Initial source for rwtest/doio in LTP
diff --git a/lib/datapid.c b/lib/datapid.c
new file mode 100644
index 0000000..9414eae
--- /dev/null
+++ b/lib/datapid.c
@@ -0,0 +1,374 @@
+/*
+ * 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
+