text: /*
   * 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  	*/
  
  /*
   * University Copyright- Copyright (c) 1982, 1986, 1988
   * The Regents of the University of California
   * All Rights Reserved
   *
   * University Acknowledgment- Portions of this document are derived from
   * software developed by the University of California, Berkeley, and its
   * contributors.
   */
  
  #pragma ident	"%Z%%M%	%I%	%E% SMI"
  
  #include <stdio.h>
  /*
   * fold - fold long lines for finite output devices
   *
   */
  
  int	fold =  80;
  
  void putch(int c);
  
  int
  main(int argc, char *argv[])
  {
  	int c;
  	FILE *f;
  	char obuf[BUFSIZ];
  
  	argc--, argv++;
  	setbuf(stdout, obuf);
  	if (argc > 0 && argv[0][0] == '-') {
  		fold = 0;
  		argv[0]++;
  		while (*argv[0] >= '0' && *argv[0] <= '9')
  			fold *= 10, fold += *argv[0]++ - '0';
  		if (*argv[0]) {
  			printf("Bad number for fold\n");
  			exit(1);
  		}
  		argc--, argv++;
  	}
  	do {
  		if (argc > 0) {
  			if (freopen(argv[0], "r", stdin) == NULL) {
  				perror(argv[0]);
  				exit(1);
  			}
  			argc--, argv++;
  		}
  		for (;;) {
  			c = getc(stdin);
  			if (c == -1)
  				break;
  			putch(c);
  		}
  	} while (argc > 0);
  	return (0);
  }
  
  int	col;
  
  void
  putch(int c)
  {
  	int ncol;
  
  	switch (c) {
  		case '\n':
  			ncol = 0;
  			break;
  		case '\t':
  			ncol = (col + 8) &~ 7;
  			break;
  		case '\b':
  			ncol = col ? col - 1 : 0;
  			break;
  		case '\r':
  			ncol = 0;
  			break;
  		default:
  			ncol = col + 1;
  	}
  	if (ncol > fold)
  		putchar('\n'), col = 0;
  	putchar(c);
  	switch (c) {
  		case '\n':
  			col = 0;
  			break;
  		case '\t':
  			col += 8;
  			col &= ~7;
  			break;
  		case '\b':
  			if (col)
  				col--;
  			break;
  		case '\r':
  			col = 0;
  			break;
  		default:
  			col++;
  			break;
  	}
  }
  