1 /*
2 * Copyright (c) 1980 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifndef lint
35 char copyright[] =
36 "@(#) Copyright (c) 1980 The Regents of the University of California.\n\
37 All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static char sccsid[] = "@(#)colcrt.c 5.4 (Berkeley) 6/1/90";
42 #endif /* not lint */
43
44 #include <stdio.h>
45 /*
46 * colcrt - replaces col for crts with new nroff esp. when using tbl.
47 * Bill Joy UCB July 14, 1977
48 *
49 * This filter uses a screen buffer, 267 half-lines by 132 columns.
50 * It interprets the up and down sequences generated by the new
51 * nroff when used with tbl and by \u \d and \r.
52 * General overstriking doesn't work correctly.
53 * Underlining is split onto multiple lines, etc.
54 *
55 * Option - suppresses all underlining.
56 * Option -2 forces printing of all half lines.
57 */
58
59 char page[267][132];
60
61 int outline = 1;
62 int outcol;
63
64 char suppresul;
65 char printall;
66
67 char *progname;
68 FILE *f;
69
main(argc,argv)70 main(argc, argv)
71 int argc;
72 char *argv[];
73 {
74 register c;
75 register char *cp, *dp;
76
77 argc--;
78 progname = *argv++;
79 while (argc > 0 && argv[0][0] == '-') {
80 switch (argv[0][1]) {
81 case 0:
82 suppresul = 1;
83 break;
84 case '2':
85 printall = 1;
86 break;
87 default:
88 printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname);
89 fflush(stdout);
90 exit(1);
91 }
92 argc--;
93 argv++;
94 }
95 do {
96 if (argc > 0) {
97 close(0);
98 if (!(f = fopen(argv[0], "r"))) {
99 fflush(stdout);
100 perror(argv[0]);
101 exit (1);
102 }
103 argc--;
104 argv++;
105 }
106 for (;;) {
107 c = getc(stdin);
108 if (c == -1) {
109 pflush(outline);
110 fflush(stdout);
111 break;
112 }
113 switch (c) {
114 case '\n':
115 if (outline >= 265)
116 pflush(62);
117 outline += 2;
118 outcol = 0;
119 continue;
120 case '\016':
121 case '\017':
122 continue;
123 case 033:
124 c = getc(stdin);
125 switch (c) {
126 case '9':
127 if (outline >= 266)
128 pflush(62);
129 outline++;
130 continue;
131 case '8':
132 if (outline >= 1)
133 outline--;
134 continue;
135 case '7':
136 outline -= 2;
137 if (outline < 0)
138 outline = 0;
139 continue;
140 default:
141 continue;
142 }
143 case '\b':
144 if (outcol)
145 outcol--;
146 continue;
147 case '\t':
148 outcol += 8;
149 outcol &= ~7;
150 outcol--;
151 c = ' ';
152 default:
153 if (outcol >= 132) {
154 outcol++;
155 continue;
156 }
157 cp = &page[outline][outcol];
158 outcol++;
159 if (c == '_') {
160 if (suppresul)
161 continue;
162 cp += 132;
163 c = '-';
164 }
165 if (*cp == 0) {
166 *cp = c;
167 dp = cp - outcol;
168 for (cp--; cp >= dp && *cp == 0; cp--)
169 *cp = ' ';
170 } else
171 if (plus(c, *cp) || plus(*cp, c))
172 *cp = '+';
173 else if (*cp == ' ' || *cp == 0)
174 *cp = c;
175 continue;
176 }
177 }
178 } while (argc > 0);
179 fflush(stdout);
180 exit(0);
181 }
182
plus(c,d)183 plus(c, d)
184 char c, d;
185 {
186
187 return (c == '|' && d == '-' || d == '_');
188 }
189
190 int first;
191
pflush(ol)192 pflush(ol)
193 int ol;
194 {
195 register int i, j;
196 register char *cp;
197 char lastomit;
198 int l;
199
200 l = ol;
201 lastomit = 0;
202 if (l > 266)
203 l = 266;
204 else
205 l |= 1;
206 for (i = first | 1; i < l; i++) {
207 move(i, i - 1);
208 move(i, i + 1);
209 }
210 for (i = first; i < l; i++) {
211 cp = page[i];
212 if (printall == 0 && lastomit == 0 && *cp == 0) {
213 lastomit = 1;
214 continue;
215 }
216 lastomit = 0;
217 printf("%s\n", cp);
218 }
219 bcopy(page[ol], page, (267 - ol) * 132);
220 bzero(page[267- ol], ol * 132);
221 outline -= ol;
222 outcol = 0;
223 first = 1;
224 }
225
move(l,m)226 move(l, m)
227 int l, m;
228 {
229 register char *cp, *dp;
230
231 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) {
232 switch (*cp) {
233 case '|':
234 if (*dp != ' ' && *dp != '|' && *dp != 0)
235 return;
236 break;
237 case ' ':
238 break;
239 default:
240 return;
241 }
242 }
243 if (*cp == 0) {
244 for (cp = page[l], dp = page[m]; *cp; cp++, dp++)
245 if (*cp == '|')
246 *dp = '|';
247 else if (*dp == 0)
248 *dp = ' ';
249 page[l][0] = 0;
250 }
251 }
252