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67ee70e8e0
* tests/test-bsearch.c (null_bsearch, main): Remove the #if from null_bsearch because having the same condition in main is enough. Move the comment explaining the #if from null_bsearch to main. * tests/test-memccpy.c (null_memccpy, main): Likewise. * tests/test-memchr.c (null_memchr, main): Likewise. * tests/test-memcmp.c (null_memcmp, main): Likewise. * tests/test-memcpy.c (null_memcpy, main): Likewise. * tests/test-memmove.c (null_memmove, main): Likewise. * tests/test-memset.c (null_memset, main): Likewise. * tests/test-memset_explicit.c (null_memset_explicit, main): Likewise. * tests/test-qsort.c (null_qsort, main): Likewise. * tests/test-strncat.c (null_strncat, main): Likewise. * tests/test-strncmp.c (null_strncmp, main): Likewise. * tests/test-strncpy.c (null_strncpy, main): Likewise. * tests/test-strndup.c (null_strndup, main): Likewise. * tests/test-wcsncat.c (null_wcsncat, main): Likewise. * tests/test-wcsncmp.c (null_wcsncmp, main): Likewise. * tests/test-wcsncpy.c (null_wcsncpy, main): Likewise.
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/* Test of strncmp() function.
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Copyright (C) 2024-2026 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <string.h>
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#include <stddef.h>
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#include "macros.h"
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/* Test the prototype in <string.h> + compiler. */
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static int
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null_strncmp (char const *s1, char const *s2, size_t n)
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{
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int r = strncmp (s1, s2, n);
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ASSERT (s1 == NULL);
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return r;
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}
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static int (*volatile volatile_null_strncmp) (char const *, char const *,
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size_t)
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= null_strncmp;
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/* Test the library, not the compiler+library. */
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static int
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lib_strncmp (char const *s1, char const *s2, size_t n)
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{
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return strncmp (s1, s2, n);
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}
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static int (*volatile volatile_lib_strncmp) (char const *, char const *,
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size_t)
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= lib_strncmp;
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#undef strncmp
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#define strncmp volatile_lib_strncmp
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int
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main (void)
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{
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/* Test zero-length operations on NULL pointers, allowed by
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<https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3322.pdf>.
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In GCC < 15 this is a builtin that has the nonnull attribute.
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Some glibc versions use the nonnull attribute, which breaks this test. */
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#if (! defined __GNUC__ || __GNUC__ >= 15 || defined __clang__) \
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&& (! defined __GLIBC__ || 2 < __GLIBC__ + (99 <= __GLIBC_MINOR__))
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ASSERT (strncmp (NULL, "x", 0) == 0);
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ASSERT (strncmp ("x", NULL, 0) == 0);
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ASSERT (strncmp (NULL, NULL, 0) == 0);
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ASSERT (volatile_null_strncmp (NULL, "x", 0) == 0);
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#endif
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return test_exit_status;
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}
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