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: head/usr.bin/colcrt/colcrt.c 227158 2011-11-06 08:14:28Z ed $ 32 */ 33 34 #include <err.h> 35 #include <locale.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <wchar.h> 41 42 /* 43 * colcrt - replaces col for crts with new nroff esp. when using tbl. 44 * Bill Joy UCB July 14, 1977 45 * 46 * This filter uses a screen buffer, 267 half-lines by 132 columns. 47 * It interprets the up and down sequences generated by the new 48 * nroff when used with tbl and by \u \d and \r. 49 * General overstriking doesn't work correctly. 50 * Underlining is split onto multiple lines, etc. 51 * 52 * Option - suppresses all underlining. 53 * Option -2 forces printing of all half lines. 54 */ 55 56 static wchar_t page[267][132]; 57 58 static int outline = 1; 59 static int outcol; 60 61 static char suppresul; 62 static char printall; 63 64 static void move(int, int); 65 static void pflush(int); 66 static int plus(wchar_t, wchar_t); 67 static void usage(void); 68 69 int 70 main(int argc, char *argv[]) 71 { 72 wint_t c; 73 wchar_t *cp, *dp; 74 int ch, i, w; 75 76 setlocale(LC_ALL, ""); 77 78 while ((ch = getopt(argc, argv, "-2")) != -1) 79 switch (ch) { 80 case '-': 81 suppresul = 1; 82 break; 83 case '2': 84 printall = 1; 85 break; 86 default: 87 usage(); 88 } 89 argc -= optind; 90 argv += optind; 91 92 do { 93 if (argc > 0) { 94 if (freopen(argv[0], "r", stdin) == NULL) { 95 fflush(stdout); 96 err(1, "%s", argv[0]); 97 } 98 argc--; 99 argv++; 100 } 101 for (;;) { 102 c = getwc(stdin); 103 if (c == WEOF) { 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 = getwc(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 /* FALLTHROUGH */ 148 default: 149 if ((w = wcwidth(c)) <= 0) 150 w = 1; /* XXX */ 151 if (outcol + w > 132) { 152 outcol += w; 153 continue; 154 } 155 cp = &page[outline][outcol]; 156 outcol += w; 157 if (c == '_') { 158 if (suppresul) 159 continue; 160 cp += 132; 161 c = '-'; 162 } 163 if (*cp == 0) { 164 for (i = 0; i < w; i++) 165 cp[i] = c; 166 dp = cp - (outcol - w); 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 for (i = 1; i < w; i++) 174 if (cp[i] != ' ' && 175 cp[i] != 0) 176 goto cont; 177 for (i = 0; i < w; i++) 178 cp[i] = c; 179 } 180 } 181 cont: 182 continue; 183 } 184 } 185 if (ferror(stdin)) 186 err(1, NULL); 187 } while (argc > 0); 188 fflush(stdout); 189 exit(0); 190 } 191 192 static void 193 usage(void) 194 { 195 fprintf(stderr, "usage: colcrt [-] [-2] [file ...]\n"); 196 exit(1); 197 } 198 199 static int 200 plus(wchar_t c, wchar_t d) 201 { 202 203 return ((c == '|' && d == '-') || d == '_'); 204 } 205 206 static void 207 pflush(int ol) 208 { 209 static int first; 210 int i; 211 wchar_t *cp; 212 char lastomit; 213 int l, w; 214 215 l = ol; 216 lastomit = 0; 217 if (l > 266) 218 l = 266; 219 else 220 l |= 1; 221 for (i = first | 1; i < l; i++) { 222 move(i, i - 1); 223 move(i, i + 1); 224 } 225 for (i = first; i < l; i++) { 226 cp = page[i]; 227 if (printall == 0 && lastomit == 0 && *cp == 0) { 228 lastomit = 1; 229 continue; 230 } 231 lastomit = 0; 232 while (*cp != L'\0') { 233 if ((w = wcwidth(*cp)) > 0) { 234 putwchar(*cp); 235 cp += w; 236 } else 237 cp++; 238 } 239 putwchar(L'\n'); 240 } 241 wmemcpy(page[0], page[ol], (267 - ol) * 132); 242 wmemset(page[267- ol], L'\0', ol * 132); 243 outline -= ol; 244 outcol = 0; 245 first = 1; 246 } 247 248 static void 249 move(int l, int m) 250 { 251 wchar_t *cp, *dp; 252 253 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) { 254 switch (*cp) { 255 case '|': 256 if (*dp != ' ' && *dp != '|' && *dp != 0) 257 return; 258 break; 259 case ' ': 260 break; 261 default: 262 return; 263 } 264 } 265 if (*cp == 0) { 266 for (cp = page[l], dp = page[m]; *cp; cp++, dp++) 267 if (*cp == '|') 268 *dp = '|'; 269 else if (*dp == 0) 270 *dp = ' '; 271 page[l][0] = 0; 272 } 273 } 274