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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" |
e59f39d4 | 16 | #include "qemu/unicode.h" |
da34e65c | 17 | #include "qapi/error.h" |
4a5fcab7 | 18 | #include "qemu-common.h" |
6b673957 | 19 | #include "qapi/qmp/qbool.h" |
452fcdbc | 20 | #include "qapi/qmp/qdict.h" |
47e6b297 | 21 | #include "qapi/qmp/qlist.h" |
15280c36 MA |
22 | #include "qapi/qmp/qnull.h" |
23 | #include "qapi/qmp/qnum.h" | |
6b673957 | 24 | #include "qapi/qmp/qstring.h" |
7b1b5d19 PB |
25 | #include "qapi/qmp/json-parser.h" |
26 | #include "qapi/qmp/json-lexer.h" | |
9bada897 | 27 | #include "qapi/qmp/json-streamer.h" |
4a5fcab7 AL |
28 | |
29 | typedef struct JSONParserContext | |
30 | { | |
ef749d07 | 31 | Error *err; |
9bada897 | 32 | JSONToken *current; |
95385fe9 | 33 | GQueue *buf; |
4a5fcab7 AL |
34 | } JSONParserContext; |
35 | ||
36 | #define BUG_ON(cond) assert(!(cond)) | |
37 | ||
38 | /** | |
39 | * TODO | |
40 | * | |
41 | * 0) make errors meaningful again | |
42 | * 1) add geometry information to tokens | |
43 | * 3) should we return a parsed size? | |
44 | * 4) deal with premature EOI | |
45 | */ | |
46 | ||
65c0f1e9 | 47 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap); |
4a5fcab7 | 48 | |
4a5fcab7 AL |
49 | /** |
50 | * Error handler | |
51 | */ | |
8b7968f7 | 52 | static void GCC_FMT_ATTR(3, 4) parse_error(JSONParserContext *ctxt, |
9bada897 | 53 | JSONToken *token, const char *msg, ...) |
4a5fcab7 | 54 | { |
c96c84a9 | 55 | va_list ap; |
ef749d07 | 56 | char message[1024]; |
574bf16f MA |
57 | |
58 | if (ctxt->err) { | |
59 | return; | |
60 | } | |
c96c84a9 | 61 | va_start(ap, msg); |
ef749d07 | 62 | vsnprintf(message, sizeof(message), msg, ap); |
c96c84a9 | 63 | va_end(ap); |
f231b88d | 64 | error_setg(&ctxt->err, "JSON parse error, %s", message); |
4a5fcab7 AL |
65 | } |
66 | ||
dc45a07c | 67 | static int cvt4hex(const char *s) |
4a5fcab7 | 68 | { |
dc45a07c MA |
69 | int cp, i; |
70 | ||
71 | cp = 0; | |
72 | for (i = 0; i < 4; i++) { | |
73 | if (!qemu_isxdigit(s[i])) { | |
74 | return -1; | |
75 | } | |
76 | cp <<= 4; | |
77 | if (s[i] >= '0' && s[i] <= '9') { | |
78 | cp |= s[i] - '0'; | |
79 | } else if (s[i] >= 'a' && s[i] <= 'f') { | |
80 | cp |= 10 + s[i] - 'a'; | |
81 | } else if (s[i] >= 'A' && s[i] <= 'F') { | |
82 | cp |= 10 + s[i] - 'A'; | |
83 | } else { | |
84 | return -1; | |
85 | } | |
4a5fcab7 | 86 | } |
dc45a07c | 87 | return cp; |
4a5fcab7 AL |
88 | } |
89 | ||
90 | /** | |
b2da4a4d | 91 | * parse_string(): Parse a JSON string |
4a5fcab7 | 92 | * |
b2da4a4d MA |
93 | * From RFC 8259 "The JavaScript Object Notation (JSON) Data |
94 | * Interchange Format": | |
95 | * | |
96 | * char = unescaped / | |
97 | * escape ( | |
98 | * %x22 / ; " quotation mark U+0022 | |
99 | * %x5C / ; \ reverse solidus U+005C | |
100 | * %x2F / ; / solidus U+002F | |
101 | * %x62 / ; b backspace U+0008 | |
102 | * %x66 / ; f form feed U+000C | |
103 | * %x6E / ; n line feed U+000A | |
104 | * %x72 / ; r carriage return U+000D | |
105 | * %x74 / ; t tab U+0009 | |
106 | * %x75 4HEXDIG ) ; uXXXX U+XXXX | |
107 | * escape = %x5C ; \ | |
108 | * quotation-mark = %x22 ; " | |
109 | * unescaped = %x20-21 / %x23-5B / %x5D-10FFFF | |
110 | * | |
111 | * Extensions over RFC 8259: | |
112 | * - Extra escape sequence in strings: | |
113 | * 0x27 (apostrophe) is recognized after escape, too | |
114 | * - Single-quoted strings: | |
115 | * Like double-quoted strings, except they're delimited by %x27 | |
116 | * (apostrophe) instead of %x22 (quotation mark), and can't contain | |
117 | * unescaped apostrophe, but can contain unescaped quotation mark. | |
118 | * | |
119 | * Note: | |
120 | * - Encoding is modified UTF-8. | |
121 | * - Invalid Unicode characters are rejected. | |
122 | * - Control characters \x00..\x1F are rejected by the lexer. | |
4a5fcab7 | 123 | */ |
b2da4a4d | 124 | static QString *parse_string(JSONParserContext *ctxt, JSONToken *token) |
4a5fcab7 | 125 | { |
9bada897 | 126 | const char *ptr = token->str; |
4a5fcab7 | 127 | QString *str; |
00ea57fa | 128 | char quote; |
dc45a07c MA |
129 | const char *beg; |
130 | int cp, trailing; | |
e59f39d4 MA |
131 | char *end; |
132 | ssize_t len; | |
133 | char utf8_buf[5]; | |
4a5fcab7 | 134 | |
00ea57fa MA |
135 | assert(*ptr == '"' || *ptr == '\''); |
136 | quote = *ptr++; | |
4a5fcab7 | 137 | str = qstring_new(); |
00ea57fa MA |
138 | |
139 | while (*ptr != quote) { | |
140 | assert(*ptr); | |
4a5fcab7 | 141 | if (*ptr == '\\') { |
dc45a07c | 142 | beg = ptr++; |
00ea57fa | 143 | switch (*ptr++) { |
4a5fcab7 | 144 | case '"': |
de6decfe | 145 | qstring_append_chr(str, '"'); |
4a5fcab7 AL |
146 | break; |
147 | case '\'': | |
de6decfe | 148 | qstring_append_chr(str, '\''); |
4a5fcab7 AL |
149 | break; |
150 | case '\\': | |
de6decfe | 151 | qstring_append_chr(str, '\\'); |
4a5fcab7 AL |
152 | break; |
153 | case '/': | |
de6decfe | 154 | qstring_append_chr(str, '/'); |
4a5fcab7 AL |
155 | break; |
156 | case 'b': | |
de6decfe | 157 | qstring_append_chr(str, '\b'); |
4a5fcab7 | 158 | break; |
bd032695 | 159 | case 'f': |
de6decfe | 160 | qstring_append_chr(str, '\f'); |
bd032695 | 161 | break; |
4a5fcab7 | 162 | case 'n': |
de6decfe | 163 | qstring_append_chr(str, '\n'); |
4a5fcab7 AL |
164 | break; |
165 | case 'r': | |
de6decfe | 166 | qstring_append_chr(str, '\r'); |
4a5fcab7 AL |
167 | break; |
168 | case 't': | |
de6decfe | 169 | qstring_append_chr(str, '\t'); |
4a5fcab7 | 170 | break; |
de6decfe | 171 | case 'u': |
dc45a07c MA |
172 | cp = cvt4hex(ptr); |
173 | ptr += 4; | |
174 | ||
175 | /* handle surrogate pairs */ | |
176 | if (cp >= 0xD800 && cp <= 0xDBFF | |
177 | && ptr[0] == '\\' && ptr[1] == 'u') { | |
178 | /* leading surrogate followed by \u */ | |
179 | cp = 0x10000 + ((cp & 0x3FF) << 10); | |
180 | trailing = cvt4hex(ptr + 2); | |
181 | if (trailing >= 0xDC00 && trailing <= 0xDFFF) { | |
182 | /* followed by trailing surrogate */ | |
183 | cp |= trailing & 0x3FF; | |
184 | ptr += 6; | |
185 | } else { | |
186 | cp = -1; /* invalid */ | |
4a5fcab7 | 187 | } |
4a5fcab7 AL |
188 | } |
189 | ||
46a628b1 MA |
190 | if (mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp) < 0) { |
191 | parse_error(ctxt, token, | |
dc45a07c MA |
192 | "%.*s is not a valid Unicode character", |
193 | (int)(ptr - beg), beg); | |
46a628b1 MA |
194 | goto out; |
195 | } | |
de6decfe MA |
196 | qstring_append(str, utf8_buf); |
197 | break; | |
4a5fcab7 AL |
198 | default: |
199 | parse_error(ctxt, token, "invalid escape sequence in string"); | |
200 | goto out; | |
201 | } | |
202 | } else { | |
e59f39d4 | 203 | cp = mod_utf8_codepoint(ptr, 6, &end); |
4b1c0cd7 | 204 | if (cp < 0) { |
e59f39d4 MA |
205 | parse_error(ctxt, token, "invalid UTF-8 sequence in string"); |
206 | goto out; | |
207 | } | |
208 | ptr = end; | |
209 | len = mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp); | |
210 | assert(len >= 0); | |
211 | qstring_append(str, utf8_buf); | |
4a5fcab7 AL |
212 | } |
213 | } | |
214 | ||
4a5fcab7 AL |
215 | return str; |
216 | ||
217 | out: | |
cb3e7f08 | 218 | qobject_unref(str); |
4a5fcab7 AL |
219 | return NULL; |
220 | } | |
221 | ||
9bada897 PB |
222 | /* Note: the token object returned by parser_context_peek_token or |
223 | * parser_context_pop_token is deleted as soon as parser_context_pop_token | |
224 | * is called again. | |
95385fe9 | 225 | */ |
9bada897 | 226 | static JSONToken *parser_context_pop_token(JSONParserContext *ctxt) |
65c0f1e9 | 227 | { |
9bada897 | 228 | g_free(ctxt->current); |
95385fe9 PB |
229 | assert(!g_queue_is_empty(ctxt->buf)); |
230 | ctxt->current = g_queue_pop_head(ctxt->buf); | |
231 | return ctxt->current; | |
65c0f1e9 MR |
232 | } |
233 | ||
9bada897 | 234 | static JSONToken *parser_context_peek_token(JSONParserContext *ctxt) |
65c0f1e9 | 235 | { |
95385fe9 PB |
236 | assert(!g_queue_is_empty(ctxt->buf)); |
237 | return g_queue_peek_head(ctxt->buf); | |
65c0f1e9 MR |
238 | } |
239 | ||
95385fe9 | 240 | static JSONParserContext *parser_context_new(GQueue *tokens) |
65c0f1e9 MR |
241 | { |
242 | JSONParserContext *ctxt; | |
65c0f1e9 MR |
243 | |
244 | if (!tokens) { | |
245 | return NULL; | |
246 | } | |
247 | ||
65c0f1e9 | 248 | ctxt = g_malloc0(sizeof(JSONParserContext)); |
95385fe9 | 249 | ctxt->buf = tokens; |
65c0f1e9 MR |
250 | |
251 | return ctxt; | |
252 | } | |
253 | ||
254 | /* to support error propagation, ctxt->err must be freed separately */ | |
255 | static void parser_context_free(JSONParserContext *ctxt) | |
256 | { | |
65c0f1e9 | 257 | if (ctxt) { |
95385fe9 PB |
258 | while (!g_queue_is_empty(ctxt->buf)) { |
259 | parser_context_pop_token(ctxt); | |
65c0f1e9 | 260 | } |
9bada897 | 261 | g_free(ctxt->current); |
95385fe9 | 262 | g_queue_free(ctxt->buf); |
65c0f1e9 MR |
263 | g_free(ctxt); |
264 | } | |
265 | } | |
266 | ||
4a5fcab7 AL |
267 | /** |
268 | * Parsing rules | |
269 | */ | |
65c0f1e9 | 270 | static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) |
4a5fcab7 | 271 | { |
532fb532 HR |
272 | QObject *value; |
273 | QString *key = NULL; | |
9bada897 | 274 | JSONToken *peek, *token; |
4a5fcab7 | 275 | |
65c0f1e9 | 276 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
277 | if (peek == NULL) { |
278 | parse_error(ctxt, NULL, "premature EOI"); | |
279 | goto out; | |
280 | } | |
281 | ||
532fb532 HR |
282 | key = qobject_to(QString, parse_value(ctxt, ap)); |
283 | if (!key) { | |
4a5fcab7 AL |
284 | parse_error(ctxt, peek, "key is not a string in object"); |
285 | goto out; | |
286 | } | |
287 | ||
65c0f1e9 | 288 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
289 | if (token == NULL) { |
290 | parse_error(ctxt, NULL, "premature EOI"); | |
291 | goto out; | |
292 | } | |
293 | ||
9bada897 | 294 | if (token->type != JSON_COLON) { |
4a5fcab7 AL |
295 | parse_error(ctxt, token, "missing : in object pair"); |
296 | goto out; | |
297 | } | |
298 | ||
65c0f1e9 | 299 | value = parse_value(ctxt, ap); |
4a5fcab7 AL |
300 | if (value == NULL) { |
301 | parse_error(ctxt, token, "Missing value in dict"); | |
302 | goto out; | |
303 | } | |
304 | ||
532fb532 | 305 | qdict_put_obj(dict, qstring_get_str(key), value); |
4a5fcab7 | 306 | |
cb3e7f08 | 307 | qobject_unref(key); |
4a5fcab7 AL |
308 | |
309 | return 0; | |
310 | ||
311 | out: | |
cb3e7f08 | 312 | qobject_unref(key); |
4a5fcab7 AL |
313 | |
314 | return -1; | |
315 | } | |
316 | ||
65c0f1e9 | 317 | static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
318 | { |
319 | QDict *dict = NULL; | |
9bada897 | 320 | JSONToken *token, *peek; |
4a5fcab7 | 321 | |
65c0f1e9 | 322 | token = parser_context_pop_token(ctxt); |
9bada897 | 323 | assert(token && token->type == JSON_LCURLY); |
4a5fcab7 AL |
324 | |
325 | dict = qdict_new(); | |
326 | ||
65c0f1e9 | 327 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
328 | if (peek == NULL) { |
329 | parse_error(ctxt, NULL, "premature EOI"); | |
330 | goto out; | |
331 | } | |
332 | ||
9bada897 | 333 | if (peek->type != JSON_RCURLY) { |
65c0f1e9 | 334 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
335 | goto out; |
336 | } | |
337 | ||
65c0f1e9 | 338 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
339 | if (token == NULL) { |
340 | parse_error(ctxt, NULL, "premature EOI"); | |
341 | goto out; | |
342 | } | |
343 | ||
9bada897 PB |
344 | while (token->type != JSON_RCURLY) { |
345 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
346 | parse_error(ctxt, token, "expected separator in dict"); |
347 | goto out; | |
348 | } | |
4a5fcab7 | 349 | |
65c0f1e9 | 350 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
351 | goto out; |
352 | } | |
353 | ||
65c0f1e9 | 354 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
355 | if (token == NULL) { |
356 | parse_error(ctxt, NULL, "premature EOI"); | |
357 | goto out; | |
358 | } | |
4a5fcab7 | 359 | } |
4a5fcab7 | 360 | } else { |
a491af47 | 361 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
362 | } |
363 | ||
4a5fcab7 AL |
364 | return QOBJECT(dict); |
365 | ||
366 | out: | |
cb3e7f08 | 367 | qobject_unref(dict); |
4a5fcab7 AL |
368 | return NULL; |
369 | } | |
370 | ||
65c0f1e9 | 371 | static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
372 | { |
373 | QList *list = NULL; | |
9bada897 | 374 | JSONToken *token, *peek; |
4a5fcab7 | 375 | |
65c0f1e9 | 376 | token = parser_context_pop_token(ctxt); |
9bada897 | 377 | assert(token && token->type == JSON_LSQUARE); |
4a5fcab7 AL |
378 | |
379 | list = qlist_new(); | |
380 | ||
65c0f1e9 | 381 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
382 | if (peek == NULL) { |
383 | parse_error(ctxt, NULL, "premature EOI"); | |
384 | goto out; | |
385 | } | |
386 | ||
9bada897 | 387 | if (peek->type != JSON_RSQUARE) { |
4a5fcab7 AL |
388 | QObject *obj; |
389 | ||
65c0f1e9 | 390 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
391 | if (obj == NULL) { |
392 | parse_error(ctxt, token, "expecting value"); | |
393 | goto out; | |
394 | } | |
395 | ||
396 | qlist_append_obj(list, obj); | |
397 | ||
65c0f1e9 | 398 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
399 | if (token == NULL) { |
400 | parse_error(ctxt, NULL, "premature EOI"); | |
401 | goto out; | |
402 | } | |
403 | ||
9bada897 PB |
404 | while (token->type != JSON_RSQUARE) { |
405 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
406 | parse_error(ctxt, token, "expected separator in list"); |
407 | goto out; | |
408 | } | |
409 | ||
65c0f1e9 | 410 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
411 | if (obj == NULL) { |
412 | parse_error(ctxt, token, "expecting value"); | |
413 | goto out; | |
414 | } | |
415 | ||
416 | qlist_append_obj(list, obj); | |
417 | ||
65c0f1e9 | 418 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
419 | if (token == NULL) { |
420 | parse_error(ctxt, NULL, "premature EOI"); | |
421 | goto out; | |
422 | } | |
4a5fcab7 | 423 | } |
4a5fcab7 | 424 | } else { |
a491af47 | 425 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
426 | } |
427 | ||
4a5fcab7 AL |
428 | return QOBJECT(list); |
429 | ||
430 | out: | |
cb3e7f08 | 431 | qobject_unref(list); |
4a5fcab7 AL |
432 | return NULL; |
433 | } | |
434 | ||
65c0f1e9 | 435 | static QObject *parse_keyword(JSONParserContext *ctxt) |
4a5fcab7 | 436 | { |
9bada897 | 437 | JSONToken *token; |
4a5fcab7 | 438 | |
65c0f1e9 | 439 | token = parser_context_pop_token(ctxt); |
9bada897 | 440 | assert(token && token->type == JSON_KEYWORD); |
50e2a467 | 441 | |
9bada897 | 442 | if (!strcmp(token->str, "true")) { |
d538b255 | 443 | return QOBJECT(qbool_from_bool(true)); |
9bada897 | 444 | } else if (!strcmp(token->str, "false")) { |
d538b255 | 445 | return QOBJECT(qbool_from_bool(false)); |
9bada897 | 446 | } else if (!strcmp(token->str, "null")) { |
006ca09f | 447 | return QOBJECT(qnull()); |
4a5fcab7 | 448 | } |
9bada897 | 449 | parse_error(ctxt, token, "invalid keyword '%s'", token->str); |
4a5fcab7 AL |
450 | return NULL; |
451 | } | |
452 | ||
65c0f1e9 | 453 | static QObject *parse_escape(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 454 | { |
9bada897 | 455 | JSONToken *token; |
4a5fcab7 AL |
456 | |
457 | if (ap == NULL) { | |
d538b255 | 458 | return NULL; |
4a5fcab7 AL |
459 | } |
460 | ||
65c0f1e9 | 461 | token = parser_context_pop_token(ctxt); |
9bada897 | 462 | assert(token && token->type == JSON_ESCAPE); |
6b9606f6 | 463 | |
9bada897 | 464 | if (!strcmp(token->str, "%p")) { |
d538b255 | 465 | return va_arg(*ap, QObject *); |
9bada897 | 466 | } else if (!strcmp(token->str, "%i")) { |
d538b255 | 467 | return QOBJECT(qbool_from_bool(va_arg(*ap, int))); |
9bada897 | 468 | } else if (!strcmp(token->str, "%d")) { |
01b2ffce | 469 | return QOBJECT(qnum_from_int(va_arg(*ap, int))); |
9bada897 | 470 | } else if (!strcmp(token->str, "%ld")) { |
01b2ffce | 471 | return QOBJECT(qnum_from_int(va_arg(*ap, long))); |
9bada897 PB |
472 | } else if (!strcmp(token->str, "%lld") || |
473 | !strcmp(token->str, "%I64d")) { | |
01b2ffce | 474 | return QOBJECT(qnum_from_int(va_arg(*ap, long long))); |
2bc7cfea MAL |
475 | } else if (!strcmp(token->str, "%u")) { |
476 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned int))); | |
477 | } else if (!strcmp(token->str, "%lu")) { | |
478 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long))); | |
479 | } else if (!strcmp(token->str, "%llu") || | |
480 | !strcmp(token->str, "%I64u")) { | |
481 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long long))); | |
9bada897 | 482 | } else if (!strcmp(token->str, "%s")) { |
d538b255 | 483 | return QOBJECT(qstring_from_str(va_arg(*ap, const char *))); |
9bada897 | 484 | } else if (!strcmp(token->str, "%f")) { |
01b2ffce | 485 | return QOBJECT(qnum_from_double(va_arg(*ap, double))); |
4a5fcab7 | 486 | } |
4a5fcab7 AL |
487 | return NULL; |
488 | } | |
489 | ||
65c0f1e9 | 490 | static QObject *parse_literal(JSONParserContext *ctxt) |
4a5fcab7 | 491 | { |
9bada897 | 492 | JSONToken *token; |
4a5fcab7 | 493 | |
65c0f1e9 | 494 | token = parser_context_pop_token(ctxt); |
d538b255 | 495 | assert(token); |
11e8a46c | 496 | |
9bada897 | 497 | switch (token->type) { |
4a5fcab7 | 498 | case JSON_STRING: |
b2da4a4d | 499 | return QOBJECT(parse_string(ctxt, token)); |
3d5b3ec6 | 500 | case JSON_INTEGER: { |
01b2ffce MAL |
501 | /* |
502 | * Represent JSON_INTEGER as QNUM_I64 if possible, else as | |
2bc7cfea MAL |
503 | * QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64() |
504 | * and qemu_strtou64() fail with ERANGE when it's not | |
505 | * possible. | |
3d5b3ec6 | 506 | * |
01b2ffce | 507 | * qnum_get_int() will then work for any signed 64-bit |
2bc7cfea MAL |
508 | * JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit |
509 | * integer, and qnum_get_double() both for any JSON_INTEGER | |
510 | * and any JSON_FLOAT (with precision loss for integers beyond | |
511 | * 53 bits) | |
3d5b3ec6 | 512 | */ |
2bc7cfea | 513 | int ret; |
3d5b3ec6 | 514 | int64_t value; |
2bc7cfea | 515 | uint64_t uvalue; |
3d5b3ec6 | 516 | |
2bc7cfea MAL |
517 | ret = qemu_strtoi64(token->str, NULL, 10, &value); |
518 | if (!ret) { | |
01b2ffce | 519 | return QOBJECT(qnum_from_int(value)); |
3d5b3ec6 | 520 | } |
2bc7cfea MAL |
521 | assert(ret == -ERANGE); |
522 | ||
523 | if (token->str[0] != '-') { | |
524 | ret = qemu_strtou64(token->str, NULL, 10, &uvalue); | |
525 | if (!ret) { | |
526 | return QOBJECT(qnum_from_uint(uvalue)); | |
527 | } | |
528 | assert(ret == -ERANGE); | |
529 | } | |
3d5b3ec6 MR |
530 | /* fall through to JSON_FLOAT */ |
531 | } | |
4a5fcab7 | 532 | case JSON_FLOAT: |
6e8e5cb9 EB |
533 | /* FIXME dependent on locale; a pervasive issue in QEMU */ |
534 | /* FIXME our lexer matches RFC 7159 in forbidding Inf or NaN, | |
535 | * but those might be useful extensions beyond JSON */ | |
01b2ffce | 536 | return QOBJECT(qnum_from_double(strtod(token->str, NULL))); |
4a5fcab7 | 537 | default: |
d538b255 | 538 | abort(); |
4a5fcab7 | 539 | } |
4a5fcab7 AL |
540 | } |
541 | ||
65c0f1e9 | 542 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 543 | { |
9bada897 | 544 | JSONToken *token; |
4a5fcab7 | 545 | |
d538b255 MA |
546 | token = parser_context_peek_token(ctxt); |
547 | if (token == NULL) { | |
548 | parse_error(ctxt, NULL, "premature EOI"); | |
549 | return NULL; | |
4a5fcab7 AL |
550 | } |
551 | ||
9bada897 | 552 | switch (token->type) { |
d538b255 MA |
553 | case JSON_LCURLY: |
554 | return parse_object(ctxt, ap); | |
555 | case JSON_LSQUARE: | |
556 | return parse_array(ctxt, ap); | |
557 | case JSON_ESCAPE: | |
558 | return parse_escape(ctxt, ap); | |
559 | case JSON_INTEGER: | |
560 | case JSON_FLOAT: | |
561 | case JSON_STRING: | |
562 | return parse_literal(ctxt); | |
563 | case JSON_KEYWORD: | |
564 | return parse_keyword(ctxt); | |
565 | default: | |
566 | parse_error(ctxt, token, "expecting value"); | |
567 | return NULL; | |
568 | } | |
4a5fcab7 AL |
569 | } |
570 | ||
95385fe9 | 571 | QObject *json_parser_parse(GQueue *tokens, va_list *ap) |
ef749d07 AL |
572 | { |
573 | return json_parser_parse_err(tokens, ap, NULL); | |
574 | } | |
575 | ||
95385fe9 | 576 | QObject *json_parser_parse_err(GQueue *tokens, va_list *ap, Error **errp) |
4a5fcab7 | 577 | { |
65c0f1e9 | 578 | JSONParserContext *ctxt = parser_context_new(tokens); |
4a5fcab7 AL |
579 | QObject *result; |
580 | ||
65c0f1e9 | 581 | if (!ctxt) { |
c1990ebf MR |
582 | return NULL; |
583 | } | |
4a5fcab7 | 584 | |
65c0f1e9 MR |
585 | result = parse_value(ctxt, ap); |
586 | ||
587 | error_propagate(errp, ctxt->err); | |
4a5fcab7 | 588 | |
65c0f1e9 | 589 | parser_context_free(ctxt); |
ef749d07 | 590 | |
4a5fcab7 AL |
591 | return result; |
592 | } |