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/* $OpenBSD: strchrtest.c,v 1.2 2021/09/01 09:26:32 jasper Exp $ */
/*
* Copyright (c) 2021 Visa Hankala
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int
main(void)
{
char *buf;
size_t bufsize;
/* Allocate buffer with guard pages. */
bufsize = getpagesize();
buf = malloc(bufsize);
if (buf == NULL) {
fprintf(stderr, "unable to allocate memory\n");
return 1;
}
memset(buf, 0, bufsize);
assert(strchr(buf, 'a') == NULL);
assert(strchr(buf, '\0') == buf);
assert(strrchr(buf, 'a') == NULL);
assert(strrchr(buf, '\0') == buf);
memcpy(buf, "haystack\xcf\x80", 10);
assert(strchr(buf, 'a') == buf + 1);
assert(strchr(buf, '\x80') == buf + 9);
assert(strchr(buf, 0x180) == buf + 9);
assert(strchr(buf, '\0') == buf + 10);
assert(strrchr(buf, 'a') == buf + 5);
assert(strrchr(buf, '\xcf') == buf + 8);
assert(strrchr(buf, 0x3cf) == buf + 8);
assert(strrchr(buf, '\0') == buf + 10);
memset(buf, 'a', bufsize - 2);
buf[0] = 'b';
buf[bufsize - 2] = 'b';
assert(strchr(buf, 'b') == buf);
assert(strchr(buf, 'c') == NULL);
assert(strchr(buf, '\0') == buf + bufsize - 1);
assert(strrchr(buf, 'b') == buf + bufsize - 2);
assert(strrchr(buf, 'c') == NULL);
assert(strrchr(buf, '\0') == buf + bufsize - 1);
return 0;
}
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