286 lines
6.9 KiB
C
286 lines
6.9 KiB
C
/*
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* Copyright (c) 2011 ARM Ltd
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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/* The macro LONG_TEST controls whether a short or a more comprehensive test
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of strcmp should be performed. */
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#ifdef LONG_TEST
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#ifndef BUFF_SIZE
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#define BUFF_SIZE 1024
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#endif
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#ifndef MAX_BLOCK_SIZE
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#define MAX_BLOCK_SIZE 128
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#endif
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#ifndef MAX_OFFSET
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#define MAX_OFFSET 3
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#endif
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#ifndef MAX_DIFF
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#define MAX_DIFF 8
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#endif
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#ifndef MAX_LEN
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#define MAX_LEN 8
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#endif
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#ifndef MAX_ZEROS
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#define MAX_ZEROS 8
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#endif
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#else /* not defined LONG_TEST */
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#ifndef BUFF_SIZE
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#define BUFF_SIZE 1024
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#endif
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#ifndef MAX_BLOCK_SIZE
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#define MAX_BLOCK_SIZE 64
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#endif
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#ifndef MAX_OFFSET
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#define MAX_OFFSET 3
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#endif
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#ifndef MAX_DIFF
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#define MAX_DIFF 4
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#endif
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#ifndef MAX_LEN
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#define MAX_LEN 4
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#endif
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#ifndef MAX_ZEROS
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#define MAX_ZEROS 4
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#endif
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#endif /* not defined LONG_TEST */
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#if (MAX_OFFSET >= 26)
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#error "MAX_OFFSET >= 26"
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#endif
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#if (MAX_OFFSET + MAX_BLOCK_SIZE + MAX_DIFF + MAX_LEN + MAX_ZEROS >= BUFF_SIZE)
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#error "Buffer overrun: MAX_OFFSET + MAX_BLOCK_SIZE + MAX_DIFF + MAX_LEN + MAX_ZEROS >= BUFF_SIZE."
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#endif
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#define TOO_MANY_ERRORS 11
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int errors = 0;
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const char *testname = "strcmp";
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void
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print_error (char const* msg, ...)
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{
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errors++;
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if (errors == TOO_MANY_ERRORS)
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{
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fprintf (stderr, "Too many errors.\n");
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}
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else if (errors < TOO_MANY_ERRORS)
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{
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va_list ap;
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va_start (ap, msg);
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vfprintf (stderr, msg, ap);
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va_end (ap);
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}
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else
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{
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/* Further errors omitted. */
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}
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}
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void
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printbuf (char *buf, char *name)
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{
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int i;
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printf ("\n %s=", name);
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for (i = 0; i < BUFF_SIZE; i++)
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if (buf[i] != 0)
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printf ("(%d,%c)", i, buf[i]);
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else
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printf ("(%d,%s)", i, "\\0");
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printf ("\n");
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}
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int
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main (void)
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{
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/* Allocate buffers to read and write from. */
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char src[BUFF_SIZE], dest[BUFF_SIZE];
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/* Fill the source buffer with non-null values, reproducable random data. */
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srand (1539);
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int i, j, zeros;
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unsigned sa;
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unsigned da;
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unsigned n, m, len;
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char *p;
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int ret;
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/* Make calls to strcmp with block sizes ranging between 1 and
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MAX_BLOCK_SIZE bytes, aligned and misaligned source and destination. */
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for (sa = 0; sa <= MAX_OFFSET; sa++)
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for (da = 0; da <= MAX_OFFSET; da++)
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for (n = 1; n <= MAX_BLOCK_SIZE; n++)
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{
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for (m = 1; m < n + MAX_DIFF; m++)
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for (len = 0; len < MAX_LEN; len++)
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for (zeros = 1; zeros < MAX_ZEROS; zeros++)
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{
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if (n - m > MAX_DIFF)
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continue;
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/* Make a copy of the source. */
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for (i = 0; i < BUFF_SIZE; i++)
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{
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src[i] = 'A' + (i % 26);
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dest[i] = src[i];
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}
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memcpy (dest + da, src + sa, n);
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/* Make src 0-terminated. */
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p = src + sa + n - 1;
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for (i = 0; i < zeros; i++)
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{
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*p++ = '\0';
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}
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/* Modify dest. */
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p = dest + da + m - 1;
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for (j = 0; j < len; j++)
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*p++ = 'x';
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/* Make dest 0-terminated. */
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*p = '\0';
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ret = strcmp (src + sa, dest + da);
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/* Check return value. */
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if (n == m)
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{
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if (len == 0)
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{
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if (ret != 0)
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{
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print_error ("\nFailed: after %s of %u bytes "
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"with src_align %u and dst_align %u, "
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"dest after %d bytes is modified for %d bytes, "
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"return value is %d, expected 0.\n",
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testname, n, sa, da, m, len, ret);
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}
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}
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else
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{
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if (ret >= 0)
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print_error ("\nFailed: after %s of %u bytes "
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"with src_align %u and dst_align %u, "
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"dest after %d bytes is modified for %d bytes, "
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"return value is %d, expected negative.\n",
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testname, n, sa, da, m, len, ret);
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}
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}
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else if (m > n)
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{
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if (ret >= 0)
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{
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print_error ("\nFailed: after %s of %u bytes "
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"with src_align %u and dst_align %u, "
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"dest after %d bytes is modified for %d bytes, "
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"return value is %d, expected negative.\n",
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testname, n, sa, da, m, len, ret);
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}
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}
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else /* m < n */
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{
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if (len == 0)
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{
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if (ret <= 0)
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print_error ("\nFailed: after %s of %u bytes "
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"with src_align %u and dst_align %u, "
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"dest after %d bytes is modified for %d bytes, "
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"return value is %d, expected positive.\n",
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testname, n, sa, da, m, len, ret);
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}
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else
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{
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if (ret >= 0)
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print_error ("\nFailed: after %s of %u bytes "
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"with src_align %u and dst_align %u, "
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"dest after %d bytes is modified for %d bytes, "
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"return value is %d, expected negative.\n",
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testname, n, sa, da, m, len, ret);
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}
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}
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}
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}
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/* Check some corner cases. */
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src[1] = 'A';
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dest[1] = 'A';
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src[2] = 'B';
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dest[2] = 'B';
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src[3] = 'C';
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dest[3] = 'C';
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src[4] = '\0';
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dest[4] = '\0';
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src[0] = 0xc1;
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dest[0] = 0x41;
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ret = strcmp (src, dest);
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if (ret <= 0)
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print_error ("\nFailed: expected positive, return %d\n", ret);
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src[0] = 0x01;
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dest[0] = 0x82;
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ret = strcmp (src, dest);
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if (ret >= 0)
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print_error ("\nFailed: expected negative, return %d\n", ret);
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dest[0] = src[0] = 'D';
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src[3] = 0xc1;
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dest[3] = 0x41;
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ret = strcmp (src, dest);
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if (ret <= 0)
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print_error ("\nFailed: expected positive, return %d\n", ret);
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src[3] = 0x01;
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dest[3] = 0x82;
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ret = strcmp (src, dest);
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if (ret >= 0)
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print_error ("\nFailed: expected negative, return %d\n", ret);
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printf ("\n");
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if (errors != 0)
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{
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printf ("ERROR. FAILED.\n");
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abort ();
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}
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exit (0);
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}
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