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/* Test of wmemcmp() function.
Copyright (C) 2008-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
#include <wchar.h>
#include "signature.h"
SIGNATURE_CHECK (wmemcmp, int, (const wchar_t *, const wchar_t *, size_t));
#include "macros.h"
int
main (int argc, char *argv[])
{
/* Test equal / not equal distinction. */
{
static const wchar_t input1[] = { 'f', 'o', 'o', 0 };
static const wchar_t input2[] = { 'f', 'o', 'o', 'b', 'a', 'r', 0 };
ASSERT (wmemcmp (input1, input2, 2) == 0);
ASSERT (wmemcmp (input1, input2, 3) == 0);
ASSERT (wmemcmp (input1, input2, 4) != 0);
}
{
static const wchar_t input1[] = { 'f', 'o', 'o', 0 };
static const wchar_t input2[] = { 'b', 'a', 'r', 0 };
ASSERT (wmemcmp (input1, input2, 1) != 0);
ASSERT (wmemcmp (input1, input2, 3) != 0);
}
/* Test less / equal / greater distinction. */
{
static const wchar_t input1[] = { 'f', 'o', 'o', 0 };
static const wchar_t input2[] = { 'm', 'o', 'o', 0 };
ASSERT (wmemcmp (input1, input2, 4) < 0);
ASSERT (wmemcmp (input2, input1, 4) > 0);
}
{
static const wchar_t input1[] = { 'o', 'o', 'm', 'p', 'h', 0 };
static const wchar_t input2[] = { 'o', 'o', 'p', 's', 0 };
ASSERT (wmemcmp (input1, input2, 3) < 0);
ASSERT (wmemcmp (input2, input1, 3) > 0);
}
{
static const wchar_t input1[] = { 'f', 'o', 'o', 0 };
static const wchar_t input2[] = { 'f', 'o', 'o', 'b', 'a', 'r', 0 };
ASSERT (wmemcmp (input1, input2, 4) < 0);
ASSERT (wmemcmp (input2, input1, 4) > 0);
}
/* ISO C requires wcscmp to work with all wchar_t values.
ISO C 17 ยง 7.29.4.4 says:
"Unless explicitly stated otherwise, the functions described in this
subclause order two wide characters the same way as two integers of
the underlying integer type designated by wchar_t." */
{
static const wchar_t input1[] = { (wchar_t) 0x76547654 };
static const wchar_t input2[] = { (wchar_t) 0x9abc9abc };
if ((wchar_t)-1 < 0)
{
/* wchar_t is signed. */
ASSERT (wmemcmp (input1, input2, 1) > 0);
ASSERT (wmemcmp (input2, input1, 1) < 0);
}
else
{
/* wchar_t is unsigned. */
ASSERT (wmemcmp (input1, input2, 1) < 0);
ASSERT (wmemcmp (input2, input1, 1) > 0);
}
}
{
static const wchar_t input1[] = { (wchar_t) 0x9abc9abc };
static const wchar_t input2[] = { (wchar_t) 0x9bdf9bdf };
ASSERT (wmemcmp (input1, input2, 1) < 0);
ASSERT (wmemcmp (input2, input1, 1) > 0);
}
return 0;
}
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