/*
* 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 */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Sum bytes in file mod 2^16
*/
#include <stdio.h>
int
main(int argc, char **argv)
{
unsigned int sum;
int i, c;
FILE *f;
long long nbytes;
int errflg = 0;
i = 1;
do {
if (i < argc) {
if ((f = fopen(argv[i], "r")) == NULL) {
(void) fprintf(stderr,
"sum: Can't open %s\n", argv[i]);
errflg += 10;
continue;
}
} else
f = stdin;
sum = 0;
nbytes = 0;
while ((c = getc(f)) != EOF) {
nbytes++;
if (sum&01)
sum = (sum>>1) + 0x8000;
else
sum >>= 1;
sum += c;
sum &= 0xFFFF;
}
if (ferror(f)) {
errflg++;
(void) fprintf(stderr,
"sum: read error on %s\n",
argc > 1 ? argv[i] : "-");
}
(void) printf("%05u %5lld", sum,
(nbytes + BUFSIZ - 1) / BUFSIZ);
if (argc > 2)
(void) printf(" %s", argv[i]);
(void) printf("\n");
(void) fclose(f);
} while (++i < argc);
return (errflg);
}