1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)ul.c 8.1 (Berkeley) 06/06/93"; 16 #endif /* not lint */ 17 18 #include <stdio.h> 19 20 #define IESC '\033' 21 #define SO '\016' 22 #define SI '\017' 23 #define HFWD '9' 24 #define HREV '8' 25 #define FREV '7' 26 #define MAXBUF 512 27 28 #define NORMAL 000 29 #define ALTSET 001 /* Reverse */ 30 #define SUPERSC 002 /* Dim */ 31 #define SUBSC 004 /* Dim | Ul */ 32 #define UNDERL 010 /* Ul */ 33 #define BOLD 020 /* Bold */ 34 35 int must_use_uc, must_overstrike; 36 char *CURS_UP, *CURS_RIGHT, *CURS_LEFT, 37 *ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE, 38 *ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES; 39 40 struct CHAR { 41 char c_mode; 42 char c_char; 43 } ; 44 45 struct CHAR obuf[MAXBUF]; 46 int col, maxcol; 47 int mode; 48 int halfpos; 49 int upln; 50 int iflag; 51 52 int outchar(); 53 #define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar) 54 55 main(argc, argv) 56 int argc; 57 char **argv; 58 { 59 extern int optind; 60 extern char *optarg; 61 int c; 62 char *termtype; 63 FILE *f; 64 char termcap[1024]; 65 char *getenv(), *strcpy(); 66 67 termtype = getenv("TERM"); 68 if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1))) 69 termtype = "lpr"; 70 while ((c=getopt(argc, argv, "it:T:")) != EOF) 71 switch(c) { 72 73 case 't': 74 case 'T': /* for nroff compatibility */ 75 termtype = optarg; 76 break; 77 case 'i': 78 iflag = 1; 79 break; 80 81 default: 82 fprintf(stderr, 83 "usage: %s [ -i ] [ -tTerm ] file...\n", 84 argv[0]); 85 exit(1); 86 } 87 88 switch(tgetent(termcap, termtype)) { 89 90 case 1: 91 break; 92 93 default: 94 fprintf(stderr,"trouble reading termcap"); 95 /* fall through to ... */ 96 97 case 0: 98 /* No such terminal type - assume dumb */ 99 (void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:"); 100 break; 101 } 102 initcap(); 103 if ( (tgetflag("os") && ENTER_BOLD==NULL ) || 104 (tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL)) 105 must_overstrike = 1; 106 initbuf(); 107 if (optind == argc) 108 filter(stdin); 109 else for (; optind<argc; optind++) { 110 f = fopen(argv[optind],"r"); 111 if (f == NULL) { 112 perror(argv[optind]); 113 exit(1); 114 } else 115 filter(f); 116 } 117 exit(0); 118 } 119 120 filter(f) 121 FILE *f; 122 { 123 register c; 124 125 while ((c = getc(f)) != EOF) switch(c) { 126 127 case '\b': 128 if (col > 0) 129 col--; 130 continue; 131 132 case '\t': 133 col = (col+8) & ~07; 134 if (col > maxcol) 135 maxcol = col; 136 continue; 137 138 case '\r': 139 col = 0; 140 continue; 141 142 case SO: 143 mode |= ALTSET; 144 continue; 145 146 case SI: 147 mode &= ~ALTSET; 148 continue; 149 150 case IESC: 151 switch (c = getc(f)) { 152 153 case HREV: 154 if (halfpos == 0) { 155 mode |= SUPERSC; 156 halfpos--; 157 } else if (halfpos > 0) { 158 mode &= ~SUBSC; 159 halfpos--; 160 } else { 161 halfpos = 0; 162 reverse(); 163 } 164 continue; 165 166 case HFWD: 167 if (halfpos == 0) { 168 mode |= SUBSC; 169 halfpos++; 170 } else if (halfpos < 0) { 171 mode &= ~SUPERSC; 172 halfpos++; 173 } else { 174 halfpos = 0; 175 fwd(); 176 } 177 continue; 178 179 case FREV: 180 reverse(); 181 continue; 182 183 default: 184 fprintf(stderr, 185 "Unknown escape sequence in input: %o, %o\n", 186 IESC, c); 187 exit(1); 188 } 189 continue; 190 191 case '_': 192 if (obuf[col].c_char) 193 obuf[col].c_mode |= UNDERL | mode; 194 else 195 obuf[col].c_char = '_'; 196 case ' ': 197 col++; 198 if (col > maxcol) 199 maxcol = col; 200 continue; 201 202 case '\n': 203 flushln(); 204 continue; 205 206 case '\f': 207 flushln(); 208 putchar('\f'); 209 continue; 210 211 default: 212 if (c < ' ') /* non printing */ 213 continue; 214 if (obuf[col].c_char == '\0') { 215 obuf[col].c_char = c; 216 obuf[col].c_mode = mode; 217 } else if (obuf[col].c_char == '_') { 218 obuf[col].c_char = c; 219 obuf[col].c_mode |= UNDERL|mode; 220 } else if (obuf[col].c_char == c) 221 obuf[col].c_mode |= BOLD|mode; 222 else 223 obuf[col].c_mode = mode; 224 col++; 225 if (col > maxcol) 226 maxcol = col; 227 continue; 228 } 229 if (maxcol) 230 flushln(); 231 } 232 233 flushln() 234 { 235 register lastmode; 236 register i; 237 int hadmodes = 0; 238 239 lastmode = NORMAL; 240 for (i=0; i<maxcol; i++) { 241 if (obuf[i].c_mode != lastmode) { 242 hadmodes++; 243 setmode(obuf[i].c_mode); 244 lastmode = obuf[i].c_mode; 245 } 246 if (obuf[i].c_char == '\0') { 247 if (upln) 248 PRINT(CURS_RIGHT); 249 else 250 outc(' '); 251 } else 252 outc(obuf[i].c_char); 253 } 254 if (lastmode != NORMAL) { 255 setmode(0); 256 } 257 if (must_overstrike && hadmodes) 258 overstrike(); 259 putchar('\n'); 260 if (iflag && hadmodes) 261 iattr(); 262 (void)fflush(stdout); 263 if (upln) 264 upln--; 265 initbuf(); 266 } 267 268 /* 269 * For terminals that can overstrike, overstrike underlines and bolds. 270 * We don't do anything with halfline ups and downs, or Greek. 271 */ 272 overstrike() 273 { 274 register int i; 275 char lbuf[256]; 276 register char *cp = lbuf; 277 int hadbold=0; 278 279 /* Set up overstrike buffer */ 280 for (i=0; i<maxcol; i++) 281 switch (obuf[i].c_mode) { 282 case NORMAL: 283 default: 284 *cp++ = ' '; 285 break; 286 case UNDERL: 287 *cp++ = '_'; 288 break; 289 case BOLD: 290 *cp++ = obuf[i].c_char; 291 hadbold=1; 292 break; 293 } 294 putchar('\r'); 295 for (*cp=' '; *cp==' '; cp--) 296 *cp = 0; 297 for (cp=lbuf; *cp; cp++) 298 putchar(*cp); 299 if (hadbold) { 300 putchar('\r'); 301 for (cp=lbuf; *cp; cp++) 302 putchar(*cp=='_' ? ' ' : *cp); 303 putchar('\r'); 304 for (cp=lbuf; *cp; cp++) 305 putchar(*cp=='_' ? ' ' : *cp); 306 } 307 } 308 309 iattr() 310 { 311 register int i; 312 char lbuf[256]; 313 register char *cp = lbuf; 314 315 for (i=0; i<maxcol; i++) 316 switch (obuf[i].c_mode) { 317 case NORMAL: *cp++ = ' '; break; 318 case ALTSET: *cp++ = 'g'; break; 319 case SUPERSC: *cp++ = '^'; break; 320 case SUBSC: *cp++ = 'v'; break; 321 case UNDERL: *cp++ = '_'; break; 322 case BOLD: *cp++ = '!'; break; 323 default: *cp++ = 'X'; break; 324 } 325 for (*cp=' '; *cp==' '; cp--) 326 *cp = 0; 327 for (cp=lbuf; *cp; cp++) 328 putchar(*cp); 329 putchar('\n'); 330 } 331 332 initbuf() 333 { 334 335 bzero((char *)obuf, sizeof (obuf)); /* depends on NORMAL == 0 */ 336 col = 0; 337 maxcol = 0; 338 mode &= ALTSET; 339 } 340 341 fwd() 342 { 343 register oldcol, oldmax; 344 345 oldcol = col; 346 oldmax = maxcol; 347 flushln(); 348 col = oldcol; 349 maxcol = oldmax; 350 } 351 352 reverse() 353 { 354 upln++; 355 fwd(); 356 PRINT(CURS_UP); 357 PRINT(CURS_UP); 358 upln++; 359 } 360 361 initcap() 362 { 363 static char tcapbuf[512]; 364 char *bp = tcapbuf; 365 char *getenv(), *tgetstr(); 366 367 /* This nonsense attempts to work with both old and new termcap */ 368 CURS_UP = tgetstr("up", &bp); 369 CURS_RIGHT = tgetstr("ri", &bp); 370 if (CURS_RIGHT == NULL) 371 CURS_RIGHT = tgetstr("nd", &bp); 372 CURS_LEFT = tgetstr("le", &bp); 373 if (CURS_LEFT == NULL) 374 CURS_LEFT = tgetstr("bc", &bp); 375 if (CURS_LEFT == NULL && tgetflag("bs")) 376 CURS_LEFT = "\b"; 377 378 ENTER_STANDOUT = tgetstr("so", &bp); 379 EXIT_STANDOUT = tgetstr("se", &bp); 380 ENTER_UNDERLINE = tgetstr("us", &bp); 381 EXIT_UNDERLINE = tgetstr("ue", &bp); 382 ENTER_DIM = tgetstr("mh", &bp); 383 ENTER_BOLD = tgetstr("md", &bp); 384 ENTER_REVERSE = tgetstr("mr", &bp); 385 EXIT_ATTRIBUTES = tgetstr("me", &bp); 386 387 if (!ENTER_BOLD && ENTER_REVERSE) 388 ENTER_BOLD = ENTER_REVERSE; 389 if (!ENTER_BOLD && ENTER_STANDOUT) 390 ENTER_BOLD = ENTER_STANDOUT; 391 if (!ENTER_UNDERLINE && ENTER_STANDOUT) { 392 ENTER_UNDERLINE = ENTER_STANDOUT; 393 EXIT_UNDERLINE = EXIT_STANDOUT; 394 } 395 if (!ENTER_DIM && ENTER_STANDOUT) 396 ENTER_DIM = ENTER_STANDOUT; 397 if (!ENTER_REVERSE && ENTER_STANDOUT) 398 ENTER_REVERSE = ENTER_STANDOUT; 399 if (!EXIT_ATTRIBUTES && EXIT_STANDOUT) 400 EXIT_ATTRIBUTES = EXIT_STANDOUT; 401 402 /* 403 * Note that we use REVERSE for the alternate character set, 404 * not the as/ae capabilities. This is because we are modelling 405 * the model 37 teletype (since that's what nroff outputs) and 406 * the typical as/ae is more of a graphics set, not the greek 407 * letters the 37 has. 408 */ 409 410 UNDER_CHAR = tgetstr("uc", &bp); 411 must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE); 412 } 413 414 outchar(c) 415 int c; 416 { 417 putchar(c & 0177); 418 } 419 420 static int curmode = 0; 421 422 outc(c) 423 int c; 424 { 425 putchar(c); 426 if (must_use_uc && (curmode&UNDERL)) { 427 PRINT(CURS_LEFT); 428 PRINT(UNDER_CHAR); 429 } 430 } 431 432 setmode(newmode) 433 int newmode; 434 { 435 if (!iflag) { 436 if (curmode != NORMAL && newmode != NORMAL) 437 setmode(NORMAL); 438 switch (newmode) { 439 case NORMAL: 440 switch(curmode) { 441 case NORMAL: 442 break; 443 case UNDERL: 444 PRINT(EXIT_UNDERLINE); 445 break; 446 default: 447 /* This includes standout */ 448 PRINT(EXIT_ATTRIBUTES); 449 break; 450 } 451 break; 452 case ALTSET: 453 PRINT(ENTER_REVERSE); 454 break; 455 case SUPERSC: 456 /* 457 * This only works on a few terminals. 458 * It should be fixed. 459 */ 460 PRINT(ENTER_UNDERLINE); 461 PRINT(ENTER_DIM); 462 break; 463 case SUBSC: 464 PRINT(ENTER_DIM); 465 break; 466 case UNDERL: 467 PRINT(ENTER_UNDERLINE); 468 break; 469 case BOLD: 470 PRINT(ENTER_BOLD); 471 break; 472 default: 473 /* 474 * We should have some provision here for multiple modes 475 * on at once. This will have to come later. 476 */ 477 PRINT(ENTER_STANDOUT); 478 break; 479 } 480 } 481 curmode = newmode; 482 } 483