297 lines
8.1 KiB
C
297 lines
8.1 KiB
C
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/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
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*/
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#include <stdio.h>
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#include <sys/param.h>
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#include <string.h> /* memset */
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#include <stdlib.h> /* rand */
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#include "databin.h"
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#if UNIT_TEST
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#include <malloc.h>
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#endif
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static char Errmsg[80];
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void
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databingen (mode, buffer, bsize, offset)
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int mode; /* either a, c, r, o, z or C */
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unsigned char *buffer; /* buffer pointer */
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int bsize; /* size of buffer */
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int offset; /* offset into the file where buffer starts */
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{
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int ind;
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switch (mode)
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{
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default:
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case 'a': /* alternating bit pattern */
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memset(buffer,0x55,bsize);
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break;
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case 'c': /* checkerboard pattern */
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memset(buffer,0xf0,bsize);
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break;
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case 'C': /* */
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for (ind=0;ind< bsize;ind++) {
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buffer[ind] = ((offset+ind)%8 & 0177);
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}
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break;
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case 'o':
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memset(buffer,0xff,bsize);
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break;
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case 'z':
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memset(buffer,0x0,bsize);
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break;
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case 'r': /* random */
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for (ind=0;ind< bsize;ind++) {
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buffer[ind] = (rand () & 0177) | 0100;
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}
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}
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}
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/***********************************************************************
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*
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* return values:
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* >= 0 : error at byte offset into the file, offset+buffer[0-(bsize-1)]
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* < 0 : no error
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***********************************************************************/
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int
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databinchk(mode, buffer, bsize, offset, errmsg)
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int mode; /* either a, c, r, z, o, or C */
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unsigned char *buffer; /* buffer pointer */
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int bsize; /* size of buffer */
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int offset; /* offset into the file where buffer starts */
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char **errmsg;
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{
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int cnt;
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unsigned char *chr;
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long expbits;
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long actbits;
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chr=buffer;
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if ( errmsg != NULL ) {
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*errmsg = Errmsg;
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}
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switch (mode)
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{
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default:
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case 'a': /* alternating bit pattern */
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expbits=0x55;
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break;
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case 'c': /* checkerboard pattern */
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expbits=0xf0;
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break;
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case 'C': /* counting pattern */
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for (cnt=0;cnt< bsize;cnt++) {
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expbits = ((offset+cnt)%8 & 0177);
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if ( buffer[cnt] != expbits ) {
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sprintf(Errmsg,
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"data mismatch at offset %d, exp:%#lo, act:%#o",
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offset+cnt, expbits, buffer[cnt]);
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return offset+cnt;
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}
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}
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sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
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return -1;
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case 'o':
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expbits=0xff;
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break;
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case 'z':
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expbits=0;
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break;
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case 'r':
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return -1; /* no check can be done for random */
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}
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for (cnt=0; cnt<bsize; chr++, cnt++) {
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actbits = (long)*chr;
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if ( actbits != expbits ) {
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sprintf(Errmsg, "data mismatch at offset %d, exp:%#lo, act:%#lo",
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offset+cnt, expbits, actbits);
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return offset+cnt;
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}
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}
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sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
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return -1; /* all ok */
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}
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#if UNIT_TEST
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/***********************************************************************
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* main for doing unit testing
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***********************************************************************/
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int
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main(ac, ag)
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int ac;
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char **ag;
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{
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int size=1023;
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int offset;
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int number;
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unsigned char *buffer;
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int ret;
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char *errmsg;
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if ((buffer=(unsigned char *)malloc(size)) == NULL ) {
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perror("malloc");
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exit(2);
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}
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printf("***** for a ****************************\n");
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databingen('a', buffer, size, 0);
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printf("databingen('a', buffer, %d, 0)\n", size);
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ret=databinchk('a', buffer, size, 0, &errmsg);
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printf("databinchk('a', buffer, %d, 0, &errmsg) returned %d: %s\n",
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size, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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offset=232400;
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ret=databinchk('a', &buffer[1], size-1, offset, &errmsg);
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printf("databinchk('a', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
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size, offset, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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buffer[15]= 0x0;
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printf("changing char 15 (offset (%d+15) = %d) to 0x0\n", offset, offset+15);
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number=offset+15;
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ret=databinchk('a', &buffer[1], size-1, offset+1, &errmsg);
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printf("databinchk('a', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
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size-1, offset+1, ret, errmsg);
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if ( ret == number )
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printf("\tPASS return value of %d as expected\n", number);
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else
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printf("\tFAIL return value %d, expected %d\n", ret, number);
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printf("***** for c ****************************\n");
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databingen('c', buffer, size, 0);
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printf("databingen('c', buffer, %d, 0)\n", size);
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ret=databinchk('c', buffer, size, 0, &errmsg);
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printf("databinchk('c', buffer, %d, 0, &errmsg) returned %d: %s\n",
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size, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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offset=232400;
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ret=databinchk('c', &buffer[1], size-1, offset, &errmsg);
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printf("databinchk('c', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
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size, offset, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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buffer[15]= 0x0;
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printf("changing char 15 (offset (%d+15) = %d) to 0x0\n", offset, offset+15);
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number=offset+15;
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ret=databinchk('c', &buffer[1], size-1, offset+1, &errmsg);
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printf("databinchk('c', &buffer[1], %d, %d, &errmsg) returned %d: %s\n",
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size-1, offset+1, ret, errmsg);
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if ( ret == number )
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printf("\tPASS return value of %d as expected\n", number);
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else
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printf("\tFAIL return value %d, expected %d\n", ret, number);
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printf("***** for C ****************************\n");
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databingen('C', buffer, size, 0);
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printf("databingen('C', buffer, %d, 0)\n", size);
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ret=databinchk('C', buffer, size, 0, &errmsg);
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printf("databinchk('C', buffer, %d, 0, &errmsg) returned %d: %s\n",
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size, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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offset=18;
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ret=databinchk('C', &buffer[18], size-18, 18, &errmsg);
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printf("databinchk('C', &buffer[18], %d, 18, &errmsg) returned %d: %s\n",
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size-18, ret, errmsg);
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if ( ret == -1 )
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printf("\tPASS return value of -1 as expected\n");
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else
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printf("\tFAIL return value %d, expected -1\n", ret);
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buffer[20]= 0x0;
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buffer[21]= 0x0;
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printf("changing char 20 and 21 to 0x0 (offset %d and %d)\n", 20,
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21);
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ret=databinchk('C', &buffer[18], size-18, 18, &errmsg);
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printf("databinchk('C', &buffer[18], %d, 18, &errmsg) returned %d: %s\n",
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size-18, ret, errmsg);
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if ( ret == 20 || ret == 21 )
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printf("\tPASS return value of %d or %d as expected\n",
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20, 21);
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else
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printf("\tFAIL return value %d, expected %d or %d\n", ret,
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20, 21 );
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exit(0);
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}
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#endif
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