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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)colcrt.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/colcrt/colcrt.c,v 1.5.2.4 2001/08/02 01:29:07 obrien Exp $ 36 * $DragonFly: src/usr.bin/colcrt/colcrt.c,v 1.2 2003/06/17 04:29:25 dillon Exp $ 37 */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 /* 45 * colcrt - replaces col for crts with new nroff esp. when using tbl. 46 * Bill Joy UCB July 14, 1977 47 * 48 * This filter uses a screen buffer, 267 half-lines by 132 columns. 49 * It interprets the up and down sequences generated by the new 50 * nroff when used with tbl and by \u \d and \r. 51 * General overstriking doesn't work correctly. 52 * Underlining is split onto multiple lines, etc. 53 * 54 * Option - suppresses all underlining. 55 * Option -2 forces printing of all half lines. 56 */ 57 58 char page[267][132]; 59 60 int outline = 1; 61 int outcol; 62 63 char suppresul; 64 char printall; 65 66 FILE *f; 67 68 int main __P((int, char *[])); 69 static void move __P((int, int)); 70 static void pflush __P((int)); 71 static int plus __P((char, char)); 72 static void usage __P((void)); 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 int c; 80 char *cp, *dp; 81 int ch; 82 83 while ((ch = getopt(argc, argv, "-2")) != -1) 84 switch (ch) { 85 case '-': 86 suppresul = 1; 87 break; 88 case '2': 89 printall = 1; 90 break; 91 default: 92 usage(); 93 } 94 argc -= optind; 95 argv += optind; 96 97 do { 98 if (argc > 0) { 99 close(0); 100 if (!(f = fopen(argv[0], "r"))) { 101 fflush(stdout); 102 err(1, "%s", argv[0]); 103 } 104 argc--; 105 argv++; 106 } 107 for (;;) { 108 c = getc(stdin); 109 if (c == -1) { 110 pflush(outline); 111 fflush(stdout); 112 break; 113 } 114 switch (c) { 115 case '\n': 116 if (outline >= 265) 117 pflush(62); 118 outline += 2; 119 outcol = 0; 120 continue; 121 case '\016': 122 case '\017': 123 continue; 124 case 033: 125 c = getc(stdin); 126 switch (c) { 127 case '9': 128 if (outline >= 266) 129 pflush(62); 130 outline++; 131 continue; 132 case '8': 133 if (outline >= 1) 134 outline--; 135 continue; 136 case '7': 137 outline -= 2; 138 if (outline < 0) 139 outline = 0; 140 continue; 141 default: 142 continue; 143 } 144 case '\b': 145 if (outcol) 146 outcol--; 147 continue; 148 case '\t': 149 outcol += 8; 150 outcol &= ~7; 151 outcol--; 152 c = ' '; 153 default: 154 if (outcol >= 132) { 155 outcol++; 156 continue; 157 } 158 cp = &page[outline][outcol]; 159 outcol++; 160 if (c == '_') { 161 if (suppresul) 162 continue; 163 cp += 132; 164 c = '-'; 165 } 166 if (*cp == 0) { 167 *cp = c; 168 dp = cp - outcol; 169 for (cp--; cp >= dp && *cp == 0; cp--) 170 *cp = ' '; 171 } else 172 if (plus(c, *cp) || plus(*cp, c)) 173 *cp = '+'; 174 else if (*cp == ' ' || *cp == 0) 175 *cp = c; 176 continue; 177 } 178 } 179 } while (argc > 0); 180 fflush(stdout); 181 exit(0); 182 } 183 184 static void 185 usage() 186 { 187 fprintf(stderr, "usage: colcrt [-] [-2] [file ...]\n"); 188 exit(1); 189 } 190 191 static int 192 plus(c, d) 193 char c, d; 194 { 195 196 return ((c == '|' && d == '-') || d == '_'); 197 } 198 199 int first; 200 201 static void 202 pflush(ol) 203 int ol; 204 { 205 register int i; 206 register char *cp; 207 char lastomit; 208 int l; 209 210 l = ol; 211 lastomit = 0; 212 if (l > 266) 213 l = 266; 214 else 215 l |= 1; 216 for (i = first | 1; i < l; i++) { 217 move(i, i - 1); 218 move(i, i + 1); 219 } 220 for (i = first; i < l; i++) { 221 cp = page[i]; 222 if (printall == 0 && lastomit == 0 && *cp == 0) { 223 lastomit = 1; 224 continue; 225 } 226 lastomit = 0; 227 printf("%s\n", cp); 228 } 229 bcopy(page[ol], page, (267 - ol) * 132); 230 bzero(page[267- ol], ol * 132); 231 outline -= ol; 232 outcol = 0; 233 first = 1; 234 } 235 236 static void 237 move(l, m) 238 int l, m; 239 { 240 register char *cp, *dp; 241 242 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { 243 switch (*cp) { 244 case '|': 245 if (*dp != ' ' && *dp != '|' && *dp != 0) 246 return; 247 break; 248 case ' ': 249 break; 250 default: 251 return; 252 } 253 } 254 if (*cp == 0) { 255 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) 256 if (*cp == '|') 257 *dp = '|'; 258 else if (*dp == 0) 259 *dp = ' '; 260 page[l][0] = 0; 261 } 262 } 263