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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*/
#include <stdio.h>
#include <sys/param.h>
#include <string.h> /* memset */
#include <stdlib.h> /* rand */
#include "databin.h"
#if UNIT_TEST
#include <stdlib.h>
#endif
static char Errmsg[80];
void databingen(int mode, char *buffer, int bsize, int offset)
{
int ind;
switch (mode) {
default:
case 'a': /* alternating bit pattern */
memset(buffer, 0x55, bsize);
break;
case 'c': /* checkerboard pattern */
memset(buffer, 0xf0, bsize);
break;
case 'C': /* */
for (ind = 0; ind < bsize; ind++)
buffer[ind] = ((offset + ind) % 8 & 0177);
break;
case 'o':
memset(buffer, 0xff, bsize);
break;
case 'z':
memset(buffer, 0x0, bsize);
break;
case 'r': /* random */
for (ind = 0; ind < bsize; ind++)
buffer[ind] = (rand() & 0177) | 0100;
}
}
/*
* return values:
* >= 0 : error at byte offset into the file, offset+buffer[0-(bsize-1)]
* < 0 : no error
*/
int databinchk(int mode, char *buffer, int bsize, int offset, char **errmsg)
{
int cnt;
unsigned char *chr;
long expbits;
long actbits;
chr = (unsigned char *)buffer;
if (errmsg != NULL)
*errmsg = Errmsg;
switch (mode) {
default:
case 'a': /* alternating bit pattern */
expbits = 0x55;
break;
case 'c': /* checkerboard pattern */
expbits = 0xf0;
break;
case 'C': /* counting pattern */
for (cnt = 0; cnt < bsize; cnt++) {
expbits = ((offset + cnt) % 8 & 0177);
if (buffer[cnt] != expbits) {
sprintf(Errmsg,
"data mismatch at offset %d, exp:%#lo, act:%#o",
offset + cnt, expbits, buffer[cnt]);
return offset + cnt;
}
}
sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
return -1;
case 'o':
expbits = 0xff;
break;
case 'z':
expbits = 0;
break;
case 'r':
return -1; /* no check can be done for random */
}
for (cnt = 0; cnt < bsize; chr++, cnt++) {
actbits = (long)*chr;
if (actbits != expbits) {
sprintf(Errmsg,
"data mismatch at offset %d, exp:%#lo, act:%#lo",
offset + cnt, expbits, actbits);
return offset + cnt;
}
}
sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
return -1;
}
#if UNIT_TEST
int main(int ac, char **ag)
{
int size = 1023;
int offset;
int number;
unsigned char *buffer;
int ret;
char *errmsg;
buffer = malloc(size);
if (buffer == NULL) {
perror("malloc");
exit(2);
}
printf("***** for a ****************************\n");
databingen('a', buffer, size, 0);
printf("databingen('a', buffer, %d, 0)\n", size);
ret = databinchk('a', buffer, size, 0, &errmsg);
printf("databinchk('a', buffer, %d, 0, &errmsg) returned %d: %s\n",
size, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
offset = 232400;
ret = databinchk('a', &buffer[1], size - 1, offset, &errmsg);
printf("databinchk('a', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
size, offset, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
buffer[15] = 0x0;
printf("changing char 15 (offset (%d+15) = %d) to 0x0\n", offset,
offset + 15);
number = offset + 15;
ret = databinchk('a', &buffer[1], size - 1, offset + 1, &errmsg);
printf("databinchk('a', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
size - 1, offset + 1, ret, errmsg);
if (ret == number)
printf("\tPASS return value of %d as expected\n", number);
else
printf("\tFAIL return value %d, expected %d\n", ret, number);
printf("***** for c ****************************\n");
databingen('c', buffer, size, 0);
printf("databingen('c', buffer, %d, 0)\n", size);
ret = databinchk('c', buffer, size, 0, &errmsg);
printf("databinchk('c', buffer, %d, 0, &errmsg) returned %d: %s\n",
size, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
offset = 232400;
ret = databinchk('c', &buffer[1], size - 1, offset, &errmsg);
printf("databinchk('c', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
size, offset, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
buffer[15] = 0x0;
printf("changing char 15 (offset (%d+15) = %d) to 0x0\n", offset,
offset + 15);
number = offset + 15;
ret = databinchk('c', &buffer[1], size - 1, offset + 1, &errmsg);
printf("databinchk('c', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
size - 1, offset + 1, ret, errmsg);
if (ret == number)
printf("\tPASS return value of %d as expected\n", number);
else
printf("\tFAIL return value %d, expected %d\n", ret, number);
printf("***** for C ****************************\n");
databingen('C', buffer, size, 0);
printf("databingen('C', buffer, %d, 0)\n", size);
ret = databinchk('C', buffer, size, 0, &errmsg);
printf("databinchk('C', buffer, %d, 0, &errmsg) returned %d: %s\n",
size, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
offset = 18;
ret = databinchk('C', &buffer[18], size - 18, 18, &errmsg);
printf
("databinchk('C', &buffer[18], %d, 18, &errmsg) returned %d: %s\n",
size - 18, ret, errmsg);
if (ret == -1)
printf("\tPASS return value of -1 as expected\n");
else
printf("\tFAIL return value %d, expected -1\n", ret);
buffer[20] = 0x0;
buffer[21] = 0x0;
printf("changing char 20 and 21 to 0x0 (offset %d and %d)\n", 20, 21);
ret = databinchk('C', &buffer[18], size - 18, 18, &errmsg);
printf("databinchk('C', &buffer[18], %d, 18, &errmsg) returned %d: %s\n",
size - 18, ret, errmsg);
if (ret == 20 || ret == 21)
printf("\tPASS return value of %d or %d as expected\n", 20, 21);
else
printf("\tFAIL return value %d, expected %d or %d\n", ret,
20, 21);
exit(0);
}
#endif
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