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Commit | Line | Data |
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4a5fcab7 | 1 | /* |
6e8e5cb9 | 2 | * JSON Parser |
4a5fcab7 AL |
3 | * |
4 | * Copyright IBM, Corp. 2009 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. | |
10 | * See the COPYING.LIB file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
f2ad72b3 | 14 | #include "qemu/osdep.h" |
2bc7cfea | 15 | #include "qemu/cutils.h" |
da34e65c | 16 | #include "qapi/error.h" |
4a5fcab7 | 17 | #include "qemu-common.h" |
6b673957 | 18 | #include "qapi/qmp/qbool.h" |
15280c36 MA |
19 | #include "qapi/qmp/qnull.h" |
20 | #include "qapi/qmp/qnum.h" | |
6b673957 | 21 | #include "qapi/qmp/qstring.h" |
7b1b5d19 PB |
22 | #include "qapi/qmp/json-parser.h" |
23 | #include "qapi/qmp/json-lexer.h" | |
9bada897 | 24 | #include "qapi/qmp/json-streamer.h" |
4a5fcab7 AL |
25 | |
26 | typedef struct JSONParserContext | |
27 | { | |
ef749d07 | 28 | Error *err; |
9bada897 | 29 | JSONToken *current; |
95385fe9 | 30 | GQueue *buf; |
4a5fcab7 AL |
31 | } JSONParserContext; |
32 | ||
33 | #define BUG_ON(cond) assert(!(cond)) | |
34 | ||
35 | /** | |
36 | * TODO | |
37 | * | |
38 | * 0) make errors meaningful again | |
39 | * 1) add geometry information to tokens | |
40 | * 3) should we return a parsed size? | |
41 | * 4) deal with premature EOI | |
42 | */ | |
43 | ||
65c0f1e9 | 44 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap); |
4a5fcab7 | 45 | |
4a5fcab7 AL |
46 | /** |
47 | * Error handler | |
48 | */ | |
8b7968f7 | 49 | static void GCC_FMT_ATTR(3, 4) parse_error(JSONParserContext *ctxt, |
9bada897 | 50 | JSONToken *token, const char *msg, ...) |
4a5fcab7 | 51 | { |
c96c84a9 | 52 | va_list ap; |
ef749d07 | 53 | char message[1024]; |
c96c84a9 | 54 | va_start(ap, msg); |
ef749d07 | 55 | vsnprintf(message, sizeof(message), msg, ap); |
c96c84a9 | 56 | va_end(ap); |
ef749d07 AL |
57 | if (ctxt->err) { |
58 | error_free(ctxt->err); | |
59 | ctxt->err = NULL; | |
60 | } | |
f231b88d | 61 | error_setg(&ctxt->err, "JSON parse error, %s", message); |
4a5fcab7 AL |
62 | } |
63 | ||
64 | /** | |
65 | * String helpers | |
66 | * | |
67 | * These helpers are used to unescape strings. | |
68 | */ | |
69 | static void wchar_to_utf8(uint16_t wchar, char *buffer, size_t buffer_length) | |
70 | { | |
71 | if (wchar <= 0x007F) { | |
72 | BUG_ON(buffer_length < 2); | |
73 | ||
74 | buffer[0] = wchar & 0x7F; | |
75 | buffer[1] = 0; | |
76 | } else if (wchar <= 0x07FF) { | |
77 | BUG_ON(buffer_length < 3); | |
78 | ||
79 | buffer[0] = 0xC0 | ((wchar >> 6) & 0x1F); | |
80 | buffer[1] = 0x80 | (wchar & 0x3F); | |
81 | buffer[2] = 0; | |
82 | } else { | |
83 | BUG_ON(buffer_length < 4); | |
84 | ||
85 | buffer[0] = 0xE0 | ((wchar >> 12) & 0x0F); | |
86 | buffer[1] = 0x80 | ((wchar >> 6) & 0x3F); | |
87 | buffer[2] = 0x80 | (wchar & 0x3F); | |
88 | buffer[3] = 0; | |
89 | } | |
90 | } | |
91 | ||
92 | static int hex2decimal(char ch) | |
93 | { | |
94 | if (ch >= '0' && ch <= '9') { | |
95 | return (ch - '0'); | |
96 | } else if (ch >= 'a' && ch <= 'f') { | |
97 | return 10 + (ch - 'a'); | |
98 | } else if (ch >= 'A' && ch <= 'F') { | |
99 | return 10 + (ch - 'A'); | |
100 | } | |
101 | ||
102 | return -1; | |
103 | } | |
104 | ||
105 | /** | |
106 | * parse_string(): Parse a json string and return a QObject | |
107 | * | |
108 | * string | |
109 | * "" | |
110 | * " chars " | |
111 | * chars | |
112 | * char | |
113 | * char chars | |
114 | * char | |
115 | * any-Unicode-character- | |
116 | * except-"-or-\-or- | |
117 | * control-character | |
118 | * \" | |
119 | * \\ | |
120 | * \/ | |
121 | * \b | |
122 | * \f | |
123 | * \n | |
124 | * \r | |
125 | * \t | |
126 | * \u four-hex-digits | |
127 | */ | |
9bada897 PB |
128 | static QString *qstring_from_escaped_str(JSONParserContext *ctxt, |
129 | JSONToken *token) | |
4a5fcab7 | 130 | { |
9bada897 | 131 | const char *ptr = token->str; |
4a5fcab7 AL |
132 | QString *str; |
133 | int double_quote = 1; | |
134 | ||
135 | if (*ptr == '"') { | |
136 | double_quote = 1; | |
137 | } else { | |
138 | double_quote = 0; | |
139 | } | |
140 | ptr++; | |
141 | ||
142 | str = qstring_new(); | |
143 | while (*ptr && | |
144 | ((double_quote && *ptr != '"') || (!double_quote && *ptr != '\''))) { | |
145 | if (*ptr == '\\') { | |
146 | ptr++; | |
147 | ||
148 | switch (*ptr) { | |
149 | case '"': | |
150 | qstring_append(str, "\""); | |
151 | ptr++; | |
152 | break; | |
153 | case '\'': | |
154 | qstring_append(str, "'"); | |
155 | ptr++; | |
156 | break; | |
157 | case '\\': | |
158 | qstring_append(str, "\\"); | |
159 | ptr++; | |
160 | break; | |
161 | case '/': | |
162 | qstring_append(str, "/"); | |
163 | ptr++; | |
164 | break; | |
165 | case 'b': | |
166 | qstring_append(str, "\b"); | |
167 | ptr++; | |
168 | break; | |
bd032695 LC |
169 | case 'f': |
170 | qstring_append(str, "\f"); | |
171 | ptr++; | |
172 | break; | |
4a5fcab7 AL |
173 | case 'n': |
174 | qstring_append(str, "\n"); | |
175 | ptr++; | |
176 | break; | |
177 | case 'r': | |
178 | qstring_append(str, "\r"); | |
179 | ptr++; | |
180 | break; | |
181 | case 't': | |
182 | qstring_append(str, "\t"); | |
183 | ptr++; | |
184 | break; | |
185 | case 'u': { | |
186 | uint16_t unicode_char = 0; | |
187 | char utf8_char[4]; | |
188 | int i = 0; | |
189 | ||
190 | ptr++; | |
191 | ||
192 | for (i = 0; i < 4; i++) { | |
193 | if (qemu_isxdigit(*ptr)) { | |
194 | unicode_char |= hex2decimal(*ptr) << ((3 - i) * 4); | |
195 | } else { | |
196 | parse_error(ctxt, token, | |
197 | "invalid hex escape sequence in string"); | |
198 | goto out; | |
199 | } | |
200 | ptr++; | |
201 | } | |
202 | ||
203 | wchar_to_utf8(unicode_char, utf8_char, sizeof(utf8_char)); | |
204 | qstring_append(str, utf8_char); | |
205 | } break; | |
206 | default: | |
207 | parse_error(ctxt, token, "invalid escape sequence in string"); | |
208 | goto out; | |
209 | } | |
210 | } else { | |
211 | char dummy[2]; | |
212 | ||
213 | dummy[0] = *ptr++; | |
214 | dummy[1] = 0; | |
215 | ||
216 | qstring_append(str, dummy); | |
217 | } | |
218 | } | |
219 | ||
4a5fcab7 AL |
220 | return str; |
221 | ||
222 | out: | |
223 | QDECREF(str); | |
224 | return NULL; | |
225 | } | |
226 | ||
9bada897 PB |
227 | /* Note: the token object returned by parser_context_peek_token or |
228 | * parser_context_pop_token is deleted as soon as parser_context_pop_token | |
229 | * is called again. | |
95385fe9 | 230 | */ |
9bada897 | 231 | static JSONToken *parser_context_pop_token(JSONParserContext *ctxt) |
65c0f1e9 | 232 | { |
9bada897 | 233 | g_free(ctxt->current); |
95385fe9 PB |
234 | assert(!g_queue_is_empty(ctxt->buf)); |
235 | ctxt->current = g_queue_pop_head(ctxt->buf); | |
236 | return ctxt->current; | |
65c0f1e9 MR |
237 | } |
238 | ||
9bada897 | 239 | static JSONToken *parser_context_peek_token(JSONParserContext *ctxt) |
65c0f1e9 | 240 | { |
95385fe9 PB |
241 | assert(!g_queue_is_empty(ctxt->buf)); |
242 | return g_queue_peek_head(ctxt->buf); | |
65c0f1e9 MR |
243 | } |
244 | ||
95385fe9 | 245 | static JSONParserContext *parser_context_new(GQueue *tokens) |
65c0f1e9 MR |
246 | { |
247 | JSONParserContext *ctxt; | |
65c0f1e9 MR |
248 | |
249 | if (!tokens) { | |
250 | return NULL; | |
251 | } | |
252 | ||
65c0f1e9 | 253 | ctxt = g_malloc0(sizeof(JSONParserContext)); |
95385fe9 | 254 | ctxt->buf = tokens; |
65c0f1e9 MR |
255 | |
256 | return ctxt; | |
257 | } | |
258 | ||
259 | /* to support error propagation, ctxt->err must be freed separately */ | |
260 | static void parser_context_free(JSONParserContext *ctxt) | |
261 | { | |
65c0f1e9 | 262 | if (ctxt) { |
95385fe9 PB |
263 | while (!g_queue_is_empty(ctxt->buf)) { |
264 | parser_context_pop_token(ctxt); | |
65c0f1e9 | 265 | } |
9bada897 | 266 | g_free(ctxt->current); |
95385fe9 | 267 | g_queue_free(ctxt->buf); |
65c0f1e9 MR |
268 | g_free(ctxt); |
269 | } | |
270 | } | |
271 | ||
4a5fcab7 AL |
272 | /** |
273 | * Parsing rules | |
274 | */ | |
65c0f1e9 | 275 | static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) |
4a5fcab7 | 276 | { |
9bada897 PB |
277 | QObject *key = NULL, *value; |
278 | JSONToken *peek, *token; | |
4a5fcab7 | 279 | |
65c0f1e9 | 280 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
281 | if (peek == NULL) { |
282 | parse_error(ctxt, NULL, "premature EOI"); | |
283 | goto out; | |
284 | } | |
285 | ||
65c0f1e9 | 286 | key = parse_value(ctxt, ap); |
d758d90f | 287 | if (!key || qobject_type(key) != QTYPE_QSTRING) { |
4a5fcab7 AL |
288 | parse_error(ctxt, peek, "key is not a string in object"); |
289 | goto out; | |
290 | } | |
291 | ||
65c0f1e9 | 292 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
293 | if (token == NULL) { |
294 | parse_error(ctxt, NULL, "premature EOI"); | |
295 | goto out; | |
296 | } | |
297 | ||
9bada897 | 298 | if (token->type != JSON_COLON) { |
4a5fcab7 AL |
299 | parse_error(ctxt, token, "missing : in object pair"); |
300 | goto out; | |
301 | } | |
302 | ||
65c0f1e9 | 303 | value = parse_value(ctxt, ap); |
4a5fcab7 AL |
304 | if (value == NULL) { |
305 | parse_error(ctxt, token, "Missing value in dict"); | |
306 | goto out; | |
307 | } | |
308 | ||
309 | qdict_put_obj(dict, qstring_get_str(qobject_to_qstring(key)), value); | |
310 | ||
4a5fcab7 | 311 | qobject_decref(key); |
4a5fcab7 AL |
312 | |
313 | return 0; | |
314 | ||
315 | out: | |
4a5fcab7 | 316 | qobject_decref(key); |
4a5fcab7 AL |
317 | |
318 | return -1; | |
319 | } | |
320 | ||
65c0f1e9 | 321 | static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
322 | { |
323 | QDict *dict = NULL; | |
9bada897 | 324 | JSONToken *token, *peek; |
4a5fcab7 | 325 | |
65c0f1e9 | 326 | token = parser_context_pop_token(ctxt); |
9bada897 | 327 | assert(token && token->type == JSON_LCURLY); |
4a5fcab7 AL |
328 | |
329 | dict = qdict_new(); | |
330 | ||
65c0f1e9 | 331 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
332 | if (peek == NULL) { |
333 | parse_error(ctxt, NULL, "premature EOI"); | |
334 | goto out; | |
335 | } | |
336 | ||
9bada897 | 337 | if (peek->type != JSON_RCURLY) { |
65c0f1e9 | 338 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
339 | goto out; |
340 | } | |
341 | ||
65c0f1e9 | 342 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
343 | if (token == NULL) { |
344 | parse_error(ctxt, NULL, "premature EOI"); | |
345 | goto out; | |
346 | } | |
347 | ||
9bada897 PB |
348 | while (token->type != JSON_RCURLY) { |
349 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
350 | parse_error(ctxt, token, "expected separator in dict"); |
351 | goto out; | |
352 | } | |
4a5fcab7 | 353 | |
65c0f1e9 | 354 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
355 | goto out; |
356 | } | |
357 | ||
65c0f1e9 | 358 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
359 | if (token == NULL) { |
360 | parse_error(ctxt, NULL, "premature EOI"); | |
361 | goto out; | |
362 | } | |
4a5fcab7 | 363 | } |
4a5fcab7 | 364 | } else { |
a491af47 | 365 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
366 | } |
367 | ||
4a5fcab7 AL |
368 | return QOBJECT(dict); |
369 | ||
370 | out: | |
4a5fcab7 AL |
371 | QDECREF(dict); |
372 | return NULL; | |
373 | } | |
374 | ||
65c0f1e9 | 375 | static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
376 | { |
377 | QList *list = NULL; | |
9bada897 | 378 | JSONToken *token, *peek; |
4a5fcab7 | 379 | |
65c0f1e9 | 380 | token = parser_context_pop_token(ctxt); |
9bada897 | 381 | assert(token && token->type == JSON_LSQUARE); |
4a5fcab7 AL |
382 | |
383 | list = qlist_new(); | |
384 | ||
65c0f1e9 | 385 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
386 | if (peek == NULL) { |
387 | parse_error(ctxt, NULL, "premature EOI"); | |
388 | goto out; | |
389 | } | |
390 | ||
9bada897 | 391 | if (peek->type != JSON_RSQUARE) { |
4a5fcab7 AL |
392 | QObject *obj; |
393 | ||
65c0f1e9 | 394 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
395 | if (obj == NULL) { |
396 | parse_error(ctxt, token, "expecting value"); | |
397 | goto out; | |
398 | } | |
399 | ||
400 | qlist_append_obj(list, obj); | |
401 | ||
65c0f1e9 | 402 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
403 | if (token == NULL) { |
404 | parse_error(ctxt, NULL, "premature EOI"); | |
405 | goto out; | |
406 | } | |
407 | ||
9bada897 PB |
408 | while (token->type != JSON_RSQUARE) { |
409 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
410 | parse_error(ctxt, token, "expected separator in list"); |
411 | goto out; | |
412 | } | |
413 | ||
65c0f1e9 | 414 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
415 | if (obj == NULL) { |
416 | parse_error(ctxt, token, "expecting value"); | |
417 | goto out; | |
418 | } | |
419 | ||
420 | qlist_append_obj(list, obj); | |
421 | ||
65c0f1e9 | 422 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
423 | if (token == NULL) { |
424 | parse_error(ctxt, NULL, "premature EOI"); | |
425 | goto out; | |
426 | } | |
4a5fcab7 | 427 | } |
4a5fcab7 | 428 | } else { |
a491af47 | 429 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
430 | } |
431 | ||
4a5fcab7 AL |
432 | return QOBJECT(list); |
433 | ||
434 | out: | |
4a5fcab7 AL |
435 | QDECREF(list); |
436 | return NULL; | |
437 | } | |
438 | ||
65c0f1e9 | 439 | static QObject *parse_keyword(JSONParserContext *ctxt) |
4a5fcab7 | 440 | { |
9bada897 | 441 | JSONToken *token; |
4a5fcab7 | 442 | |
65c0f1e9 | 443 | token = parser_context_pop_token(ctxt); |
9bada897 | 444 | assert(token && token->type == JSON_KEYWORD); |
50e2a467 | 445 | |
9bada897 | 446 | if (!strcmp(token->str, "true")) { |
d538b255 | 447 | return QOBJECT(qbool_from_bool(true)); |
9bada897 | 448 | } else if (!strcmp(token->str, "false")) { |
d538b255 | 449 | return QOBJECT(qbool_from_bool(false)); |
9bada897 | 450 | } else if (!strcmp(token->str, "null")) { |
006ca09f | 451 | return QOBJECT(qnull()); |
4a5fcab7 | 452 | } |
9bada897 | 453 | parse_error(ctxt, token, "invalid keyword '%s'", token->str); |
4a5fcab7 AL |
454 | return NULL; |
455 | } | |
456 | ||
65c0f1e9 | 457 | static QObject *parse_escape(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 458 | { |
9bada897 | 459 | JSONToken *token; |
4a5fcab7 AL |
460 | |
461 | if (ap == NULL) { | |
d538b255 | 462 | return NULL; |
4a5fcab7 AL |
463 | } |
464 | ||
65c0f1e9 | 465 | token = parser_context_pop_token(ctxt); |
9bada897 | 466 | assert(token && token->type == JSON_ESCAPE); |
6b9606f6 | 467 | |
9bada897 | 468 | if (!strcmp(token->str, "%p")) { |
d538b255 | 469 | return va_arg(*ap, QObject *); |
9bada897 | 470 | } else if (!strcmp(token->str, "%i")) { |
d538b255 | 471 | return QOBJECT(qbool_from_bool(va_arg(*ap, int))); |
9bada897 | 472 | } else if (!strcmp(token->str, "%d")) { |
01b2ffce | 473 | return QOBJECT(qnum_from_int(va_arg(*ap, int))); |
9bada897 | 474 | } else if (!strcmp(token->str, "%ld")) { |
01b2ffce | 475 | return QOBJECT(qnum_from_int(va_arg(*ap, long))); |
9bada897 PB |
476 | } else if (!strcmp(token->str, "%lld") || |
477 | !strcmp(token->str, "%I64d")) { | |
01b2ffce | 478 | return QOBJECT(qnum_from_int(va_arg(*ap, long long))); |
2bc7cfea MAL |
479 | } else if (!strcmp(token->str, "%u")) { |
480 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned int))); | |
481 | } else if (!strcmp(token->str, "%lu")) { | |
482 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long))); | |
483 | } else if (!strcmp(token->str, "%llu") || | |
484 | !strcmp(token->str, "%I64u")) { | |
485 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long long))); | |
9bada897 | 486 | } else if (!strcmp(token->str, "%s")) { |
d538b255 | 487 | return QOBJECT(qstring_from_str(va_arg(*ap, const char *))); |
9bada897 | 488 | } else if (!strcmp(token->str, "%f")) { |
01b2ffce | 489 | return QOBJECT(qnum_from_double(va_arg(*ap, double))); |
4a5fcab7 | 490 | } |
4a5fcab7 AL |
491 | return NULL; |
492 | } | |
493 | ||
65c0f1e9 | 494 | static QObject *parse_literal(JSONParserContext *ctxt) |
4a5fcab7 | 495 | { |
9bada897 | 496 | JSONToken *token; |
4a5fcab7 | 497 | |
65c0f1e9 | 498 | token = parser_context_pop_token(ctxt); |
d538b255 | 499 | assert(token); |
11e8a46c | 500 | |
9bada897 | 501 | switch (token->type) { |
4a5fcab7 | 502 | case JSON_STRING: |
d538b255 | 503 | return QOBJECT(qstring_from_escaped_str(ctxt, token)); |
3d5b3ec6 | 504 | case JSON_INTEGER: { |
01b2ffce MAL |
505 | /* |
506 | * Represent JSON_INTEGER as QNUM_I64 if possible, else as | |
2bc7cfea MAL |
507 | * QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64() |
508 | * and qemu_strtou64() fail with ERANGE when it's not | |
509 | * possible. | |
3d5b3ec6 | 510 | * |
01b2ffce | 511 | * qnum_get_int() will then work for any signed 64-bit |
2bc7cfea MAL |
512 | * JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit |
513 | * integer, and qnum_get_double() both for any JSON_INTEGER | |
514 | * and any JSON_FLOAT (with precision loss for integers beyond | |
515 | * 53 bits) | |
3d5b3ec6 | 516 | */ |
2bc7cfea | 517 | int ret; |
3d5b3ec6 | 518 | int64_t value; |
2bc7cfea | 519 | uint64_t uvalue; |
3d5b3ec6 | 520 | |
2bc7cfea MAL |
521 | ret = qemu_strtoi64(token->str, NULL, 10, &value); |
522 | if (!ret) { | |
01b2ffce | 523 | return QOBJECT(qnum_from_int(value)); |
3d5b3ec6 | 524 | } |
2bc7cfea MAL |
525 | assert(ret == -ERANGE); |
526 | ||
527 | if (token->str[0] != '-') { | |
528 | ret = qemu_strtou64(token->str, NULL, 10, &uvalue); | |
529 | if (!ret) { | |
530 | return QOBJECT(qnum_from_uint(uvalue)); | |
531 | } | |
532 | assert(ret == -ERANGE); | |
533 | } | |
3d5b3ec6 MR |
534 | /* fall through to JSON_FLOAT */ |
535 | } | |
4a5fcab7 | 536 | case JSON_FLOAT: |
6e8e5cb9 EB |
537 | /* FIXME dependent on locale; a pervasive issue in QEMU */ |
538 | /* FIXME our lexer matches RFC 7159 in forbidding Inf or NaN, | |
539 | * but those might be useful extensions beyond JSON */ | |
01b2ffce | 540 | return QOBJECT(qnum_from_double(strtod(token->str, NULL))); |
4a5fcab7 | 541 | default: |
d538b255 | 542 | abort(); |
4a5fcab7 | 543 | } |
4a5fcab7 AL |
544 | } |
545 | ||
65c0f1e9 | 546 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 547 | { |
9bada897 | 548 | JSONToken *token; |
4a5fcab7 | 549 | |
d538b255 MA |
550 | token = parser_context_peek_token(ctxt); |
551 | if (token == NULL) { | |
552 | parse_error(ctxt, NULL, "premature EOI"); | |
553 | return NULL; | |
4a5fcab7 AL |
554 | } |
555 | ||
9bada897 | 556 | switch (token->type) { |
d538b255 MA |
557 | case JSON_LCURLY: |
558 | return parse_object(ctxt, ap); | |
559 | case JSON_LSQUARE: | |
560 | return parse_array(ctxt, ap); | |
561 | case JSON_ESCAPE: | |
562 | return parse_escape(ctxt, ap); | |
563 | case JSON_INTEGER: | |
564 | case JSON_FLOAT: | |
565 | case JSON_STRING: | |
566 | return parse_literal(ctxt); | |
567 | case JSON_KEYWORD: | |
568 | return parse_keyword(ctxt); | |
569 | default: | |
570 | parse_error(ctxt, token, "expecting value"); | |
571 | return NULL; | |
572 | } | |
4a5fcab7 AL |
573 | } |
574 | ||
95385fe9 | 575 | QObject *json_parser_parse(GQueue *tokens, va_list *ap) |
ef749d07 AL |
576 | { |
577 | return json_parser_parse_err(tokens, ap, NULL); | |
578 | } | |
579 | ||
95385fe9 | 580 | QObject *json_parser_parse_err(GQueue *tokens, va_list *ap, Error **errp) |
4a5fcab7 | 581 | { |
65c0f1e9 | 582 | JSONParserContext *ctxt = parser_context_new(tokens); |
4a5fcab7 AL |
583 | QObject *result; |
584 | ||
65c0f1e9 | 585 | if (!ctxt) { |
c1990ebf MR |
586 | return NULL; |
587 | } | |
4a5fcab7 | 588 | |
65c0f1e9 MR |
589 | result = parse_value(ctxt, ap); |
590 | ||
591 | error_propagate(errp, ctxt->err); | |
4a5fcab7 | 592 | |
65c0f1e9 | 593 | parser_context_free(ctxt); |
ef749d07 | 594 | |
4a5fcab7 AL |
595 | return result; |
596 | } |