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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)ul.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <err.h> 45 #include <locale.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <termcap.h> 50 #include <unistd.h> 51 #include <wchar.h> 52 #include <wctype.h> 53 54 #define IESC '\033' 55 #define SO '\016' 56 #define SI '\017' 57 #define HFWD '9' 58 #define HREV '8' 59 #define FREV '7' 60 #define MAXBUF 512 61 62 #define NORMAL 000 63 #define ALTSET 001 /* Reverse */ 64 #define SUPERSC 002 /* Dim */ 65 #define SUBSC 004 /* Dim | Ul */ 66 #define UNDERL 010 /* Ul */ 67 #define BOLD 020 /* Bold */ 68 69 static int must_use_uc, must_overstrike; 70 static const char 71 *CURS_UP, *CURS_RIGHT, *CURS_LEFT, 72 *ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE, 73 *ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES; 74 75 struct CHAR { 76 char c_mode; 77 wchar_t c_char; 78 int c_width; /* width or -1 if multi-column char. filler */ 79 } ; 80 81 static struct CHAR sobuf[MAXBUF]; /* static output buffer */ 82 static struct CHAR *obuf = sobuf; 83 static int buflen = MAXBUF; 84 static int col, maxcol; 85 static int mode; 86 static int halfpos; 87 static int upln; 88 static int iflag; 89 90 static void usage(void); 91 static void setnewmode(int); 92 static void initcap(void); 93 static void reverse(void); 94 static int outchar(int); 95 static void fwd(void); 96 static void initbuf(void); 97 static void iattr(void); 98 static void overstrike(void); 99 static void flushln(void); 100 static void filter(FILE *); 101 static void outc(wint_t, int); 102 103 #define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar) 104 105 int 106 main(int argc, char **argv) 107 { 108 int c; 109 const char *termtype; 110 FILE *f; 111 char termcap[1024]; 112 113 setlocale(LC_ALL, ""); 114 115 termtype = getenv("TERM"); 116 if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1))) 117 termtype = "lpr"; 118 while ((c = getopt(argc, argv, "it:T:")) != -1) 119 switch (c) { 120 case 't': 121 case 'T': /* for nroff compatibility */ 122 termtype = optarg; 123 break; 124 case 'i': 125 iflag = 1; 126 break; 127 default: 128 usage(); 129 } 130 131 switch (tgetent(termcap, termtype)) { 132 case 1: 133 break; 134 default: 135 warnx("trouble reading termcap"); 136 /* FALLTHROUGH */ 137 case 0: 138 /* No such terminal type - assume dumb */ 139 (void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:"); 140 break; 141 } 142 initcap(); 143 if ((tgetflag("os") && ENTER_BOLD == NULL ) || 144 (tgetflag("ul") && ENTER_UNDERLINE == NULL && UNDER_CHAR == NULL)) 145 must_overstrike = 1; 146 initbuf(); 147 if (optind == argc) 148 filter(stdin); 149 else for (; optind<argc; optind++) { 150 f = fopen(argv[optind],"r"); 151 if (f == NULL) 152 err(1, "%s", argv[optind]); 153 else 154 filter(f); 155 } 156 if (obuf != sobuf) { 157 free(obuf); 158 } 159 exit(0); 160 } 161 162 static void 163 usage(void) 164 { 165 fprintf(stderr, "usage: ul [-i] [-t terminal] [file ...]\n"); 166 exit(1); 167 } 168 169 static void 170 filter(FILE *f) 171 { 172 wint_t c; 173 int i, w; 174 int copy; 175 176 copy = 0; 177 178 while ((c = getwc(f)) != WEOF) { 179 if (col == buflen) { 180 if (obuf == sobuf) { 181 obuf = NULL; 182 copy = 1; 183 } 184 obuf = realloc(obuf, sizeof(*obuf) * 2 * buflen); 185 if (obuf == NULL) { 186 obuf = sobuf; 187 break; 188 } else if (copy) { 189 memcpy(obuf, sobuf, sizeof(*obuf) * buflen); 190 copy = 0; 191 } 192 bzero((char *)(obuf + buflen), sizeof(*obuf) * buflen); 193 buflen *= 2; 194 } 195 switch(c) { 196 case '\b': 197 if (col > 0) 198 col--; 199 continue; 200 201 case '\t': 202 col = (col+8) & ~07; 203 if (col > maxcol) 204 maxcol = col; 205 continue; 206 207 case '\r': 208 col = 0; 209 continue; 210 211 case SO: 212 mode |= ALTSET; 213 continue; 214 215 case SI: 216 mode &= ~ALTSET; 217 continue; 218 219 case IESC: 220 switch (c = getwc(f)) { 221 222 case HREV: 223 if (halfpos == 0) { 224 mode |= SUPERSC; 225 halfpos--; 226 } else if (halfpos > 0) { 227 mode &= ~SUBSC; 228 halfpos--; 229 } else { 230 halfpos = 0; 231 reverse(); 232 } 233 continue; 234 235 case HFWD: 236 if (halfpos == 0) { 237 mode |= SUBSC; 238 halfpos++; 239 } else if (halfpos < 0) { 240 mode &= ~SUPERSC; 241 halfpos++; 242 } else { 243 halfpos = 0; 244 fwd(); 245 } 246 continue; 247 248 case FREV: 249 reverse(); 250 continue; 251 252 default: 253 errx(1, "unknown escape sequence in input: %o, %o", IESC, c); 254 } 255 continue; 256 257 case '_': 258 if (obuf[col].c_char || obuf[col].c_width < 0) { 259 while (col > 0 && obuf[col].c_width < 0) 260 col--; 261 w = obuf[col].c_width; 262 for (i = 0; i < w; i++) 263 obuf[col++].c_mode |= UNDERL | mode; 264 if (col > maxcol) 265 maxcol = col; 266 continue; 267 } 268 obuf[col].c_char = '_'; 269 obuf[col].c_width = 1; 270 /* FALLTHROUGH */ 271 case ' ': 272 col++; 273 if (col > maxcol) 274 maxcol = col; 275 continue; 276 277 case '\n': 278 flushln(); 279 continue; 280 281 case '\f': 282 flushln(); 283 putwchar('\f'); 284 continue; 285 286 default: 287 if ((w = wcwidth(c)) <= 0) /* non printing */ 288 continue; 289 if (obuf[col].c_char == '\0') { 290 obuf[col].c_char = c; 291 for (i = 0; i < w; i++) 292 obuf[col + i].c_mode = mode; 293 obuf[col].c_width = w; 294 for (i = 1; i < w; i++) 295 obuf[col + i].c_width = -1; 296 } else if (obuf[col].c_char == '_') { 297 obuf[col].c_char = c; 298 for (i = 0; i < w; i++) 299 obuf[col + i].c_mode |= UNDERL|mode; 300 obuf[col].c_width = w; 301 for (i = 1; i < w; i++) 302 obuf[col + i].c_width = -1; 303 } else if ((wint_t)obuf[col].c_char == c) { 304 for (i = 0; i < w; i++) 305 obuf[col + i].c_mode |= BOLD|mode; 306 } else { 307 w = obuf[col].c_width; 308 for (i = 0; i < w; i++) 309 obuf[col + i].c_mode = mode; 310 } 311 col += w; 312 if (col > maxcol) 313 maxcol = col; 314 continue; 315 } 316 } 317 if (ferror(f)) 318 err(1, NULL); 319 if (maxcol) 320 flushln(); 321 } 322 323 static void 324 flushln(void) 325 { 326 int lastmode; 327 int i; 328 int hadmodes = 0; 329 330 lastmode = NORMAL; 331 for (i = 0; i < maxcol; i++) { 332 if (obuf[i].c_mode != lastmode) { 333 hadmodes++; 334 setnewmode(obuf[i].c_mode); 335 lastmode = obuf[i].c_mode; 336 } 337 if (obuf[i].c_char == '\0') { 338 if (upln) 339 PRINT(CURS_RIGHT); 340 else 341 outc(' ', 1); 342 } else 343 outc(obuf[i].c_char, obuf[i].c_width); 344 if (obuf[i].c_width > 1) 345 i += obuf[i].c_width - 1; 346 } 347 if (lastmode != NORMAL) { 348 setnewmode(0); 349 } 350 if (must_overstrike && hadmodes) 351 overstrike(); 352 putwchar('\n'); 353 if (iflag && hadmodes) 354 iattr(); 355 (void)fflush(stdout); 356 if (upln) 357 upln--; 358 initbuf(); 359 } 360 361 /* 362 * For terminals that can overstrike, overstrike underlines and bolds. 363 * We don't do anything with halfline ups and downs, or Greek. 364 */ 365 static void 366 overstrike(void) 367 { 368 int i; 369 wchar_t lbuf[256]; 370 wchar_t *cp = lbuf; 371 int hadbold=0; 372 373 /* Set up overstrike buffer */ 374 for (i=0; i<maxcol; i++) 375 switch (obuf[i].c_mode) { 376 case NORMAL: 377 default: 378 *cp++ = ' '; 379 break; 380 case UNDERL: 381 *cp++ = '_'; 382 break; 383 case BOLD: 384 *cp++ = obuf[i].c_char; 385 if (obuf[i].c_width > 1) 386 i += obuf[i].c_width - 1; 387 hadbold=1; 388 break; 389 } 390 putwchar('\r'); 391 for (*cp=' '; *cp==' '; cp--) 392 *cp = 0; 393 for (cp=lbuf; *cp; cp++) 394 putwchar(*cp); 395 if (hadbold) { 396 putwchar('\r'); 397 for (cp=lbuf; *cp; cp++) 398 putwchar(*cp=='_' ? ' ' : *cp); 399 putwchar('\r'); 400 for (cp=lbuf; *cp; cp++) 401 putwchar(*cp=='_' ? ' ' : *cp); 402 } 403 } 404 405 static void 406 iattr(void) 407 { 408 int i; 409 wchar_t lbuf[256]; 410 wchar_t *cp = lbuf; 411 412 for (i=0; i<maxcol; i++) 413 switch (obuf[i].c_mode) { 414 case NORMAL: *cp++ = ' '; break; 415 case ALTSET: *cp++ = 'g'; break; 416 case SUPERSC: *cp++ = '^'; break; 417 case SUBSC: *cp++ = 'v'; break; 418 case UNDERL: *cp++ = '_'; break; 419 case BOLD: *cp++ = '!'; break; 420 default: *cp++ = 'X'; break; 421 } 422 for (*cp=' '; *cp==' '; cp--) 423 *cp = 0; 424 for (cp=lbuf; *cp; cp++) 425 putwchar(*cp); 426 putwchar('\n'); 427 } 428 429 static void 430 initbuf(void) 431 { 432 433 bzero((char *)obuf, buflen * sizeof(*obuf)); /* depends on NORMAL == 0 */ 434 col = 0; 435 maxcol = 0; 436 mode &= ALTSET; 437 } 438 439 static void 440 fwd(void) 441 { 442 int oldcol, oldmax; 443 444 oldcol = col; 445 oldmax = maxcol; 446 flushln(); 447 col = oldcol; 448 maxcol = oldmax; 449 } 450 451 static void 452 reverse(void) 453 { 454 upln++; 455 fwd(); 456 PRINT(CURS_UP); 457 PRINT(CURS_UP); 458 upln++; 459 } 460 461 static void 462 initcap(void) 463 { 464 static char tcapbuf[512]; 465 char *bp = tcapbuf; 466 467 /* This nonsense attempts to work with both old and new termcap */ 468 CURS_UP = tgetstr("up", &bp); 469 CURS_RIGHT = tgetstr("ri", &bp); 470 if (CURS_RIGHT == NULL) 471 CURS_RIGHT = tgetstr("nd", &bp); 472 CURS_LEFT = tgetstr("le", &bp); 473 if (CURS_LEFT == NULL) 474 CURS_LEFT = tgetstr("bc", &bp); 475 if (CURS_LEFT == NULL && tgetflag("bs")) 476 CURS_LEFT = "\b"; 477 478 ENTER_STANDOUT = tgetstr("so", &bp); 479 EXIT_STANDOUT = tgetstr("se", &bp); 480 ENTER_UNDERLINE = tgetstr("us", &bp); 481 EXIT_UNDERLINE = tgetstr("ue", &bp); 482 ENTER_DIM = tgetstr("mh", &bp); 483 ENTER_BOLD = tgetstr("md", &bp); 484 ENTER_REVERSE = tgetstr("mr", &bp); 485 EXIT_ATTRIBUTES = tgetstr("me", &bp); 486 487 if (!ENTER_BOLD && ENTER_REVERSE) 488 ENTER_BOLD = ENTER_REVERSE; 489 if (!ENTER_BOLD && ENTER_STANDOUT) 490 ENTER_BOLD = ENTER_STANDOUT; 491 if (!ENTER_UNDERLINE && ENTER_STANDOUT) { 492 ENTER_UNDERLINE = ENTER_STANDOUT; 493 EXIT_UNDERLINE = EXIT_STANDOUT; 494 } 495 if (!ENTER_DIM && ENTER_STANDOUT) 496 ENTER_DIM = ENTER_STANDOUT; 497 if (!ENTER_REVERSE && ENTER_STANDOUT) 498 ENTER_REVERSE = ENTER_STANDOUT; 499 if (!EXIT_ATTRIBUTES && EXIT_STANDOUT) 500 EXIT_ATTRIBUTES = EXIT_STANDOUT; 501 502 /* 503 * Note that we use REVERSE for the alternate character set, 504 * not the as/ae capabilities. This is because we are modelling 505 * the model 37 teletype (since that's what nroff outputs) and 506 * the typical as/ae is more of a graphics set, not the greek 507 * letters the 37 has. 508 */ 509 510 UNDER_CHAR = tgetstr("uc", &bp); 511 must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE); 512 } 513 514 static int 515 outchar(int c) 516 { 517 return (putwchar(c) != WEOF ? c : EOF); 518 } 519 520 static int curmode = 0; 521 522 static void 523 outc(wint_t c, int width) 524 { 525 int i; 526 527 putwchar(c); 528 if (must_use_uc && (curmode&UNDERL)) { 529 for (i = 0; i < width; i++) 530 PRINT(CURS_LEFT); 531 for (i = 0; i < width; i++) 532 PRINT(UNDER_CHAR); 533 } 534 } 535 536 static void 537 setnewmode(int newmode) 538 { 539 if (!iflag) { 540 if (curmode != NORMAL && newmode != NORMAL) 541 setnewmode(NORMAL); 542 switch (newmode) { 543 case NORMAL: 544 switch(curmode) { 545 case NORMAL: 546 break; 547 case UNDERL: 548 PRINT(EXIT_UNDERLINE); 549 break; 550 default: 551 /* This includes standout */ 552 PRINT(EXIT_ATTRIBUTES); 553 break; 554 } 555 break; 556 case ALTSET: 557 PRINT(ENTER_REVERSE); 558 break; 559 case SUPERSC: 560 /* 561 * This only works on a few terminals. 562 * It should be fixed. 563 */ 564 PRINT(ENTER_UNDERLINE); 565 PRINT(ENTER_DIM); 566 break; 567 case SUBSC: 568 PRINT(ENTER_DIM); 569 break; 570 case UNDERL: 571 PRINT(ENTER_UNDERLINE); 572 break; 573 case BOLD: 574 PRINT(ENTER_BOLD); 575 break; 576 default: 577 /* 578 * We should have some provision here for multiple modes 579 * on at once. This will have to come later. 580 */ 581 PRINT(ENTER_STANDOUT); 582 break; 583 } 584 } 585 curmode = newmode; 586 } 587