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[tomato.git] / release / src / router / glib / gscanner.c
blobbecead81799708d2baee5f634b7850e77258c441
1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * GScanner: Flexible lexical scanner for general purpose.
5 * Copyright (C) 1997, 1998 Tim Janik
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
21 */
22
23 /*
24 * Modified by the GLib Team and others 1997-1999. See the AUTHORS
25 * file for a list of people on the GLib Team. See the ChangeLog
26 * files for a list of changes. These files are distributed with
27 * GLib at ftp://ftp.gtk.org/pub/gtk/.
28 */
29
30 /*
31 * MT safe
32 */
33
34 #define __gscanner_c__
35
36 #ifdef HAVE_CONFIG_H
37 #include <config.h>
38 #endif
39
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <string.h>
43 #include <stdio.h>
44 #include "glib.h"
45 #ifdef HAVE_UNISTD_H
46 #include <unistd.h>
47 #endif
48 #include <errno.h>
49 #include <sys/types.h> /* needed for sys/stat.h */
50 #include <sys/stat.h>
51 #ifdef _MSC_VER
52 #include <io.h> /* For _read() */
53 #endif
54
55 /* --- defines --- */
56 #define to_lower(c) ( \
57 (guchar) ( \
58 ( (((guchar)(c))>='A' && ((guchar)(c))<='Z') * ('a'-'A') ) | \
59 ( (((guchar)(c))>=192 && ((guchar)(c))<=214) * (224-192) ) | \
60 ( (((guchar)(c))>=216 && ((guchar)(c))<=222) * (248-216) ) | \
61 ((guchar)(c)) \
62 ) \
63 )
64 #define READ_BUFFER_SIZE (4000)
65
66
67 /* --- typedefs --- */
68 typedef struct _GScannerKey GScannerKey;
69
70 struct _GScannerKey
71 {
72 guint scope_id;
73 gchar *symbol;
74 gpointer value;
75 };
76
77
78
79 /* --- variables --- */
80 static GScannerConfig g_scanner_config_template =
81 {
82 (
83 " \t\r\n"
84 ) /* cset_skip_characters */,
85 (
86 G_CSET_a_2_z
87 "_"
88 G_CSET_A_2_Z
89 ) /* cset_identifier_first */,
90 (
91 G_CSET_a_2_z
92 "_0123456789"
93 G_CSET_A_2_Z
94 G_CSET_LATINS
95 G_CSET_LATINC
96 ) /* cset_identifier_nth */,
97 ( "#\n" ) /* cpair_comment_single */,
98
99 FALSE /* case_sensitive */,
100
101 TRUE /* skip_comment_multi */,
102 TRUE /* skip_comment_single */,
103 TRUE /* scan_comment_multi */,
104 TRUE /* scan_identifier */,
105 FALSE /* scan_identifier_1char */,
106 FALSE /* scan_identifier_NULL */,
107 TRUE /* scan_symbols */,
108 FALSE /* scan_binary */,
109 TRUE /* scan_octal */,
110 TRUE /* scan_float */,
111 TRUE /* scan_hex */,
112 FALSE /* scan_hex_dollar */,
113 TRUE /* scan_string_sq */,
114 TRUE /* scan_string_dq */,
115 TRUE /* numbers_2_int */,
116 FALSE /* int_2_float */,
117 FALSE /* identifier_2_string */,
118 TRUE /* char_2_token */,
119 FALSE /* symbol_2_token */,
120 FALSE /* scope_0_fallback */,
121 };
122
123
124 /* --- prototypes --- */
125 static inline
126 GScannerKey* g_scanner_lookup_internal (GScanner *scanner,
127 guint scope_id,
128 const gchar *symbol);
129 static gint g_scanner_key_equal (gconstpointer v1,
130 gconstpointer v2);
131 static guint g_scanner_key_hash (gconstpointer v);
132 static void g_scanner_get_token_ll (GScanner *scanner,
133 GTokenType *token_p,
134 GTokenValue *value_p,
135 guint *line_p,
136 guint *position_p);
137 static void g_scanner_get_token_i (GScanner *scanner,
138 GTokenType *token_p,
139 GTokenValue *value_p,
140 guint *line_p,
141 guint *position_p);
142
143 static guchar g_scanner_peek_next_char (GScanner *scanner);
144 static guchar g_scanner_get_char (GScanner *scanner,
145 guint *line_p,
146 guint *position_p);
147 static void g_scanner_msg_handler (GScanner *scanner,
148 gchar *message,
149 gint is_error);
150
151
152 /* --- functions --- */
153 static inline gint
154 g_scanner_char_2_num (guchar c,
155 guchar base)
156 {
157 if (c >= '0' && c <= '9')
158 c -= '0';
159 else if (c >= 'A' && c <= 'Z')
160 c -= 'A' - 10;
161 else if (c >= 'a' && c <= 'z')
162 c -= 'a' - 10;
163 else
164 return -1;
165
166 if (c < base)
167 return c;
168
169 return -1;
170 }
171
172 GScanner*
173 g_scanner_new (GScannerConfig *config_templ)
174 {
175 GScanner *scanner;
176
177 if (!config_templ)
178 config_templ = &g_scanner_config_template;
179
180 scanner = g_new0 (GScanner, 1);
181
182 scanner->user_data = NULL;
183 scanner->max_parse_errors = 0;
184 scanner->parse_errors = 0;
185 scanner->input_name = NULL;
186 scanner->derived_data = NULL;
187
188 scanner->config = g_new0 (GScannerConfig, 1);
189
190 scanner->config->case_sensitive = config_templ->case_sensitive;
191 scanner->config->cset_skip_characters = config_templ->cset_skip_characters;
192 if (!scanner->config->cset_skip_characters)
193 scanner->config->cset_skip_characters = "";
194 scanner->config->cset_identifier_first= config_templ->cset_identifier_first;
195 scanner->config->cset_identifier_nth = config_templ->cset_identifier_nth;
196 scanner->config->cpair_comment_single = config_templ->cpair_comment_single;
197 scanner->config->skip_comment_multi = config_templ->skip_comment_multi;
198 scanner->config->skip_comment_single = config_templ->skip_comment_single;
199 scanner->config->scan_comment_multi = config_templ->scan_comment_multi;
200 scanner->config->scan_identifier = config_templ->scan_identifier;
201 scanner->config->scan_identifier_1char= config_templ->scan_identifier_1char;
202 scanner->config->scan_identifier_NULL = config_templ->scan_identifier_NULL;
203 scanner->config->scan_symbols = config_templ->scan_symbols;
204 scanner->config->scan_binary = config_templ->scan_binary;
205 scanner->config->scan_octal = config_templ->scan_octal;
206 scanner->config->scan_float = config_templ->scan_float;
207 scanner->config->scan_hex = config_templ->scan_hex;
208 scanner->config->scan_hex_dollar = config_templ->scan_hex_dollar;
209 scanner->config->scan_string_sq = config_templ->scan_string_sq;
210 scanner->config->scan_string_dq = config_templ->scan_string_dq;
211 scanner->config->numbers_2_int = config_templ->numbers_2_int;
212 scanner->config->int_2_float = config_templ->int_2_float;
213 scanner->config->identifier_2_string = config_templ->identifier_2_string;
214 scanner->config->char_2_token = config_templ->char_2_token;
215 scanner->config->symbol_2_token = config_templ->symbol_2_token;
216 scanner->config->scope_0_fallback = config_templ->scope_0_fallback;
217
218 scanner->token = G_TOKEN_NONE;
219 scanner->value.v_int = 0;
220 scanner->line = 1;
221 scanner->position = 0;
222
223 scanner->next_token = G_TOKEN_NONE;
224 scanner->next_value.v_int = 0;
225 scanner->next_line = 1;
226 scanner->next_position = 0;
227
228 scanner->symbol_table = g_hash_table_new (g_scanner_key_hash, g_scanner_key_equal);
229 scanner->input_fd = -1;
230 scanner->text = NULL;
231 scanner->text_end = NULL;
232 scanner->buffer = NULL;
233 scanner->scope_id = 0;
234
235 scanner->msg_handler = g_scanner_msg_handler;
236
237 return scanner;
238 }
239
240 static inline void
241 g_scanner_free_value (GTokenType *token_p,
242 GTokenValue *value_p)
243 {
244 switch (*token_p)
245 {
246 case G_TOKEN_STRING:
247 case G_TOKEN_IDENTIFIER:
248 case G_TOKEN_IDENTIFIER_NULL:
249 case G_TOKEN_COMMENT_SINGLE:
250 case G_TOKEN_COMMENT_MULTI:
251 g_free (value_p->v_string);
252 break;
253
254 default:
255 break;
256 }
257
258 *token_p = G_TOKEN_NONE;
259 }
260
261 static void
262 g_scanner_destroy_symbol_table_entry (gpointer _key,
263 gpointer _value,
264 gpointer _data)
265 {
266 GScannerKey *key = _key;
267
268 g_free (key->symbol);
269 g_free (key);
270 }
271
272 void
273 g_scanner_destroy (GScanner *scanner)
274 {
275 g_return_if_fail (scanner != NULL);
276
277 g_hash_table_foreach (scanner->symbol_table,
278 g_scanner_destroy_symbol_table_entry, NULL);
279 g_hash_table_destroy (scanner->symbol_table);
280 g_scanner_free_value (&scanner->token, &scanner->value);
281 g_scanner_free_value (&scanner->next_token, &scanner->next_value);
282 g_free (scanner->config);
283 g_free (scanner->buffer);
284 g_free (scanner);
285 }
286
287 static void
288 g_scanner_msg_handler (GScanner *scanner,
289 gchar *message,
290 gint is_error)
291 {
292 g_return_if_fail (scanner != NULL);
293
294 fprintf (stdout, "%s:%d: ", scanner->input_name, scanner->line);
295 if (is_error)
296 fprintf (stdout, "error: ");
297 fprintf (stdout, "%s\n", message);
298 }
299
300 void
301 g_scanner_error (GScanner *scanner,
302 const gchar *format,
303 ...)
304 {
305 g_return_if_fail (scanner != NULL);
306 g_return_if_fail (format != NULL);
307
308 scanner->parse_errors++;
309
310 if (scanner->msg_handler)
311 {
312 va_list args;
313 gchar *string;
314
315 va_start (args, format);
316 string = g_strdup_vprintf (format, args);
317 va_end (args);
318
319 scanner->msg_handler (scanner, string, TRUE);
320
321 g_free (string);
322 }
323 }
324
325 void
326 g_scanner_warn (GScanner *scanner,
327 const gchar *format,
328 ...)
329 {
330 g_return_if_fail (scanner != NULL);
331 g_return_if_fail (format != NULL);
332
333 if (scanner->msg_handler)
334 {
335 va_list args;
336 gchar *string;
337
338 va_start (args, format);
339 string = g_strdup_vprintf (format, args);
340 va_end (args);
341
342 scanner->msg_handler (scanner, string, FALSE);
343
344 g_free (string);
345 }
346 }
347
348 static gint
349 g_scanner_key_equal (gconstpointer v1,
350 gconstpointer v2)
351 {
352 const GScannerKey *key1 = v1;
353 const GScannerKey *key2 = v2;
354
355 return (key1->scope_id == key2->scope_id) && (strcmp (key1->symbol, key2->symbol) == 0);
356 }
357
358 static guint
359 g_scanner_key_hash (gconstpointer v)
360 {
361 const GScannerKey *key = v;
362 gchar *c;
363 guint h;
364
365 h = key->scope_id;
366 for (c = key->symbol; *c; c++)
367 {
368 guint g;
369
370 h = (h << 4) + *c;
371 g = h & 0xf0000000;
372 if (g)
373 {
374 h = h ^ (g >> 24);
375 h = h ^ g;
376 }
377 }
378
379 return h;
380 }
381
382 static inline GScannerKey*
383 g_scanner_lookup_internal (GScanner *scanner,
384 guint scope_id,
385 const gchar *symbol)
386 {
387 GScannerKey *key_p;
388 GScannerKey key;
389
390 key.scope_id = scope_id;
391
392 if (!scanner->config->case_sensitive)
393 {
394 gchar *d;
395 const gchar *c;
396
397 key.symbol = g_new (gchar, strlen (symbol) + 1);
398 for (d = key.symbol, c = symbol; *c; c++, d++)
399 *d = to_lower (*c);
400 *d = 0;
401 key_p = g_hash_table_lookup (scanner->symbol_table, &key);
402 g_free (key.symbol);
403 }
404 else
405 {
406 key.symbol = (gchar*) symbol;
407 key_p = g_hash_table_lookup (scanner->symbol_table, &key);
408 }
409
410 return key_p;
411 }
412
413 void
414 g_scanner_scope_add_symbol (GScanner *scanner,
415 guint scope_id,
416 const gchar *symbol,
417 gpointer value)
418 {
419 GScannerKey *key;
420
421 g_return_if_fail (scanner != NULL);
422 g_return_if_fail (symbol != NULL);
423
424 key = g_scanner_lookup_internal (scanner, scope_id, symbol);
425
426 if (!key)
427 {
428 key = g_new (GScannerKey, 1);
429 key->scope_id = scope_id;
430 key->symbol = g_strdup (symbol);
431 key->value = value;
432 if (!scanner->config->case_sensitive)
433 {
434 gchar *c;
435
436 c = key->symbol;
437 while (*c != 0)
438 {
439 *c = to_lower (*c);
440 c++;
441 }
442 }
443 g_hash_table_insert (scanner->symbol_table, key, key);
444 }
445 else
446 key->value = value;
447 }
448
449 void
450 g_scanner_scope_remove_symbol (GScanner *scanner,
451 guint scope_id,
452 const gchar *symbol)
453 {
454 GScannerKey *key;
455
456 g_return_if_fail (scanner != NULL);
457 g_return_if_fail (symbol != NULL);
458
459 key = g_scanner_lookup_internal (scanner, scope_id, symbol);
460
461 if (key)
462 {
463 g_hash_table_remove (scanner->symbol_table, key);
464 g_free (key->symbol);
465 g_free (key);
466 }
467 }
468
469 gpointer
470 g_scanner_lookup_symbol (GScanner *scanner,
471 const gchar *symbol)
472 {
473 GScannerKey *key;
474 guint scope_id;
475
476 g_return_val_if_fail (scanner != NULL, NULL);
477
478 if (!symbol)
479 return NULL;
480
481 scope_id = scanner->scope_id;
482 key = g_scanner_lookup_internal (scanner, scope_id, symbol);
483 if (!key && scope_id && scanner->config->scope_0_fallback)
484 key = g_scanner_lookup_internal (scanner, 0, symbol);
485
486 if (key)
487 return key->value;
488 else
489 return NULL;
490 }
491
492 gpointer
493 g_scanner_scope_lookup_symbol (GScanner *scanner,
494 guint scope_id,
495 const gchar *symbol)
496 {
497 GScannerKey *key;
498
499 g_return_val_if_fail (scanner != NULL, NULL);
500
501 if (!symbol)
502 return NULL;
503
504 key = g_scanner_lookup_internal (scanner, scope_id, symbol);
505
506 if (key)
507 return key->value;
508 else
509 return NULL;
510 }
511
512 guint
513 g_scanner_set_scope (GScanner *scanner,
514 guint scope_id)
515 {
516 guint old_scope_id;
517
518 g_return_val_if_fail (scanner != NULL, 0);
519
520 old_scope_id = scanner->scope_id;
521 scanner->scope_id = scope_id;
522
523 return old_scope_id;
524 }
525
526 static void
527 g_scanner_foreach_internal (gpointer _key,
528 gpointer _value,
529 gpointer _user_data)
530 {
531 GScannerKey *key;
532 gpointer *d;
533 GHFunc func;
534 gpointer user_data;
535 guint *scope_id;
536
537 d = _user_data;
538 func = (GHFunc) d[0];
539 user_data = d[1];
540 scope_id = d[2];
541 key = _value;
542
543 if (key->scope_id == *scope_id)
544 func (key->symbol, key->value, user_data);
545 }
546
547 void
548 g_scanner_scope_foreach_symbol (GScanner *scanner,
549 guint scope_id,
550 GHFunc func,
551 gpointer user_data)
552 {
553 gpointer d[3];
554
555 g_return_if_fail (scanner != NULL);
556
557 d[0] = (gpointer) func;
558 d[1] = user_data;
559 d[2] = &scope_id;
560
561 g_hash_table_foreach (scanner->symbol_table, g_scanner_foreach_internal, d);
562 }
563
564 void
565 g_scanner_freeze_symbol_table (GScanner *scanner)
566 {
567 g_return_if_fail (scanner != NULL);
568
569 g_hash_table_freeze (scanner->symbol_table);
570 }
571
572 void
573 g_scanner_thaw_symbol_table (GScanner *scanner)
574 {
575 g_return_if_fail (scanner != NULL);
576
577 g_hash_table_thaw (scanner->symbol_table);
578 }
579
580 GTokenType
581 g_scanner_peek_next_token (GScanner *scanner)
582 {
583 g_return_val_if_fail (scanner != NULL, G_TOKEN_EOF);
584
585 if (scanner->next_token == G_TOKEN_NONE)
586 {
587 scanner->next_line = scanner->line;
588 scanner->next_position = scanner->position;
589 g_scanner_get_token_i (scanner,
590 &scanner->next_token,
591 &scanner->next_value,
592 &scanner->next_line,
593 &scanner->next_position);
594 }
595
596 return scanner->next_token;
597 }
598
599 GTokenType
600 g_scanner_get_next_token (GScanner *scanner)
601 {
602 g_return_val_if_fail (scanner != NULL, G_TOKEN_EOF);
603
604 if (scanner->next_token != G_TOKEN_NONE)
605 {
606 g_scanner_free_value (&scanner->token, &scanner->value);
607
608 scanner->token = scanner->next_token;
609 scanner->value = scanner->next_value;
610 scanner->line = scanner->next_line;
611 scanner->position = scanner->next_position;
612 scanner->next_token = G_TOKEN_NONE;
613 }
614 else
615 g_scanner_get_token_i (scanner,
616 &scanner->token,
617 &scanner->value,
618 &scanner->line,
619 &scanner->position);
620
621 return scanner->token;
622 }
623
624 GTokenType
625 g_scanner_cur_token (GScanner *scanner)
626 {
627 g_return_val_if_fail (scanner != NULL, G_TOKEN_EOF);
628
629 return scanner->token;
630 }
631
632 GTokenValue
633 g_scanner_cur_value (GScanner *scanner)
634 {
635 GTokenValue v;
636
637 v.v_int = 0;
638
639 g_return_val_if_fail (scanner != NULL, v);
640
641 /* MSC isn't capable of handling return scanner->value; ? */
642
643 v = scanner->value;
644
645 return v;
646 }
647
648 guint
649 g_scanner_cur_line (GScanner *scanner)
650 {
651 g_return_val_if_fail (scanner != NULL, 0);
652
653 return scanner->line;
654 }
655
656 guint
657 g_scanner_cur_position (GScanner *scanner)
658 {
659 g_return_val_if_fail (scanner != NULL, 0);
660
661 return scanner->position;
662 }
663
664 gboolean
665 g_scanner_eof (GScanner *scanner)
666 {
667 g_return_val_if_fail (scanner != NULL, TRUE);
668
669 return scanner->token == G_TOKEN_EOF;
670 }
671
672 void
673 g_scanner_input_file (GScanner *scanner,
674 gint input_fd)
675 {
676 g_return_if_fail (scanner != NULL);
677 g_return_if_fail (input_fd >= 0);
678
679 if (scanner->input_fd >= 0)
680 g_scanner_sync_file_offset (scanner);
681
682 scanner->token = G_TOKEN_NONE;
683 scanner->value.v_int = 0;
684 scanner->line = 1;
685 scanner->position = 0;
686 scanner->next_token = G_TOKEN_NONE;
687
688 scanner->input_fd = input_fd;
689 scanner->text = NULL;
690 scanner->text_end = NULL;
691
692 if (!scanner->buffer)
693 scanner->buffer = g_new (gchar, READ_BUFFER_SIZE + 1);
694 }
695
696 void
697 g_scanner_input_text (GScanner *scanner,
698 const gchar *text,
699 guint text_len)
700 {
701 g_return_if_fail (scanner != NULL);
702 if (text_len)
703 g_return_if_fail (text != NULL);
704 else
705 text = NULL;
706
707 if (scanner->input_fd >= 0)
708 g_scanner_sync_file_offset (scanner);
709
710 scanner->token = G_TOKEN_NONE;
711 scanner->value.v_int = 0;
712 scanner->line = 1;
713 scanner->position = 0;
714 scanner->next_token = G_TOKEN_NONE;
715
716 scanner->input_fd = -1;
717 scanner->text = text;
718 scanner->text_end = text + text_len;
719
720 if (scanner->buffer)
721 {
722 g_free (scanner->buffer);
723 scanner->buffer = NULL;
724 }
725 }
726
727 static guchar
728 g_scanner_peek_next_char (GScanner *scanner)
729 {
730 if (scanner->text < scanner->text_end)
731 {
732 return *scanner->text;
733 }
734 else if (scanner->input_fd >= 0)
735 {
736 gint count;
737 gchar *buffer;
738
739 buffer = scanner->buffer;
740 do
741 {
742 count = read (scanner->input_fd, buffer, READ_BUFFER_SIZE);
743 }
744 while (count == -1 && (errno == EINTR || errno == EAGAIN));
745
746 if (count < 1)
747 {
748 scanner->input_fd = -1;
749
750 return 0;
751 }
752 else
753 {
754 scanner->text = buffer;
755 scanner->text_end = buffer + count;
756
757 return *buffer;
758 }
759 }
760 else
761 return 0;
762 }
763
764 void
765 g_scanner_sync_file_offset (GScanner *scanner)
766 {
767 g_return_if_fail (scanner != NULL);
768
769 /* for file input, rewind the filedescriptor to the current
770 * buffer position and blow the file read ahead buffer. usefull for
771 * third party uses of our filedescriptor, which hooks onto the current
772 * scanning position.
773 */
774
775 if (scanner->input_fd >= 0 && scanner->text_end > scanner->text)
776 {
777 gint buffered;
778
779 buffered = scanner->text_end - scanner->text;
780 if (lseek (scanner->input_fd, - buffered, SEEK_CUR) >= 0)
781 {
782 /* we succeeded, blow our buffer's contents now */
783 scanner->text = NULL;
784 scanner->text_end = NULL;
785 }
786 else
787 errno = 0;
788 }
789 }
790
791 static guchar
792 g_scanner_get_char (GScanner *scanner,
793 guint *line_p,
794 guint *position_p)
795 {
796 guchar fchar;
797
798 if (scanner->text < scanner->text_end)
799 fchar = *(scanner->text++);
800 else if (scanner->input_fd >= 0)
801 {
802 gint count;
803 gchar *buffer;
804
805 buffer = scanner->buffer;
806 do
807 {
808 count = read (scanner->input_fd, buffer, READ_BUFFER_SIZE);
809 }
810 while (count == -1 && (errno == EINTR || errno == EAGAIN));
811
812 if (count < 1)
813 {
814 scanner->input_fd = -1;
815 fchar = 0;
816 }
817 else
818 {
819 scanner->text = buffer + 1;
820 scanner->text_end = buffer + count;
821 fchar = *buffer;
822 if (!fchar)
823 {
824 g_scanner_sync_file_offset (scanner);
825 scanner->text_end = scanner->text;
826 scanner->input_fd = -1;
827 }
828 }
829 }
830 else
831 fchar = 0;
832
833 if (fchar == '\n')
834 {
835 (*position_p) = 0;
836 (*line_p)++;
837 }
838 else if (fchar)
839 {
840 (*position_p)++;
841 }
842
843 return fchar;
844 }
845
846 void
847 g_scanner_unexp_token (GScanner *scanner,
848 GTokenType expected_token,
849 const gchar *identifier_spec,
850 const gchar *symbol_spec,
851 const gchar *symbol_name,
852 const gchar *message,
853 gint is_error)
854 {
855 gchar *token_string;
856 guint token_string_len;
857 gchar *expected_string;
858 guint expected_string_len;
859 gchar *message_prefix;
860 gboolean print_unexp;
861 void (*msg_handler) (GScanner*, const gchar*, ...);
862
863 g_return_if_fail (scanner != NULL);
864
865 if (is_error)
866 msg_handler = g_scanner_error;
867 else
868 msg_handler = g_scanner_warn;
869
870 if (!identifier_spec)
871 identifier_spec = "identifier";
872 if (!symbol_spec)
873 symbol_spec = "symbol";
874
875 token_string_len = 56;
876 token_string = g_new (gchar, token_string_len + 1);
877 expected_string_len = 64;
878 expected_string = g_new (gchar, expected_string_len + 1);
879 print_unexp = TRUE;
880
881 switch (scanner->token)
882 {
883 case G_TOKEN_EOF:
884 g_snprintf (token_string, token_string_len, "end of file");
885 break;
886
887 default:
888 if (scanner->token >= 1 && scanner->token <= 255)
889 {
890 if ((scanner->token >= ' ' && scanner->token <= '~') ||
891 strchr (scanner->config->cset_identifier_first, scanner->token) ||
892 strchr (scanner->config->cset_identifier_nth, scanner->token))
893 g_snprintf (token_string, expected_string_len, "character `%c'", scanner->token);
894 else
895 g_snprintf (token_string, expected_string_len, "character `\\%o'", scanner->token);
896 break;
897 }
898 else if (!scanner->config->symbol_2_token)
899 {
900 g_snprintf (token_string, token_string_len, "(unknown) token <%d>", scanner->token);
901 break;
902 }
903 /* fall through */
904 case G_TOKEN_SYMBOL:
905 if (expected_token == G_TOKEN_SYMBOL ||
906 (scanner->config->symbol_2_token &&
907 expected_token > G_TOKEN_LAST))
908 print_unexp = FALSE;
909 if (symbol_name)
910 g_snprintf (token_string,
911 token_string_len,
912 "%s%s `%s'",
913 print_unexp ? "" : "invalid ",
914 symbol_spec,
915 symbol_name);
916 else
917 g_snprintf (token_string,
918 token_string_len,
919 "%s%s",
920 print_unexp ? "" : "invalid ",
921 symbol_spec);
922 break;
923
924 case G_TOKEN_ERROR:
925 print_unexp = FALSE;
926 expected_token = G_TOKEN_NONE;
927 switch (scanner->value.v_error)
928 {
929 case G_ERR_UNEXP_EOF:
930 g_snprintf (token_string, token_string_len, "scanner: unexpected end of file");
931 break;
932
933 case G_ERR_UNEXP_EOF_IN_STRING:
934 g_snprintf (token_string, token_string_len, "scanner: unterminated string constant");
935 break;
936
937 case G_ERR_UNEXP_EOF_IN_COMMENT:
938 g_snprintf (token_string, token_string_len, "scanner: unterminated comment");
939 break;
940
941 case G_ERR_NON_DIGIT_IN_CONST:
942 g_snprintf (token_string, token_string_len, "scanner: non digit in constant");
943 break;
944
945 case G_ERR_FLOAT_RADIX:
946 g_snprintf (token_string, token_string_len, "scanner: invalid radix for floating constant");
947 break;
948
949 case G_ERR_FLOAT_MALFORMED:
950 g_snprintf (token_string, token_string_len, "scanner: malformed floating constant");
951 break;
952
953 case G_ERR_DIGIT_RADIX:
954 g_snprintf (token_string, token_string_len, "scanner: digit is beyond radix");
955 break;
956
957 case G_ERR_UNKNOWN:
958 default:
959 g_snprintf (token_string, token_string_len, "scanner: unknown error");
960 break;
961 }
962 break;
963
964 case G_TOKEN_CHAR:
965 g_snprintf (token_string, token_string_len, "character `%c'", scanner->value.v_char);
966 break;
967
968 case G_TOKEN_IDENTIFIER:
969 case G_TOKEN_IDENTIFIER_NULL:
970 if (expected_token == G_TOKEN_IDENTIFIER ||
971 expected_token == G_TOKEN_IDENTIFIER_NULL)
972 print_unexp = FALSE;
973 g_snprintf (token_string,
974 token_string_len,
975 "%s%s `%s'",
976 print_unexp ? "" : "invalid ",
977 identifier_spec,
978 scanner->token == G_TOKEN_IDENTIFIER ? scanner->value.v_string : "null");
979 break;
980
981 case G_TOKEN_BINARY:
982 case G_TOKEN_OCTAL:
983 case G_TOKEN_INT:
984 case G_TOKEN_HEX:
985 g_snprintf (token_string, token_string_len, "number `%ld'", scanner->value.v_int);
986 break;
987
988 case G_TOKEN_FLOAT:
989 g_snprintf (token_string, token_string_len, "number `%.3f'", scanner->value.v_float);
990 break;
991
992 case G_TOKEN_STRING:
993 if (expected_token == G_TOKEN_STRING)
994 print_unexp = FALSE;
995 g_snprintf (token_string,
996 token_string_len,
997 "%s%sstring constant \"%s\"",
998 print_unexp ? "" : "invalid ",
999 scanner->value.v_string[0] == 0 ? "empty " : "",
1000 scanner->value.v_string);
1001 token_string[token_string_len - 2] = '"';
1002 token_string[token_string_len - 1] = 0;
1003 break;
1004
1005 case G_TOKEN_COMMENT_SINGLE:
1006 case G_TOKEN_COMMENT_MULTI:
1007 g_snprintf (token_string, token_string_len, "comment");
1008 break;
1009
1010 case G_TOKEN_NONE:
1011 /* somehow the user's parsing code is screwed, there isn't much
1012 * we can do about it.
1013 * Note, a common case to trigger this is
1014 * g_scanner_peek_next_token(); g_scanner_unexp_token();
1015 * without an intermediate g_scanner_get_next_token().
1016 */
1017 g_assert_not_reached ();
1018 break;
1019 }
1020
1021
1022 switch (expected_token)
1023 {
1024 gboolean need_valid;
1025
1026 default:
1027 if (expected_token >= 1 && expected_token <= 255)
1028 {
1029 if ((expected_token >= ' ' && expected_token <= '~') ||
1030 strchr (scanner->config->cset_identifier_first, expected_token) ||
1031 strchr (scanner->config->cset_identifier_nth, expected_token))
1032 g_snprintf (expected_string, expected_string_len, "character `%c'", expected_token);
1033 else
1034 g_snprintf (expected_string, expected_string_len, "character `\\%o'", expected_token);
1035 break;
1036 }
1037 else if (!scanner->config->symbol_2_token)
1038 {
1039 g_snprintf (expected_string, expected_string_len, "(unknown) token <%d>", expected_token);
1040 break;
1041 }
1042 /* fall through */
1043 case G_TOKEN_SYMBOL:
1044 need_valid = (scanner->token == G_TOKEN_SYMBOL ||
1045 (scanner->config->symbol_2_token &&
1046 scanner->token > G_TOKEN_LAST));
1047 g_snprintf (expected_string,
1048 expected_string_len,
1049 "%s%s",
1050 need_valid ? "valid " : "",
1051 symbol_spec);
1052 /* FIXME: should we attempt to lookup the symbol_name for symbol_2_token? */
1053 break;
1054
1055 case G_TOKEN_INT:
1056 g_snprintf (expected_string, expected_string_len, "number (integer)");
1057 break;
1058
1059 case G_TOKEN_FLOAT:
1060 g_snprintf (expected_string, expected_string_len, "number (float)");
1061 break;
1062
1063 case G_TOKEN_STRING:
1064 g_snprintf (expected_string,
1065 expected_string_len,
1066 "%sstring constant",
1067 scanner->token == G_TOKEN_STRING ? "valid " : "");
1068 break;
1069
1070 case G_TOKEN_IDENTIFIER:
1071 case G_TOKEN_IDENTIFIER_NULL:
1072 g_snprintf (expected_string,
1073 expected_string_len,
1074 "%s%s",
1075 (scanner->token == G_TOKEN_IDENTIFIER_NULL ||
1076 scanner->token == G_TOKEN_IDENTIFIER ? "valid " : ""),
1077 identifier_spec);
1078 break;
1079
1080 case G_TOKEN_EOF:
1081 g_snprintf (expected_string, expected_string_len, "end of file");
1082 break;
1083
1084 case G_TOKEN_NONE:
1085 break;
1086 }
1087
1088 if (message && message[0] != 0)
1089 message_prefix = " - ";
1090 else
1091 {
1092 message_prefix = "";
1093 message = "";
1094 }
1095
1096 if (expected_token != G_TOKEN_NONE)
1097 {
1098 if (print_unexp)
1099 msg_handler (scanner,
1100 "unexpected %s, expected %s%s%s",
1101 token_string,
1102 expected_string,
1103 message_prefix,
1104 message);
1105 else
1106 msg_handler (scanner,
1107 "%s, expected %s%s%s",
1108 token_string,
1109 expected_string,
1110 message_prefix,
1111 message);
1112 }
1113 else
1114 {
1115 if (print_unexp)
1116 msg_handler (scanner,
1117 "unexpected %s%s%s",
1118 token_string,
1119 message_prefix,
1120 message);
1121 else
1122 msg_handler (scanner,
1123 "%s%s%s",
1124 token_string,
1125 message_prefix,
1126 message);
1127 }
1128
1129 g_free (token_string);
1130 g_free (expected_string);
1131 }
1132
1133 gint
1134 g_scanner_stat_mode (const gchar *filename)
1135 {
1136 struct stat *stat_buf;
1137 gint st_mode;
1138
1139 stat_buf = g_new0 (struct stat, 1);
1140 #ifdef HAVE_LSTAT
1141 lstat (filename, stat_buf);
1142 #else
1143 stat (filename, stat_buf);
1144 #endif
1145 st_mode = stat_buf->st_mode;
1146
1147 g_free (stat_buf);
1148
1149 return st_mode;
1150 }
1151
1152 static void
1153 g_scanner_get_token_i (GScanner *scanner,
1154 GTokenType *token_p,
1155 GTokenValue *value_p,
1156 guint *line_p,
1157 guint *position_p)
1158 {
1159 do
1160 {
1161 g_scanner_free_value (token_p, value_p);
1162 g_scanner_get_token_ll (scanner, token_p, value_p, line_p, position_p);
1163 }
1164 while (((*token_p > 0 && *token_p < 256) &&
1165 strchr (scanner->config->cset_skip_characters, *token_p)) ||
1166 (*token_p == G_TOKEN_CHAR &&
1167 strchr (scanner->config->cset_skip_characters, value_p->v_char)) ||
1168 (*token_p == G_TOKEN_COMMENT_MULTI &&
1169 scanner->config->skip_comment_multi) ||
1170 (*token_p == G_TOKEN_COMMENT_SINGLE &&
1171 scanner->config->skip_comment_single));
1172
1173 switch (*token_p)
1174 {
1175 case G_TOKEN_IDENTIFIER:
1176 if (scanner->config->identifier_2_string)
1177 *token_p = G_TOKEN_STRING;
1178 break;
1179
1180 case G_TOKEN_SYMBOL:
1181 if (scanner->config->symbol_2_token)
1182 *token_p = (GTokenType) value_p->v_symbol;
1183 break;
1184
1185 case G_TOKEN_BINARY:
1186 case G_TOKEN_OCTAL:
1187 case G_TOKEN_HEX:
1188 if (scanner->config->numbers_2_int)
1189 *token_p = G_TOKEN_INT;
1190 break;
1191
1192 default:
1193 break;
1194 }
1195
1196 if (*token_p == G_TOKEN_INT &&
1197 scanner->config->int_2_float)
1198 {
1199 *token_p = G_TOKEN_FLOAT;
1200 value_p->v_float = value_p->v_int;
1201 }
1202
1203 errno = 0;
1204 }
1205
1206 static void
1207 g_scanner_get_token_ll (GScanner *scanner,
1208 GTokenType *token_p,
1209 GTokenValue *value_p,
1210 guint *line_p,
1211 guint *position_p)
1212 {
1213 GScannerConfig *config;
1214 GTokenType token;
1215 gboolean in_comment_multi;
1216 gboolean in_comment_single;
1217 gboolean in_string_sq;
1218 gboolean in_string_dq;
1219 GString *gstring;
1220 GTokenValue value;
1221 guchar ch;
1222
1223 config = scanner->config;
1224 (*value_p).v_int = 0;
1225
1226 if ((scanner->text >= scanner->text_end && scanner->input_fd < 0) ||
1227 scanner->token == G_TOKEN_EOF)
1228 {
1229 *token_p = G_TOKEN_EOF;
1230 return;
1231 }
1232
1233 in_comment_multi = FALSE;
1234 in_comment_single = FALSE;
1235 in_string_sq = FALSE;
1236 in_string_dq = FALSE;
1237 gstring = NULL;
1238
1239 do /* while (ch != 0) */
1240 {
1241 gboolean dotted_float = FALSE;
1242
1243 ch = g_scanner_get_char (scanner, line_p, position_p);
1244
1245 value.v_int = 0;
1246 token = G_TOKEN_NONE;
1247
1248 /* this is *evil*, but needed ;(
1249 * we first check for identifier first character, because it
1250 * might interfere with other key chars like slashes or numbers
1251 */
1252 if (config->scan_identifier &&
1253 ch && strchr (config->cset_identifier_first, ch))
1254 goto identifier_precedence;
1255
1256 switch (ch)
1257 {
1258 case 0:
1259 token = G_TOKEN_EOF;
1260 (*position_p)++;
1261 /* ch = 0; */
1262 break;
1263
1264 case '/':
1265 if (!config->scan_comment_multi ||
1266 g_scanner_peek_next_char (scanner) != '*')
1267 goto default_case;
1268 g_scanner_get_char (scanner, line_p, position_p);
1269 token = G_TOKEN_COMMENT_MULTI;
1270 in_comment_multi = TRUE;
1271 gstring = g_string_new ("");
1272 while ((ch = g_scanner_get_char (scanner, line_p, position_p)) != 0)
1273 {
1274 if (ch == '*' && g_scanner_peek_next_char (scanner) == '/')
1275 {
1276 g_scanner_get_char (scanner, line_p, position_p);
1277 in_comment_multi = FALSE;
1278 break;
1279 }
1280 else
1281 gstring = g_string_append_c (gstring, ch);
1282 }
1283 ch = 0;
1284 break;
1285
1286 case '\'':
1287 if (!config->scan_string_sq)
1288 goto default_case;
1289 token = G_TOKEN_STRING;
1290 in_string_sq = TRUE;
1291 gstring = g_string_new ("");
1292 while ((ch = g_scanner_get_char (scanner, line_p, position_p)) != 0)
1293 {
1294 if (ch == '\'')
1295 {
1296 in_string_sq = FALSE;
1297 break;
1298 }
1299 else
1300 gstring = g_string_append_c (gstring, ch);
1301 }
1302 ch = 0;
1303 break;
1304
1305 case '"':
1306 if (!config->scan_string_dq)
1307 goto default_case;
1308 token = G_TOKEN_STRING;
1309 in_string_dq = TRUE;
1310 gstring = g_string_new ("");
1311 while ((ch = g_scanner_get_char (scanner, line_p, position_p)) != 0)
1312 {
1313 if (ch == '"')
1314 {
1315 in_string_dq = FALSE;
1316 break;
1317 }
1318 else
1319 {
1320 if (ch == '\\')
1321 {
1322 ch = g_scanner_get_char (scanner, line_p, position_p);
1323 switch (ch)
1324 {
1325 guint i;
1326 guint fchar;
1327
1328 case 0:
1329 break;
1330
1331 case '\\':
1332 gstring = g_string_append_c (gstring, '\\');
1333 break;
1334
1335 case 'n':
1336 gstring = g_string_append_c (gstring, '\n');
1337 break;
1338
1339 case 't':
1340 gstring = g_string_append_c (gstring, '\t');
1341 break;
1342
1343 case 'r':
1344 gstring = g_string_append_c (gstring, '\r');
1345 break;
1346
1347 case 'b':
1348 gstring = g_string_append_c (gstring, '\b');
1349 break;
1350
1351 case 'f':
1352 gstring = g_string_append_c (gstring, '\f');
1353 break;
1354
1355 case '0':
1356 case '1':
1357 case '2':
1358 case '3':
1359 case '4':
1360 case '5':
1361 case '6':
1362 case '7':
1363 i = ch - '0';
1364 fchar = g_scanner_peek_next_char (scanner);
1365 if (fchar >= '0' && fchar <= '7')
1366 {
1367 ch = g_scanner_get_char (scanner, line_p, position_p);
1368 i = i * 8 + ch - '0';
1369 fchar = g_scanner_peek_next_char (scanner);
1370 if (fchar >= '0' && fchar <= '7')
1371 {
1372 ch = g_scanner_get_char (scanner, line_p, position_p);
1373 i = i * 8 + ch - '0';
1374 }
1375 }
1376 gstring = g_string_append_c (gstring, i);
1377 break;
1378
1379 default:
1380 gstring = g_string_append_c (gstring, ch);
1381 break;
1382 }
1383 }
1384 else
1385 gstring = g_string_append_c (gstring, ch);
1386 }
1387 }
1388 ch = 0;
1389 break;
1390
1391 case '.':
1392 if (!config->scan_float)
1393 goto default_case;
1394 token = G_TOKEN_FLOAT;
1395 dotted_float = TRUE;
1396 ch = g_scanner_get_char (scanner, line_p, position_p);
1397 goto number_parsing;
1398
1399 case '$':
1400 if (!config->scan_hex_dollar)
1401 goto default_case;
1402 token = G_TOKEN_HEX;
1403 ch = g_scanner_get_char (scanner, line_p, position_p);
1404 goto number_parsing;
1405
1406 case '0':
1407 if (config->scan_octal)
1408 token = G_TOKEN_OCTAL;
1409 else
1410 token = G_TOKEN_INT;
1411 ch = g_scanner_peek_next_char (scanner);
1412 if (config->scan_hex && (ch == 'x' || ch == 'X'))
1413 {
1414 token = G_TOKEN_HEX;
1415 g_scanner_get_char (scanner, line_p, position_p);
1416 ch = g_scanner_get_char (scanner, line_p, position_p);
1417 if (ch == 0)
1418 {
1419 token = G_TOKEN_ERROR;
1420 value.v_error = G_ERR_UNEXP_EOF;
1421 (*position_p)++;
1422 break;
1423 }
1424 if (g_scanner_char_2_num (ch, 16) < 0)
1425 {
1426 token = G_TOKEN_ERROR;
1427 value.v_error = G_ERR_DIGIT_RADIX;
1428 ch = 0;
1429 break;
1430 }
1431 }
1432 else if (config->scan_binary && (ch == 'b' || ch == 'B'))
1433 {
1434 token = G_TOKEN_BINARY;
1435 g_scanner_get_char (scanner, line_p, position_p);
1436 ch = g_scanner_get_char (scanner, line_p, position_p);
1437 if (ch == 0)
1438 {
1439 token = G_TOKEN_ERROR;
1440 value.v_error = G_ERR_UNEXP_EOF;
1441 (*position_p)++;
1442 break;
1443 }
1444 if (g_scanner_char_2_num (ch, 10) < 0)
1445 {
1446 token = G_TOKEN_ERROR;
1447 value.v_error = G_ERR_NON_DIGIT_IN_CONST;
1448 ch = 0;
1449 break;
1450 }
1451 }
1452 else
1453 ch = '0';
1454 /* fall through */
1455 case '1':
1456 case '2':
1457 case '3':
1458 case '4':
1459 case '5':
1460 case '6':
1461 case '7':
1462 case '8':
1463 case '9':
1464 number_parsing:
1465 {
1466 gboolean in_number = TRUE;
1467 gchar *endptr;
1468
1469 if (token == G_TOKEN_NONE)
1470 token = G_TOKEN_INT;
1471
1472 gstring = g_string_new (dotted_float ? "0." : "");
1473 gstring = g_string_append_c (gstring, ch);
1474
1475 do /* while (in_number) */
1476 {
1477 gboolean is_E;
1478
1479 is_E = token == G_TOKEN_FLOAT && (ch == 'e' || ch == 'E');
1480
1481 ch = g_scanner_peek_next_char (scanner);
1482
1483 if (g_scanner_char_2_num (ch, 36) >= 0 ||
1484 (config->scan_float && ch == '.') ||
1485 (is_E && (ch == '+' || ch == '-')))
1486 {
1487 ch = g_scanner_get_char (scanner, line_p, position_p);
1488
1489 switch (ch)
1490 {
1491 case '.':
1492 if (token != G_TOKEN_INT && token != G_TOKEN_OCTAL)
1493 {
1494 value.v_error = token == G_TOKEN_FLOAT ? G_ERR_FLOAT_MALFORMED : G_ERR_FLOAT_RADIX;
1495 token = G_TOKEN_ERROR;
1496 in_number = FALSE;
1497 }
1498 else
1499 {
1500 token = G_TOKEN_FLOAT;
1501 gstring = g_string_append_c (gstring, ch);
1502 }
1503 break;
1504
1505 case '0':
1506 case '1':
1507 case '2':
1508 case '3':
1509 case '4':
1510 case '5':
1511 case '6':
1512 case '7':
1513 case '8':
1514 case '9':
1515 gstring = g_string_append_c (gstring, ch);
1516 break;
1517
1518 case '-':
1519 case '+':
1520 if (token != G_TOKEN_FLOAT)
1521 {
1522 token = G_TOKEN_ERROR;
1523 value.v_error = G_ERR_NON_DIGIT_IN_CONST;
1524 in_number = FALSE;
1525 }
1526 else
1527 gstring = g_string_append_c (gstring, ch);
1528 break;
1529
1530 case 'e':
1531 case 'E':
1532 if ((token != G_TOKEN_HEX && !config->scan_float) ||
1533 (token != G_TOKEN_HEX &&
1534 token != G_TOKEN_OCTAL &&
1535 token != G_TOKEN_FLOAT &&
1536 token != G_TOKEN_INT))
1537 {
1538 token = G_TOKEN_ERROR;
1539 value.v_error = G_ERR_NON_DIGIT_IN_CONST;
1540 in_number = FALSE;
1541 }
1542 else
1543 {
1544 if (token != G_TOKEN_HEX)
1545 token = G_TOKEN_FLOAT;
1546 gstring = g_string_append_c (gstring, ch);
1547 }
1548 break;
1549
1550 default:
1551 if (token != G_TOKEN_HEX)
1552 {
1553 token = G_TOKEN_ERROR;
1554 value.v_error = G_ERR_NON_DIGIT_IN_CONST;
1555 in_number = FALSE;
1556 }
1557 else
1558 gstring = g_string_append_c (gstring, ch);
1559 break;
1560 }
1561 }
1562 else
1563 in_number = FALSE;
1564 }
1565 while (in_number);
1566
1567 endptr = NULL;
1568 switch (token)
1569 {
1570 case G_TOKEN_BINARY:
1571 value.v_binary = strtol (gstring->str, &endptr, 2);
1572 break;
1573
1574 case G_TOKEN_OCTAL:
1575 value.v_octal = strtol (gstring->str, &endptr, 8);
1576 break;
1577
1578 case G_TOKEN_INT:
1579 value.v_int = strtol (gstring->str, &endptr, 10);
1580 break;
1581
1582 case G_TOKEN_FLOAT:
1583 value.v_float = g_strtod (gstring->str, &endptr);
1584 break;
1585
1586 case G_TOKEN_HEX:
1587 value.v_hex = strtol (gstring->str, &endptr, 16);
1588 break;
1589
1590 default:
1591 break;
1592 }
1593 if (endptr && *endptr)
1594 {
1595 token = G_TOKEN_ERROR;
1596 if (*endptr == 'e' || *endptr == 'E')
1597 value.v_error = G_ERR_NON_DIGIT_IN_CONST;
1598 else
1599 value.v_error = G_ERR_DIGIT_RADIX;
1600 }
1601 g_string_free (gstring, TRUE);
1602 gstring = NULL;
1603 ch = 0;
1604 } /* number_parsing:... */
1605 break;
1606
1607 default:
1608 default_case:
1609 {
1610 if (config->cpair_comment_single &&
1611 ch == config->cpair_comment_single[0])
1612 {
1613 token = G_TOKEN_COMMENT_SINGLE;
1614 in_comment_single = TRUE;
1615 gstring = g_string_new ("");
1616 ch = g_scanner_get_char (scanner, line_p, position_p);
1617 while (ch != 0)
1618 {
1619 if (ch == config->cpair_comment_single[1])
1620 {
1621 in_comment_single = FALSE;
1622 ch = 0;
1623 break;
1624 }
1625
1626 gstring = g_string_append_c (gstring, ch);
1627 ch = g_scanner_get_char (scanner, line_p, position_p);
1628 }
1629 }
1630 else if (config->scan_identifier && ch &&
1631 strchr (config->cset_identifier_first, ch))
1632 {
1633 identifier_precedence:
1634
1635 if (config->cset_identifier_nth && ch &&
1636 strchr (config->cset_identifier_nth,
1637 g_scanner_peek_next_char (scanner)))
1638 {
1639 token = G_TOKEN_IDENTIFIER;
1640 gstring = g_string_new ("");
1641 gstring = g_string_append_c (gstring, ch);
1642 do
1643 {
1644 ch = g_scanner_get_char (scanner, line_p, position_p);
1645 gstring = g_string_append_c (gstring, ch);
1646 ch = g_scanner_peek_next_char (scanner);
1647 }
1648 while (ch && strchr (config->cset_identifier_nth, ch));
1649 ch = 0;
1650 }
1651 else if (config->scan_identifier_1char)
1652 {
1653 token = G_TOKEN_IDENTIFIER;
1654 value.v_identifier = g_new0 (gchar, 2);
1655 value.v_identifier[0] = ch;
1656 ch = 0;
1657 }
1658 }
1659 if (ch)
1660 {
1661 if (config->char_2_token)
1662 token = ch;
1663 else
1664 {
1665 token = G_TOKEN_CHAR;
1666 value.v_char = ch;
1667 }
1668 ch = 0;
1669 }
1670 } /* default_case:... */
1671 break;
1672 }
1673 g_assert (ch == 0 && token != G_TOKEN_NONE); /* paranoid */
1674 }
1675 while (ch != 0);
1676
1677 if (in_comment_multi || in_comment_single ||
1678 in_string_sq || in_string_dq)
1679 {
1680 token = G_TOKEN_ERROR;
1681 if (gstring)
1682 {
1683 g_string_free (gstring, TRUE);
1684 gstring = NULL;
1685 }
1686 (*position_p)++;
1687 if (in_comment_multi || in_comment_single)
1688 value.v_error = G_ERR_UNEXP_EOF_IN_COMMENT;
1689 else /* (in_string_sq || in_string_dq) */
1690 value.v_error = G_ERR_UNEXP_EOF_IN_STRING;
1691 }
1692
1693 if (gstring)
1694 {
1695 value.v_string = gstring->str;
1696 g_string_free (gstring, FALSE);
1697 gstring = NULL;
1698 }
1699
1700 if (token == G_TOKEN_IDENTIFIER)
1701 {
1702 if (config->scan_symbols)
1703 {
1704 GScannerKey *key;
1705 guint scope_id;
1706
1707 scope_id = scanner->scope_id;
1708 key = g_scanner_lookup_internal (scanner, scope_id, value.v_identifier);
1709 if (!key && scope_id && scanner->config->scope_0_fallback)
1710 key = g_scanner_lookup_internal (scanner, 0, value.v_identifier);
1711
1712 if (key)
1713 {
1714 g_free (value.v_identifier);
1715 token = G_TOKEN_SYMBOL;
1716 value.v_symbol = key->value;
1717 }
1718 }
1719
1720 if (token == G_TOKEN_IDENTIFIER &&
1721 config->scan_identifier_NULL &&
1722 strlen (value.v_identifier) == 4)
1723 {
1724 gchar *null_upper = "NULL";
1725 gchar *null_lower = "null";
1726
1727 if (scanner->config->case_sensitive)
1728 {
1729 if (value.v_identifier[0] == null_upper[0] &&
1730 value.v_identifier[1] == null_upper[1] &&
1731 value.v_identifier[2] == null_upper[2] &&
1732 value.v_identifier[3] == null_upper[3])
1733 token = G_TOKEN_IDENTIFIER_NULL;
1734 }
1735 else
1736 {
1737 if ((value.v_identifier[0] == null_upper[0] ||
1738 value.v_identifier[0] == null_lower[0]) &&
1739 (value.v_identifier[1] == null_upper[1] ||
1740 value.v_identifier[1] == null_lower[1]) &&
1741 (value.v_identifier[2] == null_upper[2] ||
1742 value.v_identifier[2] == null_lower[2]) &&
1743 (value.v_identifier[3] == null_upper[3] ||
1744 value.v_identifier[3] == null_lower[3]))
1745 token = G_TOKEN_IDENTIFIER_NULL;
1746 }
1747 }
1748 }
1749
1750 *token_p = token;
1751 *value_p = value;
1752 }
Tomato firmware and modifications.