1 /* $OpenBSD: colcrt.c,v 1.8 2003/07/02 21:04:09 deraadt Exp $ */
2 /* $NetBSD: colcrt.c,v 1.3 1995/03/26 05:31:00 glass Exp $ */
3
4 /*
5 * Copyright (c) 1980, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #ifndef lint
34 static char copyright[] =
35 "@(#) Copyright (c) 1980, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif /* not lint */
38
39 #ifndef lint
40 #if 0
41 static char sccsid[] = "@(#)colcrt.c 8.1 (Berkeley) 6/6/93";
42 #else
43 static char rcsid[] = "$OpenBSD: colcrt.c,v 1.8 2003/07/02 21:04:09 deraadt Exp $";
44 #endif
45 #endif /* not lint */
46
47 #include <sys/types.h>
48 #include <unistd.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <stdio.h>
52 #include <err.h>
53
54 /*
55 * colcrt - replaces col for crts with new nroff esp. when using tbl.
56 * Bill Joy UCB July 14, 1977
57 *
58 * This filter uses a screen buffer, 267 half-lines by 132 columns.
59 * It interprets the up and down sequences generated by the new
60 * nroff when used with tbl and by \u \d and \r.
61 * General overstriking doesn't work correctly.
62 * Underlining is split onto multiple lines, etc.
63 *
64 * Option - suppresses all underlining.
65 * Option -2 forces printing of all half lines.
66 */
67
68 char page[267][132];
69
70 int outline = 1;
71 int outcol;
72
73 char suppresul;
74 char printall;
75
76 FILE *f;
77
78 void pflush(int);
79 int plus(char, char);
80 void move(int, int);
81
82 int
main(int argc,char * argv[])83 main(int argc, char *argv[])
84 {
85 extern char *__progname;
86 char *cp, *dp;
87 int c;
88
89 argc--;
90 argv++;
91 while (argc > 0 && argv[0][0] == '-') {
92 switch (argv[0][1]) {
93 case 0:
94 suppresul = 1;
95 break;
96 case '2':
97 printall = 1;
98 break;
99 default:
100 fprintf(stderr,
101 "usage: %s [ - ] [ -2 ] [ file ... ]\n",
102 __progname);
103 fflush(stdout);
104 exit(1);
105 }
106 argc--;
107 argv++;
108 }
109 do {
110 if (argc > 0) {
111 close(0);
112 if (!(f = fopen(argv[0], "r"))) {
113 fflush(stdout);
114 err(1, "fopen: %s", argv[0]);
115 }
116 argc--;
117 argv++;
118 }
119 for (;;) {
120 c = getc(stdin);
121 if (c == -1) {
122 pflush(outline);
123 fflush(stdout);
124 break;
125 }
126 switch (c) {
127 case '\n':
128 if (outline >= 265)
129 pflush(62);
130 outline += 2;
131 outcol = 0;
132 continue;
133 case '\016':
134 case '\017':
135 continue;
136 case 033:
137 c = getc(stdin);
138 switch (c) {
139 case '9':
140 if (outline >= 266)
141 pflush(62);
142 outline++;
143 continue;
144 case '8':
145 if (outline >= 1)
146 outline--;
147 continue;
148 case '7':
149 outline -= 2;
150 if (outline < 0)
151 outline = 0;
152 continue;
153 default:
154 continue;
155 }
156 case '\b':
157 if (outcol)
158 outcol--;
159 continue;
160 case '\t':
161 outcol += 8;
162 outcol &= ~7;
163 outcol--;
164 c = ' ';
165 default:
166 if (outcol >= 132) {
167 outcol++;
168 continue;
169 }
170 cp = &page[outline][outcol];
171 outcol++;
172 if (c == '_') {
173 if (suppresul)
174 continue;
175 cp += 132;
176 c = '-';
177 }
178 if (*cp == 0) {
179 *cp = c;
180 dp = cp - outcol;
181 for (cp--; cp >= dp && *cp == 0; cp--)
182 *cp = ' ';
183 } else
184 if (plus(c, *cp) || plus(*cp, c))
185 *cp = '+';
186 else if (*cp == ' ' || *cp == 0)
187 *cp = c;
188 continue;
189 }
190 }
191 } while (argc > 0);
192 fflush(stdout);
193 exit(0);
194 }
195
196 int
plus(char c,char d)197 plus(char c, char d)
198 {
199
200 return ((c == '|' && d == '-') || d == '_');
201 }
202
203 int first;
204
205 void
pflush(int ol)206 pflush(int ol)
207 {
208 int i;
209 char *cp;
210 char lastomit;
211 int l;
212
213 l = ol;
214 lastomit = 0;
215 if (l > 266)
216 l = 266;
217 else
218 l |= 1;
219 for (i = first | 1; i < l; i++) {
220 move(i, i - 1);
221 move(i, i + 1);
222 }
223 for (i = first; i < l; i++) {
224 cp = page[i];
225 if (printall == 0 && lastomit == 0 && *cp == 0) {
226 lastomit = 1;
227 continue;
228 }
229 lastomit = 0;
230 printf("%s\n", cp);
231 }
232 memmove(page, page[ol], (267 - ol) * 132);
233 bzero(page[267- ol], ol * 132);
234 outline -= ol;
235 outcol = 0;
236 first = 1;
237 }
238
239 void
move(int l,int m)240 move(int l, int m)
241 {
242 char *cp, *dp;
243
244 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) {
245 switch (*cp) {
246 case '|':
247 if (*dp != ' ' && *dp != '|' && *dp != 0)
248 return;
249 break;
250 case ' ':
251 break;
252 default:
253 return;
254 }
255 }
256 if (*cp == 0) {
257 for (cp = page[l], dp = page[m]; *cp; cp++, dp++)
258 if (*cp == '|')
259 *dp = '|';
260 else if (*dp == 0)
261 *dp = ' ';
262 page[l][0] = 0;
263 }
264 }
265