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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" |
452fcdbc | 19 | #include "qapi/qmp/qdict.h" |
47e6b297 | 20 | #include "qapi/qmp/qlist.h" |
15280c36 MA |
21 | #include "qapi/qmp/qnull.h" |
22 | #include "qapi/qmp/qnum.h" | |
6b673957 | 23 | #include "qapi/qmp/qstring.h" |
7b1b5d19 PB |
24 | #include "qapi/qmp/json-parser.h" |
25 | #include "qapi/qmp/json-lexer.h" | |
9bada897 | 26 | #include "qapi/qmp/json-streamer.h" |
4a5fcab7 AL |
27 | |
28 | typedef struct JSONParserContext | |
29 | { | |
ef749d07 | 30 | Error *err; |
9bada897 | 31 | JSONToken *current; |
95385fe9 | 32 | GQueue *buf; |
4a5fcab7 AL |
33 | } JSONParserContext; |
34 | ||
35 | #define BUG_ON(cond) assert(!(cond)) | |
36 | ||
37 | /** | |
38 | * TODO | |
39 | * | |
40 | * 0) make errors meaningful again | |
41 | * 1) add geometry information to tokens | |
42 | * 3) should we return a parsed size? | |
43 | * 4) deal with premature EOI | |
44 | */ | |
45 | ||
65c0f1e9 | 46 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap); |
4a5fcab7 | 47 | |
4a5fcab7 AL |
48 | /** |
49 | * Error handler | |
50 | */ | |
8b7968f7 | 51 | static void GCC_FMT_ATTR(3, 4) parse_error(JSONParserContext *ctxt, |
9bada897 | 52 | JSONToken *token, const char *msg, ...) |
4a5fcab7 | 53 | { |
c96c84a9 | 54 | va_list ap; |
ef749d07 | 55 | char message[1024]; |
c96c84a9 | 56 | va_start(ap, msg); |
ef749d07 | 57 | vsnprintf(message, sizeof(message), msg, ap); |
c96c84a9 | 58 | va_end(ap); |
ef749d07 AL |
59 | if (ctxt->err) { |
60 | error_free(ctxt->err); | |
61 | ctxt->err = NULL; | |
62 | } | |
f231b88d | 63 | error_setg(&ctxt->err, "JSON parse error, %s", message); |
4a5fcab7 AL |
64 | } |
65 | ||
66 | /** | |
67 | * String helpers | |
68 | * | |
69 | * These helpers are used to unescape strings. | |
70 | */ | |
71 | static void wchar_to_utf8(uint16_t wchar, char *buffer, size_t buffer_length) | |
72 | { | |
73 | if (wchar <= 0x007F) { | |
74 | BUG_ON(buffer_length < 2); | |
75 | ||
76 | buffer[0] = wchar & 0x7F; | |
77 | buffer[1] = 0; | |
78 | } else if (wchar <= 0x07FF) { | |
79 | BUG_ON(buffer_length < 3); | |
80 | ||
81 | buffer[0] = 0xC0 | ((wchar >> 6) & 0x1F); | |
82 | buffer[1] = 0x80 | (wchar & 0x3F); | |
83 | buffer[2] = 0; | |
84 | } else { | |
85 | BUG_ON(buffer_length < 4); | |
86 | ||
87 | buffer[0] = 0xE0 | ((wchar >> 12) & 0x0F); | |
88 | buffer[1] = 0x80 | ((wchar >> 6) & 0x3F); | |
89 | buffer[2] = 0x80 | (wchar & 0x3F); | |
90 | buffer[3] = 0; | |
91 | } | |
92 | } | |
93 | ||
94 | static int hex2decimal(char ch) | |
95 | { | |
96 | if (ch >= '0' && ch <= '9') { | |
97 | return (ch - '0'); | |
98 | } else if (ch >= 'a' && ch <= 'f') { | |
99 | return 10 + (ch - 'a'); | |
100 | } else if (ch >= 'A' && ch <= 'F') { | |
101 | return 10 + (ch - 'A'); | |
102 | } | |
103 | ||
104 | return -1; | |
105 | } | |
106 | ||
107 | /** | |
108 | * parse_string(): Parse a json string and return a QObject | |
109 | * | |
110 | * string | |
111 | * "" | |
112 | * " chars " | |
113 | * chars | |
114 | * char | |
115 | * char chars | |
116 | * char | |
117 | * any-Unicode-character- | |
118 | * except-"-or-\-or- | |
119 | * control-character | |
120 | * \" | |
121 | * \\ | |
122 | * \/ | |
123 | * \b | |
124 | * \f | |
125 | * \n | |
126 | * \r | |
127 | * \t | |
128 | * \u four-hex-digits | |
129 | */ | |
9bada897 PB |
130 | static QString *qstring_from_escaped_str(JSONParserContext *ctxt, |
131 | JSONToken *token) | |
4a5fcab7 | 132 | { |
9bada897 | 133 | const char *ptr = token->str; |
4a5fcab7 AL |
134 | QString *str; |
135 | int double_quote = 1; | |
136 | ||
137 | if (*ptr == '"') { | |
138 | double_quote = 1; | |
139 | } else { | |
140 | double_quote = 0; | |
141 | } | |
142 | ptr++; | |
143 | ||
144 | str = qstring_new(); | |
145 | while (*ptr && | |
146 | ((double_quote && *ptr != '"') || (!double_quote && *ptr != '\''))) { | |
147 | if (*ptr == '\\') { | |
148 | ptr++; | |
149 | ||
150 | switch (*ptr) { | |
151 | case '"': | |
152 | qstring_append(str, "\""); | |
153 | ptr++; | |
154 | break; | |
155 | case '\'': | |
156 | qstring_append(str, "'"); | |
157 | ptr++; | |
158 | break; | |
159 | case '\\': | |
160 | qstring_append(str, "\\"); | |
161 | ptr++; | |
162 | break; | |
163 | case '/': | |
164 | qstring_append(str, "/"); | |
165 | ptr++; | |
166 | break; | |
167 | case 'b': | |
168 | qstring_append(str, "\b"); | |
169 | ptr++; | |
170 | break; | |
bd032695 LC |
171 | case 'f': |
172 | qstring_append(str, "\f"); | |
173 | ptr++; | |
174 | break; | |
4a5fcab7 AL |
175 | case 'n': |
176 | qstring_append(str, "\n"); | |
177 | ptr++; | |
178 | break; | |
179 | case 'r': | |
180 | qstring_append(str, "\r"); | |
181 | ptr++; | |
182 | break; | |
183 | case 't': | |
184 | qstring_append(str, "\t"); | |
185 | ptr++; | |
186 | break; | |
187 | case 'u': { | |
188 | uint16_t unicode_char = 0; | |
189 | char utf8_char[4]; | |
190 | int i = 0; | |
191 | ||
192 | ptr++; | |
193 | ||
194 | for (i = 0; i < 4; i++) { | |
195 | if (qemu_isxdigit(*ptr)) { | |
196 | unicode_char |= hex2decimal(*ptr) << ((3 - i) * 4); | |
197 | } else { | |
198 | parse_error(ctxt, token, | |
199 | "invalid hex escape sequence in string"); | |
200 | goto out; | |
201 | } | |
202 | ptr++; | |
203 | } | |
204 | ||
205 | wchar_to_utf8(unicode_char, utf8_char, sizeof(utf8_char)); | |
206 | qstring_append(str, utf8_char); | |
207 | } break; | |
208 | default: | |
209 | parse_error(ctxt, token, "invalid escape sequence in string"); | |
210 | goto out; | |
211 | } | |
212 | } else { | |
213 | char dummy[2]; | |
214 | ||
215 | dummy[0] = *ptr++; | |
216 | dummy[1] = 0; | |
217 | ||
218 | qstring_append(str, dummy); | |
219 | } | |
220 | } | |
221 | ||
4a5fcab7 AL |
222 | return str; |
223 | ||
224 | out: | |
cb3e7f08 | 225 | qobject_unref(str); |
4a5fcab7 AL |
226 | return NULL; |
227 | } | |
228 | ||
9bada897 PB |
229 | /* Note: the token object returned by parser_context_peek_token or |
230 | * parser_context_pop_token is deleted as soon as parser_context_pop_token | |
231 | * is called again. | |
95385fe9 | 232 | */ |
9bada897 | 233 | static JSONToken *parser_context_pop_token(JSONParserContext *ctxt) |
65c0f1e9 | 234 | { |
9bada897 | 235 | g_free(ctxt->current); |
95385fe9 PB |
236 | assert(!g_queue_is_empty(ctxt->buf)); |
237 | ctxt->current = g_queue_pop_head(ctxt->buf); | |
238 | return ctxt->current; | |
65c0f1e9 MR |
239 | } |
240 | ||
9bada897 | 241 | static JSONToken *parser_context_peek_token(JSONParserContext *ctxt) |
65c0f1e9 | 242 | { |
95385fe9 PB |
243 | assert(!g_queue_is_empty(ctxt->buf)); |
244 | return g_queue_peek_head(ctxt->buf); | |
65c0f1e9 MR |
245 | } |
246 | ||
95385fe9 | 247 | static JSONParserContext *parser_context_new(GQueue *tokens) |
65c0f1e9 MR |
248 | { |
249 | JSONParserContext *ctxt; | |
65c0f1e9 MR |
250 | |
251 | if (!tokens) { | |
252 | return NULL; | |
253 | } | |
254 | ||
65c0f1e9 | 255 | ctxt = g_malloc0(sizeof(JSONParserContext)); |
95385fe9 | 256 | ctxt->buf = tokens; |
65c0f1e9 MR |
257 | |
258 | return ctxt; | |
259 | } | |
260 | ||
261 | /* to support error propagation, ctxt->err must be freed separately */ | |
262 | static void parser_context_free(JSONParserContext *ctxt) | |
263 | { | |
65c0f1e9 | 264 | if (ctxt) { |
95385fe9 PB |
265 | while (!g_queue_is_empty(ctxt->buf)) { |
266 | parser_context_pop_token(ctxt); | |
65c0f1e9 | 267 | } |
9bada897 | 268 | g_free(ctxt->current); |
95385fe9 | 269 | g_queue_free(ctxt->buf); |
65c0f1e9 MR |
270 | g_free(ctxt); |
271 | } | |
272 | } | |
273 | ||
4a5fcab7 AL |
274 | /** |
275 | * Parsing rules | |
276 | */ | |
65c0f1e9 | 277 | static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) |
4a5fcab7 | 278 | { |
532fb532 HR |
279 | QObject *value; |
280 | QString *key = NULL; | |
9bada897 | 281 | JSONToken *peek, *token; |
4a5fcab7 | 282 | |
65c0f1e9 | 283 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
284 | if (peek == NULL) { |
285 | parse_error(ctxt, NULL, "premature EOI"); | |
286 | goto out; | |
287 | } | |
288 | ||
532fb532 HR |
289 | key = qobject_to(QString, parse_value(ctxt, ap)); |
290 | if (!key) { | |
4a5fcab7 AL |
291 | parse_error(ctxt, peek, "key is not a string in object"); |
292 | goto out; | |
293 | } | |
294 | ||
65c0f1e9 | 295 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
296 | if (token == NULL) { |
297 | parse_error(ctxt, NULL, "premature EOI"); | |
298 | goto out; | |
299 | } | |
300 | ||
9bada897 | 301 | if (token->type != JSON_COLON) { |
4a5fcab7 AL |
302 | parse_error(ctxt, token, "missing : in object pair"); |
303 | goto out; | |
304 | } | |
305 | ||
65c0f1e9 | 306 | value = parse_value(ctxt, ap); |
4a5fcab7 AL |
307 | if (value == NULL) { |
308 | parse_error(ctxt, token, "Missing value in dict"); | |
309 | goto out; | |
310 | } | |
311 | ||
532fb532 | 312 | qdict_put_obj(dict, qstring_get_str(key), value); |
4a5fcab7 | 313 | |
cb3e7f08 | 314 | qobject_unref(key); |
4a5fcab7 AL |
315 | |
316 | return 0; | |
317 | ||
318 | out: | |
cb3e7f08 | 319 | qobject_unref(key); |
4a5fcab7 AL |
320 | |
321 | return -1; | |
322 | } | |
323 | ||
65c0f1e9 | 324 | static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
325 | { |
326 | QDict *dict = NULL; | |
9bada897 | 327 | JSONToken *token, *peek; |
4a5fcab7 | 328 | |
65c0f1e9 | 329 | token = parser_context_pop_token(ctxt); |
9bada897 | 330 | assert(token && token->type == JSON_LCURLY); |
4a5fcab7 AL |
331 | |
332 | dict = qdict_new(); | |
333 | ||
65c0f1e9 | 334 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
335 | if (peek == NULL) { |
336 | parse_error(ctxt, NULL, "premature EOI"); | |
337 | goto out; | |
338 | } | |
339 | ||
9bada897 | 340 | if (peek->type != JSON_RCURLY) { |
65c0f1e9 | 341 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
342 | goto out; |
343 | } | |
344 | ||
65c0f1e9 | 345 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
346 | if (token == NULL) { |
347 | parse_error(ctxt, NULL, "premature EOI"); | |
348 | goto out; | |
349 | } | |
350 | ||
9bada897 PB |
351 | while (token->type != JSON_RCURLY) { |
352 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
353 | parse_error(ctxt, token, "expected separator in dict"); |
354 | goto out; | |
355 | } | |
4a5fcab7 | 356 | |
65c0f1e9 | 357 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
358 | goto out; |
359 | } | |
360 | ||
65c0f1e9 | 361 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
362 | if (token == NULL) { |
363 | parse_error(ctxt, NULL, "premature EOI"); | |
364 | goto out; | |
365 | } | |
4a5fcab7 | 366 | } |
4a5fcab7 | 367 | } else { |
a491af47 | 368 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
369 | } |
370 | ||
4a5fcab7 AL |
371 | return QOBJECT(dict); |
372 | ||
373 | out: | |
cb3e7f08 | 374 | qobject_unref(dict); |
4a5fcab7 AL |
375 | return NULL; |
376 | } | |
377 | ||
65c0f1e9 | 378 | static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
379 | { |
380 | QList *list = NULL; | |
9bada897 | 381 | JSONToken *token, *peek; |
4a5fcab7 | 382 | |
65c0f1e9 | 383 | token = parser_context_pop_token(ctxt); |
9bada897 | 384 | assert(token && token->type == JSON_LSQUARE); |
4a5fcab7 AL |
385 | |
386 | list = qlist_new(); | |
387 | ||
65c0f1e9 | 388 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
389 | if (peek == NULL) { |
390 | parse_error(ctxt, NULL, "premature EOI"); | |
391 | goto out; | |
392 | } | |
393 | ||
9bada897 | 394 | if (peek->type != JSON_RSQUARE) { |
4a5fcab7 AL |
395 | QObject *obj; |
396 | ||
65c0f1e9 | 397 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
398 | if (obj == NULL) { |
399 | parse_error(ctxt, token, "expecting value"); | |
400 | goto out; | |
401 | } | |
402 | ||
403 | qlist_append_obj(list, obj); | |
404 | ||
65c0f1e9 | 405 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
406 | if (token == NULL) { |
407 | parse_error(ctxt, NULL, "premature EOI"); | |
408 | goto out; | |
409 | } | |
410 | ||
9bada897 PB |
411 | while (token->type != JSON_RSQUARE) { |
412 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
413 | parse_error(ctxt, token, "expected separator in list"); |
414 | goto out; | |
415 | } | |
416 | ||
65c0f1e9 | 417 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
418 | if (obj == NULL) { |
419 | parse_error(ctxt, token, "expecting value"); | |
420 | goto out; | |
421 | } | |
422 | ||
423 | qlist_append_obj(list, obj); | |
424 | ||
65c0f1e9 | 425 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
426 | if (token == NULL) { |
427 | parse_error(ctxt, NULL, "premature EOI"); | |
428 | goto out; | |
429 | } | |
4a5fcab7 | 430 | } |
4a5fcab7 | 431 | } else { |
a491af47 | 432 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
433 | } |
434 | ||
4a5fcab7 AL |
435 | return QOBJECT(list); |
436 | ||
437 | out: | |
cb3e7f08 | 438 | qobject_unref(list); |
4a5fcab7 AL |
439 | return NULL; |
440 | } | |
441 | ||
65c0f1e9 | 442 | static QObject *parse_keyword(JSONParserContext *ctxt) |
4a5fcab7 | 443 | { |
9bada897 | 444 | JSONToken *token; |
4a5fcab7 | 445 | |
65c0f1e9 | 446 | token = parser_context_pop_token(ctxt); |
9bada897 | 447 | assert(token && token->type == JSON_KEYWORD); |
50e2a467 | 448 | |
9bada897 | 449 | if (!strcmp(token->str, "true")) { |
d538b255 | 450 | return QOBJECT(qbool_from_bool(true)); |
9bada897 | 451 | } else if (!strcmp(token->str, "false")) { |
d538b255 | 452 | return QOBJECT(qbool_from_bool(false)); |
9bada897 | 453 | } else if (!strcmp(token->str, "null")) { |
006ca09f | 454 | return QOBJECT(qnull()); |
4a5fcab7 | 455 | } |
9bada897 | 456 | parse_error(ctxt, token, "invalid keyword '%s'", token->str); |
4a5fcab7 AL |
457 | return NULL; |
458 | } | |
459 | ||
65c0f1e9 | 460 | static QObject *parse_escape(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 461 | { |
9bada897 | 462 | JSONToken *token; |
4a5fcab7 AL |
463 | |
464 | if (ap == NULL) { | |
d538b255 | 465 | return NULL; |
4a5fcab7 AL |
466 | } |
467 | ||
65c0f1e9 | 468 | token = parser_context_pop_token(ctxt); |
9bada897 | 469 | assert(token && token->type == JSON_ESCAPE); |
6b9606f6 | 470 | |
9bada897 | 471 | if (!strcmp(token->str, "%p")) { |
d538b255 | 472 | return va_arg(*ap, QObject *); |
9bada897 | 473 | } else if (!strcmp(token->str, "%i")) { |
d538b255 | 474 | return QOBJECT(qbool_from_bool(va_arg(*ap, int))); |
9bada897 | 475 | } else if (!strcmp(token->str, "%d")) { |
01b2ffce | 476 | return QOBJECT(qnum_from_int(va_arg(*ap, int))); |
9bada897 | 477 | } else if (!strcmp(token->str, "%ld")) { |
01b2ffce | 478 | return QOBJECT(qnum_from_int(va_arg(*ap, long))); |
9bada897 PB |
479 | } else if (!strcmp(token->str, "%lld") || |
480 | !strcmp(token->str, "%I64d")) { | |
01b2ffce | 481 | return QOBJECT(qnum_from_int(va_arg(*ap, long long))); |
2bc7cfea MAL |
482 | } else if (!strcmp(token->str, "%u")) { |
483 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned int))); | |
484 | } else if (!strcmp(token->str, "%lu")) { | |
485 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long))); | |
486 | } else if (!strcmp(token->str, "%llu") || | |
487 | !strcmp(token->str, "%I64u")) { | |
488 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long long))); | |
9bada897 | 489 | } else if (!strcmp(token->str, "%s")) { |
d538b255 | 490 | return QOBJECT(qstring_from_str(va_arg(*ap, const char *))); |
9bada897 | 491 | } else if (!strcmp(token->str, "%f")) { |
01b2ffce | 492 | return QOBJECT(qnum_from_double(va_arg(*ap, double))); |
4a5fcab7 | 493 | } |
4a5fcab7 AL |
494 | return NULL; |
495 | } | |
496 | ||
65c0f1e9 | 497 | static QObject *parse_literal(JSONParserContext *ctxt) |
4a5fcab7 | 498 | { |
9bada897 | 499 | JSONToken *token; |
4a5fcab7 | 500 | |
65c0f1e9 | 501 | token = parser_context_pop_token(ctxt); |
d538b255 | 502 | assert(token); |
11e8a46c | 503 | |
9bada897 | 504 | switch (token->type) { |
4a5fcab7 | 505 | case JSON_STRING: |
d538b255 | 506 | return QOBJECT(qstring_from_escaped_str(ctxt, token)); |
3d5b3ec6 | 507 | case JSON_INTEGER: { |
01b2ffce MAL |
508 | /* |
509 | * Represent JSON_INTEGER as QNUM_I64 if possible, else as | |
2bc7cfea MAL |
510 | * QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64() |
511 | * and qemu_strtou64() fail with ERANGE when it's not | |
512 | * possible. | |
3d5b3ec6 | 513 | * |
01b2ffce | 514 | * qnum_get_int() will then work for any signed 64-bit |
2bc7cfea MAL |
515 | * JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit |
516 | * integer, and qnum_get_double() both for any JSON_INTEGER | |
517 | * and any JSON_FLOAT (with precision loss for integers beyond | |
518 | * 53 bits) | |
3d5b3ec6 | 519 | */ |
2bc7cfea | 520 | int ret; |
3d5b3ec6 | 521 | int64_t value; |
2bc7cfea | 522 | uint64_t uvalue; |
3d5b3ec6 | 523 | |
2bc7cfea MAL |
524 | ret = qemu_strtoi64(token->str, NULL, 10, &value); |
525 | if (!ret) { | |
01b2ffce | 526 | return QOBJECT(qnum_from_int(value)); |
3d5b3ec6 | 527 | } |
2bc7cfea MAL |
528 | assert(ret == -ERANGE); |
529 | ||
530 | if (token->str[0] != '-') { | |
531 | ret = qemu_strtou64(token->str, NULL, 10, &uvalue); | |
532 | if (!ret) { | |
533 | return QOBJECT(qnum_from_uint(uvalue)); | |
534 | } | |
535 | assert(ret == -ERANGE); | |
536 | } | |
3d5b3ec6 MR |
537 | /* fall through to JSON_FLOAT */ |
538 | } | |
4a5fcab7 | 539 | case JSON_FLOAT: |
6e8e5cb9 EB |
540 | /* FIXME dependent on locale; a pervasive issue in QEMU */ |
541 | /* FIXME our lexer matches RFC 7159 in forbidding Inf or NaN, | |
542 | * but those might be useful extensions beyond JSON */ | |
01b2ffce | 543 | return QOBJECT(qnum_from_double(strtod(token->str, NULL))); |
4a5fcab7 | 544 | default: |
d538b255 | 545 | abort(); |
4a5fcab7 | 546 | } |
4a5fcab7 AL |
547 | } |
548 | ||
65c0f1e9 | 549 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 550 | { |
9bada897 | 551 | JSONToken *token; |
4a5fcab7 | 552 | |
d538b255 MA |
553 | token = parser_context_peek_token(ctxt); |
554 | if (token == NULL) { | |
555 | parse_error(ctxt, NULL, "premature EOI"); | |
556 | return NULL; | |
4a5fcab7 AL |
557 | } |
558 | ||
9bada897 | 559 | switch (token->type) { |
d538b255 MA |
560 | case JSON_LCURLY: |
561 | return parse_object(ctxt, ap); | |
562 | case JSON_LSQUARE: | |
563 | return parse_array(ctxt, ap); | |
564 | case JSON_ESCAPE: | |
565 | return parse_escape(ctxt, ap); | |
566 | case JSON_INTEGER: | |
567 | case JSON_FLOAT: | |
568 | case JSON_STRING: | |
569 | return parse_literal(ctxt); | |
570 | case JSON_KEYWORD: | |
571 | return parse_keyword(ctxt); | |
572 | default: | |
573 | parse_error(ctxt, token, "expecting value"); | |
574 | return NULL; | |
575 | } | |
4a5fcab7 AL |
576 | } |
577 | ||
95385fe9 | 578 | QObject *json_parser_parse(GQueue *tokens, va_list *ap) |
ef749d07 AL |
579 | { |
580 | return json_parser_parse_err(tokens, ap, NULL); | |
581 | } | |
582 | ||
95385fe9 | 583 | QObject *json_parser_parse_err(GQueue *tokens, va_list *ap, Error **errp) |
4a5fcab7 | 584 | { |
65c0f1e9 | 585 | JSONParserContext *ctxt = parser_context_new(tokens); |
4a5fcab7 AL |
586 | QObject *result; |
587 | ||
65c0f1e9 | 588 | if (!ctxt) { |
c1990ebf MR |
589 | return NULL; |
590 | } | |
4a5fcab7 | 591 | |
65c0f1e9 MR |
592 | result = parse_value(ctxt, ap); |
593 | ||
594 | error_propagate(errp, ctxt->err); | |
4a5fcab7 | 595 | |
65c0f1e9 | 596 | parser_context_free(ctxt); |
ef749d07 | 597 | |
4a5fcab7 AL |
598 | return result; |
599 | } |