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c4fa2006ac
* tests/test-wmemcpy.c (null_wmemcpy, main): Move the #if and comment from null_wmemcpy to main to avoid invoking undefined behavior. * tests/test-wmemmove.c (null_wmemmove, main): Likewise.
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* Test of wmemmove() 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 <wchar.h>
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#include <stddef.h>
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#include "macros.h"
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/* Test the prototype in <wchar.h> + compiler. */
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static wchar_t *
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null_wmemmove (wchar_t *s1, wchar_t const *s2, size_t n)
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{
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wchar_t *p = wmemmove (s1, s2, n);
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ASSERT (s1 == NULL);
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return p;
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}
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static wchar_t *(*volatile volatile_null_wmemmove) (wchar_t *, wchar_t const *,
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size_t)
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= null_wmemmove;
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/* Test the library, not the compiler+library. */
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static wchar_t *
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lib_wmemmove (wchar_t *s1, wchar_t const *s2, size_t n)
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{
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return wmemmove (s1, s2, n);
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}
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static wchar_t *(*volatile volatile_lib_wmemmove) (wchar_t *, wchar_t const *,
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size_t)
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= lib_wmemmove;
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#undef wmemmove
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#define wmemmove volatile_lib_wmemmove
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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 mingw-w64 14.0.0, wmemmove is an inline function that calls memmove.
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In GCC < 15, memmove is a builtin that has the nonnull attribute. */
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#if ! (defined __MINGW32__ \
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&& defined __GNUC__ && !defined __clang__ && __GNUC__ < 15)
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ASSERT (wmemmove (NULL, L"x", 0) == NULL);
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{
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wchar_t y[1];
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ASSERT (wmemmove (y, NULL, 0) == y);
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}
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ASSERT (volatile_null_wmemmove (NULL, L"x", 0) == NULL);
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#endif
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return test_exit_status;
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}
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