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 1.4 2003/11/03 19:31:29 eirikn 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(int, char *[]); 69 static void move(int, int); 70 static void pflush(int); 71 static int plus(char, char); 72 static void usage(void); 73 74 int 75 main(int argc, char **argv) 76 { 77 int c; 78 char *cp, *dp; 79 int ch; 80 81 while ((ch = getopt(argc, argv, "-2")) != -1) 82 switch (ch) { 83 case '-': 84 suppresul = 1; 85 break; 86 case '2': 87 printall = 1; 88 break; 89 default: 90 usage(); 91 } 92 argc -= optind; 93 argv += optind; 94 95 do { 96 if (argc > 0) { 97 close(0); 98 if (!(f = fopen(argv[0], "r"))) { 99 fflush(stdout); 100 err(1, "%s", argv[0]); 101 } 102 argc--; 103 argv++; 104 } 105 for (;;) { 106 c = getc(stdin); 107 if (c == -1) { 108 pflush(outline); 109 fflush(stdout); 110 break; 111 } 112 switch (c) { 113 case '\n': 114 if (outline >= 265) 115 pflush(62); 116 outline += 2; 117 outcol = 0; 118 continue; 119 case '\016': 120 case '\017': 121 continue; 122 case 033: 123 c = getc(stdin); 124 switch (c) { 125 case '9': 126 if (outline >= 266) 127 pflush(62); 128 outline++; 129 continue; 130 case '8': 131 if (outline >= 1) 132 outline--; 133 continue; 134 case '7': 135 outline -= 2; 136 if (outline < 0) 137 outline = 0; 138 continue; 139 default: 140 continue; 141 } 142 case '\b': 143 if (outcol) 144 outcol--; 145 continue; 146 case '\t': 147 outcol += 8; 148 outcol &= ~7; 149 outcol--; 150 c = ' '; 151 default: 152 if (outcol >= 132) { 153 outcol++; 154 continue; 155 } 156 cp = &page[outline][outcol]; 157 outcol++; 158 if (c == '_') { 159 if (suppresul) 160 continue; 161 cp += 132; 162 c = '-'; 163 } 164 if (*cp == 0) { 165 *cp = c; 166 dp = cp - outcol; 167 for (cp--; cp >= dp && *cp == 0; cp--) 168 *cp = ' '; 169 } else 170 if (plus(c, *cp) || plus(*cp, c)) 171 *cp = '+'; 172 else if (*cp == ' ' || *cp == 0) 173 *cp = c; 174 continue; 175 } 176 } 177 } while (argc > 0); 178 fflush(stdout); 179 exit(0); 180 } 181 182 static void 183 usage(void) 184 { 185 fprintf(stderr, "usage: colcrt [-] [-2] [file ...]\n"); 186 exit(1); 187 } 188 189 static int 190 plus(char c, char d) 191 { 192 193 return ((c == '|' && d == '-') || d == '_'); 194 } 195 196 int first; 197 198 static void 199 pflush(int ol) 200 { 201 register int i; 202 register char *cp; 203 char lastomit; 204 int l; 205 206 l = ol; 207 lastomit = 0; 208 if (l > 266) 209 l = 266; 210 else 211 l |= 1; 212 for (i = first | 1; i < l; i++) { 213 move(i, i - 1); 214 move(i, i + 1); 215 } 216 for (i = first; i < l; i++) { 217 cp = page[i]; 218 if (printall == 0 && lastomit == 0 && *cp == 0) { 219 lastomit = 1; 220 continue; 221 } 222 lastomit = 0; 223 printf("%s\n", cp); 224 } 225 bcopy(page[ol], page, (267 - ol) * 132); 226 bzero(page[267- ol], ol * 132); 227 outline -= ol; 228 outcol = 0; 229 first = 1; 230 } 231 232 static void 233 move(int l, int m) 234 { 235 register char *cp, *dp; 236 237 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { 238 switch (*cp) { 239 case '|': 240 if (*dp != ' ' && *dp != '|' && *dp != 0) 241 return; 242 break; 243 case ' ': 244 break; 245 default: 246 return; 247 } 248 } 249 if (*cp == 0) { 250 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) 251 if (*cp == '|') 252 *dp = '|'; 253 else if (*dp == 0) 254 *dp = ' '; 255 page[l][0] = 0; 256 } 257 } 258