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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., 59
* Temple Place - Suite 330, Boston MA 02111-1307, 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/
*/
/************
64 bits in a Cray word
12345678901234567890123456789012
1234567890123456789012345678901234567890123456789012345678901234
________________________________________________________________
< pid >< word-offset in file (same #) >< pid >
1234567890123456789012345678901234567890123456789012345678901234
________________________________________________________________
< pid >< offset in file of this word >< pid >
8 bits to a bytes == character
NBPW 8
************/
#include <stdio.h>
#include <sys/param.h>
#ifdef UNIT_TEST
#include <unistd.h>
#include <stdlib.h>
#endif
static char Errmsg[80];
#define LOWER16BITS(X) (X & 0177777)
#define LOWER32BITS(X) (X & 0xffffffff)
/***
#define HIGHBITS(WRD, bits) ( (-1 << (64-bits)) & WRD)
#define LOWBITS(WRD, bits) ( (-1 >> (64-bits)) & WRD)
****/
#define NBPBYTE 8 /* number bits per byte */
#ifndef DEBUG
#define DEBUG 0
#endif
/***********************************************************************
*
*
* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 bytes
* 1234567890123456789012345678901234567890123456789012345678901234 bits
* ________________________________________________________________ 1 word
* < pid >< offset in file of this word >< pid >
*
* the words are put together where offset zero is the start.
* thus, offset 16 is the start of the second full word
* Thus, offset 8 is in middle of word 1
***********************************************************************/
int
datapidgen(pid, buffer, bsize, offset)
int pid;
char *buffer;
int bsize;
int offset;
{
#if CRAY
int cnt;
int tmp;
char *chr;
long *wptr;
long word;
int woff; /* file offset for the word */
int boff; /* buffer offset or index */
int num_full_words;
num_full_words = bsize/NBPW;
boff = 0;
if ( cnt=(offset % NBPW) ) { /* partial word */
woff = offset - cnt;
#if DEBUG
printf("partial at beginning, cnt = %d, woff = %d\n", cnt, woff);
#endif
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for (tmp=0; tmp<cnt; tmp++) { /* skip unused bytes */
chr++;
}
for (; boff<(NBPW-cnt) && boff<bsize; boff++, chr++) {
buffer[boff] = *chr;
}
}
/*
* full words
*/
num_full_words = (bsize-boff)/NBPW;
woff = offset+boff;
for (cnt=0; cnt<num_full_words; woff += NBPW, cnt++ ) {
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for(tmp=0; tmp<NBPW; tmp++, chr++) {
buffer[boff++] = *chr;
}
/****** Only if wptr is a word ellined
wptr = (long *)&buffer[boff];
*wptr = word;
boff += NBPW;
*****/
}
/*
* partial word at end of buffer
*/
if ( cnt=((bsize-boff) % NBPW) ) {
#if DEBUG
printf("partial at end\n");
#endif
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for (tmp=0; tmp<cnt && boff<bsize; tmp++, chr++) {
buffer[boff++] = *chr;
}
}
return bsize;
#else
return -1; /* not support on non-64 bits word machines */
#endif
}
/***********************************************************************
*
*
***********************************************************************/
int
datapidchk(pid, buffer, bsize, offset, errmsg)
int pid;
char *buffer;
int bsize;
int offset;
char **errmsg;
{
#if CRAY
int cnt;
int tmp;
char *chr;
long *wptr;
long word;
int woff; /* file offset for the word */
int boff; /* buffer offset or index */
int num_full_words;
if ( errmsg != NULL ) {
*errmsg = Errmsg;
}
num_full_words = bsize/NBPW;
boff = 0;
if ( cnt=(offset % NBPW) ) { /* partial word */
woff = offset - cnt;
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for (tmp=0; tmp<cnt; tmp++) { /* skip unused bytes */
chr++;
}
for (; boff<(NBPW-cnt) && boff<bsize; boff++, chr++) {
if (buffer[boff] != *chr) {
sprintf(Errmsg, "Data mismatch at offset %d, exp:%#o, act:%#o",
offset+boff, *chr, buffer[boff]);
return offset+boff;
}
}
}
/*
* full words
*/
num_full_words = (bsize-boff)/NBPW;
woff = offset+boff;
for (cnt=0; cnt<num_full_words; woff += NBPW, cnt++ ) {
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for(tmp=0; tmp<NBPW; tmp++, boff++, chr++) {
if ( buffer[boff] != *chr ) {
sprintf(Errmsg, "Data mismatch at offset %d, exp:%#o, act:%#o",
woff, *chr, buffer[boff]);
return woff;
}
}
/****** only if a word elined
wptr = (long *)&buffer[boff];
if ( *wptr != word ) {
sprintf(Errmsg, "Data mismatch at offset %d, exp:%#o, act:%#o",
woff, word, *wptr);
return woff;
}
boff += NBPW;
******/
}
/*
* partial word at end of buffer
*/
if ( cnt=((bsize-boff) % NBPW) ) {
#if DEBUG
printf("partial at end\n");
#endif
word = ((LOWER16BITS(pid) << 48) | (LOWER32BITS(woff) << 16) | LOWER16BITS(pid));
chr = (char *)&word;
for (tmp=0; tmp<cnt && boff<bsize; boff++, tmp++, chr++) {
if ( buffer[boff] != *chr ) {
sprintf(Errmsg, "Data mismatch at offset %d, exp:%#o, act:%#o",
offset+boff, *chr, buffer[boff]);
return offset+boff;
}
}
}
sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
return -1; /* buffer is ok */
#else
if ( errmsg != NULL ) {
*errmsg = Errmsg;
}
sprintf(Errmsg, "Not supported on this OS.");
return 0;
#endif
} /* end of datapidchk */
#if UNIT_TEST
/***********************************************************************
* main for doing unit testing
***********************************************************************/
int
main(ac, ag)
int ac;
char **ag;
{
int size=1234;
char *buffer;
int ret;
char *errmsg;
if ((buffer=(char *)malloc(size)) == NULL ) {
perror("malloc");
exit(2);
}
datapidgen(-1, buffer, size, 3);
/***
fwrite(buffer, size, 1, stdout);
fwrite("\n", 1, 1, stdout);
****/
printf("datapidgen(-1, buffer, size, 3)\n");
ret=datapidchk(-1, buffer, size, 3, &errmsg);
printf("datapidchk(-1, buffer, %d, 3, &errmsg) returned %d %s\n",
size, ret, errmsg);
ret=datapidchk(-1, &buffer[1], size-1, 4, &errmsg);
printf("datapidchk(-1, &buffer[1], %d, 4, &errmsg) returned %d %s\n",
size-1, ret, errmsg);
buffer[25]= 0x0;
buffer[26]= 0x0;
buffer[27]= 0x0;
buffer[28]= 0x0;
printf("changing char 25-28\n");
ret=datapidchk(-1, &buffer[1], size-1, 4, &errmsg);
printf("datapidchk(-1, &buffer[1], %d, 4, &errmsg) returned %d %s\n",
size-1, ret, errmsg);
printf("------------------------------------------\n");
datapidgen(getpid(), buffer, size, 5);
/*******
fwrite(buffer, size, 1, stdout);
fwrite("\n", 1, 1, stdout);
******/
printf("\ndatapidgen(getpid(), buffer, size, 5)\n");
ret=datapidchk(getpid(), buffer, size, 5, &errmsg);
printf("datapidchk(getpid(), buffer, %d, 5, &errmsg) returned %d %s\n",
size, ret, errmsg);
ret=datapidchk(getpid(), &buffer[1], size-1, 6, &errmsg);
printf("datapidchk(getpid(), &buffer[1], %d, 6, &errmsg) returned %d %s\n",
size-1, ret, errmsg);
buffer[25]= 0x0;
printf("changing char 25\n");
ret=datapidchk(getpid(), &buffer[1], size-1, 6, &errmsg);
printf("datapidchk(getpid(), &buffer[1], %d, 6, &errmsg) returned %d %s\n",
size-1, ret, errmsg);
exit(0);
}
#endif

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