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03be97ab KS |
1 | |
2 | /* | |
3 | * Introduction | |
4 | * ************ | |
5 | * | |
6 | * The following notes assume that you are familiar with the YAML specification | |
7 | * (http://yaml.org/spec/cvs/current.html). We mostly follow it, although in | |
8 | * some cases we are less restrictive that it requires. | |
9 | * | |
10 | * The process of transforming a YAML stream into a sequence of events is | |
11 | * divided on two steps: Scanning and Parsing. | |
12 | * | |
13 | * The Scanner transforms the input stream into a sequence of tokens, while the | |
14 | * parser transform the sequence of tokens produced by the Scanner into a | |
15 | * sequence of parsing events. | |
16 | * | |
17 | * The Scanner is rather clever and complicated. The Parser, on the contrary, | |
18 | * is a straightforward implementation of a recursive-descendant parser (or, | |
19 | * LL(1) parser, as it is usually called). | |
20 | * | |
21 | * Actually there are two issues of Scanning that might be called "clever", the | |
22 | * rest is quite straightforward. The issues are "block collection start" and | |
23 | * "simple keys". Both issues are explained below in details. | |
24 | * | |
25 | * Here the Scanning step is explained and implemented. We start with the list | |
26 | * of all the tokens produced by the Scanner together with short descriptions. | |
27 | * | |
28 | * Now, tokens: | |
29 | * | |
30 | * STREAM-START(encoding) # The stream start. | |
31 | * STREAM-END # The stream end. | |
32 | * VERSION-DIRECTIVE(major,minor) # The '%YAML' directive. | |
33 | * TAG-DIRECTIVE(handle,prefix) # The '%TAG' directive. | |
34 | * DOCUMENT-START # '---' | |
35 | * DOCUMENT-END # '...' | |
36 | * BLOCK-SEQUENCE-START # Indentation increase denoting a block | |
37 | * BLOCK-MAPPING-START # sequence or a block mapping. | |
38 | * BLOCK-END # Indentation decrease. | |
39 | * FLOW-SEQUENCE-START # '[' | |
40 | * FLOW-SEQUENCE-END # ']' | |
41 | * BLOCK-SEQUENCE-START # '{' | |
42 | * BLOCK-SEQUENCE-END # '}' | |
43 | * BLOCK-ENTRY # '-' | |
44 | * FLOW-ENTRY # ',' | |
45 | * KEY # '?' or nothing (simple keys). | |
46 | * VALUE # ':' | |
47 | * ALIAS(anchor) # '*anchor' | |
48 | * ANCHOR(anchor) # '&anchor' | |
49 | * TAG(handle,suffix) # '!handle!suffix' | |
50 | * SCALAR(value,style) # A scalar. | |
51 | * | |
52 | * The following two tokens are "virtual" tokens denoting the beginning and the | |
53 | * end of the stream: | |
54 | * | |
55 | * STREAM-START(encoding) | |
56 | * STREAM-END | |
57 | * | |
58 | * We pass the information about the input stream encoding with the | |
59 | * STREAM-START token. | |
60 | * | |
61 | * The next two tokens are responsible for tags: | |
62 | * | |
63 | * VERSION-DIRECTIVE(major,minor) | |
64 | * TAG-DIRECTIVE(handle,prefix) | |
65 | * | |
66 | * Example: | |
67 | * | |
68 | * %YAML 1.1 | |
69 | * %TAG ! !foo | |
70 | * %TAG !yaml! tag:yaml.org,2002: | |
71 | * --- | |
72 | * | |
bdf4d192 | 73 | * The corresponding sequence of tokens: |
03be97ab KS |
74 | * |
75 | * STREAM-START(utf-8) | |
76 | * VERSION-DIRECTIVE(1,1) | |
77 | * TAG-DIRECTIVE("!","!foo") | |
78 | * TAG-DIRECTIVE("!yaml","tag:yaml.org,2002:") | |
79 | * DOCUMENT-START | |
80 | * STREAM-END | |
81 | * | |
82 | * Note that the VERSION-DIRECTIVE and TAG-DIRECTIVE tokens occupy a whole | |
83 | * line. | |
84 | * | |
85 | * The document start and end indicators are represented by: | |
86 | * | |
87 | * DOCUMENT-START | |
88 | * DOCUMENT-END | |
89 | * | |
90 | * Note that if a YAML stream contains an implicit document (without '---' | |
91 | * and '...' indicators), no DOCUMENT-START and DOCUMENT-END tokens will be | |
92 | * produced. | |
93 | * | |
94 | * In the following examples, we present whole documents together with the | |
95 | * produced tokens. | |
96 | * | |
97 | * 1. An implicit document: | |
98 | * | |
99 | * 'a scalar' | |
100 | * | |
101 | * Tokens: | |
102 | * | |
103 | * STREAM-START(utf-8) | |
104 | * SCALAR("a scalar",single-quoted) | |
105 | * STREAM-END | |
106 | * | |
107 | * 2. An explicit document: | |
108 | * | |
109 | * --- | |
110 | * 'a scalar' | |
111 | * ... | |
112 | * | |
113 | * Tokens: | |
114 | * | |
115 | * STREAM-START(utf-8) | |
116 | * DOCUMENT-START | |
117 | * SCALAR("a scalar",single-quoted) | |
118 | * DOCUMENT-END | |
119 | * STREAM-END | |
120 | * | |
121 | * 3. Several documents in a stream: | |
122 | * | |
123 | * 'a scalar' | |
124 | * --- | |
125 | * 'another scalar' | |
126 | * --- | |
127 | * 'yet another scalar' | |
128 | * | |
129 | * Tokens: | |
130 | * | |
131 | * STREAM-START(utf-8) | |
132 | * SCALAR("a scalar",single-quoted) | |
133 | * DOCUMENT-START | |
134 | * SCALAR("another scalar",single-quoted) | |
135 | * DOCUMENT-START | |
136 | * SCALAR("yet another scalar",single-quoted) | |
137 | * STREAM-END | |
138 | * | |
139 | * We have already introduced the SCALAR token above. The following tokens are | |
140 | * used to describe aliases, anchors, tag, and scalars: | |
141 | * | |
142 | * ALIAS(anchor) | |
143 | * ANCHOR(anchor) | |
144 | * TAG(handle,suffix) | |
145 | * SCALAR(value,style) | |
146 | * | |
147 | * The following series of examples illustrate the usage of these tokens: | |
148 | * | |
149 | * 1. A recursive sequence: | |
150 | * | |
151 | * &A [ *A ] | |
152 | * | |
153 | * Tokens: | |
154 | * | |
155 | * STREAM-START(utf-8) | |
156 | * ANCHOR("A") | |
157 | * FLOW-SEQUENCE-START | |
158 | * ALIAS("A") | |
159 | * FLOW-SEQUENCE-END | |
160 | * STREAM-END | |
161 | * | |
162 | * 2. A tagged scalar: | |
163 | * | |
164 | * !!float "3.14" # A good approximation. | |
165 | * | |
166 | * Tokens: | |
167 | * | |
168 | * STREAM-START(utf-8) | |
169 | * TAG("!!","float") | |
170 | * SCALAR("3.14",double-quoted) | |
171 | * STREAM-END | |
172 | * | |
173 | * 3. Various scalar styles: | |
174 | * | |
175 | * --- # Implicit empty plain scalars do not produce tokens. | |
176 | * --- a plain scalar | |
177 | * --- 'a single-quoted scalar' | |
178 | * --- "a double-quoted scalar" | |
179 | * --- |- | |
180 | * a literal scalar | |
181 | * --- >- | |
182 | * a folded | |
183 | * scalar | |
184 | * | |
185 | * Tokens: | |
186 | * | |
187 | * STREAM-START(utf-8) | |
188 | * DOCUMENT-START | |
189 | * DOCUMENT-START | |
190 | * SCALAR("a plain scalar",plain) | |
191 | * DOCUMENT-START | |
192 | * SCALAR("a single-quoted scalar",single-quoted) | |
193 | * DOCUMENT-START | |
194 | * SCALAR("a double-quoted scalar",double-quoted) | |
195 | * DOCUMENT-START | |
196 | * SCALAR("a literal scalar",literal) | |
197 | * DOCUMENT-START | |
198 | * SCALAR("a folded scalar",folded) | |
199 | * STREAM-END | |
200 | * | |
201 | * Now it's time to review collection-related tokens. We will start with | |
202 | * flow collections: | |
203 | * | |
204 | * FLOW-SEQUENCE-START | |
205 | * FLOW-SEQUENCE-END | |
206 | * FLOW-MAPPING-START | |
207 | * FLOW-MAPPING-END | |
208 | * FLOW-ENTRY | |
209 | * KEY | |
210 | * VALUE | |
211 | * | |
212 | * The tokens FLOW-SEQUENCE-START, FLOW-SEQUENCE-END, FLOW-MAPPING-START, and | |
213 | * FLOW-MAPPING-END represent the indicators '[', ']', '{', and '}' | |
214 | * correspondingly. FLOW-ENTRY represent the ',' indicator. Finally the | |
215 | * indicators '?' and ':', which are used for denoting mapping keys and values, | |
216 | * are represented by the KEY and VALUE tokens. | |
217 | * | |
218 | * The following examples show flow collections: | |
219 | * | |
220 | * 1. A flow sequence: | |
221 | * | |
222 | * [item 1, item 2, item 3] | |
223 | * | |
224 | * Tokens: | |
225 | * | |
226 | * STREAM-START(utf-8) | |
227 | * FLOW-SEQUENCE-START | |
228 | * SCALAR("item 1",plain) | |
229 | * FLOW-ENTRY | |
230 | * SCALAR("item 2",plain) | |
231 | * FLOW-ENTRY | |
232 | * SCALAR("item 3",plain) | |
233 | * FLOW-SEQUENCE-END | |
234 | * STREAM-END | |
235 | * | |
236 | * 2. A flow mapping: | |
237 | * | |
238 | * { | |
239 | * a simple key: a value, # Note that the KEY token is produced. | |
240 | * ? a complex key: another value, | |
241 | * } | |
242 | * | |
243 | * Tokens: | |
244 | * | |
245 | * STREAM-START(utf-8) | |
246 | * FLOW-MAPPING-START | |
247 | * KEY | |
248 | * SCALAR("a simple key",plain) | |
249 | * VALUE | |
250 | * SCALAR("a value",plain) | |
251 | * FLOW-ENTRY | |
252 | * KEY | |
253 | * SCALAR("a complex key",plain) | |
254 | * VALUE | |
255 | * SCALAR("another value",plain) | |
256 | * FLOW-ENTRY | |
257 | * FLOW-MAPPING-END | |
258 | * STREAM-END | |
259 | * | |
260 | * A simple key is a key which is not denoted by the '?' indicator. Note that | |
261 | * the Scanner still produce the KEY token whenever it encounters a simple key. | |
262 | * | |
263 | * For scanning block collections, the following tokens are used (note that we | |
264 | * repeat KEY and VALUE here): | |
265 | * | |
266 | * BLOCK-SEQUENCE-START | |
267 | * BLOCK-MAPPING-START | |
268 | * BLOCK-END | |
269 | * BLOCK-ENTRY | |
270 | * KEY | |
271 | * VALUE | |
272 | * | |
273 | * The tokens BLOCK-SEQUENCE-START and BLOCK-MAPPING-START denote indentation | |
274 | * increase that precedes a block collection (cf. the INDENT token in Python). | |
275 | * The token BLOCK-END denote indentation decrease that ends a block collection | |
276 | * (cf. the DEDENT token in Python). However YAML has some syntax pecularities | |
277 | * that makes detections of these tokens more complex. | |
278 | * | |
279 | * The tokens BLOCK-ENTRY, KEY, and VALUE are used to represent the indicators | |
280 | * '-', '?', and ':' correspondingly. | |
281 | * | |
282 | * The following examples show how the tokens BLOCK-SEQUENCE-START, | |
283 | * BLOCK-MAPPING-START, and BLOCK-END are emitted by the Scanner: | |
284 | * | |
285 | * 1. Block sequences: | |
286 | * | |
287 | * - item 1 | |
288 | * - item 2 | |
289 | * - | |
290 | * - item 3.1 | |
291 | * - item 3.2 | |
292 | * - | |
293 | * key 1: value 1 | |
294 | * key 2: value 2 | |
295 | * | |
296 | * Tokens: | |
297 | * | |
298 | * STREAM-START(utf-8) | |
299 | * BLOCK-SEQUENCE-START | |
300 | * BLOCK-ENTRY | |
301 | * SCALAR("item 1",plain) | |
302 | * BLOCK-ENTRY | |
303 | * SCALAR("item 2",plain) | |
304 | * BLOCK-ENTRY | |
305 | * BLOCK-SEQUENCE-START | |
306 | * BLOCK-ENTRY | |
307 | * SCALAR("item 3.1",plain) | |
308 | * BLOCK-ENTRY | |
309 | * SCALAR("item 3.2",plain) | |
310 | * BLOCK-END | |
311 | * BLOCK-ENTRY | |
312 | * BLOCK-MAPPING-START | |
313 | * KEY | |
314 | * SCALAR("key 1",plain) | |
315 | * VALUE | |
316 | * SCALAR("value 1",plain) | |
317 | * KEY | |
318 | * SCALAR("key 2",plain) | |
319 | * VALUE | |
320 | * SCALAR("value 2",plain) | |
321 | * BLOCK-END | |
322 | * BLOCK-END | |
323 | * STREAM-END | |
324 | * | |
325 | * 2. Block mappings: | |
326 | * | |
327 | * a simple key: a value # The KEY token is produced here. | |
328 | * ? a complex key | |
329 | * : another value | |
330 | * a mapping: | |
331 | * key 1: value 1 | |
332 | * key 2: value 2 | |
333 | * a sequence: | |
334 | * - item 1 | |
335 | * - item 2 | |
336 | * | |
337 | * Tokens: | |
338 | * | |
339 | * STREAM-START(utf-8) | |
340 | * BLOCK-MAPPING-START | |
341 | * KEY | |
342 | * SCALAR("a simple key",plain) | |
343 | * VALUE | |
344 | * SCALAR("a value",plain) | |
345 | * KEY | |
346 | * SCALAR("a complex key",plain) | |
347 | * VALUE | |
348 | * SCALAR("another value",plain) | |
349 | * KEY | |
350 | * SCALAR("a mapping",plain) | |
351 | * BLOCK-MAPPING-START | |
352 | * KEY | |
353 | * SCALAR("key 1",plain) | |
354 | * VALUE | |
355 | * SCALAR("value 1",plain) | |
356 | * KEY | |
357 | * SCALAR("key 2",plain) | |
358 | * VALUE | |
359 | * SCALAR("value 2",plain) | |
360 | * BLOCK-END | |
361 | * KEY | |
362 | * SCALAR("a sequence",plain) | |
363 | * VALUE | |
364 | * BLOCK-SEQUENCE-START | |
365 | * BLOCK-ENTRY | |
366 | * SCALAR("item 1",plain) | |
367 | * BLOCK-ENTRY | |
368 | * SCALAR("item 2",plain) | |
369 | * BLOCK-END | |
370 | * BLOCK-END | |
371 | * STREAM-END | |
372 | * | |
373 | * YAML does not always require to start a new block collection from a new | |
374 | * line. If the current line contains only '-', '?', and ':' indicators, a new | |
375 | * block collection may start at the current line. The following examples | |
376 | * illustrate this case: | |
377 | * | |
378 | * 1. Collections in a sequence: | |
379 | * | |
380 | * - - item 1 | |
381 | * - item 2 | |
382 | * - key 1: value 1 | |
383 | * key 2: value 2 | |
384 | * - ? complex key | |
385 | * : complex value | |
386 | * | |
387 | * Tokens: | |
388 | * | |
389 | * STREAM-START(utf-8) | |
390 | * BLOCK-SEQUENCE-START | |
391 | * BLOCK-ENTRY | |
392 | * BLOCK-SEQUENCE-START | |
393 | * BLOCK-ENTRY | |
394 | * SCALAR("item 1",plain) | |
395 | * BLOCK-ENTRY | |
396 | * SCALAR("item 2",plain) | |
397 | * BLOCK-END | |
398 | * BLOCK-ENTRY | |
399 | * BLOCK-MAPPING-START | |
400 | * KEY | |
401 | * SCALAR("key 1",plain) | |
402 | * VALUE | |
403 | * SCALAR("value 1",plain) | |
404 | * KEY | |
405 | * SCALAR("key 2",plain) | |
406 | * VALUE | |
407 | * SCALAR("value 2",plain) | |
408 | * BLOCK-END | |
409 | * BLOCK-ENTRY | |
410 | * BLOCK-MAPPING-START | |
411 | * KEY | |
412 | * SCALAR("complex key") | |
413 | * VALUE | |
414 | * SCALAR("complex value") | |
415 | * BLOCK-END | |
416 | * BLOCK-END | |
417 | * STREAM-END | |
418 | * | |
419 | * 2. Collections in a mapping: | |
420 | * | |
421 | * ? a sequence | |
422 | * : - item 1 | |
423 | * - item 2 | |
424 | * ? a mapping | |
425 | * : key 1: value 1 | |
426 | * key 2: value 2 | |
427 | * | |
428 | * Tokens: | |
429 | * | |
430 | * STREAM-START(utf-8) | |
431 | * BLOCK-MAPPING-START | |
432 | * KEY | |
433 | * SCALAR("a sequence",plain) | |
434 | * VALUE | |
435 | * BLOCK-SEQUENCE-START | |
436 | * BLOCK-ENTRY | |
437 | * SCALAR("item 1",plain) | |
438 | * BLOCK-ENTRY | |
439 | * SCALAR("item 2",plain) | |
440 | * BLOCK-END | |
441 | * KEY | |
442 | * SCALAR("a mapping",plain) | |
443 | * VALUE | |
444 | * BLOCK-MAPPING-START | |
445 | * KEY | |
446 | * SCALAR("key 1",plain) | |
447 | * VALUE | |
448 | * SCALAR("value 1",plain) | |
449 | * KEY | |
450 | * SCALAR("key 2",plain) | |
451 | * VALUE | |
452 | * SCALAR("value 2",plain) | |
453 | * BLOCK-END | |
454 | * BLOCK-END | |
455 | * STREAM-END | |
456 | * | |
457 | * YAML also permits non-indented sequences if they are included into a block | |
458 | * mapping. In this case, the token BLOCK-SEQUENCE-START is not produced: | |
459 | * | |
460 | * key: | |
461 | * - item 1 # BLOCK-SEQUENCE-START is NOT produced here. | |
462 | * - item 2 | |
463 | * | |
464 | * Tokens: | |
465 | * | |
466 | * STREAM-START(utf-8) | |
467 | * BLOCK-MAPPING-START | |
468 | * KEY | |
469 | * SCALAR("key",plain) | |
470 | * VALUE | |
471 | * BLOCK-ENTRY | |
472 | * SCALAR("item 1",plain) | |
473 | * BLOCK-ENTRY | |
474 | * SCALAR("item 2",plain) | |
475 | * BLOCK-END | |
476 | */ | |
477 | ||
625fcfe9 | 478 | #include "yaml_private.h" |
03be97ab | 479 | |
f2b59d4d KS |
480 | /* |
481 | * Ensure that the buffer contains the required number of characters. | |
482 | * Return 1 on success, 0 on failure (reader error or memory error). | |
483 | */ | |
484 | ||
625fcfe9 KS |
485 | #define CACHE(parser,length) \ |
486 | (parser->unread >= (length) \ | |
487 | ? 1 \ | |
f2b59d4d KS |
488 | : yaml_parser_update_buffer(parser, (length))) |
489 | ||
eb9cceb5 KS |
490 | /* |
491 | * Advance the buffer pointer. | |
492 | */ | |
493 | ||
625fcfe9 KS |
494 | #define SKIP(parser) \ |
495 | (parser->mark.index ++, \ | |
496 | parser->mark.column ++, \ | |
497 | parser->unread --, \ | |
e35af832 | 498 | parser->buffer.pointer += WIDTH(parser->buffer)) |
e71095e3 | 499 | |
625fcfe9 | 500 | #define SKIP_LINE(parser) \ |
e35af832 | 501 | (IS_CRLF(parser->buffer) ? \ |
625fcfe9 KS |
502 | (parser->mark.index += 2, \ |
503 | parser->mark.column = 0, \ | |
504 | parser->mark.line ++, \ | |
505 | parser->unread -= 2, \ | |
506 | parser->buffer.pointer += 2) : \ | |
e35af832 | 507 | IS_BREAK(parser->buffer) ? \ |
625fcfe9 KS |
508 | (parser->mark.index ++, \ |
509 | parser->mark.column = 0, \ | |
510 | parser->mark.line ++, \ | |
511 | parser->unread --, \ | |
e35af832 | 512 | parser->buffer.pointer += WIDTH(parser->buffer)) : 0) |
e71095e3 KS |
513 | |
514 | /* | |
515 | * Copy a character to a string buffer and advance pointers. | |
516 | */ | |
517 | ||
625fcfe9 KS |
518 | #define READ(parser,string) \ |
519 | (STRING_EXTEND(parser,string) ? \ | |
e35af832 | 520 | (COPY(string,parser->buffer), \ |
625fcfe9 KS |
521 | parser->mark.index ++, \ |
522 | parser->mark.column ++, \ | |
523 | parser->unread --, \ | |
524 | 1) : 0) | |
92d41fe1 KS |
525 | |
526 | /* | |
527 | * Copy a line break character to a string buffer and advance pointers. | |
528 | */ | |
529 | ||
625fcfe9 KS |
530 | #define READ_LINE(parser,string) \ |
531 | (STRING_EXTEND(parser,string) ? \ | |
e35af832 KS |
532 | (((CHECK_AT(parser->buffer,'\r',0) \ |
533 | && CHECK_AT(parser->buffer,'\n',1)) ? /* CR LF -> LF */ \ | |
92d41fe1 | 534 | (*((string).pointer++) = (yaml_char_t) '\n', \ |
625fcfe9 KS |
535 | parser->buffer.pointer += 2, \ |
536 | parser->mark.index += 2, \ | |
537 | parser->mark.column = 0, \ | |
538 | parser->mark.line ++, \ | |
92d41fe1 | 539 | parser->unread -= 2) : \ |
e35af832 KS |
540 | (CHECK_AT(parser->buffer,'\r',0) \ |
541 | || CHECK_AT(parser->buffer,'\n',0)) ? /* CR|LF -> LF */ \ | |
92d41fe1 | 542 | (*((string).pointer++) = (yaml_char_t) '\n', \ |
625fcfe9 KS |
543 | parser->buffer.pointer ++, \ |
544 | parser->mark.index ++, \ | |
545 | parser->mark.column = 0, \ | |
546 | parser->mark.line ++, \ | |
92d41fe1 | 547 | parser->unread --) : \ |
e35af832 KS |
548 | (CHECK_AT(parser->buffer,'\xC2',0) \ |
549 | && CHECK_AT(parser->buffer,'\x85',1)) ? /* NEL -> LF */ \ | |
92d41fe1 | 550 | (*((string).pointer++) = (yaml_char_t) '\n', \ |
625fcfe9 KS |
551 | parser->buffer.pointer += 2, \ |
552 | parser->mark.index ++, \ | |
553 | parser->mark.column = 0, \ | |
554 | parser->mark.line ++, \ | |
92d41fe1 | 555 | parser->unread --) : \ |
e35af832 KS |
556 | (CHECK_AT(parser->buffer,'\xE2',0) && \ |
557 | CHECK_AT(parser->buffer,'\x80',1) && \ | |
558 | (CHECK_AT(parser->buffer,'\xA8',2) || \ | |
559 | CHECK_AT(parser->buffer,'\xA9',2))) ? /* LS|PS -> LS|PS */ \ | |
625fcfe9 KS |
560 | (*((string).pointer++) = *(parser->buffer.pointer++), \ |
561 | *((string).pointer++) = *(parser->buffer.pointer++), \ | |
562 | *((string).pointer++) = *(parser->buffer.pointer++), \ | |
563 | parser->mark.index ++, \ | |
564 | parser->mark.column = 0, \ | |
565 | parser->mark.line ++, \ | |
566 | parser->unread --) : 0), \ | |
567 | 1) : 0) | |
92d41fe1 | 568 | |
625fcfe9 KS |
569 | /* |
570 | * Public API declarations. | |
571 | */ | |
e71095e3 | 572 | |
625fcfe9 KS |
573 | YAML_DECLARE(int) |
574 | yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token); | |
92d41fe1 | 575 | |
625fcfe9 KS |
576 | /* |
577 | * Error handling. | |
578 | */ | |
92d41fe1 | 579 | |
e71095e3 | 580 | static int |
625fcfe9 KS |
581 | yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context, |
582 | yaml_mark_t context_mark, const char *problem); | |
e71095e3 | 583 | |
03be97ab KS |
584 | /* |
585 | * High-level token API. | |
586 | */ | |
587 | ||
625fcfe9 | 588 | YAML_DECLARE(int) |
03be97ab KS |
589 | yaml_parser_fetch_more_tokens(yaml_parser_t *parser); |
590 | ||
591 | static int | |
592 | yaml_parser_fetch_next_token(yaml_parser_t *parser); | |
593 | ||
594 | /* | |
595 | * Potential simple keys. | |
596 | */ | |
597 | ||
598 | static int | |
599 | yaml_parser_stale_simple_keys(yaml_parser_t *parser); | |
600 | ||
601 | static int | |
602 | yaml_parser_save_simple_key(yaml_parser_t *parser); | |
603 | ||
604 | static int | |
605 | yaml_parser_remove_simple_key(yaml_parser_t *parser); | |
606 | ||
eb9cceb5 KS |
607 | static int |
608 | yaml_parser_increase_flow_level(yaml_parser_t *parser); | |
609 | ||
610 | static int | |
611 | yaml_parser_decrease_flow_level(yaml_parser_t *parser); | |
612 | ||
03be97ab KS |
613 | /* |
614 | * Indentation treatment. | |
615 | */ | |
616 | ||
617 | static int | |
c201bf64 KS |
618 | yaml_parser_roll_indent(yaml_parser_t *parser, ptrdiff_t column, |
619 | ptrdiff_t number, yaml_token_type_t type, yaml_mark_t mark); | |
03be97ab KS |
620 | |
621 | static int | |
c201bf64 | 622 | yaml_parser_unroll_indent(yaml_parser_t *parser, ptrdiff_t column); |
03be97ab KS |
623 | |
624 | /* | |
625 | * Token fetchers. | |
626 | */ | |
627 | ||
628 | static int | |
629 | yaml_parser_fetch_stream_start(yaml_parser_t *parser); | |
630 | ||
631 | static int | |
632 | yaml_parser_fetch_stream_end(yaml_parser_t *parser); | |
633 | ||
634 | static int | |
635 | yaml_parser_fetch_directive(yaml_parser_t *parser); | |
636 | ||
03be97ab KS |
637 | static int |
638 | yaml_parser_fetch_document_indicator(yaml_parser_t *parser, | |
639 | yaml_token_type_t type); | |
640 | ||
03be97ab KS |
641 | static int |
642 | yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser, | |
643 | yaml_token_type_t type); | |
644 | ||
03be97ab KS |
645 | static int |
646 | yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser, | |
647 | yaml_token_type_t type); | |
648 | ||
649 | static int | |
650 | yaml_parser_fetch_flow_entry(yaml_parser_t *parser); | |
651 | ||
652 | static int | |
653 | yaml_parser_fetch_block_entry(yaml_parser_t *parser); | |
654 | ||
655 | static int | |
656 | yaml_parser_fetch_key(yaml_parser_t *parser); | |
657 | ||
658 | static int | |
659 | yaml_parser_fetch_value(yaml_parser_t *parser); | |
660 | ||
661 | static int | |
eb9cceb5 | 662 | yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type); |
03be97ab KS |
663 | |
664 | static int | |
665 | yaml_parser_fetch_tag(yaml_parser_t *parser); | |
666 | ||
03be97ab KS |
667 | static int |
668 | yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal); | |
669 | ||
03be97ab KS |
670 | static int |
671 | yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single); | |
672 | ||
673 | static int | |
674 | yaml_parser_fetch_plain_scalar(yaml_parser_t *parser); | |
675 | ||
676 | /* | |
677 | * Token scanners. | |
678 | */ | |
679 | ||
680 | static int | |
681 | yaml_parser_scan_to_next_token(yaml_parser_t *parser); | |
682 | ||
625fcfe9 KS |
683 | static int |
684 | yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token); | |
03be97ab KS |
685 | |
686 | static int | |
687 | yaml_parser_scan_directive_name(yaml_parser_t *parser, | |
688 | yaml_mark_t start_mark, yaml_char_t **name); | |
689 | ||
690 | static int | |
e71095e3 | 691 | yaml_parser_scan_version_directive_value(yaml_parser_t *parser, |
03be97ab KS |
692 | yaml_mark_t start_mark, int *major, int *minor); |
693 | ||
694 | static int | |
e71095e3 | 695 | yaml_parser_scan_version_directive_number(yaml_parser_t *parser, |
03be97ab KS |
696 | yaml_mark_t start_mark, int *number); |
697 | ||
698 | static int | |
699 | yaml_parser_scan_tag_directive_value(yaml_parser_t *parser, | |
e71095e3 | 700 | yaml_mark_t mark, yaml_char_t **handle, yaml_char_t **prefix); |
03be97ab | 701 | |
625fcfe9 KS |
702 | static int |
703 | yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token, | |
03be97ab KS |
704 | yaml_token_type_t type); |
705 | ||
625fcfe9 KS |
706 | static int |
707 | yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token); | |
03be97ab KS |
708 | |
709 | static int | |
710 | yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive, | |
711 | yaml_mark_t start_mark, yaml_char_t **handle); | |
712 | ||
713 | static int | |
714 | yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive, | |
e71095e3 KS |
715 | yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri); |
716 | ||
717 | static int | |
718 | yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive, | |
719 | yaml_mark_t start_mark, yaml_string_t *string); | |
03be97ab | 720 | |
625fcfe9 KS |
721 | static int |
722 | yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token, | |
723 | int literal); | |
03be97ab | 724 | |
92d41fe1 KS |
725 | static int |
726 | yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser, | |
727 | int *indent, yaml_string_t *breaks, | |
728 | yaml_mark_t start_mark, yaml_mark_t *end_mark); | |
729 | ||
625fcfe9 KS |
730 | static int |
731 | yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token, | |
732 | int single); | |
03be97ab | 733 | |
625fcfe9 KS |
734 | static int |
735 | yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token); | |
03be97ab | 736 | |
f2b59d4d | 737 | /* |
625fcfe9 | 738 | * Get the next token. |
f2b59d4d KS |
739 | */ |
740 | ||
625fcfe9 KS |
741 | YAML_DECLARE(int) |
742 | yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token) | |
f2b59d4d | 743 | { |
f2b59d4d | 744 | assert(parser); /* Non-NULL parser object is expected. */ |
625fcfe9 | 745 | assert(token); /* Non-NULL token object is expected. */ |
f2b59d4d | 746 | |
5a00d8fe KS |
747 | /* Erase the token object. */ |
748 | ||
749 | memset(token, 0, sizeof(yaml_token_t)); | |
750 | ||
625fcfe9 | 751 | /* No tokens after STREAM-END or error. */ |
f2b59d4d | 752 | |
625fcfe9 | 753 | if (parser->stream_end_produced || parser->error) { |
625fcfe9 | 754 | return 1; |
7e32c194 KS |
755 | } |
756 | ||
f2b59d4d KS |
757 | /* Ensure that the tokens queue contains enough tokens. */ |
758 | ||
625fcfe9 KS |
759 | if (!parser->token_available) { |
760 | if (!yaml_parser_fetch_more_tokens(parser)) | |
761 | return 0; | |
92d41fe1 KS |
762 | } |
763 | ||
625fcfe9 KS |
764 | /* Fetch the next token from the queue. */ |
765 | ||
766 | *token = DEQUEUE(parser, parser->tokens); | |
767 | parser->token_available = 0; | |
768 | parser->tokens_parsed ++; | |
e71095e3 | 769 | |
625fcfe9 KS |
770 | if (token->type == YAML_STREAM_END_TOKEN) { |
771 | parser->stream_end_produced = 1; | |
e71095e3 KS |
772 | } |
773 | ||
e71095e3 KS |
774 | return 1; |
775 | } | |
776 | ||
f2b59d4d KS |
777 | /* |
778 | * Set the scanner error and return 0. | |
779 | */ | |
780 | ||
781 | static int | |
782 | yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context, | |
783 | yaml_mark_t context_mark, const char *problem) | |
784 | { | |
785 | parser->error = YAML_SCANNER_ERROR; | |
786 | parser->context = context; | |
787 | parser->context_mark = context_mark; | |
788 | parser->problem = problem; | |
625fcfe9 | 789 | parser->problem_mark = parser->mark; |
7e32c194 KS |
790 | |
791 | return 0; | |
f2b59d4d KS |
792 | } |
793 | ||
f2b59d4d KS |
794 | /* |
795 | * Ensure that the tokens queue contains at least one token which can be | |
796 | * returned to the Parser. | |
797 | */ | |
798 | ||
625fcfe9 | 799 | YAML_DECLARE(int) |
f2b59d4d KS |
800 | yaml_parser_fetch_more_tokens(yaml_parser_t *parser) |
801 | { | |
802 | int need_more_tokens; | |
f2b59d4d KS |
803 | |
804 | /* While we need more tokens to fetch, do it. */ | |
805 | ||
806 | while (1) | |
807 | { | |
808 | /* | |
809 | * Check if we really need to fetch more tokens. | |
810 | */ | |
811 | ||
812 | need_more_tokens = 0; | |
813 | ||
625fcfe9 | 814 | if (parser->tokens.head == parser->tokens.tail) |
f2b59d4d KS |
815 | { |
816 | /* Queue is empty. */ | |
817 | ||
818 | need_more_tokens = 1; | |
819 | } | |
820 | else | |
821 | { | |
625fcfe9 KS |
822 | yaml_simple_key_t *simple_key; |
823 | ||
f2b59d4d KS |
824 | /* Check if any potential simple key may occupy the head position. */ |
825 | ||
7e32c194 KS |
826 | if (!yaml_parser_stale_simple_keys(parser)) |
827 | return 0; | |
828 | ||
625fcfe9 KS |
829 | for (simple_key = parser->simple_keys.start; |
830 | simple_key != parser->simple_keys.top; simple_key++) { | |
831 | if (simple_key->possible | |
832 | && simple_key->token_number == parser->tokens_parsed) { | |
f2b59d4d KS |
833 | need_more_tokens = 1; |
834 | break; | |
835 | } | |
836 | } | |
837 | } | |
838 | ||
839 | /* We are finished. */ | |
840 | ||
841 | if (!need_more_tokens) | |
842 | break; | |
843 | ||
844 | /* Fetch the next token. */ | |
845 | ||
846 | if (!yaml_parser_fetch_next_token(parser)) | |
847 | return 0; | |
848 | } | |
849 | ||
625fcfe9 KS |
850 | parser->token_available = 1; |
851 | ||
f2b59d4d KS |
852 | return 1; |
853 | } | |
854 | ||
855 | /* | |
856 | * The dispatcher for token fetchers. | |
857 | */ | |
858 | ||
859 | static int | |
860 | yaml_parser_fetch_next_token(yaml_parser_t *parser) | |
861 | { | |
862 | /* Ensure that the buffer is initialized. */ | |
863 | ||
625fcfe9 | 864 | if (!CACHE(parser, 1)) |
f2b59d4d KS |
865 | return 0; |
866 | ||
867 | /* Check if we just started scanning. Fetch STREAM-START then. */ | |
868 | ||
869 | if (!parser->stream_start_produced) | |
870 | return yaml_parser_fetch_stream_start(parser); | |
871 | ||
872 | /* Eat whitespaces and comments until we reach the next token. */ | |
873 | ||
874 | if (!yaml_parser_scan_to_next_token(parser)) | |
875 | return 0; | |
876 | ||
7e32c194 KS |
877 | /* Remove obsolete potential simple keys. */ |
878 | ||
879 | if (!yaml_parser_stale_simple_keys(parser)) | |
880 | return 0; | |
881 | ||
f2b59d4d KS |
882 | /* Check the indentation level against the current column. */ |
883 | ||
625fcfe9 | 884 | if (!yaml_parser_unroll_indent(parser, parser->mark.column)) |
f2b59d4d KS |
885 | return 0; |
886 | ||
887 | /* | |
888 | * Ensure that the buffer contains at least 4 characters. 4 is the length | |
889 | * of the longest indicators ('--- ' and '... '). | |
890 | */ | |
891 | ||
625fcfe9 | 892 | if (!CACHE(parser, 4)) |
f2b59d4d KS |
893 | return 0; |
894 | ||
895 | /* Is it the end of the stream? */ | |
896 | ||
e35af832 | 897 | if (IS_Z(parser->buffer)) |
f2b59d4d KS |
898 | return yaml_parser_fetch_stream_end(parser); |
899 | ||
900 | /* Is it a directive? */ | |
901 | ||
e35af832 | 902 | if (parser->mark.column == 0 && CHECK(parser->buffer, '%')) |
f2b59d4d KS |
903 | return yaml_parser_fetch_directive(parser); |
904 | ||
905 | /* Is it the document start indicator? */ | |
906 | ||
625fcfe9 | 907 | if (parser->mark.column == 0 |
e35af832 KS |
908 | && CHECK_AT(parser->buffer, '-', 0) |
909 | && CHECK_AT(parser->buffer, '-', 1) | |
910 | && CHECK_AT(parser->buffer, '-', 2) | |
911 | && IS_BLANKZ_AT(parser->buffer, 3)) | |
eb9cceb5 KS |
912 | return yaml_parser_fetch_document_indicator(parser, |
913 | YAML_DOCUMENT_START_TOKEN); | |
f2b59d4d KS |
914 | |
915 | /* Is it the document end indicator? */ | |
916 | ||
625fcfe9 | 917 | if (parser->mark.column == 0 |
e35af832 KS |
918 | && CHECK_AT(parser->buffer, '.', 0) |
919 | && CHECK_AT(parser->buffer, '.', 1) | |
920 | && CHECK_AT(parser->buffer, '.', 2) | |
921 | && IS_BLANKZ_AT(parser->buffer, 3)) | |
eb9cceb5 KS |
922 | return yaml_parser_fetch_document_indicator(parser, |
923 | YAML_DOCUMENT_END_TOKEN); | |
f2b59d4d KS |
924 | |
925 | /* Is it the flow sequence start indicator? */ | |
926 | ||
e35af832 | 927 | if (CHECK(parser->buffer, '[')) |
eb9cceb5 KS |
928 | return yaml_parser_fetch_flow_collection_start(parser, |
929 | YAML_FLOW_SEQUENCE_START_TOKEN); | |
f2b59d4d KS |
930 | |
931 | /* Is it the flow mapping start indicator? */ | |
932 | ||
e35af832 | 933 | if (CHECK(parser->buffer, '{')) |
eb9cceb5 KS |
934 | return yaml_parser_fetch_flow_collection_start(parser, |
935 | YAML_FLOW_MAPPING_START_TOKEN); | |
f2b59d4d KS |
936 | |
937 | /* Is it the flow sequence end indicator? */ | |
938 | ||
e35af832 | 939 | if (CHECK(parser->buffer, ']')) |
eb9cceb5 KS |
940 | return yaml_parser_fetch_flow_collection_end(parser, |
941 | YAML_FLOW_SEQUENCE_END_TOKEN); | |
f2b59d4d KS |
942 | |
943 | /* Is it the flow mapping end indicator? */ | |
944 | ||
e35af832 | 945 | if (CHECK(parser->buffer, '}')) |
eb9cceb5 KS |
946 | return yaml_parser_fetch_flow_collection_end(parser, |
947 | YAML_FLOW_MAPPING_END_TOKEN); | |
f2b59d4d KS |
948 | |
949 | /* Is it the flow entry indicator? */ | |
950 | ||
e35af832 | 951 | if (CHECK(parser->buffer, ',')) |
f2b59d4d KS |
952 | return yaml_parser_fetch_flow_entry(parser); |
953 | ||
954 | /* Is it the block entry indicator? */ | |
955 | ||
e35af832 | 956 | if (CHECK(parser->buffer, '-') && IS_BLANKZ_AT(parser->buffer, 1)) |
f2b59d4d KS |
957 | return yaml_parser_fetch_block_entry(parser); |
958 | ||
959 | /* Is it the key indicator? */ | |
960 | ||
e35af832 KS |
961 | if (CHECK(parser->buffer, '?') |
962 | && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1))) | |
f2b59d4d KS |
963 | return yaml_parser_fetch_key(parser); |
964 | ||
965 | /* Is it the value indicator? */ | |
966 | ||
e35af832 KS |
967 | if (CHECK(parser->buffer, ':') |
968 | && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1))) | |
f2b59d4d KS |
969 | return yaml_parser_fetch_value(parser); |
970 | ||
971 | /* Is it an alias? */ | |
972 | ||
e35af832 | 973 | if (CHECK(parser->buffer, '*')) |
eb9cceb5 | 974 | return yaml_parser_fetch_anchor(parser, YAML_ALIAS_TOKEN); |
f2b59d4d KS |
975 | |
976 | /* Is it an anchor? */ | |
977 | ||
e35af832 | 978 | if (CHECK(parser->buffer, '&')) |
eb9cceb5 | 979 | return yaml_parser_fetch_anchor(parser, YAML_ANCHOR_TOKEN); |
f2b59d4d KS |
980 | |
981 | /* Is it a tag? */ | |
982 | ||
e35af832 | 983 | if (CHECK(parser->buffer, '!')) |
f2b59d4d KS |
984 | return yaml_parser_fetch_tag(parser); |
985 | ||
986 | /* Is it a literal scalar? */ | |
987 | ||
e35af832 | 988 | if (CHECK(parser->buffer, '|') && !parser->flow_level) |
f2b59d4d KS |
989 | return yaml_parser_fetch_block_scalar(parser, 1); |
990 | ||
991 | /* Is it a folded scalar? */ | |
992 | ||
e35af832 | 993 | if (CHECK(parser->buffer, '>') && !parser->flow_level) |
f2b59d4d KS |
994 | return yaml_parser_fetch_block_scalar(parser, 0); |
995 | ||
996 | /* Is it a single-quoted scalar? */ | |
997 | ||
e35af832 | 998 | if (CHECK(parser->buffer, '\'')) |
f2b59d4d KS |
999 | return yaml_parser_fetch_flow_scalar(parser, 1); |
1000 | ||
1001 | /* Is it a double-quoted scalar? */ | |
1002 | ||
e35af832 | 1003 | if (CHECK(parser->buffer, '"')) |
f2b59d4d KS |
1004 | return yaml_parser_fetch_flow_scalar(parser, 0); |
1005 | ||
1006 | /* | |
1007 | * Is it a plain scalar? | |
1008 | * | |
1009 | * A plain scalar may start with any non-blank characters except | |
1010 | * | |
1011 | * '-', '?', ':', ',', '[', ']', '{', '}', | |
1012 | * '#', '&', '*', '!', '|', '>', '\'', '\"', | |
1013 | * '%', '@', '`'. | |
1014 | * | |
7e32c194 KS |
1015 | * In the block context (and, for the '-' indicator, in the flow context |
1016 | * too), it may also start with the characters | |
f2b59d4d KS |
1017 | * |
1018 | * '-', '?', ':' | |
1019 | * | |
1020 | * if it is followed by a non-space character. | |
1021 | * | |
1022 | * The last rule is more restrictive than the specification requires. | |
1023 | */ | |
1024 | ||
e35af832 KS |
1025 | if (!(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '-') |
1026 | || CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':') | |
1027 | || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '[') | |
1028 | || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{') | |
1029 | || CHECK(parser->buffer, '}') || CHECK(parser->buffer, '#') | |
1030 | || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '*') | |
1031 | || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '|') | |
1032 | || CHECK(parser->buffer, '>') || CHECK(parser->buffer, '\'') | |
1033 | || CHECK(parser->buffer, '"') || CHECK(parser->buffer, '%') | |
1034 | || CHECK(parser->buffer, '@') || CHECK(parser->buffer, '`')) || | |
1035 | (CHECK(parser->buffer, '-') && !IS_BLANK_AT(parser->buffer, 1)) || | |
f2b59d4d | 1036 | (!parser->flow_level && |
e35af832 KS |
1037 | (CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':')) |
1038 | && !IS_BLANKZ_AT(parser->buffer, 1))) | |
f2b59d4d KS |
1039 | return yaml_parser_fetch_plain_scalar(parser); |
1040 | ||
1041 | /* | |
1042 | * If we don't determine the token type so far, it is an error. | |
1043 | */ | |
1044 | ||
625fcfe9 KS |
1045 | return yaml_parser_set_scanner_error(parser, |
1046 | "while scanning for the next token", parser->mark, | |
1047 | "found character that cannot start any token"); | |
f2b59d4d KS |
1048 | } |
1049 | ||
eb9cceb5 KS |
1050 | /* |
1051 | * Check the list of potential simple keys and remove the positions that | |
1052 | * cannot contain simple keys anymore. | |
1053 | */ | |
1054 | ||
1055 | static int | |
1056 | yaml_parser_stale_simple_keys(yaml_parser_t *parser) | |
1057 | { | |
625fcfe9 | 1058 | yaml_simple_key_t *simple_key; |
eb9cceb5 KS |
1059 | |
1060 | /* Check for a potential simple key for each flow level. */ | |
1061 | ||
625fcfe9 KS |
1062 | for (simple_key = parser->simple_keys.start; |
1063 | simple_key != parser->simple_keys.top; simple_key ++) | |
eb9cceb5 | 1064 | { |
eb9cceb5 KS |
1065 | /* |
1066 | * The specification requires that a simple key | |
1067 | * | |
1068 | * - is limited to a single line, | |
1069 | * - is shorter than 1024 characters. | |
1070 | */ | |
1071 | ||
625fcfe9 KS |
1072 | if (simple_key->possible |
1073 | && (simple_key->mark.line < parser->mark.line | |
1074 | || simple_key->mark.index+1024 < parser->mark.index)) { | |
eb9cceb5 KS |
1075 | |
1076 | /* Check if the potential simple key to be removed is required. */ | |
1077 | ||
1078 | if (simple_key->required) { | |
1079 | return yaml_parser_set_scanner_error(parser, | |
1080 | "while scanning a simple key", simple_key->mark, | |
6be8109b | 1081 | "could not find expected ':'"); |
eb9cceb5 KS |
1082 | } |
1083 | ||
625fcfe9 | 1084 | simple_key->possible = 0; |
eb9cceb5 KS |
1085 | } |
1086 | } | |
1087 | ||
1088 | return 1; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Check if a simple key may start at the current position and add it if | |
1093 | * needed. | |
1094 | */ | |
1095 | ||
1096 | static int | |
1097 | yaml_parser_save_simple_key(yaml_parser_t *parser) | |
1098 | { | |
1099 | /* | |
1100 | * A simple key is required at the current position if the scanner is in | |
1101 | * the block context and the current column coincides with the indentation | |
1102 | * level. | |
1103 | */ | |
1104 | ||
625fcfe9 | 1105 | int required = (!parser->flow_level |
c201bf64 | 1106 | && parser->indent == (ptrdiff_t)parser->mark.column); |
eb9cceb5 | 1107 | |
eb9cceb5 KS |
1108 | /* |
1109 | * If the current position may start a simple key, save it. | |
1110 | */ | |
1111 | ||
1112 | if (parser->simple_key_allowed) | |
1113 | { | |
252c575a KS |
1114 | yaml_simple_key_t simple_key; |
1115 | simple_key.possible = 1; | |
1116 | simple_key.required = required; | |
1117 | simple_key.token_number = | |
3b160b60 | 1118 | parser->tokens_parsed + (parser->tokens.tail - parser->tokens.head); |
0174ed6e | 1119 | simple_key.mark = parser->mark; |
eb9cceb5 KS |
1120 | |
1121 | if (!yaml_parser_remove_simple_key(parser)) return 0; | |
1122 | ||
625fcfe9 | 1123 | *(parser->simple_keys.top-1) = simple_key; |
eb9cceb5 KS |
1124 | } |
1125 | ||
1126 | return 1; | |
1127 | } | |
1128 | ||
1129 | /* | |
1130 | * Remove a potential simple key at the current flow level. | |
1131 | */ | |
1132 | ||
1133 | static int | |
1134 | yaml_parser_remove_simple_key(yaml_parser_t *parser) | |
1135 | { | |
625fcfe9 | 1136 | yaml_simple_key_t *simple_key = parser->simple_keys.top-1; |
eb9cceb5 | 1137 | |
625fcfe9 | 1138 | if (simple_key->possible) |
eb9cceb5 KS |
1139 | { |
1140 | /* If the key is required, it is an error. */ | |
1141 | ||
1142 | if (simple_key->required) { | |
1143 | return yaml_parser_set_scanner_error(parser, | |
1144 | "while scanning a simple key", simple_key->mark, | |
6be8109b | 1145 | "could not find expected ':'"); |
eb9cceb5 | 1146 | } |
625fcfe9 | 1147 | } |
eb9cceb5 | 1148 | |
625fcfe9 | 1149 | /* Remove the key from the stack. */ |
eb9cceb5 | 1150 | |
625fcfe9 | 1151 | simple_key->possible = 0; |
eb9cceb5 KS |
1152 | |
1153 | return 1; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * Increase the flow level and resize the simple key list if needed. | |
1158 | */ | |
1159 | ||
1160 | static int | |
1161 | yaml_parser_increase_flow_level(yaml_parser_t *parser) | |
1162 | { | |
625fcfe9 | 1163 | yaml_simple_key_t empty_simple_key = { 0, 0, 0, { 0, 0, 0 } }; |
eb9cceb5 | 1164 | |
625fcfe9 | 1165 | /* Reset the simple key on the next level. */ |
eb9cceb5 | 1166 | |
625fcfe9 KS |
1167 | if (!PUSH(parser, parser->simple_keys, empty_simple_key)) |
1168 | return 0; | |
1169 | ||
1170 | /* Increase the flow level. */ | |
eb9cceb5 | 1171 | |
1ef11717 KS |
1172 | if (parser->flow_level == INT_MAX) { |
1173 | parser->error = YAML_MEMORY_ERROR; | |
c201bf64 | 1174 | return 0; |
1ef11717 | 1175 | } |
c201bf64 | 1176 | |
625fcfe9 | 1177 | parser->flow_level++; |
eb9cceb5 KS |
1178 | |
1179 | return 1; | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * Decrease the flow level. | |
1184 | */ | |
1185 | ||
1186 | static int | |
1187 | yaml_parser_decrease_flow_level(yaml_parser_t *parser) | |
1188 | { | |
c9b74def KS |
1189 | yaml_simple_key_t dummy_key; /* Used to eliminate a compiler warning. */ |
1190 | ||
625fcfe9 KS |
1191 | if (parser->flow_level) { |
1192 | parser->flow_level --; | |
c9b74def | 1193 | dummy_key = POP(parser, parser->simple_keys); |
eb9cceb5 KS |
1194 | } |
1195 | ||
eb9cceb5 KS |
1196 | return 1; |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Push the current indentation level to the stack and set the new level | |
1201 | * the current column is greater than the indentation level. In this case, | |
1202 | * append or insert the specified token into the token queue. | |
1203 | * | |
1204 | */ | |
1205 | ||
1206 | static int | |
c201bf64 KS |
1207 | yaml_parser_roll_indent(yaml_parser_t *parser, ptrdiff_t column, |
1208 | ptrdiff_t number, yaml_token_type_t type, yaml_mark_t mark) | |
eb9cceb5 | 1209 | { |
625fcfe9 | 1210 | yaml_token_t token; |
eb9cceb5 KS |
1211 | |
1212 | /* In the flow context, do nothing. */ | |
1213 | ||
1214 | if (parser->flow_level) | |
1215 | return 1; | |
1216 | ||
1217 | if (parser->indent < column) | |
1218 | { | |
eb9cceb5 KS |
1219 | /* |
1220 | * Push the current indentation level to the stack and set the new | |
1221 | * indentation level. | |
1222 | */ | |
1223 | ||
625fcfe9 KS |
1224 | if (!PUSH(parser, parser->indents, parser->indent)) |
1225 | return 0; | |
1226 | ||
1ef11717 KS |
1227 | if (column > INT_MAX) { |
1228 | parser->error = YAML_MEMORY_ERROR; | |
c201bf64 | 1229 | return 0; |
1ef11717 | 1230 | } |
c201bf64 | 1231 | |
eb9cceb5 KS |
1232 | parser->indent = column; |
1233 | ||
625fcfe9 | 1234 | /* Create a token and insert it into the queue. */ |
eb9cceb5 | 1235 | |
625fcfe9 | 1236 | TOKEN_INIT(token, type, mark, mark); |
eb9cceb5 | 1237 | |
625fcfe9 KS |
1238 | if (number == -1) { |
1239 | if (!ENQUEUE(parser, parser->tokens, token)) | |
1240 | return 0; | |
1241 | } | |
1242 | else { | |
1243 | if (!QUEUE_INSERT(parser, | |
1244 | parser->tokens, number - parser->tokens_parsed, token)) | |
1245 | return 0; | |
eb9cceb5 KS |
1246 | } |
1247 | } | |
1248 | ||
1249 | return 1; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Pop indentation levels from the indents stack until the current level | |
bdf4d192 | 1254 | * becomes less or equal to the column. For each indentation level, append |
eb9cceb5 KS |
1255 | * the BLOCK-END token. |
1256 | */ | |
1257 | ||
1258 | ||
1259 | static int | |
c201bf64 | 1260 | yaml_parser_unroll_indent(yaml_parser_t *parser, ptrdiff_t column) |
eb9cceb5 | 1261 | { |
625fcfe9 | 1262 | yaml_token_t token; |
eb9cceb5 KS |
1263 | |
1264 | /* In the flow context, do nothing. */ | |
1265 | ||
1266 | if (parser->flow_level) | |
1267 | return 1; | |
1268 | ||
bdf4d192 | 1269 | /* Loop through the indentation levels in the stack. */ |
eb9cceb5 KS |
1270 | |
1271 | while (parser->indent > column) | |
1272 | { | |
625fcfe9 | 1273 | /* Create a token and append it to the queue. */ |
eb9cceb5 | 1274 | |
625fcfe9 | 1275 | TOKEN_INIT(token, YAML_BLOCK_END_TOKEN, parser->mark, parser->mark); |
eb9cceb5 | 1276 | |
625fcfe9 | 1277 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1278 | return 0; |
eb9cceb5 KS |
1279 | |
1280 | /* Pop the indentation level. */ | |
1281 | ||
625fcfe9 | 1282 | parser->indent = POP(parser, parser->indents); |
eb9cceb5 KS |
1283 | } |
1284 | ||
1285 | return 1; | |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * Initialize the scanner and produce the STREAM-START token. | |
1290 | */ | |
1291 | ||
1292 | static int | |
1293 | yaml_parser_fetch_stream_start(yaml_parser_t *parser) | |
1294 | { | |
625fcfe9 KS |
1295 | yaml_simple_key_t simple_key = { 0, 0, 0, { 0, 0, 0 } }; |
1296 | yaml_token_t token; | |
eb9cceb5 KS |
1297 | |
1298 | /* Set the initial indentation. */ | |
1299 | ||
1300 | parser->indent = -1; | |
1301 | ||
625fcfe9 KS |
1302 | /* Initialize the simple key stack. */ |
1303 | ||
1304 | if (!PUSH(parser, parser->simple_keys, simple_key)) | |
1305 | return 0; | |
1306 | ||
eb9cceb5 KS |
1307 | /* A simple key is allowed at the beginning of the stream. */ |
1308 | ||
1309 | parser->simple_key_allowed = 1; | |
1310 | ||
1311 | /* We have started. */ | |
1312 | ||
1313 | parser->stream_start_produced = 1; | |
1314 | ||
625fcfe9 | 1315 | /* Create the STREAM-START token and append it to the queue. */ |
eb9cceb5 | 1316 | |
625fcfe9 KS |
1317 | STREAM_START_TOKEN_INIT(token, parser->encoding, |
1318 | parser->mark, parser->mark); | |
eb9cceb5 | 1319 | |
625fcfe9 | 1320 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1321 | return 0; |
eb9cceb5 KS |
1322 | |
1323 | return 1; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Produce the STREAM-END token and shut down the scanner. | |
1328 | */ | |
1329 | ||
1330 | static int | |
1331 | yaml_parser_fetch_stream_end(yaml_parser_t *parser) | |
1332 | { | |
625fcfe9 | 1333 | yaml_token_t token; |
eb9cceb5 | 1334 | |
c83b67a6 KS |
1335 | /* Force new line. */ |
1336 | ||
1337 | if (parser->mark.column != 0) { | |
1338 | parser->mark.column = 0; | |
1339 | parser->mark.line ++; | |
1340 | } | |
1341 | ||
eb9cceb5 KS |
1342 | /* Reset the indentation level. */ |
1343 | ||
1344 | if (!yaml_parser_unroll_indent(parser, -1)) | |
1345 | return 0; | |
1346 | ||
7e32c194 | 1347 | /* Reset simple keys. */ |
eb9cceb5 | 1348 | |
7e32c194 KS |
1349 | if (!yaml_parser_remove_simple_key(parser)) |
1350 | return 0; | |
1351 | ||
1352 | parser->simple_key_allowed = 0; | |
eb9cceb5 | 1353 | |
625fcfe9 | 1354 | /* Create the STREAM-END token and append it to the queue. */ |
eb9cceb5 | 1355 | |
625fcfe9 | 1356 | STREAM_END_TOKEN_INIT(token, parser->mark, parser->mark); |
eb9cceb5 | 1357 | |
625fcfe9 | 1358 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1359 | return 0; |
eb9cceb5 KS |
1360 | |
1361 | return 1; | |
1362 | } | |
1363 | ||
1364 | /* | |
625fcfe9 | 1365 | * Produce a VERSION-DIRECTIVE or TAG-DIRECTIVE token. |
eb9cceb5 KS |
1366 | */ |
1367 | ||
1368 | static int | |
1369 | yaml_parser_fetch_directive(yaml_parser_t *parser) | |
1370 | { | |
625fcfe9 | 1371 | yaml_token_t token; |
eb9cceb5 KS |
1372 | |
1373 | /* Reset the indentation level. */ | |
1374 | ||
1375 | if (!yaml_parser_unroll_indent(parser, -1)) | |
1376 | return 0; | |
1377 | ||
1378 | /* Reset simple keys. */ | |
1379 | ||
1380 | if (!yaml_parser_remove_simple_key(parser)) | |
1381 | return 0; | |
1382 | ||
1383 | parser->simple_key_allowed = 0; | |
1384 | ||
1385 | /* Create the YAML-DIRECTIVE or TAG-DIRECTIVE token. */ | |
1386 | ||
625fcfe9 KS |
1387 | if (!yaml_parser_scan_directive(parser, &token)) |
1388 | return 0; | |
eb9cceb5 KS |
1389 | |
1390 | /* Append the token to the queue. */ | |
1391 | ||
625fcfe9 KS |
1392 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1393 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1394 | return 0; |
1395 | } | |
1396 | ||
1397 | return 1; | |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * Produce the DOCUMENT-START or DOCUMENT-END token. | |
1402 | */ | |
1403 | ||
1404 | static int | |
1405 | yaml_parser_fetch_document_indicator(yaml_parser_t *parser, | |
1406 | yaml_token_type_t type) | |
1407 | { | |
1408 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1409 | yaml_token_t token; |
eb9cceb5 KS |
1410 | |
1411 | /* Reset the indentation level. */ | |
1412 | ||
1413 | if (!yaml_parser_unroll_indent(parser, -1)) | |
1414 | return 0; | |
1415 | ||
1416 | /* Reset simple keys. */ | |
1417 | ||
1418 | if (!yaml_parser_remove_simple_key(parser)) | |
1419 | return 0; | |
1420 | ||
1421 | parser->simple_key_allowed = 0; | |
1422 | ||
1423 | /* Consume the token. */ | |
1424 | ||
625fcfe9 | 1425 | start_mark = parser->mark; |
eb9cceb5 | 1426 | |
625fcfe9 KS |
1427 | SKIP(parser); |
1428 | SKIP(parser); | |
1429 | SKIP(parser); | |
eb9cceb5 | 1430 | |
625fcfe9 | 1431 | end_mark = parser->mark; |
eb9cceb5 KS |
1432 | |
1433 | /* Create the DOCUMENT-START or DOCUMENT-END token. */ | |
1434 | ||
625fcfe9 | 1435 | TOKEN_INIT(token, type, start_mark, end_mark); |
eb9cceb5 KS |
1436 | |
1437 | /* Append the token to the queue. */ | |
1438 | ||
625fcfe9 | 1439 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1440 | return 0; |
eb9cceb5 KS |
1441 | |
1442 | return 1; | |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * Produce the FLOW-SEQUENCE-START or FLOW-MAPPING-START token. | |
1447 | */ | |
1448 | ||
1449 | static int | |
1450 | yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser, | |
1451 | yaml_token_type_t type) | |
1452 | { | |
1453 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1454 | yaml_token_t token; |
eb9cceb5 KS |
1455 | |
1456 | /* The indicators '[' and '{' may start a simple key. */ | |
1457 | ||
1458 | if (!yaml_parser_save_simple_key(parser)) | |
1459 | return 0; | |
1460 | ||
1461 | /* Increase the flow level. */ | |
1462 | ||
1463 | if (!yaml_parser_increase_flow_level(parser)) | |
1464 | return 0; | |
1465 | ||
1466 | /* A simple key may follow the indicators '[' and '{'. */ | |
1467 | ||
1468 | parser->simple_key_allowed = 1; | |
1469 | ||
1470 | /* Consume the token. */ | |
1471 | ||
625fcfe9 KS |
1472 | start_mark = parser->mark; |
1473 | SKIP(parser); | |
1474 | end_mark = parser->mark; | |
eb9cceb5 KS |
1475 | |
1476 | /* Create the FLOW-SEQUENCE-START of FLOW-MAPPING-START token. */ | |
1477 | ||
625fcfe9 | 1478 | TOKEN_INIT(token, type, start_mark, end_mark); |
eb9cceb5 KS |
1479 | |
1480 | /* Append the token to the queue. */ | |
1481 | ||
625fcfe9 | 1482 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1483 | return 0; |
eb9cceb5 KS |
1484 | |
1485 | return 1; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Produce the FLOW-SEQUENCE-END or FLOW-MAPPING-END token. | |
1490 | */ | |
1491 | ||
1492 | static int | |
1493 | yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser, | |
1494 | yaml_token_type_t type) | |
1495 | { | |
1496 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1497 | yaml_token_t token; |
eb9cceb5 KS |
1498 | |
1499 | /* Reset any potential simple key on the current flow level. */ | |
1500 | ||
1501 | if (!yaml_parser_remove_simple_key(parser)) | |
1502 | return 0; | |
1503 | ||
1504 | /* Decrease the flow level. */ | |
1505 | ||
1506 | if (!yaml_parser_decrease_flow_level(parser)) | |
1507 | return 0; | |
1508 | ||
1509 | /* No simple keys after the indicators ']' and '}'. */ | |
1510 | ||
1511 | parser->simple_key_allowed = 0; | |
1512 | ||
1513 | /* Consume the token. */ | |
1514 | ||
625fcfe9 KS |
1515 | start_mark = parser->mark; |
1516 | SKIP(parser); | |
1517 | end_mark = parser->mark; | |
eb9cceb5 KS |
1518 | |
1519 | /* Create the FLOW-SEQUENCE-END of FLOW-MAPPING-END token. */ | |
1520 | ||
625fcfe9 | 1521 | TOKEN_INIT(token, type, start_mark, end_mark); |
eb9cceb5 KS |
1522 | |
1523 | /* Append the token to the queue. */ | |
1524 | ||
625fcfe9 | 1525 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1526 | return 0; |
eb9cceb5 KS |
1527 | |
1528 | return 1; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Produce the FLOW-ENTRY token. | |
1533 | */ | |
1534 | ||
1535 | static int | |
1536 | yaml_parser_fetch_flow_entry(yaml_parser_t *parser) | |
1537 | { | |
1538 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1539 | yaml_token_t token; |
eb9cceb5 KS |
1540 | |
1541 | /* Reset any potential simple keys on the current flow level. */ | |
1542 | ||
1543 | if (!yaml_parser_remove_simple_key(parser)) | |
1544 | return 0; | |
1545 | ||
1546 | /* Simple keys are allowed after ','. */ | |
1547 | ||
1548 | parser->simple_key_allowed = 1; | |
1549 | ||
1550 | /* Consume the token. */ | |
1551 | ||
625fcfe9 KS |
1552 | start_mark = parser->mark; |
1553 | SKIP(parser); | |
1554 | end_mark = parser->mark; | |
eb9cceb5 | 1555 | |
625fcfe9 | 1556 | /* Create the FLOW-ENTRY token and append it to the queue. */ |
eb9cceb5 | 1557 | |
625fcfe9 | 1558 | TOKEN_INIT(token, YAML_FLOW_ENTRY_TOKEN, start_mark, end_mark); |
eb9cceb5 | 1559 | |
625fcfe9 | 1560 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1561 | return 0; |
eb9cceb5 KS |
1562 | |
1563 | return 1; | |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | * Produce the BLOCK-ENTRY token. | |
1568 | */ | |
1569 | ||
1570 | static int | |
1571 | yaml_parser_fetch_block_entry(yaml_parser_t *parser) | |
1572 | { | |
1573 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1574 | yaml_token_t token; |
eb9cceb5 KS |
1575 | |
1576 | /* Check if the scanner is in the block context. */ | |
1577 | ||
1578 | if (!parser->flow_level) | |
1579 | { | |
1580 | /* Check if we are allowed to start a new entry. */ | |
1581 | ||
1582 | if (!parser->simple_key_allowed) { | |
625fcfe9 | 1583 | return yaml_parser_set_scanner_error(parser, NULL, parser->mark, |
eb9cceb5 KS |
1584 | "block sequence entries are not allowed in this context"); |
1585 | } | |
1586 | ||
1587 | /* Add the BLOCK-SEQUENCE-START token if needed. */ | |
1588 | ||
625fcfe9 KS |
1589 | if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, |
1590 | YAML_BLOCK_SEQUENCE_START_TOKEN, parser->mark)) | |
eb9cceb5 KS |
1591 | return 0; |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | /* | |
1596 | * It is an error for the '-' indicator to occur in the flow context, | |
1597 | * but we let the Parser detect and report about it because the Parser | |
1598 | * is able to point to the context. | |
1599 | */ | |
1600 | } | |
1601 | ||
1602 | /* Reset any potential simple keys on the current flow level. */ | |
1603 | ||
1604 | if (!yaml_parser_remove_simple_key(parser)) | |
1605 | return 0; | |
1606 | ||
1607 | /* Simple keys are allowed after '-'. */ | |
1608 | ||
1609 | parser->simple_key_allowed = 1; | |
1610 | ||
1611 | /* Consume the token. */ | |
1612 | ||
625fcfe9 KS |
1613 | start_mark = parser->mark; |
1614 | SKIP(parser); | |
1615 | end_mark = parser->mark; | |
eb9cceb5 | 1616 | |
625fcfe9 | 1617 | /* Create the BLOCK-ENTRY token and append it to the queue. */ |
eb9cceb5 | 1618 | |
625fcfe9 | 1619 | TOKEN_INIT(token, YAML_BLOCK_ENTRY_TOKEN, start_mark, end_mark); |
eb9cceb5 | 1620 | |
625fcfe9 | 1621 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1622 | return 0; |
eb9cceb5 KS |
1623 | |
1624 | return 1; | |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * Produce the KEY token. | |
1629 | */ | |
1630 | ||
1631 | static int | |
1632 | yaml_parser_fetch_key(yaml_parser_t *parser) | |
1633 | { | |
1634 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 1635 | yaml_token_t token; |
eb9cceb5 KS |
1636 | |
1637 | /* In the block context, additional checks are required. */ | |
1638 | ||
1639 | if (!parser->flow_level) | |
1640 | { | |
1641 | /* Check if we are allowed to start a new key (not nessesary simple). */ | |
1642 | ||
1643 | if (!parser->simple_key_allowed) { | |
625fcfe9 | 1644 | return yaml_parser_set_scanner_error(parser, NULL, parser->mark, |
eb9cceb5 KS |
1645 | "mapping keys are not allowed in this context"); |
1646 | } | |
1647 | ||
1648 | /* Add the BLOCK-MAPPING-START token if needed. */ | |
1649 | ||
625fcfe9 KS |
1650 | if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, |
1651 | YAML_BLOCK_MAPPING_START_TOKEN, parser->mark)) | |
eb9cceb5 KS |
1652 | return 0; |
1653 | } | |
1654 | ||
1655 | /* Reset any potential simple keys on the current flow level. */ | |
1656 | ||
1657 | if (!yaml_parser_remove_simple_key(parser)) | |
1658 | return 0; | |
1659 | ||
1660 | /* Simple keys are allowed after '?' in the block context. */ | |
1661 | ||
1662 | parser->simple_key_allowed = (!parser->flow_level); | |
1663 | ||
1664 | /* Consume the token. */ | |
1665 | ||
625fcfe9 KS |
1666 | start_mark = parser->mark; |
1667 | SKIP(parser); | |
1668 | end_mark = parser->mark; | |
eb9cceb5 | 1669 | |
625fcfe9 | 1670 | /* Create the KEY token and append it to the queue. */ |
eb9cceb5 | 1671 | |
625fcfe9 | 1672 | TOKEN_INIT(token, YAML_KEY_TOKEN, start_mark, end_mark); |
eb9cceb5 | 1673 | |
625fcfe9 | 1674 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1675 | return 0; |
eb9cceb5 KS |
1676 | |
1677 | return 1; | |
1678 | } | |
1679 | ||
1680 | /* | |
1681 | * Produce the VALUE token. | |
1682 | */ | |
1683 | ||
1684 | static int | |
1685 | yaml_parser_fetch_value(yaml_parser_t *parser) | |
1686 | { | |
1687 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 KS |
1688 | yaml_token_t token; |
1689 | yaml_simple_key_t *simple_key = parser->simple_keys.top-1; | |
eb9cceb5 KS |
1690 | |
1691 | /* Have we found a simple key? */ | |
1692 | ||
625fcfe9 | 1693 | if (simple_key->possible) |
eb9cceb5 | 1694 | { |
eb9cceb5 | 1695 | |
625fcfe9 | 1696 | /* Create the KEY token and insert it into the queue. */ |
eb9cceb5 | 1697 | |
625fcfe9 | 1698 | TOKEN_INIT(token, YAML_KEY_TOKEN, simple_key->mark, simple_key->mark); |
eb9cceb5 | 1699 | |
625fcfe9 KS |
1700 | if (!QUEUE_INSERT(parser, parser->tokens, |
1701 | simple_key->token_number - parser->tokens_parsed, token)) | |
eb9cceb5 | 1702 | return 0; |
eb9cceb5 KS |
1703 | |
1704 | /* In the block context, we may need to add the BLOCK-MAPPING-START token. */ | |
1705 | ||
625fcfe9 | 1706 | if (!yaml_parser_roll_indent(parser, simple_key->mark.column, |
eb9cceb5 KS |
1707 | simple_key->token_number, |
1708 | YAML_BLOCK_MAPPING_START_TOKEN, simple_key->mark)) | |
1709 | return 0; | |
1710 | ||
625fcfe9 | 1711 | /* Remove the simple key. */ |
eb9cceb5 | 1712 | |
625fcfe9 | 1713 | simple_key->possible = 0; |
eb9cceb5 KS |
1714 | |
1715 | /* A simple key cannot follow another simple key. */ | |
1716 | ||
1717 | parser->simple_key_allowed = 0; | |
1718 | } | |
1719 | else | |
1720 | { | |
1721 | /* The ':' indicator follows a complex key. */ | |
1722 | ||
1723 | /* In the block context, extra checks are required. */ | |
1724 | ||
1725 | if (!parser->flow_level) | |
1726 | { | |
1727 | /* Check if we are allowed to start a complex value. */ | |
1728 | ||
1729 | if (!parser->simple_key_allowed) { | |
625fcfe9 | 1730 | return yaml_parser_set_scanner_error(parser, NULL, parser->mark, |
eb9cceb5 KS |
1731 | "mapping values are not allowed in this context"); |
1732 | } | |
1733 | ||
1734 | /* Add the BLOCK-MAPPING-START token if needed. */ | |
1735 | ||
625fcfe9 KS |
1736 | if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, |
1737 | YAML_BLOCK_MAPPING_START_TOKEN, parser->mark)) | |
eb9cceb5 KS |
1738 | return 0; |
1739 | } | |
1740 | ||
eb9cceb5 KS |
1741 | /* Simple keys after ':' are allowed in the block context. */ |
1742 | ||
1743 | parser->simple_key_allowed = (!parser->flow_level); | |
1744 | } | |
1745 | ||
1746 | /* Consume the token. */ | |
1747 | ||
625fcfe9 KS |
1748 | start_mark = parser->mark; |
1749 | SKIP(parser); | |
1750 | end_mark = parser->mark; | |
eb9cceb5 | 1751 | |
625fcfe9 | 1752 | /* Create the VALUE token and append it to the queue. */ |
eb9cceb5 | 1753 | |
625fcfe9 | 1754 | TOKEN_INIT(token, YAML_VALUE_TOKEN, start_mark, end_mark); |
eb9cceb5 | 1755 | |
625fcfe9 | 1756 | if (!ENQUEUE(parser, parser->tokens, token)) |
eb9cceb5 | 1757 | return 0; |
eb9cceb5 KS |
1758 | |
1759 | return 1; | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * Produce the ALIAS or ANCHOR token. | |
1764 | */ | |
1765 | ||
1766 | static int | |
1767 | yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type) | |
1768 | { | |
625fcfe9 | 1769 | yaml_token_t token; |
eb9cceb5 KS |
1770 | |
1771 | /* An anchor or an alias could be a simple key. */ | |
1772 | ||
1773 | if (!yaml_parser_save_simple_key(parser)) | |
1774 | return 0; | |
1775 | ||
1776 | /* A simple key cannot follow an anchor or an alias. */ | |
1777 | ||
1778 | parser->simple_key_allowed = 0; | |
1779 | ||
625fcfe9 | 1780 | /* Create the ALIAS or ANCHOR token and append it to the queue. */ |
eb9cceb5 | 1781 | |
625fcfe9 KS |
1782 | if (!yaml_parser_scan_anchor(parser, &token, type)) |
1783 | return 0; | |
eb9cceb5 | 1784 | |
625fcfe9 KS |
1785 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1786 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1787 | return 0; |
1788 | } | |
eb9cceb5 KS |
1789 | return 1; |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Produce the TAG token. | |
1794 | */ | |
1795 | ||
1796 | static int | |
1797 | yaml_parser_fetch_tag(yaml_parser_t *parser) | |
1798 | { | |
625fcfe9 | 1799 | yaml_token_t token; |
eb9cceb5 KS |
1800 | |
1801 | /* A tag could be a simple key. */ | |
1802 | ||
1803 | if (!yaml_parser_save_simple_key(parser)) | |
1804 | return 0; | |
1805 | ||
1806 | /* A simple key cannot follow a tag. */ | |
1807 | ||
1808 | parser->simple_key_allowed = 0; | |
1809 | ||
625fcfe9 | 1810 | /* Create the TAG token and append it to the queue. */ |
eb9cceb5 | 1811 | |
625fcfe9 KS |
1812 | if (!yaml_parser_scan_tag(parser, &token)) |
1813 | return 0; | |
eb9cceb5 | 1814 | |
625fcfe9 KS |
1815 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1816 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1817 | return 0; |
1818 | } | |
1819 | ||
1820 | return 1; | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Produce the SCALAR(...,literal) or SCALAR(...,folded) tokens. | |
1825 | */ | |
1826 | ||
1827 | static int | |
1828 | yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal) | |
1829 | { | |
625fcfe9 | 1830 | yaml_token_t token; |
eb9cceb5 KS |
1831 | |
1832 | /* Remove any potential simple keys. */ | |
1833 | ||
1834 | if (!yaml_parser_remove_simple_key(parser)) | |
1835 | return 0; | |
1836 | ||
1837 | /* A simple key may follow a block scalar. */ | |
1838 | ||
1839 | parser->simple_key_allowed = 1; | |
1840 | ||
625fcfe9 | 1841 | /* Create the SCALAR token and append it to the queue. */ |
eb9cceb5 | 1842 | |
625fcfe9 KS |
1843 | if (!yaml_parser_scan_block_scalar(parser, &token, literal)) |
1844 | return 0; | |
eb9cceb5 | 1845 | |
625fcfe9 KS |
1846 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1847 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1848 | return 0; |
1849 | } | |
1850 | ||
1851 | return 1; | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * Produce the SCALAR(...,single-quoted) or SCALAR(...,double-quoted) tokens. | |
1856 | */ | |
1857 | ||
1858 | static int | |
1859 | yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single) | |
1860 | { | |
625fcfe9 | 1861 | yaml_token_t token; |
eb9cceb5 KS |
1862 | |
1863 | /* A plain scalar could be a simple key. */ | |
1864 | ||
1865 | if (!yaml_parser_save_simple_key(parser)) | |
1866 | return 0; | |
1867 | ||
1868 | /* A simple key cannot follow a flow scalar. */ | |
1869 | ||
1870 | parser->simple_key_allowed = 0; | |
1871 | ||
625fcfe9 | 1872 | /* Create the SCALAR token and append it to the queue. */ |
eb9cceb5 | 1873 | |
625fcfe9 KS |
1874 | if (!yaml_parser_scan_flow_scalar(parser, &token, single)) |
1875 | return 0; | |
eb9cceb5 | 1876 | |
625fcfe9 KS |
1877 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1878 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1879 | return 0; |
1880 | } | |
1881 | ||
1882 | return 1; | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * Produce the SCALAR(...,plain) token. | |
1887 | */ | |
1888 | ||
1889 | static int | |
1890 | yaml_parser_fetch_plain_scalar(yaml_parser_t *parser) | |
1891 | { | |
625fcfe9 | 1892 | yaml_token_t token; |
eb9cceb5 KS |
1893 | |
1894 | /* A plain scalar could be a simple key. */ | |
1895 | ||
1896 | if (!yaml_parser_save_simple_key(parser)) | |
1897 | return 0; | |
1898 | ||
1899 | /* A simple key cannot follow a flow scalar. */ | |
1900 | ||
1901 | parser->simple_key_allowed = 0; | |
1902 | ||
625fcfe9 | 1903 | /* Create the SCALAR token and append it to the queue. */ |
eb9cceb5 | 1904 | |
625fcfe9 KS |
1905 | if (!yaml_parser_scan_plain_scalar(parser, &token)) |
1906 | return 0; | |
eb9cceb5 | 1907 | |
625fcfe9 KS |
1908 | if (!ENQUEUE(parser, parser->tokens, token)) { |
1909 | yaml_token_delete(&token); | |
eb9cceb5 KS |
1910 | return 0; |
1911 | } | |
1912 | ||
1913 | return 1; | |
1914 | } | |
1915 | ||
e71095e3 KS |
1916 | /* |
1917 | * Eat whitespaces and comments until the next token is found. | |
1918 | */ | |
1919 | ||
1920 | static int | |
1921 | yaml_parser_scan_to_next_token(yaml_parser_t *parser) | |
1922 | { | |
1923 | /* Until the next token is not found. */ | |
1924 | ||
1925 | while (1) | |
1926 | { | |
1927 | /* Allow the BOM mark to start a line. */ | |
1928 | ||
625fcfe9 | 1929 | if (!CACHE(parser, 1)) return 0; |
e71095e3 | 1930 | |
e35af832 | 1931 | if (parser->mark.column == 0 && IS_BOM(parser->buffer)) |
625fcfe9 | 1932 | SKIP(parser); |
e71095e3 KS |
1933 | |
1934 | /* | |
1935 | * Eat whitespaces. | |
1936 | * | |
1937 | * Tabs are allowed: | |
1938 | * | |
1939 | * - in the flow context; | |
1940 | * - in the block context, but not at the beginning of the line or | |
1941 | * after '-', '?', or ':' (complex value). | |
1942 | */ | |
1943 | ||
625fcfe9 | 1944 | if (!CACHE(parser, 1)) return 0; |
e71095e3 | 1945 | |
e35af832 | 1946 | while (CHECK(parser->buffer,' ') || |
e71095e3 | 1947 | ((parser->flow_level || !parser->simple_key_allowed) && |
e35af832 | 1948 | CHECK(parser->buffer, '\t'))) { |
625fcfe9 KS |
1949 | SKIP(parser); |
1950 | if (!CACHE(parser, 1)) return 0; | |
e71095e3 KS |
1951 | } |
1952 | ||
1953 | /* Eat a comment until a line break. */ | |
1954 | ||
e35af832 KS |
1955 | if (CHECK(parser->buffer, '#')) { |
1956 | while (!IS_BREAKZ(parser->buffer)) { | |
625fcfe9 KS |
1957 | SKIP(parser); |
1958 | if (!CACHE(parser, 1)) return 0; | |
e71095e3 KS |
1959 | } |
1960 | } | |
1961 | ||
1962 | /* If it is a line break, eat it. */ | |
1963 | ||
e35af832 | 1964 | if (IS_BREAK(parser->buffer)) |
e71095e3 | 1965 | { |
625fcfe9 KS |
1966 | if (!CACHE(parser, 2)) return 0; |
1967 | SKIP_LINE(parser); | |
e71095e3 KS |
1968 | |
1969 | /* In the block context, a new line may start a simple key. */ | |
1970 | ||
1971 | if (!parser->flow_level) { | |
1972 | parser->simple_key_allowed = 1; | |
1973 | } | |
1974 | } | |
1975 | else | |
1976 | { | |
1977 | /* We have found a token. */ | |
1978 | ||
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | return 1; | |
1984 | } | |
1985 | ||
1986 | /* | |
1987 | * Scan a YAML-DIRECTIVE or TAG-DIRECTIVE token. | |
1988 | * | |
1989 | * Scope: | |
1990 | * %YAML 1.1 # a comment \n | |
1991 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
1992 | * %TAG !yaml! tag:yaml.org,2002: \n | |
1993 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
1994 | */ | |
1995 | ||
625fcfe9 KS |
1996 | int |
1997 | yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token) | |
e71095e3 KS |
1998 | { |
1999 | yaml_mark_t start_mark, end_mark; | |
2000 | yaml_char_t *name = NULL; | |
2001 | int major, minor; | |
2002 | yaml_char_t *handle = NULL, *prefix = NULL; | |
e71095e3 KS |
2003 | |
2004 | /* Eat '%'. */ | |
2005 | ||
625fcfe9 | 2006 | start_mark = parser->mark; |
e71095e3 | 2007 | |
625fcfe9 | 2008 | SKIP(parser); |
e71095e3 KS |
2009 | |
2010 | /* Scan the directive name. */ | |
2011 | ||
2012 | if (!yaml_parser_scan_directive_name(parser, start_mark, &name)) | |
2013 | goto error; | |
2014 | ||
2015 | /* Is it a YAML directive? */ | |
2016 | ||
2017 | if (strcmp((char *)name, "YAML") == 0) | |
2018 | { | |
2019 | /* Scan the VERSION directive value. */ | |
2020 | ||
2021 | if (!yaml_parser_scan_version_directive_value(parser, start_mark, | |
2022 | &major, &minor)) | |
2023 | goto error; | |
2024 | ||
625fcfe9 | 2025 | end_mark = parser->mark; |
e71095e3 KS |
2026 | |
2027 | /* Create a VERSION-DIRECTIVE token. */ | |
2028 | ||
625fcfe9 | 2029 | VERSION_DIRECTIVE_TOKEN_INIT(*token, major, minor, |
e71095e3 | 2030 | start_mark, end_mark); |
e71095e3 KS |
2031 | } |
2032 | ||
2033 | /* Is it a TAG directive? */ | |
2034 | ||
2035 | else if (strcmp((char *)name, "TAG") == 0) | |
2036 | { | |
2037 | /* Scan the TAG directive value. */ | |
2038 | ||
2039 | if (!yaml_parser_scan_tag_directive_value(parser, start_mark, | |
2040 | &handle, &prefix)) | |
2041 | goto error; | |
2042 | ||
625fcfe9 | 2043 | end_mark = parser->mark; |
e71095e3 KS |
2044 | |
2045 | /* Create a TAG-DIRECTIVE token. */ | |
2046 | ||
625fcfe9 | 2047 | TAG_DIRECTIVE_TOKEN_INIT(*token, handle, prefix, |
e71095e3 | 2048 | start_mark, end_mark); |
e71095e3 KS |
2049 | } |
2050 | ||
2051 | /* Unknown directive. */ | |
2052 | ||
2053 | else | |
2054 | { | |
92d41fe1 | 2055 | yaml_parser_set_scanner_error(parser, "while scanning a directive", |
bdf4d192 | 2056 | start_mark, "found unknown directive name"); |
e71095e3 KS |
2057 | goto error; |
2058 | } | |
2059 | ||
2060 | /* Eat the rest of the line including any comments. */ | |
2061 | ||
625fcfe9 KS |
2062 | if (!CACHE(parser, 1)) goto error; |
2063 | ||
e35af832 | 2064 | while (IS_BLANK(parser->buffer)) { |
625fcfe9 KS |
2065 | SKIP(parser); |
2066 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2067 | } |
2068 | ||
e35af832 KS |
2069 | if (CHECK(parser->buffer, '#')) { |
2070 | while (!IS_BREAKZ(parser->buffer)) { | |
625fcfe9 KS |
2071 | SKIP(parser); |
2072 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2073 | } |
2074 | } | |
2075 | ||
2076 | /* Check if we are at the end of the line. */ | |
2077 | ||
e35af832 | 2078 | if (!IS_BREAKZ(parser->buffer)) { |
92d41fe1 | 2079 | yaml_parser_set_scanner_error(parser, "while scanning a directive", |
6be8109b | 2080 | start_mark, "did not find expected comment or line break"); |
e71095e3 KS |
2081 | goto error; |
2082 | } | |
2083 | ||
2084 | /* Eat a line break. */ | |
2085 | ||
e35af832 | 2086 | if (IS_BREAK(parser->buffer)) { |
625fcfe9 KS |
2087 | if (!CACHE(parser, 2)) goto error; |
2088 | SKIP_LINE(parser); | |
e71095e3 KS |
2089 | } |
2090 | ||
2091 | yaml_free(name); | |
2092 | ||
625fcfe9 | 2093 | return 1; |
e71095e3 KS |
2094 | |
2095 | error: | |
e71095e3 KS |
2096 | yaml_free(prefix); |
2097 | yaml_free(handle); | |
2098 | yaml_free(name); | |
625fcfe9 | 2099 | return 0; |
e71095e3 KS |
2100 | } |
2101 | ||
2102 | /* | |
2103 | * Scan the directive name. | |
2104 | * | |
2105 | * Scope: | |
2106 | * %YAML 1.1 # a comment \n | |
2107 | * ^^^^ | |
2108 | * %TAG !yaml! tag:yaml.org,2002: \n | |
2109 | * ^^^ | |
2110 | */ | |
2111 | ||
2112 | static int | |
2113 | yaml_parser_scan_directive_name(yaml_parser_t *parser, | |
2114 | yaml_mark_t start_mark, yaml_char_t **name) | |
2115 | { | |
625fcfe9 | 2116 | yaml_string_t string = NULL_STRING; |
e71095e3 | 2117 | |
625fcfe9 | 2118 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
e71095e3 KS |
2119 | |
2120 | /* Consume the directive name. */ | |
2121 | ||
625fcfe9 | 2122 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2123 | |
e35af832 | 2124 | while (IS_ALPHA(parser->buffer)) |
e71095e3 | 2125 | { |
625fcfe9 KS |
2126 | if (!READ(parser, string)) goto error; |
2127 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2128 | } |
2129 | ||
2130 | /* Check if the name is empty. */ | |
2131 | ||
625fcfe9 | 2132 | if (string.start == string.pointer) { |
e71095e3 | 2133 | yaml_parser_set_scanner_error(parser, "while scanning a directive", |
6be8109b | 2134 | start_mark, "could not find expected directive name"); |
e71095e3 KS |
2135 | goto error; |
2136 | } | |
2137 | ||
2138 | /* Check for an blank character after the name. */ | |
2139 | ||
e35af832 | 2140 | if (!IS_BLANKZ(parser->buffer)) { |
e71095e3 KS |
2141 | yaml_parser_set_scanner_error(parser, "while scanning a directive", |
2142 | start_mark, "found unexpected non-alphabetical character"); | |
2143 | goto error; | |
2144 | } | |
2145 | ||
625fcfe9 | 2146 | *name = string.start; |
e71095e3 KS |
2147 | |
2148 | return 1; | |
2149 | ||
2150 | error: | |
625fcfe9 | 2151 | STRING_DEL(parser, string); |
e71095e3 KS |
2152 | return 0; |
2153 | } | |
2154 | ||
2155 | /* | |
2156 | * Scan the value of VERSION-DIRECTIVE. | |
2157 | * | |
2158 | * Scope: | |
2159 | * %YAML 1.1 # a comment \n | |
2160 | * ^^^^^^ | |
2161 | */ | |
2162 | ||
2163 | static int | |
2164 | yaml_parser_scan_version_directive_value(yaml_parser_t *parser, | |
2165 | yaml_mark_t start_mark, int *major, int *minor) | |
2166 | { | |
2167 | /* Eat whitespaces. */ | |
2168 | ||
625fcfe9 | 2169 | if (!CACHE(parser, 1)) return 0; |
e71095e3 | 2170 | |
e35af832 | 2171 | while (IS_BLANK(parser->buffer)) { |
625fcfe9 KS |
2172 | SKIP(parser); |
2173 | if (!CACHE(parser, 1)) return 0; | |
e71095e3 KS |
2174 | } |
2175 | ||
2176 | /* Consume the major version number. */ | |
2177 | ||
2178 | if (!yaml_parser_scan_version_directive_number(parser, start_mark, major)) | |
2179 | return 0; | |
2180 | ||
2181 | /* Eat '.'. */ | |
2182 | ||
e35af832 | 2183 | if (!CHECK(parser->buffer, '.')) { |
e71095e3 KS |
2184 | return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", |
2185 | start_mark, "did not find expected digit or '.' character"); | |
2186 | } | |
2187 | ||
625fcfe9 | 2188 | SKIP(parser); |
e71095e3 KS |
2189 | |
2190 | /* Consume the minor version number. */ | |
2191 | ||
2192 | if (!yaml_parser_scan_version_directive_number(parser, start_mark, minor)) | |
2193 | return 0; | |
ab01bac8 KS |
2194 | |
2195 | return 1; | |
e71095e3 KS |
2196 | } |
2197 | ||
2198 | #define MAX_NUMBER_LENGTH 9 | |
2199 | ||
2200 | /* | |
2201 | * Scan the version number of VERSION-DIRECTIVE. | |
2202 | * | |
2203 | * Scope: | |
2204 | * %YAML 1.1 # a comment \n | |
2205 | * ^ | |
2206 | * %YAML 1.1 # a comment \n | |
2207 | * ^ | |
2208 | */ | |
2209 | ||
2210 | static int | |
2211 | yaml_parser_scan_version_directive_number(yaml_parser_t *parser, | |
2212 | yaml_mark_t start_mark, int *number) | |
2213 | { | |
2214 | int value = 0; | |
2215 | size_t length = 0; | |
2216 | ||
2217 | /* Repeat while the next character is digit. */ | |
2218 | ||
625fcfe9 | 2219 | if (!CACHE(parser, 1)) return 0; |
e71095e3 | 2220 | |
e35af832 | 2221 | while (IS_DIGIT(parser->buffer)) |
e71095e3 KS |
2222 | { |
2223 | /* Check if the number is too long. */ | |
2224 | ||
2225 | if (++length > MAX_NUMBER_LENGTH) { | |
2226 | return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", | |
2227 | start_mark, "found extremely long version number"); | |
2228 | } | |
2229 | ||
e35af832 | 2230 | value = value*10 + AS_DIGIT(parser->buffer); |
e71095e3 | 2231 | |
625fcfe9 | 2232 | SKIP(parser); |
e71095e3 | 2233 | |
625fcfe9 | 2234 | if (!CACHE(parser, 1)) return 0; |
e71095e3 KS |
2235 | } |
2236 | ||
2237 | /* Check if the number was present. */ | |
2238 | ||
2239 | if (!length) { | |
2240 | return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", | |
2241 | start_mark, "did not find expected version number"); | |
2242 | } | |
2243 | ||
2244 | *number = value; | |
2245 | ||
2246 | return 1; | |
2247 | } | |
2248 | ||
2249 | /* | |
2250 | * Scan the value of a TAG-DIRECTIVE token. | |
2251 | * | |
2252 | * Scope: | |
2253 | * %TAG !yaml! tag:yaml.org,2002: \n | |
2254 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
2255 | */ | |
2256 | ||
2257 | static int | |
2258 | yaml_parser_scan_tag_directive_value(yaml_parser_t *parser, | |
2259 | yaml_mark_t start_mark, yaml_char_t **handle, yaml_char_t **prefix) | |
2260 | { | |
2261 | yaml_char_t *handle_value = NULL; | |
2262 | yaml_char_t *prefix_value = NULL; | |
2263 | ||
2264 | /* Eat whitespaces. */ | |
2265 | ||
625fcfe9 | 2266 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2267 | |
e35af832 | 2268 | while (IS_BLANK(parser->buffer)) { |
625fcfe9 KS |
2269 | SKIP(parser); |
2270 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2271 | } |
2272 | ||
2273 | /* Scan a handle. */ | |
2274 | ||
2275 | if (!yaml_parser_scan_tag_handle(parser, 1, start_mark, &handle_value)) | |
2276 | goto error; | |
2277 | ||
2278 | /* Expect a whitespace. */ | |
2279 | ||
625fcfe9 | 2280 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2281 | |
e35af832 | 2282 | if (!IS_BLANK(parser->buffer)) { |
e71095e3 KS |
2283 | yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive", |
2284 | start_mark, "did not find expected whitespace"); | |
2285 | goto error; | |
2286 | } | |
2287 | ||
2288 | /* Eat whitespaces. */ | |
2289 | ||
e35af832 | 2290 | while (IS_BLANK(parser->buffer)) { |
625fcfe9 KS |
2291 | SKIP(parser); |
2292 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2293 | } |
2294 | ||
2295 | /* Scan a prefix. */ | |
2296 | ||
2297 | if (!yaml_parser_scan_tag_uri(parser, 1, NULL, start_mark, &prefix_value)) | |
2298 | goto error; | |
2299 | ||
2300 | /* Expect a whitespace or line break. */ | |
2301 | ||
625fcfe9 | 2302 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2303 | |
e35af832 | 2304 | if (!IS_BLANKZ(parser->buffer)) { |
e71095e3 KS |
2305 | yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive", |
2306 | start_mark, "did not find expected whitespace or line break"); | |
2307 | goto error; | |
2308 | } | |
2309 | ||
2310 | *handle = handle_value; | |
2311 | *prefix = prefix_value; | |
2312 | ||
2313 | return 1; | |
2314 | ||
2315 | error: | |
2316 | yaml_free(handle_value); | |
2317 | yaml_free(prefix_value); | |
2318 | return 0; | |
2319 | } | |
2320 | ||
625fcfe9 KS |
2321 | static int |
2322 | yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token, | |
e71095e3 KS |
2323 | yaml_token_type_t type) |
2324 | { | |
2325 | int length = 0; | |
2326 | yaml_mark_t start_mark, end_mark; | |
625fcfe9 | 2327 | yaml_string_t string = NULL_STRING; |
e71095e3 | 2328 | |
625fcfe9 | 2329 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
e71095e3 KS |
2330 | |
2331 | /* Eat the indicator character. */ | |
2332 | ||
625fcfe9 | 2333 | start_mark = parser->mark; |
e71095e3 | 2334 | |
625fcfe9 | 2335 | SKIP(parser); |
e71095e3 KS |
2336 | |
2337 | /* Consume the value. */ | |
2338 | ||
625fcfe9 | 2339 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2340 | |
e35af832 | 2341 | while (IS_ALPHA(parser->buffer)) { |
625fcfe9 KS |
2342 | if (!READ(parser, string)) goto error; |
2343 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2344 | length ++; |
2345 | } | |
2346 | ||
625fcfe9 | 2347 | end_mark = parser->mark; |
e71095e3 KS |
2348 | |
2349 | /* | |
2350 | * Check if length of the anchor is greater than 0 and it is followed by | |
2351 | * a whitespace character or one of the indicators: | |
2352 | * | |
2353 | * '?', ':', ',', ']', '}', '%', '@', '`'. | |
2354 | */ | |
2355 | ||
e35af832 KS |
2356 | if (!length || !(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '?') |
2357 | || CHECK(parser->buffer, ':') || CHECK(parser->buffer, ',') | |
2358 | || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '}') | |
2359 | || CHECK(parser->buffer, '%') || CHECK(parser->buffer, '@') | |
2360 | || CHECK(parser->buffer, '`'))) { | |
e71095e3 KS |
2361 | yaml_parser_set_scanner_error(parser, type == YAML_ANCHOR_TOKEN ? |
2362 | "while scanning an anchor" : "while scanning an alias", start_mark, | |
2363 | "did not find expected alphabetic or numeric character"); | |
2364 | goto error; | |
2365 | } | |
2366 | ||
2367 | /* Create a token. */ | |
2368 | ||
625fcfe9 KS |
2369 | if (type == YAML_ANCHOR_TOKEN) { |
2370 | ANCHOR_TOKEN_INIT(*token, string.start, start_mark, end_mark); | |
2371 | } | |
2372 | else { | |
2373 | ALIAS_TOKEN_INIT(*token, string.start, start_mark, end_mark); | |
92d41fe1 | 2374 | } |
e71095e3 | 2375 | |
625fcfe9 | 2376 | return 1; |
e71095e3 KS |
2377 | |
2378 | error: | |
625fcfe9 | 2379 | STRING_DEL(parser, string); |
e71095e3 KS |
2380 | return 0; |
2381 | } | |
2382 | ||
2383 | /* | |
2384 | * Scan a TAG token. | |
2385 | */ | |
2386 | ||
625fcfe9 KS |
2387 | static int |
2388 | yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token) | |
e71095e3 KS |
2389 | { |
2390 | yaml_char_t *handle = NULL; | |
2391 | yaml_char_t *suffix = NULL; | |
e71095e3 KS |
2392 | yaml_mark_t start_mark, end_mark; |
2393 | ||
625fcfe9 | 2394 | start_mark = parser->mark; |
e71095e3 KS |
2395 | |
2396 | /* Check if the tag is in the canonical form. */ | |
2397 | ||
625fcfe9 | 2398 | if (!CACHE(parser, 2)) goto error; |
e71095e3 | 2399 | |
e35af832 | 2400 | if (CHECK_AT(parser->buffer, '<', 1)) |
e71095e3 KS |
2401 | { |
2402 | /* Set the handle to '' */ | |
2403 | ||
2404 | handle = yaml_malloc(1); | |
2405 | if (!handle) goto error; | |
2406 | handle[0] = '\0'; | |
2407 | ||
2408 | /* Eat '!<' */ | |
2409 | ||
625fcfe9 KS |
2410 | SKIP(parser); |
2411 | SKIP(parser); | |
e71095e3 KS |
2412 | |
2413 | /* Consume the tag value. */ | |
2414 | ||
2415 | if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix)) | |
2416 | goto error; | |
2417 | ||
2418 | /* Check for '>' and eat it. */ | |
2419 | ||
e35af832 | 2420 | if (!CHECK(parser->buffer, '>')) { |
e71095e3 KS |
2421 | yaml_parser_set_scanner_error(parser, "while scanning a tag", |
2422 | start_mark, "did not find the expected '>'"); | |
2423 | goto error; | |
2424 | } | |
2425 | ||
625fcfe9 | 2426 | SKIP(parser); |
e71095e3 KS |
2427 | } |
2428 | else | |
2429 | { | |
2430 | /* The tag has either the '!suffix' or the '!handle!suffix' form. */ | |
2431 | ||
2432 | /* First, try to scan a handle. */ | |
2433 | ||
2434 | if (!yaml_parser_scan_tag_handle(parser, 0, start_mark, &handle)) | |
2435 | goto error; | |
2436 | ||
2437 | /* Check if it is, indeed, handle. */ | |
2438 | ||
2439 | if (handle[0] == '!' && handle[1] != '\0' && handle[strlen((char *)handle)-1] == '!') | |
2440 | { | |
2441 | /* Scan the suffix now. */ | |
2442 | ||
2443 | if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix)) | |
2444 | goto error; | |
2445 | } | |
2446 | else | |
2447 | { | |
2448 | /* It wasn't a handle after all. Scan the rest of the tag. */ | |
2449 | ||
2450 | if (!yaml_parser_scan_tag_uri(parser, 0, handle, start_mark, &suffix)) | |
2451 | goto error; | |
2452 | ||
2453 | /* Set the handle to '!'. */ | |
2454 | ||
2455 | yaml_free(handle); | |
2456 | handle = yaml_malloc(2); | |
2457 | if (!handle) goto error; | |
2458 | handle[0] = '!'; | |
2459 | handle[1] = '\0'; | |
7e32c194 KS |
2460 | |
2461 | /* | |
625fcfe9 KS |
2462 | * A special case: the '!' tag. Set the handle to '' and the |
2463 | * suffix to '!'. | |
7e32c194 KS |
2464 | */ |
2465 | ||
2466 | if (suffix[0] == '\0') { | |
2467 | yaml_char_t *tmp = handle; | |
2468 | handle = suffix; | |
2469 | suffix = tmp; | |
2470 | } | |
e71095e3 KS |
2471 | } |
2472 | } | |
2473 | ||
2474 | /* Check the character which ends the tag. */ | |
2475 | ||
625fcfe9 | 2476 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2477 | |
e35af832 | 2478 | if (!IS_BLANKZ(parser->buffer)) { |
e71095e3 | 2479 | yaml_parser_set_scanner_error(parser, "while scanning a tag", |
6be8109b | 2480 | start_mark, "did not find expected whitespace or line break"); |
e71095e3 KS |
2481 | goto error; |
2482 | } | |
2483 | ||
625fcfe9 | 2484 | end_mark = parser->mark; |
e71095e3 KS |
2485 | |
2486 | /* Create a token. */ | |
2487 | ||
625fcfe9 | 2488 | TAG_TOKEN_INIT(*token, handle, suffix, start_mark, end_mark); |
e71095e3 | 2489 | |
625fcfe9 | 2490 | return 1; |
e71095e3 KS |
2491 | |
2492 | error: | |
2493 | yaml_free(handle); | |
2494 | yaml_free(suffix); | |
625fcfe9 | 2495 | return 0; |
e71095e3 KS |
2496 | } |
2497 | ||
2498 | /* | |
2499 | * Scan a tag handle. | |
2500 | */ | |
2501 | ||
2502 | static int | |
2503 | yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive, | |
2504 | yaml_mark_t start_mark, yaml_char_t **handle) | |
2505 | { | |
625fcfe9 | 2506 | yaml_string_t string = NULL_STRING; |
e71095e3 | 2507 | |
625fcfe9 | 2508 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
e71095e3 KS |
2509 | |
2510 | /* Check the initial '!' character. */ | |
2511 | ||
625fcfe9 | 2512 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2513 | |
e35af832 | 2514 | if (!CHECK(parser->buffer, '!')) { |
e71095e3 KS |
2515 | yaml_parser_set_scanner_error(parser, directive ? |
2516 | "while scanning a tag directive" : "while scanning a tag", | |
2517 | start_mark, "did not find expected '!'"); | |
2518 | goto error; | |
2519 | } | |
2520 | ||
2521 | /* Copy the '!' character. */ | |
2522 | ||
625fcfe9 | 2523 | if (!READ(parser, string)) goto error; |
e71095e3 KS |
2524 | |
2525 | /* Copy all subsequent alphabetical and numerical characters. */ | |
2526 | ||
625fcfe9 | 2527 | if (!CACHE(parser, 1)) goto error; |
e71095e3 | 2528 | |
e35af832 | 2529 | while (IS_ALPHA(parser->buffer)) |
e71095e3 | 2530 | { |
625fcfe9 KS |
2531 | if (!READ(parser, string)) goto error; |
2532 | if (!CACHE(parser, 1)) goto error; | |
e71095e3 KS |
2533 | } |
2534 | ||
2535 | /* Check if the trailing character is '!' and copy it. */ | |
2536 | ||
e35af832 | 2537 | if (CHECK(parser->buffer, '!')) |
e71095e3 | 2538 | { |
625fcfe9 | 2539 | if (!READ(parser, string)) goto error; |
e71095e3 KS |
2540 | } |
2541 | else | |
2542 | { | |
2543 | /* | |
7e32c194 KS |
2544 | * It's either the '!' tag or not really a tag handle. If it's a %TAG |
2545 | * directive, it's an error. If it's a tag token, it must be a part of | |
2546 | * URI. | |
e71095e3 KS |
2547 | */ |
2548 | ||
625fcfe9 | 2549 | if (directive && !(string.start[0] == '!' && string.start[1] == '\0')) { |
7e32c194 | 2550 | yaml_parser_set_scanner_error(parser, "while parsing a tag directive", |
e71095e3 KS |
2551 | start_mark, "did not find expected '!'"); |
2552 | goto error; | |
2553 | } | |
2554 | } | |
2555 | ||
625fcfe9 | 2556 | *handle = string.start; |
e71095e3 KS |
2557 | |
2558 | return 1; | |
2559 | ||
2560 | error: | |
625fcfe9 | 2561 | STRING_DEL(parser, string); |
e71095e3 KS |
2562 | return 0; |
2563 | } | |
2564 | ||
2565 | /* | |
2566 | * Scan a tag. | |
2567 | */ | |
2568 | ||
2569 | static int | |
2570 | yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive, | |
2571 | yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri) | |
2572 | { | |
2573 | size_t length = head ? strlen((char *)head) : 0; | |
625fcfe9 | 2574 | yaml_string_t string = NULL_STRING; |
e71095e3 | 2575 | |
625fcfe9 | 2576 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
e71095e3 KS |
2577 | |
2578 | /* Resize the string to include the head. */ | |
2579 | ||
f56726b9 | 2580 | while ((size_t)(string.end - string.start) <= length) { |
625fcfe9 KS |
2581 | if (!yaml_string_extend(&string.start, &string.pointer, &string.end)) { |
2582 | parser->error = YAML_MEMORY_ERROR; | |
2583 | goto error; | |
2584 | } | |
e71095e3 KS |
2585 | } |
2586 | ||
7e32c194 KS |
2587 | /* |
2588 | * Copy the head if needed. | |
2589 | * | |
2590 | * Note that we don't copy the leading '!' character. | |
2591 | */ | |
e71095e3 | 2592 | |
7e32c194 | 2593 | if (length > 1) { |
625fcfe9 | 2594 | memcpy(string.start, head+1, length-1); |
7e32c194 | 2595 | string.pointer += length-1; |
e71095e3 KS |
2596 | } |
2597 | ||
2598 | /* Scan the tag. */ | |
2599 | ||
625fcfe9 | 2600 | if (!CACHE(parser, 1)) goto error; |
e71095e3 KS |
2601 | |
2602 | /* | |
2603 | * The set of characters that may appear in URI is as follows: | |
2604 | * | |
2605 | * '0'-'9', 'A'-'Z', 'a'-'z', '_', '-', ';', '/', '?', ':', '@', '&', | |
2606 | * '=', '+', '$', ',', '.', '!', '~', '*', '\'', '(', ')', '[', ']', | |
2607 | * '%'. | |
2608 | */ | |
2609 | ||
e35af832 KS |
2610 | while (IS_ALPHA(parser->buffer) || CHECK(parser->buffer, ';') |
2611 | || CHECK(parser->buffer, '/') || CHECK(parser->buffer, '?') | |
2612 | || CHECK(parser->buffer, ':') || CHECK(parser->buffer, '@') | |
2613 | || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '=') | |
2614 | || CHECK(parser->buffer, '+') || CHECK(parser->buffer, '$') | |
2615 | || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '.') | |
2616 | || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '~') | |
2617 | || CHECK(parser->buffer, '*') || CHECK(parser->buffer, '\'') | |
2618 | || CHECK(parser->buffer, '(') || CHECK(parser->buffer, ')') | |
2619 | || CHECK(parser->buffer, '[') || CHECK(parser->buffer, ']') | |
2620 | || CHECK(parser->buffer, '%')) | |
e71095e3 | 2621 | { |
e71095e3 KS |
2622 | /* Check if it is a URI-escape sequence. */ |
2623 | ||
e35af832 | 2624 | if (CHECK(parser->buffer, '%')) { |
d1003a9d KS |
2625 | if (!STRING_EXTEND(parser, string)) |
2626 | goto error; | |
2627 | ||
e71095e3 KS |
2628 | if (!yaml_parser_scan_uri_escapes(parser, |
2629 | directive, start_mark, &string)) goto error; | |
2630 | } | |
2631 | else { | |
625fcfe9 | 2632 | if (!READ(parser, string)) goto error; |
e71095e3 KS |
2633 | } |
2634 | ||
2635 | length ++; | |
625fcfe9 | 2636 | if (!CACHE(parser, 1)) goto error; |
e71095e3 KS |
2637 | } |
2638 | ||
2639 | /* Check if the tag is non-empty. */ | |
2640 | ||
2641 | if (!length) { | |
625fcfe9 KS |
2642 | if (!STRING_EXTEND(parser, string)) |
2643 | goto error; | |
2644 | ||
e71095e3 KS |
2645 | yaml_parser_set_scanner_error(parser, directive ? |
2646 | "while parsing a %TAG directive" : "while parsing a tag", | |
2647 | start_mark, "did not find expected tag URI"); | |
2648 | goto error; | |
2649 | } | |
2650 | ||
625fcfe9 | 2651 | *uri = string.start; |
e71095e3 KS |
2652 | |
2653 | return 1; | |
2654 | ||
2655 | error: | |
625fcfe9 | 2656 | STRING_DEL(parser, string); |
e71095e3 KS |
2657 | return 0; |
2658 | } | |
2659 | ||
2660 | /* | |
2661 | * Decode an URI-escape sequence corresponding to a single UTF-8 character. | |
2662 | */ | |
2663 | ||
2664 | static int | |
2665 | yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive, | |
2666 | yaml_mark_t start_mark, yaml_string_t *string) | |
2667 | { | |
2668 | int width = 0; | |
2669 | ||
2670 | /* Decode the required number of characters. */ | |
2671 | ||
2672 | do { | |
2673 | ||
2674 | unsigned char octet = 0; | |
2675 | ||
2676 | /* Check for a URI-escaped octet. */ | |
2677 | ||
625fcfe9 | 2678 | if (!CACHE(parser, 3)) return 0; |
e71095e3 | 2679 | |
e35af832 KS |
2680 | if (!(CHECK(parser->buffer, '%') |
2681 | && IS_HEX_AT(parser->buffer, 1) | |
2682 | && IS_HEX_AT(parser->buffer, 2))) { | |
e71095e3 KS |
2683 | return yaml_parser_set_scanner_error(parser, directive ? |
2684 | "while parsing a %TAG directive" : "while parsing a tag", | |
2685 | start_mark, "did not find URI escaped octet"); | |
2686 | } | |
2687 | ||
2688 | /* Get the octet. */ | |
2689 | ||
e35af832 | 2690 | octet = (AS_HEX_AT(parser->buffer, 1) << 4) + AS_HEX_AT(parser->buffer, 2); |
e71095e3 KS |
2691 | |
2692 | /* If it is the leading octet, determine the length of the UTF-8 sequence. */ | |
2693 | ||
2694 | if (!width) | |
2695 | { | |
2696 | width = (octet & 0x80) == 0x00 ? 1 : | |
2697 | (octet & 0xE0) == 0xC0 ? 2 : | |
2698 | (octet & 0xF0) == 0xE0 ? 3 : | |
2699 | (octet & 0xF8) == 0xF0 ? 4 : 0; | |
2700 | if (!width) { | |
2701 | return yaml_parser_set_scanner_error(parser, directive ? | |
2702 | "while parsing a %TAG directive" : "while parsing a tag", | |
2703 | start_mark, "found an incorrect leading UTF-8 octet"); | |
2704 | } | |
2705 | } | |
2706 | else | |
2707 | { | |
2708 | /* Check if the trailing octet is correct. */ | |
2709 | ||
2710 | if ((octet & 0xC0) != 0x80) { | |
2711 | return yaml_parser_set_scanner_error(parser, directive ? | |
2712 | "while parsing a %TAG directive" : "while parsing a tag", | |
2713 | start_mark, "found an incorrect trailing UTF-8 octet"); | |
2714 | } | |
2715 | } | |
2716 | ||
2717 | /* Copy the octet and move the pointers. */ | |
2718 | ||
2719 | *(string->pointer++) = octet; | |
625fcfe9 KS |
2720 | SKIP(parser); |
2721 | SKIP(parser); | |
2722 | SKIP(parser); | |
e71095e3 KS |
2723 | |
2724 | } while (--width); | |
2725 | ||
2726 | return 1; | |
2727 | } | |
2728 | ||
92d41fe1 KS |
2729 | /* |
2730 | * Scan a block scalar. | |
2731 | */ | |
2732 | ||
625fcfe9 KS |
2733 | static int |
2734 | yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token, | |
2735 | int literal) | |
92d41fe1 KS |
2736 | { |
2737 | yaml_mark_t start_mark; | |
2738 | yaml_mark_t end_mark; | |
625fcfe9 KS |
2739 | yaml_string_t string = NULL_STRING; |
2740 | yaml_string_t leading_break = NULL_STRING; | |
2741 | yaml_string_t trailing_breaks = NULL_STRING; | |
92d41fe1 KS |
2742 | int chomping = 0; |
2743 | int increment = 0; | |
2744 | int indent = 0; | |
2745 | int leading_blank = 0; | |
2746 | int trailing_blank = 0; | |
2747 | ||
625fcfe9 KS |
2748 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
2749 | if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; | |
2750 | if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; | |
92d41fe1 KS |
2751 | |
2752 | /* Eat the indicator '|' or '>'. */ | |
2753 | ||
625fcfe9 | 2754 | start_mark = parser->mark; |
92d41fe1 | 2755 | |
625fcfe9 | 2756 | SKIP(parser); |
92d41fe1 KS |
2757 | |
2758 | /* Scan the additional block scalar indicators. */ | |
2759 | ||
625fcfe9 | 2760 | if (!CACHE(parser, 1)) goto error; |
92d41fe1 KS |
2761 | |
2762 | /* Check for a chomping indicator. */ | |
2763 | ||
e35af832 | 2764 | if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-')) |
92d41fe1 KS |
2765 | { |
2766 | /* Set the chomping method and eat the indicator. */ | |
2767 | ||
e35af832 | 2768 | chomping = CHECK(parser->buffer, '+') ? +1 : -1; |
92d41fe1 | 2769 | |
625fcfe9 | 2770 | SKIP(parser); |
92d41fe1 KS |
2771 | |
2772 | /* Check for an indentation indicator. */ | |
2773 | ||
625fcfe9 | 2774 | if (!CACHE(parser, 1)) goto error; |
92d41fe1 | 2775 | |
e35af832 | 2776 | if (IS_DIGIT(parser->buffer)) |
92d41fe1 | 2777 | { |
bdf4d192 | 2778 | /* Check that the indentation is greater than 0. */ |
92d41fe1 | 2779 | |
e35af832 | 2780 | if (CHECK(parser->buffer, '0')) { |
92d41fe1 | 2781 | yaml_parser_set_scanner_error(parser, "while scanning a block scalar", |
bdf4d192 | 2782 | start_mark, "found an indentation indicator equal to 0"); |
92d41fe1 KS |
2783 | goto error; |
2784 | } | |
2785 | ||
bdf4d192 | 2786 | /* Get the indentation level and eat the indicator. */ |
92d41fe1 | 2787 | |
e35af832 | 2788 | increment = AS_DIGIT(parser->buffer); |
92d41fe1 | 2789 | |
625fcfe9 | 2790 | SKIP(parser); |
92d41fe1 KS |
2791 | } |
2792 | } | |
2793 | ||
2794 | /* Do the same as above, but in the opposite order. */ | |
2795 | ||
e35af832 | 2796 | else if (IS_DIGIT(parser->buffer)) |
92d41fe1 | 2797 | { |
e35af832 | 2798 | if (CHECK(parser->buffer, '0')) { |
92d41fe1 | 2799 | yaml_parser_set_scanner_error(parser, "while scanning a block scalar", |
bdf4d192 | 2800 | start_mark, "found an indentation indicator equal to 0"); |
92d41fe1 KS |
2801 | goto error; |
2802 | } | |
2803 | ||
e35af832 | 2804 | increment = AS_DIGIT(parser->buffer); |
92d41fe1 | 2805 | |
625fcfe9 | 2806 | SKIP(parser); |
92d41fe1 | 2807 | |
625fcfe9 | 2808 | if (!CACHE(parser, 1)) goto error; |
92d41fe1 | 2809 | |
e35af832 KS |
2810 | if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-')) { |
2811 | chomping = CHECK(parser->buffer, '+') ? +1 : -1; | |
625fcfe9 KS |
2812 | |
2813 | SKIP(parser); | |
92d41fe1 KS |
2814 | } |
2815 | } | |
2816 | ||
2817 | /* Eat whitespaces and comments to the end of the line. */ | |
2818 | ||
625fcfe9 | 2819 | if (!CACHE(parser, 1)) goto error; |
92d41fe1 | 2820 | |
e35af832 | 2821 | while (IS_BLANK(parser->buffer)) { |
625fcfe9 KS |
2822 | SKIP(parser); |
2823 | if (!CACHE(parser, 1)) goto error; | |
92d41fe1 KS |
2824 | } |
2825 | ||
e35af832 KS |
2826 | if (CHECK(parser->buffer, '#')) { |
2827 | while (!IS_BREAKZ(parser->buffer)) { | |
625fcfe9 KS |
2828 | SKIP(parser); |
2829 | if (!CACHE(parser, 1)) goto error; | |
92d41fe1 KS |
2830 | } |
2831 | } | |
2832 | ||
2833 | /* Check if we are at the end of the line. */ | |
2834 | ||
e35af832 | 2835 | if (!IS_BREAKZ(parser->buffer)) { |
92d41fe1 | 2836 | yaml_parser_set_scanner_error(parser, "while scanning a block scalar", |
6be8109b | 2837 | start_mark, "did not find expected comment or line break"); |
92d41fe1 KS |
2838 | goto error; |
2839 | } | |
2840 | ||
2841 | /* Eat a line break. */ | |
2842 | ||
e35af832 | 2843 | if (IS_BREAK(parser->buffer)) { |
625fcfe9 KS |
2844 | if (!CACHE(parser, 2)) goto error; |
2845 | SKIP_LINE(parser); | |
92d41fe1 KS |
2846 | } |
2847 | ||
625fcfe9 | 2848 | end_mark = parser->mark; |
92d41fe1 | 2849 | |
bdf4d192 | 2850 | /* Set the indentation level if it was specified. */ |
92d41fe1 KS |
2851 | |
2852 | if (increment) { | |
2853 | indent = parser->indent >= 0 ? parser->indent+increment : increment; | |
2854 | } | |
2855 | ||
2856 | /* Scan the leading line breaks and determine the indentation level if needed. */ | |
2857 | ||
21fbedd4 | 2858 | if (!yaml_parser_scan_block_scalar_breaks(parser, &indent, &trailing_breaks, |
92d41fe1 KS |
2859 | start_mark, &end_mark)) goto error; |
2860 | ||
2861 | /* Scan the block scalar content. */ | |
2862 | ||
625fcfe9 | 2863 | if (!CACHE(parser, 1)) goto error; |
92d41fe1 | 2864 | |
0174ed6e | 2865 | while ((int)parser->mark.column == indent && !IS_Z(parser->buffer)) |
92d41fe1 KS |
2866 | { |
2867 | /* | |
2868 | * We are at the beginning of a non-empty line. | |
2869 | */ | |
2870 | ||
2871 | /* Is it a trailing whitespace? */ | |
2872 | ||
e35af832 | 2873 | trailing_blank = IS_BLANK(parser->buffer); |
92d41fe1 KS |
2874 | |
2875 | /* Check if we need to fold the leading line break. */ | |
2876 | ||
625fcfe9 | 2877 | if (!literal && (*leading_break.start == '\n') |
92d41fe1 KS |
2878 | && !leading_blank && !trailing_blank) |
2879 | { | |
2880 | /* Do we need to join the lines by space? */ | |
2881 | ||
625fcfe9 KS |
2882 | if (*trailing_breaks.start == '\0') { |
2883 | if (!STRING_EXTEND(parser, string)) goto error; | |
92d41fe1 KS |
2884 | *(string.pointer ++) = ' '; |
2885 | } | |
2886 | ||
625fcfe9 | 2887 | CLEAR(parser, leading_break); |
92d41fe1 KS |
2888 | } |
2889 | else { | |
21fbedd4 | 2890 | if (!JOIN(parser, string, leading_break)) goto error; |
625fcfe9 | 2891 | CLEAR(parser, leading_break); |
92d41fe1 KS |
2892 | } |
2893 | ||
2894 | /* Append the remaining line breaks. */ | |
2895 | ||
21fbedd4 | 2896 | if (!JOIN(parser, string, trailing_breaks)) goto error; |
625fcfe9 | 2897 | CLEAR(parser, trailing_breaks); |
92d41fe1 KS |
2898 | |
2899 | /* Is it a leading whitespace? */ | |
2900 | ||
e35af832 | 2901 | leading_blank = IS_BLANK(parser->buffer); |
92d41fe1 KS |
2902 | |
2903 | /* Consume the current line. */ | |
2904 | ||
e35af832 | 2905 | while (!IS_BREAKZ(parser->buffer)) { |
625fcfe9 KS |
2906 | if (!READ(parser, string)) goto error; |
2907 | if (!CACHE(parser, 1)) goto error; | |
92d41fe1 KS |
2908 | } |
2909 | ||
2910 | /* Consume the line break. */ | |
2911 | ||
625fcfe9 | 2912 | if (!CACHE(parser, 2)) goto error; |
92d41fe1 | 2913 | |
625fcfe9 | 2914 | if (!READ_LINE(parser, leading_break)) goto error; |
92d41fe1 | 2915 | |
bdf4d192 | 2916 | /* Eat the following indentation spaces and line breaks. */ |
92d41fe1 KS |
2917 | |
2918 | if (!yaml_parser_scan_block_scalar_breaks(parser, | |
21fbedd4 | 2919 | &indent, &trailing_breaks, start_mark, &end_mark)) goto error; |
92d41fe1 KS |
2920 | } |
2921 | ||
2922 | /* Chomp the tail. */ | |
2923 | ||
2924 | if (chomping != -1) { | |
21fbedd4 | 2925 | if (!JOIN(parser, string, leading_break)) goto error; |
92d41fe1 KS |
2926 | } |
2927 | if (chomping == 1) { | |
21fbedd4 | 2928 | if (!JOIN(parser, string, trailing_breaks)) goto error; |
92d41fe1 KS |
2929 | } |
2930 | ||
2931 | /* Create a token. */ | |
2932 | ||
625fcfe9 | 2933 | SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, |
92d41fe1 KS |
2934 | literal ? YAML_LITERAL_SCALAR_STYLE : YAML_FOLDED_SCALAR_STYLE, |
2935 | start_mark, end_mark); | |
92d41fe1 | 2936 | |
625fcfe9 KS |
2937 | STRING_DEL(parser, leading_break); |
2938 | STRING_DEL(parser, trailing_breaks); | |
92d41fe1 | 2939 | |
625fcfe9 | 2940 | return 1; |
92d41fe1 KS |
2941 | |
2942 | error: | |
625fcfe9 KS |
2943 | STRING_DEL(parser, string); |
2944 | STRING_DEL(parser, leading_break); | |
2945 | STRING_DEL(parser, trailing_breaks); | |
92d41fe1 | 2946 | |
625fcfe9 | 2947 | return 0; |
92d41fe1 KS |
2948 | } |
2949 | ||
2950 | /* | |
bdf4d192 SH |
2951 | * Scan indentation spaces and line breaks for a block scalar. Determine the |
2952 | * indentation level if needed. | |
92d41fe1 KS |
2953 | */ |
2954 | ||
2955 | static int | |
2956 | yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser, | |
2957 | int *indent, yaml_string_t *breaks, | |
2958 | yaml_mark_t start_mark, yaml_mark_t *end_mark) | |
2959 | { | |
2960 | int max_indent = 0; | |
2961 | ||
625fcfe9 | 2962 | *end_mark = parser->mark; |
92d41fe1 | 2963 | |
bdf4d192 | 2964 | /* Eat the indentation spaces and line breaks. */ |
92d41fe1 KS |
2965 | |
2966 | while (1) | |
2967 | { | |
bdf4d192 | 2968 | /* Eat the indentation spaces. */ |
92d41fe1 | 2969 | |
625fcfe9 | 2970 | if (!CACHE(parser, 1)) return 0; |
92d41fe1 | 2971 | |
0174ed6e | 2972 | while ((!*indent || (int)parser->mark.column < *indent) |
e35af832 | 2973 | && IS_SPACE(parser->buffer)) { |
625fcfe9 KS |
2974 | SKIP(parser); |
2975 | if (!CACHE(parser, 1)) return 0; | |
92d41fe1 KS |
2976 | } |
2977 | ||
0174ed6e KS |
2978 | if ((int)parser->mark.column > max_indent) |
2979 | max_indent = (int)parser->mark.column; | |
92d41fe1 | 2980 | |
bdf4d192 | 2981 | /* Check for a tab character messing the indentation. */ |
92d41fe1 | 2982 | |
0174ed6e | 2983 | if ((!*indent || (int)parser->mark.column < *indent) |
e35af832 | 2984 | && IS_TAB(parser->buffer)) { |
92d41fe1 | 2985 | return yaml_parser_set_scanner_error(parser, "while scanning a block scalar", |
bdf4d192 | 2986 | start_mark, "found a tab character where an indentation space is expected"); |
92d41fe1 KS |
2987 | } |
2988 | ||
2989 | /* Have we found a non-empty line? */ | |
2990 | ||
e35af832 | 2991 | if (!IS_BREAK(parser->buffer)) break; |
92d41fe1 KS |
2992 | |
2993 | /* Consume the line break. */ | |
2994 | ||
625fcfe9 KS |
2995 | if (!CACHE(parser, 2)) return 0; |
2996 | if (!READ_LINE(parser, *breaks)) return 0; | |
2997 | *end_mark = parser->mark; | |
92d41fe1 KS |
2998 | } |
2999 | ||
3000 | /* Determine the indentation level if needed. */ | |
3001 | ||
3002 | if (!*indent) { | |
3003 | *indent = max_indent; | |
3004 | if (*indent < parser->indent + 1) | |
3005 | *indent = parser->indent + 1; | |
3006 | if (*indent < 1) | |
3007 | *indent = 1; | |
3008 | } | |
3009 | ||
3010 | return 1; | |
3011 | } | |
3012 | ||
21fbedd4 KS |
3013 | /* |
3014 | * Scan a quoted scalar. | |
3015 | */ | |
3016 | ||
625fcfe9 KS |
3017 | static int |
3018 | yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token, | |
3019 | int single) | |
21fbedd4 KS |
3020 | { |
3021 | yaml_mark_t start_mark; | |
3022 | yaml_mark_t end_mark; | |
625fcfe9 KS |
3023 | yaml_string_t string = NULL_STRING; |
3024 | yaml_string_t leading_break = NULL_STRING; | |
3025 | yaml_string_t trailing_breaks = NULL_STRING; | |
3026 | yaml_string_t whitespaces = NULL_STRING; | |
21fbedd4 KS |
3027 | int leading_blanks; |
3028 | ||
625fcfe9 KS |
3029 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
3030 | if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; | |
3031 | if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; | |
3032 | if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error; | |
21fbedd4 KS |
3033 | |
3034 | /* Eat the left quote. */ | |
3035 | ||
625fcfe9 | 3036 | start_mark = parser->mark; |
21fbedd4 | 3037 | |
625fcfe9 | 3038 | SKIP(parser); |
21fbedd4 KS |
3039 | |
3040 | /* Consume the content of the quoted scalar. */ | |
3041 | ||
3042 | while (1) | |
3043 | { | |
3044 | /* Check that there are no document indicators at the beginning of the line. */ | |
3045 | ||
625fcfe9 | 3046 | if (!CACHE(parser, 4)) goto error; |
21fbedd4 | 3047 | |
625fcfe9 | 3048 | if (parser->mark.column == 0 && |
e35af832 KS |
3049 | ((CHECK_AT(parser->buffer, '-', 0) && |
3050 | CHECK_AT(parser->buffer, '-', 1) && | |
3051 | CHECK_AT(parser->buffer, '-', 2)) || | |
3052 | (CHECK_AT(parser->buffer, '.', 0) && | |
3053 | CHECK_AT(parser->buffer, '.', 1) && | |
3054 | CHECK_AT(parser->buffer, '.', 2))) && | |
3055 | IS_BLANKZ_AT(parser->buffer, 3)) | |
21fbedd4 KS |
3056 | { |
3057 | yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar", | |
3058 | start_mark, "found unexpected document indicator"); | |
3059 | goto error; | |
3060 | } | |
3061 | ||
3062 | /* Check for EOF. */ | |
3063 | ||
e35af832 | 3064 | if (IS_Z(parser->buffer)) { |
21fbedd4 KS |
3065 | yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar", |
3066 | start_mark, "found unexpected end of stream"); | |
3067 | goto error; | |
3068 | } | |
3069 | ||
3070 | /* Consume non-blank characters. */ | |
3071 | ||
625fcfe9 | 3072 | if (!CACHE(parser, 2)) goto error; |
21fbedd4 KS |
3073 | |
3074 | leading_blanks = 0; | |
3075 | ||
e35af832 | 3076 | while (!IS_BLANKZ(parser->buffer)) |
21fbedd4 KS |
3077 | { |
3078 | /* Check for an escaped single quote. */ | |
3079 | ||
e35af832 KS |
3080 | if (single && CHECK_AT(parser->buffer, '\'', 0) |
3081 | && CHECK_AT(parser->buffer, '\'', 1)) | |
21fbedd4 | 3082 | { |
625fcfe9 | 3083 | if (!STRING_EXTEND(parser, string)) goto error; |
21fbedd4 | 3084 | *(string.pointer++) = '\''; |
625fcfe9 KS |
3085 | SKIP(parser); |
3086 | SKIP(parser); | |
21fbedd4 KS |
3087 | } |
3088 | ||
3089 | /* Check for the right quote. */ | |
3090 | ||
e35af832 | 3091 | else if (CHECK(parser->buffer, single ? '\'' : '"')) |
21fbedd4 KS |
3092 | { |
3093 | break; | |
3094 | } | |
3095 | ||
3096 | /* Check for an escaped line break. */ | |
3097 | ||
e35af832 KS |
3098 | else if (!single && CHECK(parser->buffer, '\\') |
3099 | && IS_BREAK_AT(parser->buffer, 1)) | |
21fbedd4 | 3100 | { |
625fcfe9 KS |
3101 | if (!CACHE(parser, 3)) goto error; |
3102 | SKIP(parser); | |
3103 | SKIP_LINE(parser); | |
21fbedd4 KS |
3104 | leading_blanks = 1; |
3105 | break; | |
3106 | } | |
3107 | ||
3108 | /* Check for an escape sequence. */ | |
3109 | ||
e35af832 | 3110 | else if (!single && CHECK(parser->buffer, '\\')) |
21fbedd4 | 3111 | { |
0174ed6e | 3112 | size_t code_length = 0; |
21fbedd4 | 3113 | |
625fcfe9 KS |
3114 | if (!STRING_EXTEND(parser, string)) goto error; |
3115 | ||
21fbedd4 KS |
3116 | /* Check the escape character. */ |
3117 | ||
625fcfe9 | 3118 | switch (parser->buffer.pointer[1]) |
21fbedd4 KS |
3119 | { |
3120 | case '0': | |
3121 | *(string.pointer++) = '\0'; | |
3122 | break; | |
3123 | ||
3124 | case 'a': | |
3125 | *(string.pointer++) = '\x07'; | |
3126 | break; | |
3127 | ||
3128 | case 'b': | |
3129 | *(string.pointer++) = '\x08'; | |
3130 | break; | |
3131 | ||
3132 | case 't': | |
3133 | case '\t': | |
3134 | *(string.pointer++) = '\x09'; | |
3135 | break; | |
3136 | ||
3137 | case 'n': | |
3138 | *(string.pointer++) = '\x0A'; | |
3139 | break; | |
3140 | ||
3141 | case 'v': | |
3142 | *(string.pointer++) = '\x0B'; | |
3143 | break; | |
3144 | ||
3145 | case 'f': | |
3146 | *(string.pointer++) = '\x0C'; | |
3147 | break; | |
3148 | ||
3149 | case 'r': | |
3150 | *(string.pointer++) = '\x0D'; | |
3151 | break; | |
3152 | ||
3153 | case 'e': | |
3154 | *(string.pointer++) = '\x1B'; | |
3155 | break; | |
3156 | ||
3157 | case ' ': | |
3158 | *(string.pointer++) = '\x20'; | |
3159 | break; | |
3160 | ||
3161 | case '"': | |
3162 | *(string.pointer++) = '"'; | |
3163 | break; | |
3164 | ||
6db69c72 IN |
3165 | case '/': |
3166 | *(string.pointer++) = '/'; | |
3167 | break; | |
3168 | ||
21fbedd4 KS |
3169 | case '\'': |
3170 | *(string.pointer++) = '\''; | |
3171 | break; | |
3172 | ||
7e32c194 KS |
3173 | case '\\': |
3174 | *(string.pointer++) = '\\'; | |
3175 | break; | |
3176 | ||
21fbedd4 KS |
3177 | case 'N': /* NEL (#x85) */ |
3178 | *(string.pointer++) = '\xC2'; | |
3179 | *(string.pointer++) = '\x85'; | |
3180 | break; | |
3181 | ||
3182 | case '_': /* #xA0 */ | |
3183 | *(string.pointer++) = '\xC2'; | |
3184 | *(string.pointer++) = '\xA0'; | |
3185 | break; | |
3186 | ||
3187 | case 'L': /* LS (#x2028) */ | |
3188 | *(string.pointer++) = '\xE2'; | |
3189 | *(string.pointer++) = '\x80'; | |
3190 | *(string.pointer++) = '\xA8'; | |
3191 | break; | |
3192 | ||
3193 | case 'P': /* PS (#x2029) */ | |
3194 | *(string.pointer++) = '\xE2'; | |
3195 | *(string.pointer++) = '\x80'; | |
7e32c194 | 3196 | *(string.pointer++) = '\xA9'; |
21fbedd4 KS |
3197 | break; |
3198 | ||
3199 | case 'x': | |
3200 | code_length = 2; | |
3201 | break; | |
3202 | ||
3203 | case 'u': | |
3204 | code_length = 4; | |
3205 | break; | |
3206 | ||
3207 | case 'U': | |
3208 | code_length = 8; | |
3209 | break; | |
3210 | ||
3211 | default: | |
3212 | yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", | |
3213 | start_mark, "found unknown escape character"); | |
3214 | goto error; | |
3215 | } | |
3216 | ||
625fcfe9 KS |
3217 | SKIP(parser); |
3218 | SKIP(parser); | |
21fbedd4 KS |
3219 | |
3220 | /* Consume an arbitrary escape code. */ | |
3221 | ||
3222 | if (code_length) | |
3223 | { | |
3224 | unsigned int value = 0; | |
0174ed6e | 3225 | size_t k; |
21fbedd4 KS |
3226 | |
3227 | /* Scan the character value. */ | |
3228 | ||
625fcfe9 | 3229 | if (!CACHE(parser, code_length)) goto error; |
21fbedd4 KS |
3230 | |
3231 | for (k = 0; k < code_length; k ++) { | |
e35af832 | 3232 | if (!IS_HEX_AT(parser->buffer, k)) { |
21fbedd4 KS |
3233 | yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", |
3234 | start_mark, "did not find expected hexdecimal number"); | |
3235 | goto error; | |
3236 | } | |
e35af832 | 3237 | value = (value << 4) + AS_HEX_AT(parser->buffer, k); |
21fbedd4 KS |
3238 | } |
3239 | ||
3240 | /* Check the value and write the character. */ | |
3241 | ||
3242 | if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF) { | |
3243 | yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", | |
3244 | start_mark, "found invalid Unicode character escape code"); | |
3245 | goto error; | |
3246 | } | |
3247 | ||
3248 | if (value <= 0x7F) { | |
3249 | *(string.pointer++) = value; | |
3250 | } | |
3251 | else if (value <= 0x7FF) { | |
3252 | *(string.pointer++) = 0xC0 + (value >> 6); | |
3253 | *(string.pointer++) = 0x80 + (value & 0x3F); | |
3254 | } | |
3255 | else if (value <= 0xFFFF) { | |
3256 | *(string.pointer++) = 0xE0 + (value >> 12); | |
3257 | *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F); | |
3258 | *(string.pointer++) = 0x80 + (value & 0x3F); | |
3259 | } | |
3260 | else { | |
3261 | *(string.pointer++) = 0xF0 + (value >> 18); | |
3262 | *(string.pointer++) = 0x80 + ((value >> 12) & 0x3F); | |
3263 | *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F); | |
3264 | *(string.pointer++) = 0x80 + (value & 0x3F); | |
3265 | } | |
3266 | ||
3267 | /* Advance the pointer. */ | |
3268 | ||
3269 | for (k = 0; k < code_length; k ++) { | |
625fcfe9 | 3270 | SKIP(parser); |
21fbedd4 KS |
3271 | } |
3272 | } | |
3273 | } | |
3274 | ||
3275 | else | |
3276 | { | |
3277 | /* It is a non-escaped non-blank character. */ | |
3278 | ||
625fcfe9 | 3279 | if (!READ(parser, string)) goto error; |
21fbedd4 KS |
3280 | } |
3281 | ||
625fcfe9 | 3282 | if (!CACHE(parser, 2)) goto error; |
21fbedd4 KS |
3283 | } |
3284 | ||
3285 | /* Check if we are at the end of the scalar. */ | |
3286 | ||
e35af832 | 3287 | if (CHECK(parser->buffer, single ? '\'' : '"')) |
21fbedd4 KS |
3288 | break; |
3289 | ||
3290 | /* Consume blank characters. */ | |
3291 | ||
625fcfe9 | 3292 | if (!CACHE(parser, 1)) goto error; |
21fbedd4 | 3293 | |
e35af832 | 3294 | while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer)) |
21fbedd4 | 3295 | { |
e35af832 | 3296 | if (IS_BLANK(parser->buffer)) |
21fbedd4 KS |
3297 | { |
3298 | /* Consume a space or a tab character. */ | |
3299 | ||
3300 | if (!leading_blanks) { | |
625fcfe9 | 3301 | if (!READ(parser, whitespaces)) goto error; |
21fbedd4 | 3302 | } |
7e32c194 | 3303 | else { |
625fcfe9 | 3304 | SKIP(parser); |
7e32c194 | 3305 | } |
21fbedd4 KS |
3306 | } |
3307 | else | |
3308 | { | |
625fcfe9 | 3309 | if (!CACHE(parser, 2)) goto error; |
21fbedd4 KS |
3310 | |
3311 | /* Check if it is a first line break. */ | |
3312 | ||
3313 | if (!leading_blanks) | |
3314 | { | |
625fcfe9 KS |
3315 | CLEAR(parser, whitespaces); |
3316 | if (!READ_LINE(parser, leading_break)) goto error; | |
21fbedd4 KS |
3317 | leading_blanks = 1; |
3318 | } | |
3319 | else | |
3320 | { | |
625fcfe9 | 3321 | if (!READ_LINE(parser, trailing_breaks)) goto error; |
21fbedd4 KS |
3322 | } |
3323 | } | |
625fcfe9 | 3324 | if (!CACHE(parser, 1)) goto error; |
21fbedd4 KS |
3325 | } |
3326 | ||
3327 | /* Join the whitespaces or fold line breaks. */ | |
3328 | ||
21fbedd4 KS |
3329 | if (leading_blanks) |
3330 | { | |
3331 | /* Do we need to fold line breaks? */ | |
3332 | ||
625fcfe9 KS |
3333 | if (leading_break.start[0] == '\n') { |
3334 | if (trailing_breaks.start[0] == '\0') { | |
3335 | if (!STRING_EXTEND(parser, string)) goto error; | |
21fbedd4 KS |
3336 | *(string.pointer++) = ' '; |
3337 | } | |
3338 | else { | |
3339 | if (!JOIN(parser, string, trailing_breaks)) goto error; | |
625fcfe9 | 3340 | CLEAR(parser, trailing_breaks); |
21fbedd4 | 3341 | } |
625fcfe9 | 3342 | CLEAR(parser, leading_break); |
21fbedd4 KS |
3343 | } |
3344 | else { | |
3345 | if (!JOIN(parser, string, leading_break)) goto error; | |
3346 | if (!JOIN(parser, string, trailing_breaks)) goto error; | |
625fcfe9 KS |
3347 | CLEAR(parser, leading_break); |
3348 | CLEAR(parser, trailing_breaks); | |
21fbedd4 KS |
3349 | } |
3350 | } | |
3351 | else | |
3352 | { | |
3353 | if (!JOIN(parser, string, whitespaces)) goto error; | |
625fcfe9 | 3354 | CLEAR(parser, whitespaces); |
21fbedd4 KS |
3355 | } |
3356 | } | |
3357 | ||
3358 | /* Eat the right quote. */ | |
3359 | ||
625fcfe9 | 3360 | SKIP(parser); |
21fbedd4 | 3361 | |
625fcfe9 | 3362 | end_mark = parser->mark; |
21fbedd4 KS |
3363 | |
3364 | /* Create a token. */ | |
3365 | ||
625fcfe9 | 3366 | SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, |
21fbedd4 KS |
3367 | single ? YAML_SINGLE_QUOTED_SCALAR_STYLE : YAML_DOUBLE_QUOTED_SCALAR_STYLE, |
3368 | start_mark, end_mark); | |
21fbedd4 | 3369 | |
625fcfe9 KS |
3370 | STRING_DEL(parser, leading_break); |
3371 | STRING_DEL(parser, trailing_breaks); | |
3372 | STRING_DEL(parser, whitespaces); | |
21fbedd4 | 3373 | |
625fcfe9 | 3374 | return 1; |
21fbedd4 KS |
3375 | |
3376 | error: | |
625fcfe9 KS |
3377 | STRING_DEL(parser, string); |
3378 | STRING_DEL(parser, leading_break); | |
3379 | STRING_DEL(parser, trailing_breaks); | |
3380 | STRING_DEL(parser, whitespaces); | |
21fbedd4 | 3381 | |
625fcfe9 | 3382 | return 0; |
21fbedd4 KS |
3383 | } |
3384 | ||
3385 | /* | |
3386 | * Scan a plain scalar. | |
3387 | */ | |
3388 | ||
625fcfe9 KS |
3389 | static int |
3390 | yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token) | |
21fbedd4 KS |
3391 | { |
3392 | yaml_mark_t start_mark; | |
3393 | yaml_mark_t end_mark; | |
625fcfe9 KS |
3394 | yaml_string_t string = NULL_STRING; |
3395 | yaml_string_t leading_break = NULL_STRING; | |
3396 | yaml_string_t trailing_breaks = NULL_STRING; | |
3397 | yaml_string_t whitespaces = NULL_STRING; | |
21fbedd4 KS |
3398 | int leading_blanks = 0; |
3399 | int indent = parser->indent+1; | |
3400 | ||
625fcfe9 KS |
3401 | if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; |
3402 | if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; | |
3403 | if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; | |
3404 | if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error; | |
21fbedd4 | 3405 | |
54815ffd | 3406 | start_mark = end_mark = parser->mark; |
21fbedd4 KS |
3407 | |
3408 | /* Consume the content of the plain scalar. */ | |
3409 | ||
3410 | while (1) | |
3411 | { | |
3412 | /* Check for a document indicator. */ | |
3413 | ||
625fcfe9 | 3414 | if (!CACHE(parser, 4)) goto error; |
21fbedd4 | 3415 | |
625fcfe9 | 3416 | if (parser->mark.column == 0 && |
e35af832 KS |
3417 | ((CHECK_AT(parser->buffer, '-', 0) && |
3418 | CHECK_AT(parser->buffer, '-', 1) && | |
3419 | CHECK_AT(parser->buffer, '-', 2)) || | |
3420 | (CHECK_AT(parser->buffer, '.', 0) && | |
3421 | CHECK_AT(parser->buffer, '.', 1) && | |
3422 | CHECK_AT(parser->buffer, '.', 2))) && | |
3423 | IS_BLANKZ_AT(parser->buffer, 3)) break; | |
21fbedd4 KS |
3424 | |
3425 | /* Check for a comment. */ | |
3426 | ||
e35af832 | 3427 | if (CHECK(parser->buffer, '#')) |
21fbedd4 KS |
3428 | break; |
3429 | ||
3430 | /* Consume non-blank characters. */ | |
3431 | ||
e35af832 | 3432 | while (!IS_BLANKZ(parser->buffer)) |
21fbedd4 | 3433 | { |
7e32c194 | 3434 | /* Check for 'x:x' in the flow context. TODO: Fix the test "spec-08-13". */ |
21fbedd4 | 3435 | |
e35af832 KS |
3436 | if (parser->flow_level |
3437 | && CHECK(parser->buffer, ':') | |
3438 | && !IS_BLANKZ_AT(parser->buffer, 1)) { | |
21fbedd4 KS |
3439 | yaml_parser_set_scanner_error(parser, "while scanning a plain scalar", |
3440 | start_mark, "found unexpected ':'"); | |
3441 | goto error; | |
3442 | } | |
3443 | ||
3444 | /* Check for indicators that may end a plain scalar. */ | |
3445 | ||
e35af832 KS |
3446 | if ((CHECK(parser->buffer, ':') && IS_BLANKZ_AT(parser->buffer, 1)) |
3447 | || (parser->flow_level && | |
3448 | (CHECK(parser->buffer, ',') || CHECK(parser->buffer, ':') | |
3449 | || CHECK(parser->buffer, '?') || CHECK(parser->buffer, '[') | |
3450 | || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{') | |
3451 | || CHECK(parser->buffer, '}')))) | |
21fbedd4 KS |
3452 | break; |
3453 | ||
3454 | /* Check if we need to join whitespaces and breaks. */ | |
3455 | ||
625fcfe9 | 3456 | if (leading_blanks || whitespaces.start != whitespaces.pointer) |
21fbedd4 | 3457 | { |
21fbedd4 KS |
3458 | if (leading_blanks) |
3459 | { | |
3460 | /* Do we need to fold line breaks? */ | |
3461 | ||
625fcfe9 KS |
3462 | if (leading_break.start[0] == '\n') { |
3463 | if (trailing_breaks.start[0] == '\0') { | |
3464 | if (!STRING_EXTEND(parser, string)) goto error; | |
21fbedd4 KS |
3465 | *(string.pointer++) = ' '; |
3466 | } | |
3467 | else { | |
3468 | if (!JOIN(parser, string, trailing_breaks)) goto error; | |
625fcfe9 | 3469 | CLEAR(parser, trailing_breaks); |
21fbedd4 | 3470 | } |
625fcfe9 | 3471 | CLEAR(parser, leading_break); |
21fbedd4 KS |
3472 | } |
3473 | else { | |
3474 | if (!JOIN(parser, string, leading_break)) goto error; | |
3475 | if (!JOIN(parser, string, trailing_breaks)) goto error; | |
625fcfe9 KS |
3476 | CLEAR(parser, leading_break); |
3477 | CLEAR(parser, trailing_breaks); | |
21fbedd4 KS |
3478 | } |
3479 | ||
3480 | leading_blanks = 0; | |
3481 | } | |
3482 | else | |
3483 | { | |
3484 | if (!JOIN(parser, string, whitespaces)) goto error; | |
625fcfe9 | 3485 | CLEAR(parser, whitespaces); |
21fbedd4 KS |
3486 | } |
3487 | } | |
3488 | ||
3489 | /* Copy the character. */ | |
3490 | ||
625fcfe9 | 3491 | if (!READ(parser, string)) goto error; |
21fbedd4 | 3492 | |
625fcfe9 | 3493 | end_mark = parser->mark; |
21fbedd4 | 3494 | |
625fcfe9 | 3495 | if (!CACHE(parser, 2)) goto error; |
21fbedd4 KS |
3496 | } |
3497 | ||
3498 | /* Is it the end? */ | |
3499 | ||
e35af832 | 3500 | if (!(IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer))) |
21fbedd4 KS |
3501 | break; |
3502 | ||
3503 | /* Consume blank characters. */ | |
3504 | ||
625fcfe9 | 3505 | if (!CACHE(parser, 1)) goto error; |
21fbedd4 | 3506 | |
e35af832 | 3507 | while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer)) |
21fbedd4 | 3508 | { |
e35af832 | 3509 | if (IS_BLANK(parser->buffer)) |
21fbedd4 | 3510 | { |
bdf4d192 | 3511 | /* Check for tab character that abuse indentation. */ |
21fbedd4 | 3512 | |
0174ed6e | 3513 | if (leading_blanks && (int)parser->mark.column < indent |
e35af832 | 3514 | && IS_TAB(parser->buffer)) { |
21fbedd4 | 3515 | yaml_parser_set_scanner_error(parser, "while scanning a plain scalar", |
bdf4d192 | 3516 | start_mark, "found a tab character that violate indentation"); |
7e32c194 | 3517 | goto error; |
21fbedd4 KS |
3518 | } |
3519 | ||
3520 | /* Consume a space or a tab character. */ | |
3521 | ||
3522 | if (!leading_blanks) { | |
625fcfe9 | 3523 | if (!READ(parser, whitespaces)) goto error; |
21fbedd4 | 3524 | } |
7e32c194 | 3525 | else { |
625fcfe9 | 3526 | SKIP(parser); |
7e32c194 | 3527 | } |
21fbedd4 KS |
3528 | } |
3529 | else | |
3530 | { | |
625fcfe9 | 3531 | if (!CACHE(parser, 2)) goto error; |
21fbedd4 KS |
3532 | |
3533 | /* Check if it is a first line break. */ | |
3534 | ||
3535 | if (!leading_blanks) | |
3536 | { | |
625fcfe9 KS |
3537 | CLEAR(parser, whitespaces); |
3538 | if (!READ_LINE(parser, leading_break)) goto error; | |
21fbedd4 KS |
3539 | leading_blanks = 1; |
3540 | } | |
3541 | else | |
3542 | { | |
625fcfe9 | 3543 | if (!READ_LINE(parser, trailing_breaks)) goto error; |
21fbedd4 KS |
3544 | } |
3545 | } | |
625fcfe9 | 3546 | if (!CACHE(parser, 1)) goto error; |
21fbedd4 KS |
3547 | } |
3548 | ||
bdf4d192 | 3549 | /* Check indentation level. */ |
21fbedd4 | 3550 | |
0174ed6e | 3551 | if (!parser->flow_level && (int)parser->mark.column < indent) |
21fbedd4 KS |
3552 | break; |
3553 | } | |
3554 | ||
3555 | /* Create a token. */ | |
3556 | ||
625fcfe9 | 3557 | SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, |
21fbedd4 | 3558 | YAML_PLAIN_SCALAR_STYLE, start_mark, end_mark); |
21fbedd4 KS |
3559 | |
3560 | /* Note that we change the 'simple_key_allowed' flag. */ | |
3561 | ||
3562 | if (leading_blanks) { | |
3563 | parser->simple_key_allowed = 1; | |
3564 | } | |
3565 | ||
625fcfe9 KS |
3566 | STRING_DEL(parser, leading_break); |
3567 | STRING_DEL(parser, trailing_breaks); | |
3568 | STRING_DEL(parser, whitespaces); | |
21fbedd4 | 3569 | |
625fcfe9 | 3570 | return 1; |
21fbedd4 KS |
3571 | |
3572 | error: | |
625fcfe9 KS |
3573 | STRING_DEL(parser, string); |
3574 | STRING_DEL(parser, leading_break); | |
3575 | STRING_DEL(parser, trailing_breaks); | |
3576 | STRING_DEL(parser, whitespaces); | |
21fbedd4 | 3577 | |
625fcfe9 | 3578 | return 0; |
21fbedd4 KS |
3579 | } |
3580 |