1/**************************************************************************** 2 * Copyright (c) 1998-2004,2005 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/* 36 * comp_scan.c --- Lexical scanner for terminfo compiler. 37 * 38 * _nc_reset_input() 39 * _nc_get_token() 40 * _nc_panic_mode() 41 * int _nc_syntax; 42 * int _nc_curr_line; 43 * long _nc_curr_file_pos; 44 * long _nc_comment_start; 45 * long _nc_comment_end; 46 */ 47 48#include <curses.priv.h> 49 50#include <ctype.h> 51#include <term_entry.h> 52#include <tic.h> 53 54MODULE_ID("$Id: comp_scan.c,v 1.76 2005/06/04 22:04:45 tom Exp $") 55 56/* 57 * Maximum length of string capability we'll accept before raising an error. 58 * Yes, there is a real capability in /etc/termcap this long, an "is". 59 */ 60#define MAXCAPLEN 600 61 62#define iswhite(ch) (ch == ' ' || ch == '\t') 63 64NCURSES_EXPORT_VAR(int) 65_nc_syntax = 0; /* termcap or terminfo? */ 66NCURSES_EXPORT_VAR(long) 67_nc_curr_file_pos = 0; /* file offset of current line */ 68NCURSES_EXPORT_VAR(long) 69_nc_comment_start = 0; /* start of comment range before name */ 70NCURSES_EXPORT_VAR(long) 71_nc_comment_end = 0; /* end of comment range before name */ 72NCURSES_EXPORT_VAR(long) 73_nc_start_line = 0; /* start line of current entry */ 74 75NCURSES_EXPORT_VAR(struct token) 76_nc_curr_token = 77{ 78 0, 0, 0 79}; 80 81/***************************************************************************** 82 * 83 * Token-grabbing machinery 84 * 85 *****************************************************************************/ 86 87static bool first_column; /* See 'next_char()' below */ 88static bool had_newline; 89static char separator; /* capability separator */ 90static int pushtype; /* type of pushback token */ 91static char *pushname; 92 93#if NCURSES_EXT_FUNCS 94NCURSES_EXPORT_VAR(bool) 95_nc_disable_period = FALSE; /* used by tic -a option */ 96#endif 97 98/***************************************************************************** 99 * 100 * Character-stream handling 101 * 102 *****************************************************************************/ 103 104#define LEXBUFSIZ 1024 105 106static char *bufptr; /* otherwise, the input buffer pointer */ 107static char *bufstart; /* start of buffer so we can compute offsets */ 108static FILE *yyin; /* scanner's input file descriptor */ 109 110/* 111 * _nc_reset_input() 112 * 113 * Resets the input-reading routines. Used on initialization, 114 * or after a seek has been done. Exactly one argument must be 115 * non-null. 116 */ 117 118NCURSES_EXPORT(void) 119_nc_reset_input(FILE *fp, char *buf) 120{ 121 pushtype = NO_PUSHBACK; 122 if (pushname != 0) 123 pushname[0] = '\0'; 124 yyin = fp; 125 bufstart = bufptr = buf; 126 _nc_curr_file_pos = 0L; 127 if (fp != 0) 128 _nc_curr_line = 0; 129 _nc_curr_col = 0; 130} 131 132/* 133 * int last_char() 134 * 135 * Returns the final nonblank character on the current input buffer 136 */ 137static int 138last_char(void) 139{ 140 size_t len = strlen(bufptr); 141 while (len--) { 142 if (!isspace(UChar(bufptr[len]))) 143 return bufptr[len]; 144 } 145 return 0; 146} 147 148/* 149 * int next_char() 150 * 151 * Returns the next character in the input stream. Comments and leading 152 * white space are stripped. 153 * 154 * The global state variable 'firstcolumn' is set TRUE if the character 155 * returned is from the first column of the input line. 156 * 157 * The global variable _nc_curr_line is incremented for each new line. 158 * The global variable _nc_curr_file_pos is set to the file offset of the 159 * beginning of each line. 160 */ 161 162static int 163next_char(void) 164{ 165 static char *result; 166 static size_t allocated; 167 int the_char; 168 169 if (!yyin) { 170 if (result != 0) { 171 FreeAndNull(result); 172 FreeAndNull(pushname); 173 allocated = 0; 174 } 175 /* 176 * An string with an embedded null will truncate the input. This is 177 * intentional (we don't read binary files here). 178 */ 179 if (bufptr == 0 || *bufptr == '\0') 180 return (EOF); 181 if (*bufptr == '\n') { 182 _nc_curr_line++; 183 _nc_curr_col = 0; 184 } else if (*bufptr == '\t') { 185 _nc_curr_col = (_nc_curr_col | 7); 186 } 187 } else if (!bufptr || !*bufptr) { 188 /* 189 * In theory this could be recoded to do its I/O one character at a 190 * time, saving the buffer space. In practice, this turns out to be 191 * quite hard to get completely right. Try it and see. If you 192 * succeed, don't forget to hack push_back() correspondingly. 193 */ 194 size_t used; 195 size_t len; 196 197 do { 198 bufstart = 0; 199 used = 0; 200 do { 201 if (used + (LEXBUFSIZ / 4) >= allocated) { 202 allocated += (allocated + LEXBUFSIZ); 203 result = typeRealloc(char, allocated, result); 204 if (result == 0) 205 return (EOF); 206 } 207 if (used == 0) 208 _nc_curr_file_pos = ftell(yyin); 209 210 if (fgets(result + used, (int) (allocated - used), yyin) != 0) { 211 bufstart = result; 212 if (used == 0) { 213 _nc_curr_line++; 214 _nc_curr_col = 0; 215 } 216 } else { 217 if (used != 0) 218 strcat(result, "\n"); 219 } 220 if ((bufptr = bufstart) != 0) { 221 used = strlen(bufptr); 222 while (iswhite(*bufptr)) { 223 if (*bufptr == '\t') { 224 _nc_curr_col = (_nc_curr_col | 7) + 1; 225 } else { 226 _nc_curr_col++; 227 } 228 bufptr++; 229 } 230 231 /* 232 * Treat a trailing <cr><lf> the same as a <newline> so we 233 * can read files on OS/2, etc. 234 */ 235 if ((len = strlen(bufptr)) > 1) { 236 if (bufptr[len - 1] == '\n' 237 && bufptr[len - 2] == '\r') { 238 len--; 239 bufptr[len - 1] = '\n'; 240 bufptr[len] = '\0'; 241 } 242 } 243 } else { 244 return (EOF); 245 } 246 } while (bufptr[len - 1] != '\n'); /* complete a line */ 247 } while (result[0] == '#'); /* ignore comments */ 248 } else if (*bufptr == '\t') { 249 _nc_curr_col = (_nc_curr_col | 7); 250 } 251 252 first_column = (bufptr == bufstart); 253 if (first_column) 254 had_newline = FALSE; 255 256 _nc_curr_col++; 257 the_char = *bufptr++; 258 return UChar(the_char); 259} 260 261static void 262push_back(char c) 263/* push a character back onto the input stream */ 264{ 265 if (bufptr == bufstart) 266 _nc_syserr_abort("Can't backspace off beginning of line"); 267 *--bufptr = c; 268 _nc_curr_col--; 269} 270 271static long 272stream_pos(void) 273/* return our current character position in the input stream */ 274{ 275 return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0)); 276} 277 278static bool 279end_of_stream(void) 280/* are we at end of input? */ 281{ 282 return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0')) 283 ? TRUE : FALSE); 284} 285 286/* Assume we may be looking at a termcap-style continuation */ 287static inline int 288eat_escaped_newline(int ch) 289{ 290 if (ch == '\\') 291 while ((ch = next_char()) == '\n' || iswhite(ch)) 292 continue; 293 return ch; 294} 295 296/* 297 * int 298 * get_token() 299 * 300 * Scans the input for the next token, storing the specifics in the 301 * global structure 'curr_token' and returning one of the following: 302 * 303 * NAMES A line beginning in column 1. 'name' 304 * will be set to point to everything up to but 305 * not including the first separator on the line. 306 * BOOLEAN An entry consisting of a name followed by 307 * a separator. 'name' will be set to point to 308 * the name of the capability. 309 * NUMBER An entry of the form 310 * name#digits, 311 * 'name' will be set to point to the capability 312 * name and 'valnumber' to the number given. 313 * STRING An entry of the form 314 * name=characters, 315 * 'name' is set to the capability name and 316 * 'valstring' to the string of characters, with 317 * input translations done. 318 * CANCEL An entry of the form 319 * name@, 320 * 'name' is set to the capability name and 321 * 'valnumber' to -1. 322 * EOF The end of the file has been reached. 323 * 324 * A `separator' is either a comma or a semicolon, depending on whether 325 * we are in termcap or terminfo mode. 326 * 327 */ 328 329NCURSES_EXPORT(int) 330_nc_get_token(bool silent) 331{ 332 static const char terminfo_punct[] = "@%&*!#"; 333 static char *buffer; 334 335 char *after_list; 336 char *after_name; 337 char *numchk; 338 char *ptr; 339 char *s; 340 char numbuf[80]; 341 int ch; 342 int dot_flag = FALSE; 343 int type; 344 long number; 345 long token_start; 346 unsigned found; 347#ifdef TRACE 348 int old_line; 349 int old_col; 350#endif 351 352 if (pushtype != NO_PUSHBACK) { 353 int retval = pushtype; 354 355 _nc_set_type(pushname != 0 ? pushname : ""); 356 DEBUG(3, ("pushed-back token: `%s', class %d", 357 _nc_curr_token.tk_name, pushtype)); 358 359 pushtype = NO_PUSHBACK; 360 if (pushname != 0) 361 pushname[0] = '\0'; 362 363 /* currtok wasn't altered by _nc_push_token() */ 364 return (retval); 365 } 366 367 if (end_of_stream()) { 368 yyin = 0; 369 next_char(); /* frees its allocated memory */ 370 if (buffer != 0) { 371 if (_nc_curr_token.tk_name == buffer) 372 _nc_curr_token.tk_name = 0; 373 FreeAndNull(buffer); 374 } 375 return (EOF); 376 } 377 378 start_token: 379 token_start = stream_pos(); 380 while ((ch = next_char()) == '\n' || iswhite(ch)) { 381 if (ch == '\n') 382 had_newline = TRUE; 383 continue; 384 } 385 386 ch = eat_escaped_newline(ch); 387 388#ifdef TRACE 389 old_line = _nc_curr_line; 390 old_col = _nc_curr_col; 391#endif 392 if (ch == EOF) 393 type = EOF; 394 else { 395 /* if this is a termcap entry, skip a leading separator */ 396 if (separator == ':' && ch == ':') 397 ch = next_char(); 398 399 if (ch == '.' 400#if NCURSES_EXT_FUNCS 401 && !_nc_disable_period 402#endif 403 ) { 404 dot_flag = TRUE; 405 DEBUG(8, ("dot-flag set")); 406 407 while ((ch = next_char()) == '.' || iswhite(ch)) 408 continue; 409 } 410 411 if (ch == EOF) { 412 type = EOF; 413 goto end_of_token; 414 } 415 416 /* have to make some punctuation chars legal for terminfo */ 417 if (!isalnum(UChar(ch)) 418#if NCURSES_EXT_FUNCS 419 && !(ch == '.' && _nc_disable_period) 420#endif 421 && !strchr(terminfo_punct, (char) ch)) { 422 if (!silent) 423 _nc_warning("Illegal character (expected alphanumeric or %s) - '%s'", 424 terminfo_punct, unctrl((chtype) ch)); 425 _nc_panic_mode(separator); 426 goto start_token; 427 } 428 429 if (buffer == 0) 430 buffer = typeMalloc(char, MAX_ENTRY_SIZE); 431 432#ifdef TRACE 433 old_line = _nc_curr_line; 434 old_col = _nc_curr_col; 435#endif 436 ptr = buffer; 437 *(ptr++) = ch; 438 439 if (first_column) { 440 _nc_comment_start = token_start; 441 _nc_comment_end = _nc_curr_file_pos; 442 _nc_start_line = _nc_curr_line; 443 444 _nc_syntax = ERR; 445 after_name = 0; 446 after_list = 0; 447 while ((ch = next_char()) != '\n') { 448 if (ch == EOF) { 449 _nc_err_abort(MSG_NO_INPUTS); 450 } else if (ch == '|') { 451 after_list = ptr; 452 if (after_name == 0) 453 after_name = ptr; 454 } else if (ch == ':' && last_char() != ',') { 455 _nc_syntax = SYN_TERMCAP; 456 separator = ':'; 457 break; 458 } else if (ch == ',') { 459 _nc_syntax = SYN_TERMINFO; 460 separator = ','; 461 /* 462 * If we did not see a '|', then we found a name with no 463 * aliases or description. 464 */ 465 if (after_name == 0) 466 break; 467 /* 468 * If we see a comma, we assume this is terminfo unless we 469 * subsequently run into a colon. But we don't stop 470 * looking for a colon until hitting a newline. This 471 * allows commas to be embedded in description fields of 472 * either syntax. 473 */ 474 } else 475 ch = eat_escaped_newline(ch); 476 477 *ptr++ = ch; 478 } 479 ptr[0] = '\0'; 480 if (_nc_syntax == ERR) { 481 /* 482 * Grrr...what we ought to do here is barf, complaining that 483 * the entry is malformed. But because a couple of name fields 484 * in the 8.2 termcap file end with |\, we just have to assume 485 * it's termcap syntax. 486 */ 487 _nc_syntax = SYN_TERMCAP; 488 separator = ':'; 489 } else if (_nc_syntax == SYN_TERMINFO) { 490 /* throw away trailing /, *$/ */ 491 for (--ptr; iswhite(*ptr) || *ptr == ','; ptr--) 492 continue; 493 ptr[1] = '\0'; 494 } 495 496 /* 497 * This is the soonest we have the terminal name fetched. Set up 498 * for following warning messages. If there's no '|', then there 499 * is no description. 500 */ 501 if (after_name != 0) { 502 ch = *after_name; 503 *after_name = '\0'; 504 _nc_set_type(buffer); 505 *after_name = ch; 506 } 507 508 /* 509 * Compute the boundary between the aliases and the description 510 * field for syntax-checking purposes. 511 */ 512 if (after_list != 0) { 513 if (!silent) { 514 if (*after_list == '\0') 515 _nc_warning("empty longname field"); 516 else if (strchr(after_list, ' ') == 0) 517 _nc_warning("older tic versions may treat the description field as an alias"); 518 } 519 } else { 520 after_list = buffer + strlen(buffer); 521 DEBUG(1, ("missing description")); 522 } 523 524 /* 525 * Whitespace in a name field other than the long name can confuse 526 * rdist and some termcap tools. Slashes are a no-no. Other 527 * special characters can be dangerous due to shell expansion. 528 */ 529 for (s = buffer; s < after_list; ++s) { 530 if (isspace(UChar(*s))) { 531 if (!silent) 532 _nc_warning("whitespace in name or alias field"); 533 break; 534 } else if (*s == '/') { 535 if (!silent) 536 _nc_warning("slashes aren't allowed in names or aliases"); 537 break; 538 } else if (strchr("$[]!*?", *s)) { 539 if (!silent) 540 _nc_warning("dubious character `%c' in name or alias field", *s); 541 break; 542 } 543 } 544 545 _nc_curr_token.tk_name = buffer; 546 type = NAMES; 547 } else { 548 if (had_newline && _nc_syntax == SYN_TERMCAP) { 549 _nc_warning("Missing backslash before newline"); 550 had_newline = FALSE; 551 } 552 while ((ch = next_char()) != EOF) { 553 if (!isalnum(UChar(ch))) { 554 if (_nc_syntax == SYN_TERMINFO) { 555 if (ch != '_') 556 break; 557 } else { /* allow ';' for "k;" */ 558 if (ch != ';') 559 break; 560 } 561 } 562 *(ptr++) = ch; 563 } 564 565 *ptr++ = '\0'; 566 switch (ch) { 567 case ',': 568 case ':': 569 if (ch != separator) 570 _nc_err_abort("Separator inconsistent with syntax"); 571 _nc_curr_token.tk_name = buffer; 572 type = BOOLEAN; 573 break; 574 case '@': 575 if ((ch = next_char()) != separator && !silent) 576 _nc_warning("Missing separator after `%s', have %s", 577 buffer, unctrl((chtype) ch)); 578 _nc_curr_token.tk_name = buffer; 579 type = CANCEL; 580 break; 581 582 case '#': 583 found = 0; 584 while (isalnum(ch = next_char())) { 585 numbuf[found++] = ch; 586 if (found >= sizeof(numbuf) - 1) 587 break; 588 } 589 numbuf[found] = '\0'; 590 number = strtol(numbuf, &numchk, 0); 591 if (!silent) { 592 if (numchk == numbuf) 593 _nc_warning("no value given for `%s'", buffer); 594 if ((*numchk != '\0') || (ch != separator)) 595 _nc_warning("Missing separator"); 596 } 597 _nc_curr_token.tk_name = buffer; 598 _nc_curr_token.tk_valnumber = number; 599 type = NUMBER; 600 break; 601 602 case '=': 603 ch = _nc_trans_string(ptr, buffer + MAX_ENTRY_SIZE); 604 if (!silent && ch != separator) 605 _nc_warning("Missing separator"); 606 _nc_curr_token.tk_name = buffer; 607 _nc_curr_token.tk_valstring = ptr; 608 type = STRING; 609 break; 610 611 case EOF: 612 type = EOF; 613 break; 614 default: 615 /* just to get rid of the compiler warning */ 616 type = UNDEF; 617 if (!silent) 618 _nc_warning("Illegal character - '%s'", unctrl((chtype) ch)); 619 } 620 } /* end else (first_column == FALSE) */ 621 } /* end else (ch != EOF) */ 622 623 end_of_token: 624 625#ifdef TRACE 626 if (dot_flag == TRUE) 627 DEBUG(8, ("Commented out ")); 628 629 if (_nc_tracing >= DEBUG_LEVEL(8)) { 630 _tracef("parsed %d.%d to %d.%d", 631 old_line, old_col, 632 _nc_curr_line, _nc_curr_col); 633 } 634 if (_nc_tracing >= DEBUG_LEVEL(7)) { 635 switch (type) { 636 case BOOLEAN: 637 _tracef("Token: Boolean; name='%s'", 638 _nc_curr_token.tk_name); 639 break; 640 641 case NUMBER: 642 _tracef("Token: Number; name='%s', value=%d", 643 _nc_curr_token.tk_name, 644 _nc_curr_token.tk_valnumber); 645 break; 646 647 case STRING: 648 _tracef("Token: String; name='%s', value=%s", 649 _nc_curr_token.tk_name, 650 _nc_visbuf(_nc_curr_token.tk_valstring)); 651 break; 652 653 case CANCEL: 654 _tracef("Token: Cancel; name='%s'", 655 _nc_curr_token.tk_name); 656 break; 657 658 case NAMES: 659 660 _tracef("Token: Names; value='%s'", 661 _nc_curr_token.tk_name); 662 break; 663 664 case EOF: 665 _tracef("Token: End of file"); 666 break; 667 668 default: 669 _nc_warning("Bad token type"); 670 } 671 } 672#endif 673 674 if (dot_flag == TRUE) /* if commented out, use the next one */ 675 type = _nc_get_token(silent); 676 677 DEBUG(3, ("token: `%s', class %d", 678 ((_nc_curr_token.tk_name != 0) 679 ? _nc_curr_token.tk_name 680 : "<null>"), 681 type)); 682 683 return (type); 684} 685 686/* 687 * char 688 * trans_string(ptr) 689 * 690 * Reads characters using next_char() until encountering a separator, nl, 691 * or end-of-file. The returned value is the character which caused 692 * reading to stop. The following translations are done on the input: 693 * 694 * ^X goes to ctrl-X (i.e. X & 037) 695 * {\E,\n,\r,\b,\t,\f} go to 696 * {ESCAPE,newline,carriage-return,backspace,tab,formfeed} 697 * {\^,\\} go to {carat,backslash} 698 * \ddd (for ddd = up to three octal digits) goes to the character ddd 699 * 700 * \e == \E 701 * \0 == \200 702 * 703 */ 704 705NCURSES_EXPORT(int) 706_nc_trans_string(char *ptr, char *last) 707{ 708 int count = 0; 709 int number = 0; 710 int i, c; 711 chtype ch, last_ch = '\0'; 712 bool ignored = FALSE; 713 bool long_warning = FALSE; 714 715 while ((ch = c = next_char()) != (chtype) separator && c != EOF) { 716 if (ptr == (last - 1)) 717 break; 718 if ((_nc_syntax == SYN_TERMCAP) && c == '\n') 719 break; 720 if (ch == '^' && last_ch != '%') { 721 ch = c = next_char(); 722 if (c == EOF) 723 _nc_err_abort(MSG_NO_INPUTS); 724 725 if (!(is7bits(ch) && isprint(ch))) { 726 _nc_warning("Illegal ^ character - '%s'", unctrl(ch)); 727 } 728 if (ch == '?') { 729 *(ptr++) = '\177'; 730 if (_nc_tracing) 731 _nc_warning("Allow ^? as synonym for \\177"); 732 } else { 733 if ((ch &= 037) == 0) 734 ch = 128; 735 *(ptr++) = (char) (ch); 736 } 737 } else if (ch == '\\') { 738 ch = c = next_char(); 739 if (c == EOF) 740 _nc_err_abort(MSG_NO_INPUTS); 741 742 if (ch >= '0' && ch <= '7') { 743 number = ch - '0'; 744 for (i = 0; i < 2; i++) { 745 ch = c = next_char(); 746 if (c == EOF) 747 _nc_err_abort(MSG_NO_INPUTS); 748 749 if (c < '0' || c > '7') { 750 if (isdigit(c)) { 751 _nc_warning("Non-octal digit `%c' in \\ sequence", c); 752 /* allow the digit; it'll do less harm */ 753 } else { 754 push_back((char) c); 755 break; 756 } 757 } 758 759 number = number * 8 + c - '0'; 760 } 761 762 if (number == 0) 763 number = 0200; 764 *(ptr++) = (char) number; 765 } else { 766 switch (c) { 767 case 'E': 768 case 'e': 769 *(ptr++) = '\033'; 770 break; 771 772 case 'a': 773 *(ptr++) = '\007'; 774 break; 775 776 case 'l': 777 case 'n': 778 *(ptr++) = '\n'; 779 break; 780 781 case 'r': 782 *(ptr++) = '\r'; 783 break; 784 785 case 'b': 786 *(ptr++) = '\010'; 787 break; 788 789 case 's': 790 *(ptr++) = ' '; 791 break; 792 793 case 'f': 794 *(ptr++) = '\014'; 795 break; 796 797 case 't': 798 *(ptr++) = '\t'; 799 break; 800 801 case '\\': 802 *(ptr++) = '\\'; 803 break; 804 805 case '^': 806 *(ptr++) = '^'; 807 break; 808 809 case ',': 810 *(ptr++) = ','; 811 break; 812 813 case ':': 814 *(ptr++) = ':'; 815 break; 816 817 case '\n': 818 continue; 819 820 default: 821 _nc_warning("Illegal character '%s' in \\ sequence", 822 unctrl(ch)); 823 /* FALLTHRU */ 824 case '|': 825 *(ptr++) = (char) ch; 826 } /* endswitch (ch) */ 827 } /* endelse (ch < '0' || ch > '7') */ 828 } 829 /* end else if (ch == '\\') */ 830 else if (ch == '\n' && (_nc_syntax == SYN_TERMINFO)) { 831 /* 832 * Newlines embedded in a terminfo string are ignored, provided 833 * that the next line begins with whitespace. 834 */ 835 ignored = TRUE; 836 } else { 837 *(ptr++) = (char) ch; 838 } 839 840 if (!ignored) { 841 if (_nc_curr_col <= 1) { 842 push_back(ch); 843 ch = '\n'; 844 break; 845 } 846 last_ch = ch; 847 count++; 848 } 849 ignored = FALSE; 850 851 if (count > MAXCAPLEN && !long_warning) { 852 _nc_warning("Very long string found. Missing separator?"); 853 long_warning = TRUE; 854 } 855 } /* end while */ 856 857 *ptr = '\0'; 858 859 return (ch); 860} 861 862/* 863 * _nc_push_token() 864 * 865 * Push a token of given type so that it will be reread by the next 866 * get_token() call. 867 */ 868 869NCURSES_EXPORT(void) 870_nc_push_token(int tokclass) 871{ 872 /* 873 * This implementation is kind of bogus, it will fail if we ever do more 874 * than one pushback at a time between get_token() calls. It relies on the 875 * fact that _nc_curr_token is static storage that nothing but 876 * _nc_get_token() touches. 877 */ 878 pushtype = tokclass; 879 if (pushname == 0) 880 pushname = typeMalloc(char, MAX_NAME_SIZE + 1); 881 _nc_get_type(pushname); 882 883 DEBUG(3, ("pushing token: `%s', class %d", 884 ((_nc_curr_token.tk_name != 0) 885 ? _nc_curr_token.tk_name 886 : "<null>"), 887 pushtype)); 888} 889 890/* 891 * Panic mode error recovery - skip everything until a "ch" is found. 892 */ 893NCURSES_EXPORT(void) 894_nc_panic_mode(char ch) 895{ 896 int c; 897 898 for (;;) { 899 c = next_char(); 900 if (c == ch) 901 return; 902 if (c == EOF) 903 return; 904 } 905} 906 907#if NO_LEAKS 908NCURSES_EXPORT(void) 909_nc_comp_scan_leaks(void) 910{ 911 FreeAndNull(pushname); 912} 913#endif 914