/*      $NetBSD: asa.c,v 1.11 1997/09/20 14:55:00 lukem Exp $   */
/*  $FreeBSD: src/usr.bin/asa/asa.c,v 1.6 2005/05/21 09:55:04 ru Exp $ */
/*  $DragonFly: src/usr.bin/asa/asa.c,v 1.2 2007/08/05 16:57:55 pavalos 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.
 */

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

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

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

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

        exval = 0;
        if (argc == 0)
                asa(stdin);
        else {
                while ((fn = *argv++) != NULL) {
                        if ((fp = fopen(fn, "r")) == NULL) {
                                warn("%s", fn);
                                exval = 1;
                                continue;
                        }
                        asa(fp);
                        fclose(fp);
                }
        }

        exit(exval);
}

static void
usage(void)
{

        fprintf(stderr, "usage: asa [file ...]\n");
        exit(1);
}

static void
asa(FILE *f)
{
        size_t len;
        char *buf;

        if ((buf = fgetln(f, &len)) != NULL) {
                if (buf[len - 1] == '\n')
                        buf[--len] = '\0';
                /* special case the first line */
                switch (buf[0]) {
                case '0':
                        putchar('\n');
                        break;
                case '1':
                        putchar('\f');
                        break;
                }

                if (len > 1 && buf[0] && buf[1])
                        printf("%.*s", (int)(len - 1), buf + 1);

                while ((buf = fgetln(f, &len)) != NULL) {
                        if (buf[len - 1] == '\n')
                                buf[--len] = '\0';
                        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 (len > 1 && buf[0] && buf[1])
                                printf("%.*s", (int)(len - 1), buf + 1);
                }

                putchar('\n');
        }
}