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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Sum bytes in file mod 2^16
*/
#define WDMSK 0177777L
#define BUFSIZE 512
#include <locale.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
static void usage(void);
struct part {
short unsigned hi, lo;
};
int
main(int argc, char **argv)
{
int ca;
int i = 0;
int alg = 0;
int errflg = 0;
int c;
FILE *f;
long long nbytes;
unsigned int sum;
unsigned int lsavhi;
unsigned int lsavlo;
union hilo { /* this only works right in case short is 1/2 of long */
struct part hl;
long lg;
} tempa, suma;
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
#endif
(void) textdomain(TEXT_DOMAIN);
while ((c = getopt(argc, argv, "r")) != EOF)
switch (c) {
case 'r':
alg = 1;
break;
case '?':
usage();
}
argc -= optind;
argv = &argv[optind];
do {
if (i < argc) {
if ((f = fopen(argv[i], "r")) == NULL) {
(void) fprintf(stderr, "sum: %s ", argv[i]);
perror("");
errflg += 10;
continue;
}
} else
f = stdin;
sum = 0;
suma.lg = 0;
nbytes = 0;
if (alg == 1) {
while ((c = getc(f)) != EOF) {
nbytes++;
if (sum & 01)
sum = (sum >> 1) + 0x8000;
else
sum >>= 1;
sum += c;
sum &= 0xFFFF;
}
} else {
while ((ca = getc(f)) != EOF) {
nbytes++;
suma.lg += ca & WDMSK;
}
}
if (ferror(f)) {
errflg++;
(void) fprintf(stderr,
gettext("sum: read error on %s\n"),
(argc > 0) ? argv[i] : "-");
}
if (alg == 1)
(void) printf("%.5u %6lld", sum,
(nbytes+BUFSIZE-1)/BUFSIZE);
else {
tempa.lg = (suma.hl.lo & WDMSK) + (suma.hl.hi & WDMSK);
lsavhi = (unsigned)tempa.hl.hi;
lsavlo = (unsigned)tempa.hl.lo;
(void) printf("%u %lld", (unsigned)(lsavhi + lsavlo),
(nbytes+BUFSIZE-1)/BUFSIZE);
}
if (argc > 0)
(void) printf(" %s",
(argv[i] == (char *)0) ? "" : argv[i]);
(void) printf("\n");
(void) fclose(f);
} while (++i < argc);
return (errflg);
}
static void
usage(void)
{
(void) fprintf(stderr, gettext("usage: sum [-r] [file...]\n"));
exit(2);
}
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