| 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 | } |