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
54 MODULE_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
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)
_nc_reset_input(FILE * fp,char * buf)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
last_char(void)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
next_char(void)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 }
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
261 static void
push_back(char c)262 push_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
271 static long
stream_pos(void)272 stream_pos(void)
273 /* return our current character position in the input stream */
274 {
275 return (yyin ? ftell(yyin) : (bufptr ? bufptr - bufstart : 0));
276 }
277
278 static bool
end_of_stream(void)279 end_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 */
287 static inline int
eat_escaped_newline(int ch)288 eat_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
329 NCURSES_EXPORT(int)
_nc_get_token(bool silent)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
705 NCURSES_EXPORT(int)
_nc_trans_string(char * ptr,char * last)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
869 NCURSES_EXPORT(void)
_nc_push_token(int tokclass)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 */
893 NCURSES_EXPORT(void)
_nc_panic_mode(char ch)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
908 NCURSES_EXPORT(void)
_nc_comp_scan_leaks(void)909 _nc_comp_scan_leaks(void)
910 {
911 FreeAndNull(pushname);
912 }
913 #endif
914