/*	$OpenBSD: asa.c,v 1.8 2007/05/19 16:11:59 moritz Exp $	*/
/*	$NetBSD: asa.c,v 1.10 1995/04/21 03:01:41 cgd Exp $	*/

/*
 * Copyright (c) 1993,94 Winning Strategies, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Winning Strategies, Inc.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef lint
static char rcsid[] = "$OpenBSD: asa.c,v 1.8 2007/05/19 16:11:59 moritz Exp $";
#endif

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

void asa(FILE *);
__dead void usage(void);

int
main(int argc, char *argv[])
{
	int ch;
	FILE *fp;

	while ((ch = getopt(argc, argv, "")) != -1) {
		switch(ch) {
		default:
			usage();
			/* NOTREACHED */
		}
	}
	argc -= optind;
	argv += optind;

	if (!argc)
		asa(stdin);
	else
		for (; *argv != NULL; argv++) {
			if ((fp = fopen(*argv, "r")) == NULL) {
				warn("%s", *argv);
				continue;
			}
			asa(fp);
			fclose(fp);
		}

	exit(0);
}

void
asa(FILE *f)
{
	char *buf, *lbuf = NULL;
	size_t len;
	int firstline = 1;

	while ((buf = fgetln(f, &len)) != NULL) {
		if (buf[len - 1] == '\n')
			buf[len - 1] = '\0';
		else {
			if ((lbuf = malloc(len + 1)) == NULL)
				err(1, NULL);
			memcpy(lbuf, buf, len);
			lbuf[len] = '\0';
			buf = lbuf;
		}
		/* special case the first line  */
		if (firstline) {
			firstline = 0;
			switch (buf[0]) {
			case '0':
				putchar ('\n');
				break;
			case '1':
				putchar ('\f');
				break;
			}
		} else {
			switch (buf[0]) {
			default:
			case ' ':
				putchar ('\n');
				break;
			case '0':
				putchar ('\n');
				putchar ('\n');
				break;
			case '1':
				putchar ('\f');
				break;
			case '+':
				putchar ('\r');
				break;
			}
		}
		if (buf[0] && buf[1]) {
			fputs (&buf[1], stdout);
		}
	}
	free(lbuf);

	if (!firstline)
		putchar ('\n');
}

__dead void
usage(void)
{
	extern char *__progname;
	fprintf(stderr, "usage: %s [file ...]\n", __progname);
	exit(1);
}