1 static char *sccsid = "@(#)colcrt.c 4.4 (Berkeley) 09/17/84"; 2 3 #include <stdio.h> 4 /* 5 * colcrt - replaces col for crts with new nroff esp. when using tbl. 6 * Bill Joy UCB July 14, 1977 7 * 8 * This filter uses a screen buffer, 267 half-lines by 132 columns. 9 * It interprets the up and down sequences generated by the new 10 * nroff when used with tbl and by \u \d and \r. 11 * General overstriking doesn't work correctly. 12 * Underlining is split onto multiple lines, etc. 13 * 14 * Option - suppresses all underlining. 15 * Option -2 forces printing of all half lines. 16 */ 17 18 char page[267][132]; 19 20 int outline = 1; 21 int outcol; 22 23 char suppresul; 24 char printall; 25 26 char *progname; 27 FILE *f; 28 29 main(argc, argv) 30 int argc; 31 char *argv[]; 32 { 33 register c; 34 register char *cp, *dp; 35 36 argc--; 37 progname = *argv++; 38 while (argc > 0 && argv[0][0] == '-') { 39 switch (argv[0][1]) { 40 case 0: 41 suppresul = 1; 42 break; 43 case '2': 44 printall = 1; 45 break; 46 default: 47 printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname); 48 fflush(stdout); 49 exit(1); 50 } 51 argc--; 52 argv++; 53 } 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 exit (1); 62 } 63 argc--; 64 argv++; 65 } 66 for (;;) { 67 c = getc(stdin); 68 if (c == -1) { 69 pflush(outline); 70 fflush(stdout); 71 break; 72 } 73 switch (c) { 74 case '\n': 75 if (outline >= 265) 76 pflush(62); 77 outline += 2; 78 outcol = 0; 79 continue; 80 case '\016': 81 case '\017': 82 continue; 83 case 033: 84 c = getc(stdin); 85 switch (c) { 86 case '9': 87 if (outline >= 266) 88 pflush(62); 89 outline++; 90 continue; 91 case '8': 92 if (outline >= 1) 93 outline--; 94 continue; 95 case '7': 96 outline -= 2; 97 if (outline < 0) 98 outline = 0; 99 continue; 100 default: 101 continue; 102 } 103 case '\b': 104 if (outcol) 105 outcol--; 106 continue; 107 case '\t': 108 outcol += 8; 109 outcol &= ~7; 110 outcol--; 111 c = ' '; 112 default: 113 if (outcol >= 132) { 114 outcol++; 115 continue; 116 } 117 cp = &page[outline][outcol]; 118 outcol++; 119 if (c == '_') { 120 if (suppresul) 121 continue; 122 cp += 132; 123 c = '-'; 124 } 125 if (*cp == 0) { 126 *cp = c; 127 dp = cp - outcol; 128 for (cp--; cp >= dp && *cp == 0; cp--) 129 *cp = ' '; 130 } else 131 if (plus(c, *cp) || plus(*cp, c)) 132 *cp = '+'; 133 else if (*cp == ' ' || *cp == 0) 134 *cp = c; 135 continue; 136 } 137 } 138 } while (argc > 0); 139 fflush(stdout); 140 exit(0); 141 } 142 143 plus(c, d) 144 char c, d; 145 { 146 147 return (c == '|' && d == '-' || d == '_'); 148 } 149 150 int first; 151 152 pflush(ol) 153 int ol; 154 { 155 register int i, j; 156 register char *cp; 157 char lastomit; 158 int l; 159 160 l = ol; 161 lastomit = 0; 162 if (l > 266) 163 l = 266; 164 else 165 l |= 1; 166 for (i = first | 1; i < l; i++) { 167 move(i, i - 1); 168 move(i, i + 1); 169 } 170 for (i = first; i < l; i++) { 171 cp = page[i]; 172 if (printall == 0 && lastomit == 0 && *cp == 0) { 173 lastomit = 1; 174 continue; 175 } 176 lastomit = 0; 177 printf("%s\n", cp); 178 } 179 bcopy(page[ol], page, (267 - ol) * 132); 180 bzero(page[267- ol], ol * 132); 181 outline -= ol; 182 outcol = 0; 183 first = 1; 184 } 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