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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" |
86cdf9ec | 25 | #include "json-parser-int.h" |
4a5fcab7 | 26 | |
abe7c206 MA |
27 | struct JSONToken { |
28 | JSONTokenType type; | |
29 | int x; | |
30 | int y; | |
31 | char str[]; | |
32 | }; | |
33 | ||
4a5fcab7 AL |
34 | typedef struct JSONParserContext |
35 | { | |
ef749d07 | 36 | Error *err; |
9bada897 | 37 | JSONToken *current; |
95385fe9 | 38 | GQueue *buf; |
4a5fcab7 AL |
39 | } JSONParserContext; |
40 | ||
41 | #define BUG_ON(cond) assert(!(cond)) | |
42 | ||
43 | /** | |
44 | * TODO | |
45 | * | |
46 | * 0) make errors meaningful again | |
47 | * 1) add geometry information to tokens | |
48 | * 3) should we return a parsed size? | |
49 | * 4) deal with premature EOI | |
50 | */ | |
51 | ||
65c0f1e9 | 52 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap); |
4a5fcab7 | 53 | |
4a5fcab7 AL |
54 | /** |
55 | * Error handler | |
56 | */ | |
8b7968f7 | 57 | static void GCC_FMT_ATTR(3, 4) parse_error(JSONParserContext *ctxt, |
9bada897 | 58 | JSONToken *token, const char *msg, ...) |
4a5fcab7 | 59 | { |
c96c84a9 | 60 | va_list ap; |
ef749d07 | 61 | char message[1024]; |
574bf16f MA |
62 | |
63 | if (ctxt->err) { | |
64 | return; | |
65 | } | |
c96c84a9 | 66 | va_start(ap, msg); |
ef749d07 | 67 | vsnprintf(message, sizeof(message), msg, ap); |
c96c84a9 | 68 | va_end(ap); |
f231b88d | 69 | error_setg(&ctxt->err, "JSON parse error, %s", message); |
4a5fcab7 AL |
70 | } |
71 | ||
dc45a07c | 72 | static int cvt4hex(const char *s) |
4a5fcab7 | 73 | { |
dc45a07c MA |
74 | int cp, i; |
75 | ||
76 | cp = 0; | |
77 | for (i = 0; i < 4; i++) { | |
78 | if (!qemu_isxdigit(s[i])) { | |
79 | return -1; | |
80 | } | |
81 | cp <<= 4; | |
82 | if (s[i] >= '0' && s[i] <= '9') { | |
83 | cp |= s[i] - '0'; | |
84 | } else if (s[i] >= 'a' && s[i] <= 'f') { | |
85 | cp |= 10 + s[i] - 'a'; | |
86 | } else if (s[i] >= 'A' && s[i] <= 'F') { | |
87 | cp |= 10 + s[i] - 'A'; | |
88 | } else { | |
89 | return -1; | |
90 | } | |
4a5fcab7 | 91 | } |
dc45a07c | 92 | return cp; |
4a5fcab7 AL |
93 | } |
94 | ||
95 | /** | |
b2da4a4d | 96 | * parse_string(): Parse a JSON string |
4a5fcab7 | 97 | * |
b2da4a4d MA |
98 | * From RFC 8259 "The JavaScript Object Notation (JSON) Data |
99 | * Interchange Format": | |
100 | * | |
101 | * char = unescaped / | |
102 | * escape ( | |
103 | * %x22 / ; " quotation mark U+0022 | |
104 | * %x5C / ; \ reverse solidus U+005C | |
105 | * %x2F / ; / solidus U+002F | |
106 | * %x62 / ; b backspace U+0008 | |
107 | * %x66 / ; f form feed U+000C | |
108 | * %x6E / ; n line feed U+000A | |
109 | * %x72 / ; r carriage return U+000D | |
110 | * %x74 / ; t tab U+0009 | |
111 | * %x75 4HEXDIG ) ; uXXXX U+XXXX | |
112 | * escape = %x5C ; \ | |
113 | * quotation-mark = %x22 ; " | |
114 | * unescaped = %x20-21 / %x23-5B / %x5D-10FFFF | |
115 | * | |
116 | * Extensions over RFC 8259: | |
117 | * - Extra escape sequence in strings: | |
118 | * 0x27 (apostrophe) is recognized after escape, too | |
119 | * - Single-quoted strings: | |
120 | * Like double-quoted strings, except they're delimited by %x27 | |
121 | * (apostrophe) instead of %x22 (quotation mark), and can't contain | |
122 | * unescaped apostrophe, but can contain unescaped quotation mark. | |
123 | * | |
124 | * Note: | |
125 | * - Encoding is modified UTF-8. | |
126 | * - Invalid Unicode characters are rejected. | |
127 | * - Control characters \x00..\x1F are rejected by the lexer. | |
4a5fcab7 | 128 | */ |
b2da4a4d | 129 | static QString *parse_string(JSONParserContext *ctxt, JSONToken *token) |
4a5fcab7 | 130 | { |
9bada897 | 131 | const char *ptr = token->str; |
4a5fcab7 | 132 | QString *str; |
00ea57fa | 133 | char quote; |
dc45a07c MA |
134 | const char *beg; |
135 | int cp, trailing; | |
e59f39d4 MA |
136 | char *end; |
137 | ssize_t len; | |
138 | char utf8_buf[5]; | |
4a5fcab7 | 139 | |
00ea57fa MA |
140 | assert(*ptr == '"' || *ptr == '\''); |
141 | quote = *ptr++; | |
4a5fcab7 | 142 | str = qstring_new(); |
00ea57fa MA |
143 | |
144 | while (*ptr != quote) { | |
145 | assert(*ptr); | |
4a5fcab7 | 146 | if (*ptr == '\\') { |
dc45a07c | 147 | beg = ptr++; |
00ea57fa | 148 | switch (*ptr++) { |
4a5fcab7 | 149 | case '"': |
de6decfe | 150 | qstring_append_chr(str, '"'); |
4a5fcab7 AL |
151 | break; |
152 | case '\'': | |
de6decfe | 153 | qstring_append_chr(str, '\''); |
4a5fcab7 AL |
154 | break; |
155 | case '\\': | |
de6decfe | 156 | qstring_append_chr(str, '\\'); |
4a5fcab7 AL |
157 | break; |
158 | case '/': | |
de6decfe | 159 | qstring_append_chr(str, '/'); |
4a5fcab7 AL |
160 | break; |
161 | case 'b': | |
de6decfe | 162 | qstring_append_chr(str, '\b'); |
4a5fcab7 | 163 | break; |
bd032695 | 164 | case 'f': |
de6decfe | 165 | qstring_append_chr(str, '\f'); |
bd032695 | 166 | break; |
4a5fcab7 | 167 | case 'n': |
de6decfe | 168 | qstring_append_chr(str, '\n'); |
4a5fcab7 AL |
169 | break; |
170 | case 'r': | |
de6decfe | 171 | qstring_append_chr(str, '\r'); |
4a5fcab7 AL |
172 | break; |
173 | case 't': | |
de6decfe | 174 | qstring_append_chr(str, '\t'); |
4a5fcab7 | 175 | break; |
de6decfe | 176 | case 'u': |
dc45a07c MA |
177 | cp = cvt4hex(ptr); |
178 | ptr += 4; | |
179 | ||
180 | /* handle surrogate pairs */ | |
181 | if (cp >= 0xD800 && cp <= 0xDBFF | |
182 | && ptr[0] == '\\' && ptr[1] == 'u') { | |
183 | /* leading surrogate followed by \u */ | |
184 | cp = 0x10000 + ((cp & 0x3FF) << 10); | |
185 | trailing = cvt4hex(ptr + 2); | |
186 | if (trailing >= 0xDC00 && trailing <= 0xDFFF) { | |
187 | /* followed by trailing surrogate */ | |
188 | cp |= trailing & 0x3FF; | |
189 | ptr += 6; | |
190 | } else { | |
191 | cp = -1; /* invalid */ | |
4a5fcab7 | 192 | } |
4a5fcab7 AL |
193 | } |
194 | ||
46a628b1 MA |
195 | if (mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp) < 0) { |
196 | parse_error(ctxt, token, | |
dc45a07c MA |
197 | "%.*s is not a valid Unicode character", |
198 | (int)(ptr - beg), beg); | |
46a628b1 MA |
199 | goto out; |
200 | } | |
de6decfe MA |
201 | qstring_append(str, utf8_buf); |
202 | break; | |
4a5fcab7 AL |
203 | default: |
204 | parse_error(ctxt, token, "invalid escape sequence in string"); | |
205 | goto out; | |
206 | } | |
207 | } else { | |
e59f39d4 | 208 | cp = mod_utf8_codepoint(ptr, 6, &end); |
4b1c0cd7 | 209 | if (cp < 0) { |
e59f39d4 MA |
210 | parse_error(ctxt, token, "invalid UTF-8 sequence in string"); |
211 | goto out; | |
212 | } | |
213 | ptr = end; | |
214 | len = mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp); | |
215 | assert(len >= 0); | |
216 | qstring_append(str, utf8_buf); | |
4a5fcab7 AL |
217 | } |
218 | } | |
219 | ||
4a5fcab7 AL |
220 | return str; |
221 | ||
222 | out: | |
cb3e7f08 | 223 | qobject_unref(str); |
4a5fcab7 AL |
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 | ctxt->current = g_queue_pop_head(ctxt->buf); |
235 | return ctxt->current; | |
65c0f1e9 MR |
236 | } |
237 | ||
9bada897 | 238 | static JSONToken *parser_context_peek_token(JSONParserContext *ctxt) |
65c0f1e9 | 239 | { |
95385fe9 | 240 | return g_queue_peek_head(ctxt->buf); |
65c0f1e9 MR |
241 | } |
242 | ||
4a5fcab7 AL |
243 | /** |
244 | * Parsing rules | |
245 | */ | |
65c0f1e9 | 246 | static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) |
4a5fcab7 | 247 | { |
532fb532 HR |
248 | QObject *value; |
249 | QString *key = NULL; | |
9bada897 | 250 | JSONToken *peek, *token; |
4a5fcab7 | 251 | |
65c0f1e9 | 252 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
253 | if (peek == NULL) { |
254 | parse_error(ctxt, NULL, "premature EOI"); | |
255 | goto out; | |
256 | } | |
257 | ||
532fb532 HR |
258 | key = qobject_to(QString, parse_value(ctxt, ap)); |
259 | if (!key) { | |
4a5fcab7 AL |
260 | parse_error(ctxt, peek, "key is not a string in object"); |
261 | goto out; | |
262 | } | |
263 | ||
65c0f1e9 | 264 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
265 | if (token == NULL) { |
266 | parse_error(ctxt, NULL, "premature EOI"); | |
267 | goto out; | |
268 | } | |
269 | ||
9bada897 | 270 | if (token->type != JSON_COLON) { |
4a5fcab7 AL |
271 | parse_error(ctxt, token, "missing : in object pair"); |
272 | goto out; | |
273 | } | |
274 | ||
65c0f1e9 | 275 | value = parse_value(ctxt, ap); |
4a5fcab7 AL |
276 | if (value == NULL) { |
277 | parse_error(ctxt, token, "Missing value in dict"); | |
278 | goto out; | |
279 | } | |
280 | ||
532fb532 | 281 | qdict_put_obj(dict, qstring_get_str(key), value); |
4a5fcab7 | 282 | |
cb3e7f08 | 283 | qobject_unref(key); |
4a5fcab7 AL |
284 | |
285 | return 0; | |
286 | ||
287 | out: | |
cb3e7f08 | 288 | qobject_unref(key); |
4a5fcab7 AL |
289 | |
290 | return -1; | |
291 | } | |
292 | ||
65c0f1e9 | 293 | static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
294 | { |
295 | QDict *dict = NULL; | |
9bada897 | 296 | JSONToken *token, *peek; |
4a5fcab7 | 297 | |
65c0f1e9 | 298 | token = parser_context_pop_token(ctxt); |
9bada897 | 299 | assert(token && token->type == JSON_LCURLY); |
4a5fcab7 AL |
300 | |
301 | dict = qdict_new(); | |
302 | ||
65c0f1e9 | 303 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
304 | if (peek == NULL) { |
305 | parse_error(ctxt, NULL, "premature EOI"); | |
306 | goto out; | |
307 | } | |
308 | ||
9bada897 | 309 | if (peek->type != JSON_RCURLY) { |
65c0f1e9 | 310 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
311 | goto out; |
312 | } | |
313 | ||
65c0f1e9 | 314 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
315 | if (token == NULL) { |
316 | parse_error(ctxt, NULL, "premature EOI"); | |
317 | goto out; | |
318 | } | |
319 | ||
9bada897 PB |
320 | while (token->type != JSON_RCURLY) { |
321 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
322 | parse_error(ctxt, token, "expected separator in dict"); |
323 | goto out; | |
324 | } | |
4a5fcab7 | 325 | |
65c0f1e9 | 326 | if (parse_pair(ctxt, dict, ap) == -1) { |
4a5fcab7 AL |
327 | goto out; |
328 | } | |
329 | ||
65c0f1e9 | 330 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
331 | if (token == NULL) { |
332 | parse_error(ctxt, NULL, "premature EOI"); | |
333 | goto out; | |
334 | } | |
4a5fcab7 | 335 | } |
4a5fcab7 | 336 | } else { |
a491af47 | 337 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
338 | } |
339 | ||
4a5fcab7 AL |
340 | return QOBJECT(dict); |
341 | ||
342 | out: | |
cb3e7f08 | 343 | qobject_unref(dict); |
4a5fcab7 AL |
344 | return NULL; |
345 | } | |
346 | ||
65c0f1e9 | 347 | static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 AL |
348 | { |
349 | QList *list = NULL; | |
9bada897 | 350 | JSONToken *token, *peek; |
4a5fcab7 | 351 | |
65c0f1e9 | 352 | token = parser_context_pop_token(ctxt); |
9bada897 | 353 | assert(token && token->type == JSON_LSQUARE); |
4a5fcab7 AL |
354 | |
355 | list = qlist_new(); | |
356 | ||
65c0f1e9 | 357 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
358 | if (peek == NULL) { |
359 | parse_error(ctxt, NULL, "premature EOI"); | |
360 | goto out; | |
361 | } | |
362 | ||
9bada897 | 363 | if (peek->type != JSON_RSQUARE) { |
4a5fcab7 AL |
364 | QObject *obj; |
365 | ||
65c0f1e9 | 366 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
367 | if (obj == NULL) { |
368 | parse_error(ctxt, token, "expecting value"); | |
369 | goto out; | |
370 | } | |
371 | ||
372 | qlist_append_obj(list, obj); | |
373 | ||
65c0f1e9 | 374 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
375 | if (token == NULL) { |
376 | parse_error(ctxt, NULL, "premature EOI"); | |
377 | goto out; | |
378 | } | |
379 | ||
9bada897 PB |
380 | while (token->type != JSON_RSQUARE) { |
381 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
382 | parse_error(ctxt, token, "expected separator in list"); |
383 | goto out; | |
384 | } | |
385 | ||
65c0f1e9 | 386 | obj = parse_value(ctxt, ap); |
4a5fcab7 AL |
387 | if (obj == NULL) { |
388 | parse_error(ctxt, token, "expecting value"); | |
389 | goto out; | |
390 | } | |
391 | ||
392 | qlist_append_obj(list, obj); | |
393 | ||
65c0f1e9 | 394 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
395 | if (token == NULL) { |
396 | parse_error(ctxt, NULL, "premature EOI"); | |
397 | goto out; | |
398 | } | |
4a5fcab7 | 399 | } |
4a5fcab7 | 400 | } else { |
a491af47 | 401 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
402 | } |
403 | ||
4a5fcab7 AL |
404 | return QOBJECT(list); |
405 | ||
406 | out: | |
cb3e7f08 | 407 | qobject_unref(list); |
4a5fcab7 AL |
408 | return NULL; |
409 | } | |
410 | ||
65c0f1e9 | 411 | static QObject *parse_keyword(JSONParserContext *ctxt) |
4a5fcab7 | 412 | { |
9bada897 | 413 | JSONToken *token; |
4a5fcab7 | 414 | |
65c0f1e9 | 415 | token = parser_context_pop_token(ctxt); |
9bada897 | 416 | assert(token && token->type == JSON_KEYWORD); |
50e2a467 | 417 | |
9bada897 | 418 | if (!strcmp(token->str, "true")) { |
d538b255 | 419 | return QOBJECT(qbool_from_bool(true)); |
9bada897 | 420 | } else if (!strcmp(token->str, "false")) { |
d538b255 | 421 | return QOBJECT(qbool_from_bool(false)); |
9bada897 | 422 | } else if (!strcmp(token->str, "null")) { |
006ca09f | 423 | return QOBJECT(qnull()); |
4a5fcab7 | 424 | } |
9bada897 | 425 | parse_error(ctxt, token, "invalid keyword '%s'", token->str); |
4a5fcab7 AL |
426 | return NULL; |
427 | } | |
428 | ||
61030280 | 429 | static QObject *parse_interpolation(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 430 | { |
9bada897 | 431 | JSONToken *token; |
4a5fcab7 | 432 | |
65c0f1e9 | 433 | token = parser_context_pop_token(ctxt); |
61030280 | 434 | assert(token && token->type == JSON_INTERP); |
6b9606f6 | 435 | |
9bada897 | 436 | if (!strcmp(token->str, "%p")) { |
d538b255 | 437 | return va_arg(*ap, QObject *); |
9bada897 | 438 | } else if (!strcmp(token->str, "%i")) { |
d538b255 | 439 | return QOBJECT(qbool_from_bool(va_arg(*ap, int))); |
9bada897 | 440 | } else if (!strcmp(token->str, "%d")) { |
01b2ffce | 441 | return QOBJECT(qnum_from_int(va_arg(*ap, int))); |
9bada897 | 442 | } else if (!strcmp(token->str, "%ld")) { |
01b2ffce | 443 | return QOBJECT(qnum_from_int(va_arg(*ap, long))); |
53a0d616 | 444 | } else if (!strcmp(token->str, "%lld")) { |
01b2ffce | 445 | return QOBJECT(qnum_from_int(va_arg(*ap, long long))); |
53a0d616 MA |
446 | } else if (!strcmp(token->str, "%" PRId64)) { |
447 | return QOBJECT(qnum_from_int(va_arg(*ap, int64_t))); | |
2bc7cfea MAL |
448 | } else if (!strcmp(token->str, "%u")) { |
449 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned int))); | |
450 | } else if (!strcmp(token->str, "%lu")) { | |
451 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long))); | |
53a0d616 | 452 | } else if (!strcmp(token->str, "%llu")) { |
2bc7cfea | 453 | return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long long))); |
53a0d616 MA |
454 | } else if (!strcmp(token->str, "%" PRIu64)) { |
455 | return QOBJECT(qnum_from_uint(va_arg(*ap, uint64_t))); | |
9bada897 | 456 | } else if (!strcmp(token->str, "%s")) { |
d538b255 | 457 | return QOBJECT(qstring_from_str(va_arg(*ap, const char *))); |
9bada897 | 458 | } else if (!strcmp(token->str, "%f")) { |
01b2ffce | 459 | return QOBJECT(qnum_from_double(va_arg(*ap, double))); |
4a5fcab7 | 460 | } |
f7617d45 | 461 | parse_error(ctxt, token, "invalid interpolation '%s'", token->str); |
4a5fcab7 AL |
462 | return NULL; |
463 | } | |
464 | ||
65c0f1e9 | 465 | static QObject *parse_literal(JSONParserContext *ctxt) |
4a5fcab7 | 466 | { |
9bada897 | 467 | JSONToken *token; |
4a5fcab7 | 468 | |
65c0f1e9 | 469 | token = parser_context_pop_token(ctxt); |
d538b255 | 470 | assert(token); |
11e8a46c | 471 | |
9bada897 | 472 | switch (token->type) { |
4a5fcab7 | 473 | case JSON_STRING: |
b2da4a4d | 474 | return QOBJECT(parse_string(ctxt, token)); |
3d5b3ec6 | 475 | case JSON_INTEGER: { |
01b2ffce MAL |
476 | /* |
477 | * Represent JSON_INTEGER as QNUM_I64 if possible, else as | |
2bc7cfea MAL |
478 | * QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64() |
479 | * and qemu_strtou64() fail with ERANGE when it's not | |
480 | * possible. | |
3d5b3ec6 | 481 | * |
01b2ffce | 482 | * qnum_get_int() will then work for any signed 64-bit |
2bc7cfea MAL |
483 | * JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit |
484 | * integer, and qnum_get_double() both for any JSON_INTEGER | |
485 | * and any JSON_FLOAT (with precision loss for integers beyond | |
486 | * 53 bits) | |
3d5b3ec6 | 487 | */ |
2bc7cfea | 488 | int ret; |
3d5b3ec6 | 489 | int64_t value; |
2bc7cfea | 490 | uint64_t uvalue; |
3d5b3ec6 | 491 | |
2bc7cfea MAL |
492 | ret = qemu_strtoi64(token->str, NULL, 10, &value); |
493 | if (!ret) { | |
01b2ffce | 494 | return QOBJECT(qnum_from_int(value)); |
3d5b3ec6 | 495 | } |
2bc7cfea MAL |
496 | assert(ret == -ERANGE); |
497 | ||
498 | if (token->str[0] != '-') { | |
499 | ret = qemu_strtou64(token->str, NULL, 10, &uvalue); | |
500 | if (!ret) { | |
501 | return QOBJECT(qnum_from_uint(uvalue)); | |
502 | } | |
503 | assert(ret == -ERANGE); | |
504 | } | |
3d5b3ec6 MR |
505 | /* fall through to JSON_FLOAT */ |
506 | } | |
4a5fcab7 | 507 | case JSON_FLOAT: |
6e8e5cb9 EB |
508 | /* FIXME dependent on locale; a pervasive issue in QEMU */ |
509 | /* FIXME our lexer matches RFC 7159 in forbidding Inf or NaN, | |
510 | * but those might be useful extensions beyond JSON */ | |
01b2ffce | 511 | return QOBJECT(qnum_from_double(strtod(token->str, NULL))); |
4a5fcab7 | 512 | default: |
d538b255 | 513 | abort(); |
4a5fcab7 | 514 | } |
4a5fcab7 AL |
515 | } |
516 | ||
65c0f1e9 | 517 | static QObject *parse_value(JSONParserContext *ctxt, va_list *ap) |
4a5fcab7 | 518 | { |
9bada897 | 519 | JSONToken *token; |
4a5fcab7 | 520 | |
d538b255 MA |
521 | token = parser_context_peek_token(ctxt); |
522 | if (token == NULL) { | |
523 | parse_error(ctxt, NULL, "premature EOI"); | |
524 | return NULL; | |
4a5fcab7 AL |
525 | } |
526 | ||
9bada897 | 527 | switch (token->type) { |
d538b255 MA |
528 | case JSON_LCURLY: |
529 | return parse_object(ctxt, ap); | |
530 | case JSON_LSQUARE: | |
531 | return parse_array(ctxt, ap); | |
61030280 MA |
532 | case JSON_INTERP: |
533 | return parse_interpolation(ctxt, ap); | |
d538b255 MA |
534 | case JSON_INTEGER: |
535 | case JSON_FLOAT: | |
536 | case JSON_STRING: | |
537 | return parse_literal(ctxt); | |
538 | case JSON_KEYWORD: | |
539 | return parse_keyword(ctxt); | |
540 | default: | |
541 | parse_error(ctxt, token, "expecting value"); | |
542 | return NULL; | |
543 | } | |
4a5fcab7 AL |
544 | } |
545 | ||
abe7c206 MA |
546 | JSONToken *json_token(JSONTokenType type, int x, int y, GString *tokstr) |
547 | { | |
548 | JSONToken *token = g_malloc(sizeof(JSONToken) + tokstr->len + 1); | |
549 | ||
550 | token->type = type; | |
551 | memcpy(token->str, tokstr->str, tokstr->len); | |
552 | token->str[tokstr->len] = 0; | |
553 | token->x = x; | |
554 | token->y = y; | |
555 | return token; | |
556 | } | |
557 | ||
62815d85 | 558 | QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp) |
4a5fcab7 | 559 | { |
e8b19d7d | 560 | JSONParserContext ctxt = { .buf = tokens }; |
4a5fcab7 AL |
561 | QObject *result; |
562 | ||
e8b19d7d | 563 | result = parse_value(&ctxt, ap); |
5d50113c | 564 | assert(ctxt.err || g_queue_is_empty(ctxt.buf)); |
65c0f1e9 | 565 | |
e8b19d7d | 566 | error_propagate(errp, ctxt.err); |
4a5fcab7 | 567 | |
e8b19d7d MAL |
568 | while (!g_queue_is_empty(ctxt.buf)) { |
569 | parser_context_pop_token(&ctxt); | |
570 | } | |
571 | g_free(ctxt.current); | |
ef749d07 | 572 | |
4a5fcab7 AL |
573 | return result; |
574 | } |