1 | /* vim: set et ts=3 sw=3 sts=3 ft=c: |
---|
2 | * |
---|
3 | * Copyright (C) 2012, 2013, 2014 James McLaughlin et al. All rights reserved. |
---|
4 | * https://github.com/udp/json-parser |
---|
5 | * |
---|
6 | * Redistribution and use in source and binary forms, with or without |
---|
7 | * modification, are permitted provided that the following conditions |
---|
8 | * are met: |
---|
9 | * |
---|
10 | * 1. Redistributions of source code must retain the above copyright |
---|
11 | * notice, this list of conditions and the following disclaimer. |
---|
12 | * |
---|
13 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
14 | * notice, this list of conditions and the following disclaimer in the |
---|
15 | * documentation and/or other materials provided with the distribution. |
---|
16 | * |
---|
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
27 | * SUCH DAMAGE. |
---|
28 | */ |
---|
29 | |
---|
30 | #include <glib.h> |
---|
31 | |
---|
32 | #include "json.h" |
---|
33 | |
---|
34 | #ifdef _MSC_VER |
---|
35 | #ifndef _CRT_SECURE_NO_WARNINGS |
---|
36 | #define _CRT_SECURE_NO_WARNINGS |
---|
37 | #endif |
---|
38 | #endif |
---|
39 | |
---|
40 | #ifdef __cplusplus |
---|
41 | const struct _json_value json_value_none; /* zero-d by ctor */ |
---|
42 | #else |
---|
43 | const struct _json_value json_value_none = { 0 }; |
---|
44 | #endif |
---|
45 | |
---|
46 | #include <stdio.h> |
---|
47 | #include <string.h> |
---|
48 | #include <ctype.h> |
---|
49 | #include <math.h> |
---|
50 | |
---|
51 | typedef unsigned short json_uchar; |
---|
52 | |
---|
53 | static unsigned char hex_value (json_char c) |
---|
54 | { |
---|
55 | if (isdigit(c)) |
---|
56 | return c - '0'; |
---|
57 | |
---|
58 | switch (c) { |
---|
59 | case 'a': case 'A': return 0x0A; |
---|
60 | case 'b': case 'B': return 0x0B; |
---|
61 | case 'c': case 'C': return 0x0C; |
---|
62 | case 'd': case 'D': return 0x0D; |
---|
63 | case 'e': case 'E': return 0x0E; |
---|
64 | case 'f': case 'F': return 0x0F; |
---|
65 | default: return 0xFF; |
---|
66 | } |
---|
67 | } |
---|
68 | |
---|
69 | typedef struct |
---|
70 | { |
---|
71 | unsigned long used_memory; |
---|
72 | |
---|
73 | unsigned int uint_max; |
---|
74 | unsigned long ulong_max; |
---|
75 | |
---|
76 | json_settings settings; |
---|
77 | int first_pass; |
---|
78 | |
---|
79 | } json_state; |
---|
80 | |
---|
81 | static void * default_alloc (size_t size, int zero, void * user_data) |
---|
82 | { |
---|
83 | return zero ? calloc (1, size) : malloc (size); |
---|
84 | } |
---|
85 | |
---|
86 | static void default_free (void * ptr, void * user_data) |
---|
87 | { |
---|
88 | free (ptr); |
---|
89 | } |
---|
90 | |
---|
91 | static void * json_alloc (json_state * state, unsigned long size, int zero) |
---|
92 | { |
---|
93 | if ((state->ulong_max - state->used_memory) < size) |
---|
94 | return 0; |
---|
95 | |
---|
96 | if (state->settings.max_memory |
---|
97 | && (state->used_memory += size) > state->settings.max_memory) |
---|
98 | { |
---|
99 | return 0; |
---|
100 | } |
---|
101 | |
---|
102 | return state->settings.mem_alloc (size, zero, state->settings.user_data); |
---|
103 | } |
---|
104 | |
---|
105 | static int new_value |
---|
106 | (json_state * state, json_value ** top, json_value ** root, json_value ** alloc, json_type type) |
---|
107 | { |
---|
108 | json_value * value; |
---|
109 | int values_size; |
---|
110 | |
---|
111 | if (!state->first_pass) |
---|
112 | { |
---|
113 | value = *top = *alloc; |
---|
114 | *alloc = (*alloc)->_reserved.next_alloc; |
---|
115 | |
---|
116 | if (!*root) |
---|
117 | *root = value; |
---|
118 | |
---|
119 | switch (value->type) |
---|
120 | { |
---|
121 | case json_array: |
---|
122 | |
---|
123 | if (! (value->u.array.values = (json_value **) json_alloc |
---|
124 | (state, value->u.array.length * sizeof (json_value *), 0)) ) |
---|
125 | { |
---|
126 | return 0; |
---|
127 | } |
---|
128 | |
---|
129 | value->u.array.length = 0; |
---|
130 | break; |
---|
131 | |
---|
132 | case json_object: |
---|
133 | |
---|
134 | values_size = sizeof (*value->u.object.values) * value->u.object.length; |
---|
135 | |
---|
136 | if (! ((*(void **) &value->u.object.values) = json_alloc |
---|
137 | (state, values_size + ((unsigned long) value->u.object.values), 0)) ) |
---|
138 | { |
---|
139 | return 0; |
---|
140 | } |
---|
141 | |
---|
142 | value->_reserved.object_mem = (*(char **) &value->u.object.values) + values_size; |
---|
143 | |
---|
144 | value->u.object.length = 0; |
---|
145 | break; |
---|
146 | |
---|
147 | case json_string: |
---|
148 | |
---|
149 | if (! (value->u.string.ptr = (json_char *) json_alloc |
---|
150 | (state, (value->u.string.length + 1) * sizeof (json_char), 0)) ) |
---|
151 | { |
---|
152 | return 0; |
---|
153 | } |
---|
154 | |
---|
155 | value->u.string.length = 0; |
---|
156 | break; |
---|
157 | |
---|
158 | default: |
---|
159 | break; |
---|
160 | }; |
---|
161 | |
---|
162 | return 1; |
---|
163 | } |
---|
164 | |
---|
165 | value = (json_value *) json_alloc (state, sizeof (json_value), 1); |
---|
166 | |
---|
167 | if (!value) |
---|
168 | return 0; |
---|
169 | |
---|
170 | if (!*root) |
---|
171 | *root = value; |
---|
172 | |
---|
173 | value->type = type; |
---|
174 | value->parent = *top; |
---|
175 | |
---|
176 | if (*alloc) |
---|
177 | (*alloc)->_reserved.next_alloc = value; |
---|
178 | |
---|
179 | *alloc = *top = value; |
---|
180 | |
---|
181 | return 1; |
---|
182 | } |
---|
183 | |
---|
184 | #define e_off \ |
---|
185 | ((int) (i - cur_line_begin)) |
---|
186 | |
---|
187 | #define whitespace \ |
---|
188 | case '\n': ++ cur_line; cur_line_begin = i; \ |
---|
189 | case ' ': case '\t': case '\r' |
---|
190 | |
---|
191 | #define string_add(b) \ |
---|
192 | do { if (!state.first_pass) string [string_length] = b; ++ string_length; } while (0); |
---|
193 | |
---|
194 | static const long |
---|
195 | flag_next = 1 << 0, |
---|
196 | flag_reproc = 1 << 1, |
---|
197 | flag_need_comma = 1 << 2, |
---|
198 | flag_seek_value = 1 << 3, |
---|
199 | flag_escaped = 1 << 4, |
---|
200 | flag_string = 1 << 5, |
---|
201 | flag_need_colon = 1 << 6, |
---|
202 | flag_done = 1 << 7, |
---|
203 | flag_num_negative = 1 << 8, |
---|
204 | flag_num_zero = 1 << 9, |
---|
205 | flag_num_e = 1 << 10, |
---|
206 | flag_num_e_got_sign = 1 << 11, |
---|
207 | flag_num_e_negative = 1 << 12, |
---|
208 | flag_line_comment = 1 << 13, |
---|
209 | flag_block_comment = 1 << 14; |
---|
210 | |
---|
211 | json_value * json_parse_ex (json_settings * settings, |
---|
212 | const json_char * json, |
---|
213 | size_t length, |
---|
214 | char * error_buf) |
---|
215 | { |
---|
216 | json_char error [json_error_max]; |
---|
217 | unsigned int cur_line; |
---|
218 | const json_char * cur_line_begin, * i, * end; |
---|
219 | json_value * top, * root, * alloc = 0; |
---|
220 | json_state state = { 0 }; |
---|
221 | long flags; |
---|
222 | long num_digits = 0, num_e = 0; |
---|
223 | json_int_t num_fraction = 0; |
---|
224 | |
---|
225 | /* Skip UTF-8 BOM |
---|
226 | */ |
---|
227 | if (length >= 3 && ((unsigned char) json [0]) == 0xEF |
---|
228 | && ((unsigned char) json [1]) == 0xBB |
---|
229 | && ((unsigned char) json [2]) == 0xBF) |
---|
230 | { |
---|
231 | json += 3; |
---|
232 | length -= 3; |
---|
233 | } |
---|
234 | |
---|
235 | error[0] = '\0'; |
---|
236 | end = (json + length); |
---|
237 | |
---|
238 | memcpy (&state.settings, settings, sizeof (json_settings)); |
---|
239 | |
---|
240 | if (!state.settings.mem_alloc) |
---|
241 | state.settings.mem_alloc = default_alloc; |
---|
242 | |
---|
243 | if (!state.settings.mem_free) |
---|
244 | state.settings.mem_free = default_free; |
---|
245 | |
---|
246 | memset (&state.uint_max, 0xFF, sizeof (state.uint_max)); |
---|
247 | memset (&state.ulong_max, 0xFF, sizeof (state.ulong_max)); |
---|
248 | |
---|
249 | state.uint_max -= 8; /* limit of how much can be added before next check */ |
---|
250 | state.ulong_max -= 8; |
---|
251 | |
---|
252 | for (state.first_pass = 1; state.first_pass >= 0; -- state.first_pass) |
---|
253 | { |
---|
254 | json_uchar uchar; |
---|
255 | unsigned char uc_b1, uc_b2, uc_b3, uc_b4; |
---|
256 | json_char * string = 0; |
---|
257 | unsigned int string_length = 0; |
---|
258 | |
---|
259 | top = root = 0; |
---|
260 | flags = flag_seek_value; |
---|
261 | |
---|
262 | cur_line = 1; |
---|
263 | cur_line_begin = json; |
---|
264 | |
---|
265 | for (i = json ;; ++ i) |
---|
266 | { |
---|
267 | json_char b = (i == end ? 0 : *i); |
---|
268 | |
---|
269 | if (flags & flag_string) |
---|
270 | { |
---|
271 | if (!b) |
---|
272 | { sprintf (error, "Unexpected EOF in string (at %d:%d)", cur_line, e_off); |
---|
273 | goto e_failed; |
---|
274 | } |
---|
275 | |
---|
276 | if (string_length > state.uint_max) |
---|
277 | goto e_overflow; |
---|
278 | |
---|
279 | if (flags & flag_escaped) |
---|
280 | { |
---|
281 | flags &= ~ flag_escaped; |
---|
282 | |
---|
283 | switch (b) |
---|
284 | { |
---|
285 | case 'b': string_add ('\b'); break; |
---|
286 | case 'f': string_add ('\f'); break; |
---|
287 | case 'n': string_add ('\n'); break; |
---|
288 | case 'r': string_add ('\r'); break; |
---|
289 | case 't': string_add ('\t'); break; |
---|
290 | case 'u': |
---|
291 | |
---|
292 | if (end - i < 4 || |
---|
293 | (uc_b1 = hex_value (*++ i)) == 0xFF || (uc_b2 = hex_value (*++ i)) == 0xFF |
---|
294 | || (uc_b3 = hex_value (*++ i)) == 0xFF || (uc_b4 = hex_value (*++ i)) == 0xFF) |
---|
295 | { |
---|
296 | sprintf (error, "Invalid character value `%c` (at %d:%d)", b, cur_line, e_off); |
---|
297 | goto e_failed; |
---|
298 | } |
---|
299 | |
---|
300 | uc_b1 = uc_b1 * 16 + uc_b2; |
---|
301 | uc_b2 = uc_b3 * 16 + uc_b4; |
---|
302 | |
---|
303 | uchar = ((json_char) uc_b1) * 256 + uc_b2; |
---|
304 | |
---|
305 | if (sizeof (json_char) >= sizeof (json_uchar) || (uc_b1 == 0 && uc_b2 <= 0x7F)) |
---|
306 | { |
---|
307 | string_add ((json_char) uchar); |
---|
308 | break; |
---|
309 | } |
---|
310 | |
---|
311 | if (uchar <= 0x7FF) |
---|
312 | { |
---|
313 | if (state.first_pass) |
---|
314 | string_length += 2; |
---|
315 | else |
---|
316 | { string [string_length ++] = 0xC0 | ((uc_b2 & 0xC0) >> 6) | ((uc_b1 & 0x7) << 2); |
---|
317 | string [string_length ++] = 0x80 | (uc_b2 & 0x3F); |
---|
318 | } |
---|
319 | |
---|
320 | break; |
---|
321 | } |
---|
322 | |
---|
323 | if (state.first_pass) |
---|
324 | string_length += 3; |
---|
325 | else |
---|
326 | { string [string_length ++] = 0xE0 | ((uc_b1 & 0xF0) >> 4); |
---|
327 | string [string_length ++] = 0x80 | ((uc_b1 & 0xF) << 2) | ((uc_b2 & 0xC0) >> 6); |
---|
328 | string [string_length ++] = 0x80 | (uc_b2 & 0x3F); |
---|
329 | } |
---|
330 | |
---|
331 | break; |
---|
332 | |
---|
333 | default: |
---|
334 | string_add (b); |
---|
335 | }; |
---|
336 | |
---|
337 | continue; |
---|
338 | } |
---|
339 | |
---|
340 | if (b == '\\') |
---|
341 | { |
---|
342 | flags |= flag_escaped; |
---|
343 | continue; |
---|
344 | } |
---|
345 | |
---|
346 | if (b == '"') |
---|
347 | { |
---|
348 | if (!state.first_pass) |
---|
349 | string [string_length] = 0; |
---|
350 | |
---|
351 | flags &= ~ flag_string; |
---|
352 | string = 0; |
---|
353 | |
---|
354 | switch (top->type) |
---|
355 | { |
---|
356 | case json_string: |
---|
357 | |
---|
358 | top->u.string.length = string_length; |
---|
359 | flags |= flag_next; |
---|
360 | |
---|
361 | break; |
---|
362 | |
---|
363 | case json_object: |
---|
364 | |
---|
365 | if (state.first_pass) |
---|
366 | (*(json_char **) &top->u.object.values) += string_length + 1; |
---|
367 | else |
---|
368 | { |
---|
369 | top->u.object.values [top->u.object.length].name |
---|
370 | = (json_char *) top->_reserved.object_mem; |
---|
371 | |
---|
372 | top->u.object.values [top->u.object.length].name_length |
---|
373 | = string_length; |
---|
374 | |
---|
375 | (*(json_char **) &top->_reserved.object_mem) += string_length + 1; |
---|
376 | } |
---|
377 | |
---|
378 | flags |= flag_seek_value | flag_need_colon; |
---|
379 | continue; |
---|
380 | |
---|
381 | default: |
---|
382 | break; |
---|
383 | }; |
---|
384 | } |
---|
385 | else |
---|
386 | { |
---|
387 | string_add (b); |
---|
388 | continue; |
---|
389 | } |
---|
390 | } |
---|
391 | |
---|
392 | if (state.settings.settings & json_enable_comments) |
---|
393 | { |
---|
394 | if (flags & (flag_line_comment | flag_block_comment)) |
---|
395 | { |
---|
396 | if (flags & flag_line_comment) |
---|
397 | { |
---|
398 | if (b == '\r' || b == '\n' || !b) |
---|
399 | { |
---|
400 | flags &= ~ flag_line_comment; |
---|
401 | -- i; /* so null can be reproc'd */ |
---|
402 | } |
---|
403 | |
---|
404 | continue; |
---|
405 | } |
---|
406 | |
---|
407 | if (flags & flag_block_comment) |
---|
408 | { |
---|
409 | if (!b) |
---|
410 | { sprintf (error, "%d:%d: Unexpected EOF in block comment", cur_line, e_off); |
---|
411 | goto e_failed; |
---|
412 | } |
---|
413 | |
---|
414 | if (b == '*' && i < (end - 1) && i [1] == '/') |
---|
415 | { |
---|
416 | flags &= ~ flag_block_comment; |
---|
417 | ++ i; /* skip closing sequence */ |
---|
418 | } |
---|
419 | |
---|
420 | continue; |
---|
421 | } |
---|
422 | } |
---|
423 | else if (b == '/') |
---|
424 | { |
---|
425 | if (! (flags & (flag_seek_value | flag_done)) && top->type != json_object) |
---|
426 | { |
---|
427 | sprintf (error, "%d:%d: Comment not allowed here", cur_line, e_off); |
---|
428 | goto e_failed; |
---|
429 | } |
---|
430 | |
---|
431 | if (++ i == end) |
---|
432 | { sprintf (error, "%d:%d: EOF unexpected", cur_line, e_off); |
---|
433 | goto e_failed; |
---|
434 | } |
---|
435 | |
---|
436 | switch (b = *i) |
---|
437 | { |
---|
438 | case '/': |
---|
439 | flags |= flag_line_comment; |
---|
440 | continue; |
---|
441 | |
---|
442 | case '*': |
---|
443 | flags |= flag_block_comment; |
---|
444 | continue; |
---|
445 | |
---|
446 | default: |
---|
447 | sprintf (error, "%d:%d: Unexpected `%c` in comment opening sequence", cur_line, e_off, b); |
---|
448 | goto e_failed; |
---|
449 | }; |
---|
450 | } |
---|
451 | } |
---|
452 | |
---|
453 | if (flags & flag_done) |
---|
454 | { |
---|
455 | if (!b) |
---|
456 | break; |
---|
457 | |
---|
458 | switch (b) |
---|
459 | { |
---|
460 | whitespace: |
---|
461 | continue; |
---|
462 | |
---|
463 | default: |
---|
464 | sprintf (error, "%d:%d: Trailing garbage: `%c`", cur_line, e_off, b); |
---|
465 | goto e_failed; |
---|
466 | }; |
---|
467 | } |
---|
468 | |
---|
469 | if (flags & flag_seek_value) |
---|
470 | { |
---|
471 | switch (b) |
---|
472 | { |
---|
473 | whitespace: |
---|
474 | continue; |
---|
475 | |
---|
476 | case ']': |
---|
477 | |
---|
478 | if (top->type == json_array) |
---|
479 | flags = (flags & ~ (flag_need_comma | flag_seek_value)) | flag_next; |
---|
480 | else |
---|
481 | { sprintf (error, "%d:%d: Unexpected ]", cur_line, e_off); |
---|
482 | goto e_failed; |
---|
483 | } |
---|
484 | |
---|
485 | break; |
---|
486 | |
---|
487 | default: |
---|
488 | |
---|
489 | if (flags & flag_need_comma) |
---|
490 | { |
---|
491 | if (b == ',') |
---|
492 | { flags &= ~ flag_need_comma; |
---|
493 | continue; |
---|
494 | } |
---|
495 | else |
---|
496 | { sprintf (error, "%d:%d: Expected , before %c", cur_line, e_off, b); |
---|
497 | goto e_failed; |
---|
498 | } |
---|
499 | } |
---|
500 | |
---|
501 | if (flags & flag_need_colon) |
---|
502 | { |
---|
503 | if (b == ':') |
---|
504 | { flags &= ~ flag_need_colon; |
---|
505 | continue; |
---|
506 | } |
---|
507 | else |
---|
508 | { sprintf (error, "%d:%d: Expected : before %c", cur_line, e_off, b); |
---|
509 | goto e_failed; |
---|
510 | } |
---|
511 | } |
---|
512 | |
---|
513 | flags &= ~ flag_seek_value; |
---|
514 | |
---|
515 | switch (b) |
---|
516 | { |
---|
517 | case '{': |
---|
518 | |
---|
519 | if (!new_value (&state, &top, &root, &alloc, json_object)) |
---|
520 | goto e_alloc_failure; |
---|
521 | |
---|
522 | continue; |
---|
523 | |
---|
524 | case '[': |
---|
525 | |
---|
526 | if (!new_value (&state, &top, &root, &alloc, json_array)) |
---|
527 | goto e_alloc_failure; |
---|
528 | |
---|
529 | flags |= flag_seek_value; |
---|
530 | continue; |
---|
531 | |
---|
532 | case '"': |
---|
533 | |
---|
534 | if (!new_value (&state, &top, &root, &alloc, json_string)) |
---|
535 | goto e_alloc_failure; |
---|
536 | |
---|
537 | flags |= flag_string; |
---|
538 | |
---|
539 | string = top->u.string.ptr; |
---|
540 | string_length = 0; |
---|
541 | |
---|
542 | continue; |
---|
543 | |
---|
544 | case 't': |
---|
545 | |
---|
546 | if ((end - i) < 3 || *(++ i) != 'r' || *(++ i) != 'u' || *(++ i) != 'e') |
---|
547 | goto e_unknown_value; |
---|
548 | |
---|
549 | if (!new_value (&state, &top, &root, &alloc, json_boolean)) |
---|
550 | goto e_alloc_failure; |
---|
551 | |
---|
552 | top->u.boolean = 1; |
---|
553 | |
---|
554 | flags |= flag_next; |
---|
555 | break; |
---|
556 | |
---|
557 | case 'f': |
---|
558 | |
---|
559 | if ((end - i) < 4 || *(++ i) != 'a' || *(++ i) != 'l' || *(++ i) != 's' || *(++ i) != 'e') |
---|
560 | goto e_unknown_value; |
---|
561 | |
---|
562 | if (!new_value (&state, &top, &root, &alloc, json_boolean)) |
---|
563 | goto e_alloc_failure; |
---|
564 | |
---|
565 | flags |= flag_next; |
---|
566 | break; |
---|
567 | |
---|
568 | case 'n': |
---|
569 | |
---|
570 | if ((end - i) < 3 || *(++ i) != 'u' || *(++ i) != 'l' || *(++ i) != 'l') |
---|
571 | goto e_unknown_value; |
---|
572 | |
---|
573 | if (!new_value (&state, &top, &root, &alloc, json_null)) |
---|
574 | goto e_alloc_failure; |
---|
575 | |
---|
576 | flags |= flag_next; |
---|
577 | break; |
---|
578 | |
---|
579 | default: |
---|
580 | |
---|
581 | if (isdigit (b) || b == '-') |
---|
582 | { |
---|
583 | if (!new_value (&state, &top, &root, &alloc, json_integer)) |
---|
584 | goto e_alloc_failure; |
---|
585 | |
---|
586 | if (!state.first_pass) |
---|
587 | { |
---|
588 | while (isdigit (b) || b == '+' || b == '-' |
---|
589 | || b == 'e' || b == 'E' || b == '.') |
---|
590 | { |
---|
591 | if ( (++ i) == end) |
---|
592 | { |
---|
593 | b = 0; |
---|
594 | break; |
---|
595 | } |
---|
596 | |
---|
597 | b = *i; |
---|
598 | } |
---|
599 | |
---|
600 | flags |= flag_next | flag_reproc; |
---|
601 | break; |
---|
602 | } |
---|
603 | |
---|
604 | flags &= ~ (flag_num_negative | flag_num_e | |
---|
605 | flag_num_e_got_sign | flag_num_e_negative | |
---|
606 | flag_num_zero); |
---|
607 | |
---|
608 | num_digits = 0; |
---|
609 | num_fraction = 0; |
---|
610 | num_e = 0; |
---|
611 | |
---|
612 | if (b != '-') |
---|
613 | { |
---|
614 | flags |= flag_reproc; |
---|
615 | break; |
---|
616 | } |
---|
617 | |
---|
618 | flags |= flag_num_negative; |
---|
619 | continue; |
---|
620 | } |
---|
621 | else |
---|
622 | { sprintf (error, "%d:%d: Unexpected %c when seeking value", cur_line, e_off, b); |
---|
623 | goto e_failed; |
---|
624 | } |
---|
625 | }; |
---|
626 | }; |
---|
627 | } |
---|
628 | else |
---|
629 | { |
---|
630 | switch (top->type) |
---|
631 | { |
---|
632 | case json_object: |
---|
633 | |
---|
634 | switch (b) |
---|
635 | { |
---|
636 | whitespace: |
---|
637 | continue; |
---|
638 | |
---|
639 | case '"': |
---|
640 | |
---|
641 | if (flags & flag_need_comma) |
---|
642 | { |
---|
643 | sprintf (error, "%d:%d: Expected , before \"", cur_line, e_off); |
---|
644 | goto e_failed; |
---|
645 | } |
---|
646 | |
---|
647 | flags |= flag_string; |
---|
648 | |
---|
649 | string = (json_char *) top->_reserved.object_mem; |
---|
650 | string_length = 0; |
---|
651 | |
---|
652 | break; |
---|
653 | |
---|
654 | case '}': |
---|
655 | |
---|
656 | flags = (flags & ~ flag_need_comma) | flag_next; |
---|
657 | break; |
---|
658 | |
---|
659 | case ',': |
---|
660 | |
---|
661 | if (flags & flag_need_comma) |
---|
662 | { |
---|
663 | flags &= ~ flag_need_comma; |
---|
664 | break; |
---|
665 | } |
---|
666 | |
---|
667 | default: |
---|
668 | |
---|
669 | sprintf (error, "%d:%d: Unexpected `%c` in object", cur_line, e_off, b); |
---|
670 | goto e_failed; |
---|
671 | }; |
---|
672 | |
---|
673 | break; |
---|
674 | |
---|
675 | case json_integer: |
---|
676 | case json_double: |
---|
677 | |
---|
678 | if (isdigit (b)) |
---|
679 | { |
---|
680 | ++ num_digits; |
---|
681 | |
---|
682 | if (top->type == json_integer || flags & flag_num_e) |
---|
683 | { |
---|
684 | if (! (flags & flag_num_e)) |
---|
685 | { |
---|
686 | if (flags & flag_num_zero) |
---|
687 | { sprintf (error, "%d:%d: Unexpected `0` before `%c`", cur_line, e_off, b); |
---|
688 | goto e_failed; |
---|
689 | } |
---|
690 | |
---|
691 | if (num_digits == 1 && b == '0') |
---|
692 | flags |= flag_num_zero; |
---|
693 | } |
---|
694 | else |
---|
695 | { |
---|
696 | flags |= flag_num_e_got_sign; |
---|
697 | num_e = (num_e * 10) + (b - '0'); |
---|
698 | continue; |
---|
699 | } |
---|
700 | |
---|
701 | top->u.integer = (top->u.integer * 10) + (b - '0'); |
---|
702 | continue; |
---|
703 | } |
---|
704 | |
---|
705 | num_fraction = (num_fraction * 10) + (b - '0'); |
---|
706 | continue; |
---|
707 | } |
---|
708 | |
---|
709 | if (b == '+' || b == '-') |
---|
710 | { |
---|
711 | if ( (flags & flag_num_e) && !(flags & flag_num_e_got_sign)) |
---|
712 | { |
---|
713 | flags |= flag_num_e_got_sign; |
---|
714 | |
---|
715 | if (b == '-') |
---|
716 | flags |= flag_num_e_negative; |
---|
717 | |
---|
718 | continue; |
---|
719 | } |
---|
720 | } |
---|
721 | else if (b == '.' && top->type == json_integer) |
---|
722 | { |
---|
723 | if (!num_digits) |
---|
724 | { sprintf (error, "%d:%d: Expected digit before `.`", cur_line, e_off); |
---|
725 | goto e_failed; |
---|
726 | } |
---|
727 | |
---|
728 | top->type = json_double; |
---|
729 | top->u.dbl = (double) top->u.integer; |
---|
730 | |
---|
731 | num_digits = 0; |
---|
732 | continue; |
---|
733 | } |
---|
734 | |
---|
735 | if (! (flags & flag_num_e)) |
---|
736 | { |
---|
737 | if (top->type == json_double) |
---|
738 | { |
---|
739 | if (!num_digits) |
---|
740 | { sprintf (error, "%d:%d: Expected digit after `.`", cur_line, e_off); |
---|
741 | goto e_failed; |
---|
742 | } |
---|
743 | |
---|
744 | top->u.dbl += ((double) num_fraction) / (pow (10, (double) num_digits)); |
---|
745 | } |
---|
746 | |
---|
747 | if (b == 'e' || b == 'E') |
---|
748 | { |
---|
749 | flags |= flag_num_e; |
---|
750 | |
---|
751 | if (top->type == json_integer) |
---|
752 | { |
---|
753 | top->type = json_double; |
---|
754 | top->u.dbl = (double) top->u.integer; |
---|
755 | } |
---|
756 | |
---|
757 | num_digits = 0; |
---|
758 | flags &= ~ flag_num_zero; |
---|
759 | |
---|
760 | continue; |
---|
761 | } |
---|
762 | } |
---|
763 | else |
---|
764 | { |
---|
765 | if (!num_digits) |
---|
766 | { sprintf (error, "%d:%d: Expected digit after `e`", cur_line, e_off); |
---|
767 | goto e_failed; |
---|
768 | } |
---|
769 | |
---|
770 | top->u.dbl *= pow (10, (double) (flags & flag_num_e_negative ? - num_e : num_e)); |
---|
771 | } |
---|
772 | |
---|
773 | if (flags & flag_num_negative) |
---|
774 | { |
---|
775 | if (top->type == json_integer) |
---|
776 | top->u.integer = - top->u.integer; |
---|
777 | else |
---|
778 | top->u.dbl = - top->u.dbl; |
---|
779 | } |
---|
780 | |
---|
781 | flags |= flag_next | flag_reproc; |
---|
782 | break; |
---|
783 | |
---|
784 | default: |
---|
785 | break; |
---|
786 | }; |
---|
787 | } |
---|
788 | |
---|
789 | if (flags & flag_reproc) |
---|
790 | { |
---|
791 | flags &= ~ flag_reproc; |
---|
792 | -- i; |
---|
793 | } |
---|
794 | |
---|
795 | if (flags & flag_next) |
---|
796 | { |
---|
797 | flags = (flags & ~ flag_next) | flag_need_comma; |
---|
798 | |
---|
799 | if (!top->parent) |
---|
800 | { |
---|
801 | /* root value done */ |
---|
802 | |
---|
803 | flags |= flag_done; |
---|
804 | continue; |
---|
805 | } |
---|
806 | |
---|
807 | if (top->parent->type == json_array) |
---|
808 | flags |= flag_seek_value; |
---|
809 | |
---|
810 | if (!state.first_pass) |
---|
811 | { |
---|
812 | json_value * parent = top->parent; |
---|
813 | |
---|
814 | switch (parent->type) |
---|
815 | { |
---|
816 | case json_object: |
---|
817 | |
---|
818 | parent->u.object.values |
---|
819 | [parent->u.object.length].value = top; |
---|
820 | |
---|
821 | break; |
---|
822 | |
---|
823 | case json_array: |
---|
824 | |
---|
825 | parent->u.array.values |
---|
826 | [parent->u.array.length] = top; |
---|
827 | |
---|
828 | break; |
---|
829 | |
---|
830 | default: |
---|
831 | break; |
---|
832 | }; |
---|
833 | } |
---|
834 | |
---|
835 | if ( (++ top->parent->u.array.length) > state.uint_max) |
---|
836 | goto e_overflow; |
---|
837 | |
---|
838 | top = top->parent; |
---|
839 | |
---|
840 | continue; |
---|
841 | } |
---|
842 | } |
---|
843 | |
---|
844 | alloc = root; |
---|
845 | } |
---|
846 | |
---|
847 | return root; |
---|
848 | |
---|
849 | e_unknown_value: |
---|
850 | |
---|
851 | sprintf (error, "%d:%d: Unknown value", cur_line, e_off); |
---|
852 | goto e_failed; |
---|
853 | |
---|
854 | e_alloc_failure: |
---|
855 | |
---|
856 | strcpy (error, "Memory allocation failure"); |
---|
857 | goto e_failed; |
---|
858 | |
---|
859 | e_overflow: |
---|
860 | |
---|
861 | sprintf (error, "%d:%d: Too long (caught overflow)", cur_line, e_off); |
---|
862 | goto e_failed; |
---|
863 | |
---|
864 | e_failed: |
---|
865 | |
---|
866 | if (error_buf) |
---|
867 | { |
---|
868 | if (*error) |
---|
869 | strcpy (error_buf, error); |
---|
870 | else |
---|
871 | strcpy (error_buf, "Unknown error"); |
---|
872 | } |
---|
873 | |
---|
874 | if (state.first_pass) |
---|
875 | alloc = root; |
---|
876 | |
---|
877 | while (alloc) |
---|
878 | { |
---|
879 | top = alloc->_reserved.next_alloc; |
---|
880 | state.settings.mem_free (alloc, state.settings.user_data); |
---|
881 | alloc = top; |
---|
882 | } |
---|
883 | |
---|
884 | if (!state.first_pass) |
---|
885 | json_value_free_ex (&state.settings, root); |
---|
886 | |
---|
887 | return 0; |
---|
888 | } |
---|
889 | |
---|
890 | json_value * json_parse (const json_char * json, size_t length) |
---|
891 | { |
---|
892 | json_settings settings = { 0 }; |
---|
893 | return json_parse_ex (&settings, json, length, 0); |
---|
894 | } |
---|
895 | |
---|
896 | void json_value_free_ex (json_settings * settings, json_value * value) |
---|
897 | { |
---|
898 | json_value * cur_value; |
---|
899 | |
---|
900 | if (!value) |
---|
901 | return; |
---|
902 | |
---|
903 | value->parent = 0; |
---|
904 | |
---|
905 | while (value) |
---|
906 | { |
---|
907 | switch (value->type) |
---|
908 | { |
---|
909 | case json_array: |
---|
910 | |
---|
911 | if (!value->u.array.length) |
---|
912 | { |
---|
913 | settings->mem_free (value->u.array.values, settings->user_data); |
---|
914 | break; |
---|
915 | } |
---|
916 | |
---|
917 | value = value->u.array.values [-- value->u.array.length]; |
---|
918 | continue; |
---|
919 | |
---|
920 | case json_object: |
---|
921 | |
---|
922 | if (!value->u.object.length) |
---|
923 | { |
---|
924 | settings->mem_free (value->u.object.values, settings->user_data); |
---|
925 | break; |
---|
926 | } |
---|
927 | |
---|
928 | value = value->u.object.values [-- value->u.object.length].value; |
---|
929 | continue; |
---|
930 | |
---|
931 | case json_string: |
---|
932 | |
---|
933 | settings->mem_free (value->u.string.ptr, settings->user_data); |
---|
934 | break; |
---|
935 | |
---|
936 | default: |
---|
937 | break; |
---|
938 | }; |
---|
939 | |
---|
940 | cur_value = value; |
---|
941 | value = value->parent; |
---|
942 | settings->mem_free (cur_value, settings->user_data); |
---|
943 | } |
---|
944 | } |
---|
945 | |
---|
946 | void json_value_free (json_value * value) |
---|
947 | { |
---|
948 | json_settings settings = { 0 }; |
---|
949 | settings.mem_free = default_free; |
---|
950 | json_value_free_ex (&settings, value); |
---|
951 | } |
---|
952 | |
---|