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 /* 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 54 MODULE_ID("$Id: comp_scan.c,v 1.83 2008/08/16 19:22:55 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 64 NCURSES_EXPORT_VAR(int) 65 _nc_syntax = 0; /* termcap or terminfo? */ 66 NCURSES_EXPORT_VAR(long) 67 _nc_curr_file_pos = 0; /* file offset of current line */ 68 NCURSES_EXPORT_VAR(long) 69 _nc_comment_start = 0; /* start of comment range before name */ 70 NCURSES_EXPORT_VAR(long) 71 _nc_comment_end = 0; /* end of comment range before name */ 72 NCURSES_EXPORT_VAR(long) 73 _nc_start_line = 0; /* start line of current entry */ 74 75 NCURSES_EXPORT_VAR(struct token) 76 _nc_curr_token = 77 { 78 0, 0, 0 79 }; 80 81 /***************************************************************************** 82 * 83 * Token-grabbing machinery 84 * 85 *****************************************************************************/ 86 87 static bool first_column; /* See 'next_char()' below */ 88 static bool had_newline; 89 static char separator; /* capability separator */ 90 static int pushtype; /* type of pushback token */ 91 static char *pushname; 92 93 #if NCURSES_EXT_FUNCS 94 NCURSES_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 105 106 static char *bufptr; /* otherwise, the input buffer pointer */ 107 static char *bufstart; /* start of buffer so we can compute offsets */ 108 static 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 */ 117 118 NCURSES_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 */ 137 static int 138 last_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 */ 161 162 static int 163 next_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 bufstart = result; 207 } 208 if (used == 0) 209 _nc_curr_file_pos = ftell(yyin); 210 211 if (fgets(result + used, (int) (allocated - used), yyin) != 0) { 212 bufstart = result; 213 if (used == 0) { 214 _nc_curr_line++; 215 _nc_curr_col = 0; 216 } 217 } else { 218 if (used != 0) 219 strcat(result, "\n"); 220 } 221 if ((bufptr = bufstart) != 0) { 222 used = strlen(bufptr); 223 while (iswhite(*bufptr)) { 224 if (*bufptr == '\t') { 225 _nc_curr_col = (_nc_curr_col | 7) + 1; 226 } else { 227 _nc_curr_col++; 228 } 229 bufptr++; 230 } 231 232 /* 233 * Treat a trailing <cr><lf> the same as a <newline> so we 234 * can read files on OS/2, etc. 235 */ 236 if ((len = strlen(bufptr)) > 1) { 237 if (bufptr[len - 1] == '\n' 238 && bufptr[len - 2] == '\r') { 239 len--; 240 bufptr[len - 1] = '\n'; 241 bufptr[len] = '\0'; 242 } 243 } 244 } else { 245 return (EOF); 246 } 247 } while (bufptr[len - 1] != '\n'); /* complete a line */ 248 } while (result[0] == '#'); /* ignore comments */ 249 } else if (*bufptr == '\t') { 250 _nc_curr_col = (_nc_curr_col | 7); 251 } 252 253 first_column = (bufptr == bufstart); 254 if (first_column) 255 had_newline = FALSE; 256 257 _nc_curr_col++; 258 the_char = *bufptr++; 259 return UChar(the_char); 260 } 261 262 static void 263 push_back(char c) 264 /* push a character back onto the input stream */ 265 { 266 if (bufptr == bufstart) 267 _nc_syserr_abort("Can't backspace off beginning of line"); 268 *--bufptr = c; 269 _nc_curr_col--; 270 } 271 272 static long 273 stream_pos(void) 274 /* return our current character position in the input stream */ 275 { 276 return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0)); 277 } 278 279 static bool 280 end_of_stream(void) 281 /* are we at end of input? */ 282 { 283 return ((yyin ? feof(yyin) : (bufptr && *bufptr == '\0')) 284 ? TRUE : FALSE); 285 } 286 287 /* Assume we may be looking at a termcap-style continuation */ 288 static NCURSES_INLINE int 289 eat_escaped_newline(int ch) 290 { 291 if (ch == '\\') 292 while ((ch = next_char()) == '\n' || iswhite(ch)) 293 continue; 294 return ch; 295 } 296 297 #define TOK_BUF_SIZE MAX_ENTRY_SIZE 298 299 #define OkToAdd() \ 300 ((tok_ptr - tok_buf) < (TOK_BUF_SIZE - 2)) 301 302 #define AddCh(ch) \ 303 *tok_ptr++ = (char) ch; \ 304 *tok_ptr = '\0' 305 306 /* 307 * int 308 * get_token() 309 * 310 * Scans the input for the next token, storing the specifics in the 311 * global structure 'curr_token' and returning one of the following: 312 * 313 * NAMES A line beginning in column 1. 'name' 314 * will be set to point to everything up to but 315 * not including the first separator on the line. 316 * BOOLEAN An entry consisting of a name followed by 317 * a separator. 'name' will be set to point to 318 * the name of the capability. 319 * NUMBER An entry of the form 320 * name#digits, 321 * 'name' will be set to point to the capability 322 * name and 'valnumber' to the number given. 323 * STRING An entry of the form 324 * name=characters, 325 * 'name' is set to the capability name and 326 * 'valstring' to the string of characters, with 327 * input translations done. 328 * CANCEL An entry of the form 329 * name@, 330 * 'name' is set to the capability name and 331 * 'valnumber' to -1. 332 * EOF The end of the file has been reached. 333 * 334 * A `separator' is either a comma or a semicolon, depending on whether 335 * we are in termcap or terminfo mode. 336 * 337 */ 338 339 NCURSES_EXPORT(int) 340 _nc_get_token(bool silent) 341 { 342 static const char terminfo_punct[] = "@%&*!#"; 343 static char *tok_buf; 344 345 char *after_list; 346 char *after_name; 347 char *numchk; 348 char *tok_ptr; 349 char *s; 350 char numbuf[80]; 351 int ch; 352 int dot_flag = FALSE; 353 int type; 354 long number; 355 long token_start; 356 unsigned found; 357 #ifdef TRACE 358 int old_line; 359 int old_col; 360 #endif 361 362 if (pushtype != NO_PUSHBACK) { 363 int retval = pushtype; 364 365 _nc_set_type(pushname != 0 ? pushname : ""); 366 DEBUG(3, ("pushed-back token: `%s', class %d", 367 _nc_curr_token.tk_name, pushtype)); 368 369 pushtype = NO_PUSHBACK; 370 if (pushname != 0) 371 pushname[0] = '\0'; 372 373 /* currtok wasn't altered by _nc_push_token() */ 374 return (retval); 375 } 376 377 if (end_of_stream()) { 378 yyin = 0; 379 next_char(); /* frees its allocated memory */ 380 if (tok_buf != 0) { 381 if (_nc_curr_token.tk_name == tok_buf) 382 _nc_curr_token.tk_name = 0; 383 FreeAndNull(tok_buf); 384 } 385 return (EOF); 386 } 387 388 start_token: 389 token_start = stream_pos(); 390 while ((ch = next_char()) == '\n' || iswhite(ch)) { 391 if (ch == '\n') 392 had_newline = TRUE; 393 continue; 394 } 395 396 ch = eat_escaped_newline(ch); 397 398 #ifdef TRACE 399 old_line = _nc_curr_line; 400 old_col = _nc_curr_col; 401 #endif 402 if (ch == EOF) 403 type = EOF; 404 else { 405 /* if this is a termcap entry, skip a leading separator */ 406 if (separator == ':' && ch == ':') 407 ch = next_char(); 408 409 if (ch == '.' 410 #if NCURSES_EXT_FUNCS 411 && !_nc_disable_period 412 #endif 413 ) { 414 dot_flag = TRUE; 415 DEBUG(8, ("dot-flag set")); 416 417 while ((ch = next_char()) == '.' || iswhite(ch)) 418 continue; 419 } 420 421 if (ch == EOF) { 422 type = EOF; 423 goto end_of_token; 424 } 425 426 /* have to make some punctuation chars legal for terminfo */ 427 if (!isalnum(UChar(ch)) 428 #if NCURSES_EXT_FUNCS 429 && !(ch == '.' && _nc_disable_period) 430 #endif 431 && !strchr(terminfo_punct, (char) ch)) { 432 if (!silent) 433 _nc_warning("Illegal character (expected alphanumeric or %s) - '%s'", 434 terminfo_punct, unctrl((chtype) ch)); 435 _nc_panic_mode(separator); 436 goto start_token; 437 } 438 439 if (tok_buf == 0) 440 tok_buf = typeMalloc(char, TOK_BUF_SIZE); 441 442 #ifdef TRACE 443 old_line = _nc_curr_line; 444 old_col = _nc_curr_col; 445 #endif 446 tok_ptr = tok_buf; 447 AddCh(ch); 448 449 if (first_column) { 450 _nc_comment_start = token_start; 451 _nc_comment_end = _nc_curr_file_pos; 452 _nc_start_line = _nc_curr_line; 453 454 _nc_syntax = ERR; 455 after_name = 0; 456 after_list = 0; 457 while ((ch = next_char()) != '\n') { 458 if (ch == EOF) { 459 _nc_err_abort(MSG_NO_INPUTS); 460 } else if (ch == '|') { 461 after_list = tok_ptr; 462 if (after_name == 0) 463 after_name = tok_ptr; 464 } else if (ch == ':' && last_char() != ',') { 465 _nc_syntax = SYN_TERMCAP; 466 separator = ':'; 467 break; 468 } else if (ch == ',') { 469 _nc_syntax = SYN_TERMINFO; 470 separator = ','; 471 /* 472 * If we did not see a '|', then we found a name with no 473 * aliases or description. 474 */ 475 if (after_name == 0) 476 break; 477 /* 478 * If we see a comma, we assume this is terminfo unless we 479 * subsequently run into a colon. But we don't stop 480 * looking for a colon until hitting a newline. This 481 * allows commas to be embedded in description fields of 482 * either syntax. 483 */ 484 } else 485 ch = eat_escaped_newline(ch); 486 487 if (OkToAdd()) { 488 AddCh(ch); 489 } else { 490 ch = EOF; 491 break; 492 } 493 } 494 *tok_ptr = '\0'; 495 if (_nc_syntax == ERR) { 496 /* 497 * Grrr...what we ought to do here is barf, complaining that 498 * the entry is malformed. But because a couple of name fields 499 * in the 8.2 termcap file end with |\, we just have to assume 500 * it's termcap syntax. 501 */ 502 _nc_syntax = SYN_TERMCAP; 503 separator = ':'; 504 } else if (_nc_syntax == SYN_TERMINFO) { 505 /* throw away trailing /, *$/ */ 506 for (--tok_ptr; 507 iswhite(*tok_ptr) || *tok_ptr == ','; 508 tok_ptr--) 509 continue; 510 tok_ptr[1] = '\0'; 511 } 512 513 /* 514 * This is the soonest we have the terminal name fetched. Set up 515 * for following warning messages. If there's no '|', then there 516 * is no description. 517 */ 518 if (after_name != 0) { 519 ch = *after_name; 520 *after_name = '\0'; 521 _nc_set_type(tok_buf); 522 *after_name = (char) ch; 523 } 524 525 /* 526 * Compute the boundary between the aliases and the description 527 * field for syntax-checking purposes. 528 */ 529 if (after_list != 0) { 530 if (!silent) { 531 if (*after_list == '\0') 532 _nc_warning("empty longname field"); 533 else if (strchr(after_list, ' ') == 0) 534 _nc_warning("older tic versions may treat the description field as an alias"); 535 } 536 } else { 537 after_list = tok_buf + strlen(tok_buf); 538 DEBUG(1, ("missing description")); 539 } 540 541 /* 542 * Whitespace in a name field other than the long name can confuse 543 * rdist and some termcap tools. Slashes are a no-no. Other 544 * special characters can be dangerous due to shell expansion. 545 */ 546 for (s = tok_buf; s < after_list; ++s) { 547 if (isspace(UChar(*s))) { 548 if (!silent) 549 _nc_warning("whitespace in name or alias field"); 550 break; 551 } else if (*s == '/') { 552 if (!silent) 553 _nc_warning("slashes aren't allowed in names or aliases"); 554 break; 555 } else if (strchr("$[]!*?", *s)) { 556 if (!silent) 557 _nc_warning("dubious character `%c' in name or alias field", *s); 558 break; 559 } 560 } 561 562 _nc_curr_token.tk_name = tok_buf; 563 type = NAMES; 564 } else { 565 if (had_newline && _nc_syntax == SYN_TERMCAP) { 566 _nc_warning("Missing backslash before newline"); 567 had_newline = FALSE; 568 } 569 while ((ch = next_char()) != EOF) { 570 if (!isalnum(UChar(ch))) { 571 if (_nc_syntax == SYN_TERMINFO) { 572 if (ch != '_') 573 break; 574 } else { /* allow ';' for "k;" */ 575 if (ch != ';') 576 break; 577 } 578 } 579 if (OkToAdd()) { 580 AddCh(ch); 581 } else { 582 ch = EOF; 583 break; 584 } 585 } 586 587 *tok_ptr++ = '\0'; /* separate name/value in buffer */ 588 switch (ch) { 589 case ',': 590 case ':': 591 if (ch != separator) 592 _nc_err_abort("Separator inconsistent with syntax"); 593 _nc_curr_token.tk_name = tok_buf; 594 type = BOOLEAN; 595 break; 596 case '@': 597 if ((ch = next_char()) != separator && !silent) 598 _nc_warning("Missing separator after `%s', have %s", 599 tok_buf, unctrl((chtype) ch)); 600 _nc_curr_token.tk_name = tok_buf; 601 type = CANCEL; 602 break; 603 604 case '#': 605 found = 0; 606 while (isalnum(ch = next_char())) { 607 numbuf[found++] = (char) ch; 608 if (found >= sizeof(numbuf) - 1) 609 break; 610 } 611 numbuf[found] = '\0'; 612 number = strtol(numbuf, &numchk, 0); 613 if (!silent) { 614 if (numchk == numbuf) 615 _nc_warning("no value given for `%s'", tok_buf); 616 if ((*numchk != '\0') || (ch != separator)) 617 _nc_warning("Missing separator"); 618 } 619 _nc_curr_token.tk_name = tok_buf; 620 _nc_curr_token.tk_valnumber = number; 621 type = NUMBER; 622 break; 623 624 case '=': 625 ch = _nc_trans_string(tok_ptr, tok_buf + TOK_BUF_SIZE); 626 if (!silent && ch != separator) 627 _nc_warning("Missing separator"); 628 _nc_curr_token.tk_name = tok_buf; 629 _nc_curr_token.tk_valstring = tok_ptr; 630 type = STRING; 631 break; 632 633 case EOF: 634 type = EOF; 635 break; 636 default: 637 /* just to get rid of the compiler warning */ 638 type = UNDEF; 639 if (!silent) 640 _nc_warning("Illegal character - '%s'", unctrl((chtype) ch)); 641 } 642 } /* end else (first_column == FALSE) */ 643 } /* end else (ch != EOF) */ 644 645 end_of_token: 646 647 #ifdef TRACE 648 if (dot_flag == TRUE) 649 DEBUG(8, ("Commented out ")); 650 651 if (_nc_tracing >= DEBUG_LEVEL(8)) { 652 _tracef("parsed %d.%d to %d.%d", 653 old_line, old_col, 654 _nc_curr_line, _nc_curr_col); 655 } 656 if (_nc_tracing >= DEBUG_LEVEL(7)) { 657 switch (type) { 658 case BOOLEAN: 659 _tracef("Token: Boolean; name='%s'", 660 _nc_curr_token.tk_name); 661 break; 662 663 case NUMBER: 664 _tracef("Token: Number; name='%s', value=%d", 665 _nc_curr_token.tk_name, 666 _nc_curr_token.tk_valnumber); 667 break; 668 669 case STRING: 670 _tracef("Token: String; name='%s', value=%s", 671 _nc_curr_token.tk_name, 672 _nc_visbuf(_nc_curr_token.tk_valstring)); 673 break; 674 675 case CANCEL: 676 _tracef("Token: Cancel; name='%s'", 677 _nc_curr_token.tk_name); 678 break; 679 680 case NAMES: 681 682 _tracef("Token: Names; value='%s'", 683 _nc_curr_token.tk_name); 684 break; 685 686 case EOF: 687 _tracef("Token: End of file"); 688 break; 689 690 default: 691 _nc_warning("Bad token type"); 692 } 693 } 694 #endif 695 696 if (dot_flag == TRUE) /* if commented out, use the next one */ 697 type = _nc_get_token(silent); 698 699 DEBUG(3, ("token: `%s', class %d", 700 ((_nc_curr_token.tk_name != 0) 701 ? _nc_curr_token.tk_name 702 : "<null>"), 703 type)); 704 705 return (type); 706 } 707 708 /* 709 * char 710 * trans_string(ptr) 711 * 712 * Reads characters using next_char() until encountering a separator, nl, 713 * or end-of-file. The returned value is the character which caused 714 * reading to stop. The following translations are done on the input: 715 * 716 * ^X goes to ctrl-X (i.e. X & 037) 717 * {\E,\n,\r,\b,\t,\f} go to 718 * {ESCAPE,newline,carriage-return,backspace,tab,formfeed} 719 * {\^,\\} go to {carat,backslash} 720 * \ddd (for ddd = up to three octal digits) goes to the character ddd 721 * 722 * \e == \E 723 * \0 == \200 724 * 725 */ 726 727 NCURSES_EXPORT(int) 728 _nc_trans_string(char *ptr, char *last) 729 { 730 int count = 0; 731 int number = 0; 732 int i, c; 733 chtype ch, last_ch = '\0'; 734 bool ignored = FALSE; 735 bool long_warning = FALSE; 736 737 while ((ch = c = next_char()) != (chtype) separator && c != EOF) { 738 if (ptr >= (last - 1)) { 739 if (c != EOF) { 740 while ((c = next_char()) != separator && c != EOF) { 741 ; 742 } 743 ch = c; 744 } 745 break; 746 } 747 if ((_nc_syntax == SYN_TERMCAP) && c == '\n') 748 break; 749 if (ch == '^' && last_ch != '%') { 750 ch = c = next_char(); 751 if (c == EOF) 752 _nc_err_abort(MSG_NO_INPUTS); 753 754 if (!(is7bits(ch) && isprint(ch))) { 755 _nc_warning("Illegal ^ character - '%s'", unctrl(ch)); 756 } 757 if (ch == '?') { 758 *(ptr++) = '\177'; 759 if (_nc_tracing) 760 _nc_warning("Allow ^? as synonym for \\177"); 761 } else { 762 if ((ch &= 037) == 0) 763 ch = 128; 764 *(ptr++) = (char) (ch); 765 } 766 } else if (ch == '\\') { 767 ch = c = next_char(); 768 if (c == EOF) 769 _nc_err_abort(MSG_NO_INPUTS); 770 771 if (ch >= '0' && ch <= '7') { 772 number = ch - '0'; 773 for (i = 0; i < 2; i++) { 774 ch = c = next_char(); 775 if (c == EOF) 776 _nc_err_abort(MSG_NO_INPUTS); 777 778 if (c < '0' || c > '7') { 779 if (isdigit(c)) { 780 _nc_warning("Non-octal digit `%c' in \\ sequence", c); 781 /* allow the digit; it'll do less harm */ 782 } else { 783 push_back((char) c); 784 break; 785 } 786 } 787 788 number = number * 8 + c - '0'; 789 } 790 791 if (number == 0) 792 number = 0200; 793 *(ptr++) = (char) number; 794 } else { 795 switch (c) { 796 case 'E': 797 case 'e': 798 *(ptr++) = '\033'; 799 break; 800 801 case 'a': 802 *(ptr++) = '\007'; 803 break; 804 805 case 'l': 806 case 'n': 807 *(ptr++) = '\n'; 808 break; 809 810 case 'r': 811 *(ptr++) = '\r'; 812 break; 813 814 case 'b': 815 *(ptr++) = '\010'; 816 break; 817 818 case 's': 819 *(ptr++) = ' '; 820 break; 821 822 case 'f': 823 *(ptr++) = '\014'; 824 break; 825 826 case 't': 827 *(ptr++) = '\t'; 828 break; 829 830 case '\\': 831 *(ptr++) = '\\'; 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 '\n': 847 continue; 848 849 default: 850 _nc_warning("Illegal character '%s' in \\ sequence", 851 unctrl(ch)); 852 /* FALLTHRU */ 853 case '|': 854 *(ptr++) = (char) ch; 855 } /* endswitch (ch) */ 856 } /* endelse (ch < '0' || ch > '7') */ 857 } 858 /* end else if (ch == '\\') */ 859 else if (ch == '\n' && (_nc_syntax == SYN_TERMINFO)) { 860 /* 861 * Newlines embedded in a terminfo string are ignored, provided 862 * that the next line begins with whitespace. 863 */ 864 ignored = TRUE; 865 } else { 866 *(ptr++) = (char) ch; 867 } 868 869 if (!ignored) { 870 if (_nc_curr_col <= 1) { 871 push_back((char) ch); 872 ch = '\n'; 873 break; 874 } 875 last_ch = ch; 876 count++; 877 } 878 ignored = FALSE; 879 880 if (count > MAXCAPLEN && !long_warning) { 881 _nc_warning("Very long string found. Missing separator?"); 882 long_warning = TRUE; 883 } 884 } /* end while */ 885 886 *ptr = '\0'; 887 888 return (ch); 889 } 890 891 /* 892 * _nc_push_token() 893 * 894 * Push a token of given type so that it will be reread by the next 895 * get_token() call. 896 */ 897 898 NCURSES_EXPORT(void) 899 _nc_push_token(int tokclass) 900 { 901 /* 902 * This implementation is kind of bogus, it will fail if we ever do more 903 * than one pushback at a time between get_token() calls. It relies on the 904 * fact that _nc_curr_token is static storage that nothing but 905 * _nc_get_token() touches. 906 */ 907 pushtype = tokclass; 908 if (pushname == 0) 909 pushname = typeMalloc(char, MAX_NAME_SIZE + 1); 910 _nc_get_type(pushname); 911 912 DEBUG(3, ("pushing token: `%s', class %d", 913 ((_nc_curr_token.tk_name != 0) 914 ? _nc_curr_token.tk_name 915 : "<null>"), 916 pushtype)); 917 } 918 919 /* 920 * Panic mode error recovery - skip everything until a "ch" is found. 921 */ 922 NCURSES_EXPORT(void) 923 _nc_panic_mode(char ch) 924 { 925 int c; 926 927 for (;;) { 928 c = next_char(); 929 if (c == ch) 930 return; 931 if (c == EOF) 932 return; 933 } 934 } 935 936 #if NO_LEAKS 937 NCURSES_EXPORT(void) 938 _nc_comp_scan_leaks(void) 939 { 940 if (pushname != 0) { 941 FreeAndNull(pushname); 942 } 943 } 944 #endif 945