Commit | Line | Data |
---|---|---|
64afdfd4 BJ |
1 | #include <stdio.h> |
2 | /* | |
3 | * colcrt - replaces col for crts with new nroff esp. when using tbl. | |
4 | * Bill Joy UCB July 14, 1977 | |
5 | * | |
6 | * This filter uses a screen buffer, 267 half-lines by 132 columns. | |
7 | * It interprets the up and down sequences generated by the new | |
8 | * nroff when used with tbl and by \u \d and \r. | |
9 | * General overstriking doesn't work correctly. | |
10 | * Underlining is split onto multiple lines, etc. | |
11 | * | |
12 | * Option - suppresses all underlining. | |
13 | * Option -2 forces printing of all half lines. | |
14 | */ | |
15 | ||
16 | char page[267][132]; | |
17 | ||
18 | int outline = 1; | |
19 | int outcol; | |
20 | ||
21 | char buf[256]; | |
22 | char suppresul; | |
23 | char printall; | |
24 | ||
25 | char *progname; | |
26 | FILE *f; | |
27 | ||
28 | main(argc, argv) | |
29 | int argc; | |
30 | char *argv[]; | |
31 | { | |
32 | register c; | |
33 | register char *cp, *dp; | |
34 | ||
35 | argc--; | |
36 | progname = *argv++; | |
37 | while (argc > 0 && argv[0][0] == '-') { | |
38 | switch (argv[0][1]) { | |
39 | case 0: | |
40 | suppresul = 1; | |
41 | break; | |
42 | case '2': | |
43 | printall = 1; | |
44 | break; | |
45 | default: | |
46 | printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname); | |
47 | fflush(stdout); | |
48 | exit(1); | |
49 | } | |
50 | argc--; | |
51 | argv++; | |
52 | } | |
53 | setbuf(stdout, buf); | |
54 | do { | |
55 | if (argc > 0) { | |
56 | close(0); | |
57 | if ((f=fopen(argv[0], "r") | |
58 | ) < 0) { | |
59 | fflush(stdout); | |
60 | perror(argv[0]); | |
61 | fflush(stdout); | |
62 | exit (1); | |
63 | } | |
64 | argc--; | |
65 | argv++; | |
66 | } | |
67 | for (;;) { | |
68 | c = getc(stdin); | |
69 | if (c == -1) { | |
70 | pflush(outline); | |
71 | fflush(stdout); | |
72 | break; | |
73 | } | |
74 | switch (c) { | |
75 | case '\n': | |
76 | if (outline >= 265) | |
77 | pflush(62); | |
78 | outline += 2; | |
79 | outcol = 0; | |
80 | continue; | |
81 | case '\016': | |
82 | case '\017': | |
83 | continue; | |
84 | case 033: | |
85 | c = getc(stdin); | |
86 | switch (c) { | |
87 | case '9': | |
88 | if (outline >= 266) | |
89 | pflush(62); | |
90 | outline++; | |
91 | continue; | |
92 | case '8': | |
93 | if (outline >= 1) | |
94 | outline--; | |
95 | continue; | |
96 | case '7': | |
97 | outline -= 2; | |
98 | if (outline < 0) | |
99 | outline = 0; | |
100 | continue; | |
101 | default: | |
102 | continue; | |
103 | } | |
104 | case '\b': | |
105 | if (outcol) | |
106 | outcol--; | |
107 | continue; | |
108 | case '\t': | |
109 | outcol += 8; | |
110 | outcol &= ~7; | |
111 | outcol--; | |
112 | c = ' '; | |
113 | default: | |
114 | if (outcol >= 132) { | |
115 | outcol++; | |
116 | continue; | |
117 | } | |
118 | cp = &page[outline][outcol]; | |
119 | outcol++; | |
120 | if (c == '_') { | |
121 | if (suppresul) | |
122 | continue; | |
123 | cp += 132; | |
124 | c = '-'; | |
125 | } | |
126 | if (*cp == 0) { | |
127 | *cp = c; | |
128 | dp = cp - outcol; | |
129 | for (cp--; cp >= dp && *cp == 0; cp--) | |
130 | *cp = ' '; | |
131 | } else | |
132 | if (plus(c, *cp) || plus(*cp, c)) | |
133 | *cp = '+'; | |
134 | else if (*cp == ' ' || *cp == 0) | |
135 | *cp = c; | |
136 | continue; | |
137 | } | |
138 | } | |
139 | } while (argc > 0); | |
140 | fflush(stdout); | |
141 | exit(0); | |
142 | } | |
143 | ||
144 | plus(c, d) | |
145 | char c, d; | |
146 | { | |
147 | ||
148 | return (c == '|' && d == '-' || d == '_'); | |
149 | } | |
150 | ||
151 | int first; | |
152 | ||
153 | pflush(ol) | |
154 | int ol; | |
155 | { | |
156 | register int i, j; | |
157 | register char *cp; | |
158 | char lastomit; | |
159 | int l; | |
160 | ||
161 | l = ol; | |
162 | lastomit = 0; | |
163 | if (l > 266) | |
164 | l = 266; | |
165 | else | |
166 | l |= 1; | |
167 | for (i = first | 1; i < l; i++) { | |
168 | move(i, i - 1); | |
169 | move(i, i + 1); | |
170 | } | |
171 | for (i = first; i < l; i++) { | |
172 | cp = page[i]; | |
173 | if (printall == 0 && lastomit == 0 && *cp == 0) { | |
174 | lastomit = 1; | |
175 | continue; | |
176 | } | |
177 | lastomit = 0; | |
178 | printf("%s\n", cp); | |
179 | } | |
180 | copy(page, page[ol], (267 - ol) * 132); | |
181 | clear(page[267- ol], ol * 132); | |
182 | outline -= ol; | |
183 | outcol = 0; | |
184 | first = 1; | |
185 | } | |
186 | move(l, m) | |
187 | int l, m; | |
188 | { | |
189 | register char *cp, *dp; | |
190 | ||
191 | for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { | |
192 | switch (*cp) { | |
193 | case '|': | |
194 | if (*dp != ' ' && *dp != '|' && *dp != 0) | |
195 | return; | |
196 | break; | |
197 | case ' ': | |
198 | break; | |
199 | default: | |
200 | return; | |
201 | } | |
202 | } | |
203 | if (*cp == 0) { | |
204 | for (cp = page[l], dp = page[m]; *cp; cp++, dp++) | |
205 | if (*cp == '|') | |
206 | *dp = '|'; | |
207 | else if (*dp == 0) | |
208 | *dp = ' '; | |
209 | page[l][0] = 0; | |
210 | } | |
211 | } | |
212 | ||
213 | copy(to, from, i) | |
214 | register char *to, *from; | |
215 | register int i; | |
216 | { | |
217 | ||
218 | if (i > 0) | |
219 | do | |
220 | *to++ = *from++; | |
221 | while (--i); | |
222 | } | |
223 | ||
224 | clear(at, cnt) | |
225 | register char *at; | |
226 | register int cnt; | |
227 | { | |
228 | ||
229 | if (cnt > 0) | |
230 | do | |
231 | *at++ = 0; | |
232 | while (--cnt); | |
233 | } |