@@@@@@@@@@@@@@@@@@@@@",
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sizeof (s)) == 0);
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return 0;
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}
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#include <support/test-driver.c>
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