1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)colcrt.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/colcrt/colcrt.c,v 1.5.2.4 2001/08/02 01:29:07 obrien Exp $ 32 * $DragonFly: src/usr.bin/colcrt/colcrt.c,v 1.5 2005/08/04 17:31:22 drhodus Exp $ 33 */ 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 /* 41 * colcrt - replaces col for crts with new nroff esp. when using tbl. 42 * Bill Joy UCB July 14, 1977 43 * 44 * This filter uses a screen buffer, 267 half-lines by 132 columns. 45 * It interprets the up and down sequences generated by the new 46 * nroff when used with tbl and by \u \d and \r. 47 * General overstriking doesn't work correctly. 48 * Underlining is split onto multiple lines, etc. 49 * 50 * Option - suppresses all underlining. 51 * Option -2 forces printing of all half lines. 52 */ 53 54 char page[267][132]; 55 56 int outline = 1; 57 int outcol; 58 59 char suppresul; 60 char printall; 61 62 FILE *f; 63 64 int main(int, char *[]); 65 static void move(int, int); 66 static void pflush(int); 67 static int plus(char, char); 68 static void usage(void); 69 70 int 71 main(int argc, char **argv) 72 { 73 int c; 74 char *cp, *dp; 75 int ch; 76 77 while ((ch = getopt(argc, argv, "-2")) != -1) 78 switch (ch) { 79 case '-': 80 suppresul = 1; 81 break; 82 case '2': 83 printall = 1; 84 break; 85 default: 86 usage(); 87 } 88 argc -= optind; 89 argv += optind; 90 91 do { 92 if (argc > 0) { 93 close(0); 94 if (!(f = fopen(argv[0], "r"))) { 95 fflush(stdout); 96 err(1, "%s", argv[0]); 97 } 98 argc--; 99 argv++; 100 } 101 for (;;) { 102 c = getc(stdin); 103 if (c == -1) { 104 pflush(outline); 105 fflush(stdout); 106 break; 107 } 108 switch (c) { 109 case '\n': 110 if (outline >= 265) 111 pflush(62); 112 outline += 2; 113 outcol = 0; 114 continue; 115 case '\016': 116 case '\017': 117 continue; 118 case 033: 119 c = getc(stdin); 120 switch (c) { 121 case '9': 122 if (outline >= 266) 123 pflush(62); 124 outline++; 125 continue; 126 case '8': 127 if (outline >= 1) 128 outline--; 129 continue; 130 case '7': 131 outline -= 2; 132 if (outline < 0) 133 outline = 0; 134 continue; 135 default: 136 continue; 137 } 138 case '\b': 139 if (outcol) 140 outcol--; 141 continue; 142 case '\t': 143 outcol += 8; 144 outcol &= ~7; 145 outcol--; 146 c = ' '; 147 default: 148 if (outcol >= 132) { 149 outcol++; 150 continue; 151 } 152 cp = &page[outline][outcol]; 153 outcol++; 154 if (c == '_') { 155 if (suppresul) 156 continue; 157 cp += 132; 158 c = '-'; 159 } 160 if (*cp == 0) { 161 *cp = c; 162 dp = cp - outcol; 163 for (cp--; cp >= dp && *cp == 0; cp--) 164 *cp = ' '; 165 } else 166 if (plus(c, *cp) || plus(*cp, c)) 167 *cp = '+'; 168 else if (*cp == ' ' || *cp == 0) 169 *cp = c; 170 continue; 171 } 172 } 173 } while (argc > 0); 174 fflush(stdout); 175 exit(0); 176 } 177 178 static void 179 usage(void) 180 { 181 fprintf(stderr, "usage: colcrt [-] [-2] [file ...]\n"); 182 exit(1); 183 } 184 185 static int 186 plus(char c, char d) 187 { 188 189 return ((c == '|' && d == '-') || d == '_'); 190 } 191 192 int first; 193 194 static void 195 pflush(int ol) 196 { 197 int i; 198 char *cp; 199 char lastomit; 200 int l; 201 202 l = ol; 203 lastomit = 0; 204 if (l > 266) 205 l = 266; 206 else 207 l |= 1; 208 for (i = first | 1; i < l; i++) { 209 move(i, i - 1); 210 move(i, i + 1); 211 } 212 for (i = first; i < l; i++) { 213 cp = page[i]; 214 if (printall == 0 && lastomit == 0 && *cp == 0) { 215 lastomit = 1; 216 continue; 217 } 218 lastomit = 0; 219 printf("%s\n", cp); 220 } 221 bcopy(page[ol], page, (267 - ol) * 132); 222 bzero(page[267- ol], ol * 132); 223 outline -= ol; 224 outcol = 0; 225 first = 1; 226 } 227 228 static void 229 move(int l, int m) 230 { 231 char *cp, *dp; 232 233 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { 234 switch (*cp) { 235 case '|': 236 if (*dp != ' ' && *dp != '|' && *dp != 0) 237 return; 238 break; 239 case ' ': 240 break; 241 default: 242 return; 243 } 244 } 245 if (*cp == 0) { 246 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) 247 if (*cp == '|') 248 *dp = '|'; 249 else if (*dp == 0) 250 *dp = ' '; 251 page[l][0] = 0; 252 } 253 } 254