1 /**************************************************************************** 2 * Copyright (c) 1998-2006,2008 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 1996 on * 33 ****************************************************************************/ 34 35 /* $FreeBSD$ */ 36 37 /* 38 * comp_scan.c --- Lexical scanner for terminfo compiler. 39 * 40 * _nc_reset_input() 41 * _nc_get_token() 42 * _nc_panic_mode() 43 * int _nc_syntax; 44 * int _nc_curr_line; 45 * long _nc_curr_file_pos; 46 * long _nc_comment_start; 47 * long _nc_comment_end; 48 */ 49 50 #include <curses.priv.h> 51 52 #include <ctype.h> 53 #include <term_entry.h> 54 #include <tic.h> 55 56 MODULE_ID("$Id: comp_scan.c,v 1.83 2008/08/16 19:22:55 tom Exp $") 57 58 /* 59 * Maximum length of string capability we'll accept before raising an error. 60 * Yes, there is a real capability in /etc/termcap this long, an "is". 61 */ 62 #define MAXCAPLEN 600 63 64 #define iswhite(ch) (ch == ' ' || ch == '\t') 65 66 NCURSES_EXPORT_VAR(int) 67 _nc_syntax = 0; /* termcap or terminfo? */ 68 NCURSES_EXPORT_VAR(long) 69 _nc_curr_file_pos = 0; /* file offset of current line */ 70 NCURSES_EXPORT_VAR(long) 71 _nc_comment_start = 0; /* start of comment range before name */ 72 NCURSES_EXPORT_VAR(long) 73 _nc_comment_end = 0; /* end of comment range before name */ 74 NCURSES_EXPORT_VAR(long) 75 _nc_start_line = 0; /* start line of current entry */ 76 77 NCURSES_EXPORT_VAR(struct token) 78 _nc_curr_token = 79 { 80 0, 0, 0 81 }; 82 83 /***************************************************************************** 84 * 85 * Token-grabbing machinery 86 * 87 *****************************************************************************/ 88 89 static bool first_column; /* See 'next_char()' below */ 90 static bool had_newline; 91 static char separator; /* capability separator */ 92 static int pushtype; /* type of pushback token */ 93 static char *pushname; 94 95 #if NCURSES_EXT_FUNCS 96 NCURSES_EXPORT_VAR(bool) 97 _nc_disable_period = FALSE; /* used by tic -a option */ 98 #endif 99 100 /***************************************************************************** 101 * 102 * Character-stream handling 103 * 104 *****************************************************************************/ 105 106 #define LEXBUFSIZ 1024 107 108 static char *bufptr; /* otherwise, the input buffer pointer */ 109 static char *bufstart; /* start of buffer so we can compute offsets */ 110 static FILE *yyin; /* scanner's input file descriptor */ 111 112 /* 113 * _nc_reset_input() 114 * 115 * Resets the input-reading routines. Used on initialization, 116 * or after a seek has been done. Exactly one argument must be 117 * non-null. 118 */ 119 120 NCURSES_EXPORT(void) 121 _nc_reset_input(FILE *fp, char *buf) 122 { 123 pushtype = NO_PUSHBACK; 124 if (pushname != 0) 125 pushname[0] = '\0'; 126 yyin = fp; 127 bufstart = bufptr = buf; 128 _nc_curr_file_pos = 0L; 129 if (fp != 0) 130 _nc_curr_line = 0; 131 _nc_curr_col = 0; 132 } 133 134 /* 135 * int last_char() 136 * 137 * Returns the final nonblank character on the current input buffer 138 */ 139 static int 140 last_char(void) 141 { 142 size_t len = strlen(bufptr); 143 while (len--) { 144 if (!isspace(UChar(bufptr[len]))) 145 return bufptr[len]; 146 } 147 return 0; 148 } 149 150 /* 151 * int next_char() 152 * 153 * Returns the next character in the input stream. Comments and leading 154 * white space are stripped. 155 * 156 * The global state variable 'firstcolumn' is set TRUE if the character 157 * returned is from the first column of the input line. 158 * 159 * The global variable _nc_curr_line is incremented for each new line. 160 * The global variable _nc_curr_file_pos is set to the file offset of the 161 * beginning of each line. 162 */ 163 164 static int 165 next_char(void) 166 { 167 static char *result; 168 static size_t allocated; 169 int the_char; 170 171 if (!yyin) { 172 if (result != 0) { 173 FreeAndNull(result); 174 FreeAndNull(pushname); 175 allocated = 0; 176 } 177 /* 178 * An string with an embedded null will truncate the input. This is 179 * intentional (we don't read binary files here). 180 */ 181 if (bufptr == 0 || *bufptr == '\0') 182 return (EOF); 183 if (*bufptr == '\n') { 184 _nc_curr_line++; 185 _nc_curr_col = 0; 186 } else if (*bufptr == '\t') { 187 _nc_curr_col = (_nc_curr_col | 7); 188 } 189 } else if (!bufptr || !*bufptr) { 190 /* 191 * In theory this could be recoded to do its I/O one character at a 192 * time, saving the buffer space. In practice, this turns out to be 193 * quite hard to get completely right. Try it and see. If you 194 * succeed, don't forget to hack push_back() correspondingly. 195 */ 196 size_t used; 197 size_t len; 198 199 do { 200 bufstart = 0; 201 used = 0; 202 do { 203 if (used + (LEXBUFSIZ / 4) >= allocated) { 204 allocated += (allocated + LEXBUFSIZ); 205 result = typeRealloc(char, allocated, result); 206 if (result == 0) 207 return (EOF); 208 bufstart = result; 209 } 210 if (used == 0) 211 _nc_curr_file_pos = ftell(yyin); 212 213 if (fgets(result + used, (int) (allocated - used), yyin) != 0) { 214 bufstart = result; 215 if (used == 0) { 216 _nc_curr_line++; 217 _nc_curr_col = 0; 218 } 219 } else { 220 if (used != 0) 221 strcat(result, "\n"); 222 } 223 if ((bufptr = bufstart) != 0) { 224 used = strlen(bufptr); 225 while (iswhite(*bufptr)) { 226 if (*bufptr == '\t') { 227 _nc_curr_col = (_nc_curr_col | 7) + 1; 228 } else { 229 _nc_curr_col++; 230 } 231 bufptr++; 232 } 233 234 /* 235 * Treat a trailing <cr><lf> the same as a <newline> so we 236 * can read files on OS/2, etc. 237 */ 238 if ((len = strlen(bufptr)) > 1) { 239 if (bufptr[len - 1] == '\n' 240 && bufptr[len - 2] == '\r') { 241 len--; 242 bufptr[len - 1] = '\n'; 243 bufptr[len] = '\0'; 244 } 245 } 246 } else { 247 return (EOF); 248 } 249 } while (bufptr[len - 1] != '\n'); /* complete a line */ 250 } while (result[0] == '#'); /* ignore comments */ 251 } else if (*bufptr == '\t') { 252 _nc_curr_col = (_nc_curr_col | 7); 253 } 254 255 first_column = (bufptr == bufstart); 256 if (first_column) 257 had_newline = FALSE; 258 259 _nc_curr_col++; 260 the_char = *bufptr++; 261 return UChar(the_char); 262 } 263 264 static void 265 push_back(char c) 266 /* push a character back onto the input stream */ 267 { 268 if (bufptr == bufstart) 269 _nc_syserr_abort("Can't backspace off beginning of line"); 270 *--bufptr = c; 271 _nc_curr_col--; 272 } 273 274 static long 275 stream_pos(void) 276 /* return our current character position in the input stream */ 277 { 278 return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0)); 279 } 280 281 static bool 282 end_of_stream(void) 283 /* are we at end of input? */ 284 { 285 return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0')) 286 ? TRUE : FALSE); 287 } 288 289 /* Assume we may be looking at a termcap-style continuation */ 290 static NCURSES_INLINE int 291 eat_escaped_newline(int ch) 292 { 293 if (ch == '\\') 294 while ((ch = next_char()) == '\n' || iswhite(ch)) 295 continue; 296 return ch; 297 } 298 299 #define TOK_BUF_SIZE MAX_ENTRY_SIZE 300 301 #define OkToAdd() \ 302 ((tok_ptr - tok_buf) < (TOK_BUF_SIZE - 2)) 303 304 #define AddCh(ch) \ 305 *tok_ptr++ = (char) ch; \ 306 *tok_ptr = '\0' 307 308 /* 309 * int 310 * get_token() 311 * 312 * Scans the input for the next token, storing the specifics in the 313 * global structure 'curr_token' and returning one of the following: 314 * 315 * NAMES A line beginning in column 1. 'name' 316 * will be set to point to everything up to but 317 * not including the first separator on the line. 318 * BOOLEAN An entry consisting of a name followed by 319 * a separator. 'name' will be set to point to 320 * the name of the capability. 321 * NUMBER An entry of the form 322 * name#digits, 323 * 'name' will be set to point to the capability 324 * name and 'valnumber' to the number given. 325 * STRING An entry of the form 326 * name=characters, 327 * 'name' is set to the capability name and 328 * 'valstring' to the string of characters, with 329 * input translations done. 330 * CANCEL An entry of the form 331 * name@, 332 * 'name' is set to the capability name and 333 * 'valnumber' to -1. 334 * EOF The end of the file has been reached. 335 * 336 * A `separator' is either a comma or a semicolon, depending on whether 337 * we are in termcap or terminfo mode. 338 * 339 */ 340 341 NCURSES_EXPORT(int) 342 _nc_get_token(bool silent) 343 { 344 static const char terminfo_punct[] = "@%&*!#"; 345 static char *tok_buf; 346 347 char *after_list; 348 char *after_name; 349 char *numchk; 350 char *tok_ptr; 351 char *s; 352 char numbuf[80]; 353 int ch; 354 int dot_flag = FALSE; 355 int type; 356 long number; 357 long token_start; 358 unsigned found; 359 #ifdef TRACE 360 int old_line; 361 int old_col; 362 #endif 363 364 if (pushtype != NO_PUSHBACK) { 365 int retval = pushtype; 366 367 _nc_set_type(pushname != 0 ? pushname : ""); 368 DEBUG(3, ("pushed-back token: `%s', class %d", 369 _nc_curr_token.tk_name, pushtype)); 370 371 pushtype = NO_PUSHBACK; 372 if (pushname != 0) 373 pushname[0] = '\0'; 374 375 /* currtok wasn't altered by _nc_push_token() */ 376 return (retval); 377 } 378 379 if (end_of_stream()) { 380 yyin = 0; 381 next_char(); /* frees its allocated memory */ 382 if (tok_buf != 0) { 383 if (_nc_curr_token.tk_name == tok_buf) 384 _nc_curr_token.tk_name = 0; 385 FreeAndNull(tok_buf); 386 } 387 return (EOF); 388 } 389 390 start_token: 391 token_start = stream_pos(); 392 while ((ch = next_char()) == '\n' || iswhite(ch)) { 393 if (ch == '\n') 394 had_newline = TRUE; 395 continue; 396 } 397 398 ch = eat_escaped_newline(ch); 399 400 #ifdef TRACE 401 old_line = _nc_curr_line; 402 old_col = _nc_curr_col; 403 #endif 404 if (ch == EOF) 405 type = EOF; 406 else { 407 /* if this is a termcap entry, skip a leading separator */ 408 if (separator == ':' && ch == ':') 409 ch = next_char(); 410 411 if (ch == '.' 412 #if NCURSES_EXT_FUNCS 413 && !_nc_disable_period 414 #endif 415 ) { 416 dot_flag = TRUE; 417 DEBUG(8, ("dot-flag set")); 418 419 while ((ch = next_char()) == '.' || iswhite(ch)) 420 continue; 421 } 422 423 if (ch == EOF) { 424 type = EOF; 425 goto end_of_token; 426 } 427 428 /* have to make some punctuation chars legal for terminfo */ 429 if (!isalnum(UChar(ch)) 430 #if NCURSES_EXT_FUNCS 431 && !(ch == '.' && _nc_disable_period) 432 #endif 433 && !strchr(terminfo_punct, (char) ch)) { 434 if (!silent) 435 _nc_warning("Illegal character (expected alphanumeric or %s) - '%s'", 436 terminfo_punct, unctrl((chtype) ch)); 437 _nc_panic_mode(separator); 438 goto start_token; 439 } 440 441 if (tok_buf == 0) 442 tok_buf = typeMalloc(char, TOK_BUF_SIZE); 443 444 #ifdef TRACE 445 old_line = _nc_curr_line; 446 old_col = _nc_curr_col; 447 #endif 448 tok_ptr = tok_buf; 449 AddCh(ch); 450 451 if (first_column) { 452 _nc_comment_start = token_start; 453 _nc_comment_end = _nc_curr_file_pos; 454 _nc_start_line = _nc_curr_line; 455 456 _nc_syntax = ERR; 457 after_name = 0; 458 after_list = 0; 459 while ((ch = next_char()) != '\n') { 460 if (ch == EOF) { 461 _nc_err_abort(MSG_NO_INPUTS); 462 } else if (ch == '|') { 463 after_list = tok_ptr; 464 if (after_name == 0) 465 after_name = tok_ptr; 466 } else if (ch == ':' && last_char() != ',') { 467 _nc_syntax = SYN_TERMCAP; 468 separator = ':'; 469 break; 470 } else if (ch == ',') { 471 _nc_syntax = SYN_TERMINFO; 472 separator = ','; 473 /* 474 * If we did not see a '|', then we found a name with no 475 * aliases or description. 476 */ 477 if (after_name == 0) 478 break; 479 /* 480 * If we see a comma, we assume this is terminfo unless we 481 * subsequently run into a colon. But we don't stop 482 * looking for a colon until hitting a newline. This 483 * allows commas to be embedded in description fields of 484 * either syntax. 485 */ 486 } else 487 ch = eat_escaped_newline(ch); 488 489 if (OkToAdd()) { 490 AddCh(ch); 491 } else { 492 ch = EOF; 493 break; 494 } 495 } 496 *tok_ptr = '\0'; 497 if (_nc_syntax == ERR) { 498 /* 499 * Grrr...what we ought to do here is barf, complaining that 500 * the entry is malformed. But because a couple of name fields 501 * in the 8.2 termcap file end with |\, we just have to assume 502 * it's termcap syntax. 503 */ 504 _nc_syntax = SYN_TERMCAP; 505 separator = ':'; 506 } else if (_nc_syntax == SYN_TERMINFO) { 507 /* throw away trailing /, *$/ */ 508 for (--tok_ptr; 509 iswhite(*tok_ptr) || *tok_ptr == ','; 510 tok_ptr--) 511 continue; 512 tok_ptr[1] = '\0'; 513 } 514 515 /* 516 * This is the soonest we have the terminal name fetched. Set up 517 * for following warning messages. If there's no '|', then there 518 * is no description. 519 */ 520 if (after_name != 0) { 521 ch = *after_name; 522 *after_name = '\0'; 523 _nc_set_type(tok_buf); 524 *after_name = (char) ch; 525 } 526 527 /* 528 * Compute the boundary between the aliases and the description 529 * field for syntax-checking purposes. 530 */ 531 if (after_list != 0) { 532 if (!silent) { 533 if (*after_list == '\0') 534 _nc_warning("empty longname field"); 535 #ifndef FREEBSD_NATIVE 536 else if (strchr(after_list, ' ') == 0) 537 _nc_warning("older tic versions may treat the description field as an alias"); 538 #endif 539 } 540 } else { 541 after_list = tok_buf + strlen(tok_buf); 542 DEBUG(1, ("missing description")); 543 } 544 545 /* 546 * Whitespace in a name field other than the long name can confuse 547 * rdist and some termcap tools. Slashes are a no-no. Other 548 * special characters can be dangerous due to shell expansion. 549 */ 550 for (s = tok_buf; s < after_list; ++s) { 551 if (isspace(UChar(*s))) { 552 if (!silent) 553 _nc_warning("whitespace in name or alias field"); 554 break; 555 } else if (*s == '/') { 556 if (!silent) 557 _nc_warning("slashes aren't allowed in names or aliases"); 558 break; 559 } else if (strchr("$[]!*?", *s)) { 560 if (!silent) 561 _nc_warning("dubious character `%c' in name or alias field", *s); 562 break; 563 } 564 } 565 566 _nc_curr_token.tk_name = tok_buf; 567 type = NAMES; 568 } else { 569 if (had_newline && _nc_syntax == SYN_TERMCAP) { 570 _nc_warning("Missing backslash before newline"); 571 had_newline = FALSE; 572 } 573 while ((ch = next_char()) != EOF) { 574 if (!isalnum(UChar(ch))) { 575 if (_nc_syntax == SYN_TERMINFO) { 576 if (ch != '_') 577 break; 578 } else { /* allow ';' for "k;" */ 579 if (ch != ';') 580 break; 581 } 582 } 583 if (OkToAdd()) { 584 AddCh(ch); 585 } else { 586 ch = EOF; 587 break; 588 } 589 } 590 591 *tok_ptr++ = '\0'; /* separate name/value in buffer */ 592 switch (ch) { 593 case ',': 594 case ':': 595 if (ch != separator) 596 _nc_err_abort("Separator inconsistent with syntax"); 597 _nc_curr_token.tk_name = tok_buf; 598 type = BOOLEAN; 599 break; 600 case '@': 601 if ((ch = next_char()) != separator && !silent) 602 _nc_warning("Missing separator after `%s', have %s", 603 tok_buf, unctrl((chtype) ch)); 604 _nc_curr_token.tk_name = tok_buf; 605 type = CANCEL; 606 break; 607 608 case '#': 609 found = 0; 610 while (isalnum(ch = next_char())) { 611 numbuf[found++] = (char) ch; 612 if (found >= sizeof(numbuf) - 1) 613 break; 614 } 615 numbuf[found] = '\0'; 616 number = strtol(numbuf, &numchk, 0); 617 if (!silent) { 618 if (numchk == numbuf) 619 _nc_warning("no value given for `%s'", tok_buf); 620 if ((*numchk != '\0') || (ch != separator)) 621 _nc_warning("Missing separator"); 622 } 623 _nc_curr_token.tk_name = tok_buf; 624 _nc_curr_token.tk_valnumber = number; 625 type = NUMBER; 626 break; 627 628 case '=': 629 ch = _nc_trans_string(tok_ptr, tok_buf + TOK_BUF_SIZE); 630 if (!silent && ch != separator) 631 _nc_warning("Missing separator"); 632 _nc_curr_token.tk_name = tok_buf; 633 _nc_curr_token.tk_valstring = tok_ptr; 634 type = STRING; 635 break; 636 637 case EOF: 638 type = EOF; 639 break; 640 default: 641 /* just to get rid of the compiler warning */ 642 type = UNDEF; 643 if (!silent) 644 _nc_warning("Illegal character - '%s'", unctrl((chtype) ch)); 645 } 646 } /* end else (first_column == FALSE) */ 647 } /* end else (ch != EOF) */ 648 649 end_of_token: 650 651 #ifdef TRACE 652 if (dot_flag == TRUE) 653 DEBUG(8, ("Commented out ")); 654 655 if (_nc_tracing >= DEBUG_LEVEL(8)) { 656 _tracef("parsed %d.%d to %d.%d", 657 old_line, old_col, 658 _nc_curr_line, _nc_curr_col); 659 } 660 if (_nc_tracing >= DEBUG_LEVEL(7)) { 661 switch (type) { 662 case BOOLEAN: 663 _tracef("Token: Boolean; name='%s'", 664 _nc_curr_token.tk_name); 665 break; 666 667 case NUMBER: 668 _tracef("Token: Number; name='%s', value=%d", 669 _nc_curr_token.tk_name, 670 _nc_curr_token.tk_valnumber); 671 break; 672 673 case STRING: 674 _tracef("Token: String; name='%s', value=%s", 675 _nc_curr_token.tk_name, 676 _nc_visbuf(_nc_curr_token.tk_valstring)); 677 break; 678 679 case CANCEL: 680 _tracef("Token: Cancel; name='%s'", 681 _nc_curr_token.tk_name); 682 break; 683 684 case NAMES: 685 686 _tracef("Token: Names; value='%s'", 687 _nc_curr_token.tk_name); 688 break; 689 690 case EOF: 691 _tracef("Token: End of file"); 692 break; 693 694 default: 695 _nc_warning("Bad token type"); 696 } 697 } 698 #endif 699 700 if (dot_flag == TRUE) /* if commented out, use the next one */ 701 type = _nc_get_token(silent); 702 703 DEBUG(3, ("token: `%s', class %d", 704 ((_nc_curr_token.tk_name != 0) 705 ? _nc_curr_token.tk_name 706 : "<null>"), 707 type)); 708 709 return (type); 710 } 711 712 /* 713 * char 714 * trans_string(ptr) 715 * 716 * Reads characters using next_char() until encountering a separator, nl, 717 * or end-of-file. The returned value is the character which caused 718 * reading to stop. The following translations are done on the input: 719 * 720 * ^X goes to ctrl-X (i.e. X & 037) 721 * {\E,\n,\r,\b,\t,\f} go to 722 * {ESCAPE,newline,carriage-return,backspace,tab,formfeed} 723 * {\^,\\} go to {carat,backslash} 724 * \ddd (for ddd = up to three octal digits) goes to the character ddd 725 * 726 * \e == \E 727 * \0 == \200 728 * 729 */ 730 731 NCURSES_EXPORT(int) 732 _nc_trans_string(char *ptr, char *last) 733 { 734 int count = 0; 735 int number = 0; 736 int i, c; 737 chtype ch, last_ch = '\0'; 738 bool ignored = FALSE; 739 bool long_warning = FALSE; 740 741 while ((ch = c = next_char()) != (chtype) separator && c != EOF) { 742 if (ptr >= (last - 1)) { 743 if (c != EOF) { 744 while ((c = next_char()) != separator && c != EOF) { 745 ; 746 } 747 ch = c; 748 } 749 break; 750 } 751 if ((_nc_syntax == SYN_TERMCAP) && c == '\n') 752 break; 753 if (ch == '^' && last_ch != '%') { 754 ch = c = next_char(); 755 if (c == EOF) 756 _nc_err_abort(MSG_NO_INPUTS); 757 758 if (!(is7bits(ch) && isprint(ch))) { 759 _nc_warning("Illegal ^ character - '%s'", unctrl(ch)); 760 } 761 if (ch == '?') { 762 *(ptr++) = '\177'; 763 if (_nc_tracing) 764 _nc_warning("Allow ^? as synonym for \\177"); 765 } else { 766 if ((ch &= 037) == 0) 767 ch = 128; 768 *(ptr++) = (char) (ch); 769 } 770 } else if (ch == '\\') { 771 ch = c = next_char(); 772 if (c == EOF) 773 _nc_err_abort(MSG_NO_INPUTS); 774 775 if (ch >= '0' && ch <= '7') { 776 number = ch - '0'; 777 for (i = 0; i < 2; i++) { 778 ch = c = next_char(); 779 if (c == EOF) 780 _nc_err_abort(MSG_NO_INPUTS); 781 782 if (c < '0' || c > '7') { 783 if (isdigit(c)) { 784 _nc_warning("Non-octal digit `%c' in \\ sequence", c); 785 /* allow the digit; it'll do less harm */ 786 } else { 787 push_back((char) c); 788 break; 789 } 790 } 791 792 number = number * 8 + c - '0'; 793 } 794 795 if (number == 0) 796 number = 0200; 797 *(ptr++) = (char) number; 798 } else { 799 switch (c) { 800 case 'E': 801 case 'e': 802 *(ptr++) = '\033'; 803 break; 804 805 case 'a': 806 *(ptr++) = '\007'; 807 break; 808 809 case 'l': 810 case 'n': 811 *(ptr++) = '\n'; 812 break; 813 814 case 'r': 815 *(ptr++) = '\r'; 816 break; 817 818 case 'b': 819 *(ptr++) = '\010'; 820 break; 821 822 case 's': 823 *(ptr++) = ' '; 824 break; 825 826 case 'f': 827 *(ptr++) = '\014'; 828 break; 829 830 case 't': 831 *(ptr++) = '\t'; 832 break; 833 834 case '\\': 835 *(ptr++) = '\\'; 836 break; 837 838 case '^': 839 *(ptr++) = '^'; 840 break; 841 842 case ',': 843 *(ptr++) = ','; 844 break; 845 846 case ':': 847 *(ptr++) = ':'; 848 break; 849 850 case '\n': 851 continue; 852 853 default: 854 _nc_warning("Illegal character '%s' in \\ sequence", 855 unctrl(ch)); 856 /* FALLTHRU */ 857 case '|': 858 *(ptr++) = (char) ch; 859 } /* endswitch (ch) */ 860 } /* endelse (ch < '0' || ch > '7') */ 861 } 862 /* end else if (ch == '\\') */ 863 else if (ch == '\n' && (_nc_syntax == SYN_TERMINFO)) { 864 /* 865 * Newlines embedded in a terminfo string are ignored, provided 866 * that the next line begins with whitespace. 867 */ 868 ignored = TRUE; 869 } else { 870 *(ptr++) = (char) ch; 871 } 872 873 if (!ignored) { 874 if (_nc_curr_col <= 1) { 875 push_back((char) ch); 876 ch = '\n'; 877 break; 878 } 879 last_ch = ch; 880 count++; 881 } 882 ignored = FALSE; 883 884 if (count > MAXCAPLEN && !long_warning) { 885 _nc_warning("Very long string found. Missing separator?"); 886 long_warning = TRUE; 887 } 888 } /* end while */ 889 890 *ptr = '\0'; 891 892 return (ch); 893 } 894 895 /* 896 * _nc_push_token() 897 * 898 * Push a token of given type so that it will be reread by the next 899 * get_token() call. 900 */ 901 902 NCURSES_EXPORT(void) 903 _nc_push_token(int tokclass) 904 { 905 /* 906 * This implementation is kind of bogus, it will fail if we ever do more 907 * than one pushback at a time between get_token() calls. It relies on the 908 * fact that _nc_curr_token is static storage that nothing but 909 * _nc_get_token() touches. 910 */ 911 pushtype = tokclass; 912 if (pushname == 0) 913 pushname = typeMalloc(char, MAX_NAME_SIZE + 1); 914 _nc_get_type(pushname); 915 916 DEBUG(3, ("pushing token: `%s', class %d", 917 ((_nc_curr_token.tk_name != 0) 918 ? _nc_curr_token.tk_name 919 : "<null>"), 920 pushtype)); 921 } 922 923 /* 924 * Panic mode error recovery - skip everything until a "ch" is found. 925 */ 926 NCURSES_EXPORT(void) 927 _nc_panic_mode(char ch) 928 { 929 int c; 930 931 for (;;) { 932 c = next_char(); 933 if (c == ch) 934 return; 935 if (c == EOF) 936 return; 937 } 938 } 939 940 #if NO_LEAKS 941 NCURSES_EXPORT(void) 942 _nc_comp_scan_leaks(void) 943 { 944 if (pushname != 0) { 945 FreeAndNull(pushname); 946 } 947 } 948 #endif 949