1/*	$OpenBSD: banner.c,v 1.13 2017/05/27 07:55:44 tedu Exp $	*/
2/*	$NetBSD: banner.c,v 1.2 1995/04/09 06:00:15 cgd Exp $	*/
3
4/*
5 *	Changes for banner(1)
6 *
7 *      @(#)Copyright (c) 1995, Simon J. Gerraty.
8 *
9 *      This is free software.  It comes with NO WARRANTY.
10 *      Permission to use, modify and distribute this source code
11 *      is granted subject to the following conditions.
12 *      1/ that the above copyright notice and this notice
13 *      are preserved in all copies and that due credit be given
14 *      to the author.
15 *      2/ that any changes to this code are clearly commented
16 *      as such so that the author does not get blamed for bugs
17 *      other than his own.
18 *
19 *      Please send copies of changes and bug-fixes to:
20 *      sjg@zen.void.oz.au
21 */
22
23/*
24 * Copyright (c) 1983, 1993
25 *	The Regents of the University of California.  All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 *    notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 *    notice, this list of conditions and the following disclaimer in the
34 *    documentation and/or other materials provided with the distribution.
35 * 3. Neither the name of the University nor the names of its contributors
36 *    may be used to endorse or promote products derived from this software
37 *    without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 */
51
52#include <stdio.h>
53#include <unistd.h>
54#include <stdlib.h>
55#include <string.h>
56#include <err.h>
57
58#include "banner.h"
59
60static long PW = LINELEN;
61
62/* the char gen code below is lifted from lpd */
63
64static char *
65scnline(int key, char *p, int c)
66{
67	int scnwidth;
68
69	/*
70	 * <sjg> lpd makes chars out of the letter in question.
71	 * the results are somewhat mixed.  Sticking to '#' as
72	 * banner(1) does is more consistent.
73	 */
74	c = '#';
75
76	for (scnwidth = WIDTH; --scnwidth;) {
77		key <<= 1;
78		*p++ = key & 0200 ? c : BACKGND;
79	}
80	return (p);
81}
82
83#define TRC(q)	(((q)-' ')&0177)
84
85
86static int
87dropit(int c)
88{
89	switch(c) {
90
91	case TRC('_'):
92	case TRC(';'):
93	case TRC(','):
94	case TRC('g'):
95	case TRC('j'):
96	case TRC('p'):
97	case TRC('q'):
98	case TRC('y'):
99		return (DROP);
100
101	default:
102		return (0);
103	}
104}
105
106static void
107scan_out(int scfd, char *scsp, int dlm)
108{
109	char *strp;
110	int nchrs, j;
111	char outbuf[LINELEN+1], *sp, c, cc;
112	int d, scnhgt;
113	extern char scnkey[][HEIGHT];	/* in lpdchar.c */
114
115	for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) {
116		strp = &outbuf[0];
117		sp = scsp;
118		for (nchrs = 0; *sp != dlm && *sp != '\0'; ) {
119			cc = *sp++;
120			if ((unsigned char)cc < ' ' ||
121			    (unsigned char)cc > 0x7f)
122				cc = INVALID;
123
124			c = TRC(cc);
125			d = dropit(c);
126			if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d))
127				for (j = WIDTH; --j;)
128					*strp++ = BACKGND;
129			else
130				strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc);
131			if (nchrs++ >= PW/(WIDTH+1)-1)
132				break;
133			*strp++ = BACKGND;
134		}
135		while (*--strp == BACKGND && strp >= outbuf)
136			;
137		strp++;
138		*strp++ = '\n';
139		(void) write(scfd, outbuf, strp-outbuf);
140	}
141}
142
143/*
144 * for each word, print up to 10 chars in big letters.
145 */
146int
147main(int argc, char *argv[])
148{
149	char word[10+1];			/* strings limited to 10 chars */
150
151	if (pledge("stdio", NULL) == -1)
152		err(1, "pledge");
153
154	while (*++argv) {
155		(void)strlcpy(word, *argv, sizeof (word));
156		scan_out(1, word, '\0');
157	}
158	exit(0);
159}
160