1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)colcrt.c 8.1 (Berkeley) 06/06/93"; 16 #endif /* not lint */ 17 18 #include <stdio.h> 19 /* 20 * colcrt - replaces col for crts with new nroff esp. when using tbl. 21 * Bill Joy UCB July 14, 1977 22 * 23 * This filter uses a screen buffer, 267 half-lines by 132 columns. 24 * It interprets the up and down sequences generated by the new 25 * nroff when used with tbl and by \u \d and \r. 26 * General overstriking doesn't work correctly. 27 * Underlining is split onto multiple lines, etc. 28 * 29 * Option - suppresses all underlining. 30 * Option -2 forces printing of all half lines. 31 */ 32 33 char page[267][132]; 34 35 int outline = 1; 36 int outcol; 37 38 char suppresul; 39 char printall; 40 41 char *progname; 42 FILE *f; 43 44 main(argc, argv) 45 int argc; 46 char *argv[]; 47 { 48 register c; 49 register char *cp, *dp; 50 51 argc--; 52 progname = *argv++; 53 while (argc > 0 && argv[0][0] == '-') { 54 switch (argv[0][1]) { 55 case 0: 56 suppresul = 1; 57 break; 58 case '2': 59 printall = 1; 60 break; 61 default: 62 printf("usage: %s [ - ] [ -2 ] [ file ... ]\n", progname); 63 fflush(stdout); 64 exit(1); 65 } 66 argc--; 67 argv++; 68 } 69 do { 70 if (argc > 0) { 71 close(0); 72 if (!(f = fopen(argv[0], "r"))) { 73 fflush(stdout); 74 perror(argv[0]); 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 } 193 bcopy(page[ol], page, (267 - ol) * 132); 194 bzero(page[267- ol], ol * 132); 195 outline -= ol; 196 outcol = 0; 197 first = 1; 198 } 199 200 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 } 226