Code Commits61
t
Download ZIP
3,206 lines79 KBC
1/*
2 Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
3
4 Permission is hereby granted, free of charge, to any person obtaining a copy
5 of this software and associated documentation files (the "Software"), to deal
6 in the Software without restriction, including without limitation the rights
7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 copies of the Software, and to permit persons to whom the Software is
9 furnished to do so, subject to the following conditions:
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 THE SOFTWARE.
21*/
22
23/* cJSON */
24/* JSON parser in C. */
25
26/* disable warnings about old C89 functions in MSVC */
27#if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER)
28#define _CRT_SECURE_NO_DEPRECATE
29#endif
30
31#ifdef __GNUC__
32#pragma GCC visibility push(default)
33#endif
34#if defined(_MSC_VER)
35#pragma warning (push)
36/* disable warning about single line comments in system headers */
37#pragma warning (disable : 4001)
38#endif
39
40#include <string.h>
41#include <stdio.h>
42#include <math.h>
43#include <stdlib.h>
44#include <limits.h>
45#include <ctype.h>
46#include <float.h>
47
48#ifdef ENABLE_LOCALES
49#include <locale.h>
50#endif
51
52#if defined(_MSC_VER)
53#pragma warning (pop)
54#endif
55#ifdef __GNUC__
56#pragma GCC visibility pop
57#endif
58
59#include "cJSON.h"
60
61/* define our own boolean type */
62#ifdef true
63#undef true
64#endif
65#define true ((cJSON_bool)1)
66
67#ifdef false
68#undef false
69#endif
70#define false ((cJSON_bool)0)
71
72/* define isnan and isinf for ANSI C, if in C99 or above, isnan and isinf has been defined in math.h */
73#ifndef isinf
74#define isinf(d) (isnan((d - d)) && !isnan(d))
75#endif
76#ifndef isnan
77#define isnan(d) (d != d)
78#endif
79
80#ifndef NAN
81#ifdef _WIN32
82#define NAN sqrt(-1.0)
83#else
84#define NAN 0.0/0.0
85#endif
86#endif
87
88typedef struct {
89 const unsigned char *json;
90 size_t position;
91} error;
92static error global_error = { NULL, 0 };
93
94CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
95{
96 return (const char*) (global_error.json + global_error.position);
97}
98
99CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item)
100{
101 if (!cJSON_IsString(item))
102 {
103 return NULL;
104 }
105
106 return item->valuestring;
107}
108
109CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item)
110{
111 if (!cJSON_IsNumber(item))
112 {
113 return (double) NAN;
114 }
115
116 return item->valuedouble;
117}
118
119/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
120#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 19)
121 #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
122#endif
123
124CJSON_PUBLIC(const char*) cJSON_Version(void)
125{
126 static char version[15];
127 sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
128
129 return version;
130}
131
132/* Case insensitive string comparison, doesn't consider two NULL pointers equal though */
133static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2)
134{
135 if ((string1 == NULL) || (string2 == NULL))
136 {
137 return 1;
138 }
139
140 if (string1 == string2)
141 {
142 return 0;
143 }
144
145 for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++)
146 {
147 if (*string1 == '\0')
148 {
149 return 0;
150 }
151 }
152
153 return tolower(*string1) - tolower(*string2);
154}
155
156typedef struct internal_hooks
157{
158 void *(CJSON_CDECL *allocate)(size_t size);
159 void (CJSON_CDECL *deallocate)(void *pointer);
160 void *(CJSON_CDECL *reallocate)(void *pointer, size_t size);
161} internal_hooks;
162
163#if defined(_MSC_VER)
164/* work around MSVC error C2322: '...' address of dllimport '...' is not static */
165static void * CJSON_CDECL internal_malloc(size_t size)
166{
167 return malloc(size);
168}
169static void CJSON_CDECL internal_free(void *pointer)
170{
171 free(pointer);
172}
173static void * CJSON_CDECL internal_realloc(void *pointer, size_t size)
174{
175 return realloc(pointer, size);
176}
177#else
178#define internal_malloc malloc
179#define internal_free free
180#define internal_realloc realloc
181#endif
182
183/* strlen of character literals resolved at compile time */
184#define static_strlen(string_literal) (sizeof(string_literal) - sizeof(""))
185
186static internal_hooks global_hooks = { internal_malloc, internal_free, internal_realloc };
187
188static unsigned char* cJSON_strdup(const unsigned char* string, const internal_hooks * const hooks)
189{
190 size_t length = 0;
191 unsigned char *copy = NULL;
192
193 if (string == NULL)
194 {
195 return NULL;
196 }
197
198 length = strlen((const char*)string) + sizeof("");
199 copy = (unsigned char*)hooks->allocate(length);
200 if (copy == NULL)
201 {
202 return NULL;
203 }
204 memcpy(copy, string, length);
205
206 return copy;
207}
208
209CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks)
210{
211 if (hooks == NULL)
212 {
213 /* Reset hooks */
214 global_hooks.allocate = malloc;
215 global_hooks.deallocate = free;
216 global_hooks.reallocate = realloc;
217 return;
218 }
219
220 global_hooks.allocate = malloc;
221 if (hooks->malloc_fn != NULL)
222 {
223 global_hooks.allocate = hooks->malloc_fn;
224 }
225
226 global_hooks.deallocate = free;
227 if (hooks->free_fn != NULL)
228 {
229 global_hooks.deallocate = hooks->free_fn;
230 }
231
232 /* use realloc only if both free and malloc are used */
233 global_hooks.reallocate = NULL;
234 if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free))
235 {
236 global_hooks.reallocate = realloc;
237 }
238}
239
240/* Internal constructor. */
241static cJSON *cJSON_New_Item(const internal_hooks * const hooks)
242{
243 cJSON* node = (cJSON*)hooks->allocate(sizeof(cJSON));
244 if (node)
245 {
246 memset(node, '\0', sizeof(cJSON));
247 }
248
249 return node;
250}
251
252/* Delete a cJSON structure. */
253CJSON_PUBLIC(void) cJSON_Delete(cJSON *item)
254{
255 cJSON *next = NULL;
256 while (item != NULL)
257 {
258 next = item->next;
259 if (!(item->type & cJSON_IsReference) && (item->child != NULL))
260 {
261 cJSON_Delete(item->child);
262 }
263 if (!(item->type & cJSON_IsReference) && (item->valuestring != NULL))
264 {
265 global_hooks.deallocate(item->valuestring);
266 item->valuestring = NULL;
267 }
268 if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
269 {
270 global_hooks.deallocate(item->string);
271 item->string = NULL;
272 }
273 global_hooks.deallocate(item);
274 item = next;
275 }
276}
277
278/* get the decimal point character of the current locale */
279static unsigned char get_decimal_point(void)
280{
281#ifdef ENABLE_LOCALES
282 struct lconv *lconv = localeconv();
283 return (unsigned char) lconv->decimal_point[0];
284#else
285 return '.';
286#endif
287}
288
289typedef struct
290{
291 const unsigned char *content;
292 size_t length;
293 size_t offset;
294 size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */
295 internal_hooks hooks;
296} parse_buffer;
297
298/* check if the given size is left to read in a given parse buffer (starting with 1) */
299#define can_read(buffer, size) ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length))
300/* check if the buffer can be accessed at the given index (starting with 0) */
301#define can_access_at_index(buffer, index) ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length))
302#define cannot_access_at_index(buffer, index) (!can_access_at_index(buffer, index))
303/* get a pointer to the buffer at the position */
304#define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset)
305
306/* Parse the input text to generate a number, and populate the result into item. */
307static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
308{
309 double number = 0;
310 unsigned char *after_end = NULL;
311 unsigned char *number_c_string;
312 unsigned char decimal_point = get_decimal_point();
313 size_t i = 0;
314 size_t number_string_length = 0;
315 cJSON_bool has_decimal_point = false;
316
317 if ((input_buffer == NULL) || (input_buffer->content == NULL))
318 {
319 return false;
320 }
321
322 /* copy the number into a temporary buffer and replace '.' with the decimal point
323 * of the current locale (for strtod)
324 * This also takes care of '\0' not necessarily being available for marking the end of the input */
325 for (i = 0; can_access_at_index(input_buffer, i); i++)
326 {
327 switch (buffer_at_offset(input_buffer)[i])
328 {
329 case '0':
330 case '1':
331 case '2':
332 case '3':
333 case '4':
334 case '5':
335 case '6':
336 case '7':
337 case '8':
338 case '9':
339 case '+':
340 case '-':
341 case 'e':
342 case 'E':
343 number_string_length++;
344 break;
345
346 case '.':
347 number_string_length++;
348 has_decimal_point = true;
349 break;
350
351 default:
352 goto loop_end;
353 }
354 }
355loop_end:
356 /* malloc for temporary buffer, add 1 for '\0' */
357 number_c_string = (unsigned char *) input_buffer->hooks.allocate(number_string_length + 1);
358 if (number_c_string == NULL)
359 {
360 return false; /* allocation failure */
361 }
362
363 memcpy(number_c_string, buffer_at_offset(input_buffer), number_string_length);
364 number_c_string[number_string_length] = '\0';
365
366 if (has_decimal_point)
367 {
368 for (i = 0; i < number_string_length; i++)
369 {
370 if (number_c_string[i] == '.')
371 {
372 /* replace '.' with the decimal point of the current locale (for strtod) */
373 number_c_string[i] = decimal_point;
374 }
375 }
376 }
377
378 number = strtod((const char*)number_c_string, (char**)&after_end);
379 if (number_c_string == after_end)
380 {
381 /* free the temporary buffer */
382 input_buffer->hooks.deallocate(number_c_string);
383 return false; /* parse_error */
384 }
385
386 item->valuedouble = number;
387
388 /* use saturation in case of overflow */
389 if (number >= INT_MAX)
390 {
391 item->valueint = INT_MAX;
392 }
393 else if (number <= (double)INT_MIN)
394 {
395 item->valueint = INT_MIN;
396 }
397 else
398 {
399 item->valueint = (int)number;
400 }
401
402 item->type = cJSON_Number;
403
404 input_buffer->offset += (size_t)(after_end - number_c_string);
405 /* free the temporary buffer */
406 input_buffer->hooks.deallocate(number_c_string);
407 return true;
408}
409
410/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
411CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number)
412{
413 if (object == NULL)
414 {
415 return (double)NAN;
416 }
417
418 if (number >= INT_MAX)
419 {
420 object->valueint = INT_MAX;
421 }
422 else if (number <= (double)INT_MIN)
423 {
424 object->valueint = INT_MIN;
425 }
426 else
427 {
428 object->valueint = (int)number;
429 }
430
431 return object->valuedouble = number;
432}
433
434/* Note: when passing a NULL valuestring, cJSON_SetValuestring treats this as an error and return NULL */
435CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring)
436{
437 char *copy = NULL;
438 size_t v1_len;
439 size_t v2_len;
440 /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */
441 if ((object == NULL) || !(object->type & cJSON_String) || (object->type & cJSON_IsReference))
442 {
443 return NULL;
444 }
445 /* return NULL if the object is corrupted or valuestring is NULL */
446 if (object->valuestring == NULL || valuestring == NULL)
447 {
448 return NULL;
449 }
450
451 v1_len = strlen(valuestring);
452 v2_len = strlen(object->valuestring);
453
454 if (v1_len <= v2_len)
455 {
456 /* strcpy does not handle overlapping string: [X1, X2] [Y1, Y2] => X2 < Y1 or Y2 < X1 */
457 if (!( valuestring + v1_len < object->valuestring || object->valuestring + v2_len < valuestring ))
458 {
459 return NULL;
460 }
461 strcpy(object->valuestring, valuestring);
462 return object->valuestring;
463 }
464 copy = (char*) cJSON_strdup((const unsigned char*)valuestring, &global_hooks);
465 if (copy == NULL)
466 {
467 return NULL;
468 }
469 if (object->valuestring != NULL)
470 {
471 cJSON_free(object->valuestring);
472 }
473 object->valuestring = copy;
474
475 return copy;
476}
477
478typedef struct
479{
480 unsigned char *buffer;
481 size_t length;
482 size_t offset;
483 size_t depth; /* current nesting depth (for formatted printing) */
484 cJSON_bool noalloc;
485 cJSON_bool format; /* is this print a formatted print */
486 internal_hooks hooks;
487} printbuffer;
488
489/* realloc printbuffer if necessary to have at least "needed" bytes more */
490static unsigned char* ensure(printbuffer * const p, size_t needed)
491{
492 unsigned char *newbuffer = NULL;
493 size_t newsize = 0;
494
495 if ((p == NULL) || (p->buffer == NULL))
496 {
497 return NULL;
498 }
499
500 if ((p->length > 0) && (p->offset >= p->length))
501 {
502 /* make sure that offset is valid */
503 return NULL;
504 }
505
506 if (needed > INT_MAX)
507 {
508 /* sizes bigger than INT_MAX are currently not supported */
509 return NULL;
510 }
511
512 needed += p->offset + 1;
513 if (needed <= p->length)
514 {
515 return p->buffer + p->offset;
516 }
517
518 if (p->noalloc) {
519 return NULL;
520 }
521
522 /* calculate new buffer size */
523 if (needed > (INT_MAX / 2))
524 {
525 /* overflow of int, use INT_MAX if possible */
526 if (needed <= INT_MAX)
527 {
528 newsize = INT_MAX;
529 }
530 else
531 {
532 return NULL;
533 }
534 }
535 else
536 {
537 newsize = needed * 2;
538 }
539
540 if (p->hooks.reallocate != NULL)
541 {
542 /* reallocate with realloc if available */
543 newbuffer = (unsigned char*)p->hooks.reallocate(p->buffer, newsize);
544 if (newbuffer == NULL)
545 {
546 p->hooks.deallocate(p->buffer);
547 p->length = 0;
548 p->buffer = NULL;
549
550 return NULL;
551 }
552 }
553 else
554 {
555 /* otherwise reallocate manually */
556 newbuffer = (unsigned char*)p->hooks.allocate(newsize);
557 if (!newbuffer)
558 {
559 p->hooks.deallocate(p->buffer);
560 p->length = 0;
561 p->buffer = NULL;
562
563 return NULL;
564 }
565
566 memcpy(newbuffer, p->buffer, p->offset + 1);
567 p->hooks.deallocate(p->buffer);
568 }
569 p->length = newsize;
570 p->buffer = newbuffer;
571
572 return newbuffer + p->offset;
573}
574
575/* calculate the new length of the string in a printbuffer and update the offset */
576static void update_offset(printbuffer * const buffer)
577{
578 const unsigned char *buffer_pointer = NULL;
579 if ((buffer == NULL) || (buffer->buffer == NULL))
580 {
581 return;
582 }
583 buffer_pointer = buffer->buffer + buffer->offset;
584
585 buffer->offset += strlen((const char*)buffer_pointer);
586}
587
588/* securely comparison of floating-point variables */
589static cJSON_bool compare_double(double a, double b)
590{
591 double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b);
592 return (fabs(a - b) <= maxVal * DBL_EPSILON);
593}
594
595/* Render the number nicely from the given item into a string. */
596static cJSON_bool print_number(const cJSON * const item, printbuffer * const output_buffer)
597{
598 unsigned char *output_pointer = NULL;
599 double d = item->valuedouble;
600 int length = 0;
601 size_t i = 0;
602 unsigned char number_buffer[26] = {0}; /* temporary buffer to print the number into */
603 unsigned char decimal_point = get_decimal_point();
604 double test = 0.0;
605
606 if (output_buffer == NULL)
607 {
608 return false;
609 }
610
611 /* This checks for NaN and Infinity */
612 if (isnan(d) || isinf(d))
613 {
614 length = sprintf((char*)number_buffer, "null");
615 }
616 else if(d == (double)item->valueint)
617 {
618 length = sprintf((char*)number_buffer, "%d", item->valueint);
619 }
620 else
621 {
622 /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */
623 length = sprintf((char*)number_buffer, "%1.15g", d);
624
625 /* Check whether the original double can be recovered */
626 if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || !compare_double((double)test, d))
627 {
628 /* If not, print with 17 decimal places of precision */
629 length = sprintf((char*)number_buffer, "%1.17g", d);
630 }
631 }
632
633 /* sprintf failed or buffer overrun occurred */
634 if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1)))
635 {
636 return false;
637 }
638
639 /* reserve appropriate space in the output */
640 output_pointer = ensure(output_buffer, (size_t)length + sizeof(""));
641 if (output_pointer == NULL)
642 {
643 return false;
644 }
645
646 /* copy the printed number to the output and replace locale
647 * dependent decimal point with '.' */
648 for (i = 0; i < ((size_t)length); i++)
649 {
650 if (number_buffer[i] == decimal_point)
651 {
652 output_pointer[i] = '.';
653 continue;
654 }
655
656 output_pointer[i] = number_buffer[i];
657 }
658 output_pointer[i] = '\0';
659
660 output_buffer->offset += (size_t)length;
661
662 return true;
663}
664
665/* parse 4 digit hexadecimal number */
666static unsigned parse_hex4(const unsigned char * const input)
667{
668 unsigned int h = 0;
669 size_t i = 0;
670
671 for (i = 0; i < 4; i++)
672 {
673 /* parse digit */
674 if ((input[i] >= '0') && (input[i] <= '9'))
675 {
676 h += (unsigned int) input[i] - '0';
677 }
678 else if ((input[i] >= 'A') && (input[i] <= 'F'))
679 {
680 h += (unsigned int) 10 + input[i] - 'A';
681 }
682 else if ((input[i] >= 'a') && (input[i] <= 'f'))
683 {
684 h += (unsigned int) 10 + input[i] - 'a';
685 }
686 else /* invalid */
687 {
688 return 0;
689 }
690
691 if (i < 3)
692 {
693 /* shift left to make place for the next nibble */
694 h = h << 4;
695 }
696 }
697
698 return h;
699}
700
701/* converts a UTF-16 literal to UTF-8
702 * A literal can be one or two sequences of the form \uXXXX */
703static unsigned char utf16_literal_to_utf8(const unsigned char * const input_pointer, const unsigned char * const input_end, unsigned char **output_pointer)
704{
705 long unsigned int codepoint = 0;
706 unsigned int first_code = 0;
707 const unsigned char *first_sequence = input_pointer;
708 unsigned char utf8_length = 0;
709 unsigned char utf8_position = 0;
710 unsigned char sequence_length = 0;
711 unsigned char first_byte_mark = 0;
712
713 if ((input_end - first_sequence) < 6)
714 {
715 /* input ends unexpectedly */
716 goto fail;
717 }
718
719 /* get the first utf16 sequence */
720 first_code = parse_hex4(first_sequence + 2);
721
722 /* check that the code is valid */
723 if (((first_code >= 0xDC00) && (first_code <= 0xDFFF)))
724 {
725 goto fail;
726 }
727
728 /* UTF16 surrogate pair */
729 if ((first_code >= 0xD800) && (first_code <= 0xDBFF))
730 {
731 const unsigned char *second_sequence = first_sequence + 6;
732 unsigned int second_code = 0;
733 sequence_length = 12; /* \uXXXX\uXXXX */
734
735 if ((input_end - second_sequence) < 6)
736 {
737 /* input ends unexpectedly */
738 goto fail;
739 }
740
741 if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u'))
742 {
743 /* missing second half of the surrogate pair */
744 goto fail;
745 }
746
747 /* get the second utf16 sequence */
748 second_code = parse_hex4(second_sequence + 2);
749 /* check that the code is valid */
750 if ((second_code < 0xDC00) || (second_code > 0xDFFF))
751 {
752 /* invalid second half of the surrogate pair */
753 goto fail;
754 }
755
756
757 /* calculate the unicode codepoint from the surrogate pair */
758 codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF));
759 }
760 else
761 {
762 sequence_length = 6; /* \uXXXX */
763 codepoint = first_code;
764 }
765
766 /* encode as UTF-8
767 * takes at maximum 4 bytes to encode:
768 * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
769 if (codepoint < 0x80)
770 {
771 /* normal ascii, encoding 0xxxxxxx */
772 utf8_length = 1;
773 }
774 else if (codepoint < 0x800)
775 {
776 /* two bytes, encoding 110xxxxx 10xxxxxx */
777 utf8_length = 2;
778 first_byte_mark = 0xC0; /* 11000000 */
779 }
780 else if (codepoint < 0x10000)
781 {
782 /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
783 utf8_length = 3;
784 first_byte_mark = 0xE0; /* 11100000 */
785 }
786 else if (codepoint <= 0x10FFFF)
787 {
788 /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */
789 utf8_length = 4;
790 first_byte_mark = 0xF0; /* 11110000 */
791 }
792 else
793 {
794 /* invalid unicode codepoint */
795 goto fail;
796 }
797
798 /* encode as utf8 */
799 for (utf8_position = (unsigned char)(utf8_length - 1); utf8_position > 0; utf8_position--)
800 {
801 /* 10xxxxxx */
802 (*output_pointer)[utf8_position] = (unsigned char)((codepoint | 0x80) & 0xBF);
803 codepoint >>= 6;
804 }
805 /* encode first byte */
806 if (utf8_length > 1)
807 {
808 (*output_pointer)[0] = (unsigned char)((codepoint | first_byte_mark) & 0xFF);
809 }
810 else
811 {
812 (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F);
813 }
814
815 *output_pointer += utf8_length;
816
817 return sequence_length;
818
819fail:
820 return 0;
821}
822
823/* Parse the input text into an unescaped cinput, and populate item. */
824static cJSON_bool parse_string(cJSON * const item, parse_buffer * const input_buffer)
825{
826 const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1;
827 const unsigned char *input_end = buffer_at_offset(input_buffer) + 1;
828 unsigned char *output_pointer = NULL;
829 unsigned char *output = NULL;
830
831 /* not a string */
832 if (buffer_at_offset(input_buffer)[0] != '\"')
833 {
834 goto fail;
835 }
836
837 {
838 /* calculate approximate size of the output (overestimate) */
839 size_t allocation_length = 0;
840 size_t skipped_bytes = 0;
841 while (((size_t)(input_end - input_buffer->content) < input_buffer->length) && (*input_end != '\"'))
842 {
843 /* is escape sequence */
844 if (input_end[0] == '\\')
845 {
846 if ((size_t)(input_end + 1 - input_buffer->content) >= input_buffer->length)
847 {
848 /* prevent buffer overflow when last input character is a backslash */
849 goto fail;
850 }
851 skipped_bytes++;
852 input_end++;
853 }
854 input_end++;
855 }
856 if (((size_t)(input_end - input_buffer->content) >= input_buffer->length) || (*input_end != '\"'))
857 {
858 goto fail; /* string ended unexpectedly */
859 }
860
861 /* This is at most how much we need for the output */
862 allocation_length = (size_t) (input_end - buffer_at_offset(input_buffer)) - skipped_bytes;
863 output = (unsigned char*)input_buffer->hooks.allocate(allocation_length + sizeof(""));
864 if (output == NULL)
865 {
866 goto fail; /* allocation failure */
867 }
868 }
869
870 output_pointer = output;
871 /* loop through the string literal */
872 while (input_pointer < input_end)
873 {
874 if (*input_pointer != '\\')
875 {
876 *output_pointer++ = *input_pointer++;
877 }
878 /* escape sequence */
879 else
880 {
881 unsigned char sequence_length = 2;
882 if ((input_end - input_pointer) < 1)
883 {
884 goto fail;
885 }
886
887 switch (input_pointer[1])
888 {
889 case 'b':
890 *output_pointer++ = '\b';
891 break;
892 case 'f':
893 *output_pointer++ = '\f';
894 break;
895 case 'n':
896 *output_pointer++ = '\n';
897 break;
898 case 'r':
899 *output_pointer++ = '\r';
900 break;
901 case 't':
902 *output_pointer++ = '\t';
903 break;
904 case '\"':
905 case '\\':
906 case '/':
907 *output_pointer++ = input_pointer[1];
908 break;
909
910 /* UTF-16 literal */
911 case 'u':
912 sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer);
913 if (sequence_length == 0)
914 {
915 /* failed to convert UTF16-literal to UTF-8 */
916 goto fail;
917 }
918 break;
919
920 default:
921 goto fail;
922 }
923 input_pointer += sequence_length;
924 }
925 }
926
927 /* zero terminate the output */
928 *output_pointer = '\0';
929
930 item->type = cJSON_String;
931 item->valuestring = (char*)output;
932
933 input_buffer->offset = (size_t) (input_end - input_buffer->content);
934 input_buffer->offset++;
935
936 return true;
937
938fail:
939 if (output != NULL)
940 {
941 input_buffer->hooks.deallocate(output);
942 output = NULL;
943 }
944
945 if (input_pointer != NULL)
946 {
947 input_buffer->offset = (size_t)(input_pointer - input_buffer->content);
948 }
949
950 return false;
951}
952
953/* Render the cstring provided to an escaped version that can be printed. */
954static cJSON_bool print_string_ptr(const unsigned char * const input, printbuffer * const output_buffer)
955{
956 const unsigned char *input_pointer = NULL;
957 unsigned char *output = NULL;
958 unsigned char *output_pointer = NULL;
959 size_t output_length = 0;
960 /* numbers of additional characters needed for escaping */
961 size_t escape_characters = 0;
962
963 if (output_buffer == NULL)
964 {
965 return false;
966 }
967
968 /* empty string */
969 if (input == NULL)
970 {
971 output = ensure(output_buffer, sizeof("\"\""));
972 if (output == NULL)
973 {
974 return false;
975 }
976 strcpy((char*)output, "\"\"");
977
978 return true;
979 }
980
981 /* set "flag" to 1 if something needs to be escaped */
982 for (input_pointer = input; *input_pointer; input_pointer++)
983 {
984 switch (*input_pointer)
985 {
986 case '\"':
987 case '\\':
988 case '\b':
989 case '\f':
990 case '\n':
991 case '\r':
992 case '\t':
993 /* one character escape sequence */
994 escape_characters++;
995 break;
996 default:
997 if (*input_pointer < 32)
998 {
999 /* UTF-16 escape sequence uXXXX */
1000 escape_characters += 5;
1001 }
1002 break;
1003 }
1004 }
1005 output_length = (size_t)(input_pointer - input) + escape_characters;
1006
1007 output = ensure(output_buffer, output_length + sizeof("\"\""));
1008 if (output == NULL)
1009 {
1010 return false;
1011 }
1012
1013 /* no characters have to be escaped */
1014 if (escape_characters == 0)
1015 {
1016 output[0] = '\"';
1017 memcpy(output + 1, input, output_length);
1018 output[output_length + 1] = '\"';
1019 output[output_length + 2] = '\0';
1020
1021 return true;
1022 }
1023
1024 output[0] = '\"';
1025 output_pointer = output + 1;
1026 /* copy the string */
1027 for (input_pointer = input; *input_pointer != '\0'; (void)input_pointer++, output_pointer++)
1028 {
1029 if ((*input_pointer > 31) && (*input_pointer != '\"') && (*input_pointer != '\\'))
1030 {
1031 /* normal character, copy */
1032 *output_pointer = *input_pointer;
1033 }
1034 else
1035 {
1036 /* character needs to be escaped */
1037 *output_pointer++ = '\\';
1038 switch (*input_pointer)
1039 {
1040 case '\\':
1041 *output_pointer = '\\';
1042 break;
1043 case '\"':
1044 *output_pointer = '\"';
1045 break;
1046 case '\b':
1047 *output_pointer = 'b';
1048 break;
1049 case '\f':
1050 *output_pointer = 'f';
1051 break;
1052 case '\n':
1053 *output_pointer = 'n';
1054 break;
1055 case '\r':
1056 *output_pointer = 'r';
1057 break;
1058 case '\t':
1059 *output_pointer = 't';
1060 break;
1061 default:
1062 /* escape and print as unicode codepoint */
1063 sprintf((char*)output_pointer, "u%04x", *input_pointer);
1064 output_pointer += 4;
1065 break;
1066 }
1067 }
1068 }
1069 output[output_length + 1] = '\"';
1070 output[output_length + 2] = '\0';
1071
1072 return true;
1073}
1074
1075/* Invoke print_string_ptr (which is useful) on an item. */
1076static cJSON_bool print_string(const cJSON * const item, printbuffer * const p)
1077{
1078 return print_string_ptr((unsigned char*)item->valuestring, p);
1079}
1080
1081/* Predeclare these prototypes. */
1082static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer);
1083static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer);
1084static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer);
1085static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer);
1086static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer);
1087static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer);
1088
1089/* Utility to jump whitespace and cr/lf */
1090static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
1091{
1092 if ((buffer == NULL) || (buffer->content == NULL))
1093 {
1094 return NULL;
1095 }
1096
1097 if (cannot_access_at_index(buffer, 0))
1098 {
1099 return buffer;
1100 }
1101
1102 while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32))
1103 {
1104 buffer->offset++;
1105 }
1106
1107 if (buffer->offset == buffer->length)
1108 {
1109 buffer->offset--;
1110 }
1111
1112 return buffer;
1113}
1114
1115/* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */
1116static parse_buffer *skip_utf8_bom(parse_buffer * const buffer)
1117{
1118 if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0))
1119 {
1120 return NULL;
1121 }
1122
1123 if (can_access_at_index(buffer, 4) && (strncmp((const char*)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0))
1124 {
1125 buffer->offset += 3;
1126 }
1127
1128 return buffer;
1129}
1130
1131CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
1132{
1133 size_t buffer_length;
1134
1135 if (NULL == value)
1136 {
1137 return NULL;
1138 }
1139
1140 /* Adding null character size due to require_null_terminated. */
1141 buffer_length = strlen(value) + sizeof("");
1142
1143 return cJSON_ParseWithLengthOpts(value, buffer_length, return_parse_end, require_null_terminated);
1144}
1145
1146/* Parse an object - create a new root, and populate. */
1147CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated)
1148{
1149 parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } };
1150 cJSON *item = NULL;
1151
1152 /* reset error position */
1153 global_error.json = NULL;
1154 global_error.position = 0;
1155
1156 if (value == NULL || 0 == buffer_length)
1157 {
1158 goto fail;
1159 }
1160
1161 buffer.content = (const unsigned char*)value;
1162 buffer.length = buffer_length;
1163 buffer.offset = 0;
1164 buffer.hooks = global_hooks;
1165
1166 item = cJSON_New_Item(&global_hooks);
1167 if (item == NULL) /* memory fail */
1168 {
1169 goto fail;
1170 }
1171
1172 if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer))))
1173 {
1174 /* parse failure. ep is set. */
1175 goto fail;
1176 }
1177
1178 /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
1179 if (require_null_terminated)
1180 {
1181 buffer_skip_whitespace(&buffer);
1182 if ((buffer.offset >= buffer.length) || buffer_at_offset(&buffer)[0] != '\0')
1183 {
1184 goto fail;
1185 }
1186 }
1187 if (return_parse_end)
1188 {
1189 *return_parse_end = (const char*)buffer_at_offset(&buffer);
1190 }
1191
1192 return item;
1193
1194fail:
1195 if (item != NULL)
1196 {
1197 cJSON_Delete(item);
1198 }
1199
1200 if (value != NULL)
1201 {
1202 error local_error;
1203 local_error.json = (const unsigned char*)value;
1204 local_error.position = 0;
1205
1206 if (buffer.offset < buffer.length)
1207 {
1208 local_error.position = buffer.offset;
1209 }
1210 else if (buffer.length > 0)
1211 {
1212 local_error.position = buffer.length - 1;
1213 }
1214
1215 if (return_parse_end != NULL)
1216 {
1217 *return_parse_end = (const char*)local_error.json + local_error.position;
1218 }
1219
1220 global_error = local_error;
1221 }
1222
1223 return NULL;
1224}
1225
1226/* Default options for cJSON_Parse */
1227CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value)
1228{
1229 return cJSON_ParseWithOpts(value, 0, 0);
1230}
1231
1232CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length)
1233{
1234 return cJSON_ParseWithLengthOpts(value, buffer_length, 0, 0);
1235}
1236
1237#define cjson_min(a, b) (((a) < (b)) ? (a) : (b))
1238
1239static unsigned char *print(const cJSON * const item, cJSON_bool format, const internal_hooks * const hooks)
1240{
1241 static const size_t default_buffer_size = 256;
1242 printbuffer buffer[1];
1243 unsigned char *printed = NULL;
1244
1245 memset(buffer, 0, sizeof(buffer));
1246
1247 /* create buffer */
1248 buffer->buffer = (unsigned char*) hooks->allocate(default_buffer_size);
1249 buffer->length = default_buffer_size;
1250 buffer->format = format;
1251 buffer->hooks = *hooks;
1252 if (buffer->buffer == NULL)
1253 {
1254 goto fail;
1255 }
1256
1257 /* print the value */
1258 if (!print_value(item, buffer))
1259 {
1260 goto fail;
1261 }
1262 update_offset(buffer);
1263
1264 /* check if reallocate is available */
1265 if (hooks->reallocate != NULL)
1266 {
1267 printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1);
1268 if (printed == NULL) {
1269 goto fail;
1270 }
1271 buffer->buffer = NULL;
1272 }
1273 else /* otherwise copy the JSON over to a new buffer */
1274 {
1275 printed = (unsigned char*) hooks->allocate(buffer->offset + 1);
1276 if (printed == NULL)
1277 {
1278 goto fail;
1279 }
1280 memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1));
1281 printed[buffer->offset] = '\0'; /* just to be sure */
1282
1283 /* free the buffer */
1284 hooks->deallocate(buffer->buffer);
1285 buffer->buffer = NULL;
1286 }
1287
1288 return printed;
1289
1290fail:
1291 if (buffer->buffer != NULL)
1292 {
1293 hooks->deallocate(buffer->buffer);
1294 buffer->buffer = NULL;
1295 }
1296
1297 if (printed != NULL)
1298 {
1299 hooks->deallocate(printed);
1300 printed = NULL;
1301 }
1302
1303 return NULL;
1304}
1305
1306/* Render a cJSON item/entity/structure to text. */
1307CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item)
1308{
1309 return (char*)print(item, true, &global_hooks);
1310}
1311
1312CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item)
1313{
1314 return (char*)print(item, false, &global_hooks);
1315}
1316
1317CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt)
1318{
1319 printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
1320
1321 if (prebuffer < 0)
1322 {
1323 return NULL;
1324 }
1325
1326 p.buffer = (unsigned char*)global_hooks.allocate((size_t)prebuffer);
1327 if (!p.buffer)
1328 {
1329 return NULL;
1330 }
1331
1332 p.length = (size_t)prebuffer;
1333 p.offset = 0;
1334 p.noalloc = false;
1335 p.format = fmt;
1336 p.hooks = global_hooks;
1337
1338 if (!print_value(item, &p))
1339 {
1340 global_hooks.deallocate(p.buffer);
1341 p.buffer = NULL;
1342 return NULL;
1343 }
1344
1345 return (char*)p.buffer;
1346}
1347
1348CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format)
1349{
1350 printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
1351
1352 if ((length < 0) || (buffer == NULL))
1353 {
1354 return false;
1355 }
1356
1357 p.buffer = (unsigned char*)buffer;
1358 p.length = (size_t)length;
1359 p.offset = 0;
1360 p.noalloc = true;
1361 p.format = format;
1362 p.hooks = global_hooks;
1363
1364 return print_value(item, &p);
1365}
1366
1367/* Parser core - when encountering text, process appropriately. */
1368static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer)
1369{
1370 if ((input_buffer == NULL) || (input_buffer->content == NULL))
1371 {
1372 return false; /* no input */
1373 }
1374
1375 /* parse the different types of values */
1376 /* null */
1377 if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0))
1378 {
1379 item->type = cJSON_NULL;
1380 input_buffer->offset += 4;
1381 return true;
1382 }
1383 /* false */
1384 if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0))
1385 {
1386 item->type = cJSON_False;
1387 input_buffer->offset += 5;
1388 return true;
1389 }
1390 /* true */
1391 if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "true", 4) == 0))
1392 {
1393 item->type = cJSON_True;
1394 item->valueint = 1;
1395 input_buffer->offset += 4;
1396 return true;
1397 }
1398 /* string */
1399 if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"'))
1400 {
1401 return parse_string(item, input_buffer);
1402 }
1403 /* number */
1404 if (can_access_at_index(input_buffer, 0) && ((buffer_at_offset(input_buffer)[0] == '-') || ((buffer_at_offset(input_buffer)[0] >= '0') && (buffer_at_offset(input_buffer)[0] <= '9'))))
1405 {
1406 return parse_number(item, input_buffer);
1407 }
1408 /* array */
1409 if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '['))
1410 {
1411 return parse_array(item, input_buffer);
1412 }
1413 /* object */
1414 if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{'))
1415 {
1416 return parse_object(item, input_buffer);
1417 }
1418
1419 return false;
1420}
1421
1422/* Render a value to text. */
1423static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer)
1424{
1425 unsigned char *output = NULL;
1426
1427 if ((item == NULL) || (output_buffer == NULL))
1428 {
1429 return false;
1430 }
1431
1432 switch ((item->type) & 0xFF)
1433 {
1434 case cJSON_NULL:
1435 output = ensure(output_buffer, 5);
1436 if (output == NULL)
1437 {
1438 return false;
1439 }
1440 strcpy((char*)output, "null");
1441 return true;
1442
1443 case cJSON_False:
1444 output = ensure(output_buffer, 6);
1445 if (output == NULL)
1446 {
1447 return false;
1448 }
1449 strcpy((char*)output, "false");
1450 return true;
1451
1452 case cJSON_True:
1453 output = ensure(output_buffer, 5);
1454 if (output == NULL)
1455 {
1456 return false;
1457 }
1458 strcpy((char*)output, "true");
1459 return true;
1460
1461 case cJSON_Number:
1462 return print_number(item, output_buffer);
1463
1464 case cJSON_Raw:
1465 {
1466 size_t raw_length = 0;
1467 if (item->valuestring == NULL)
1468 {
1469 return false;
1470 }
1471
1472 raw_length = strlen(item->valuestring) + sizeof("");
1473 output = ensure(output_buffer, raw_length);
1474 if (output == NULL)
1475 {
1476 return false;
1477 }
1478 memcpy(output, item->valuestring, raw_length);
1479 return true;
1480 }
1481
1482 case cJSON_String:
1483 return print_string(item, output_buffer);
1484
1485 case cJSON_Array:
1486 return print_array(item, output_buffer);
1487
1488 case cJSON_Object:
1489 return print_object(item, output_buffer);
1490
1491 default:
1492 return false;
1493 }
1494}
1495
1496/* Build an array from input text. */
1497static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer)
1498{
1499 cJSON *head = NULL; /* head of the linked list */
1500 cJSON *current_item = NULL;
1501
1502 if (input_buffer->depth >= CJSON_NESTING_LIMIT)
1503 {
1504 return false; /* to deeply nested */
1505 }
1506 input_buffer->depth++;
1507
1508 if (buffer_at_offset(input_buffer)[0] != '[')
1509 {
1510 /* not an array */
1511 goto fail;
1512 }
1513
1514 input_buffer->offset++;
1515 buffer_skip_whitespace(input_buffer);
1516 if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ']'))
1517 {
1518 /* empty array */
1519 goto success;
1520 }
1521
1522 /* check if we skipped to the end of the buffer */
1523 if (cannot_access_at_index(input_buffer, 0))
1524 {
1525 input_buffer->offset--;
1526 goto fail;
1527 }
1528
1529 /* step back to character in front of the first element */
1530 input_buffer->offset--;
1531 /* loop through the comma separated array elements */
1532 do
1533 {
1534 /* allocate next item */
1535 cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
1536 if (new_item == NULL)
1537 {
1538 goto fail; /* allocation failure */
1539 }
1540
1541 /* attach next item to list */
1542 if (head == NULL)
1543 {
1544 /* start the linked list */
1545 current_item = head = new_item;
1546 }
1547 else
1548 {
1549 /* add to the end and advance */
1550 current_item->next = new_item;
1551 new_item->prev = current_item;
1552 current_item = new_item;
1553 }
1554
1555 /* parse next value */
1556 input_buffer->offset++;
1557 buffer_skip_whitespace(input_buffer);
1558 if (!parse_value(current_item, input_buffer))
1559 {
1560 goto fail; /* failed to parse value */
1561 }
1562 buffer_skip_whitespace(input_buffer);
1563 }
1564 while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1565
1566 if (cannot_access_at_index(input_buffer, 0) || buffer_at_offset(input_buffer)[0] != ']')
1567 {
1568 goto fail; /* expected end of array */
1569 }
1570
1571success:
1572 input_buffer->depth--;
1573
1574 if (head != NULL) {
1575 head->prev = current_item;
1576 }
1577
1578 item->type = cJSON_Array;
1579 item->child = head;
1580
1581 input_buffer->offset++;
1582
1583 return true;
1584
1585fail:
1586 if (head != NULL)
1587 {
1588 cJSON_Delete(head);
1589 }
1590
1591 return false;
1592}
1593
1594/* Render an array to text */
1595static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer)
1596{
1597 unsigned char *output_pointer = NULL;
1598 size_t length = 0;
1599 cJSON *current_element = item->child;
1600
1601 if (output_buffer == NULL)
1602 {
1603 return false;
1604 }
1605
1606 if (output_buffer->depth >= CJSON_NESTING_LIMIT)
1607 {
1608 return false; /* nesting is too deep */
1609 }
1610
1611 /* Compose the output array. */
1612 /* opening square bracket */
1613 output_pointer = ensure(output_buffer, 1);
1614 if (output_pointer == NULL)
1615 {
1616 return false;
1617 }
1618
1619 *output_pointer = '[';
1620 output_buffer->offset++;
1621 output_buffer->depth++;
1622
1623 while (current_element != NULL)
1624 {
1625 if (!print_value(current_element, output_buffer))
1626 {
1627 return false;
1628 }
1629 update_offset(output_buffer);
1630 if (current_element->next)
1631 {
1632 length = (size_t) (output_buffer->format ? 2 : 1);
1633 output_pointer = ensure(output_buffer, length + 1);
1634 if (output_pointer == NULL)
1635 {
1636 return false;
1637 }
1638 *output_pointer++ = ',';
1639 if(output_buffer->format)
1640 {
1641 *output_pointer++ = ' ';
1642 }
1643 *output_pointer = '\0';
1644 output_buffer->offset += length;
1645 }
1646 current_element = current_element->next;
1647 }
1648
1649 output_pointer = ensure(output_buffer, 2);
1650 if (output_pointer == NULL)
1651 {
1652 return false;
1653 }
1654 *output_pointer++ = ']';
1655 *output_pointer = '\0';
1656 output_buffer->depth--;
1657
1658 return true;
1659}
1660
1661/* Build an object from the text. */
1662static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer)
1663{
1664 cJSON *head = NULL; /* linked list head */
1665 cJSON *current_item = NULL;
1666
1667 if (input_buffer->depth >= CJSON_NESTING_LIMIT)
1668 {
1669 return false; /* to deeply nested */
1670 }
1671 input_buffer->depth++;
1672
1673 if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '{'))
1674 {
1675 goto fail; /* not an object */
1676 }
1677
1678 input_buffer->offset++;
1679 buffer_skip_whitespace(input_buffer);
1680 if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '}'))
1681 {
1682 goto success; /* empty object */
1683 }
1684
1685 /* check if we skipped to the end of the buffer */
1686 if (cannot_access_at_index(input_buffer, 0))
1687 {
1688 input_buffer->offset--;
1689 goto fail;
1690 }
1691
1692 /* step back to character in front of the first element */
1693 input_buffer->offset--;
1694 /* loop through the comma separated array elements */
1695 do
1696 {
1697 /* allocate next item */
1698 cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
1699 if (new_item == NULL)
1700 {
1701 goto fail; /* allocation failure */
1702 }
1703
1704 /* attach next item to list */
1705 if (head == NULL)
1706 {
1707 /* start the linked list */
1708 current_item = head = new_item;
1709 }
1710 else
1711 {
1712 /* add to the end and advance */
1713 current_item->next = new_item;
1714 new_item->prev = current_item;
1715 current_item = new_item;
1716 }
1717
1718 if (cannot_access_at_index(input_buffer, 1))
1719 {
1720 goto fail; /* nothing comes after the comma */
1721 }
1722
1723 /* parse the name of the child */
1724 input_buffer->offset++;
1725 buffer_skip_whitespace(input_buffer);
1726 if (!parse_string(current_item, input_buffer))
1727 {
1728 goto fail; /* failed to parse name */
1729 }
1730 buffer_skip_whitespace(input_buffer);
1731
1732 /* swap valuestring and string, because we parsed the name */
1733 current_item->string = current_item->valuestring;
1734 current_item->valuestring = NULL;
1735
1736 if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != ':'))
1737 {
1738 goto fail; /* invalid object */
1739 }
1740
1741 /* parse the value */
1742 input_buffer->offset++;
1743 buffer_skip_whitespace(input_buffer);
1744 if (!parse_value(current_item, input_buffer))
1745 {
1746 goto fail; /* failed to parse value */
1747 }
1748 buffer_skip_whitespace(input_buffer);
1749 }
1750 while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1751
1752 if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '}'))
1753 {
1754 goto fail; /* expected end of object */
1755 }
1756
1757success:
1758 input_buffer->depth--;
1759
1760 if (head != NULL) {
1761 head->prev = current_item;
1762 }
1763
1764 item->type = cJSON_Object;
1765 item->child = head;
1766
1767 input_buffer->offset++;
1768 return true;
1769
1770fail:
1771 if (head != NULL)
1772 {
1773 cJSON_Delete(head);
1774 }
1775
1776 return false;
1777}
1778
1779/* Render an object to text. */
1780static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer)
1781{
1782 unsigned char *output_pointer = NULL;
1783 size_t length = 0;
1784 cJSON *current_item = item->child;
1785
1786 if (output_buffer == NULL)
1787 {
1788 return false;
1789 }
1790
1791 if (output_buffer->depth >= CJSON_NESTING_LIMIT)
1792 {
1793 return false; /* nesting is too deep */
1794 }
1795
1796 /* Compose the output: */
1797 length = (size_t) (output_buffer->format ? 2 : 1); /* fmt: {\n */
1798 output_pointer = ensure(output_buffer, length + 1);
1799 if (output_pointer == NULL)
1800 {
1801 return false;
1802 }
1803
1804 *output_pointer++ = '{';
1805 output_buffer->depth++;
1806 if (output_buffer->format)
1807 {
1808 *output_pointer++ = '\n';
1809 }
1810 output_buffer->offset += length;
1811
1812 while (current_item)
1813 {
1814 if (output_buffer->format)
1815 {
1816 size_t i;
1817 output_pointer = ensure(output_buffer, output_buffer->depth);
1818 if (output_pointer == NULL)
1819 {
1820 return false;
1821 }
1822 for (i = 0; i < output_buffer->depth; i++)
1823 {
1824 *output_pointer++ = '\t';
1825 }
1826 output_buffer->offset += output_buffer->depth;
1827 }
1828
1829 /* print key */
1830 if (!print_string_ptr((unsigned char*)current_item->string, output_buffer))
1831 {
1832 return false;
1833 }
1834 update_offset(output_buffer);
1835
1836 length = (size_t) (output_buffer->format ? 2 : 1);
1837 output_pointer = ensure(output_buffer, length);
1838 if (output_pointer == NULL)
1839 {
1840 return false;
1841 }
1842 *output_pointer++ = ':';
1843 if (output_buffer->format)
1844 {
1845 *output_pointer++ = '\t';
1846 }
1847 output_buffer->offset += length;
1848
1849 /* print value */
1850 if (!print_value(current_item, output_buffer))
1851 {
1852 return false;
1853 }
1854 update_offset(output_buffer);
1855
1856 /* print comma if not last */
1857 length = ((size_t)(output_buffer->format ? 1 : 0) + (size_t)(current_item->next ? 1 : 0));
1858 output_pointer = ensure(output_buffer, length + 1);
1859 if (output_pointer == NULL)
1860 {
1861 return false;
1862 }
1863 if (current_item->next)
1864 {
1865 *output_pointer++ = ',';
1866 }
1867
1868 if (output_buffer->format)
1869 {
1870 *output_pointer++ = '\n';
1871 }
1872 *output_pointer = '\0';
1873 output_buffer->offset += length;
1874
1875 current_item = current_item->next;
1876 }
1877
1878 output_pointer = ensure(output_buffer, output_buffer->format ? (output_buffer->depth + 1) : 2);
1879 if (output_pointer == NULL)
1880 {
1881 return false;
1882 }
1883 if (output_buffer->format)
1884 {
1885 size_t i;
1886 for (i = 0; i < (output_buffer->depth - 1); i++)
1887 {
1888 *output_pointer++ = '\t';
1889 }
1890 }
1891 *output_pointer++ = '}';
1892 *output_pointer = '\0';
1893 output_buffer->depth--;
1894
1895 return true;
1896}
1897
1898/* Get Array size/item / object item. */
1899CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array)
1900{
1901 cJSON *child = NULL;
1902 size_t size = 0;
1903
1904 if (array == NULL)
1905 {
1906 return 0;
1907 }
1908
1909 child = array->child;
1910
1911 while(child != NULL)
1912 {
1913 size++;
1914 child = child->next;
1915 }
1916
1917 /* FIXME: Can overflow here. Cannot be fixed without breaking the API */
1918
1919 return (int)size;
1920}
1921
1922static cJSON* get_array_item(const cJSON *array, size_t index)
1923{
1924 cJSON *current_child = NULL;
1925
1926 if (array == NULL)
1927 {
1928 return NULL;
1929 }
1930
1931 current_child = array->child;
1932 while ((current_child != NULL) && (index > 0))
1933 {
1934 index--;
1935 current_child = current_child->next;
1936 }
1937
1938 return current_child;
1939}
1940
1941CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index)
1942{
1943 if (index < 0)
1944 {
1945 return NULL;
1946 }
1947
1948 return get_array_item(array, (size_t)index);
1949}
1950
1951static cJSON *get_object_item(const cJSON * const object, const char * const name, const cJSON_bool case_sensitive)
1952{
1953 cJSON *current_element = NULL;
1954
1955 if ((object == NULL) || (name == NULL))
1956 {
1957 return NULL;
1958 }
1959
1960 current_element = object->child;
1961 if (case_sensitive)
1962 {
1963 while ((current_element != NULL) && (current_element->string != NULL) && (strcmp(name, current_element->string) != 0))
1964 {
1965 current_element = current_element->next;
1966 }
1967 }
1968 else
1969 {
1970 while ((current_element != NULL) && (case_insensitive_strcmp((const unsigned char*)name, (const unsigned char*)(current_element->string)) != 0))
1971 {
1972 current_element = current_element->next;
1973 }
1974 }
1975
1976 if ((current_element == NULL) || (current_element->string == NULL)) {
1977 return NULL;
1978 }
1979
1980 return current_element;
1981}
1982
1983CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string)
1984{
1985 return get_object_item(object, string, false);
1986}
1987
1988CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string)
1989{
1990 return get_object_item(object, string, true);
1991}
1992
1993CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string)
1994{
1995 return cJSON_GetObjectItem(object, string) ? 1 : 0;
1996}
1997
1998/* Utility for array list handling. */
1999static void suffix_object(cJSON *prev, cJSON *item)
2000{
2001 prev->next = item;
2002 item->prev = prev;
2003}
2004
2005/* Utility for handling references. */
2006static cJSON *create_reference(const cJSON *item, const internal_hooks * const hooks)
2007{
2008 cJSON *reference = NULL;
2009 if (item == NULL)
2010 {
2011 return NULL;
2012 }
2013
2014 reference = cJSON_New_Item(hooks);
2015 if (reference == NULL)
2016 {
2017 return NULL;
2018 }
2019
2020 memcpy(reference, item, sizeof(cJSON));
2021 reference->string = NULL;
2022 reference->type |= cJSON_IsReference;
2023 reference->next = reference->prev = NULL;
2024 return reference;
2025}
2026
2027static cJSON_bool add_item_to_array(cJSON *array, cJSON *item)
2028{
2029 cJSON *child = NULL;
2030
2031 if ((item == NULL) || (array == NULL) || (array == item))
2032 {
2033 return false;
2034 }
2035
2036 child = array->child;
2037 /*
2038 * To find the last item in array quickly, we use prev in array
2039 */
2040 if (child == NULL)
2041 {
2042 /* list is empty, start new one */
2043 array->child = item;
2044 item->prev = item;
2045 item->next = NULL;
2046 }
2047 else
2048 {
2049 /* append to the end */
2050 if (child->prev)
2051 {
2052 suffix_object(child->prev, item);
2053 array->child->prev = item;
2054 }
2055 }
2056
2057 return true;
2058}
2059
2060/* Add item to array/object. */
2061CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item)
2062{
2063 return add_item_to_array(array, item);
2064}
2065
2066#if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
2067 #pragma GCC diagnostic push
2068#endif
2069#ifdef __GNUC__
2070#pragma GCC diagnostic ignored "-Wcast-qual"
2071#endif
2072/* helper function to cast away const */
2073static void* cast_away_const(const void* string)
2074{
2075 return (void*)string;
2076}
2077#if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
2078 #pragma GCC diagnostic pop
2079#endif
2080
2081
2082static cJSON_bool add_item_to_object(cJSON * const object, const char * const string, cJSON * const item, const internal_hooks * const hooks, const cJSON_bool constant_key)
2083{
2084 char *new_key = NULL;
2085 int new_type = cJSON_Invalid;
2086
2087 if ((object == NULL) || (string == NULL) || (item == NULL) || (object == item))
2088 {
2089 return false;
2090 }
2091
2092 if (constant_key)
2093 {
2094 new_key = (char*)cast_away_const(string);
2095 new_type = item->type | cJSON_StringIsConst;
2096 }
2097 else
2098 {
2099 new_key = (char*)cJSON_strdup((const unsigned char*)string, hooks);
2100 if (new_key == NULL)
2101 {
2102 return false;
2103 }
2104
2105 new_type = item->type & ~cJSON_StringIsConst;
2106 }
2107
2108 if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
2109 {
2110 hooks->deallocate(item->string);
2111 }
2112
2113 item->string = new_key;
2114 item->type = new_type;
2115
2116 return add_item_to_array(object, item);
2117}
2118
2119CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item)
2120{
2121 return add_item_to_object(object, string, item, &global_hooks, false);
2122}
2123
2124/* Add an item to an object with constant string as key */
2125CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
2126{
2127 return add_item_to_object(object, string, item, &global_hooks, true);
2128}
2129
2130CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)
2131{
2132 if (array == NULL)
2133 {
2134 return false;
2135 }
2136
2137 return add_item_to_array(array, create_reference(item, &global_hooks));
2138}
2139
2140CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item)
2141{
2142 if ((object == NULL) || (string == NULL))
2143 {
2144 return false;
2145 }
2146
2147 return add_item_to_object(object, string, create_reference(item, &global_hooks), &global_hooks, false);
2148}
2149
2150CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name)
2151{
2152 cJSON *null = cJSON_CreateNull();
2153 if (add_item_to_object(object, name, null, &global_hooks, false))
2154 {
2155 return null;
2156 }
2157
2158 cJSON_Delete(null);
2159 return NULL;
2160}
2161
2162CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name)
2163{
2164 cJSON *true_item = cJSON_CreateTrue();
2165 if (add_item_to_object(object, name, true_item, &global_hooks, false))
2166 {
2167 return true_item;
2168 }
2169
2170 cJSON_Delete(true_item);
2171 return NULL;
2172}
2173
2174CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name)
2175{
2176 cJSON *false_item = cJSON_CreateFalse();
2177 if (add_item_to_object(object, name, false_item, &global_hooks, false))
2178 {
2179 return false_item;
2180 }
2181
2182 cJSON_Delete(false_item);
2183 return NULL;
2184}
2185
2186CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean)
2187{
2188 cJSON *bool_item = cJSON_CreateBool(boolean);
2189 if (add_item_to_object(object, name, bool_item, &global_hooks, false))
2190 {
2191 return bool_item;
2192 }
2193
2194 cJSON_Delete(bool_item);
2195 return NULL;
2196}
2197
2198CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number)
2199{
2200 cJSON *number_item = cJSON_CreateNumber(number);
2201 if (add_item_to_object(object, name, number_item, &global_hooks, false))
2202 {
2203 return number_item;
2204 }
2205
2206 cJSON_Delete(number_item);
2207 return NULL;
2208}
2209
2210CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string)
2211{
2212 cJSON *string_item = cJSON_CreateString(string);
2213 if (add_item_to_object(object, name, string_item, &global_hooks, false))
2214 {
2215 return string_item;
2216 }
2217
2218 cJSON_Delete(string_item);
2219 return NULL;
2220}
2221
2222CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw)
2223{
2224 cJSON *raw_item = cJSON_CreateRaw(raw);
2225 if (add_item_to_object(object, name, raw_item, &global_hooks, false))
2226 {
2227 return raw_item;
2228 }
2229
2230 cJSON_Delete(raw_item);
2231 return NULL;
2232}
2233
2234CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name)
2235{
2236 cJSON *object_item = cJSON_CreateObject();
2237 if (add_item_to_object(object, name, object_item, &global_hooks, false))
2238 {
2239 return object_item;
2240 }
2241
2242 cJSON_Delete(object_item);
2243 return NULL;
2244}
2245
2246CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name)
2247{
2248 cJSON *array = cJSON_CreateArray();
2249 if (add_item_to_object(object, name, array, &global_hooks, false))
2250 {
2251 return array;
2252 }
2253
2254 cJSON_Delete(array);
2255 return NULL;
2256}
2257
2258CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item)
2259{
2260 if ((parent == NULL) || (item == NULL) || (item != parent->child && item->prev == NULL))
2261 {
2262 return NULL;
2263 }
2264
2265 if (item != parent->child)
2266 {
2267 /* not the first element */
2268 item->prev->next = item->next;
2269 }
2270 if (item->next != NULL)
2271 {
2272 /* not the last element */
2273 item->next->prev = item->prev;
2274 }
2275
2276 if (item == parent->child)
2277 {
2278 /* first element */
2279 parent->child = item->next;
2280 }
2281 else if (item->next == NULL)
2282 {
2283 /* last element */
2284 parent->child->prev = item->prev;
2285 }
2286
2287 /* make sure the detached item doesn't point anywhere anymore */
2288 item->prev = NULL;
2289 item->next = NULL;
2290
2291 return item;
2292}
2293
2294CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
2295{
2296 if (which < 0)
2297 {
2298 return NULL;
2299 }
2300
2301 return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which));
2302}
2303
2304CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which)
2305{
2306 cJSON_Delete(cJSON_DetachItemFromArray(array, which));
2307}
2308
2309CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string)
2310{
2311 cJSON *to_detach = cJSON_GetObjectItem(object, string);
2312
2313 return cJSON_DetachItemViaPointer(object, to_detach);
2314}
2315
2316CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string)
2317{
2318 cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string);
2319
2320 return cJSON_DetachItemViaPointer(object, to_detach);
2321}
2322
2323CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string)
2324{
2325 cJSON_Delete(cJSON_DetachItemFromObject(object, string));
2326}
2327
2328CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string)
2329{
2330 cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string));
2331}
2332
2333/* Replace array/object items with new ones. */
2334CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
2335{
2336 cJSON *after_inserted = NULL;
2337
2338 if (which < 0 || newitem == NULL)
2339 {
2340 return false;
2341 }
2342
2343 after_inserted = get_array_item(array, (size_t)which);
2344 if (after_inserted == NULL)
2345 {
2346 return add_item_to_array(array, newitem);
2347 }
2348
2349 if (after_inserted != array->child && after_inserted->prev == NULL) {
2350 /* return false if after_inserted is a corrupted array item */
2351 return false;
2352 }
2353
2354 newitem->next = after_inserted;
2355 newitem->prev = after_inserted->prev;
2356 after_inserted->prev = newitem;
2357 if (after_inserted == array->child)
2358 {
2359 array->child = newitem;
2360 }
2361 else
2362 {
2363 newitem->prev->next = newitem;
2364 }
2365 return true;
2366}
2367
2368CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement)
2369{
2370 if ((parent == NULL) || (parent->child == NULL) || (replacement == NULL) || (item == NULL))
2371 {
2372 return false;
2373 }
2374
2375 if (replacement == item)
2376 {
2377 return true;
2378 }
2379
2380 replacement->next = item->next;
2381 replacement->prev = item->prev;
2382
2383 if (replacement->next != NULL)
2384 {
2385 replacement->next->prev = replacement;
2386 }
2387 if (parent->child == item)
2388 {
2389 if (parent->child->prev == parent->child)
2390 {
2391 replacement->prev = replacement;
2392 }
2393 parent->child = replacement;
2394 }
2395 else
2396 { /*
2397 * To find the last item in array quickly, we use prev in array.
2398 * We can't modify the last item's next pointer where this item was the parent's child
2399 */
2400 if (replacement->prev != NULL)
2401 {
2402 replacement->prev->next = replacement;
2403 }
2404 if (replacement->next == NULL)
2405 {
2406 parent->child->prev = replacement;
2407 }
2408 }
2409
2410 item->next = NULL;
2411 item->prev = NULL;
2412 cJSON_Delete(item);
2413
2414 return true;
2415}
2416
2417CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
2418{
2419 if (which < 0)
2420 {
2421 return false;
2422 }
2423
2424 return cJSON_ReplaceItemViaPointer(array, get_array_item(array, (size_t)which), newitem);
2425}
2426
2427static cJSON_bool replace_item_in_object(cJSON *object, const char *string, cJSON *replacement, cJSON_bool case_sensitive)
2428{
2429 if ((replacement == NULL) || (string == NULL))
2430 {
2431 return false;
2432 }
2433
2434 /* replace the name in the replacement */
2435 if (!(replacement->type & cJSON_StringIsConst) && (replacement->string != NULL))
2436 {
2437 cJSON_free(replacement->string);
2438 }
2439 replacement->string = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
2440 if (replacement->string == NULL)
2441 {
2442 return false;
2443 }
2444
2445 replacement->type &= ~cJSON_StringIsConst;
2446
2447 return cJSON_ReplaceItemViaPointer(object, get_object_item(object, string, case_sensitive), replacement);
2448}
2449
2450CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem)
2451{
2452 return replace_item_in_object(object, string, newitem, false);
2453}
2454
2455CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object, const char *string, cJSON *newitem)
2456{
2457 return replace_item_in_object(object, string, newitem, true);
2458}
2459
2460/* Create basic types: */
2461CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void)
2462{
2463 cJSON *item = cJSON_New_Item(&global_hooks);
2464 if(item)
2465 {
2466 item->type = cJSON_NULL;
2467 }
2468
2469 return item;
2470}
2471
2472CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void)
2473{
2474 cJSON *item = cJSON_New_Item(&global_hooks);
2475 if(item)
2476 {
2477 item->type = cJSON_True;
2478 }
2479
2480 return item;
2481}
2482
2483CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void)
2484{
2485 cJSON *item = cJSON_New_Item(&global_hooks);
2486 if(item)
2487 {
2488 item->type = cJSON_False;
2489 }
2490
2491 return item;
2492}
2493
2494CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean)
2495{
2496 cJSON *item = cJSON_New_Item(&global_hooks);
2497 if(item)
2498 {
2499 item->type = boolean ? cJSON_True : cJSON_False;
2500 }
2501
2502 return item;
2503}
2504
2505CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
2506{
2507 cJSON *item = cJSON_New_Item(&global_hooks);
2508 if(item)
2509 {
2510 item->type = cJSON_Number;
2511 item->valuedouble = num;
2512
2513 /* use saturation in case of overflow */
2514 if (num >= INT_MAX)
2515 {
2516 item->valueint = INT_MAX;
2517 }
2518 else if (num <= (double)INT_MIN)
2519 {
2520 item->valueint = INT_MIN;
2521 }
2522 else
2523 {
2524 item->valueint = (int)num;
2525 }
2526 }
2527
2528 return item;
2529}
2530
2531CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string)
2532{
2533 cJSON *item = cJSON_New_Item(&global_hooks);
2534 if(item)
2535 {
2536 item->type = cJSON_String;
2537 item->valuestring = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
2538 if(!item->valuestring)
2539 {
2540 cJSON_Delete(item);
2541 return NULL;
2542 }
2543 }
2544
2545 return item;
2546}
2547
2548CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string)
2549{
2550 cJSON *item = cJSON_New_Item(&global_hooks);
2551 if (item != NULL)
2552 {
2553 item->type = cJSON_String | cJSON_IsReference;
2554 item->valuestring = (char*)cast_away_const(string);
2555 }
2556
2557 return item;
2558}
2559
2560CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child)
2561{
2562 cJSON *item = cJSON_New_Item(&global_hooks);
2563 if (item != NULL) {
2564 item->type = cJSON_Object | cJSON_IsReference;
2565 item->child = (cJSON*)cast_away_const(child);
2566 }
2567
2568 return item;
2569}
2570
2571CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child) {
2572 cJSON *item = cJSON_New_Item(&global_hooks);
2573 if (item != NULL) {
2574 item->type = cJSON_Array | cJSON_IsReference;
2575 item->child = (cJSON*)cast_away_const(child);
2576 }
2577
2578 return item;
2579}
2580
2581CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw)
2582{
2583 cJSON *item = cJSON_New_Item(&global_hooks);
2584 if(item)
2585 {
2586 item->type = cJSON_Raw;
2587 item->valuestring = (char*)cJSON_strdup((const unsigned char*)raw, &global_hooks);
2588 if(!item->valuestring)
2589 {
2590 cJSON_Delete(item);
2591 return NULL;
2592 }
2593 }
2594
2595 return item;
2596}
2597
2598CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void)
2599{
2600 cJSON *item = cJSON_New_Item(&global_hooks);
2601 if(item)
2602 {
2603 item->type=cJSON_Array;
2604 }
2605
2606 return item;
2607}
2608
2609CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void)
2610{
2611 cJSON *item = cJSON_New_Item(&global_hooks);
2612 if (item)
2613 {
2614 item->type = cJSON_Object;
2615 }
2616
2617 return item;
2618}
2619
2620/* Create Arrays: */
2621CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count)
2622{
2623 size_t i = 0;
2624 cJSON *n = NULL;
2625 cJSON *p = NULL;
2626 cJSON *a = NULL;
2627
2628 if ((count < 0) || (numbers == NULL))
2629 {
2630 return NULL;
2631 }
2632
2633 a = cJSON_CreateArray();
2634
2635 for(i = 0; a && (i < (size_t)count); i++)
2636 {
2637 n = cJSON_CreateNumber(numbers[i]);
2638 if (!n)
2639 {
2640 cJSON_Delete(a);
2641 return NULL;
2642 }
2643 if(!i)
2644 {
2645 a->child = n;
2646 }
2647 else
2648 {
2649 suffix_object(p, n);
2650 }
2651 p = n;
2652 }
2653
2654 if (a && a->child) {
2655 a->child->prev = n;
2656 }
2657
2658 return a;
2659}
2660
2661CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
2662{
2663 size_t i = 0;
2664 cJSON *n = NULL;
2665 cJSON *p = NULL;
2666 cJSON *a = NULL;
2667
2668 if ((count < 0) || (numbers == NULL))
2669 {
2670 return NULL;
2671 }
2672
2673 a = cJSON_CreateArray();
2674
2675 for(i = 0; a && (i < (size_t)count); i++)
2676 {
2677 n = cJSON_CreateNumber((double)numbers[i]);
2678 if(!n)
2679 {
2680 cJSON_Delete(a);
2681 return NULL;
2682 }
2683 if(!i)
2684 {
2685 a->child = n;
2686 }
2687 else
2688 {
2689 suffix_object(p, n);
2690 }
2691 p = n;
2692 }
2693
2694 if (a && a->child) {
2695 a->child->prev = n;
2696 }
2697
2698 return a;
2699}
2700
2701CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count)
2702{
2703 size_t i = 0;
2704 cJSON *n = NULL;
2705 cJSON *p = NULL;
2706 cJSON *a = NULL;
2707
2708 if ((count < 0) || (numbers == NULL))
2709 {
2710 return NULL;
2711 }
2712
2713 a = cJSON_CreateArray();
2714
2715 for(i = 0; a && (i < (size_t)count); i++)
2716 {
2717 n = cJSON_CreateNumber(numbers[i]);
2718 if(!n)
2719 {
2720 cJSON_Delete(a);
2721 return NULL;
2722 }
2723 if(!i)
2724 {
2725 a->child = n;
2726 }
2727 else
2728 {
2729 suffix_object(p, n);
2730 }
2731 p = n;
2732 }
2733
2734 if (a && a->child) {
2735 a->child->prev = n;
2736 }
2737
2738 return a;
2739}
2740
2741CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count)
2742{
2743 size_t i = 0;
2744 cJSON *n = NULL;
2745 cJSON *p = NULL;
2746 cJSON *a = NULL;
2747
2748 if ((count < 0) || (strings == NULL))
2749 {
2750 return NULL;
2751 }
2752
2753 a = cJSON_CreateArray();
2754
2755 for (i = 0; a && (i < (size_t)count); i++)
2756 {
2757 n = cJSON_CreateString(strings[i]);
2758 if(!n)
2759 {
2760 cJSON_Delete(a);
2761 return NULL;
2762 }
2763 if(!i)
2764 {
2765 a->child = n;
2766 }
2767 else
2768 {
2769 suffix_object(p,n);
2770 }
2771 p = n;
2772 }
2773
2774 if (a && a->child) {
2775 a->child->prev = n;
2776 }
2777
2778 return a;
2779}
2780
2781/* Duplication */
2782cJSON * cJSON_Duplicate_rec(const cJSON *item, size_t depth, cJSON_bool recurse);
2783
2784CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse)
2785{
2786 return cJSON_Duplicate_rec(item, 0, recurse );
2787}
2788
2789cJSON * cJSON_Duplicate_rec(const cJSON *item, size_t depth, cJSON_bool recurse)
2790{
2791 cJSON *newitem = NULL;
2792 cJSON *child = NULL;
2793 cJSON *next = NULL;
2794 cJSON *newchild = NULL;
2795
2796 /* Bail on bad ptr */
2797 if (!item)
2798 {
2799 goto fail;
2800 }
2801 /* Create new item */
2802 newitem = cJSON_New_Item(&global_hooks);
2803 if (!newitem)
2804 {
2805 goto fail;
2806 }
2807 /* Copy over all vars */
2808 newitem->type = item->type & (~cJSON_IsReference);
2809 newitem->valueint = item->valueint;
2810 newitem->valuedouble = item->valuedouble;
2811 if (item->valuestring)
2812 {
2813 newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring, &global_hooks);
2814 if (!newitem->valuestring)
2815 {
2816 goto fail;
2817 }
2818 }
2819 if (item->string)
2820 {
2821 newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string, &global_hooks);
2822 if (!newitem->string)
2823 {
2824 goto fail;
2825 }
2826 }
2827 /* If non-recursive, then we're done! */
2828 if (!recurse)
2829 {
2830 return newitem;
2831 }
2832 /* Walk the ->next chain for the child. */
2833 child = item->child;
2834 while (child != NULL)
2835 {
2836 if(depth >= CJSON_CIRCULAR_LIMIT) {
2837 goto fail;
2838 }
2839 newchild = cJSON_Duplicate_rec(child, depth + 1, true); /* Duplicate (with recurse) each item in the ->next chain */
2840 if (!newchild)
2841 {
2842 goto fail;
2843 }
2844 if (next != NULL)
2845 {
2846 /* If newitem->child already set, then crosswire ->prev and ->next and move on */
2847 next->next = newchild;
2848 newchild->prev = next;
2849 next = newchild;
2850 }
2851 else
2852 {
2853 /* Set newitem->child and move to it */
2854 newitem->child = newchild;
2855 next = newchild;
2856 }
2857 child = child->next;
2858 }
2859 if (newitem && newitem->child)
2860 {
2861 newitem->child->prev = newchild;
2862 }
2863
2864 return newitem;
2865
2866fail:
2867 if (newitem != NULL)
2868 {
2869 cJSON_Delete(newitem);
2870 }
2871
2872 return NULL;
2873}
2874
2875static void skip_oneline_comment(char **input)
2876{
2877 *input += static_strlen("//");
2878
2879 for (; (*input)[0] != '\0'; ++(*input))
2880 {
2881 if ((*input)[0] == '\n') {
2882 *input += static_strlen("\n");
2883 return;
2884 }
2885 }
2886}
2887
2888static void skip_multiline_comment(char **input)
2889{
2890 *input += static_strlen("/*");
2891
2892 for (; (*input)[0] != '\0'; ++(*input))
2893 {
2894 if (((*input)[0] == '*') && ((*input)[1] == '/'))
2895 {
2896 *input += static_strlen("*/");
2897 return;
2898 }
2899 }
2900}
2901
2902static void minify_string(char **input, char **output) {
2903 (*output)[0] = (*input)[0];
2904 *input += static_strlen("\"");
2905 *output += static_strlen("\"");
2906
2907
2908 for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) {
2909 (*output)[0] = (*input)[0];
2910
2911 if ((*input)[0] == '\"') {
2912 (*output)[0] = '\"';
2913 *input += static_strlen("\"");
2914 *output += static_strlen("\"");
2915 return;
2916 } else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) {
2917 (*output)[1] = (*input)[1];
2918 *input += static_strlen("\"");
2919 *output += static_strlen("\"");
2920 }
2921 }
2922}
2923
2924CJSON_PUBLIC(void) cJSON_Minify(char *json)
2925{
2926 char *into = json;
2927
2928 if (json == NULL)
2929 {
2930 return;
2931 }
2932
2933 while (json[0] != '\0')
2934 {
2935 switch (json[0])
2936 {
2937 case ' ':
2938 case '\t':
2939 case '\r':
2940 case '\n':
2941 json++;
2942 break;
2943
2944 case '/':
2945 if (json[1] == '/')
2946 {
2947 skip_oneline_comment(&json);
2948 }
2949 else if (json[1] == '*')
2950 {
2951 skip_multiline_comment(&json);
2952 } else {
2953 json++;
2954 }
2955 break;
2956
2957 case '\"':
2958 minify_string(&json, (char**)&into);
2959 break;
2960
2961 default:
2962 into[0] = json[0];
2963 json++;
2964 into++;
2965 }
2966 }
2967
2968 /* and null-terminate. */
2969 *into = '\0';
2970}
2971
2972CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item)
2973{
2974 if (item == NULL)
2975 {
2976 return false;
2977 }
2978
2979 return (item->type & 0xFF) == cJSON_Invalid;
2980}
2981
2982CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item)
2983{
2984 if (item == NULL)
2985 {
2986 return false;
2987 }
2988
2989 return (item->type & 0xFF) == cJSON_False;
2990}
2991
2992CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item)
2993{
2994 if (item == NULL)
2995 {
2996 return false;
2997 }
2998
2999 return (item->type & 0xff) == cJSON_True;
3000}
3001
3002
3003CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item)
3004{
3005 if (item == NULL)
3006 {
3007 return false;
3008 }
3009
3010 return (item->type & (cJSON_True | cJSON_False)) != 0;
3011}
3012CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item)
3013{
3014 if (item == NULL)
3015 {
3016 return false;
3017 }
3018
3019 return (item->type & 0xFF) == cJSON_NULL;
3020}
3021
3022CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item)
3023{
3024 if (item == NULL)
3025 {
3026 return false;
3027 }
3028
3029 return (item->type & 0xFF) == cJSON_Number;
3030}
3031
3032CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item)
3033{
3034 if (item == NULL)
3035 {
3036 return false;
3037 }
3038
3039 return (item->type & 0xFF) == cJSON_String;
3040}
3041
3042CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item)
3043{
3044 if (item == NULL)
3045 {
3046 return false;
3047 }
3048
3049 return (item->type & 0xFF) == cJSON_Array;
3050}
3051
3052CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item)
3053{
3054 if (item == NULL)
3055 {
3056 return false;
3057 }
3058
3059 return (item->type & 0xFF) == cJSON_Object;
3060}
3061
3062CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item)
3063{
3064 if (item == NULL)
3065 {
3066 return false;
3067 }
3068
3069 return (item->type & 0xFF) == cJSON_Raw;
3070}
3071
3072CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive)
3073{
3074 if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF)))
3075 {
3076 return false;
3077 }
3078
3079 /* check if type is valid */
3080 switch (a->type & 0xFF)
3081 {
3082 case cJSON_False:
3083 case cJSON_True:
3084 case cJSON_NULL:
3085 case cJSON_Number:
3086 case cJSON_String:
3087 case cJSON_Raw:
3088 case cJSON_Array:
3089 case cJSON_Object:
3090 break;
3091
3092 default:
3093 return false;
3094 }
3095
3096 /* identical objects are equal */
3097 if (a == b)
3098 {
3099 return true;
3100 }
3101
3102 switch (a->type & 0xFF)
3103 {
3104 /* in these cases and equal type is enough */
3105 case cJSON_False:
3106 case cJSON_True:
3107 case cJSON_NULL:
3108 return true;
3109
3110 case cJSON_Number:
3111 if (compare_double(a->valuedouble, b->valuedouble))
3112 {
3113 return true;
3114 }
3115 return false;
3116
3117 case cJSON_String:
3118 case cJSON_Raw:
3119 if ((a->valuestring == NULL) || (b->valuestring == NULL))
3120 {
3121 return false;
3122 }
3123 if (strcmp(a->valuestring, b->valuestring) == 0)
3124 {
3125 return true;
3126 }
3127
3128 return false;
3129
3130 case cJSON_Array:
3131 {
3132 cJSON *a_element = a->child;
3133 cJSON *b_element = b->child;
3134
3135 for (; (a_element != NULL) && (b_element != NULL);)
3136 {
3137 if (!cJSON_Compare(a_element, b_element, case_sensitive))
3138 {
3139 return false;
3140 }
3141
3142 a_element = a_element->next;
3143 b_element = b_element->next;
3144 }
3145
3146 /* one of the arrays is longer than the other */
3147 if (a_element != b_element) {
3148 return false;
3149 }
3150
3151 return true;
3152 }
3153
3154 case cJSON_Object:
3155 {
3156 cJSON *a_element = NULL;
3157 cJSON *b_element = NULL;
3158 cJSON_ArrayForEach(a_element, a)
3159 {
3160 /* TODO This has O(n^2) runtime, which is horrible! */
3161 b_element = get_object_item(b, a_element->string, case_sensitive);
3162 if (b_element == NULL)
3163 {
3164 return false;
3165 }
3166
3167 if (!cJSON_Compare(a_element, b_element, case_sensitive))
3168 {
3169 return false;
3170 }
3171 }
3172
3173 /* doing this twice, once on a and b to prevent true comparison if a subset of b
3174 * TODO: Do this the proper way, this is just a fix for now */
3175 cJSON_ArrayForEach(b_element, b)
3176 {
3177 a_element = get_object_item(a, b_element->string, case_sensitive);
3178 if (a_element == NULL)
3179 {
3180 return false;
3181 }
3182
3183 if (!cJSON_Compare(b_element, a_element, case_sensitive))
3184 {
3185 return false;
3186 }
3187 }
3188
3189 return true;
3190 }
3191
3192 default:
3193 return false;
3194 }
3195}
3196
3197CJSON_PUBLIC(void *) cJSON_malloc(size_t size)
3198{
3199 return global_hooks.allocate(size);
3200}
3201
3202CJSON_PUBLIC(void) cJSON_free(void *object)
3203{
3204 global_hooks.deallocate(object);
3205 object = NULL;
3206}