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Commit | Line | Data |
---|---|---|
1eb01be7 KS |
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 | ||
625fcfe9 | 42 | #include "yaml_private.h" |
1eb01be7 | 43 | |
1eb01be7 | 44 | /* |
625fcfe9 | 45 | * Peek the next token in the token queue. |
1eb01be7 KS |
46 | */ |
47 | ||
625fcfe9 KS |
48 | #define PEEK_TOKEN(parser) \ |
49 | ((parser->token_available || yaml_parser_fetch_more_tokens(parser)) ? \ | |
50 | parser->tokens.head : NULL) | |
1eb01be7 | 51 | |
625fcfe9 KS |
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); | |
1eb01be7 | 69 | |
52fba2c6 KS |
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 | /* | |
625fcfe9 | 84 | * State functions. |
52fba2c6 KS |
85 | */ |
86 | ||
87 | static int | |
625fcfe9 | 88 | yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event); |
52fba2c6 | 89 | |
ab01bac8 | 90 | static int |
625fcfe9 | 91 | yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event); |
ab01bac8 | 92 | |
52fba2c6 | 93 | static int |
625fcfe9 KS |
94 | yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, |
95 | int implicit); | |
52fba2c6 KS |
96 | |
97 | static int | |
625fcfe9 | 98 | yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event); |
1eb01be7 | 99 | |
625fcfe9 KS |
100 | static int |
101 | yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event); | |
1eb01be7 | 102 | |
625fcfe9 KS |
103 | static int |
104 | yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, | |
1eb01be7 KS |
105 | int block, int indentless_sequence); |
106 | ||
625fcfe9 KS |
107 | static int |
108 | yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, | |
109 | yaml_event_t *event, int first); | |
1eb01be7 | 110 | |
625fcfe9 KS |
111 | static int |
112 | yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, | |
113 | yaml_event_t *event); | |
1eb01be7 | 114 | |
625fcfe9 KS |
115 | static int |
116 | yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, | |
117 | yaml_event_t *event, int first); | |
1eb01be7 | 118 | |
625fcfe9 KS |
119 | static int |
120 | yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, | |
121 | yaml_event_t *event); | |
1eb01be7 | 122 | |
625fcfe9 KS |
123 | static int |
124 | yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, | |
125 | yaml_event_t *event, int first); | |
1eb01be7 | 126 | |
625fcfe9 KS |
127 | static int |
128 | yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, | |
129 | yaml_event_t *event); | |
1eb01be7 | 130 | |
625fcfe9 KS |
131 | static int |
132 | yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, | |
133 | yaml_event_t *event); | |
1eb01be7 | 134 | |
625fcfe9 KS |
135 | static int |
136 | yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, | |
137 | yaml_event_t *event); | |
1eb01be7 | 138 | |
625fcfe9 KS |
139 | static int |
140 | yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, | |
141 | yaml_event_t *event, int first); | |
1eb01be7 | 142 | |
625fcfe9 KS |
143 | static int |
144 | yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, | |
145 | yaml_event_t *event, int empty); | |
1eb01be7 | 146 | |
52fba2c6 KS |
147 | /* |
148 | * Utility functions. | |
149 | */ | |
150 | ||
625fcfe9 KS |
151 | static int |
152 | yaml_parser_process_empty_scalar(yaml_parser_t *parser, | |
153 | yaml_event_t *event, yaml_mark_t mark); | |
52fba2c6 KS |
154 | |
155 | static int | |
625fcfe9 KS |
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); | |
52fba2c6 | 164 | |
1eb01be7 | 165 | /* |
625fcfe9 | 166 | * Get the next event. |
1eb01be7 KS |
167 | */ |
168 | ||
625fcfe9 KS |
169 | YAML_DECLARE(int) |
170 | yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event) | |
1eb01be7 | 171 | { |
625fcfe9 KS |
172 | assert(parser); /* Non-NULL parser object is expected. */ |
173 | assert(event); /* Non-NULL event object is expected. */ | |
1eb01be7 | 174 | |
5a00d8fe KS |
175 | /* Erase the event object. */ |
176 | ||
177 | memset(event, 0, sizeof(yaml_event_t)); | |
178 | ||
625fcfe9 | 179 | /* No events after the end of the stream or error. */ |
1eb01be7 | 180 | |
625fcfe9 KS |
181 | if (parser->stream_end_produced || parser->error || |
182 | parser->state == YAML_PARSE_END_STATE) { | |
625fcfe9 | 183 | return 1; |
1eb01be7 KS |
184 | } |
185 | ||
625fcfe9 | 186 | /* Generate the next event. */ |
1eb01be7 | 187 | |
625fcfe9 | 188 | return yaml_parser_state_machine(parser, event); |
1eb01be7 KS |
189 | } |
190 | ||
52fba2c6 KS |
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 | ||
52fba2c6 | 220 | |
1eb01be7 KS |
221 | /* |
222 | * State dispatcher. | |
223 | */ | |
224 | ||
625fcfe9 KS |
225 | static int |
226 | yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event) | |
1eb01be7 | 227 | { |
1eb01be7 KS |
228 | switch (parser->state) |
229 | { | |
230 | case YAML_PARSE_STREAM_START_STATE: | |
625fcfe9 | 231 | return yaml_parser_parse_stream_start(parser, event); |
1eb01be7 KS |
232 | |
233 | case YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE: | |
625fcfe9 | 234 | return yaml_parser_parse_document_start(parser, event, 1); |
1eb01be7 KS |
235 | |
236 | case YAML_PARSE_DOCUMENT_START_STATE: | |
625fcfe9 | 237 | return yaml_parser_parse_document_start(parser, event, 0); |
1eb01be7 KS |
238 | |
239 | case YAML_PARSE_DOCUMENT_CONTENT_STATE: | |
625fcfe9 | 240 | return yaml_parser_parse_document_content(parser, event); |
1eb01be7 KS |
241 | |
242 | case YAML_PARSE_DOCUMENT_END_STATE: | |
625fcfe9 | 243 | return yaml_parser_parse_document_end(parser, event); |
1eb01be7 KS |
244 | |
245 | case YAML_PARSE_BLOCK_NODE_STATE: | |
625fcfe9 | 246 | return yaml_parser_parse_node(parser, event, 1, 0); |
1eb01be7 KS |
247 | |
248 | case YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE: | |
625fcfe9 | 249 | return yaml_parser_parse_node(parser, event, 1, 1); |
1eb01be7 KS |
250 | |
251 | case YAML_PARSE_FLOW_NODE_STATE: | |
625fcfe9 | 252 | return yaml_parser_parse_node(parser, event, 0, 0); |
1eb01be7 KS |
253 | |
254 | case YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE: | |
625fcfe9 | 255 | return yaml_parser_parse_block_sequence_entry(parser, event, 1); |
1eb01be7 KS |
256 | |
257 | case YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE: | |
625fcfe9 | 258 | return yaml_parser_parse_block_sequence_entry(parser, event, 0); |
1eb01be7 KS |
259 | |
260 | case YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE: | |
625fcfe9 | 261 | return yaml_parser_parse_indentless_sequence_entry(parser, event); |
1eb01be7 KS |
262 | |
263 | case YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE: | |
625fcfe9 | 264 | return yaml_parser_parse_block_mapping_key(parser, event, 1); |
1eb01be7 KS |
265 | |
266 | case YAML_PARSE_BLOCK_MAPPING_KEY_STATE: | |
625fcfe9 | 267 | return yaml_parser_parse_block_mapping_key(parser, event, 0); |
1eb01be7 KS |
268 | |
269 | case YAML_PARSE_BLOCK_MAPPING_VALUE_STATE: | |
625fcfe9 | 270 | return yaml_parser_parse_block_mapping_value(parser, event); |
1eb01be7 KS |
271 | |
272 | case YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE: | |
625fcfe9 | 273 | return yaml_parser_parse_flow_sequence_entry(parser, event, 1); |
1eb01be7 KS |
274 | |
275 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE: | |
625fcfe9 | 276 | return yaml_parser_parse_flow_sequence_entry(parser, event, 0); |
1eb01be7 KS |
277 | |
278 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE: | |
625fcfe9 | 279 | return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event); |
1eb01be7 KS |
280 | |
281 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE: | |
625fcfe9 | 282 | return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event); |
1eb01be7 KS |
283 | |
284 | case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE: | |
625fcfe9 | 285 | return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event); |
1eb01be7 KS |
286 | |
287 | case YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE: | |
625fcfe9 | 288 | return yaml_parser_parse_flow_mapping_key(parser, event, 1); |
1eb01be7 KS |
289 | |
290 | case YAML_PARSE_FLOW_MAPPING_KEY_STATE: | |
625fcfe9 | 291 | return yaml_parser_parse_flow_mapping_key(parser, event, 0); |
1eb01be7 KS |
292 | |
293 | case YAML_PARSE_FLOW_MAPPING_VALUE_STATE: | |
625fcfe9 | 294 | return yaml_parser_parse_flow_mapping_value(parser, event, 0); |
1eb01be7 KS |
295 | |
296 | case YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE: | |
625fcfe9 KS |
297 | return yaml_parser_parse_flow_mapping_value(parser, event, 1); |
298 | ||
299 | default: | |
300 | assert(1); /* Invalid state. */ | |
1eb01be7 | 301 | } |
54815ffd KS |
302 | |
303 | return 0; | |
1eb01be7 KS |
304 | } |
305 | ||
52fba2c6 KS |
306 | /* |
307 | * Parse the production: | |
308 | * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END | |
309 | * ************ | |
310 | */ | |
311 | ||
625fcfe9 KS |
312 | static int |
313 | yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event) | |
52fba2c6 KS |
314 | { |
315 | yaml_token_t *token; | |
52fba2c6 | 316 | |
625fcfe9 KS |
317 | token = PEEK_TOKEN(parser); |
318 | if (!token) return 0; | |
52fba2c6 | 319 | |
625fcfe9 KS |
320 | if (token->type != YAML_STREAM_START_TOKEN) { |
321 | return yaml_parser_set_parser_error(parser, | |
6be8109b | 322 | "did not find expected <stream-start>", token->start_mark); |
52fba2c6 KS |
323 | } |
324 | ||
325 | parser->state = YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE; | |
625fcfe9 KS |
326 | STREAM_START_EVENT_INIT(*event, token->data.stream_start.encoding, |
327 | token->start_mark, token->start_mark); | |
328 | SKIP_TOKEN(parser); | |
52fba2c6 | 329 | |
625fcfe9 | 330 | return 1; |
52fba2c6 KS |
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 | ||
625fcfe9 KS |
341 | static int |
342 | yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, | |
343 | int implicit) | |
52fba2c6 KS |
344 | { |
345 | yaml_token_t *token; | |
625fcfe9 KS |
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 }; | |
52fba2c6 | 351 | |
625fcfe9 KS |
352 | token = PEEK_TOKEN(parser); |
353 | if (!token) return 0; | |
52fba2c6 | 354 | |
5e52c319 KS |
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 | ||
52fba2c6 KS |
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 | { | |
625fcfe9 KS |
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; | |
52fba2c6 | 377 | parser->state = YAML_PARSE_BLOCK_NODE_STATE; |
625fcfe9 | 378 | DOCUMENT_START_EVENT_INIT(*event, NULL, NULL, NULL, 1, |
52fba2c6 | 379 | token->start_mark, token->start_mark); |
625fcfe9 | 380 | return 1; |
52fba2c6 KS |
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; | |
625fcfe9 KS |
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; | |
52fba2c6 KS |
394 | if (token->type != YAML_DOCUMENT_START_TOKEN) { |
395 | yaml_parser_set_parser_error(parser, | |
6be8109b | 396 | "did not find expected <document start>", token->start_mark); |
625fcfe9 | 397 | goto error; |
52fba2c6 | 398 | } |
625fcfe9 KS |
399 | if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE)) |
400 | goto error; | |
52fba2c6 | 401 | parser->state = YAML_PARSE_DOCUMENT_CONTENT_STATE; |
625fcfe9 KS |
402 | end_mark = token->end_mark; |
403 | DOCUMENT_START_EVENT_INIT(*event, version_directive, | |
404 | tag_directives.start, tag_directives.end, 0, | |
52fba2c6 | 405 | start_mark, end_mark); |
625fcfe9 KS |
406 | SKIP_TOKEN(parser); |
407 | version_directive = NULL; | |
408 | tag_directives.start = tag_directives.end = NULL; | |
409 | return 1; | |
52fba2c6 KS |
410 | } |
411 | ||
412 | /* Parse the stream end. */ | |
413 | ||
414 | else | |
415 | { | |
52fba2c6 | 416 | parser->state = YAML_PARSE_END_STATE; |
625fcfe9 KS |
417 | STREAM_END_EVENT_INIT(*event, token->start_mark, token->end_mark); |
418 | SKIP_TOKEN(parser); | |
419 | return 1; | |
52fba2c6 | 420 | } |
625fcfe9 KS |
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; | |
52fba2c6 KS |
431 | } |
432 | ||
433 | /* | |
434 | * Parse the productions: | |
435 | * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* | |
436 | * *********** | |
437 | */ | |
438 | ||
625fcfe9 KS |
439 | static int |
440 | yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event) | |
52fba2c6 KS |
441 | { |
442 | yaml_token_t *token; | |
443 | ||
625fcfe9 KS |
444 | token = PEEK_TOKEN(parser); |
445 | if (!token) return 0; | |
52fba2c6 KS |
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) { | |
625fcfe9 KS |
452 | parser->state = POP(parser, parser->states); |
453 | return yaml_parser_process_empty_scalar(parser, event, | |
454 | token->start_mark); | |
52fba2c6 KS |
455 | } |
456 | else { | |
625fcfe9 | 457 | return yaml_parser_parse_node(parser, event, 1, 0); |
52fba2c6 KS |
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 | ||
625fcfe9 KS |
469 | static int |
470 | yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event) | |
52fba2c6 KS |
471 | { |
472 | yaml_token_t *token; | |
52fba2c6 KS |
473 | yaml_mark_t start_mark, end_mark; |
474 | int implicit = 1; | |
475 | ||
625fcfe9 KS |
476 | token = PEEK_TOKEN(parser); |
477 | if (!token) return 0; | |
52fba2c6 KS |
478 | |
479 | start_mark = end_mark = token->start_mark; | |
480 | ||
5e52c319 | 481 | if (token->type == YAML_DOCUMENT_END_TOKEN) { |
52fba2c6 | 482 | end_mark = token->end_mark; |
625fcfe9 | 483 | SKIP_TOKEN(parser); |
52fba2c6 KS |
484 | implicit = 0; |
485 | } | |
486 | ||
625fcfe9 KS |
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); | |
ab01bac8 | 491 | } |
ab01bac8 | 492 | |
ab01bac8 | 493 | parser->state = YAML_PARSE_DOCUMENT_START_STATE; |
625fcfe9 | 494 | DOCUMENT_END_EVENT_INIT(*event, implicit, start_mark, end_mark); |
ab01bac8 | 495 | |
625fcfe9 | 496 | return 1; |
52fba2c6 KS |
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 | ||
625fcfe9 KS |
528 | static int |
529 | yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, | |
52fba2c6 KS |
530 | int block, int indentless_sequence) |
531 | { | |
532 | yaml_token_t *token; | |
52fba2c6 KS |
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 | ||
625fcfe9 KS |
540 | token = PEEK_TOKEN(parser); |
541 | if (!token) return 0; | |
52fba2c6 KS |
542 | |
543 | if (token->type == YAML_ALIAS_TOKEN) | |
544 | { | |
625fcfe9 KS |
545 | parser->state = POP(parser, parser->states); |
546 | ALIAS_EVENT_INIT(*event, token->data.alias.value, | |
52fba2c6 | 547 | token->start_mark, token->end_mark); |
625fcfe9 KS |
548 | SKIP_TOKEN(parser); |
549 | return 1; | |
52fba2c6 KS |
550 | } |
551 | ||
552 | else | |
553 | { | |
554 | start_mark = end_mark = token->start_mark; | |
555 | ||
556 | if (token->type == YAML_ANCHOR_TOKEN) | |
557 | { | |
52fba2c6 KS |
558 | anchor = token->data.anchor.value; |
559 | start_mark = token->start_mark; | |
560 | end_mark = token->end_mark; | |
625fcfe9 KS |
561 | SKIP_TOKEN(parser); |
562 | token = PEEK_TOKEN(parser); | |
52fba2c6 KS |
563 | if (!token) goto error; |
564 | if (token->type == YAML_TAG_TOKEN) | |
565 | { | |
52fba2c6 KS |
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; | |
625fcfe9 KS |
570 | SKIP_TOKEN(parser); |
571 | token = PEEK_TOKEN(parser); | |
52fba2c6 KS |
572 | if (!token) goto error; |
573 | } | |
574 | } | |
575 | else if (token->type == YAML_TAG_TOKEN) | |
576 | { | |
52fba2c6 KS |
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; | |
625fcfe9 KS |
581 | SKIP_TOKEN(parser); |
582 | token = PEEK_TOKEN(parser); | |
52fba2c6 KS |
583 | if (!token) goto error; |
584 | if (token->type == YAML_ANCHOR_TOKEN) | |
585 | { | |
52fba2c6 KS |
586 | anchor = token->data.anchor.value; |
587 | end_mark = token->end_mark; | |
625fcfe9 KS |
588 | SKIP_TOKEN(parser); |
589 | token = PEEK_TOKEN(parser); | |
52fba2c6 KS |
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 { | |
625fcfe9 KS |
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); | |
52fba2c6 KS |
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 | } | |
625fcfe9 | 613 | memcpy(tag, tag_directive->prefix, prefix_len); |
52fba2c6 KS |
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 | } | |
625fcfe9 | 622 | if (!tag) { |
52fba2c6 KS |
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; | |
625fcfe9 | 635 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, |
52fba2c6 | 636 | YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); |
625fcfe9 | 637 | return 1; |
52fba2c6 KS |
638 | } |
639 | else { | |
640 | if (token->type == YAML_SCALAR_TOKEN) { | |
641 | int plain_implicit = 0; | |
642 | int quoted_implicit = 0; | |
52fba2c6 KS |
643 | end_mark = token->end_mark; |
644 | if ((token->data.scalar.style == YAML_PLAIN_SCALAR_STYLE && !tag) | |
ab01bac8 | 645 | || (tag && strcmp((char *)tag, "!") == 0)) { |
52fba2c6 KS |
646 | plain_implicit = 1; |
647 | } | |
648 | else if (!tag) { | |
649 | quoted_implicit = 1; | |
650 | } | |
625fcfe9 KS |
651 | parser->state = POP(parser, parser->states); |
652 | SCALAR_EVENT_INIT(*event, anchor, tag, | |
52fba2c6 KS |
653 | token->data.scalar.value, token->data.scalar.length, |
654 | plain_implicit, quoted_implicit, | |
655 | token->data.scalar.style, start_mark, end_mark); | |
625fcfe9 KS |
656 | SKIP_TOKEN(parser); |
657 | return 1; | |
52fba2c6 KS |
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; | |
625fcfe9 | 662 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, |
52fba2c6 | 663 | YAML_FLOW_SEQUENCE_STYLE, start_mark, end_mark); |
625fcfe9 | 664 | return 1; |
52fba2c6 KS |
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; | |
625fcfe9 | 669 | MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, |
52fba2c6 | 670 | YAML_FLOW_MAPPING_STYLE, start_mark, end_mark); |
625fcfe9 | 671 | return 1; |
52fba2c6 KS |
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; | |
625fcfe9 | 676 | SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, |
52fba2c6 | 677 | YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); |
625fcfe9 | 678 | return 1; |
52fba2c6 KS |
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; | |
625fcfe9 | 683 | MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, |
52fba2c6 | 684 | YAML_BLOCK_MAPPING_STYLE, start_mark, end_mark); |
625fcfe9 | 685 | return 1; |
52fba2c6 KS |
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'; | |
625fcfe9 KS |
694 | parser->state = POP(parser, parser->states); |
695 | SCALAR_EVENT_INIT(*event, anchor, tag, value, 0, | |
52fba2c6 KS |
696 | implicit, 0, YAML_PLAIN_SCALAR_STYLE, |
697 | start_mark, end_mark); | |
625fcfe9 | 698 | return 1; |
52fba2c6 KS |
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, | |
6be8109b | 704 | "did not find expected node content", token->start_mark); |
52fba2c6 KS |
705 | goto error; |
706 | } | |
52fba2c6 KS |
707 | } |
708 | } | |
709 | ||
710 | error: | |
711 | yaml_free(anchor); | |
712 | yaml_free(tag_handle); | |
713 | yaml_free(tag_suffix); | |
714 | yaml_free(tag); | |
715 | ||
625fcfe9 | 716 | return 0; |
52fba2c6 KS |
717 | } |
718 | ||
719 | /* | |
720 | * Parse the productions: | |
721 | * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END | |
722 | * ******************** *********** * ********* | |
723 | */ | |
724 | ||
625fcfe9 KS |
725 | static int |
726 | yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, | |
727 | yaml_event_t *event, int first) | |
52fba2c6 KS |
728 | { |
729 | yaml_token_t *token; | |
52fba2c6 KS |
730 | |
731 | if (first) { | |
625fcfe9 KS |
732 | token = PEEK_TOKEN(parser); |
733 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
734 | return 0; | |
735 | SKIP_TOKEN(parser); | |
52fba2c6 KS |
736 | } |
737 | ||
625fcfe9 KS |
738 | token = PEEK_TOKEN(parser); |
739 | if (!token) return 0; | |
52fba2c6 KS |
740 | |
741 | if (token->type == YAML_BLOCK_ENTRY_TOKEN) | |
742 | { | |
743 | yaml_mark_t mark = token->end_mark; | |
625fcfe9 KS |
744 | SKIP_TOKEN(parser); |
745 | token = PEEK_TOKEN(parser); | |
746 | if (!token) return 0; | |
52fba2c6 KS |
747 | if (token->type != YAML_BLOCK_ENTRY_TOKEN && |
748 | token->type != YAML_BLOCK_END_TOKEN) { | |
625fcfe9 | 749 | if (!PUSH(parser, parser->states, |
52fba2c6 | 750 | YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE)) |
625fcfe9 KS |
751 | return 0; |
752 | return yaml_parser_parse_node(parser, event, 1, 0); | |
52fba2c6 KS |
753 | } |
754 | else { | |
755 | parser->state = YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE; | |
625fcfe9 | 756 | return yaml_parser_process_empty_scalar(parser, event, mark); |
52fba2c6 KS |
757 | } |
758 | } | |
759 | ||
760 | else if (token->type == YAML_BLOCK_END_TOKEN) | |
761 | { | |
c9b74def | 762 | yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ |
625fcfe9 | 763 | parser->state = POP(parser, parser->states); |
c9b74def | 764 | dummy_mark = POP(parser, parser->marks); |
625fcfe9 KS |
765 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); |
766 | SKIP_TOKEN(parser); | |
767 | return 1; | |
52fba2c6 KS |
768 | } |
769 | ||
770 | else | |
771 | { | |
625fcfe9 KS |
772 | return yaml_parser_set_parser_error_context(parser, |
773 | "while parsing a block collection", POP(parser, parser->marks), | |
6be8109b | 774 | "did not find expected '-' indicator", token->start_mark); |
52fba2c6 KS |
775 | } |
776 | } | |
777 | ||
778 | /* | |
779 | * Parse the productions: | |
780 | * indentless_sequence ::= (BLOCK-ENTRY block_node?)+ | |
781 | * *********** * | |
782 | */ | |
783 | ||
625fcfe9 KS |
784 | static int |
785 | yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, | |
786 | yaml_event_t *event) | |
52fba2c6 KS |
787 | { |
788 | yaml_token_t *token; | |
52fba2c6 | 789 | |
625fcfe9 KS |
790 | token = PEEK_TOKEN(parser); |
791 | if (!token) return 0; | |
52fba2c6 KS |
792 | |
793 | if (token->type == YAML_BLOCK_ENTRY_TOKEN) | |
794 | { | |
795 | yaml_mark_t mark = token->end_mark; | |
625fcfe9 KS |
796 | SKIP_TOKEN(parser); |
797 | token = PEEK_TOKEN(parser); | |
798 | if (!token) return 0; | |
52fba2c6 | 799 | if (token->type != YAML_BLOCK_ENTRY_TOKEN && |
625fcfe9 KS |
800 | token->type != YAML_KEY_TOKEN && |
801 | token->type != YAML_VALUE_TOKEN && | |
52fba2c6 | 802 | token->type != YAML_BLOCK_END_TOKEN) { |
625fcfe9 | 803 | if (!PUSH(parser, parser->states, |
52fba2c6 | 804 | YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE)) |
625fcfe9 KS |
805 | return 0; |
806 | return yaml_parser_parse_node(parser, event, 1, 0); | |
52fba2c6 KS |
807 | } |
808 | else { | |
809 | parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE; | |
625fcfe9 | 810 | return yaml_parser_process_empty_scalar(parser, event, mark); |
52fba2c6 KS |
811 | } |
812 | } | |
813 | ||
814 | else | |
815 | { | |
625fcfe9 KS |
816 | parser->state = POP(parser, parser->states); |
817 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->start_mark); | |
818 | return 1; | |
52fba2c6 KS |
819 | } |
820 | } | |
821 | ||
822 | /* | |
823 | * Parse the productions: | |
824 | * block_mapping ::= BLOCK-MAPPING_START | |
825 | * ******************* | |
826 | * ((KEY block_node_or_indentless_sequence?)? | |
827 | * *** * | |
828 | * (VALUE block_node_or_indentless_sequence?)?)* | |
829 | * | |
830 | * BLOCK-END | |
831 | * ********* | |
832 | */ | |
833 | ||
625fcfe9 KS |
834 | static int |
835 | yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, | |
836 | yaml_event_t *event, int first) | |
52fba2c6 KS |
837 | { |
838 | yaml_token_t *token; | |
52fba2c6 KS |
839 | |
840 | if (first) { | |
625fcfe9 KS |
841 | token = PEEK_TOKEN(parser); |
842 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
843 | return 0; | |
844 | SKIP_TOKEN(parser); | |
52fba2c6 KS |
845 | } |
846 | ||
625fcfe9 KS |
847 | token = PEEK_TOKEN(parser); |
848 | if (!token) return 0; | |
52fba2c6 KS |
849 | |
850 | if (token->type == YAML_KEY_TOKEN) | |
851 | { | |
852 | yaml_mark_t mark = token->end_mark; | |
625fcfe9 KS |
853 | SKIP_TOKEN(parser); |
854 | token = PEEK_TOKEN(parser); | |
855 | if (!token) return 0; | |
52fba2c6 KS |
856 | if (token->type != YAML_KEY_TOKEN && |
857 | token->type != YAML_VALUE_TOKEN && | |
858 | token->type != YAML_BLOCK_END_TOKEN) { | |
625fcfe9 | 859 | if (!PUSH(parser, parser->states, |
52fba2c6 | 860 | YAML_PARSE_BLOCK_MAPPING_VALUE_STATE)) |
625fcfe9 KS |
861 | return 0; |
862 | return yaml_parser_parse_node(parser, event, 1, 1); | |
52fba2c6 KS |
863 | } |
864 | else { | |
865 | parser->state = YAML_PARSE_BLOCK_MAPPING_VALUE_STATE; | |
625fcfe9 | 866 | return yaml_parser_process_empty_scalar(parser, event, mark); |
52fba2c6 KS |
867 | } |
868 | } | |
869 | ||
870 | else if (token->type == YAML_BLOCK_END_TOKEN) | |
871 | { | |
c9b74def | 872 | yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ |
625fcfe9 | 873 | parser->state = POP(parser, parser->states); |
c9b74def | 874 | dummy_mark = POP(parser, parser->marks); |
625fcfe9 KS |
875 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); |
876 | SKIP_TOKEN(parser); | |
877 | return 1; | |
52fba2c6 KS |
878 | } |
879 | ||
880 | else | |
881 | { | |
625fcfe9 KS |
882 | return yaml_parser_set_parser_error_context(parser, |
883 | "while parsing a block mapping", POP(parser, parser->marks), | |
6be8109b | 884 | "did not find expected key", token->start_mark); |
52fba2c6 KS |
885 | } |
886 | } | |
887 | ||
888 | /* | |
889 | * Parse the productions: | |
890 | * block_mapping ::= BLOCK-MAPPING_START | |
891 | * | |
892 | * ((KEY block_node_or_indentless_sequence?)? | |
893 | * | |
894 | * (VALUE block_node_or_indentless_sequence?)?)* | |
895 | * ***** * | |
896 | * BLOCK-END | |
897 | * | |
898 | */ | |
899 | ||
625fcfe9 KS |
900 | static int |
901 | yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, | |
902 | yaml_event_t *event) | |
52fba2c6 KS |
903 | { |
904 | yaml_token_t *token; | |
52fba2c6 | 905 | |
625fcfe9 KS |
906 | token = PEEK_TOKEN(parser); |
907 | if (!token) return 0; | |
52fba2c6 KS |
908 | |
909 | if (token->type == YAML_VALUE_TOKEN) | |
910 | { | |
911 | yaml_mark_t mark = token->end_mark; | |
625fcfe9 KS |
912 | SKIP_TOKEN(parser); |
913 | token = PEEK_TOKEN(parser); | |
914 | if (!token) return 0; | |
52fba2c6 KS |
915 | if (token->type != YAML_KEY_TOKEN && |
916 | token->type != YAML_VALUE_TOKEN && | |
917 | token->type != YAML_BLOCK_END_TOKEN) { | |
625fcfe9 | 918 | if (!PUSH(parser, parser->states, |
52fba2c6 | 919 | YAML_PARSE_BLOCK_MAPPING_KEY_STATE)) |
625fcfe9 KS |
920 | return 0; |
921 | return yaml_parser_parse_node(parser, event, 1, 1); | |
52fba2c6 KS |
922 | } |
923 | else { | |
924 | parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; | |
625fcfe9 | 925 | return yaml_parser_process_empty_scalar(parser, event, mark); |
52fba2c6 KS |
926 | } |
927 | } | |
928 | ||
929 | else | |
930 | { | |
931 | parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; | |
625fcfe9 | 932 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); |
52fba2c6 KS |
933 | } |
934 | } | |
935 | ||
ab01bac8 KS |
936 | /* |
937 | * Parse the productions: | |
938 | * flow_sequence ::= FLOW-SEQUENCE-START | |
939 | * ******************* | |
940 | * (flow_sequence_entry FLOW-ENTRY)* | |
941 | * * ********** | |
942 | * flow_sequence_entry? | |
943 | * * | |
944 | * FLOW-SEQUENCE-END | |
945 | * ***************** | |
946 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
947 | * * | |
948 | */ | |
949 | ||
625fcfe9 KS |
950 | static int |
951 | yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, | |
952 | yaml_event_t *event, int first) | |
ab01bac8 KS |
953 | { |
954 | yaml_token_t *token; | |
c9b74def | 955 | yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ |
ab01bac8 KS |
956 | |
957 | if (first) { | |
625fcfe9 KS |
958 | token = PEEK_TOKEN(parser); |
959 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
960 | return 0; | |
961 | SKIP_TOKEN(parser); | |
ab01bac8 KS |
962 | } |
963 | ||
625fcfe9 KS |
964 | token = PEEK_TOKEN(parser); |
965 | if (!token) return 0; | |
ab01bac8 KS |
966 | |
967 | if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) | |
968 | { | |
969 | if (!first) { | |
970 | if (token->type == YAML_FLOW_ENTRY_TOKEN) { | |
625fcfe9 KS |
971 | SKIP_TOKEN(parser); |
972 | token = PEEK_TOKEN(parser); | |
973 | if (!token) return 0; | |
ab01bac8 KS |
974 | } |
975 | else { | |
625fcfe9 KS |
976 | return yaml_parser_set_parser_error_context(parser, |
977 | "while parsing a flow sequence", POP(parser, parser->marks), | |
6be8109b | 978 | "did not find expected ',' or ']'", token->start_mark); |
ab01bac8 KS |
979 | } |
980 | } | |
981 | ||
982 | if (token->type == YAML_KEY_TOKEN) { | |
ab01bac8 | 983 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE; |
625fcfe9 | 984 | MAPPING_START_EVENT_INIT(*event, NULL, NULL, |
ab01bac8 KS |
985 | 1, YAML_FLOW_MAPPING_STYLE, |
986 | token->start_mark, token->end_mark); | |
625fcfe9 KS |
987 | SKIP_TOKEN(parser); |
988 | return 1; | |
ab01bac8 KS |
989 | } |
990 | ||
991 | else if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
625fcfe9 | 992 | if (!PUSH(parser, parser->states, |
ab01bac8 | 993 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE)) |
625fcfe9 KS |
994 | return 0; |
995 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
996 | } |
997 | } | |
998 | ||
625fcfe9 | 999 | parser->state = POP(parser, parser->states); |
c9b74def | 1000 | dummy_mark = POP(parser, parser->marks); |
625fcfe9 KS |
1001 | SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); |
1002 | SKIP_TOKEN(parser); | |
1003 | return 1; | |
ab01bac8 KS |
1004 | } |
1005 | ||
1006 | /* | |
1007 | * Parse the productions: | |
1008 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1009 | * *** * | |
1010 | */ | |
52fba2c6 | 1011 | |
625fcfe9 KS |
1012 | static int |
1013 | yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, | |
1014 | yaml_event_t *event) | |
ab01bac8 KS |
1015 | { |
1016 | yaml_token_t *token; | |
ab01bac8 | 1017 | |
625fcfe9 KS |
1018 | token = PEEK_TOKEN(parser); |
1019 | if (!token) return 0; | |
ab01bac8 KS |
1020 | |
1021 | if (token->type != YAML_VALUE_TOKEN && token->type != YAML_FLOW_ENTRY_TOKEN | |
1022 | && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
625fcfe9 | 1023 | if (!PUSH(parser, parser->states, |
ab01bac8 | 1024 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE)) |
625fcfe9 KS |
1025 | return 0; |
1026 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
1027 | } |
1028 | else { | |
625fcfe9 KS |
1029 | yaml_mark_t mark = token->end_mark; |
1030 | SKIP_TOKEN(parser); | |
ab01bac8 | 1031 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE; |
625fcfe9 | 1032 | return yaml_parser_process_empty_scalar(parser, event, mark); |
ab01bac8 KS |
1033 | } |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Parse the productions: | |
1038 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1039 | * ***** * | |
1040 | */ | |
52fba2c6 | 1041 | |
625fcfe9 KS |
1042 | static int |
1043 | yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, | |
1044 | yaml_event_t *event) | |
ab01bac8 KS |
1045 | { |
1046 | yaml_token_t *token; | |
1047 | ||
625fcfe9 KS |
1048 | token = PEEK_TOKEN(parser); |
1049 | if (!token) return 0; | |
ab01bac8 KS |
1050 | |
1051 | if (token->type == YAML_VALUE_TOKEN) { | |
625fcfe9 KS |
1052 | SKIP_TOKEN(parser); |
1053 | token = PEEK_TOKEN(parser); | |
1054 | if (!token) return 0; | |
ab01bac8 KS |
1055 | if (token->type != YAML_FLOW_ENTRY_TOKEN |
1056 | && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { | |
625fcfe9 | 1057 | if (!PUSH(parser, parser->states, |
ab01bac8 | 1058 | YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE)) |
625fcfe9 KS |
1059 | return 0; |
1060 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
1061 | } |
1062 | } | |
1063 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE; | |
625fcfe9 | 1064 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); |
ab01bac8 KS |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * Parse the productions: | |
1069 | * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1070 | * * | |
1071 | */ | |
52fba2c6 | 1072 | |
625fcfe9 KS |
1073 | static int |
1074 | yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, | |
1075 | yaml_event_t *event) | |
ab01bac8 KS |
1076 | { |
1077 | yaml_token_t *token; | |
1078 | ||
625fcfe9 KS |
1079 | token = PEEK_TOKEN(parser); |
1080 | if (!token) return 0; | |
ab01bac8 KS |
1081 | |
1082 | parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE; | |
1083 | ||
625fcfe9 KS |
1084 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->start_mark); |
1085 | return 1; | |
ab01bac8 KS |
1086 | } |
1087 | ||
1088 | /* | |
1089 | * Parse the productions: | |
1090 | * flow_mapping ::= FLOW-MAPPING-START | |
1091 | * ****************** | |
1092 | * (flow_mapping_entry FLOW-ENTRY)* | |
1093 | * * ********** | |
1094 | * flow_mapping_entry? | |
1095 | * ****************** | |
1096 | * FLOW-MAPPING-END | |
1097 | * **************** | |
1098 | * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1099 | * * *** * | |
1100 | */ | |
52fba2c6 | 1101 | |
625fcfe9 KS |
1102 | static int |
1103 | yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, | |
1104 | yaml_event_t *event, int first) | |
ab01bac8 KS |
1105 | { |
1106 | yaml_token_t *token; | |
c9b74def | 1107 | yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ |
ab01bac8 KS |
1108 | |
1109 | if (first) { | |
625fcfe9 KS |
1110 | token = PEEK_TOKEN(parser); |
1111 | if (!PUSH(parser, parser->marks, token->start_mark)) | |
1112 | return 0; | |
1113 | SKIP_TOKEN(parser); | |
ab01bac8 KS |
1114 | } |
1115 | ||
625fcfe9 KS |
1116 | token = PEEK_TOKEN(parser); |
1117 | if (!token) return 0; | |
ab01bac8 KS |
1118 | |
1119 | if (token->type != YAML_FLOW_MAPPING_END_TOKEN) | |
1120 | { | |
1121 | if (!first) { | |
1122 | if (token->type == YAML_FLOW_ENTRY_TOKEN) { | |
625fcfe9 KS |
1123 | SKIP_TOKEN(parser); |
1124 | token = PEEK_TOKEN(parser); | |
1125 | if (!token) return 0; | |
ab01bac8 KS |
1126 | } |
1127 | else { | |
625fcfe9 KS |
1128 | return yaml_parser_set_parser_error_context(parser, |
1129 | "while parsing a flow mapping", POP(parser, parser->marks), | |
6be8109b | 1130 | "did not find expected ',' or '}'", token->start_mark); |
ab01bac8 KS |
1131 | } |
1132 | } | |
1133 | ||
1134 | if (token->type == YAML_KEY_TOKEN) { | |
625fcfe9 KS |
1135 | SKIP_TOKEN(parser); |
1136 | token = PEEK_TOKEN(parser); | |
1137 | if (!token) return 0; | |
ab01bac8 KS |
1138 | if (token->type != YAML_VALUE_TOKEN |
1139 | && token->type != YAML_FLOW_ENTRY_TOKEN | |
1140 | && token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
625fcfe9 | 1141 | if (!PUSH(parser, parser->states, |
ab01bac8 | 1142 | YAML_PARSE_FLOW_MAPPING_VALUE_STATE)) |
625fcfe9 KS |
1143 | return 0; |
1144 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
1145 | } |
1146 | else { | |
1147 | parser->state = YAML_PARSE_FLOW_MAPPING_VALUE_STATE; | |
625fcfe9 KS |
1148 | return yaml_parser_process_empty_scalar(parser, event, |
1149 | token->start_mark); | |
ab01bac8 KS |
1150 | } |
1151 | } | |
1152 | else if (token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
625fcfe9 | 1153 | if (!PUSH(parser, parser->states, |
ab01bac8 | 1154 | YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE)) |
625fcfe9 KS |
1155 | return 0; |
1156 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
1157 | } |
1158 | } | |
1159 | ||
625fcfe9 | 1160 | parser->state = POP(parser, parser->states); |
c9b74def | 1161 | dummy_mark = POP(parser, parser->marks); |
625fcfe9 KS |
1162 | MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); |
1163 | SKIP_TOKEN(parser); | |
1164 | return 1; | |
ab01bac8 KS |
1165 | } |
1166 | ||
1167 | /* | |
1168 | * Parse the productions: | |
1169 | * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? | |
1170 | * * ***** * | |
1171 | */ | |
52fba2c6 | 1172 | |
625fcfe9 KS |
1173 | static int |
1174 | yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, | |
1175 | yaml_event_t *event, int empty) | |
ab01bac8 KS |
1176 | { |
1177 | yaml_token_t *token; | |
ab01bac8 | 1178 | |
625fcfe9 KS |
1179 | token = PEEK_TOKEN(parser); |
1180 | if (!token) return 0; | |
ab01bac8 KS |
1181 | |
1182 | if (empty) { | |
1183 | parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; | |
625fcfe9 KS |
1184 | return yaml_parser_process_empty_scalar(parser, event, |
1185 | token->start_mark); | |
ab01bac8 KS |
1186 | } |
1187 | ||
1188 | if (token->type == YAML_VALUE_TOKEN) { | |
625fcfe9 KS |
1189 | SKIP_TOKEN(parser); |
1190 | token = PEEK_TOKEN(parser); | |
1191 | if (!token) return 0; | |
ab01bac8 KS |
1192 | if (token->type != YAML_FLOW_ENTRY_TOKEN |
1193 | && token->type != YAML_FLOW_MAPPING_END_TOKEN) { | |
625fcfe9 | 1194 | if (!PUSH(parser, parser->states, |
ab01bac8 | 1195 | YAML_PARSE_FLOW_MAPPING_KEY_STATE)) |
625fcfe9 KS |
1196 | return 0; |
1197 | return yaml_parser_parse_node(parser, event, 0, 0); | |
ab01bac8 KS |
1198 | } |
1199 | } | |
1200 | ||
1201 | parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; | |
625fcfe9 | 1202 | return yaml_parser_process_empty_scalar(parser, event, token->start_mark); |
ab01bac8 KS |
1203 | } |
1204 | ||
1205 | /* | |
1206 | * Generate an empty scalar event. | |
1207 | */ | |
1208 | ||
625fcfe9 KS |
1209 | static int |
1210 | yaml_parser_process_empty_scalar(yaml_parser_t *parser, yaml_event_t *event, | |
1211 | yaml_mark_t mark) | |
ab01bac8 | 1212 | { |
ab01bac8 KS |
1213 | yaml_char_t *value; |
1214 | ||
1215 | value = yaml_malloc(1); | |
1216 | if (!value) { | |
1217 | parser->error = YAML_MEMORY_ERROR; | |
625fcfe9 | 1218 | return 0; |
ab01bac8 KS |
1219 | } |
1220 | value[0] = '\0'; | |
1221 | ||
625fcfe9 | 1222 | SCALAR_EVENT_INIT(*event, NULL, NULL, value, 0, |
ab01bac8 | 1223 | 1, 0, YAML_PLAIN_SCALAR_STYLE, mark, mark); |
ab01bac8 | 1224 | |
625fcfe9 | 1225 | return 1; |
ab01bac8 KS |
1226 | } |
1227 | ||
1228 | /* | |
1229 | * Parse directives. | |
1230 | */ | |
1231 | ||
1232 | static int | |
625fcfe9 KS |
1233 | yaml_parser_process_directives(yaml_parser_t *parser, |
1234 | yaml_version_directive_t **version_directive_ref, | |
1235 | yaml_tag_directive_t **tag_directives_start_ref, | |
1236 | yaml_tag_directive_t **tag_directives_end_ref) | |
ab01bac8 KS |
1237 | { |
1238 | yaml_tag_directive_t default_tag_directives[] = { | |
1239 | {(yaml_char_t *)"!", (yaml_char_t *)"!"}, | |
1240 | {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"}, | |
1241 | {NULL, NULL} | |
1242 | }; | |
ab01bac8 | 1243 | yaml_tag_directive_t *default_tag_directive; |
625fcfe9 KS |
1244 | yaml_version_directive_t *version_directive = NULL; |
1245 | struct { | |
1246 | yaml_tag_directive_t *start; | |
1247 | yaml_tag_directive_t *end; | |
1248 | yaml_tag_directive_t *top; | |
1249 | } tag_directives = { NULL, NULL, NULL }; | |
ab01bac8 KS |
1250 | yaml_token_t *token; |
1251 | ||
625fcfe9 KS |
1252 | if (!STACK_INIT(parser, tag_directives, INITIAL_STACK_SIZE)) |
1253 | goto error; | |
1254 | ||
1255 | token = PEEK_TOKEN(parser); | |
1256 | if (!token) goto error; | |
ab01bac8 KS |
1257 | |
1258 | while (token->type == YAML_VERSION_DIRECTIVE_TOKEN || | |
1259 | token->type == YAML_TAG_DIRECTIVE_TOKEN) | |
1260 | { | |
1261 | if (token->type == YAML_VERSION_DIRECTIVE_TOKEN) { | |
625fcfe9 KS |
1262 | if (version_directive) { |
1263 | yaml_parser_set_parser_error(parser, | |
ab01bac8 | 1264 | "found duplicate %YAML directive", token->start_mark); |
625fcfe9 | 1265 | goto error; |
ab01bac8 KS |
1266 | } |
1267 | if (token->data.version_directive.major != 1 | |
6d167281 | 1268 | || token->data.version_directive.minor != 1) { |
625fcfe9 | 1269 | yaml_parser_set_parser_error(parser, |
ab01bac8 | 1270 | "found incompatible YAML document", token->start_mark); |
625fcfe9 | 1271 | goto error; |
ab01bac8 | 1272 | } |
625fcfe9 KS |
1273 | version_directive = yaml_malloc(sizeof(yaml_version_directive_t)); |
1274 | if (!version_directive) { | |
ab01bac8 | 1275 | parser->error = YAML_MEMORY_ERROR; |
625fcfe9 | 1276 | goto error; |
ab01bac8 | 1277 | } |
625fcfe9 KS |
1278 | version_directive->major = token->data.version_directive.major; |
1279 | version_directive->minor = token->data.version_directive.minor; | |
ab01bac8 KS |
1280 | } |
1281 | ||
1282 | else if (token->type == YAML_TAG_DIRECTIVE_TOKEN) { | |
252c575a KS |
1283 | yaml_tag_directive_t value; |
1284 | value.handle = token->data.tag_directive.handle; | |
1285 | value.prefix = token->data.tag_directive.prefix; | |
1286 | ||
625fcfe9 KS |
1287 | if (!yaml_parser_append_tag_directive(parser, value, 0, |
1288 | token->start_mark)) | |
1289 | goto error; | |
1290 | if (!PUSH(parser, tag_directives, value)) | |
1291 | goto error; | |
ab01bac8 | 1292 | } |
ab01bac8 | 1293 | |
625fcfe9 KS |
1294 | SKIP_TOKEN(parser); |
1295 | token = PEEK_TOKEN(parser); | |
1296 | if (!token) goto error; | |
1297 | } | |
986dbde7 | 1298 | |
ab01bac8 KS |
1299 | for (default_tag_directive = default_tag_directives; |
1300 | default_tag_directive->handle; default_tag_directive++) { | |
625fcfe9 KS |
1301 | if (!yaml_parser_append_tag_directive(parser, *default_tag_directive, 1, |
1302 | token->start_mark)) | |
1303 | goto error; | |
1304 | } | |
1305 | ||
1306 | if (version_directive_ref) { | |
1307 | *version_directive_ref = version_directive; | |
1308 | } | |
1309 | if (tag_directives_start_ref) { | |
1310 | if (STACK_EMPTY(parser, tag_directives)) { | |
1311 | *tag_directives_start_ref = *tag_directives_end_ref = NULL; | |
54815ffd | 1312 | STACK_DEL(parser, tag_directives); |
ab01bac8 | 1313 | } |
625fcfe9 KS |
1314 | else { |
1315 | *tag_directives_start_ref = tag_directives.start; | |
54815ffd | 1316 | *tag_directives_end_ref = tag_directives.top; |
ab01bac8 KS |
1317 | } |
1318 | } | |
54815ffd KS |
1319 | else { |
1320 | STACK_DEL(parser, tag_directives); | |
1321 | } | |
625fcfe9 | 1322 | |
ab01bac8 | 1323 | return 1; |
625fcfe9 KS |
1324 | |
1325 | error: | |
1326 | yaml_free(version_directive); | |
1327 | while (!STACK_EMPTY(parser, tag_directives)) { | |
1328 | yaml_tag_directive_t tag_directive = POP(parser, tag_directives); | |
1329 | yaml_free(tag_directive.handle); | |
1330 | yaml_free(tag_directive.prefix); | |
1331 | } | |
1332 | STACK_DEL(parser, tag_directives); | |
1333 | return 0; | |
1334 | } | |
1335 | ||
5a00d8fe KS |
1336 | /* |
1337 | * Append a tag directive to the directives stack. | |
1338 | */ | |
1339 | ||
625fcfe9 KS |
1340 | static int |
1341 | yaml_parser_append_tag_directive(yaml_parser_t *parser, | |
1342 | yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark) | |
1343 | { | |
1344 | yaml_tag_directive_t *tag_directive; | |
1345 | yaml_tag_directive_t copy = { NULL, NULL }; | |
625fcfe9 KS |
1346 | |
1347 | for (tag_directive = parser->tag_directives.start; | |
1348 | tag_directive != parser->tag_directives.top; tag_directive ++) { | |
1349 | if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) { | |
1350 | if (allow_duplicates) | |
1351 | return 1; | |
1352 | return yaml_parser_set_parser_error(parser, | |
1353 | "found duplicate %TAG directive", mark); | |
1354 | } | |
1355 | } | |
1356 | ||
cf616166 KS |
1357 | copy.handle = yaml_strdup(value.handle); |
1358 | copy.prefix = yaml_strdup(value.prefix); | |
625fcfe9 KS |
1359 | if (!copy.handle || !copy.prefix) { |
1360 | parser->error = YAML_MEMORY_ERROR; | |
1361 | goto error; | |
1362 | } | |
1363 | ||
1364 | if (!PUSH(parser, parser->tag_directives, copy)) | |
1365 | goto error; | |
1366 | ||
1367 | return 1; | |
1368 | ||
1369 | error: | |
1370 | yaml_free(copy.handle); | |
1371 | yaml_free(copy.prefix); | |
1372 | return 0; | |
ab01bac8 | 1373 | } |
52fba2c6 | 1374 |