banner.c revision 1.7 
1/*	$OpenBSD: banner.c,v 1.7 2003/06/03 02:56:06 millert 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#ifndef lint
52static const char copyright[] =
53"@(#) Copyright (c) 1983, 1993\n\
54	The Regents of the University of California.  All rights reserved.\n";
55#if 0
56static char sccsid[] = "@(#)printjob.c	8.2 (Berkeley) 4/16/94";
57#else
58static const char rcsid[] = "$OpenBSD: banner.c,v 1.7 2003/06/03 02:56:06 millert Exp $";
59#endif
60#endif /* not lint */
61
62#include <stdio.h>
63#include <unistd.h>
64#include <stdlib.h>
65#include <string.h>
66
67#include "banner.h"
68
69static long PW = LINELEN;
70
71/* the char gen code below is lifted from lpd */
72
73static char *
74scnline(key, p, c)
75	int key;
76	char *p;
77	int c;
78{
79	int scnwidth;
80
81	/*
82	 * <sjg> lpd makes chars out of the letter in question.
83	 * the results are somewhat mixed.  Sticking to '#' as
84	 * banner(1) does is more consistent.
85	 */
86#ifndef NOHASH_ONLY
87	c = '#';
88#endif
89
90	for (scnwidth = WIDTH; --scnwidth;) {
91		key <<= 1;
92		*p++ = key & 0200 ? c : BACKGND;
93	}
94	return (p);
95}
96
97#define TRC(q)	(((q)-' ')&0177)
98
99
100static int
101dropit(c)
102	int c;
103{
104	switch(c) {
105
106	case TRC('_'):
107	case TRC(';'):
108	case TRC(','):
109	case TRC('g'):
110	case TRC('j'):
111	case TRC('p'):
112	case TRC('q'):
113	case TRC('y'):
114		return (DROP);
115
116	default:
117		return (0);
118	}
119}
120
121static void
122scan_out(scfd, scsp, dlm)
123	int scfd, dlm;
124	char *scsp;
125{
126	char *strp;
127	int nchrs, j;
128	char outbuf[LINELEN+1], *sp, c, cc;
129	int d, scnhgt;
130	extern char scnkey[][HEIGHT];	/* in lpdchar.c */
131
132	for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) {
133		strp = &outbuf[0];
134		sp = scsp;
135		for (nchrs = 0; *sp != dlm && *sp != '\0'; ) {
136			cc = *sp++;
137			if ((unsigned char)cc < ' ' ||
138			    (unsigned char)cc > 0x7f)
139				cc = INVALID;
140
141			c = TRC(cc);
142			d = dropit(c);
143			if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d))
144				for (j = WIDTH; --j;)
145					*strp++ = BACKGND;
146			else
147				strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc);
148			if (nchrs++ >= PW/(WIDTH+1)-1)
149				break;
150			*strp++ = BACKGND;
151#ifdef LPD_CHSET				/* <sjg> */
152			*strp++ = BACKGND;
153#endif
154		}
155		while (*--strp == BACKGND && strp >= outbuf)
156			;
157		strp++;
158		*strp++ = '\n';
159		(void) write(scfd, outbuf, strp-outbuf);
160	}
161}
162
163/*
164 * for each word, print up to 10 chars in big letters.
165 */
166int
167main(argc, argv)
168	int argc;
169	char **argv;
170{
171	char word[10+1];			/* strings limited to 10 chars */
172
173	while (*++argv) {
174		(void)strlcpy(word, *argv, sizeof (word));
175		scan_out(1, word, '\0');
176	}
177	exit(0);
178}
179