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8bd04432 PP |
1 | /* |
2 | * Copyright 2016-2019 Philippe Proulx <pproulx@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
7c7301d5 SM |
23 | #include "param-parse.h" |
24 | ||
8bd04432 PP |
25 | #include <errno.h> |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include "common/assert.h" | |
29 | #include <stdio.h> | |
30 | #include <stdbool.h> | |
31 | #include <inttypes.h> | |
32 | #include <babeltrace2/babeltrace.h> | |
33 | #include "common/common.h" | |
8bd04432 PP |
34 | #include <glib.h> |
35 | #include <sys/types.h> | |
8bd04432 PP |
36 | |
37 | /* INI-style parsing FSM states */ | |
38 | enum ini_parsing_fsm_state { | |
39 | /* Expect a map key (identifier) */ | |
40 | INI_EXPECT_MAP_KEY, | |
41 | ||
42 | /* Expect an equal character (`=`) */ | |
43 | INI_EXPECT_EQUAL, | |
44 | ||
45 | /* Expect a value */ | |
46 | INI_EXPECT_VALUE, | |
47 | ||
48 | /* Expect a comma character (`,`) */ | |
49 | INI_EXPECT_COMMA, | |
50 | }; | |
51 | ||
52 | /* INI-style parsing state variables */ | |
53 | struct ini_parsing_state { | |
54 | /* Lexical scanner (owned by this) */ | |
55 | GScanner *scanner; | |
56 | ||
57 | /* Output map value object being filled (owned by this) */ | |
58 | bt_value *params; | |
59 | ||
60 | /* Next expected FSM state */ | |
61 | enum ini_parsing_fsm_state expecting; | |
62 | ||
63 | /* Last decoded map key (owned by this) */ | |
64 | GString *last_map_key; | |
65 | ||
66 | /* Complete INI-style string to parse */ | |
67 | const char *arg; | |
68 | ||
69 | /* Error buffer (weak) */ | |
70 | GString *ini_error; | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Appends an "expecting token" error to the INI-style parsing state's | |
75 | * error buffer. | |
76 | */ | |
77 | static | |
78 | void ini_append_error_expecting(struct ini_parsing_state *state, | |
79 | GScanner *scanner, const char *expecting) | |
80 | { | |
81 | size_t i; | |
82 | size_t pos; | |
83 | ||
84 | g_string_append_printf(state->ini_error, "Expecting %s:\n", expecting); | |
85 | ||
86 | /* Only append error if there's one line */ | |
5084732e | 87 | if (strchr(state->arg, '\n') || strlen(state->arg) == 0) { |
8bd04432 PP |
88 | return; |
89 | } | |
90 | ||
91 | g_string_append_printf(state->ini_error, "\n %s\n", state->arg); | |
92 | pos = g_scanner_cur_position(scanner) + 4; | |
93 | ||
94 | if (!g_scanner_eof(scanner)) { | |
95 | pos--; | |
96 | } | |
97 | ||
98 | for (i = 0; i < pos; ++i) { | |
99 | g_string_append_printf(state->ini_error, " "); | |
100 | } | |
101 | ||
102 | g_string_append_printf(state->ini_error, "^\n\n"); | |
103 | } | |
104 | ||
105 | static | |
106 | void ini_append_oom_error(GString *error) | |
107 | { | |
108 | BT_ASSERT(error); | |
109 | g_string_append(error, "Out of memory\n"); | |
110 | } | |
111 | ||
112 | /* | |
113 | * Parses the next token as an unsigned integer. | |
114 | */ | |
115 | static | |
116 | bt_value *ini_parse_uint(struct ini_parsing_state *state) | |
117 | { | |
118 | bt_value *value = NULL; | |
119 | GTokenType token_type = g_scanner_get_next_token(state->scanner); | |
120 | ||
121 | if (token_type != G_TOKEN_INT) { | |
122 | ini_append_error_expecting(state, state->scanner, | |
123 | "integer value"); | |
124 | goto end; | |
125 | } | |
126 | ||
9c08c816 | 127 | value = bt_value_integer_unsigned_create_init( |
8bd04432 PP |
128 | state->scanner->value.v_int64); |
129 | ||
130 | end: | |
131 | return value; | |
132 | } | |
133 | ||
134 | /* | |
135 | * Parses the next token as a number and returns its negation. | |
136 | */ | |
137 | static | |
138 | bt_value *ini_parse_neg_number(struct ini_parsing_state *state) | |
139 | { | |
140 | bt_value *value = NULL; | |
141 | GTokenType token_type = g_scanner_get_next_token(state->scanner); | |
142 | ||
143 | switch (token_type) { | |
144 | case G_TOKEN_INT: | |
145 | { | |
146 | /* Negative integer */ | |
147 | uint64_t int_val = state->scanner->value.v_int64; | |
148 | ||
149 | if (int_val > (((uint64_t) INT64_MAX) + 1)) { | |
150 | g_string_append_printf(state->ini_error, | |
151 | "Integer value -%" PRIu64 " is outside the range of a 64-bit signed integer\n", | |
152 | int_val); | |
153 | } else { | |
9c08c816 | 154 | value = bt_value_integer_signed_create_init( |
8bd04432 PP |
155 | -((int64_t) int_val)); |
156 | } | |
157 | ||
158 | break; | |
159 | } | |
160 | case G_TOKEN_FLOAT: | |
161 | /* Negative floating point number */ | |
162 | value = bt_value_real_create_init( | |
163 | -state->scanner->value.v_float); | |
164 | break; | |
165 | default: | |
166 | ini_append_error_expecting(state, state->scanner, "value"); | |
167 | break; | |
168 | } | |
169 | ||
170 | return value; | |
171 | } | |
172 | ||
173 | static bt_value *ini_parse_value(struct ini_parsing_state *state); | |
174 | ||
175 | /* | |
176 | * Parses the current and following tokens as an array. Arrays are | |
177 | * formatted as an opening `[`, a list of comma-separated values, and a | |
178 | * closing `]`. For convenience, this function supports an optional | |
179 | * trailing comma after the last value. | |
180 | * | |
181 | * The current token of the parser must be the opening square bracket | |
182 | * (`[`) of the array. | |
183 | */ | |
184 | static | |
185 | bt_value *ini_parse_array(struct ini_parsing_state *state) | |
186 | { | |
187 | bt_value *array_value; | |
188 | GTokenType token_type; | |
189 | ||
190 | /* The `[` character must have already been ingested */ | |
191 | BT_ASSERT(g_scanner_cur_token(state->scanner) == G_TOKEN_CHAR); | |
192 | BT_ASSERT(g_scanner_cur_value(state->scanner).v_char == '['); | |
193 | ||
194 | array_value = bt_value_array_create (); | |
195 | if (!array_value) { | |
196 | ini_append_oom_error(state->ini_error); | |
197 | goto error; | |
198 | } | |
199 | ||
200 | token_type = g_scanner_get_next_token(state->scanner); | |
201 | ||
202 | /* While the current token is not a `]` */ | |
203 | while (!(token_type == G_TOKEN_CHAR && | |
204 | g_scanner_cur_value(state->scanner).v_char == ']')) { | |
205 | bt_value *item_value; | |
206 | bt_value_array_append_element_status append_status; | |
207 | ||
208 | /* Parse the item... */ | |
209 | item_value = ini_parse_value(state); | |
210 | if (!item_value) { | |
211 | goto error; | |
212 | } | |
213 | ||
214 | /* ... and add it to the result array */ | |
215 | append_status = bt_value_array_append_element(array_value, | |
216 | item_value); | |
217 | BT_VALUE_PUT_REF_AND_RESET(item_value); | |
218 | if (append_status < 0) { | |
219 | goto error; | |
220 | } | |
221 | ||
222 | /* | |
223 | * Ingest the token following the value. It should be | |
224 | * either a comma or closing square bracket. | |
225 | */ | |
226 | token_type = g_scanner_get_next_token(state->scanner); | |
227 | if (token_type == G_TOKEN_CHAR && | |
228 | g_scanner_cur_value(state->scanner).v_char == ',') { | |
229 | /* | |
230 | * Ingest the token following the comma. If it | |
231 | * happens to be a closing square bracket, exit | |
232 | * the loop and we are done (we allow trailing | |
233 | * commas). Otherwise, we are ready for the next | |
234 | * ini_parse_value() call. | |
235 | */ | |
236 | token_type = g_scanner_get_next_token(state->scanner); | |
237 | } else if (token_type != G_TOKEN_CHAR || | |
238 | g_scanner_cur_value(state->scanner).v_char != ']') { | |
239 | ini_append_error_expecting(state, state->scanner, | |
240 | "`,` or `]`"); | |
241 | goto error; | |
242 | } | |
243 | } | |
244 | ||
245 | goto end; | |
246 | ||
247 | error: | |
248 | BT_VALUE_PUT_REF_AND_RESET(array_value); | |
249 | ||
250 | end: | |
251 | return array_value; | |
252 | } | |
253 | ||
3971c701 SM |
254 | /* |
255 | * Parses the current and following tokens as a map. Maps are | |
256 | * formatted as an opening `{`, a list of comma-separated entries, and a | |
257 | * closing `}`. And entry is a key (an unquoted string), an equal sign and | |
258 | * a value. For convenience, this function supports an optional trailing comma | |
259 | * after the last value. | |
260 | * | |
261 | * The current token of the parser must be the opening curly bracket | |
262 | * (`{`) of the array. | |
263 | */ | |
264 | static | |
265 | bt_value *ini_parse_map(struct ini_parsing_state *state) | |
266 | { | |
267 | bt_value *map_value; | |
268 | GTokenType token_type; | |
269 | gchar *key = NULL; | |
270 | ||
271 | /* The `{` character must have already been ingested */ | |
272 | BT_ASSERT(g_scanner_cur_token(state->scanner) == G_TOKEN_CHAR); | |
273 | BT_ASSERT(g_scanner_cur_value(state->scanner).v_char == '{'); | |
274 | ||
275 | map_value = bt_value_map_create (); | |
276 | if (!map_value) { | |
277 | ini_append_oom_error(state->ini_error); | |
278 | goto error; | |
279 | } | |
280 | ||
281 | token_type = g_scanner_get_next_token(state->scanner); | |
282 | ||
283 | /* While the current token is not a `}` */ | |
284 | while (!(token_type == G_TOKEN_CHAR && | |
285 | g_scanner_cur_value(state->scanner).v_char == '}')) { | |
286 | bt_value *entry_value; | |
287 | bt_value_map_insert_entry_status insert_entry_status; | |
288 | ||
289 | /* Expect map key. */ | |
290 | if (token_type != G_TOKEN_IDENTIFIER) { | |
291 | ini_append_error_expecting(state, state->scanner, | |
292 | "unquoted map key"); | |
293 | goto error; | |
294 | } | |
295 | ||
296 | g_free(key); | |
297 | key = g_strdup(g_scanner_cur_value(state->scanner).v_identifier); | |
298 | ||
299 | token_type = g_scanner_get_next_token(state->scanner); | |
300 | ||
301 | /* Expect equal sign. */ | |
302 | if (token_type != G_TOKEN_CHAR || | |
303 | g_scanner_cur_value(state->scanner).v_char != '=') { | |
304 | ini_append_error_expecting(state, | |
305 | state->scanner, "'='"); | |
306 | goto error; | |
307 | } | |
308 | ||
309 | token_type = g_scanner_get_next_token(state->scanner); | |
310 | ||
311 | /* Parse the entry value... */ | |
312 | entry_value = ini_parse_value(state); | |
313 | if (!entry_value) { | |
314 | goto error; | |
315 | } | |
316 | ||
317 | /* ... and add it to the result map */ | |
318 | insert_entry_status = | |
319 | bt_value_map_insert_entry(map_value, key, entry_value); | |
320 | BT_VALUE_PUT_REF_AND_RESET(entry_value); | |
321 | if (insert_entry_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
322 | goto error; | |
323 | } | |
324 | ||
325 | /* | |
326 | * Ingest the token following the value. It should be | |
327 | * either a comma or closing curly bracket. | |
328 | */ | |
329 | token_type = g_scanner_get_next_token(state->scanner); | |
330 | if (token_type == G_TOKEN_CHAR && | |
331 | g_scanner_cur_value(state->scanner).v_char == ',') { | |
332 | /* | |
333 | * Ingest the token following the comma. If it | |
334 | * happens to be a closing curly bracket, exit | |
335 | * the loop and we are done (we allow trailing | |
336 | * commas). Otherwise, we are ready for the next | |
337 | * ini_parse_value() call. | |
338 | */ | |
339 | token_type = g_scanner_get_next_token(state->scanner); | |
340 | } else if (token_type != G_TOKEN_CHAR || | |
341 | g_scanner_cur_value(state->scanner).v_char != '}') { | |
342 | ini_append_error_expecting(state, state->scanner, | |
343 | "`,` or `}`"); | |
344 | goto error; | |
345 | } | |
346 | } | |
347 | ||
348 | goto end; | |
349 | error: | |
350 | BT_VALUE_PUT_REF_AND_RESET(map_value); | |
351 | ||
352 | end: | |
353 | g_free(key); | |
354 | ||
355 | return map_value; | |
356 | } | |
357 | ||
8bd04432 PP |
358 | /* |
359 | * Parses the current token (and the following ones if needed) as a | |
360 | * value, returning it as a `bt_value *`. | |
361 | */ | |
362 | static | |
363 | bt_value *ini_parse_value(struct ini_parsing_state *state) | |
364 | { | |
365 | bt_value *value = NULL; | |
366 | GTokenType token_type = state->scanner->token; | |
367 | ||
368 | switch (token_type) { | |
369 | case G_TOKEN_CHAR: | |
370 | if (state->scanner->value.v_char == '-') { | |
371 | /* Negative number */ | |
372 | value = ini_parse_neg_number(state); | |
373 | } else if (state->scanner->value.v_char == '+') { | |
374 | /* Unsigned integer */ | |
375 | value = ini_parse_uint(state); | |
376 | } else if (state->scanner->value.v_char == '[') { | |
377 | /* Array */ | |
378 | value = ini_parse_array(state); | |
3971c701 SM |
379 | } else if (state->scanner->value.v_char == '{') { |
380 | /* Map */ | |
381 | value = ini_parse_map(state); | |
8bd04432 PP |
382 | } else { |
383 | ini_append_error_expecting(state, state->scanner, "value"); | |
384 | goto end; | |
385 | } | |
386 | ||
387 | break; | |
388 | case G_TOKEN_INT: | |
389 | { | |
390 | /* Positive, signed integer */ | |
391 | uint64_t int_val = state->scanner->value.v_int64; | |
392 | ||
393 | if (int_val > INT64_MAX) { | |
394 | g_string_append_printf(state->ini_error, | |
395 | "Integer value %" PRIu64 " is outside the range of a 64-bit signed integer\n", | |
396 | int_val); | |
397 | goto end; | |
398 | } else { | |
9c08c816 | 399 | value = bt_value_integer_signed_create_init( |
8bd04432 PP |
400 | (int64_t) int_val); |
401 | } | |
402 | ||
403 | break; | |
404 | } | |
405 | case G_TOKEN_FLOAT: | |
406 | /* Positive floating point number */ | |
407 | value = bt_value_real_create_init(state->scanner->value.v_float); | |
408 | break; | |
409 | case G_TOKEN_STRING: | |
410 | /* Quoted string */ | |
411 | value = bt_value_string_create_init(state->scanner->value.v_string); | |
412 | break; | |
413 | case G_TOKEN_IDENTIFIER: | |
414 | { | |
415 | /* | |
416 | * Using symbols would be appropriate here, but said | |
417 | * symbols are allowed as map key, so it's easier to | |
418 | * consider everything an identifier. | |
419 | * | |
420 | * If one of the known symbols is not recognized here, | |
421 | * then fall back to creating a string value. | |
422 | */ | |
423 | const char *id = state->scanner->value.v_identifier; | |
424 | ||
2242b43d PP |
425 | if (strcmp(id, "null") == 0 || strcmp(id, "NULL") == 0 || |
426 | strcmp(id, "nul") == 0) { | |
8bd04432 | 427 | value = bt_value_null; |
4778a6c9 | 428 | bt_value_get_ref(value); |
2242b43d PP |
429 | } else if (strcmp(id, "true") == 0 || strcmp(id, "TRUE") == 0 || |
430 | strcmp(id, "yes") == 0 || | |
431 | strcmp(id, "YES") == 0) { | |
8bd04432 | 432 | value = bt_value_bool_create_init(true); |
2242b43d PP |
433 | } else if (strcmp(id, "false") == 0 || |
434 | strcmp(id, "FALSE") == 0 || | |
435 | strcmp(id, "no") == 0 || | |
436 | strcmp(id, "NO") == 0) { | |
8bd04432 PP |
437 | value = bt_value_bool_create_init(false); |
438 | } else { | |
439 | value = bt_value_string_create_init(id); | |
440 | } | |
441 | break; | |
442 | } | |
443 | default: | |
444 | /* Unset return value variable will trigger the error */ | |
445 | ini_append_error_expecting(state, state->scanner, "value"); | |
446 | break; | |
447 | } | |
448 | ||
449 | end: | |
450 | return value; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Handles the current state of the INI parser. | |
455 | * | |
456 | * Returns 0 to continue, 1 to end, or a negative value on error. | |
457 | */ | |
458 | static | |
459 | int ini_handle_state(struct ini_parsing_state *state) | |
460 | { | |
461 | int ret = 0; | |
462 | GTokenType token_type; | |
463 | bt_value *value = NULL; | |
464 | ||
465 | token_type = g_scanner_get_next_token(state->scanner); | |
466 | if (token_type == G_TOKEN_EOF) { | |
467 | if (state->expecting != INI_EXPECT_COMMA) { | |
468 | switch (state->expecting) { | |
469 | case INI_EXPECT_EQUAL: | |
470 | ini_append_error_expecting(state, | |
471 | state->scanner, "`=`"); | |
472 | break; | |
473 | case INI_EXPECT_VALUE: | |
474 | ini_append_error_expecting(state, | |
475 | state->scanner, "value"); | |
476 | break; | |
477 | case INI_EXPECT_MAP_KEY: | |
478 | ini_append_error_expecting(state, | |
479 | state->scanner, "unquoted map key"); | |
480 | break; | |
481 | default: | |
482 | break; | |
483 | } | |
484 | goto error; | |
485 | } | |
486 | ||
487 | /* We're done! */ | |
488 | ret = 1; | |
489 | goto success; | |
490 | } | |
491 | ||
492 | switch (state->expecting) { | |
493 | case INI_EXPECT_MAP_KEY: | |
494 | if (token_type != G_TOKEN_IDENTIFIER) { | |
495 | ini_append_error_expecting(state, state->scanner, | |
496 | "unquoted map key"); | |
497 | goto error; | |
498 | } | |
499 | ||
500 | g_string_assign(state->last_map_key, | |
501 | state->scanner->value.v_identifier); | |
502 | ||
503 | if (bt_value_map_has_entry(state->params, | |
504 | state->last_map_key->str)) { | |
505 | g_string_append_printf(state->ini_error, | |
506 | "Duplicate parameter key: `%s`\n", | |
507 | state->last_map_key->str); | |
508 | goto error; | |
509 | } | |
510 | ||
511 | state->expecting = INI_EXPECT_EQUAL; | |
512 | goto success; | |
513 | case INI_EXPECT_EQUAL: | |
514 | if (token_type != G_TOKEN_CHAR) { | |
515 | ini_append_error_expecting(state, | |
516 | state->scanner, "'='"); | |
517 | goto error; | |
518 | } | |
519 | ||
520 | if (state->scanner->value.v_char != '=') { | |
521 | ini_append_error_expecting(state, | |
522 | state->scanner, "'='"); | |
523 | goto error; | |
524 | } | |
525 | ||
526 | state->expecting = INI_EXPECT_VALUE; | |
527 | goto success; | |
528 | case INI_EXPECT_VALUE: | |
529 | { | |
530 | value = ini_parse_value(state); | |
531 | if (!value) { | |
532 | goto error; | |
533 | } | |
534 | ||
535 | state->expecting = INI_EXPECT_COMMA; | |
536 | goto success; | |
537 | } | |
538 | case INI_EXPECT_COMMA: | |
539 | if (token_type != G_TOKEN_CHAR) { | |
540 | ini_append_error_expecting(state, | |
541 | state->scanner, "','"); | |
542 | goto error; | |
543 | } | |
544 | ||
545 | if (state->scanner->value.v_char != ',') { | |
546 | ini_append_error_expecting(state, | |
547 | state->scanner, "','"); | |
548 | goto error; | |
549 | } | |
550 | ||
551 | state->expecting = INI_EXPECT_MAP_KEY; | |
552 | goto success; | |
553 | default: | |
498e7994 | 554 | bt_common_abort(); |
8bd04432 PP |
555 | } |
556 | ||
557 | error: | |
558 | ret = -1; | |
559 | goto end; | |
560 | ||
561 | success: | |
562 | if (value) { | |
563 | if (bt_value_map_insert_entry(state->params, | |
564 | state->last_map_key->str, value)) { | |
565 | /* Only override return value on error */ | |
566 | ret = -1; | |
567 | } | |
568 | } | |
569 | ||
570 | end: | |
571 | BT_VALUE_PUT_REF_AND_RESET(value); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | /* | |
576 | * Converts an INI-style argument to an equivalent map value object. | |
577 | * | |
578 | * Return value is owned by the caller. | |
579 | */ | |
580 | BT_HIDDEN | |
5869b179 | 581 | bt_value *bt_param_parse(const char *arg, GString *ini_error) |
8bd04432 PP |
582 | { |
583 | /* Lexical scanner configuration */ | |
584 | GScannerConfig scanner_config = { | |
585 | /* Skip whitespaces */ | |
02bb4fcc | 586 | .cset_skip_characters = (gchar *) " \t\n", |
8bd04432 PP |
587 | |
588 | /* Identifier syntax is: [a-zA-Z_][a-zA-Z0-9_.:-]* */ | |
02bb4fcc | 589 | .cset_identifier_first = (gchar *) |
8bd04432 PP |
590 | G_CSET_a_2_z |
591 | "_" | |
592 | G_CSET_A_2_Z, | |
02bb4fcc | 593 | .cset_identifier_nth = (gchar *) |
8bd04432 PP |
594 | G_CSET_a_2_z |
595 | "_0123456789-.:" | |
596 | G_CSET_A_2_Z, | |
597 | ||
598 | /* "hello" and "Hello" two different keys */ | |
599 | .case_sensitive = TRUE, | |
600 | ||
601 | /* No comments */ | |
602 | .cpair_comment_single = NULL, | |
603 | .skip_comment_multi = TRUE, | |
604 | .skip_comment_single = TRUE, | |
605 | .scan_comment_multi = FALSE, | |
606 | ||
607 | /* | |
608 | * Do scan identifiers, including 1-char identifiers, | |
609 | * but NULL is a normal identifier. | |
610 | */ | |
611 | .scan_identifier = TRUE, | |
612 | .scan_identifier_1char = TRUE, | |
613 | .scan_identifier_NULL = FALSE, | |
614 | ||
615 | /* | |
616 | * No specific symbols: null and boolean "symbols" are | |
617 | * scanned as plain identifiers. | |
618 | */ | |
619 | .scan_symbols = FALSE, | |
620 | .symbol_2_token = FALSE, | |
621 | .scope_0_fallback = FALSE, | |
622 | ||
623 | /* | |
624 | * Scan "0b"-, "0"-, and "0x"-prefixed integers, but not | |
625 | * integers prefixed with "$". | |
626 | */ | |
627 | .scan_binary = TRUE, | |
628 | .scan_octal = TRUE, | |
629 | .scan_float = TRUE, | |
630 | .scan_hex = TRUE, | |
631 | .scan_hex_dollar = FALSE, | |
632 | ||
633 | /* Convert scanned numbers to integer tokens */ | |
634 | .numbers_2_int = TRUE, | |
635 | ||
636 | /* Support both integers and floating point numbers */ | |
637 | .int_2_float = FALSE, | |
638 | ||
639 | /* Scan integers as 64-bit signed integers */ | |
640 | .store_int64 = TRUE, | |
641 | ||
642 | /* Only scan double-quoted strings */ | |
643 | .scan_string_sq = FALSE, | |
644 | .scan_string_dq = TRUE, | |
645 | ||
646 | /* Do not converter identifiers to string tokens */ | |
647 | .identifier_2_string = FALSE, | |
648 | ||
649 | /* Scan characters as `G_TOKEN_CHAR` token */ | |
650 | .char_2_token = FALSE, | |
651 | }; | |
652 | struct ini_parsing_state state = { | |
653 | .scanner = NULL, | |
654 | .params = NULL, | |
655 | .expecting = INI_EXPECT_MAP_KEY, | |
656 | .arg = arg, | |
657 | .ini_error = ini_error, | |
658 | }; | |
659 | ||
660 | BT_ASSERT(ini_error); | |
661 | g_string_assign(ini_error, ""); | |
662 | state.params = bt_value_map_create(); | |
663 | if (!state.params) { | |
664 | ini_append_oom_error(ini_error); | |
665 | goto error; | |
666 | } | |
667 | ||
668 | state.scanner = g_scanner_new(&scanner_config); | |
669 | if (!state.scanner) { | |
670 | ini_append_oom_error(ini_error); | |
671 | goto error; | |
672 | } | |
673 | ||
674 | state.last_map_key = g_string_new(NULL); | |
675 | if (!state.last_map_key) { | |
676 | ini_append_oom_error(ini_error); | |
677 | goto error; | |
678 | } | |
679 | ||
680 | /* Let the scan begin */ | |
681 | g_scanner_input_text(state.scanner, arg, strlen(arg)); | |
682 | ||
683 | while (true) { | |
684 | int ret = ini_handle_state(&state); | |
685 | ||
686 | if (ret < 0) { | |
687 | /* Error */ | |
688 | goto error; | |
689 | } else if (ret > 0) { | |
690 | /* Done */ | |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
695 | goto end; | |
696 | ||
697 | error: | |
698 | BT_VALUE_PUT_REF_AND_RESET(state.params); | |
699 | ||
700 | end: | |
701 | if (state.scanner) { | |
702 | g_scanner_destroy(state.scanner); | |
703 | } | |
704 | ||
705 | if (state.last_map_key) { | |
706 | g_string_free(state.last_map_key, TRUE); | |
707 | } | |
708 | ||
709 | return state.params; | |
710 | } |