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/*
* Copyright (C) 2010-2020 Free Software Foundation, Inc.
* Written by Eric Blake
*
* 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/>. */
#include <config.h>
#include <string.h>
#include "signature.h"
SIGNATURE_CHECK (strnlen, size_t, (char const *, size_t));
#include <stdlib.h>
#include "zerosize-ptr.h"
#include "macros.h"
int
main (void)
{
size_t i;
char *page_boundary = (char *) zerosize_ptr ();
if (!page_boundary)
{
page_boundary = malloc (0x1000);
ASSERT (page_boundary);
page_boundary += 0x1000;
}
/* Basic behavior tests. */
ASSERT (strnlen ("a", 0) == 0);
ASSERT (strnlen ("a", 1) == 1);
ASSERT (strnlen ("a", 2) == 1);
ASSERT (strnlen ("", 0x100000) == 0);
/* Memory fence and alignment testing. */
for (i = 0; i < 512; i++)
{
char *start = page_boundary - i;
size_t j = i;
memset (start, 'x', i);
do
{
if (i != j)
{
start[j] = 0;
ASSERT (strnlen (start, i + j) == j);
}
ASSERT (strnlen (start, i) == j);
ASSERT (strnlen (start, j) == j);
}
while (j--);
}
return 0;
}
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