119 lines
1.9 KiB
C
119 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2002
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*
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* 01/02/2003 Port to LTP avenkat@us.ibm.com
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* 06/30/2001 Port to Linux nsharoff@us.ibm.com
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*/
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/*\
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* [Description]
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*
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* The testcase for buffer comparison by check boundary conditions.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "tst_test.h"
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#define BSIZE 4096
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#define LEN 100
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char buf[BSIZE];
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static struct test_case {
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char *p;
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char *q;
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int len;
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} tcases[] = {
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{&buf[100], &buf[800], LEN},
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{&buf[800], &buf[100], LEN},
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};
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static void fill(char *str, int len)
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{
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register int i;
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for (i = 0; i < len; i++)
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*str++ = 'a';
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}
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static void setup(void)
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{
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register int i;
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for (i = 0; i < BSIZE; i++)
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buf[i] = 0;
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return;
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}
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static void verify_memcmp(char *p, char *q, int len)
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{
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fill(p, len);
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fill(q, len);
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if (memcmp(p, q, len)) {
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tst_res(TFAIL, "memcmp fails - should have succeeded.");
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goto out;
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}
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p[len - 1] = 0;
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if (memcmp(p, q, len) >= 0) {
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tst_res(TFAIL, "memcmp succeeded - should have failed.");
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goto out;
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};
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p[len - 1] = 'a';
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p[0] = 0;
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if (memcmp(p, q, len) >= 0) {
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tst_res(TFAIL, "memcmp succeeded - should have failed.");
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goto out;
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};
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p[0] = 'a';
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q[len - 1] = 0;
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if (memcmp(p, q, len) <= 0) {
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tst_res(TFAIL, "memcmp succeeded - should have failed.");
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goto out;
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};
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q[len - 1] = 'a';
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q[0] = 0;
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if (memcmp(p, q, len) <= 0) {
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tst_res(TFAIL, "memcmp succeeded - should have failed.");
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goto out;
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};
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q[0] = 'a';
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if (memcmp(p, q, len)) {
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tst_res(TFAIL, "memcmp fails - should have succeeded.");
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goto out;
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}
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tst_res(TPASS, "Test passed");
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out:
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return;
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}
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static void run_test(unsigned int nr)
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{
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struct test_case *tc = &tcases[nr];
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verify_memcmp(tc->p, tc->q, tc->len);
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return;
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.test = run_test,
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};
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