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fcd2465c DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
13 | #ifndef lint | |
14 | static char sccsid[] = "@(#)colcrt.c 5.1 (Berkeley) %G%"; | |
15 | #endif not lint | |
c1759b83 | 16 | |
fb76c798 BJ |
17 | #include <stdio.h> |
18 | /* | |
19 | * colcrt - replaces col for crts with new nroff esp. when using tbl. | |
20 | * Bill Joy UCB July 14, 1977 | |
21 | * | |
22 | * This filter uses a screen buffer, 267 half-lines by 132 columns. | |
23 | * It interprets the up and down sequences generated by the new | |
24 | * nroff when used with tbl and by \u \d and \r. | |
25 | * General overstriking doesn't work correctly. | |
26 | * Underlining is split onto multiple lines, etc. | |
27 | * | |
28 | * Option - suppresses all underlining. | |
29 | * Option -2 forces printing of all half lines. | |
30 | */ | |
31 | ||
32 | char page[267][132]; | |
33 | ||
34 | int outline = 1; | |
35 | int outcol; | |
36 | ||
fb76c798 BJ |
37 | char suppresul; |
38 | char printall; | |
39 | ||
40 | char *progname; | |
41 | FILE *f; | |
42 | ||
43 | main(argc, argv) | |
44 | int argc; | |
45 | char *argv[]; | |
46 | { | |
47 | register c; | |
48 | register char *cp, *dp; | |
49 | ||
50 | argc--; | |
51 | progname = *argv++; | |
52 | while (argc > 0 && argv[0][0] == '-') { | |
53 | switch (argv[0][1]) { | |
54 | case 0: | |
55 | suppresul = 1; | |
56 | break; | |
57 | case '2': | |
58 | printall = 1; | |
59 | break; | |
60 | default: | |
61 | printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname); | |
62 | fflush(stdout); | |
63 | exit(1); | |
64 | } | |
65 | argc--; | |
66 | argv++; | |
67 | } | |
fb76c798 BJ |
68 | do { |
69 | if (argc > 0) { | |
70 | close(0); | |
71 | if ((f=fopen(argv[0], "r") | |
72 | ) < 0) { | |
73 | fflush(stdout); | |
74 | perror(argv[0]); | |
fb76c798 BJ |
75 | exit (1); |
76 | } | |
77 | argc--; | |
78 | argv++; | |
79 | } | |
80 | for (;;) { | |
81 | c = getc(stdin); | |
82 | if (c == -1) { | |
83 | pflush(outline); | |
84 | fflush(stdout); | |
85 | break; | |
86 | } | |
87 | switch (c) { | |
88 | case '\n': | |
89 | if (outline >= 265) | |
90 | pflush(62); | |
91 | outline += 2; | |
92 | outcol = 0; | |
93 | continue; | |
94 | case '\016': | |
95 | case '\017': | |
96 | continue; | |
97 | case 033: | |
98 | c = getc(stdin); | |
99 | switch (c) { | |
100 | case '9': | |
101 | if (outline >= 266) | |
102 | pflush(62); | |
103 | outline++; | |
104 | continue; | |
105 | case '8': | |
106 | if (outline >= 1) | |
107 | outline--; | |
108 | continue; | |
109 | case '7': | |
110 | outline -= 2; | |
111 | if (outline < 0) | |
112 | outline = 0; | |
113 | continue; | |
114 | default: | |
115 | continue; | |
116 | } | |
117 | case '\b': | |
118 | if (outcol) | |
119 | outcol--; | |
120 | continue; | |
121 | case '\t': | |
122 | outcol += 8; | |
123 | outcol &= ~7; | |
124 | outcol--; | |
125 | c = ' '; | |
126 | default: | |
127 | if (outcol >= 132) { | |
128 | outcol++; | |
129 | continue; | |
130 | } | |
131 | cp = &page[outline][outcol]; | |
132 | outcol++; | |
133 | if (c == '_') { | |
134 | if (suppresul) | |
135 | continue; | |
136 | cp += 132; | |
137 | c = '-'; | |
138 | } | |
139 | if (*cp == 0) { | |
140 | *cp = c; | |
141 | dp = cp - outcol; | |
142 | for (cp--; cp >= dp && *cp == 0; cp--) | |
143 | *cp = ' '; | |
144 | } else | |
145 | if (plus(c, *cp) || plus(*cp, c)) | |
146 | *cp = '+'; | |
147 | else if (*cp == ' ' || *cp == 0) | |
148 | *cp = c; | |
149 | continue; | |
150 | } | |
151 | } | |
152 | } while (argc > 0); | |
153 | fflush(stdout); | |
154 | exit(0); | |
155 | } | |
156 | ||
157 | plus(c, d) | |
158 | char c, d; | |
159 | { | |
160 | ||
161 | return (c == '|' && d == '-' || d == '_'); | |
162 | } | |
163 | ||
164 | int first; | |
165 | ||
166 | pflush(ol) | |
167 | int ol; | |
168 | { | |
169 | register int i, j; | |
170 | register char *cp; | |
171 | char lastomit; | |
172 | int l; | |
173 | ||
174 | l = ol; | |
175 | lastomit = 0; | |
176 | if (l > 266) | |
177 | l = 266; | |
178 | else | |
179 | l |= 1; | |
180 | for (i = first | 1; i < l; i++) { | |
181 | move(i, i - 1); | |
182 | move(i, i + 1); | |
183 | } | |
184 | for (i = first; i < l; i++) { | |
185 | cp = page[i]; | |
186 | if (printall == 0 && lastomit == 0 && *cp == 0) { | |
187 | lastomit = 1; | |
188 | continue; | |
189 | } | |
190 | lastomit = 0; | |
191 | printf("%s\n", cp); | |
192 | } | |
c1759b83 SL |
193 | bcopy(page[ol], page, (267 - ol) * 132); |
194 | bzero(page[267- ol], ol * 132); | |
fb76c798 BJ |
195 | outline -= ol; |
196 | outcol = 0; | |
197 | first = 1; | |
198 | } | |
c1759b83 | 199 | |
fb76c798 BJ |
200 | move(l, m) |
201 | int l, m; | |
202 | { | |
203 | register char *cp, *dp; | |
204 | ||
205 | for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { | |
206 | switch (*cp) { | |
207 | case '|': | |
208 | if (*dp != ' ' && *dp != '|' && *dp != 0) | |
209 | return; | |
210 | break; | |
211 | case ' ': | |
212 | break; | |
213 | default: | |
214 | return; | |
215 | } | |
216 | } | |
217 | if (*cp == 0) { | |
218 | for (cp = page[l], dp = page[m]; *cp; cp++, dp++) | |
219 | if (*cp == '|') | |
220 | *dp = '|'; | |
221 | else if (*dp == 0) | |
222 | *dp = ' '; | |
223 | page[l][0] = 0; | |
224 | } | |
225 | } |