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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" |
856dfd8a | 15 | #include "qemu/ctype.h" |
2bc7cfea | 16 | #include "qemu/cutils.h" |
e59f39d4 | 17 | #include "qemu/unicode.h" |
da34e65c | 18 | #include "qapi/error.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 | ||
5086c997 | 34 | typedef struct JSONParserContext { |
ef749d07 | 35 | Error *err; |
9bada897 | 36 | JSONToken *current; |
95385fe9 | 37 | GQueue *buf; |
ada74c3b | 38 | va_list *ap; |
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 | ||
ada74c3b | 52 | static QObject *parse_value(JSONParserContext *ctxt); |
4a5fcab7 | 53 | |
4a5fcab7 AL |
54 | /** |
55 | * Error handler | |
56 | */ | |
9edc6313 | 57 | static void G_GNUC_PRINTF(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; |
68af4cc1 | 132 | GString *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++; | |
68af4cc1 | 142 | str = g_string_new(NULL); |
00ea57fa MA |
143 | |
144 | while (*ptr != quote) { | |
145 | assert(*ptr); | |
16a48599 MA |
146 | switch (*ptr) { |
147 | case '\\': | |
dc45a07c | 148 | beg = ptr++; |
00ea57fa | 149 | switch (*ptr++) { |
4a5fcab7 | 150 | case '"': |
68af4cc1 | 151 | g_string_append_c(str, '"'); |
4a5fcab7 AL |
152 | break; |
153 | case '\'': | |
68af4cc1 | 154 | g_string_append_c(str, '\''); |
4a5fcab7 AL |
155 | break; |
156 | case '\\': | |
68af4cc1 | 157 | g_string_append_c(str, '\\'); |
4a5fcab7 AL |
158 | break; |
159 | case '/': | |
68af4cc1 | 160 | g_string_append_c(str, '/'); |
4a5fcab7 AL |
161 | break; |
162 | case 'b': | |
68af4cc1 | 163 | g_string_append_c(str, '\b'); |
4a5fcab7 | 164 | break; |
bd032695 | 165 | case 'f': |
68af4cc1 | 166 | g_string_append_c(str, '\f'); |
bd032695 | 167 | break; |
4a5fcab7 | 168 | case 'n': |
68af4cc1 | 169 | g_string_append_c(str, '\n'); |
4a5fcab7 AL |
170 | break; |
171 | case 'r': | |
68af4cc1 | 172 | g_string_append_c(str, '\r'); |
4a5fcab7 AL |
173 | break; |
174 | case 't': | |
68af4cc1 | 175 | g_string_append_c(str, '\t'); |
4a5fcab7 | 176 | break; |
de6decfe | 177 | case 'u': |
dc45a07c MA |
178 | cp = cvt4hex(ptr); |
179 | ptr += 4; | |
180 | ||
181 | /* handle surrogate pairs */ | |
182 | if (cp >= 0xD800 && cp <= 0xDBFF | |
183 | && ptr[0] == '\\' && ptr[1] == 'u') { | |
184 | /* leading surrogate followed by \u */ | |
185 | cp = 0x10000 + ((cp & 0x3FF) << 10); | |
186 | trailing = cvt4hex(ptr + 2); | |
187 | if (trailing >= 0xDC00 && trailing <= 0xDFFF) { | |
188 | /* followed by trailing surrogate */ | |
189 | cp |= trailing & 0x3FF; | |
190 | ptr += 6; | |
191 | } else { | |
192 | cp = -1; /* invalid */ | |
4a5fcab7 | 193 | } |
4a5fcab7 AL |
194 | } |
195 | ||
46a628b1 MA |
196 | if (mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp) < 0) { |
197 | parse_error(ctxt, token, | |
dc45a07c MA |
198 | "%.*s is not a valid Unicode character", |
199 | (int)(ptr - beg), beg); | |
46a628b1 MA |
200 | goto out; |
201 | } | |
68af4cc1 | 202 | g_string_append(str, utf8_buf); |
de6decfe | 203 | break; |
4a5fcab7 AL |
204 | default: |
205 | parse_error(ctxt, token, "invalid escape sequence in string"); | |
206 | goto out; | |
207 | } | |
16a48599 MA |
208 | break; |
209 | case '%': | |
bbc0586c CF |
210 | if (ctxt->ap) { |
211 | if (ptr[1] != '%') { | |
212 | parse_error(ctxt, token, "can't interpolate into string"); | |
213 | goto out; | |
214 | } | |
215 | ptr++; | |
16a48599 MA |
216 | } |
217 | /* fall through */ | |
218 | default: | |
e59f39d4 | 219 | cp = mod_utf8_codepoint(ptr, 6, &end); |
4b1c0cd7 | 220 | if (cp < 0) { |
e59f39d4 MA |
221 | parse_error(ctxt, token, "invalid UTF-8 sequence in string"); |
222 | goto out; | |
223 | } | |
224 | ptr = end; | |
225 | len = mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp); | |
226 | assert(len >= 0); | |
68af4cc1 | 227 | g_string_append(str, utf8_buf); |
4a5fcab7 AL |
228 | } |
229 | } | |
230 | ||
68af4cc1 | 231 | return qstring_from_gstring(str); |
4a5fcab7 AL |
232 | |
233 | out: | |
68af4cc1 | 234 | g_string_free(str, true); |
4a5fcab7 AL |
235 | return NULL; |
236 | } | |
237 | ||
9bada897 PB |
238 | /* Note: the token object returned by parser_context_peek_token or |
239 | * parser_context_pop_token is deleted as soon as parser_context_pop_token | |
240 | * is called again. | |
95385fe9 | 241 | */ |
9bada897 | 242 | static JSONToken *parser_context_pop_token(JSONParserContext *ctxt) |
65c0f1e9 | 243 | { |
9bada897 | 244 | g_free(ctxt->current); |
95385fe9 PB |
245 | ctxt->current = g_queue_pop_head(ctxt->buf); |
246 | return ctxt->current; | |
65c0f1e9 MR |
247 | } |
248 | ||
9bada897 | 249 | static JSONToken *parser_context_peek_token(JSONParserContext *ctxt) |
65c0f1e9 | 250 | { |
95385fe9 | 251 | return g_queue_peek_head(ctxt->buf); |
65c0f1e9 MR |
252 | } |
253 | ||
4a5fcab7 AL |
254 | /** |
255 | * Parsing rules | |
256 | */ | |
ada74c3b | 257 | static int parse_pair(JSONParserContext *ctxt, QDict *dict) |
4a5fcab7 | 258 | { |
922d42bb AC |
259 | QObject *key_obj = NULL; |
260 | QString *key; | |
532fb532 | 261 | QObject *value; |
9bada897 | 262 | JSONToken *peek, *token; |
4a5fcab7 | 263 | |
65c0f1e9 | 264 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
265 | if (peek == NULL) { |
266 | parse_error(ctxt, NULL, "premature EOI"); | |
267 | goto out; | |
268 | } | |
269 | ||
922d42bb AC |
270 | key_obj = parse_value(ctxt); |
271 | key = qobject_to(QString, key_obj); | |
532fb532 | 272 | if (!key) { |
4a5fcab7 AL |
273 | parse_error(ctxt, peek, "key is not a string in object"); |
274 | goto out; | |
275 | } | |
276 | ||
65c0f1e9 | 277 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
278 | if (token == NULL) { |
279 | parse_error(ctxt, NULL, "premature EOI"); | |
280 | goto out; | |
281 | } | |
282 | ||
9bada897 | 283 | if (token->type != JSON_COLON) { |
4a5fcab7 AL |
284 | parse_error(ctxt, token, "missing : in object pair"); |
285 | goto out; | |
286 | } | |
287 | ||
ada74c3b | 288 | value = parse_value(ctxt); |
4a5fcab7 AL |
289 | if (value == NULL) { |
290 | parse_error(ctxt, token, "Missing value in dict"); | |
291 | goto out; | |
292 | } | |
00382fa8 MA |
293 | |
294 | if (qdict_haskey(dict, qstring_get_str(key))) { | |
295 | parse_error(ctxt, token, "duplicate key"); | |
296 | goto out; | |
297 | } | |
4a5fcab7 | 298 | |
532fb532 | 299 | qdict_put_obj(dict, qstring_get_str(key), value); |
4a5fcab7 | 300 | |
922d42bb | 301 | qobject_unref(key_obj); |
4a5fcab7 AL |
302 | return 0; |
303 | ||
304 | out: | |
922d42bb | 305 | qobject_unref(key_obj); |
4a5fcab7 AL |
306 | return -1; |
307 | } | |
308 | ||
ada74c3b | 309 | static QObject *parse_object(JSONParserContext *ctxt) |
4a5fcab7 AL |
310 | { |
311 | QDict *dict = NULL; | |
9bada897 | 312 | JSONToken *token, *peek; |
4a5fcab7 | 313 | |
65c0f1e9 | 314 | token = parser_context_pop_token(ctxt); |
9bada897 | 315 | assert(token && token->type == JSON_LCURLY); |
4a5fcab7 AL |
316 | |
317 | dict = qdict_new(); | |
318 | ||
65c0f1e9 | 319 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
320 | if (peek == NULL) { |
321 | parse_error(ctxt, NULL, "premature EOI"); | |
322 | goto out; | |
323 | } | |
324 | ||
9bada897 | 325 | if (peek->type != JSON_RCURLY) { |
ada74c3b | 326 | if (parse_pair(ctxt, dict) == -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 | } | |
335 | ||
9bada897 PB |
336 | while (token->type != JSON_RCURLY) { |
337 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
338 | parse_error(ctxt, token, "expected separator in dict"); |
339 | goto out; | |
340 | } | |
4a5fcab7 | 341 | |
ada74c3b | 342 | if (parse_pair(ctxt, dict) == -1) { |
4a5fcab7 AL |
343 | goto out; |
344 | } | |
345 | ||
65c0f1e9 | 346 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
347 | if (token == NULL) { |
348 | parse_error(ctxt, NULL, "premature EOI"); | |
349 | goto out; | |
350 | } | |
4a5fcab7 | 351 | } |
4a5fcab7 | 352 | } else { |
a491af47 | 353 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
354 | } |
355 | ||
4a5fcab7 AL |
356 | return QOBJECT(dict); |
357 | ||
358 | out: | |
cb3e7f08 | 359 | qobject_unref(dict); |
4a5fcab7 AL |
360 | return NULL; |
361 | } | |
362 | ||
ada74c3b | 363 | static QObject *parse_array(JSONParserContext *ctxt) |
4a5fcab7 AL |
364 | { |
365 | QList *list = NULL; | |
9bada897 | 366 | JSONToken *token, *peek; |
4a5fcab7 | 367 | |
65c0f1e9 | 368 | token = parser_context_pop_token(ctxt); |
9bada897 | 369 | assert(token && token->type == JSON_LSQUARE); |
4a5fcab7 AL |
370 | |
371 | list = qlist_new(); | |
372 | ||
65c0f1e9 | 373 | peek = parser_context_peek_token(ctxt); |
11e8a46c AL |
374 | if (peek == NULL) { |
375 | parse_error(ctxt, NULL, "premature EOI"); | |
376 | goto out; | |
377 | } | |
378 | ||
9bada897 | 379 | if (peek->type != JSON_RSQUARE) { |
4a5fcab7 AL |
380 | QObject *obj; |
381 | ||
ada74c3b | 382 | obj = parse_value(ctxt); |
4a5fcab7 AL |
383 | if (obj == NULL) { |
384 | parse_error(ctxt, token, "expecting value"); | |
385 | goto out; | |
386 | } | |
387 | ||
388 | qlist_append_obj(list, obj); | |
389 | ||
65c0f1e9 | 390 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
391 | if (token == NULL) { |
392 | parse_error(ctxt, NULL, "premature EOI"); | |
393 | goto out; | |
394 | } | |
395 | ||
9bada897 PB |
396 | while (token->type != JSON_RSQUARE) { |
397 | if (token->type != JSON_COMMA) { | |
4a5fcab7 AL |
398 | parse_error(ctxt, token, "expected separator in list"); |
399 | goto out; | |
400 | } | |
401 | ||
ada74c3b | 402 | obj = parse_value(ctxt); |
4a5fcab7 AL |
403 | if (obj == NULL) { |
404 | parse_error(ctxt, token, "expecting value"); | |
405 | goto out; | |
406 | } | |
407 | ||
408 | qlist_append_obj(list, obj); | |
409 | ||
65c0f1e9 | 410 | token = parser_context_pop_token(ctxt); |
11e8a46c AL |
411 | if (token == NULL) { |
412 | parse_error(ctxt, NULL, "premature EOI"); | |
413 | goto out; | |
414 | } | |
4a5fcab7 | 415 | } |
4a5fcab7 | 416 | } else { |
a491af47 | 417 | (void)parser_context_pop_token(ctxt); |
4a5fcab7 AL |
418 | } |
419 | ||
4a5fcab7 AL |
420 | return QOBJECT(list); |
421 | ||
422 | out: | |
cb3e7f08 | 423 | qobject_unref(list); |
4a5fcab7 AL |
424 | return NULL; |
425 | } | |
426 | ||
65c0f1e9 | 427 | static QObject *parse_keyword(JSONParserContext *ctxt) |
4a5fcab7 | 428 | { |
9bada897 | 429 | JSONToken *token; |
4a5fcab7 | 430 | |
65c0f1e9 | 431 | token = parser_context_pop_token(ctxt); |
9bada897 | 432 | assert(token && token->type == JSON_KEYWORD); |
50e2a467 | 433 | |
9bada897 | 434 | if (!strcmp(token->str, "true")) { |
d538b255 | 435 | return QOBJECT(qbool_from_bool(true)); |
9bada897 | 436 | } else if (!strcmp(token->str, "false")) { |
d538b255 | 437 | return QOBJECT(qbool_from_bool(false)); |
9bada897 | 438 | } else if (!strcmp(token->str, "null")) { |
006ca09f | 439 | return QOBJECT(qnull()); |
4a5fcab7 | 440 | } |
9bada897 | 441 | parse_error(ctxt, token, "invalid keyword '%s'", token->str); |
4a5fcab7 AL |
442 | return NULL; |
443 | } | |
444 | ||
ada74c3b | 445 | static QObject *parse_interpolation(JSONParserContext *ctxt) |
4a5fcab7 | 446 | { |
9bada897 | 447 | JSONToken *token; |
4a5fcab7 | 448 | |
65c0f1e9 | 449 | token = parser_context_pop_token(ctxt); |
61030280 | 450 | assert(token && token->type == JSON_INTERP); |
6b9606f6 | 451 | |
9bada897 | 452 | if (!strcmp(token->str, "%p")) { |
ada74c3b | 453 | return va_arg(*ctxt->ap, QObject *); |
9bada897 | 454 | } else if (!strcmp(token->str, "%i")) { |
ada74c3b | 455 | return QOBJECT(qbool_from_bool(va_arg(*ctxt->ap, int))); |
9bada897 | 456 | } else if (!strcmp(token->str, "%d")) { |
ada74c3b | 457 | return QOBJECT(qnum_from_int(va_arg(*ctxt->ap, int))); |
9bada897 | 458 | } else if (!strcmp(token->str, "%ld")) { |
ada74c3b | 459 | return QOBJECT(qnum_from_int(va_arg(*ctxt->ap, long))); |
53a0d616 | 460 | } else if (!strcmp(token->str, "%lld")) { |
ada74c3b | 461 | return QOBJECT(qnum_from_int(va_arg(*ctxt->ap, long long))); |
53a0d616 | 462 | } else if (!strcmp(token->str, "%" PRId64)) { |
ada74c3b | 463 | return QOBJECT(qnum_from_int(va_arg(*ctxt->ap, int64_t))); |
2bc7cfea | 464 | } else if (!strcmp(token->str, "%u")) { |
ada74c3b | 465 | return QOBJECT(qnum_from_uint(va_arg(*ctxt->ap, unsigned int))); |
2bc7cfea | 466 | } else if (!strcmp(token->str, "%lu")) { |
ada74c3b | 467 | return QOBJECT(qnum_from_uint(va_arg(*ctxt->ap, unsigned long))); |
53a0d616 | 468 | } else if (!strcmp(token->str, "%llu")) { |
ada74c3b | 469 | return QOBJECT(qnum_from_uint(va_arg(*ctxt->ap, unsigned long long))); |
53a0d616 | 470 | } else if (!strcmp(token->str, "%" PRIu64)) { |
ada74c3b | 471 | return QOBJECT(qnum_from_uint(va_arg(*ctxt->ap, uint64_t))); |
9bada897 | 472 | } else if (!strcmp(token->str, "%s")) { |
ada74c3b | 473 | return QOBJECT(qstring_from_str(va_arg(*ctxt->ap, const char *))); |
9bada897 | 474 | } else if (!strcmp(token->str, "%f")) { |
ada74c3b | 475 | return QOBJECT(qnum_from_double(va_arg(*ctxt->ap, double))); |
4a5fcab7 | 476 | } |
f7617d45 | 477 | parse_error(ctxt, token, "invalid interpolation '%s'", token->str); |
4a5fcab7 AL |
478 | return NULL; |
479 | } | |
480 | ||
65c0f1e9 | 481 | static QObject *parse_literal(JSONParserContext *ctxt) |
4a5fcab7 | 482 | { |
9bada897 | 483 | JSONToken *token; |
4a5fcab7 | 484 | |
65c0f1e9 | 485 | token = parser_context_pop_token(ctxt); |
d538b255 | 486 | assert(token); |
11e8a46c | 487 | |
9bada897 | 488 | switch (token->type) { |
4a5fcab7 | 489 | case JSON_STRING: |
b2da4a4d | 490 | return QOBJECT(parse_string(ctxt, token)); |
3d5b3ec6 | 491 | case JSON_INTEGER: { |
01b2ffce MAL |
492 | /* |
493 | * Represent JSON_INTEGER as QNUM_I64 if possible, else as | |
2bc7cfea MAL |
494 | * QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64() |
495 | * and qemu_strtou64() fail with ERANGE when it's not | |
496 | * possible. | |
3d5b3ec6 | 497 | * |
01b2ffce | 498 | * qnum_get_int() will then work for any signed 64-bit |
2bc7cfea MAL |
499 | * JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit |
500 | * integer, and qnum_get_double() both for any JSON_INTEGER | |
501 | * and any JSON_FLOAT (with precision loss for integers beyond | |
502 | * 53 bits) | |
3d5b3ec6 | 503 | */ |
2bc7cfea | 504 | int ret; |
3d5b3ec6 | 505 | int64_t value; |
2bc7cfea | 506 | uint64_t uvalue; |
3d5b3ec6 | 507 | |
2bc7cfea MAL |
508 | ret = qemu_strtoi64(token->str, NULL, 10, &value); |
509 | if (!ret) { | |
01b2ffce | 510 | return QOBJECT(qnum_from_int(value)); |
3d5b3ec6 | 511 | } |
2bc7cfea MAL |
512 | assert(ret == -ERANGE); |
513 | ||
514 | if (token->str[0] != '-') { | |
515 | ret = qemu_strtou64(token->str, NULL, 10, &uvalue); | |
516 | if (!ret) { | |
517 | return QOBJECT(qnum_from_uint(uvalue)); | |
518 | } | |
519 | assert(ret == -ERANGE); | |
520 | } | |
3d5b3ec6 | 521 | } |
6f0dd6c5 | 522 | /* fall through to JSON_FLOAT */ |
4a5fcab7 | 523 | case JSON_FLOAT: |
6e8e5cb9 | 524 | /* FIXME dependent on locale; a pervasive issue in QEMU */ |
37aded92 | 525 | /* FIXME our lexer matches RFC 8259 in forbidding Inf or NaN, |
6e8e5cb9 | 526 | * but those might be useful extensions beyond JSON */ |
01b2ffce | 527 | return QOBJECT(qnum_from_double(strtod(token->str, NULL))); |
4a5fcab7 | 528 | default: |
d538b255 | 529 | abort(); |
4a5fcab7 | 530 | } |
4a5fcab7 AL |
531 | } |
532 | ||
ada74c3b | 533 | static QObject *parse_value(JSONParserContext *ctxt) |
4a5fcab7 | 534 | { |
9bada897 | 535 | JSONToken *token; |
4a5fcab7 | 536 | |
d538b255 MA |
537 | token = parser_context_peek_token(ctxt); |
538 | if (token == NULL) { | |
539 | parse_error(ctxt, NULL, "premature EOI"); | |
540 | return NULL; | |
4a5fcab7 AL |
541 | } |
542 | ||
9bada897 | 543 | switch (token->type) { |
d538b255 | 544 | case JSON_LCURLY: |
ada74c3b | 545 | return parse_object(ctxt); |
d538b255 | 546 | case JSON_LSQUARE: |
ada74c3b | 547 | return parse_array(ctxt); |
61030280 | 548 | case JSON_INTERP: |
ada74c3b | 549 | return parse_interpolation(ctxt); |
d538b255 MA |
550 | case JSON_INTEGER: |
551 | case JSON_FLOAT: | |
552 | case JSON_STRING: | |
553 | return parse_literal(ctxt); | |
554 | case JSON_KEYWORD: | |
555 | return parse_keyword(ctxt); | |
556 | default: | |
557 | parse_error(ctxt, token, "expecting value"); | |
558 | return NULL; | |
559 | } | |
4a5fcab7 AL |
560 | } |
561 | ||
abe7c206 MA |
562 | JSONToken *json_token(JSONTokenType type, int x, int y, GString *tokstr) |
563 | { | |
564 | JSONToken *token = g_malloc(sizeof(JSONToken) + tokstr->len + 1); | |
565 | ||
566 | token->type = type; | |
567 | memcpy(token->str, tokstr->str, tokstr->len); | |
568 | token->str[tokstr->len] = 0; | |
569 | token->x = x; | |
570 | token->y = y; | |
571 | return token; | |
572 | } | |
573 | ||
62815d85 | 574 | QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp) |
4a5fcab7 | 575 | { |
ada74c3b | 576 | JSONParserContext ctxt = { .buf = tokens, .ap = ap }; |
4a5fcab7 AL |
577 | QObject *result; |
578 | ||
ada74c3b | 579 | result = parse_value(&ctxt); |
5d50113c | 580 | assert(ctxt.err || g_queue_is_empty(ctxt.buf)); |
65c0f1e9 | 581 | |
e8b19d7d | 582 | error_propagate(errp, ctxt.err); |
4a5fcab7 | 583 | |
e8b19d7d MAL |
584 | while (!g_queue_is_empty(ctxt.buf)) { |
585 | parser_context_pop_token(&ctxt); | |
586 | } | |
587 | g_free(ctxt.current); | |
ef749d07 | 588 | |
4a5fcab7 AL |
589 | return result; |
590 | } |