]>
Commit | Line | Data |
---|---|---|
1 | ||
2 | /* | |
3 | * The parser implements the following grammar: | |
4 | * | |
5 | * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END | |
6 | * implicit_document ::= block_node DOCUMENT-END* | |
7 | * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* | |
8 | * block_node_or_indentless_sequence ::= | |
9 | * ALIAS | |
10 | * | properties (block_content | indentless_block_sequence)? | |
11 | * | block_content | |
12 | * | indentless_block_sequence | |
13 | * block_node ::= ALIAS | |
14 | * | properties block_content? | |
15 | * | block_content | |
16 | * flow_node ::= ALIAS | |
17 | * | properties flow_content? | |
18 | * | flow_content | |
19 | * properties ::= TAG ANCHOR? | ANCHOR TAG? | |
20 | * block_content ::= block_collection | flow_collection | SCALAR | |
21 | * flow_content ::= flow_collection | SCALAR | |
22 | * block_collection ::= block_sequence | block_mapping | |
23 | * flow_collection ::= flow_sequence | flow_mapping | |
24 | * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END | |
25 | * indentless_sequence ::= (BLOCK-ENTRY block_node?)+ | |
26 | * block_mapping ::= BLOCK-MAPPING_START | |
27 | * ((KEY block_node_or_indentless_sequence?)? | |
28 | * (VALUE block_node_or_indentless_sequence?)?)* | |
29 | * BLOCK-END | |
30 | * flow_sequence ::= FLOW-SEQUENCE-START | |
31 | * (flow_sequence_entry FLOW-ENTRY)* | |
32 | * flow_sequence_entry? | |
33 | * FLOW-SEQUENCE-END | |
34 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
35 | * flow_mapping ::= FLOW-MAPPING-START | |
36 | * (flow_mapping_entry FLOW-ENTRY)* | |
37 | * flow_mapping_entry? | |
38 | * FLOW-MAPPING-END | |
39 | * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
40 | */ | |
41 | ||
42 | #include "yaml_private.h" | |
43 | ||
44 | /* | |
45 | * Peek the next token in the token queue. | |
46 | */ | |
47 | ||
48 | #define PEEK_TOKEN(parser) \ | |
49 | ((parser->token_available || yaml_parser_fetch_more_tokens(parser)) ? \ | |
50 | parser->tokens.head : NULL) | |
51 | ||
52 | /* | |
53 | * Remove the next token from the queue (must be called after PEEK_TOKEN). | |
54 | */ | |
55 | ||
56 | #define SKIP_TOKEN(parser) \ | |
57 | (parser->token_available = 0, \ | |
58 | parser->tokens_parsed ++, \ | |
59 | parser->stream_end_produced = \ | |
60 | (parser->tokens.head->type == YAML_STREAM_END_TOKEN), \ | |
61 | parser->tokens.head ++) | |
62 | ||
63 | /* | |
64 | * Public API declarations. | |
65 | */ | |
66 | ||
67 | YAML_DECLARE(int) | |
68 | yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event); | |
69 | ||
70 | /* | |
71 | * Error handling. | |
72 | */ | |
73 | ||
74 | static int | |
75 | yaml_parser_set_parser_error(yaml_parser_t *parser, | |
76 | const char *problem, yaml_mark_t problem_mark); | |
77 | ||
78 | static int | |
79 | yaml_parser_set_parser_error_context(yaml_parser_t *parser, | |
80 | const char *context, yaml_mark_t context_mark, | |
81 | const char *problem, yaml_mark_t problem_mark); | |
82 | ||
83 | /* | |
84 | * State functions. | |
85 | */ | |
86 | ||
87 | static int | |
88 | yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event); | |
89 | ||
90 | static int | |
91 | yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event); | |
92 | ||
93 | static int | |
94 | yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, | |
95 | int implicit); | |
96 | ||
97 | static int | |
98 | yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event); | |
99 | ||
100 | static int | |
101 | yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event); | |
102 | ||
103 | static int | |
104 | yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, | |
105 | int block, int indentless_sequence); | |
106 | ||
107 | static int | |
108 | yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, | |
109 | yaml_event_t *event, int first); | |
110 | ||
111 | static int | |
112 | yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, | |
113 | yaml_event_t *event); | |
114 | ||
115 | static int | |
116 | yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, | |
117 | yaml_event_t *event, int first); | |
118 | ||
119 | static int | |
120 | yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, | |
121 | yaml_event_t *event); | |
122 | ||
123 | static int | |
124 | yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, | |
125 | yaml_event_t *event, int first); | |
126 | ||
127 | static int | |
128 | yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, | |
129 | yaml_event_t *event); | |
130 | ||
131 | static int | |
132 | yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, | |
133 | yaml_event_t *event); | |
134 | ||
135 | static int | |
136 | yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, | |
137 | yaml_event_t *event); | |
138 | ||
139 | static int | |
140 | yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, | |
141 | yaml_event_t *event, int first); | |
142 | ||
143 | static int | |
144 | yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, | |
145 | yaml_event_t *event, int empty); | |
146 | ||
147 | /* | |
148 | * Utility functions. | |
149 | */ | |
150 | ||
151 | static int | |
152 | yaml_parser_process_empty_scalar(yaml_parser_t *parser, | |
153 | yaml_event_t *event, yaml_mark_t mark); | |
154 | ||
155 | static int | |
156 | yaml_parser_process_directives(yaml_parser_t *parser, | |
157 | yaml_version_directive_t **version_directive_ref, | |
158 | yaml_tag_directive_t **tag_directives_start_ref, | |
159 | yaml_tag_directive_t **tag_directives_end_ref); | |
160 | ||
161 | static int | |
162 | yaml_parser_append_tag_directive(yaml_parser_t *parser, | |
163 | yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark); | |
164 | ||
165 | /* | |
166 | * Get the next event. | |
167 | */ | |
168 | ||
169 | YAML_DECLARE(int) | |
170 | yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event) | |
171 | { | |
172 | assert(parser); /* Non-NULL parser object is expected. */ | |
173 | assert(event); /* Non-NULL event object is expected. */ | |
174 | ||
175 | /* Erase the event object. */ | |
176 | ||
177 | memset(event, 0, sizeof(yaml_event_t)); | |
178 | ||
179 | /* No events after the end of the stream or error. */ | |
180 | ||
181 | if (parser->stream_end_produced || parser->error || | |
182 | parser->state == YAML_PARSE_END_STATE) { | |
183 | return 1; | |
184 | } | |
185 | ||
186 | /* Generate the next event. */ | |
187 | ||
188 | return yaml_parser_state_machine(parser, event); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Set parser error. | |
193 | */ | |
194 | ||
195 | static int | |
196 | yaml_parser_set_parser_error(yaml_parser_t *parser, | |
197 | const char *problem, yaml_mark_t problem_mark) | |
198 | { | |
199 | parser->error = YAML_PARSER_ERROR; | |
200 | parser->problem = problem; | |
201 | parser->problem_mark = problem_mark; | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int | |
207 | yaml_parser_set_parser_error_context(yaml_parser_t *parser, | |
208 | const char *context, yaml_mark_t context_mark, | |
209 | const char *problem, yaml_mark_t problem_mark) | |
210 | { | |
211 | parser->error = YAML_PARSER_ERROR; | |
212 | parser->context = context; | |
213 | parser->context_mark = context_mark; | |
214 | parser->problem = problem; | |
215 | parser->problem_mark = problem_mark; | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | ||
221 | /* | |
222 | * State dispatcher. | |
223 | */ | |
224 | ||
225 | static int | |
226 | yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event) | |
227 | { | |
228 | switch (parser->state) | |
229 | { | |
230 | case YAML_PARSE_STREAM_START_STATE: | |
231 | return yaml_parser_parse_stream_start(parser, event); | |
232 | ||
233 | case YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE: | |
234 | return yaml_parser_parse_document_start(parser, event, 1); | |
235 | ||
236 | case YAML_PARSE_DOCUMENT_START_STATE: | |
237 | return yaml_parser_parse_document_start(parser, event, 0); | |
238 | ||
239 | case YAML_PARSE_DOCUMENT_CONTENT_STATE: | |
240 | return yaml_parser_parse_document_content(parser, event); | |
241 | ||
242 | case YAML_PARSE_DOCUMENT_END_STATE: | |
243 | return yaml_parser_parse_document_end(parser, event); | |
244 | ||
245 | case YAML_PARSE_BLOCK_NODE_STATE: | |
246 | return yaml_parser_parse_node(parser, event, 1, 0); | |
247 | ||
248 | case YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE: | |
249 | return yaml_parser_parse_node(parser, event, 1, 1); | |
250 | ||
251 | case YAML_PARSE_FLOW_NODE_STATE: | |
252 | return yaml_parser_parse_node(parser, event, 0, 0); | |
253 | ||
254 | case YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE: | |
255 | return yaml_parser_parse_block_sequence_entry(parser, event, 1); | |
256 | ||
257 | case YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE: | |
258 | return yaml_parser_parse_block_sequence_entry(parser, event, 0); | |
259 | ||
260 | case YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE: | |
261 | return yaml_parser_parse_indentless_sequence_entry(parser, event); | |
262 | ||
263 | case YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE: | |
264 | return yaml_parser_parse_block_mapping_key(parser, event, 1); | |
265 | ||
266 | case YAML_PARSE_BLOCK_MAPPING_KEY_STATE: | |
267 | return yaml_parser_parse_block_mapping_key(parser, event, 0); | |
268 | ||
269 | case YAML_PARSE_BLOCK_MAPPING_VALUE_STATE: | |
270 | return yaml_parser_parse_block_mapping_value(parser, event); | |
271 | ||
272 | case YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE: | |
273 | return yaml_parser_parse_flow_sequence_entry(parser, event, 1); | |
274 | ||
275 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE: | |
276 | return yaml_parser_parse_flow_sequence_entry(parser, event, 0); | |
277 | ||
278 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE: | |
279 | return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event); | |
280 | ||
281 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE: | |
282 | return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event); | |
283 | ||
284 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE: | |
285 | return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event); | |
286 | ||
287 | case YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE: | |
288 | return yaml_parser_parse_flow_mapping_key(parser, event, 1); | |
289 | ||
290 | case YAML_PARSE_FLOW_MAPPING_KEY_STATE: | |
291 | return yaml_parser_parse_flow_mapping_key(parser, event, 0); | |
292 | ||
293 | case YAML_PARSE_FLOW_MAPPING_VALUE_STATE: | |
294 | return yaml_parser_parse_flow_mapping_value(parser, event, 0); | |
295 | ||
296 | case YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE: | |
297 | return yaml_parser_parse_flow_mapping_value(parser, event, 1); | |
298 | ||
299 | default: | |
300 | assert(1); /* Invalid state. */ | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Parse the production: | |
308 | * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END | |
309 | * ************ | |
310 | */ | |
311 | ||
312 | static int | |
313 | yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event) | |
314 | { | |
315 | yaml_token_t *token; | |
316 | ||
317 | token = PEEK_TOKEN(parser); | |
318 | if (!token) return 0; | |
319 | ||
320 | if (token->type != YAML_STREAM_START_TOKEN) { | |
321 | return yaml_parser_set_parser_error(parser, | |
322 | "did not find expected <stream-start>", token->start_mark); | |
323 | } | |
324 | ||
325 | parser->state = YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE; | |
326 | STREAM_START_EVENT_INIT(*event, token->data.stream_start.encoding, | |
327 | token->start_mark, token->start_mark); | |
328 | SKIP_TOKEN(parser); | |
329 | ||
330 | return 1; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Parse the productions: | |
335 | * implicit_document ::= block_node DOCUMENT-END* | |
336 | * * | |
337 | * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* | |
338 | * ************************* | |
339 | */ | |
340 | ||
341 | static int | |
342 | yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, | |
343 | int implicit) | |
344 | { | |
345 | yaml_token_t *token; | |
346 | yaml_version_directive_t *version_directive = NULL; | |
347 | struct { | |
348 | yaml_tag_directive_t *start; | |
349 | yaml_tag_directive_t *end; | |
350 | } tag_directives = { NULL, NULL }; | |
351 | ||
352 | token = PEEK_TOKEN(parser); | |
353 | if (!token) return 0; | |
354 | ||
355 | /* Parse extra document end indicators. */ | |
356 | ||
357 | if (!implicit) | |
358 | { | |
359 | while (token->type == YAML_DOCUMENT_END_TOKEN) { | |
360 | SKIP_TOKEN(parser); | |
361 | token = PEEK_TOKEN(parser); | |
362 | if (!token) return 0; | |
363 | } | |
364 | } | |
365 | ||
366 | /* Parse an implicit document. */ | |
367 | ||
368 | if (implicit && token->type != YAML_VERSION_DIRECTIVE_TOKEN && | |
369 | token->type != YAML_TAG_DIRECTIVE_TOKEN && | |
370 | token->type != YAML_DOCUMENT_START_TOKEN && | |
371 | token->type != YAML_STREAM_END_TOKEN) | |
372 | { | |
373 | if (!yaml_parser_process_directives(parser, NULL, NULL, NULL)) | |
374 | return 0; | |
375 | if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE)) | |
376 | return 0; | |
377 | parser->state = YAML_PARSE_BLOCK_NODE_STATE; | |
378 | DOCUMENT_START_EVENT_INIT(*event, NULL, NULL, NULL, 1, | |
379 | token->start_mark, token->start_mark); | |
380 | return 1; | |
381 | } | |
382 | ||
383 | /* Parse an explicit document. */ | |
384 | ||
385 | else if (token->type != YAML_STREAM_END_TOKEN) | |
386 | { | |
387 | yaml_mark_t start_mark, end_mark; | |
388 | start_mark = token->start_mark; | |
389 | if (!yaml_parser_process_directives(parser, &version_directive, | |
390 | &tag_directives.start, &tag_directives.end)) | |
391 | return 0; | |
392 | token = PEEK_TOKEN(parser); | |
393 | if (!token) goto error; | |
394 | if (token->type != YAML_DOCUMENT_START_TOKEN) { | |
395 | yaml_parser_set_parser_error(parser, | |
396 | "did not find expected <document start>", token->start_mark); | |
397 | goto error; | |
398 | } | |
399 | if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE)) | |
400 | goto error; | |
401 | parser->state = YAML_PARSE_DOCUMENT_CONTENT_STATE; | |
402 | end_mark = token->end_mark; | |
403 | DOCUMENT_START_EVENT_INIT(*event, version_directive, | |
404 | tag_directives.start, tag_directives.end, 0, | |
405 | start_mark, end_mark); | |
406 | SKIP_TOKEN(parser); | |
407 | version_directive = NULL; | |
408 | tag_directives.start = tag_directives.end = NULL; | |
409 | return 1; | |
410 | } | |
411 | ||
412 | /* Parse the stream end. */ | |
413 | ||
414 | else | |
415 | { | |
416 | parser->state = YAML_PARSE_END_STATE; | |
417 | STREAM_END_EVENT_INIT(*event, token->start_mark, token->end_mark); | |
418 | SKIP_TOKEN(parser); | |
419 | return 1; | |
420 | } | |
421 | ||
422 | error: | |
423 | yaml_free(version_directive); | |
424 | while (tag_directives.start != tag_directives.end) { | |
425 | yaml_free(tag_directives.end[-1].handle); | |
426 | yaml_free(tag_directives.end[-1].prefix); | |
427 | tag_directives.end --; | |
428 | } | |
429 | yaml_free(tag_directives.start); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Parse the productions: | |
435 | * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* | |
436 | * *********** | |
437 | */ | |
438 | ||
439 | static int | |
440 | yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event) | |
441 | { | |
442 | yaml_token_t *token; | |
443 | ||
444 | token = PEEK_TOKEN(parser); | |
445 | if (!token) return 0; | |
446 | ||
447 | if (token->type == YAML_VERSION_DIRECTIVE_TOKEN || | |
448 | token->type == YAML_TAG_DIRECTIVE_TOKEN || | |
449 | token->type == YAML_DOCUMENT_START_TOKEN || | |
450 | token->type == YAML_DOCUMENT_END_TOKEN || | |
451 | token->type == YAML_STREAM_END_TOKEN) { | |
452 | parser->state = POP(parser, parser->states); | |
453 | return yaml_parser_process_empty_scalar(parser, event, | |
454 | token->start_mark); | |
455 | } | |
456 | else { | |
457 | return yaml_parser_parse_node(parser, event, 1, 0); | |
458 | } | |
459 | } | |
460 | ||
461 | /* | |
462 | * Parse the productions: | |
463 | * implicit_document ::= block_node DOCUMENT-END* | |
464 | * ************* | |
465 | * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* | |
466 | * ************* | |
467 | */ | |
468 | ||
469 | static int | |
470 | yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event) | |
471 | { | |
472 | yaml_token_t *token; | |
473 | yaml_mark_t start_mark, end_mark; | |
474 | int implicit = 1; | |
475 | ||
476 | token = PEEK_TOKEN(parser); | |
477 | if (!token) return 0; | |
478 | ||
479 | start_mark = end_mark = token->start_mark; | |
480 | ||
481 | if (token->type == YAML_DOCUMENT_END_TOKEN) { | |
482 | end_mark = token->end_mark; | |
483 | SKIP_TOKEN(parser); | |
484 | implicit = 0; | |
485 | } | |
486 | ||
487 | while (!STACK_EMPTY(parser, parser->tag_directives)) { | |
488 | yaml_tag_directive_t tag_directive = POP(parser, parser->tag_directives); | |
489 | yaml_free(tag_directive.handle); | |
490 | yaml_free(tag_directive.prefix); | |
491 | } | |
492 | ||
493 | parser->state = YAML_PARSE_DOCUMENT_START_STATE; | |
494 | DOCUMENT_END_EVENT_INIT(*event, implicit, start_mark, end_mark); | |
495 | ||
496 | return 1; | |
497 | } | |
498 | ||
499 | /* | |
500 | * Parse the productions: | |
501 | * block_node_or_indentless_sequence ::= | |
502 | * ALIAS | |
503 | * ***** | |
504 | * | properties (block_content | indentless_block_sequence)? | |
505 | * ********** * | |
506 | * | block_content | indentless_block_sequence | |
507 | * * | |
508 | * block_node ::= ALIAS | |
509 | * ***** | |
510 | * | properties block_content? | |
511 | * ********** * | |
512 | * | block_content | |
513 | * * | |
514 | * flow_node ::= ALIAS | |
515 | * ***** | |
516 | * | properties flow_content? | |
517 | * ********** * | |
518 | * | flow_content | |
519 | * * | |
520 | * properties ::= TAG ANCHOR? | ANCHOR TAG? | |
521 | * ************************* | |
522 | * block_content ::= block_collection | flow_collection | SCALAR | |
523 | * ****** | |
524 | * flow_content ::= flow_collection | SCALAR | |
525 | * ****** | |
526 | */ | |
527 | ||
528 | static int | |
529 | yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, | |
530 | int block, int indentless_sequence) | |
531 | { | |
532 | yaml_token_t *token; | |
533 | yaml_char_t *anchor = NULL; | |
534 | yaml_char_t *tag_handle = NULL; | |
535 | yaml_char_t *tag_suffix = NULL; | |
536 | yaml_char_t *tag = NULL; | |
537 | yaml_mark_t start_mark, end_mark, tag_mark; | |
538 | int implicit; | |
539 | ||
540 | token = PEEK_TOKEN(parser); | |
541 | if (!token) return 0; | |
542 | ||
543 | if (token->type == YAML_ALIAS_TOKEN) | |
544 | { | |
545 | parser->state = POP(parser, parser->states); | |
546 | ALIAS_EVENT_INIT(*event, token->data.alias.value, | |
547 | token->start_mark, token->end_mark); | |
548 | SKIP_TOKEN(parser); | |
549 | return 1; | |
550 | } | |
551 | ||
552 | else | |
553 | { | |
554 | start_mark = end_mark = token->start_mark; | |
555 | ||
556 | if (token->type == YAML_ANCHOR_TOKEN) | |
557 | { | |
558 | anchor = token->data.anchor.value; | |
559 | start_mark = token->start_mark; | |
560 | end_mark = token->end_mark; | |
561 | SKIP_TOKEN(parser); | |
562 | token = PEEK_TOKEN(parser); | |
563 | if (!token) goto error; | |
564 | if (token->type == YAML_TAG_TOKEN) | |
565 | { | |
566 | tag_handle = token->data.tag.handle; | |
567 | tag_suffix = token->data.tag.suffix; | |
568 | tag_mark = token->start_mark; | |
569 | end_mark = token->end_mark; | |
570 | SKIP_TOKEN(parser); | |
571 | token = PEEK_TOKEN(parser); | |
572 | if (!token) goto error; | |
573 | } | |
574 | } | |
575 | else if (token->type == YAML_TAG_TOKEN) | |
576 | { | |
577 | tag_handle = token->data.tag.handle; | |
578 | tag_suffix = token->data.tag.suffix; | |
579 | start_mark = tag_mark = token->start_mark; | |
580 | end_mark = token->end_mark; | |
581 | SKIP_TOKEN(parser); | |
582 | token = PEEK_TOKEN(parser); | |
583 | if (!token) goto error; | |
584 | if (token->type == YAML_ANCHOR_TOKEN) | |
585 | { | |
586 | anchor = token->data.anchor.value; | |
587 | end_mark = token->end_mark; | |
588 | SKIP_TOKEN(parser); | |
589 | token = PEEK_TOKEN(parser); | |
590 | if (!token) goto error; | |
591 | } | |
592 | } | |
593 | ||
594 | if (tag_handle) { | |
595 | if (!*tag_handle) { | |
596 | tag = tag_suffix; | |
597 | yaml_free(tag_handle); | |
598 | tag_handle = tag_suffix = NULL; | |
599 | } | |
600 | else { | |
601 | yaml_tag_directive_t *tag_directive; | |
602 | for (tag_directive = parser->tag_directives.start; | |
603 | tag_directive != parser->tag_directives.top; | |
604 | tag_directive ++) { | |
605 | if (strcmp((char *)tag_directive->handle, (char *)tag_handle) == 0) { | |
606 | size_t prefix_len = strlen((char *)tag_directive->prefix); | |
607 | size_t suffix_len = strlen((char *)tag_suffix); | |
608 | tag = YAML_MALLOC(prefix_len+suffix_len+1); | |
609 | if (!tag) { | |
610 | parser->error = YAML_MEMORY_ERROR; | |
611 | goto error; | |
612 | } | |
613 | memcpy(tag, tag_directive->prefix, prefix_len); | |
614 | memcpy(tag+prefix_len, tag_suffix, suffix_len); | |
615 | tag[prefix_len+suffix_len] = '\0'; | |
616 | yaml_free(tag_handle); | |
617 | yaml_free(tag_suffix); | |
618 | tag_handle = tag_suffix = NULL; | |
619 | break; | |
620 | } | |
621 | } | |
622 | if (!tag) { | |
623 | yaml_parser_set_parser_error_context(parser, | |
624 | "while parsing a node", start_mark, | |
625 | "found undefined tag handle", tag_mark); | |
626 | goto error; | |
627 | } | |
628 | } | |
629 | } | |
630 | ||
631 | implicit = (!tag || !*tag); | |
632 | if (indentless_sequence && token->type == YAML_BLOCK_ENTRY_TOKEN) { | |
633 | end_mark = token->end_mark; | |
634 | parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE; | |
635 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, | |
636 | YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); | |
637 | return 1; | |
638 | } | |
639 | else { | |
640 | if (token->type == YAML_SCALAR_TOKEN) { | |
641 | int plain_implicit = 0; | |
642 | int quoted_implicit = 0; | |
643 | end_mark = token->end_mark; | |
644 | if ((token->data.scalar.style == YAML_PLAIN_SCALAR_STYLE && !tag) | |
645 | || (tag && strcmp((char *)tag, "!") == 0)) { | |
646 | plain_implicit = 1; | |
647 | } | |
648 | else if (!tag) { | |
649 | quoted_implicit = 1; | |
650 | } | |
651 | parser->state = POP(parser, parser->states); | |
652 | SCALAR_EVENT_INIT(*event, anchor, tag, | |
653 | token->data.scalar.value, token->data.scalar.length, | |
654 | plain_implicit, quoted_implicit, | |
655 | token->data.scalar.style, start_mark, end_mark); | |
656 | SKIP_TOKEN(parser); | |
657 | return 1; | |
658 | } | |
659 | else if (token->type == YAML_FLOW_SEQUENCE_START_TOKEN) { | |
660 | end_mark = token->end_mark; | |
661 | parser->state = YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE; | |
662 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, | |
663 | YAML_FLOW_SEQUENCE_STYLE, start_mark, end_mark); | |
664 | return 1; | |
665 | } | |
666 | else if (token->type == YAML_FLOW_MAPPING_START_TOKEN) { | |
667 | end_mark = token->end_mark; | |
668 | parser->state = YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE; | |
669 | MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, | |
670 | YAML_FLOW_MAPPING_STYLE, start_mark, end_mark); | |
671 | return 1; | |
672 | } | |
673 | else if (block && token->type == YAML_BLOCK_SEQUENCE_START_TOKEN) { | |
674 | end_mark = token->end_mark; | |
675 | parser->state = YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE; | |
676 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, | |
677 | YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); | |
678 | return 1; | |
679 | } | |
680 | else if (block && token->type == YAML_BLOCK_MAPPING_START_TOKEN) { | |
681 | end_mark = token->end_mark; | |
682 | parser->state = YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE; | |
683 | MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, | |
684 | YAML_BLOCK_MAPPING_STYLE, start_mark, end_mark); | |
685 | return 1; | |
686 | } | |
687 | else if (anchor || tag) { | |
688 | yaml_char_t *value = YAML_MALLOC(1); | |
689 | if (!value) { | |
690 | parser->error = YAML_MEMORY_ERROR; | |
691 | goto error; | |
692 | } | |
693 | value[0] = '\0'; | |
694 | parser->state = POP(parser, parser->states); | |
695 | SCALAR_EVENT_INIT(*event, anchor, tag, value, 0, | |
696 | implicit, 0, YAML_PLAIN_SCALAR_STYLE, | |
697 | start_mark, end_mark); | |
698 | return 1; | |
699 | } | |
700 | else { | |
701 | yaml_parser_set_parser_error_context(parser, | |
702 | (block ? "while parsing a block node" | |
703 | : "while parsing a flow node"), start_mark, | |
704 | "did not find expected node content", token->start_mark); | |
705 | goto error; | |
706 | } | |
707 | } | |
708 | } | |
709 | ||
710 | error: | |
711 | yaml_free(anchor); | |
712 | yaml_free(tag_handle); | |
713 | yaml_free(tag_suffix); | |
714 | yaml_free(tag); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Parse the productions: | |
721 | * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END | |
722 | * ******************** *********** * ********* | |
723 | */ | |
724 | ||
725 | static int | |
726 | yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, | |
727 | yaml_event_t *event, int first) | |
728 | { | |
729 | yaml_token_t *token; | |
730 | ||
731 | if (first) { | |
732 | token = PEEK_TOKEN(parser); | |
733 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
734 | return 0; | |
735 | SKIP_TOKEN(parser); | |
736 | } | |
737 | ||
738 | token = PEEK_TOKEN(parser); | |
739 | if (!token) return 0; | |
740 | ||
741 | if (token->type == YAML_BLOCK_ENTRY_TOKEN) | |
742 | { | |
743 | yaml_mark_t mark = token->end_mark; | |
744 | SKIP_TOKEN(parser); | |
745 | token = PEEK_TOKEN(parser); | |
746 | if (!token) return 0; | |
747 | if (token->type != YAML_BLOCK_ENTRY_TOKEN && | |
748 | token->type != YAML_BLOCK_END_TOKEN) { | |
749 | if (!PUSH(parser, parser->states, | |
750 | YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE)) | |
751 | return 0; | |
752 | return yaml_parser_parse_node(parser, event, 1, 0); | |
753 | } | |
754 | else { | |
755 | parser->state = YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE; | |
756 | return yaml_parser_process_empty_scalar(parser, event, mark); | |
757 | } | |
758 | } | |
759 | ||
760 | else if (token->type == YAML_BLOCK_END_TOKEN) | |
761 | { | |
762 | parser->state = POP(parser, parser->states); | |
763 | (void)POP(parser, parser->marks); | |
764 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); | |
765 | SKIP_TOKEN(parser); | |
766 | return 1; | |
767 | } | |
768 | ||
769 | else | |
770 | { | |
771 | return yaml_parser_set_parser_error_context(parser, | |
772 | "while parsing a block collection", POP(parser, parser->marks), | |
773 | "did not find expected '-' indicator", token->start_mark); | |
774 | } | |
775 | } | |
776 | ||
777 | /* | |
778 | * Parse the productions: | |
779 | * indentless_sequence ::= (BLOCK-ENTRY block_node?)+ | |
780 | * *********** * | |
781 | */ | |
782 | ||
783 | static int | |
784 | yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, | |
785 | yaml_event_t *event) | |
786 | { | |
787 | yaml_token_t *token; | |
788 | ||
789 | token = PEEK_TOKEN(parser); | |
790 | if (!token) return 0; | |
791 | ||
792 | if (token->type == YAML_BLOCK_ENTRY_TOKEN) | |
793 | { | |
794 | yaml_mark_t mark = token->end_mark; | |
795 | SKIP_TOKEN(parser); | |
796 | token = PEEK_TOKEN(parser); | |
797 | if (!token) return 0; | |
798 | if (token->type != YAML_BLOCK_ENTRY_TOKEN && | |
799 | token->type != YAML_KEY_TOKEN && | |
800 | token->type != YAML_VALUE_TOKEN && | |
801 | token->type != YAML_BLOCK_END_TOKEN) { | |
802 | if (!PUSH(parser, parser->states, | |
803 | YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE)) | |
804 | return 0; | |
805 | return yaml_parser_parse_node(parser, event, 1, 0); | |
806 | } | |
807 | else { | |
808 | parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE; | |
809 | return yaml_parser_process_empty_scalar(parser, event, mark); | |
810 | } | |
811 | } | |
812 | ||
813 | else | |
814 | { | |
815 | parser->state = POP(parser, parser->states); | |
816 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->start_mark); | |
817 | return 1; | |
818 | } | |
819 | } | |
820 | ||
821 | /* | |
822 | * Parse the productions: | |
823 | * block_mapping ::= BLOCK-MAPPING_START | |
824 | * ******************* | |
825 | * ((KEY block_node_or_indentless_sequence?)? | |
826 | * *** * | |
827 | * (VALUE block_node_or_indentless_sequence?)?)* | |
828 | * | |
829 | * BLOCK-END | |
830 | * ********* | |
831 | */ | |
832 | ||
833 | static int | |
834 | yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, | |
835 | yaml_event_t *event, int first) | |
836 | { | |
837 | yaml_token_t *token; | |
838 | ||
839 | if (first) { | |
840 | token = PEEK_TOKEN(parser); | |
841 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
842 | return 0; | |
843 | SKIP_TOKEN(parser); | |
844 | } | |
845 | ||
846 | token = PEEK_TOKEN(parser); | |
847 | if (!token) return 0; | |
848 | ||
849 | if (token->type == YAML_KEY_TOKEN) | |
850 | { | |
851 | yaml_mark_t mark = token->end_mark; | |
852 | SKIP_TOKEN(parser); | |
853 | token = PEEK_TOKEN(parser); | |
854 | if (!token) return 0; | |
855 | if (token->type != YAML_KEY_TOKEN && | |
856 | token->type != YAML_VALUE_TOKEN && | |
857 | token->type != YAML_BLOCK_END_TOKEN) { | |
858 | if (!PUSH(parser, parser->states, | |
859 | YAML_PARSE_BLOCK_MAPPING_VALUE_STATE)) | |
860 | return 0; | |
861 | return yaml_parser_parse_node(parser, event, 1, 1); | |
862 | } | |
863 | else { | |
864 | parser->state = YAML_PARSE_BLOCK_MAPPING_VALUE_STATE; | |
865 | return yaml_parser_process_empty_scalar(parser, event, mark); | |
866 | } | |
867 | } | |
868 | ||
869 | else if (token->type == YAML_BLOCK_END_TOKEN) | |
870 | { | |
871 | parser->state = POP(parser, parser->states); | |
872 | (void)POP(parser, parser->marks); | |
873 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); | |
874 | SKIP_TOKEN(parser); | |
875 | return 1; | |
876 | } | |
877 | ||
878 | else | |
879 | { | |
880 | return yaml_parser_set_parser_error_context(parser, | |
881 | "while parsing a block mapping", POP(parser, parser->marks), | |
882 | "did not find expected key", token->start_mark); | |
883 | } | |
884 | } | |
885 | ||
886 | /* | |
887 | * Parse the productions: | |
888 | * block_mapping ::= BLOCK-MAPPING_START | |
889 | * | |
890 | * ((KEY block_node_or_indentless_sequence?)? | |
891 | * | |
892 | * (VALUE block_node_or_indentless_sequence?)?)* | |
893 | * ***** * | |
894 | * BLOCK-END | |
895 | * | |
896 | */ | |
897 | ||
898 | static int | |
899 | yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, | |
900 | yaml_event_t *event) | |
901 | { | |
902 | yaml_token_t *token; | |
903 | ||
904 | token = PEEK_TOKEN(parser); | |
905 | if (!token) return 0; | |
906 | ||
907 | if (token->type == YAML_VALUE_TOKEN) | |
908 | { | |
909 | yaml_mark_t mark = token->end_mark; | |
910 | SKIP_TOKEN(parser); | |
911 | token = PEEK_TOKEN(parser); | |
912 | if (!token) return 0; | |
913 | if (token->type != YAML_KEY_TOKEN && | |
914 | token->type != YAML_VALUE_TOKEN && | |
915 | token->type != YAML_BLOCK_END_TOKEN) { | |
916 | if (!PUSH(parser, parser->states, | |
917 | YAML_PARSE_BLOCK_MAPPING_KEY_STATE)) | |
918 | return 0; | |
919 | return yaml_parser_parse_node(parser, event, 1, 1); | |
920 | } | |
921 | else { | |
922 | parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; | |
923 | return yaml_parser_process_empty_scalar(parser, event, mark); | |
924 | } | |
925 | } | |
926 | ||
927 | else | |
928 | { | |
929 | parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; | |
930 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); | |
931 | } | |
932 | } | |
933 | ||
934 | /* | |
935 | * Parse the productions: | |
936 | * flow_sequence ::= FLOW-SEQUENCE-START | |
937 | * ******************* | |
938 | * (flow_sequence_entry FLOW-ENTRY)* | |
939 | * * ********** | |
940 | * flow_sequence_entry? | |
941 | * * | |
942 | * FLOW-SEQUENCE-END | |
943 | * ***************** | |
944 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
945 | * * | |
946 | */ | |
947 | ||
948 | static int | |
949 | yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, | |
950 | yaml_event_t *event, int first) | |
951 | { | |
952 | yaml_token_t *token; | |
953 | ||
954 | if (first) { | |
955 | token = PEEK_TOKEN(parser); | |
956 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
957 | return 0; | |
958 | SKIP_TOKEN(parser); | |
959 | } | |
960 | ||
961 | token = PEEK_TOKEN(parser); | |
962 | if (!token) return 0; | |
963 | ||
964 | if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) | |
965 | { | |
966 | if (!first) { | |
967 | if (token->type == YAML_FLOW_ENTRY_TOKEN) { | |
968 | SKIP_TOKEN(parser); | |
969 | token = PEEK_TOKEN(parser); | |
970 | if (!token) return 0; | |
971 | } | |
972 | else { | |
973 | return yaml_parser_set_parser_error_context(parser, | |
974 | "while parsing a flow sequence", POP(parser, parser->marks), | |
975 | "did not find expected ',' or ']'", token->start_mark); | |
976 | } | |
977 | } | |
978 | ||
979 | if (token->type == YAML_KEY_TOKEN) { | |
980 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE; | |
981 | MAPPING_START_EVENT_INIT(*event, NULL, NULL, | |
982 | 1, YAML_FLOW_MAPPING_STYLE, | |
983 | token->start_mark, token->end_mark); | |
984 | SKIP_TOKEN(parser); | |
985 | return 1; | |
986 | } | |
987 | ||
988 | else if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
989 | if (!PUSH(parser, parser->states, | |
990 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE)) | |
991 | return 0; | |
992 | return yaml_parser_parse_node(parser, event, 0, 0); | |
993 | } | |
994 | } | |
995 | ||
996 | parser->state = POP(parser, parser->states); | |
997 | (void)POP(parser, parser->marks); | |
998 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); | |
999 | SKIP_TOKEN(parser); | |
1000 | return 1; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Parse the productions: | |
1005 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1006 | * *** * | |
1007 | */ | |
1008 | ||
1009 | static int | |
1010 | yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, | |
1011 | yaml_event_t *event) | |
1012 | { | |
1013 | yaml_token_t *token; | |
1014 | ||
1015 | token = PEEK_TOKEN(parser); | |
1016 | if (!token) return 0; | |
1017 | ||
1018 | if (token->type != YAML_VALUE_TOKEN && token->type != YAML_FLOW_ENTRY_TOKEN | |
1019 | && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
1020 | if (!PUSH(parser, parser->states, | |
1021 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE)) | |
1022 | return 0; | |
1023 | return yaml_parser_parse_node(parser, event, 0, 0); | |
1024 | } | |
1025 | else { | |
1026 | yaml_mark_t mark = token->end_mark; | |
1027 | SKIP_TOKEN(parser); | |
1028 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE; | |
1029 | return yaml_parser_process_empty_scalar(parser, event, mark); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Parse the productions: | |
1035 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1036 | * ***** * | |
1037 | */ | |
1038 | ||
1039 | static int | |
1040 | yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, | |
1041 | yaml_event_t *event) | |
1042 | { | |
1043 | yaml_token_t *token; | |
1044 | ||
1045 | token = PEEK_TOKEN(parser); | |
1046 | if (!token) return 0; | |
1047 | ||
1048 | if (token->type == YAML_VALUE_TOKEN) { | |
1049 | SKIP_TOKEN(parser); | |
1050 | token = PEEK_TOKEN(parser); | |
1051 | if (!token) return 0; | |
1052 | if (token->type != YAML_FLOW_ENTRY_TOKEN | |
1053 | && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
1054 | if (!PUSH(parser, parser->states, | |
1055 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE)) | |
1056 | return 0; | |
1057 | return yaml_parser_parse_node(parser, event, 0, 0); | |
1058 | } | |
1059 | } | |
1060 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE; | |
1061 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Parse the productions: | |
1066 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1067 | * * | |
1068 | */ | |
1069 | ||
1070 | static int | |
1071 | yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, | |
1072 | yaml_event_t *event) | |
1073 | { | |
1074 | yaml_token_t *token; | |
1075 | ||
1076 | token = PEEK_TOKEN(parser); | |
1077 | if (!token) return 0; | |
1078 | ||
1079 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE; | |
1080 | ||
1081 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->start_mark); | |
1082 | return 1; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Parse the productions: | |
1087 | * flow_mapping ::= FLOW-MAPPING-START | |
1088 | * ****************** | |
1089 | * (flow_mapping_entry FLOW-ENTRY)* | |
1090 | * * ********** | |
1091 | * flow_mapping_entry? | |
1092 | * ****************** | |
1093 | * FLOW-MAPPING-END | |
1094 | * **************** | |
1095 | * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1096 | * * *** * | |
1097 | */ | |
1098 | ||
1099 | static int | |
1100 | yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, | |
1101 | yaml_event_t *event, int first) | |
1102 | { | |
1103 | yaml_token_t *token; | |
1104 | ||
1105 | if (first) { | |
1106 | token = PEEK_TOKEN(parser); | |
1107 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
1108 | return 0; | |
1109 | SKIP_TOKEN(parser); | |
1110 | } | |
1111 | ||
1112 | token = PEEK_TOKEN(parser); | |
1113 | if (!token) return 0; | |
1114 | ||
1115 | if (token->type != YAML_FLOW_MAPPING_END_TOKEN) | |
1116 | { | |
1117 | if (!first) { | |
1118 | if (token->type == YAML_FLOW_ENTRY_TOKEN) { | |
1119 | SKIP_TOKEN(parser); | |
1120 | token = PEEK_TOKEN(parser); | |
1121 | if (!token) return 0; | |
1122 | } | |
1123 | else { | |
1124 | return yaml_parser_set_parser_error_context(parser, | |
1125 | "while parsing a flow mapping", POP(parser, parser->marks), | |
1126 | "did not find expected ',' or '}'", token->start_mark); | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (token->type == YAML_KEY_TOKEN) { | |
1131 | SKIP_TOKEN(parser); | |
1132 | token = PEEK_TOKEN(parser); | |
1133 | if (!token) return 0; | |
1134 | if (token->type != YAML_VALUE_TOKEN | |
1135 | && token->type != YAML_FLOW_ENTRY_TOKEN | |
1136 | && token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
1137 | if (!PUSH(parser, parser->states, | |
1138 | YAML_PARSE_FLOW_MAPPING_VALUE_STATE)) | |
1139 | return 0; | |
1140 | return yaml_parser_parse_node(parser, event, 0, 0); | |
1141 | } | |
1142 | else { | |
1143 | parser->state = YAML_PARSE_FLOW_MAPPING_VALUE_STATE; | |
1144 | return yaml_parser_process_empty_scalar(parser, event, | |
1145 | token->start_mark); | |
1146 | } | |
1147 | } | |
1148 | else if (token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
1149 | if (!PUSH(parser, parser->states, | |
1150 | YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE)) | |
1151 | return 0; | |
1152 | return yaml_parser_parse_node(parser, event, 0, 0); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | parser->state = POP(parser, parser->states); | |
1157 | (void)POP(parser, parser->marks); | |
1158 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); | |
1159 | SKIP_TOKEN(parser); | |
1160 | return 1; | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Parse the productions: | |
1165 | * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1166 | * * ***** * | |
1167 | */ | |
1168 | ||
1169 | static int | |
1170 | yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, | |
1171 | yaml_event_t *event, int empty) | |
1172 | { | |
1173 | yaml_token_t *token; | |
1174 | ||
1175 | token = PEEK_TOKEN(parser); | |
1176 | if (!token) return 0; | |
1177 | ||
1178 | if (empty) { | |
1179 | parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; | |
1180 | return yaml_parser_process_empty_scalar(parser, event, | |
1181 | token->start_mark); | |
1182 | } | |
1183 | ||
1184 | if (token->type == YAML_VALUE_TOKEN) { | |
1185 | SKIP_TOKEN(parser); | |
1186 | token = PEEK_TOKEN(parser); | |
1187 | if (!token) return 0; | |
1188 | if (token->type != YAML_FLOW_ENTRY_TOKEN | |
1189 | && token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
1190 | if (!PUSH(parser, parser->states, | |
1191 | YAML_PARSE_FLOW_MAPPING_KEY_STATE)) | |
1192 | return 0; | |
1193 | return yaml_parser_parse_node(parser, event, 0, 0); | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; | |
1198 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Generate an empty scalar event. | |
1203 | */ | |
1204 | ||
1205 | static int | |
1206 | yaml_parser_process_empty_scalar(yaml_parser_t *parser, yaml_event_t *event, | |
1207 | yaml_mark_t mark) | |
1208 | { | |
1209 | yaml_char_t *value; | |
1210 | ||
1211 | value = YAML_MALLOC(1); | |
1212 | if (!value) { | |
1213 | parser->error = YAML_MEMORY_ERROR; | |
1214 | return 0; | |
1215 | } | |
1216 | value[0] = '\0'; | |
1217 | ||
1218 | SCALAR_EVENT_INIT(*event, NULL, NULL, value, 0, | |
1219 | 1, 0, YAML_PLAIN_SCALAR_STYLE, mark, mark); | |
1220 | ||
1221 | return 1; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Parse directives. | |
1226 | */ | |
1227 | ||
1228 | static int | |
1229 | yaml_parser_process_directives(yaml_parser_t *parser, | |
1230 | yaml_version_directive_t **version_directive_ref, | |
1231 | yaml_tag_directive_t **tag_directives_start_ref, | |
1232 | yaml_tag_directive_t **tag_directives_end_ref) | |
1233 | { | |
1234 | yaml_tag_directive_t default_tag_directives[] = { | |
1235 | {(yaml_char_t *)"!", (yaml_char_t *)"!"}, | |
1236 | {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"}, | |
1237 | {NULL, NULL} | |
1238 | }; | |
1239 | yaml_tag_directive_t *default_tag_directive; | |
1240 | yaml_version_directive_t *version_directive = NULL; | |
1241 | struct { | |
1242 | yaml_tag_directive_t *start; | |
1243 | yaml_tag_directive_t *end; | |
1244 | yaml_tag_directive_t *top; | |
1245 | } tag_directives = { NULL, NULL, NULL }; | |
1246 | yaml_token_t *token; | |
1247 | ||
1248 | if (!STACK_INIT(parser, tag_directives, yaml_tag_directive_t*)) | |
1249 | goto error; | |
1250 | ||
1251 | token = PEEK_TOKEN(parser); | |
1252 | if (!token) goto error; | |
1253 | ||
1254 | while (token->type == YAML_VERSION_DIRECTIVE_TOKEN || | |
1255 | token->type == YAML_TAG_DIRECTIVE_TOKEN) | |
1256 | { | |
1257 | if (token->type == YAML_VERSION_DIRECTIVE_TOKEN) { | |
1258 | if (version_directive) { | |
1259 | yaml_parser_set_parser_error(parser, | |
1260 | "found duplicate %YAML directive", token->start_mark); | |
1261 | goto error; | |
1262 | } | |
1263 | if (token->data.version_directive.major != 1 | |
1264 | || token->data.version_directive.minor != 1) { | |
1265 | yaml_parser_set_parser_error(parser, | |
1266 | "found incompatible YAML document", token->start_mark); | |
1267 | goto error; | |
1268 | } | |
1269 | version_directive = YAML_MALLOC_STATIC(yaml_version_directive_t); | |
1270 | if (!version_directive) { | |
1271 | parser->error = YAML_MEMORY_ERROR; | |
1272 | goto error; | |
1273 | } | |
1274 | version_directive->major = token->data.version_directive.major; | |
1275 | version_directive->minor = token->data.version_directive.minor; | |
1276 | } | |
1277 | ||
1278 | else if (token->type == YAML_TAG_DIRECTIVE_TOKEN) { | |
1279 | yaml_tag_directive_t value; | |
1280 | value.handle = token->data.tag_directive.handle; | |
1281 | value.prefix = token->data.tag_directive.prefix; | |
1282 | ||
1283 | if (!yaml_parser_append_tag_directive(parser, value, 0, | |
1284 | token->start_mark)) | |
1285 | goto error; | |
1286 | if (!PUSH(parser, tag_directives, value)) | |
1287 | goto error; | |
1288 | } | |
1289 | ||
1290 | SKIP_TOKEN(parser); | |
1291 | token = PEEK_TOKEN(parser); | |
1292 | if (!token) goto error; | |
1293 | } | |
1294 | ||
1295 | for (default_tag_directive = default_tag_directives; | |
1296 | default_tag_directive->handle; default_tag_directive++) { | |
1297 | if (!yaml_parser_append_tag_directive(parser, *default_tag_directive, 1, | |
1298 | token->start_mark)) | |
1299 | goto error; | |
1300 | } | |
1301 | ||
1302 | if (version_directive_ref) { | |
1303 | *version_directive_ref = version_directive; | |
1304 | } | |
1305 | if (tag_directives_start_ref) { | |
1306 | if (STACK_EMPTY(parser, tag_directives)) { | |
1307 | *tag_directives_start_ref = *tag_directives_end_ref = NULL; | |
1308 | STACK_DEL(parser, tag_directives); | |
1309 | } | |
1310 | else { | |
1311 | *tag_directives_start_ref = tag_directives.start; | |
1312 | *tag_directives_end_ref = tag_directives.top; | |
1313 | } | |
1314 | } | |
1315 | else { | |
1316 | STACK_DEL(parser, tag_directives); | |
1317 | } | |
1318 | ||
1319 | if (!version_directive_ref) | |
1320 | yaml_free(version_directive); | |
1321 | return 1; | |
1322 | ||
1323 | error: | |
1324 | yaml_free(version_directive); | |
1325 | while (!STACK_EMPTY(parser, tag_directives)) { | |
1326 | yaml_tag_directive_t tag_directive = POP(parser, tag_directives); | |
1327 | yaml_free(tag_directive.handle); | |
1328 | yaml_free(tag_directive.prefix); | |
1329 | } | |
1330 | STACK_DEL(parser, tag_directives); | |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * Append a tag directive to the directives stack. | |
1336 | */ | |
1337 | ||
1338 | static int | |
1339 | yaml_parser_append_tag_directive(yaml_parser_t *parser, | |
1340 | yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark) | |
1341 | { | |
1342 | yaml_tag_directive_t *tag_directive; | |
1343 | yaml_tag_directive_t copy = { NULL, NULL }; | |
1344 | ||
1345 | for (tag_directive = parser->tag_directives.start; | |
1346 | tag_directive != parser->tag_directives.top; tag_directive ++) { | |
1347 | if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) { | |
1348 | if (allow_duplicates) | |
1349 | return 1; | |
1350 | return yaml_parser_set_parser_error(parser, | |
1351 | "found duplicate %TAG directive", mark); | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | copy.handle = yaml_strdup(value.handle); | |
1356 | copy.prefix = yaml_strdup(value.prefix); | |
1357 | if (!copy.handle || !copy.prefix) { | |
1358 | parser->error = YAML_MEMORY_ERROR; | |
1359 | goto error; | |
1360 | } | |
1361 | ||
1362 | if (!PUSH(parser, parser->tag_directives, copy)) | |
1363 | goto error; | |
1364 | ||
1365 | return 1; | |
1366 | ||
1367 | error: | |
1368 | yaml_free(copy.handle); | |
1369 | yaml_free(copy.prefix); | |
1370 | return 0; | |
1371 | } | |
1372 |