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: #ifdef HAVE_STDINT_H
48: #include <stdint.h>
49: #endif
50: #include <sys/types.h>
51:
52: #ifdef ENABLE_LOCALES
53: #include <locale.h>
54: #endif
55:
56: #if defined(_MSC_VER)
57: #pragma warning (pop)
58: #endif
59: #ifdef __GNUC__
60: #pragma GCC visibility pop
61: #endif
62:
63: #include "cjson.h"
64:
65: /* define our own boolean type */
66: #ifdef true
67: #undef true
68: #endif
69: #define true ((cJSON_bool)1)
70:
71: #ifdef false
72: #undef false
73: #endif
74: #define false ((cJSON_bool)0)
75:
76: /* define isnan and isinf for ANSI C, if in C99 or above, isnan and isinf has been defined in math.h */
77: #ifndef isinf
78: #define isinf(d) (isnan((d - d)) && !isnan(d))
79: #endif
80: #ifndef isnan
81: #define isnan(d) (d != d)
82: #endif
83:
84: #ifndef NAN
85: #define NAN 0.0/0.0
86: #endif
87:
88: typedef struct {
89: const unsigned char *json;
90: size_t position;
91: } error;
92: static error global_error = { NULL, 0 };
93:
94: #ifndef LLONG_MAX
95: #define LLONG_MAX 9223372036854775807LL
96: #endif
97: #ifndef LLONG_MIN
98: #define LLONG_MIN (-LLONG_MAX - 1LL)
99: #endif
100:
101: CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
102: {
103: return (const char*) (global_error.json + global_error.position);
104: }
105:
106: CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item)
107: {
108: if (!cJSON_IsString(item))
109: {
110: return NULL;
111: }
112:
113: return item->valuestring;
114: }
115:
116: CJSON_PUBLIC(double) cJSON_GetNumberValue(cJSON *item)
117: {
118: if (!cJSON_IsNumber(item))
119: {
120: return NAN;
121: }
122:
123: return item->valuedouble;
124: }
125:
126: /* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
127: #if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 13)
128: #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
129: #endif
130:
131: CJSON_PUBLIC(const char*) cJSON_Version(void)
132: {
133: static char version[15];
134: sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
135:
136: return version;
137: }
138:
139: /* Case insensitive string comparison, doesn't consider two NULL pointers equal though */
140: static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2)
141: {
142: if ((string1 == NULL) || (string2 == NULL))
143: {
144: return 1;
145: }
146:
147: if (string1 == string2)
148: {
149: return 0;
150: }
151:
152: for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++)
153: {
154: if (*string1 == '\0')
155: {
156: return 0;
157: }
158: }
159:
160: return tolower(*string1) - tolower(*string2);
161: }
162:
163: typedef struct internal_hooks
164: {
165: void *(CJSON_CDECL *allocate)(size_t size);
166: void (CJSON_CDECL *deallocate)(void *pointer);
167: void *(CJSON_CDECL *reallocate)(void *pointer, size_t size);
168: } internal_hooks;
169:
170: #if defined(_MSC_VER)
171: /* work around MSVC error C2322: '...' address of dllimport '...' is not static */
172: static void * CJSON_CDECL internal_malloc(size_t size)
173: {
174: return malloc(size);
175: }
176: static void CJSON_CDECL internal_free(void *pointer)
177: {
178: free(pointer);
179: }
180: static void * CJSON_CDECL internal_realloc(void *pointer, size_t size)
181: {
182: return realloc(pointer, size);
183: }
184: #else
185: #define internal_malloc malloc
186: #define internal_free free
187: #define internal_realloc realloc
188: #endif
189:
190: /* strlen of character literals resolved at compile time */
191: #define static_strlen(string_literal) (sizeof(string_literal) - sizeof(""))
192:
193: static internal_hooks global_hooks = { internal_malloc, internal_free, internal_realloc };
194:
195: static unsigned char* cJSON_strdup(const unsigned char* string, const internal_hooks * const hooks)
196: {
197: size_t length = 0;
198: unsigned char *copy = NULL;
199:
200: if (string == NULL)
201: {
202: return NULL;
203: }
204:
205: length = strlen((const char*)string) + sizeof("");
206: copy = (unsigned char*)hooks->allocate(length);
207: if (copy == NULL)
208: {
209: return NULL;
210: }
211: memcpy(copy, string, length);
212:
213: return copy;
214: }
215:
216: CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks)
217: {
218: if (hooks == NULL)
219: {
220: /* Reset hooks */
221: global_hooks.allocate = malloc;
222: global_hooks.deallocate = free;
223: global_hooks.reallocate = realloc;
224: return;
225: }
226:
227: global_hooks.allocate = malloc;
228: if (hooks->malloc_fn != NULL)
229: {
230: global_hooks.allocate = hooks->malloc_fn;
231: }
232:
233: global_hooks.deallocate = free;
234: if (hooks->free_fn != NULL)
235: {
236: global_hooks.deallocate = hooks->free_fn;
237: }
238:
239: /* use realloc only if both free and malloc are used */
240: global_hooks.reallocate = NULL;
241: if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free))
242: {
243: global_hooks.reallocate = realloc;
244: }
245: }
246:
247: /* Internal constructor. */
248: static cJSON *cJSON_New_Item(const internal_hooks * const hooks)
249: {
250: cJSON* node = (cJSON*)hooks->allocate(sizeof(cJSON));
251: if (node)
252: {
253: memset(node, '\0', sizeof(cJSON));
254: }
255:
256: return node;
257: }
258:
259: /* Delete a cJSON structure. */
260: CJSON_PUBLIC(void) cJSON_Delete(cJSON *item)
261: {
262: cJSON *next = NULL;
263: while (item != NULL)
264: {
265: next = item->next;
266: if (!(item->type & cJSON_IsReference) && (item->child != NULL))
267: {
268: cJSON_Delete(item->child);
269: }
270: if (!(item->type & cJSON_IsReference) && (item->valuestring != NULL))
271: {
272: global_hooks.deallocate(item->valuestring);
273: }
274: if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
275: {
276: global_hooks.deallocate(item->string);
277: }
278: global_hooks.deallocate(item);
279: item = next;
280: }
281: }
282:
283: /* get the decimal point character of the current locale */
284: static unsigned char get_decimal_point(void)
285: {
286: #ifdef ENABLE_LOCALES
287: struct lconv *lconv = localeconv();
288: return (unsigned char) lconv->decimal_point[0];
289: #else
290: return '.';
291: #endif
292: }
293:
294: typedef struct
295: {
296: const unsigned char *content;
297: size_t length;
298: size_t offset;
299: size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */
300: internal_hooks hooks;
301: } parse_buffer;
302:
303: /* check if the given size is left to read in a given parse buffer (starting with 1) */
304: #define can_read(buffer, size) ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length))
305: /* check if the buffer can be accessed at the given index (starting with 0) */
306: #define can_access_at_index(buffer, index) ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length))
307: #define cannot_access_at_index(buffer, index) (!can_access_at_index(buffer, index))
308: /* get a pointer to the buffer at the position */
309: #define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset)
310:
311: /* Parse the input text to generate a number, and populate the result into item. */
312: static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
313: {
314: double number = 0;
315: unsigned char *after_end = NULL;
316: unsigned char number_c_string[64];
317: unsigned char decimal_point = get_decimal_point();
318: size_t i = 0;
319:
320: if ((input_buffer == NULL) || (input_buffer->content == NULL))
321: {
322: return false;
323: }
324:
325: /* copy the number into a temporary buffer and replace '.' with the decimal point
326: * of the current locale (for strtod)
327: * This also takes care of '\0' not necessarily being available for marking the end of the input */
328: for (i = 0; (i < (sizeof(number_c_string) - 1)) && can_access_at_index(input_buffer, i); i++)
329: {
330: switch (buffer_at_offset(input_buffer)[i])
331: {
332: case '0':
333: case '1':
334: case '2':
335: case '3':
336: case '4':
337: case '5':
338: case '6':
339: case '7':
340: case '8':
341: case '9':
342: case '+':
343: case '-':
344: case 'e':
345: case 'E':
346: number_c_string[i] = buffer_at_offset(input_buffer)[i];
347: break;
348:
349: case '.':
350: number_c_string[i] = decimal_point;
351: break;
352:
353: default:
354: goto loop_end;
355: }
356: }
357: loop_end:
358: number_c_string[i] = '\0';
359:
360: number = strtod((const char*)number_c_string, (char**)&after_end);
361: if (number_c_string == after_end)
362: {
363: return false; /* parse_error */
364: }
365:
366: item->valuedouble = number;
367:
368: /* use saturation in case of overflow */
369: if (number >= LLONG_MAX)
370: {
371: item->valueint = LLONG_MAX;
372: }
373: else if (number <= (double)LLONG_MIN)
374: {
375: item->valueint = LLONG_MIN;
376: }
377: else
378: {
379: item->valueint = (int64_t)number;
380: }
381:
382: item->type = cJSON_Number;
383:
384: input_buffer->offset += (size_t)(after_end - number_c_string);
385: return true;
386: }
387:
388: /* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
389: CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number)
390: {
391: if (number >= LLONG_MAX)
392: {
393: object->valueint = LLONG_MAX;
394: }
395: else if (number <= (double)LLONG_MIN)
396: {
397: object->valueint = LLONG_MIN;
398: }
399: else
400: {
401: object->valueint = (int64_t)number;
402: }
403:
404: return object->valuedouble = number;
405: }
406:
407: CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring)
408: {
409: char *copy = NULL;
410: /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */
411: if (!(object->type & cJSON_String) || (object->type & cJSON_IsReference))
412: {
413: return NULL;
414: }
415: if (strlen(valuestring) <= strlen(object->valuestring))
416: {
417: strcpy(object->valuestring, valuestring);
418: return object->valuestring;
419: }
420: copy = (char*) cJSON_strdup((const unsigned char*)valuestring, &global_hooks);
421: if (copy == NULL)
422: {
423: return NULL;
424: }
425: if (object->valuestring != NULL)
426: {
427: cJSON_free(object->valuestring);
428: }
429: object->valuestring = copy;
430:
431: return copy;
432: }
433:
434: typedef struct
435: {
436: unsigned char *buffer;
437: size_t length;
438: size_t offset;
439: size_t depth; /* current nesting depth (for formatted printing) */
440: cJSON_bool noalloc;
441: cJSON_bool format; /* is this print a formatted print */
442: internal_hooks hooks;
443: } printbuffer;
444:
445: /* realloc printbuffer if necessary to have at least "needed" bytes more */
446: static unsigned char* ensure(printbuffer * const p, size_t needed)
447: {
448: unsigned char *newbuffer = NULL;
449: size_t newsize = 0;
450:
451: if ((p == NULL) || (p->buffer == NULL))
452: {
453: return NULL;
454: }
455:
456: if ((p->length > 0) && (p->offset >= p->length))
457: {
458: /* make sure that offset is valid */
459: return NULL;
460: }
461:
462: if (needed > SIZE_MAX)
463: {
464: /* sizes bigger than SIZE_MAX are currently not supported */
465: return NULL;
466: }
467:
468: needed += p->offset + 1;
469: if (needed <= p->length)
470: {
471: return p->buffer + p->offset;
472: }
473:
474: if (p->noalloc) {
475: return NULL;
476: }
477:
478: /* calculate new buffer size */
479: if (needed > (SIZE_MAX / 2))
480: {
481: /* overflow of int, use SIZE_MAX if possible */
482: if (needed <= SIZE_MAX)
483: {
484: newsize = SIZE_MAX;
485: }
486: else
487: {
488: return NULL;
489: }
490: }
491: else
492: {
493: newsize = needed * 2;
494: }
495:
496: if (p->hooks.reallocate != NULL)
497: {
498: /* reallocate with realloc if available */
499: newbuffer = (unsigned char*)p->hooks.reallocate(p->buffer, newsize);
500: if (newbuffer == NULL)
501: {
502: p->hooks.deallocate(p->buffer);
503: p->length = 0;
504: p->buffer = NULL;
505:
506: return NULL;
507: }
508: }
509: else
510: {
511: /* otherwise reallocate manually */
512: newbuffer = (unsigned char*)p->hooks.allocate(newsize);
513: if (!newbuffer)
514: {
515: p->hooks.deallocate(p->buffer);
516: p->length = 0;
517: p->buffer = NULL;
518:
519: return NULL;
520: }
521: if (newbuffer)
522: {
523: memcpy(newbuffer, p->buffer, p->offset + 1);
524: }
525: p->hooks.deallocate(p->buffer);
526: }
527: p->length = newsize;
528: p->buffer = newbuffer;
529:
530: return newbuffer + p->offset;
531: }
532:
533: /* calculate the new length of the string in a printbuffer and update the offset */
534: static void update_offset(printbuffer * const buffer)
535: {
536: const unsigned char *buffer_pointer = NULL;
537: if ((buffer == NULL) || (buffer->buffer == NULL))
538: {
539: return;
540: }
541: buffer_pointer = buffer->buffer + buffer->offset;
542:
543: buffer->offset += strlen((const char*)buffer_pointer);
544: }
545:
546: /* securely comparison of floating-point variables */
547: static cJSON_bool compare_double(double a, double b)
548: {
549: double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b);
550: return (fabs(a - b) <= maxVal * DBL_EPSILON);
551: }
552:
553: /* Render the number nicely from the given item into a string. */
554: static cJSON_bool print_number(const cJSON * const item, printbuffer * const output_buffer)
555: {
556: unsigned char *output_pointer = NULL;
557: double d = item->valuedouble;
558: int length = 0;
559: size_t i = 0;
560: unsigned char number_buffer[26] = {0}; /* temporary buffer to print the number into */
561: unsigned char decimal_point = get_decimal_point();
562: double test = 0.0;
563:
564: if (output_buffer == NULL)
565: {
566: return false;
567: }
568:
569: /* This checks for NaN and Infinity */
570: if (isnan(d) || isinf(d))
571: {
572: length = sprintf((char*)number_buffer, "null");
573: }
574: else
575: {
576: /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */
577: length = sprintf((char*)number_buffer, "%1.15g", d);
578:
579: /* Check whether the original double can be recovered */
580: if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || !compare_double((double)test, d))
581: {
582: /* If not, print with 17 decimal places of precision */
583: length = sprintf((char*)number_buffer, "%1.17g", d);
584: }
585: }
586:
587: /* sprintf failed or buffer overrun occurred */
588: if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1)))
589: {
590: return false;
591: }
592:
593: /* reserve appropriate space in the output */
594: output_pointer = ensure(output_buffer, (size_t)length + sizeof(""));
595: if (output_pointer == NULL)
596: {
597: return false;
598: }
599:
600: /* copy the printed number to the output and replace locale
601: * dependent decimal point with '.' */
602: for (i = 0; i < ((size_t)length); i++)
603: {
604: if (number_buffer[i] == decimal_point)
605: {
606: output_pointer[i] = '.';
607: continue;
608: }
609:
610: output_pointer[i] = number_buffer[i];
611: }
612: output_pointer[i] = '\0';
613:
614: output_buffer->offset += (size_t)length;
615:
616: return true;
617: }
618:
619: /* parse 4 digit hexadecimal number */
620: static unsigned parse_hex4(const unsigned char * const input)
621: {
622: unsigned int h = 0;
623: size_t i = 0;
624:
625: for (i = 0; i < 4; i++)
626: {
627: /* parse digit */
628: if ((input[i] >= '0') && (input[i] <= '9'))
629: {
630: h += (unsigned int) input[i] - '0';
631: }
632: else if ((input[i] >= 'A') && (input[i] <= 'F'))
633: {
634: h += (unsigned int) 10 + input[i] - 'A';
635: }
636: else if ((input[i] >= 'a') && (input[i] <= 'f'))
637: {
638: h += (unsigned int) 10 + input[i] - 'a';
639: }
640: else /* invalid */
641: {
642: return 0;
643: }
644:
645: if (i < 3)
646: {
647: /* shift left to make place for the next nibble */
648: h = h << 4;
649: }
650: }
651:
652: return h;
653: }
654:
655: /* converts a UTF-16 literal to UTF-8
656: * A literal can be one or two sequences of the form \uXXXX */
657: static unsigned char utf16_literal_to_utf8(const unsigned char * const input_pointer, const unsigned char * const input_end, unsigned char **output_pointer)
658: {
659: long unsigned int codepoint = 0;
660: unsigned int first_code = 0;
661: const unsigned char *first_sequence = input_pointer;
662: unsigned char utf8_length = 0;
663: unsigned char utf8_position = 0;
664: unsigned char sequence_length = 0;
665: unsigned char first_byte_mark = 0;
666:
667: if ((input_end - first_sequence) < 6)
668: {
669: /* input ends unexpectedly */
670: goto fail;
671: }
672:
673: /* get the first utf16 sequence */
674: first_code = parse_hex4(first_sequence + 2);
675:
676: /* check that the code is valid */
677: if (((first_code >= 0xDC00) && (first_code <= 0xDFFF)))
678: {
679: goto fail;
680: }
681:
682: /* UTF16 surrogate pair */
683: if ((first_code >= 0xD800) && (first_code <= 0xDBFF))
684: {
685: const unsigned char *second_sequence = first_sequence + 6;
686: unsigned int second_code = 0;
687: sequence_length = 12; /* \uXXXX\uXXXX */
688:
689: if ((input_end - second_sequence) < 6)
690: {
691: /* input ends unexpectedly */
692: goto fail;
693: }
694:
695: if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u'))
696: {
697: /* missing second half of the surrogate pair */
698: goto fail;
699: }
700:
701: /* get the second utf16 sequence */
702: second_code = parse_hex4(second_sequence + 2);
703: /* check that the code is valid */
704: if ((second_code < 0xDC00) || (second_code > 0xDFFF))
705: {
706: /* invalid second half of the surrogate pair */
707: goto fail;
708: }
709:
710:
711: /* calculate the unicode codepoint from the surrogate pair */
712: codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF));
713: }
714: else
715: {
716: sequence_length = 6; /* \uXXXX */
717: codepoint = first_code;
718: }
719:
720: /* encode as UTF-8
721: * takes at maximum 4 bytes to encode:
722: * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
723: if (codepoint < 0x80)
724: {
725: /* normal ascii, encoding 0xxxxxxx */
726: utf8_length = 1;
727: }
728: else if (codepoint < 0x800)
729: {
730: /* two bytes, encoding 110xxxxx 10xxxxxx */
731: utf8_length = 2;
732: first_byte_mark = 0xC0; /* 11000000 */
733: }
734: else if (codepoint < 0x10000)
735: {
736: /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
737: utf8_length = 3;
738: first_byte_mark = 0xE0; /* 11100000 */
739: }
740: else if (codepoint <= 0x10FFFF)
741: {
742: /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */
743: utf8_length = 4;
744: first_byte_mark = 0xF0; /* 11110000 */
745: }
746: else
747: {
748: /* invalid unicode codepoint */
749: goto fail;
750: }
751:
752: /* encode as utf8 */
753: for (utf8_position = (unsigned char)(utf8_length - 1); utf8_position > 0; utf8_position--)
754: {
755: /* 10xxxxxx */
756: (*output_pointer)[utf8_position] = (unsigned char)((codepoint | 0x80) & 0xBF);
757: codepoint >>= 6;
758: }
759: /* encode first byte */
760: if (utf8_length > 1)
761: {
762: (*output_pointer)[0] = (unsigned char)((codepoint | first_byte_mark) & 0xFF);
763: }
764: else
765: {
766: (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F);
767: }
768:
769: *output_pointer += utf8_length;
770:
771: return sequence_length;
772:
773: fail:
774: return 0;
775: }
776:
777: /* Parse the input text into an unescaped cinput, and populate item. */
778: static cJSON_bool parse_string(cJSON * const item, parse_buffer * const input_buffer)
779: {
780: const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1;
781: const unsigned char *input_end = buffer_at_offset(input_buffer) + 1;
782: unsigned char *output_pointer = NULL;
783: unsigned char *output = NULL;
784:
785: /* not a string */
786: if (buffer_at_offset(input_buffer)[0] != '\"')
787: {
788: goto fail;
789: }
790:
791: {
792: /* calculate approximate size of the output (overestimate) */
793: size_t allocation_length = 0;
794: size_t skipped_bytes = 0;
795: while (((size_t)(input_end - input_buffer->content) < input_buffer->length) && (*input_end != '\"'))
796: {
797: /* is escape sequence */
798: if (input_end[0] == '\\')
799: {
800: if ((size_t)(input_end + 1 - input_buffer->content) >= input_buffer->length)
801: {
802: /* prevent buffer overflow when last input character is a backslash */
803: goto fail;
804: }
805: skipped_bytes++;
806: input_end++;
807: }
808: input_end++;
809: }
810: if (((size_t)(input_end - input_buffer->content) >= input_buffer->length) || (*input_end != '\"'))
811: {
812: goto fail; /* string ended unexpectedly */
813: }
814:
815: /* This is at most how much we need for the output */
816: allocation_length = (size_t) (input_end - buffer_at_offset(input_buffer)) - skipped_bytes;
817: output = (unsigned char*)input_buffer->hooks.allocate(allocation_length + sizeof(""));
818: if (output == NULL)
819: {
820: goto fail; /* allocation failure */
821: }
822: }
823:
824: output_pointer = output;
825: /* loop through the string literal */
826: while (input_pointer < input_end)
827: {
828: if (*input_pointer != '\\')
829: {
830: *output_pointer++ = *input_pointer++;
831: }
832: /* escape sequence */
833: else
834: {
835: unsigned char sequence_length = 2;
836: if ((input_end - input_pointer) < 1)
837: {
838: goto fail;
839: }
840:
841: switch (input_pointer[1])
842: {
843: case 'b':
844: *output_pointer++ = '\b';
845: break;
846: case 'f':
847: *output_pointer++ = '\f';
848: break;
849: case 'n':
850: *output_pointer++ = '\n';
851: break;
852: case 'r':
853: *output_pointer++ = '\r';
854: break;
855: case 't':
856: *output_pointer++ = '\t';
857: break;
858: case '\"':
859: case '\\':
860: case '/':
861: *output_pointer++ = input_pointer[1];
862: break;
863:
864: /* UTF-16 literal */
865: case 'u':
866: sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer);
867: if (sequence_length == 0)
868: {
869: /* failed to convert UTF16-literal to UTF-8 */
870: goto fail;
871: }
872: break;
873:
874: default:
875: goto fail;
876: }
877: input_pointer += sequence_length;
878: }
879: }
880:
881: /* zero terminate the output */
882: *output_pointer = '\0';
883:
884: item->type = cJSON_String;
885: item->valuestring = (char*)output;
886:
887: input_buffer->offset = (size_t) (input_end - input_buffer->content);
888: input_buffer->offset++;
889:
890: return true;
891:
892: fail:
893: if (output != NULL)
894: {
895: input_buffer->hooks.deallocate(output);
896: }
897:
898: if (input_pointer != NULL)
899: {
900: input_buffer->offset = (size_t)(input_pointer - input_buffer->content);
901: }
902:
903: return false;
904: }
905:
906: /* Render the cstring provided to an escaped version that can be printed. */
907: static cJSON_bool print_string_ptr(const unsigned char * const input, printbuffer * const output_buffer)
908: {
909: const unsigned char *input_pointer = NULL;
910: unsigned char *output = NULL;
911: unsigned char *output_pointer = NULL;
912: size_t output_length = 0;
913: /* numbers of additional characters needed for escaping */
914: size_t escape_characters = 0;
915:
916: if (output_buffer == NULL)
917: {
918: return false;
919: }
920:
921: /* empty string */
922: if (input == NULL)
923: {
924: output = ensure(output_buffer, sizeof("\"\""));
925: if (output == NULL)
926: {
927: return false;
928: }
929: strcpy((char*)output, "\"\"");
930:
931: return true;
932: }
933:
934: /* set "flag" to 1 if something needs to be escaped */
935: for (input_pointer = input; *input_pointer; input_pointer++)
936: {
937: switch (*input_pointer)
938: {
939: case '\"':
940: case '\\':
941: case '\b':
942: case '\f':
943: case '\n':
944: case '\r':
945: case '\t':
946: /* one character escape sequence */
947: escape_characters++;
948: break;
949: default:
950: if (*input_pointer < 32)
951: {
952: /* UTF-16 escape sequence uXXXX */
953: escape_characters += 5;
954: }
955: break;
956: }
957: }
958: output_length = (size_t)(input_pointer - input) + escape_characters;
959:
960: output = ensure(output_buffer, output_length + sizeof("\"\""));
961: if (output == NULL)
962: {
963: return false;
964: }
965:
966: /* no characters have to be escaped */
967: if (escape_characters == 0)
968: {
969: output[0] = '\"';
970: memcpy(output + 1, input, output_length);
971: output[output_length + 1] = '\"';
972: output[output_length + 2] = '\0';
973:
974: return true;
975: }
976:
977: output[0] = '\"';
978: output_pointer = output + 1;
979: /* copy the string */
980: for (input_pointer = input; *input_pointer != '\0'; (void)input_pointer++, output_pointer++)
981: {
982: if ((*input_pointer > 31) && (*input_pointer != '\"') && (*input_pointer != '\\'))
983: {
984: /* normal character, copy */
985: *output_pointer = *input_pointer;
986: }
987: else
988: {
989: /* character needs to be escaped */
990: *output_pointer++ = '\\';
991: switch (*input_pointer)
992: {
993: case '\\':
994: *output_pointer = '\\';
995: break;
996: case '\"':
997: *output_pointer = '\"';
998: break;
999: case '\b':
1000: *output_pointer = 'b';
1001: break;
1002: case '\f':
1003: *output_pointer = 'f';
1004: break;
1005: case '\n':
1006: *output_pointer = 'n';
1007: break;
1008: case '\r':
1009: *output_pointer = 'r';
1010: break;
1011: case '\t':
1012: *output_pointer = 't';
1013: break;
1014: default:
1015: /* escape and print as unicode codepoint */
1016: sprintf((char*)output_pointer, "u%04x", *input_pointer);
1017: output_pointer += 4;
1018: break;
1019: }
1020: }
1021: }
1022: output[output_length + 1] = '\"';
1023: output[output_length + 2] = '\0';
1024:
1025: return true;
1026: }
1027:
1028: /* Invoke print_string_ptr (which is useful) on an item. */
1029: static cJSON_bool print_string(const cJSON * const item, printbuffer * const p)
1030: {
1031: return print_string_ptr((unsigned char*)item->valuestring, p);
1032: }
1033:
1034: /* Predeclare these prototypes. */
1035: static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer);
1036: static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer);
1037: static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer);
1038: static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer);
1039: static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer);
1040: static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer);
1041:
1042: /* Utility to jump whitespace and cr/lf */
1043: static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
1044: {
1045: if ((buffer == NULL) || (buffer->content == NULL))
1046: {
1047: return NULL;
1048: }
1049:
1050: if (cannot_access_at_index(buffer, 0))
1051: {
1052: return buffer;
1053: }
1054:
1055: while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32))
1056: {
1057: buffer->offset++;
1058: }
1059:
1060: if (buffer->offset == buffer->length)
1061: {
1062: buffer->offset--;
1063: }
1064:
1065: return buffer;
1066: }
1067:
1068: /* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */
1069: static parse_buffer *skip_utf8_bom(parse_buffer * const buffer)
1070: {
1071: if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0))
1072: {
1073: return NULL;
1074: }
1075:
1076: if (can_access_at_index(buffer, 4) && (strncmp((const char*)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0))
1077: {
1078: buffer->offset += 3;
1079: }
1080:
1081: return buffer;
1082: }
1083:
1084: CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
1085: {
1086: size_t buffer_length;
1087:
1088: if (NULL == value)
1089: {
1090: return NULL;
1091: }
1092:
1093: /* Adding null character size due to require_null_terminated. */
1094: buffer_length = strlen(value) + sizeof("");
1095:
1096: return cJSON_ParseWithLengthOpts(value, buffer_length, return_parse_end, require_null_terminated);
1097: }
1098:
1099: /* Parse an object - create a new root, and populate. */
1100: CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated)
1101: {
1102: parse_buffer buffer = { 0, 0, 0, 0, { 0, 0, 0 } };
1103: cJSON *item = NULL;
1104:
1105: /* reset error position */
1106: global_error.json = NULL;
1107: global_error.position = 0;
1108:
1109: if (value == NULL || 0 == buffer_length)
1110: {
1111: goto fail;
1112: }
1113:
1114: buffer.content = (const unsigned char*)value;
1115: buffer.length = buffer_length;
1116: buffer.offset = 0;
1117: buffer.hooks = global_hooks;
1118:
1119: item = cJSON_New_Item(&global_hooks);
1120: if (item == NULL) /* memory fail */
1121: {
1122: goto fail;
1123: }
1124:
1125: if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer))))
1126: {
1127: /* parse failure. ep is set. */
1128: goto fail;
1129: }
1130:
1131: /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
1132: if (require_null_terminated)
1133: {
1134: buffer_skip_whitespace(&buffer);
1135: if ((buffer.offset >= buffer.length) || buffer_at_offset(&buffer)[0] != '\0')
1136: {
1137: goto fail;
1138: }
1139: }
1140: if (return_parse_end)
1141: {
1142: *return_parse_end = (const char*)buffer_at_offset(&buffer);
1143: }
1144:
1145: return item;
1146:
1147: fail:
1148: if (item != NULL)
1149: {
1150: cJSON_Delete(item);
1151: }
1152:
1153: if (value != NULL)
1154: {
1155: error local_error;
1156: local_error.json = (const unsigned char*)value;
1157: local_error.position = 0;
1158:
1159: if (buffer.offset < buffer.length)
1160: {
1161: local_error.position = buffer.offset;
1162: }
1163: else if (buffer.length > 0)
1164: {
1165: local_error.position = buffer.length - 1;
1166: }
1167:
1168: if (return_parse_end != NULL)
1169: {
1170: *return_parse_end = (const char*)local_error.json + local_error.position;
1171: }
1172:
1173: global_error = local_error;
1174: }
1175:
1176: return NULL;
1177: }
1178:
1179: /* Default options for cJSON_Parse */
1180: CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value)
1181: {
1182: return cJSON_ParseWithOpts(value, 0, 0);
1183: }
1184:
1185: CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length)
1186: {
1187: return cJSON_ParseWithLengthOpts(value, buffer_length, 0, 0);
1188: }
1189:
1190: #define cjson_min(a, b) (((a) < (b)) ? (a) : (b))
1191:
1192: static unsigned char *print(const cJSON * const item, cJSON_bool format, const internal_hooks * const hooks)
1193: {
1194: static const size_t default_buffer_size = 256;
1195: printbuffer buffer[1];
1196: unsigned char *printed = NULL;
1197:
1198: memset(buffer, 0, sizeof(buffer));
1199:
1200: /* create buffer */
1201: buffer->buffer = (unsigned char*) hooks->allocate(default_buffer_size);
1202: buffer->length = default_buffer_size;
1203: buffer->format = format;
1204: buffer->hooks = *hooks;
1205: if (buffer->buffer == NULL)
1206: {
1207: goto fail;
1208: }
1209:
1210: /* print the value */
1211: if (!print_value(item, buffer))
1212: {
1213: goto fail;
1214: }
1215: update_offset(buffer);
1216:
1217: /* check if reallocate is available */
1218: if (hooks->reallocate != NULL)
1219: {
1220: printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1);
1221: if (printed == NULL) {
1222: goto fail;
1223: }
1224: buffer->buffer = NULL;
1225: }
1226: else /* otherwise copy the JSON over to a new buffer */
1227: {
1228: printed = (unsigned char*) hooks->allocate(buffer->offset + 1);
1229: if (printed == NULL)
1230: {
1231: goto fail;
1232: }
1233: memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1));
1234: printed[buffer->offset] = '\0'; /* just to be sure */
1235:
1236: /* free the buffer */
1237: hooks->deallocate(buffer->buffer);
1238: }
1239:
1240: return printed;
1241:
1242: fail:
1243: if (buffer->buffer != NULL)
1244: {
1245: hooks->deallocate(buffer->buffer);
1246: }
1247:
1248: if (printed != NULL)
1249: {
1250: hooks->deallocate(printed);
1251: }
1252:
1253: return NULL;
1254: }
1255:
1256: /* Render a cJSON item/entity/structure to text. */
1257: CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item)
1258: {
1259: return (char*)print(item, true, &global_hooks);
1260: }
1261:
1262: CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item)
1263: {
1264: return (char*)print(item, false, &global_hooks);
1265: }
1266:
1267: CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt)
1268: {
1269: printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
1270:
1271: if (prebuffer < 0)
1272: {
1273: return NULL;
1274: }
1275:
1276: p.buffer = (unsigned char*)global_hooks.allocate((size_t)prebuffer);
1277: if (!p.buffer)
1278: {
1279: return NULL;
1280: }
1281:
1282: p.length = (size_t)prebuffer;
1283: p.offset = 0;
1284: p.noalloc = false;
1285: p.format = fmt;
1286: p.hooks = global_hooks;
1287:
1288: if (!print_value(item, &p))
1289: {
1290: global_hooks.deallocate(p.buffer);
1291: return NULL;
1292: }
1293:
1294: return (char*)p.buffer;
1295: }
1296:
1297: CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format)
1298: {
1299: printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
1300:
1301: if ((length < 0) || (buffer == NULL))
1302: {
1303: return false;
1304: }
1305:
1306: p.buffer = (unsigned char*)buffer;
1307: p.length = (size_t)length;
1308: p.offset = 0;
1309: p.noalloc = true;
1310: p.format = format;
1311: p.hooks = global_hooks;
1312:
1313: return print_value(item, &p);
1314: }
1315:
1316: /* Parser core - when encountering text, process appropriately. */
1317: static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer)
1318: {
1319: if ((input_buffer == NULL) || (input_buffer->content == NULL))
1320: {
1321: return false; /* no input */
1322: }
1323:
1324: /* parse the different types of values */
1325: /* null */
1326: if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0))
1327: {
1328: item->type = cJSON_NULL;
1329: input_buffer->offset += 4;
1330: return true;
1331: }
1332: /* false */
1333: if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0))
1334: {
1335: item->type = cJSON_False;
1336: input_buffer->offset += 5;
1337: return true;
1338: }
1339: /* true */
1340: if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "true", 4) == 0))
1341: {
1342: item->type = cJSON_True;
1343: item->valueint = 1;
1344: input_buffer->offset += 4;
1345: return true;
1346: }
1347: /* string */
1348: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"'))
1349: {
1350: return parse_string(item, input_buffer);
1351: }
1352: /* number */
1353: 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'))))
1354: {
1355: return parse_number(item, input_buffer);
1356: }
1357: /* array */
1358: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '['))
1359: {
1360: return parse_array(item, input_buffer);
1361: }
1362: /* object */
1363: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{'))
1364: {
1365: return parse_object(item, input_buffer);
1366: }
1367:
1368: return false;
1369: }
1370:
1371: /* Render a value to text. */
1372: static cJSON_bool print_value(const cJSON * const item, printbuffer * const output_buffer)
1373: {
1374: unsigned char *output = NULL;
1375:
1376: if ((item == NULL) || (output_buffer == NULL))
1377: {
1378: return false;
1379: }
1380:
1381: switch ((item->type) & 0xFF)
1382: {
1383: case cJSON_NULL:
1384: output = ensure(output_buffer, 5);
1385: if (output == NULL)
1386: {
1387: return false;
1388: }
1389: strcpy((char*)output, "null");
1390: return true;
1391:
1392: case cJSON_False:
1393: output = ensure(output_buffer, 6);
1394: if (output == NULL)
1395: {
1396: return false;
1397: }
1398: strcpy((char*)output, "false");
1399: return true;
1400:
1401: case cJSON_True:
1402: output = ensure(output_buffer, 5);
1403: if (output == NULL)
1404: {
1405: return false;
1406: }
1407: strcpy((char*)output, "true");
1408: return true;
1409:
1410: case cJSON_Number:
1411: return print_number(item, output_buffer);
1412:
1413: case cJSON_Raw:
1414: {
1415: size_t raw_length = 0;
1416: if (item->valuestring == NULL)
1417: {
1418: return false;
1419: }
1420:
1421: raw_length = strlen(item->valuestring) + sizeof("");
1422: output = ensure(output_buffer, raw_length);
1423: if (output == NULL)
1424: {
1425: return false;
1426: }
1427: memcpy(output, item->valuestring, raw_length);
1428: return true;
1429: }
1430:
1431: case cJSON_String:
1432: return print_string(item, output_buffer);
1433:
1434: case cJSON_Array:
1435: return print_array(item, output_buffer);
1436:
1437: case cJSON_Object:
1438: return print_object(item, output_buffer);
1439:
1440: default:
1441: return false;
1442: }
1443: }
1444:
1445: /* Build an array from input text. */
1446: static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer)
1447: {
1448: cJSON *head = NULL; /* head of the linked list */
1449: cJSON *current_item = NULL;
1450:
1451: if (input_buffer->depth >= CJSON_NESTING_LIMIT)
1452: {
1453: return false; /* to deeply nested */
1454: }
1455: input_buffer->depth++;
1456:
1457: if (buffer_at_offset(input_buffer)[0] != '[')
1458: {
1459: /* not an array */
1460: goto fail;
1461: }
1462:
1463: input_buffer->offset++;
1464: buffer_skip_whitespace(input_buffer);
1465: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ']'))
1466: {
1467: /* empty array */
1468: goto success;
1469: }
1470:
1471: /* check if we skipped to the end of the buffer */
1472: if (cannot_access_at_index(input_buffer, 0))
1473: {
1474: input_buffer->offset--;
1475: goto fail;
1476: }
1477:
1478: /* step back to character in front of the first element */
1479: input_buffer->offset--;
1480: /* loop through the comma separated array elements */
1481: do
1482: {
1483: /* allocate next item */
1484: cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
1485: if (new_item == NULL)
1486: {
1487: goto fail; /* allocation failure */
1488: }
1489:
1490: /* attach next item to list */
1491: if (head == NULL)
1492: {
1493: /* start the linked list */
1494: current_item = head = new_item;
1495: }
1496: else
1497: {
1498: /* add to the end and advance */
1499: current_item->next = new_item;
1500: new_item->prev = current_item;
1501: current_item = new_item;
1502: }
1503:
1504: /* parse next value */
1505: input_buffer->offset++;
1506: buffer_skip_whitespace(input_buffer);
1507: if (!parse_value(current_item, input_buffer))
1508: {
1509: goto fail; /* failed to parse value */
1510: }
1511: buffer_skip_whitespace(input_buffer);
1512: }
1513: while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1514:
1515: if (cannot_access_at_index(input_buffer, 0) || buffer_at_offset(input_buffer)[0] != ']')
1516: {
1517: goto fail; /* expected end of array */
1518: }
1519:
1520: success:
1521: input_buffer->depth--;
1522:
1523: item->type = cJSON_Array;
1524: item->child = head;
1525:
1526: input_buffer->offset++;
1527:
1528: return true;
1529:
1530: fail:
1531: if (head != NULL)
1532: {
1533: cJSON_Delete(head);
1534: }
1535:
1536: return false;
1537: }
1538:
1539: /* Render an array to text */
1540: static cJSON_bool print_array(const cJSON * const item, printbuffer * const output_buffer)
1541: {
1542: unsigned char *output_pointer = NULL;
1543: size_t length = 0;
1544: cJSON *current_element = item->child;
1545:
1546: if (output_buffer == NULL)
1547: {
1548: return false;
1549: }
1550:
1551: /* Compose the output array. */
1552: /* opening square bracket */
1553: output_pointer = ensure(output_buffer, 1);
1554: if (output_pointer == NULL)
1555: {
1556: return false;
1557: }
1558:
1559: *output_pointer = '[';
1560: output_buffer->offset++;
1561: output_buffer->depth++;
1562:
1563: while (current_element != NULL)
1564: {
1565: if (!print_value(current_element, output_buffer))
1566: {
1567: return false;
1568: }
1569: update_offset(output_buffer);
1570: if (current_element->next)
1571: {
1572: length = (size_t) (output_buffer->format ? 2 : 1);
1573: output_pointer = ensure(output_buffer, length + 1);
1574: if (output_pointer == NULL)
1575: {
1576: return false;
1577: }
1578: *output_pointer++ = ',';
1579: if(output_buffer->format)
1580: {
1581: *output_pointer++ = ' ';
1582: }
1583: *output_pointer = '\0';
1584: output_buffer->offset += length;
1585: }
1586: current_element = current_element->next;
1587: }
1588:
1589: output_pointer = ensure(output_buffer, 2);
1590: if (output_pointer == NULL)
1591: {
1592: return false;
1593: }
1594: *output_pointer++ = ']';
1595: *output_pointer = '\0';
1596: output_buffer->depth--;
1597:
1598: return true;
1599: }
1600:
1601: /* Build an object from the text. */
1602: static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer)
1603: {
1604: cJSON *head = NULL; /* linked list head */
1605: cJSON *current_item = NULL;
1606:
1607: if (input_buffer->depth >= CJSON_NESTING_LIMIT)
1608: {
1609: return false; /* to deeply nested */
1610: }
1611: input_buffer->depth++;
1612:
1613: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '{'))
1614: {
1615: goto fail; /* not an object */
1616: }
1617:
1618: input_buffer->offset++;
1619: buffer_skip_whitespace(input_buffer);
1620: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '}'))
1621: {
1622: goto success; /* empty object */
1623: }
1624:
1625: /* check if we skipped to the end of the buffer */
1626: if (cannot_access_at_index(input_buffer, 0))
1627: {
1628: input_buffer->offset--;
1629: goto fail;
1630: }
1631:
1632: /* step back to character in front of the first element */
1633: input_buffer->offset--;
1634: /* loop through the comma separated array elements */
1635: do
1636: {
1637: /* allocate next item */
1638: cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks));
1639: if (new_item == NULL)
1640: {
1641: goto fail; /* allocation failure */
1642: }
1643:
1644: /* attach next item to list */
1645: if (head == NULL)
1646: {
1647: /* start the linked list */
1648: current_item = head = new_item;
1649: }
1650: else
1651: {
1652: /* add to the end and advance */
1653: current_item->next = new_item;
1654: new_item->prev = current_item;
1655: current_item = new_item;
1656: }
1657:
1658: /* parse the name of the child */
1659: input_buffer->offset++;
1660: buffer_skip_whitespace(input_buffer);
1661: if (!parse_string(current_item, input_buffer))
1662: {
1663: goto fail; /* failed to parse name */
1664: }
1665: buffer_skip_whitespace(input_buffer);
1666:
1667: /* swap valuestring and string, because we parsed the name */
1668: current_item->string = current_item->valuestring;
1669: current_item->valuestring = NULL;
1670:
1671: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != ':'))
1672: {
1673: goto fail; /* invalid object */
1674: }
1675:
1676: /* parse the value */
1677: input_buffer->offset++;
1678: buffer_skip_whitespace(input_buffer);
1679: if (!parse_value(current_item, input_buffer))
1680: {
1681: goto fail; /* failed to parse value */
1682: }
1683: buffer_skip_whitespace(input_buffer);
1684: }
1685: while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1686:
1687: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '}'))
1688: {
1689: goto fail; /* expected end of object */
1690: }
1691:
1692: success:
1693: input_buffer->depth--;
1694:
1695: item->type = cJSON_Object;
1696: item->child = head;
1697:
1698: input_buffer->offset++;
1699: return true;
1700:
1701: fail:
1702: if (head != NULL)
1703: {
1704: cJSON_Delete(head);
1705: }
1706:
1707: return false;
1708: }
1709:
1710: /* Render an object to text. */
1711: static cJSON_bool print_object(const cJSON * const item, printbuffer * const output_buffer)
1712: {
1713: unsigned char *output_pointer = NULL;
1714: size_t length = 0;
1715: cJSON *current_item = item->child;
1716:
1717: if (output_buffer == NULL)
1718: {
1719: return false;
1720: }
1721:
1722: /* Compose the output: */
1723: length = (size_t) (output_buffer->format ? 2 : 1); /* fmt: {\n */
1724: output_pointer = ensure(output_buffer, length + 1);
1725: if (output_pointer == NULL)
1726: {
1727: return false;
1728: }
1729:
1730: *output_pointer++ = '{';
1731: output_buffer->depth++;
1732: if (output_buffer->format)
1733: {
1734: *output_pointer++ = '\n';
1735: }
1736: output_buffer->offset += length;
1737:
1738: while (current_item)
1739: {
1740: if (output_buffer->format)
1741: {
1742: size_t i;
1743: output_pointer = ensure(output_buffer, output_buffer->depth);
1744: if (output_pointer == NULL)
1745: {
1746: return false;
1747: }
1748: for (i = 0; i < output_buffer->depth; i++)
1749: {
1750: *output_pointer++ = '\t';
1751: }
1752: output_buffer->offset += output_buffer->depth;
1753: }
1754:
1755: /* print key */
1756: if (!print_string_ptr((unsigned char*)current_item->string, output_buffer))
1757: {
1758: return false;
1759: }
1760: update_offset(output_buffer);
1761:
1762: length = (size_t) (output_buffer->format ? 2 : 1);
1763: output_pointer = ensure(output_buffer, length);
1764: if (output_pointer == NULL)
1765: {
1766: return false;
1767: }
1768: *output_pointer++ = ':';
1769: if (output_buffer->format)
1770: {
1771: *output_pointer++ = '\t';
1772: }
1773: output_buffer->offset += length;
1774:
1775: /* print value */
1776: if (!print_value(current_item, output_buffer))
1777: {
1778: return false;
1779: }
1780: update_offset(output_buffer);
1781:
1782: /* print comma if not last */
1783: length = ((size_t)(output_buffer->format ? 1 : 0) + (size_t)(current_item->next ? 1 : 0));
1784: output_pointer = ensure(output_buffer, length + 1);
1785: if (output_pointer == NULL)
1786: {
1787: return false;
1788: }
1789: if (current_item->next)
1790: {
1791: *output_pointer++ = ',';
1792: }
1793:
1794: if (output_buffer->format)
1795: {
1796: *output_pointer++ = '\n';
1797: }
1798: *output_pointer = '\0';
1799: output_buffer->offset += length;
1800:
1801: current_item = current_item->next;
1802: }
1803:
1804: output_pointer = ensure(output_buffer, output_buffer->format ? (output_buffer->depth + 1) : 2);
1805: if (output_pointer == NULL)
1806: {
1807: return false;
1808: }
1809: if (output_buffer->format)
1810: {
1811: size_t i;
1812: for (i = 0; i < (output_buffer->depth - 1); i++)
1813: {
1814: *output_pointer++ = '\t';
1815: }
1816: }
1817: *output_pointer++ = '}';
1818: *output_pointer = '\0';
1819: output_buffer->depth--;
1820:
1821: return true;
1822: }
1823:
1824: /* Get Array size/item / object item. */
1825: CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array)
1826: {
1827: cJSON *child = NULL;
1828: size_t size = 0;
1829:
1830: if (array == NULL)
1831: {
1832: return 0;
1833: }
1834:
1835: child = array->child;
1836:
1837: while(child != NULL)
1838: {
1839: size++;
1840: child = child->next;
1841: }
1842:
1843: /* FIXME: Can overflow here. Cannot be fixed without breaking the API */
1844:
1845: return (int)size;
1846: }
1847:
1848: static cJSON* get_array_item(const cJSON *array, size_t index)
1849: {
1850: cJSON *current_child = NULL;
1851:
1852: if (array == NULL)
1853: {
1854: return NULL;
1855: }
1856:
1857: current_child = array->child;
1858: while ((current_child != NULL) && (index > 0))
1859: {
1860: index--;
1861: current_child = current_child->next;
1862: }
1863:
1864: return current_child;
1865: }
1866:
1867: CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index)
1868: {
1869: if (index < 0)
1870: {
1871: return NULL;
1872: }
1873:
1874: return get_array_item(array, (size_t)index);
1875: }
1876:
1877: static cJSON *get_object_item(const cJSON * const object, const char * const name, const cJSON_bool case_sensitive)
1878: {
1879: cJSON *current_element = NULL;
1880:
1881: if ((object == NULL) || (name == NULL))
1882: {
1883: return NULL;
1884: }
1885:
1886: current_element = object->child;
1887: if (case_sensitive)
1888: {
1889: while ((current_element != NULL) && (current_element->string != NULL) && (strcmp(name, current_element->string) != 0))
1890: {
1891: current_element = current_element->next;
1892: }
1893: }
1894: else
1895: {
1896: while ((current_element != NULL) && (case_insensitive_strcmp((const unsigned char*)name, (const unsigned char*)(current_element->string)) != 0))
1897: {
1898: current_element = current_element->next;
1899: }
1900: }
1901:
1902: if ((current_element == NULL) || (current_element->string == NULL)) {
1903: return NULL;
1904: }
1905:
1906: return current_element;
1907: }
1908:
1909: CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string)
1910: {
1911: return get_object_item(object, string, false);
1912: }
1913:
1914: CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string)
1915: {
1916: return get_object_item(object, string, true);
1917: }
1918:
1919: CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string)
1920: {
1921: return cJSON_GetObjectItem(object, string) ? 1 : 0;
1922: }
1923:
1924: /* Utility for array list handling. */
1925: static void suffix_object(cJSON *prev, cJSON *item)
1926: {
1927: prev->next = item;
1928: item->prev = prev;
1929: }
1930:
1931: /* Utility for handling references. */
1932: static cJSON *create_reference(const cJSON *item, const internal_hooks * const hooks)
1933: {
1934: cJSON *reference = NULL;
1935: if (item == NULL)
1936: {
1937: return NULL;
1938: }
1939:
1940: reference = cJSON_New_Item(hooks);
1941: if (reference == NULL)
1942: {
1943: return NULL;
1944: }
1945:
1946: memcpy(reference, item, sizeof(cJSON));
1947: reference->string = NULL;
1948: reference->type |= cJSON_IsReference;
1949: reference->next = reference->prev = NULL;
1950: return reference;
1951: }
1952:
1953: static cJSON_bool add_item_to_array(cJSON *array, cJSON *item)
1954: {
1955: cJSON *child = NULL;
1956:
1957: if ((item == NULL) || (array == NULL) || (array == item))
1958: {
1959: return false;
1960: }
1961:
1962: child = array->child;
1963: /*
1964: * To find the last item in array quickly, we use prev in array
1965: */
1966: if (child == NULL)
1967: {
1968: /* list is empty, start new one */
1969: array->child = item;
1970: item->prev = item;
1971: item->next = NULL;
1972: }
1973: else
1974: {
1975: /* append to the end */
1976: if (child->prev)
1977: {
1978: suffix_object(child->prev, item);
1979: array->child->prev = item;
1980: }
1981: else
1982: {
1983: while (child->next)
1984: {
1985: child = child->next;
1986: }
1987: suffix_object(child, item);
1988: array->child->prev = item;
1989: }
1990: }
1991:
1992: return true;
1993: }
1994:
1995: /* Add item to array/object. */
1996: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item)
1997: {
1998: return add_item_to_array(array, item);
1999: }
2000:
2001: #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
2002: #pragma GCC diagnostic push
2003: #endif
2004: #ifdef __GNUC__
2005: #pragma GCC diagnostic ignored "-Wcast-qual"
2006: #endif
2007: /* helper function to cast away const */
2008: static void* cast_away_const(const void* string)
2009: {
2010: return (void*)string;
2011: }
2012: #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
2013: #pragma GCC diagnostic pop
2014: #endif
2015:
2016:
2017: static 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)
2018: {
2019: char *new_key = NULL;
2020: int new_type = cJSON_Invalid;
2021:
2022: if ((object == NULL) || (string == NULL) || (item == NULL) || (object == item))
2023: {
2024: return false;
2025: }
2026:
2027: if (constant_key)
2028: {
2029: new_key = (char*)cast_away_const(string);
2030: new_type = item->type | cJSON_StringIsConst;
2031: }
2032: else
2033: {
2034: new_key = (char*)cJSON_strdup((const unsigned char*)string, hooks);
2035: if (new_key == NULL)
2036: {
2037: return false;
2038: }
2039:
2040: new_type = item->type & ~cJSON_StringIsConst;
2041: }
2042:
2043: if (!(item->type & cJSON_StringIsConst) && (item->string != NULL))
2044: {
2045: hooks->deallocate(item->string);
2046: }
2047:
2048: item->string = new_key;
2049: item->type = new_type;
2050:
2051: return add_item_to_array(object, item);
2052: }
2053:
2054: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item)
2055: {
2056: return add_item_to_object(object, string, item, &global_hooks, false);
2057: }
2058:
2059: /* Add an item to an object with constant string as key */
2060: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
2061: {
2062: return add_item_to_object(object, string, item, &global_hooks, true);
2063: }
2064:
2065: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)
2066: {
2067: if (array == NULL)
2068: {
2069: return false;
2070: }
2071:
2072: return add_item_to_array(array, create_reference(item, &global_hooks));
2073: }
2074:
2075: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item)
2076: {
2077: if ((object == NULL) || (string == NULL))
2078: {
2079: return false;
2080: }
2081:
2082: return add_item_to_object(object, string, create_reference(item, &global_hooks), &global_hooks, false);
2083: }
2084:
2085: CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name)
2086: {
2087: cJSON *null = cJSON_CreateNull();
2088: if (add_item_to_object(object, name, null, &global_hooks, false))
2089: {
2090: return null;
2091: }
2092:
2093: cJSON_Delete(null);
2094: return NULL;
2095: }
2096:
2097: CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name)
2098: {
2099: cJSON *true_item = cJSON_CreateTrue();
2100: if (add_item_to_object(object, name, true_item, &global_hooks, false))
2101: {
2102: return true_item;
2103: }
2104:
2105: cJSON_Delete(true_item);
2106: return NULL;
2107: }
2108:
2109: CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name)
2110: {
2111: cJSON *false_item = cJSON_CreateFalse();
2112: if (add_item_to_object(object, name, false_item, &global_hooks, false))
2113: {
2114: return false_item;
2115: }
2116:
2117: cJSON_Delete(false_item);
2118: return NULL;
2119: }
2120:
2121: CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean)
2122: {
2123: cJSON *bool_item = cJSON_CreateBool(boolean);
2124: if (add_item_to_object(object, name, bool_item, &global_hooks, false))
2125: {
2126: return bool_item;
2127: }
2128:
2129: cJSON_Delete(bool_item);
2130: return NULL;
2131: }
2132:
2133: CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number)
2134: {
2135: cJSON *number_item = cJSON_CreateNumber(number);
2136: if (add_item_to_object(object, name, number_item, &global_hooks, false))
2137: {
2138: return number_item;
2139: }
2140:
2141: cJSON_Delete(number_item);
2142: return NULL;
2143: }
2144:
2145: CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string)
2146: {
2147: cJSON *string_item = cJSON_CreateString(string);
2148: if (add_item_to_object(object, name, string_item, &global_hooks, false))
2149: {
2150: return string_item;
2151: }
2152:
2153: cJSON_Delete(string_item);
2154: return NULL;
2155: }
2156:
2157: CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw)
2158: {
2159: cJSON *raw_item = cJSON_CreateRaw(raw);
2160: if (add_item_to_object(object, name, raw_item, &global_hooks, false))
2161: {
2162: return raw_item;
2163: }
2164:
2165: cJSON_Delete(raw_item);
2166: return NULL;
2167: }
2168:
2169: CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name)
2170: {
2171: cJSON *object_item = cJSON_CreateObject();
2172: if (add_item_to_object(object, name, object_item, &global_hooks, false))
2173: {
2174: return object_item;
2175: }
2176:
2177: cJSON_Delete(object_item);
2178: return NULL;
2179: }
2180:
2181: CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name)
2182: {
2183: cJSON *array = cJSON_CreateArray();
2184: if (add_item_to_object(object, name, array, &global_hooks, false))
2185: {
2186: return array;
2187: }
2188:
2189: cJSON_Delete(array);
2190: return NULL;
2191: }
2192:
2193: CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item)
2194: {
2195: if ((parent == NULL) || (item == NULL))
2196: {
2197: return NULL;
2198: }
2199:
2200: if (item != parent->child)
2201: {
2202: /* not the first element */
2203: item->prev->next = item->next;
2204: }
2205: if (item->next != NULL)
2206: {
2207: /* not the last element */
2208: item->next->prev = item->prev;
2209: }
2210:
2211: if (item == parent->child)
2212: {
2213: /* first element */
2214: parent->child = item->next;
2215: }
2216: /* make sure the detached item doesn't point anywhere anymore */
2217: item->prev = NULL;
2218: item->next = NULL;
2219:
2220: return item;
2221: }
2222:
2223: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
2224: {
2225: if (which < 0)
2226: {
2227: return NULL;
2228: }
2229:
2230: return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which));
2231: }
2232:
2233: CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which)
2234: {
2235: cJSON_Delete(cJSON_DetachItemFromArray(array, which));
2236: }
2237:
2238: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string)
2239: {
2240: cJSON *to_detach = cJSON_GetObjectItem(object, string);
2241:
2242: return cJSON_DetachItemViaPointer(object, to_detach);
2243: }
2244:
2245: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string)
2246: {
2247: cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string);
2248:
2249: return cJSON_DetachItemViaPointer(object, to_detach);
2250: }
2251:
2252: CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string)
2253: {
2254: cJSON_Delete(cJSON_DetachItemFromObject(object, string));
2255: }
2256:
2257: CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string)
2258: {
2259: cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string));
2260: }
2261:
2262: /* Replace array/object items with new ones. */
2263: CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
2264: {
2265: cJSON *after_inserted = NULL;
2266:
2267: if (which < 0)
2268: {
2269: return false;
2270: }
2271:
2272: after_inserted = get_array_item(array, (size_t)which);
2273: if (after_inserted == NULL)
2274: {
2275: return add_item_to_array(array, newitem);
2276: }
2277:
2278: newitem->next = after_inserted;
2279: newitem->prev = after_inserted->prev;
2280: after_inserted->prev = newitem;
2281: if (after_inserted == array->child)
2282: {
2283: array->child = newitem;
2284: }
2285: else
2286: {
2287: newitem->prev->next = newitem;
2288: }
2289: return true;
2290: }
2291:
2292: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement)
2293: {
2294: if ((parent == NULL) || (replacement == NULL) || (item == NULL))
2295: {
2296: return false;
2297: }
2298:
2299: if (replacement == item)
2300: {
2301: return true;
2302: }
2303:
2304: replacement->next = item->next;
2305: replacement->prev = item->prev;
2306:
2307: if (replacement->next != NULL)
2308: {
2309: replacement->next->prev = replacement;
2310: }
2311: if (parent->child == item)
2312: {
2313: parent->child = replacement;
2314: }
2315: else
2316: { /*
2317: * To find the last item in array quickly, we use prev in array.
2318: * We can't modify the last item's next pointer where this item was the parent's child
2319: */
2320: if (replacement->prev != NULL)
2321: {
2322: replacement->prev->next = replacement;
2323: }
2324: }
2325:
2326: item->next = NULL;
2327: item->prev = NULL;
2328: cJSON_Delete(item);
2329:
2330: return true;
2331: }
2332:
2333: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
2334: {
2335: if (which < 0)
2336: {
2337: return false;
2338: }
2339:
2340: return cJSON_ReplaceItemViaPointer(array, get_array_item(array, (size_t)which), newitem);
2341: }
2342:
2343: static cJSON_bool replace_item_in_object(cJSON *object, const char *string, cJSON *replacement, cJSON_bool case_sensitive)
2344: {
2345: if ((replacement == NULL) || (string == NULL))
2346: {
2347: return false;
2348: }
2349:
2350: /* replace the name in the replacement */
2351: if (!(replacement->type & cJSON_StringIsConst) && (replacement->string != NULL))
2352: {
2353: cJSON_free(replacement->string);
2354: }
2355: replacement->string = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
2356: replacement->type &= ~cJSON_StringIsConst;
2357:
2358: return cJSON_ReplaceItemViaPointer(object, get_object_item(object, string, case_sensitive), replacement);
2359: }
2360:
2361: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem)
2362: {
2363: return replace_item_in_object(object, string, newitem, false);
2364: }
2365:
2366: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object, const char *string, cJSON *newitem)
2367: {
2368: return replace_item_in_object(object, string, newitem, true);
2369: }
2370:
2371: /* Create basic types: */
2372: CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void)
2373: {
2374: cJSON *item = cJSON_New_Item(&global_hooks);
2375: if(item)
2376: {
2377: item->type = cJSON_NULL;
2378: }
2379:
2380: return item;
2381: }
2382:
2383: CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void)
2384: {
2385: cJSON *item = cJSON_New_Item(&global_hooks);
2386: if(item)
2387: {
2388: item->type = cJSON_True;
2389: }
2390:
2391: return item;
2392: }
2393:
2394: CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void)
2395: {
2396: cJSON *item = cJSON_New_Item(&global_hooks);
2397: if(item)
2398: {
2399: item->type = cJSON_False;
2400: }
2401:
2402: return item;
2403: }
2404:
2405: CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean)
2406: {
2407: cJSON *item = cJSON_New_Item(&global_hooks);
2408: if(item)
2409: {
2410: item->type = boolean ? cJSON_True : cJSON_False;
2411: }
2412:
2413: return item;
2414: }
2415:
2416: CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
2417: {
2418: cJSON *item = cJSON_New_Item(&global_hooks);
2419: if(item)
2420: {
2421: item->type = cJSON_Number;
2422: item->valuedouble = num;
2423:
2424: /* use saturation in case of overflow */
2425: if (num >= LLONG_MAX)
2426: {
2427: item->valueint = LLONG_MAX;
2428: }
2429: else if (num <= (double)LLONG_MIN)
2430: {
2431: item->valueint = LLONG_MIN;
2432: }
2433: else
2434: {
2435: item->valueint = (int64_t)num;
2436: }
2437: }
2438:
2439: return item;
2440: }
2441:
2442: CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string)
2443: {
2444: cJSON *item = cJSON_New_Item(&global_hooks);
2445: if(item)
2446: {
2447: item->type = cJSON_String;
2448: item->valuestring = (char*)cJSON_strdup((const unsigned char*)string, &global_hooks);
2449: if(!item->valuestring)
2450: {
2451: cJSON_Delete(item);
2452: return NULL;
2453: }
2454: }
2455:
2456: return item;
2457: }
2458:
2459: CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string)
2460: {
2461: cJSON *item = cJSON_New_Item(&global_hooks);
2462: if (item != NULL)
2463: {
2464: item->type = cJSON_String | cJSON_IsReference;
2465: item->valuestring = (char*)cast_away_const(string);
2466: }
2467:
2468: return item;
2469: }
2470:
2471: CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child)
2472: {
2473: cJSON *item = cJSON_New_Item(&global_hooks);
2474: if (item != NULL) {
2475: item->type = cJSON_Object | cJSON_IsReference;
2476: item->child = (cJSON*)cast_away_const(child);
2477: }
2478:
2479: return item;
2480: }
2481:
2482: CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child) {
2483: cJSON *item = cJSON_New_Item(&global_hooks);
2484: if (item != NULL) {
2485: item->type = cJSON_Array | cJSON_IsReference;
2486: item->child = (cJSON*)cast_away_const(child);
2487: }
2488:
2489: return item;
2490: }
2491:
2492: CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw)
2493: {
2494: cJSON *item = cJSON_New_Item(&global_hooks);
2495: if(item)
2496: {
2497: item->type = cJSON_Raw;
2498: item->valuestring = (char*)cJSON_strdup((const unsigned char*)raw, &global_hooks);
2499: if(!item->valuestring)
2500: {
2501: cJSON_Delete(item);
2502: return NULL;
2503: }
2504: }
2505:
2506: return item;
2507: }
2508:
2509: CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void)
2510: {
2511: cJSON *item = cJSON_New_Item(&global_hooks);
2512: if(item)
2513: {
2514: item->type=cJSON_Array;
2515: }
2516:
2517: return item;
2518: }
2519:
2520: CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void)
2521: {
2522: cJSON *item = cJSON_New_Item(&global_hooks);
2523: if (item)
2524: {
2525: item->type = cJSON_Object;
2526: }
2527:
2528: return item;
2529: }
2530:
2531: /* Create Arrays: */
2532: CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count)
2533: {
2534: size_t i = 0;
2535: cJSON *n = NULL;
2536: cJSON *p = NULL;
2537: cJSON *a = NULL;
2538:
2539: if ((count < 0) || (numbers == NULL))
2540: {
2541: return NULL;
2542: }
2543:
2544: a = cJSON_CreateArray();
2545: for(i = 0; a && (i < (size_t)count); i++)
2546: {
2547: n = cJSON_CreateNumber(numbers[i]);
2548: if (!n)
2549: {
2550: cJSON_Delete(a);
2551: return NULL;
2552: }
2553: if(!i)
2554: {
2555: a->child = n;
2556: }
2557: else
2558: {
2559: suffix_object(p, n);
2560: }
2561: p = n;
2562: }
2563:
2564: return a;
2565: }
2566:
2567: CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
2568: {
2569: size_t i = 0;
2570: cJSON *n = NULL;
2571: cJSON *p = NULL;
2572: cJSON *a = NULL;
2573:
2574: if ((count < 0) || (numbers == NULL))
2575: {
2576: return NULL;
2577: }
2578:
2579: a = cJSON_CreateArray();
2580:
2581: for(i = 0; a && (i < (size_t)count); i++)
2582: {
2583: n = cJSON_CreateNumber((double)numbers[i]);
2584: if(!n)
2585: {
2586: cJSON_Delete(a);
2587: return NULL;
2588: }
2589: if(!i)
2590: {
2591: a->child = n;
2592: }
2593: else
2594: {
2595: suffix_object(p, n);
2596: }
2597: p = n;
2598: }
2599:
2600: return a;
2601: }
2602:
2603: CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count)
2604: {
2605: size_t i = 0;
2606: cJSON *n = NULL;
2607: cJSON *p = NULL;
2608: cJSON *a = NULL;
2609:
2610: if ((count < 0) || (numbers == NULL))
2611: {
2612: return NULL;
2613: }
2614:
2615: a = cJSON_CreateArray();
2616:
2617: for(i = 0;a && (i < (size_t)count); i++)
2618: {
2619: n = cJSON_CreateNumber(numbers[i]);
2620: if(!n)
2621: {
2622: cJSON_Delete(a);
2623: return NULL;
2624: }
2625: if(!i)
2626: {
2627: a->child = n;
2628: }
2629: else
2630: {
2631: suffix_object(p, n);
2632: }
2633: p = n;
2634: }
2635:
2636: return a;
2637: }
2638:
2639: CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count)
2640: {
2641: size_t i = 0;
2642: cJSON *n = NULL;
2643: cJSON *p = NULL;
2644: cJSON *a = NULL;
2645:
2646: if ((count < 0) || (strings == NULL))
2647: {
2648: return NULL;
2649: }
2650:
2651: a = cJSON_CreateArray();
2652:
2653: for (i = 0; a && (i < (size_t)count); i++)
2654: {
2655: n = cJSON_CreateString(strings[i]);
2656: if(!n)
2657: {
2658: cJSON_Delete(a);
2659: return NULL;
2660: }
2661: if(!i)
2662: {
2663: a->child = n;
2664: }
2665: else
2666: {
2667: suffix_object(p,n);
2668: }
2669: p = n;
2670: }
2671:
2672: return a;
2673: }
2674:
2675: /* Duplication */
2676: CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse)
2677: {
2678: cJSON *newitem = NULL;
2679: cJSON *child = NULL;
2680: cJSON *next = NULL;
2681: cJSON *newchild = NULL;
2682:
2683: /* Bail on bad ptr */
2684: if (!item)
2685: {
2686: goto fail;
2687: }
2688: /* Create new item */
2689: newitem = cJSON_New_Item(&global_hooks);
2690: if (!newitem)
2691: {
2692: goto fail;
2693: }
2694: /* Copy over all vars */
2695: newitem->type = item->type & (~cJSON_IsReference);
2696: newitem->valueint = item->valueint;
2697: newitem->valuedouble = item->valuedouble;
2698: if (item->valuestring)
2699: {
2700: newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring, &global_hooks);
2701: if (!newitem->valuestring)
2702: {
2703: goto fail;
2704: }
2705: }
2706: if (item->string)
2707: {
2708: newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string, &global_hooks);
2709: if (!newitem->string)
2710: {
2711: goto fail;
2712: }
2713: }
2714: /* If non-recursive, then we're done! */
2715: if (!recurse)
2716: {
2717: return newitem;
2718: }
2719: /* Walk the ->next chain for the child. */
2720: child = item->child;
2721: while (child != NULL)
2722: {
2723: newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */
2724: if (!newchild)
2725: {
2726: goto fail;
2727: }
2728: if (next != NULL)
2729: {
2730: /* If newitem->child already set, then crosswire ->prev and ->next and move on */
2731: next->next = newchild;
2732: newchild->prev = next;
2733: next = newchild;
2734: }
2735: else
2736: {
2737: /* Set newitem->child and move to it */
2738: newitem->child = newchild;
2739: next = newchild;
2740: }
2741: child = child->next;
2742: }
2743:
2744: return newitem;
2745:
2746: fail:
2747: if (newitem != NULL)
2748: {
2749: cJSON_Delete(newitem);
2750: }
2751:
2752: return NULL;
2753: }
2754:
2755: static void skip_oneline_comment(char **input)
2756: {
2757: *input += static_strlen("//");
2758:
2759: for (; (*input)[0] != '\0'; ++(*input))
2760: {
2761: if ((*input)[0] == '\n') {
2762: *input += static_strlen("\n");
2763: return;
2764: }
2765: }
2766: }
2767:
2768: static void skip_multiline_comment(char **input)
2769: {
2770: *input += static_strlen("/*");
2771:
2772: for (; (*input)[0] != '\0'; ++(*input))
2773: {
2774: if (((*input)[0] == '*') && ((*input)[1] == '/'))
2775: {
2776: *input += static_strlen("*/");
2777: return;
2778: }
2779: }
2780: }
2781:
2782: static void minify_string(char **input, char **output) {
2783: (*output)[0] = (*input)[0];
2784: *input += static_strlen("\"");
2785: *output += static_strlen("\"");
2786:
2787:
2788: for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) {
2789: (*output)[0] = (*input)[0];
2790:
2791: if ((*input)[0] == '\"') {
2792: (*output)[0] = '\"';
2793: *input += static_strlen("\"");
2794: *output += static_strlen("\"");
2795: return;
2796: } else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) {
2797: (*output)[1] = (*input)[1];
2798: *input += static_strlen("\"");
2799: *output += static_strlen("\"");
2800: }
2801: }
2802: }
2803:
2804: CJSON_PUBLIC(void) cJSON_Minify(char *json)
2805: {
2806: char *into = json;
2807:
2808: if (json == NULL)
2809: {
2810: return;
2811: }
2812:
2813: while (json[0] != '\0')
2814: {
2815: switch (json[0])
2816: {
2817: case ' ':
2818: case '\t':
2819: case '\r':
2820: case '\n':
2821: json++;
2822: break;
2823:
2824: case '/':
2825: if (json[1] == '/')
2826: {
2827: skip_oneline_comment(&json);
2828: }
2829: else if (json[1] == '*')
2830: {
2831: skip_multiline_comment(&json);
2832: } else {
2833: json++;
2834: }
2835: break;
2836:
2837: case '\"':
2838: minify_string(&json, (char**)&into);
2839: break;
2840:
2841: default:
2842: into[0] = json[0];
2843: json++;
2844: into++;
2845: }
2846: }
2847:
2848: /* and null-terminate. */
2849: *into = '\0';
2850: }
2851:
2852: CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item)
2853: {
2854: if (item == NULL)
2855: {
2856: return false;
2857: }
2858:
2859: return (item->type & 0xFF) == cJSON_Invalid;
2860: }
2861:
2862: CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item)
2863: {
2864: if (item == NULL)
2865: {
2866: return false;
2867: }
2868:
2869: return (item->type & 0xFF) == cJSON_False;
2870: }
2871:
2872: CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item)
2873: {
2874: if (item == NULL)
2875: {
2876: return false;
2877: }
2878:
2879: return (item->type & 0xff) == cJSON_True;
2880: }
2881:
2882:
2883: CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item)
2884: {
2885: if (item == NULL)
2886: {
2887: return false;
2888: }
2889:
2890: return (item->type & (cJSON_True | cJSON_False)) != 0;
2891: }
2892: CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item)
2893: {
2894: if (item == NULL)
2895: {
2896: return false;
2897: }
2898:
2899: return (item->type & 0xFF) == cJSON_NULL;
2900: }
2901:
2902: CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item)
2903: {
2904: if (item == NULL)
2905: {
2906: return false;
2907: }
2908:
2909: return (item->type & 0xFF) == cJSON_Number;
2910: }
2911:
2912: CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item)
2913: {
2914: if (item == NULL)
2915: {
2916: return false;
2917: }
2918:
2919: return (item->type & 0xFF) == cJSON_String;
2920: }
2921:
2922: CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item)
2923: {
2924: if (item == NULL)
2925: {
2926: return false;
2927: }
2928:
2929: return (item->type & 0xFF) == cJSON_Array;
2930: }
2931:
2932: CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item)
2933: {
2934: if (item == NULL)
2935: {
2936: return false;
2937: }
2938:
2939: return (item->type & 0xFF) == cJSON_Object;
2940: }
2941:
2942: CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item)
2943: {
2944: if (item == NULL)
2945: {
2946: return false;
2947: }
2948:
2949: return (item->type & 0xFF) == cJSON_Raw;
2950: }
2951:
2952: CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive)
2953: {
2954: if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF)) || cJSON_IsInvalid(a))
2955: {
2956: return false;
2957: }
2958:
2959: /* check if type is valid */
2960: switch (a->type & 0xFF)
2961: {
2962: case cJSON_False:
2963: case cJSON_True:
2964: case cJSON_NULL:
2965: case cJSON_Number:
2966: case cJSON_String:
2967: case cJSON_Raw:
2968: case cJSON_Array:
2969: case cJSON_Object:
2970: break;
2971:
2972: default:
2973: return false;
2974: }
2975:
2976: /* identical objects are equal */
2977: if (a == b)
2978: {
2979: return true;
2980: }
2981:
2982: switch (a->type & 0xFF)
2983: {
2984: /* in these cases and equal type is enough */
2985: case cJSON_False:
2986: case cJSON_True:
2987: case cJSON_NULL:
2988: return true;
2989:
2990: case cJSON_Number:
2991: if (compare_double(a->valuedouble, b->valuedouble))
2992: {
2993: return true;
2994: }
2995: return false;
2996:
2997: case cJSON_String:
2998: case cJSON_Raw:
2999: if ((a->valuestring == NULL) || (b->valuestring == NULL))
3000: {
3001: return false;
3002: }
3003: if (strcmp(a->valuestring, b->valuestring) == 0)
3004: {
3005: return true;
3006: }
3007:
3008: return false;
3009:
3010: case cJSON_Array:
3011: {
3012: cJSON *a_element = a->child;
3013: cJSON *b_element = b->child;
3014:
3015: for (; (a_element != NULL) && (b_element != NULL);)
3016: {
3017: if (!cJSON_Compare(a_element, b_element, case_sensitive))
3018: {
3019: return false;
3020: }
3021:
3022: a_element = a_element->next;
3023: b_element = b_element->next;
3024: }
3025:
3026: /* one of the arrays is longer than the other */
3027: if (a_element != b_element) {
3028: return false;
3029: }
3030:
3031: return true;
3032: }
3033:
3034: case cJSON_Object:
3035: {
3036: cJSON *a_element = NULL;
3037: cJSON *b_element = NULL;
3038: cJSON_ArrayForEach(a_element, a)
3039: {
3040: /* TODO This has O(n^2) runtime, which is horrible! */
3041: b_element = get_object_item(b, a_element->string, case_sensitive);
3042: if (b_element == NULL)
3043: {
3044: return false;
3045: }
3046:
3047: if (!cJSON_Compare(a_element, b_element, case_sensitive))
3048: {
3049: return false;
3050: }
3051: }
3052:
3053: /* doing this twice, once on a and b to prevent true comparison if a subset of b
3054: * TODO: Do this the proper way, this is just a fix for now */
3055: cJSON_ArrayForEach(b_element, b)
3056: {
3057: a_element = get_object_item(a, b_element->string, case_sensitive);
3058: if (a_element == NULL)
3059: {
3060: return false;
3061: }
3062:
3063: if (!cJSON_Compare(b_element, a_element, case_sensitive))
3064: {
3065: return false;
3066: }
3067: }
3068:
3069: return true;
3070: }
3071:
3072: default:
3073: return false;
3074: }
3075: }
3076:
3077: CJSON_PUBLIC(void *) cJSON_malloc(size_t size)
3078: {
3079: return global_hooks.allocate(size);
3080: }
3081:
3082: CJSON_PUBLIC(void) cJSON_free(void *object)
3083: {
3084: global_hooks.deallocate(object);
3085: }
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