mirror of
https://github.com/DaveGamble/cJSON
synced 2024-12-24 23:52:07 +00:00
2389 lines
55 KiB
C
2389 lines
55 KiB
C
/*
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Copyright (c) 2009 Dave Gamble
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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/* cJSON */
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/* JSON parser in C. */
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#include <float.h>
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#include <limits.h>
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#include <ctype.h>
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#include "cJSON.h"
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/* define our own boolean type */
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typedef int cjbool;
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#define true ((cjbool)1)
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#define false ((cjbool)0)
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static const unsigned char *global_ep = NULL;
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const char *cJSON_GetErrorPtr(void)
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{
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return (const char*) global_ep;
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}
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/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
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#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 3) || (CJSON_VERSION_PATCH != 0)
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#error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
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#endif
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extern const char* cJSON_Version(void)
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{
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static char version[15];
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sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
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return version;
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}
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/* case insensitive strcmp */
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static int cJSON_strcasecmp(const unsigned char *s1, const unsigned char *s2)
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{
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if (!s1)
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{
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return (s1 == s2) ? 0 : 1; /* both NULL? */
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}
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if (!s2)
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{
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return 1;
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}
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for(; tolower(*s1) == tolower(*s2); ++s1, ++s2)
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{
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if (*s1 == '\0')
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{
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return 0;
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}
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}
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return tolower(*s1) - tolower(*s2);
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}
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static void *(*cJSON_malloc)(size_t sz) = malloc;
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static void (*cJSON_free)(void *ptr) = free;
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static void *(*cJSON_realloc)(void *pointer, size_t size) = realloc;
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static unsigned char* cJSON_strdup(const unsigned char* str)
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{
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size_t len = 0;
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unsigned char *copy = NULL;
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if (str == NULL)
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{
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return NULL;
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}
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len = strlen((const char*)str) + 1;
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if (!(copy = (unsigned char*)cJSON_malloc(len)))
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{
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return NULL;
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}
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memcpy(copy, str, len);
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return copy;
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}
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void cJSON_InitHooks(cJSON_Hooks* hooks)
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{
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if (hooks == NULL)
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{
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/* Reset hooks */
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cJSON_malloc = malloc;
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cJSON_free = free;
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cJSON_realloc = realloc;
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return;
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}
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cJSON_malloc = malloc;
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if (hooks->malloc_fn != NULL)
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{
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cJSON_malloc = hooks->malloc_fn;
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}
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cJSON_free = free;
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if (hooks->free_fn != NULL)
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{
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cJSON_free = hooks->free_fn;
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}
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/* use realloc only if both free and malloc are used */
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cJSON_realloc = NULL;
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if ((cJSON_malloc == malloc) && (cJSON_free == free))
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{
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cJSON_realloc = realloc;
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}
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}
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/* Internal constructor. */
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static cJSON *cJSON_New_Item(void)
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{
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cJSON* node = (cJSON*)cJSON_malloc(sizeof(cJSON));
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if (node)
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{
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memset(node, '\0', sizeof(cJSON));
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}
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return node;
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}
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/* Delete a cJSON structure. */
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void cJSON_Delete(cJSON *c)
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{
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cJSON *next = NULL;
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while (c)
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{
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next = c->next;
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if (!(c->type & cJSON_IsReference) && c->child)
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{
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cJSON_Delete(c->child);
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}
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if (!(c->type & cJSON_IsReference) && c->valuestring)
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{
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cJSON_free(c->valuestring);
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}
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if (!(c->type & cJSON_StringIsConst) && c->string)
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{
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cJSON_free(c->string);
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}
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cJSON_free(c);
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c = next;
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}
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}
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/* Parse the input text to generate a number, and populate the result into item. */
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static const unsigned char *parse_number(cJSON * const item, const unsigned char * const input)
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{
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double number = 0;
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unsigned char *after_end = NULL;
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if (input == NULL)
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{
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return NULL;
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}
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number = strtod((const char*)input, (char**)&after_end);
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if (input == after_end)
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{
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return NULL; /* parse_error */
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}
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item->valuedouble = number;
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/* use saturation in case of overflow */
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if (number >= INT_MAX)
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{
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item->valueint = INT_MAX;
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}
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else if (number <= INT_MIN)
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{
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item->valueint = INT_MIN;
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}
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else
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{
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item->valueint = (int)number;
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}
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item->type = cJSON_Number;
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return after_end;
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}
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/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
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double cJSON_SetNumberHelper(cJSON *object, double number)
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{
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if (number >= INT_MAX)
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{
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object->valueint = INT_MAX;
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}
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else if (number <= INT_MIN)
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{
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object->valueint = INT_MIN;
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}
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else
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{
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object->valueint = cJSON_Number;
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}
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return object->valuedouble = number;
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}
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typedef struct
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{
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unsigned char *buffer;
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size_t length;
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size_t offset;
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cjbool noalloc;
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} printbuffer;
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/* realloc printbuffer if necessary to have at least "needed" bytes more */
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static unsigned char* ensure(printbuffer *p, size_t needed)
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{
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unsigned char *newbuffer = NULL;
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size_t newsize = 0;
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if (p == NULL)
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{
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return (unsigned char*)cJSON_malloc(needed);
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}
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if (needed > INT_MAX)
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{
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/* sizes bigger than INT_MAX are currently not supported */
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return NULL;
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}
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if (p->buffer == NULL)
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{
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return NULL;
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}
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needed += p->offset;
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if (needed <= p->length)
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{
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return p->buffer + p->offset;
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}
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if (p->noalloc) {
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return NULL;
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}
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/* calculate new buffer size */
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newsize = needed * 2;
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if (newsize > INT_MAX)
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{
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/* overflow of int, use INT_MAX if possible */
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if (needed <= INT_MAX)
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{
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newsize = INT_MAX;
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}
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else
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{
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return NULL;
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}
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}
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if (cJSON_realloc != NULL)
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{
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/* reallocate with realloc if available */
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newbuffer = (unsigned char*)cJSON_realloc(p->buffer, newsize);
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}
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else
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{
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/* otherwise reallocate manually */
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newbuffer = (unsigned char*)cJSON_malloc(newsize);
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if (!newbuffer)
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{
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cJSON_free(p->buffer);
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p->length = 0;
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p->buffer = NULL;
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return NULL;
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}
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if (newbuffer)
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{
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memcpy(newbuffer, p->buffer, p->offset + 1);
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}
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cJSON_free(p->buffer);
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}
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p->length = newsize;
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p->buffer = newbuffer;
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return newbuffer + p->offset;
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}
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/* calculate the new length of the string in a printbuffer */
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static size_t update(const printbuffer *p)
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{
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const unsigned char *str = NULL;
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if (!p || !p->buffer)
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{
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return 0;
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}
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str = p->buffer + p->offset;
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return p->offset + strlen((const char*)str);
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}
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/* Render the number nicely from the given item into a string. */
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static unsigned char *print_number(const cJSON *item, printbuffer *p)
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{
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unsigned char *str = NULL;
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double d = item->valuedouble;
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/* special case for 0. */
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if (d == 0)
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{
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str = ensure(p, 2);
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if (str != NULL)
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{
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strcpy((char*)str,"0");
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}
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}
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/* value is an int */
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else if ((fabs(((double)item->valueint) - d) <= DBL_EPSILON) && (d <= INT_MAX) && (d >= INT_MIN))
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{
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/* 2^64+1 can be represented in 21 chars. */
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str = ensure(p, 21);
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if (str != NULL)
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{
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sprintf((char*)str, "%d", item->valueint);
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}
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}
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/* value is a floating point number */
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else
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{
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/* This is a nice tradeoff. */
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str = ensure(p, 64);
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if (str != NULL)
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{
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/* This checks for NaN and Infinity */
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if ((d * 0) != 0)
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{
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sprintf((char*)str, "null");
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}
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else if ((fabs(floor(d) - d) <= DBL_EPSILON) && (fabs(d) < 1.0e60))
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{
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sprintf((char*)str, "%.0f", d);
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}
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else if ((fabs(d) < 1.0e-6) || (fabs(d) > 1.0e9))
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{
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sprintf((char*)str, "%e", d);
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}
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else
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{
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sprintf((char*)str, "%f", d);
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}
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}
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}
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return str;
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}
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/* parse 4 digit hexadecimal number */
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static unsigned parse_hex4(const unsigned char * const input)
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{
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unsigned int h = 0;
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size_t i = 0;
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for (i = 0; i < 4; i++)
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{
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/* parse digit */
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if ((input[i] >= '0') && (input[i] <= '9'))
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{
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h += (unsigned int) input[i] - '0';
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}
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else if ((input[i] >= 'A') && (input[i] <= 'F'))
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{
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h += (unsigned int) 10 + input[i] - 'A';
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}
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else if ((input[i] >= 'a') && (input[i] <= 'f'))
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{
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h += (unsigned int) 10 + input[i] - 'a';
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}
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else /* invalid */
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{
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return 0;
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}
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if (i < 3)
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{
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/* shift left to make place for the next nibble */
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h = h << 4;
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}
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}
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return h;
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}
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/* converts a UTF-16 literal to UTF-8
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* A literal can be one or two sequences of the form \uXXXX */
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static unsigned char utf16_literal_to_utf8(const unsigned char * const input_pointer, const unsigned char * const input_end, unsigned char **output_pointer, const unsigned char **error_pointer)
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{
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/* first bytes of UTF8 encoding for a given length in bytes */
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static const unsigned char firstByteMark[5] =
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{
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0x00, /* should never happen */
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0x00, /* 0xxxxxxx */
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0xC0, /* 110xxxxx */
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0xE0, /* 1110xxxx */
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0xF0 /* 11110xxx */
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};
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long unsigned int codepoint = 0;
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unsigned int first_code = 0;
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const unsigned char *first_sequence = input_pointer;
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unsigned char utf8_length = 0;
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unsigned char sequence_length = 0;
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/* get the first utf16 sequence */
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first_code = parse_hex4(first_sequence + 2);
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if ((input_end - first_sequence) < 6)
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{
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/* input ends unexpectedly */
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*error_pointer = first_sequence;
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goto fail;
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}
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/* check that the code is valid */
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if (((first_code >= 0xDC00) && (first_code <= 0xDFFF)) || (first_code == 0))
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{
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*error_pointer = first_sequence;
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goto fail;
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}
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/* UTF16 surrogate pair */
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if ((first_code >= 0xD800) && (first_code <= 0xDBFF))
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{
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const unsigned char *second_sequence = first_sequence + 6;
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unsigned int second_code = 0;
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sequence_length = 12; /* \uXXXX\uXXXX */
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if ((input_end - second_sequence) < 6)
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{
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/* input ends unexpectedly */
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*error_pointer = first_sequence;
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goto fail;
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}
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if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u'))
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{
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/* missing second half of the surrogate pair */
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*error_pointer = first_sequence;
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goto fail;
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}
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|
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/* get the second utf16 sequence */
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second_code = parse_hex4(second_sequence + 2);
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/* check that the code is valid */
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if ((second_code < 0xDC00) || (second_code > 0xDFFF))
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{
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/* invalid second half of the surrogate pair */
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*error_pointer = first_sequence;
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goto fail;
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}
|
|
|
|
|
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/* calculate the unicode codepoint from the surrogate pair */
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codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF));
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}
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else
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{
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sequence_length = 6; /* \uXXXX */
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codepoint = first_code;
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}
|
|
|
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/* encode as UTF-8
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* takes at maximum 4 bytes to encode:
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* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
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if (codepoint < 0x80)
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{
|
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/* normal ascii, encoding 0xxxxxxx */
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utf8_length = 1;
|
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}
|
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else if (codepoint < 0x800)
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{
|
|
/* two bytes, encoding 110xxxxx 10xxxxxx */
|
|
utf8_length = 2;
|
|
}
|
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else if (codepoint < 0x10000)
|
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{
|
|
/* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
|
|
utf8_length = 3;
|
|
}
|
|
else if (codepoint <= 0x10FFFF)
|
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{
|
|
/* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */
|
|
utf8_length = 4;
|
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}
|
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else
|
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{
|
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/* invalid unicode codepoint */
|
|
*error_pointer = first_sequence;
|
|
goto fail;
|
|
}
|
|
|
|
/* encode as utf8 */
|
|
switch (utf8_length)
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{
|
|
case 4:
|
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/* 10xxxxxx */
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(*output_pointer)[3] = (unsigned char)((codepoint | 0x80) & 0xBF);
|
|
codepoint >>= 6;
|
|
case 3:
|
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/* 10xxxxxx */
|
|
(*output_pointer)[2] = (unsigned char)((codepoint | 0x80) & 0xBF);
|
|
codepoint >>= 6;
|
|
case 2:
|
|
(*output_pointer)[1] = (unsigned char)((codepoint | 0x80) & 0xBF);
|
|
codepoint >>= 6;
|
|
case 1:
|
|
/* depending on the length in bytes this determines the
|
|
encoding of the first UTF8 byte */
|
|
(*output_pointer)[0] = (unsigned char)((codepoint | firstByteMark[utf8_length]) & 0xFF);
|
|
break;
|
|
default:
|
|
*error_pointer = first_sequence;
|
|
goto fail;
|
|
}
|
|
*output_pointer += utf8_length;
|
|
|
|
return sequence_length;
|
|
|
|
fail:
|
|
return 0;
|
|
}
|
|
|
|
/* Parse the input text into an unescaped cinput, and populate item. */
|
|
static const unsigned char *parse_string(cJSON * const item, const unsigned char * const input, const unsigned char ** const error_pointer)
|
|
{
|
|
const unsigned char *input_pointer = input + 1;
|
|
const unsigned char *input_end = input + 1;
|
|
unsigned char *output_pointer = NULL;
|
|
unsigned char *output = NULL;
|
|
|
|
/* not a string */
|
|
if (*input != '\"')
|
|
{
|
|
*error_pointer = input;
|
|
goto fail;
|
|
}
|
|
|
|
{
|
|
/* calculate approximate size of the output (overestimate) */
|
|
size_t allocation_length = 0;
|
|
size_t skipped_bytes = 0;
|
|
while ((*input_end != '\"') && (*input_end != '\0'))
|
|
{
|
|
/* is escape sequence */
|
|
if (input_end[0] == '\\')
|
|
{
|
|
if (input_end[1] == '\0')
|
|
{
|
|
/* prevent buffer overflow when last input character is a backslash */
|
|
goto fail;
|
|
}
|
|
skipped_bytes++;
|
|
input_end++;
|
|
}
|
|
input_end++;
|
|
}
|
|
if (*input_end == '\0')
|
|
{
|
|
goto fail; /* string ended unexpectedly */
|
|
}
|
|
|
|
/* This is at most how much we need for the output */
|
|
allocation_length = (size_t) (input_end - input) - skipped_bytes;
|
|
output = (unsigned char*)cJSON_malloc(allocation_length + sizeof('\0'));
|
|
if (output == NULL)
|
|
{
|
|
goto fail; /* allocation failure */
|
|
}
|
|
}
|
|
|
|
output_pointer = output;
|
|
/* loop through the string literal */
|
|
while (input_pointer < input_end)
|
|
{
|
|
if (*input_pointer != '\\')
|
|
{
|
|
*output_pointer++ = *input_pointer++;
|
|
}
|
|
/* escape sequence */
|
|
else
|
|
{
|
|
unsigned char sequence_length = 2;
|
|
switch (input_pointer[1])
|
|
{
|
|
case 'b':
|
|
*output_pointer++ = '\b';
|
|
break;
|
|
case 'f':
|
|
*output_pointer++ = '\f';
|
|
break;
|
|
case 'n':
|
|
*output_pointer++ = '\n';
|
|
break;
|
|
case 'r':
|
|
*output_pointer++ = '\r';
|
|
break;
|
|
case 't':
|
|
*output_pointer++ = '\t';
|
|
break;
|
|
case '\"':
|
|
case '\\':
|
|
case '/':
|
|
*output_pointer++ = input_pointer[1];
|
|
break;
|
|
|
|
/* UTF-16 literal */
|
|
case 'u':
|
|
sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer, error_pointer);
|
|
if (sequence_length == 0)
|
|
{
|
|
/* failed to convert UTF16-literal to UTF-8 */
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
*error_pointer = input_pointer;
|
|
goto fail;
|
|
}
|
|
input_pointer += sequence_length;
|
|
}
|
|
}
|
|
|
|
/* zero terminate the output */
|
|
*output_pointer = '\0';
|
|
|
|
item->type = cJSON_String;
|
|
item->valuestring = (char*)output;
|
|
|
|
return input_end + 1;
|
|
|
|
fail:
|
|
if (output != NULL)
|
|
{
|
|
cJSON_free(output);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Render the cstring provided to an escaped version that can be printed. */
|
|
static unsigned char *print_string_ptr(const unsigned char *str, printbuffer *p)
|
|
{
|
|
const unsigned char *ptr = NULL;
|
|
unsigned char *ptr2 = NULL;
|
|
unsigned char *out = NULL;
|
|
size_t len = 0;
|
|
cjbool flag = false;
|
|
unsigned char token = '\0';
|
|
|
|
/* empty string */
|
|
if (!str)
|
|
{
|
|
out = ensure(p, 3);
|
|
if (out == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
strcpy((char*)out, "\"\"");
|
|
|
|
return out;
|
|
}
|
|
|
|
/* set "flag" to 1 if something needs to be escaped */
|
|
for (ptr = str; *ptr; ptr++)
|
|
{
|
|
flag |= (((*ptr > 0) && (*ptr < 32)) /* unprintable characters */
|
|
|| (*ptr == '\"') /* double quote */
|
|
|| (*ptr == '\\')) /* backslash */
|
|
? 1
|
|
: 0;
|
|
}
|
|
/* no characters have to be escaped */
|
|
if (!flag)
|
|
{
|
|
len = (size_t)(ptr - str);
|
|
|
|
out = ensure(p, len + 3);
|
|
if (out == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
ptr2 = out;
|
|
*ptr2++ = '\"';
|
|
strcpy((char*)ptr2, (const char*)str);
|
|
ptr2[len] = '\"';
|
|
ptr2[len + 1] = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
ptr = str;
|
|
/* calculate additional space that is needed for escaping */
|
|
while ((token = *ptr))
|
|
{
|
|
++len;
|
|
if (strchr("\"\\\b\f\n\r\t", token))
|
|
{
|
|
len++; /* +1 for the backslash */
|
|
}
|
|
else if (token < 32)
|
|
{
|
|
len += 5; /* +5 for \uXXXX */
|
|
}
|
|
ptr++;
|
|
}
|
|
|
|
out = ensure(p, len + 3);
|
|
if (out == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
ptr2 = out;
|
|
ptr = str;
|
|
*ptr2++ = '\"';
|
|
/* copy the string */
|
|
while (*ptr)
|
|
{
|
|
if ((*ptr > 31) && (*ptr != '\"') && (*ptr != '\\'))
|
|
{
|
|
/* normal character, copy */
|
|
*ptr2++ = *ptr++;
|
|
}
|
|
else
|
|
{
|
|
/* character needs to be escaped */
|
|
*ptr2++ = '\\';
|
|
switch (token = *ptr++)
|
|
{
|
|
case '\\':
|
|
*ptr2++ = '\\';
|
|
break;
|
|
case '\"':
|
|
*ptr2++ = '\"';
|
|
break;
|
|
case '\b':
|
|
*ptr2++ = 'b';
|
|
break;
|
|
case '\f':
|
|
*ptr2++ = 'f';
|
|
break;
|
|
case '\n':
|
|
*ptr2++ = 'n';
|
|
break;
|
|
case '\r':
|
|
*ptr2++ = 'r';
|
|
break;
|
|
case '\t':
|
|
*ptr2++ = 't';
|
|
break;
|
|
default:
|
|
/* escape and print as unicode codepoint */
|
|
sprintf((char*)ptr2, "u%04x", token);
|
|
ptr2 += 5;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*ptr2++ = '\"';
|
|
*ptr2++ = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Invoke print_string_ptr (which is useful) on an item. */
|
|
static unsigned char *print_string(const cJSON *item, printbuffer *p)
|
|
{
|
|
return print_string_ptr((unsigned char*)item->valuestring, p);
|
|
}
|
|
|
|
/* Predeclare these prototypes. */
|
|
static const unsigned char *parse_value(cJSON * const item, const unsigned char * const input, const unsigned char ** const ep);
|
|
static unsigned char *print_value(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p);
|
|
static const unsigned char *parse_array(cJSON * const item, const unsigned char *input, const unsigned char ** const ep);
|
|
static unsigned char *print_array(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p);
|
|
static const unsigned char *parse_object(cJSON * const item, const unsigned char *input, const unsigned char ** const ep);
|
|
static unsigned char *print_object(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p);
|
|
|
|
/* Utility to jump whitespace and cr/lf */
|
|
static const unsigned char *skip_whitespace(const unsigned char *in)
|
|
{
|
|
while (in && *in && (*in <= 32))
|
|
{
|
|
in++;
|
|
}
|
|
|
|
return in;
|
|
}
|
|
|
|
/* Parse an object - create a new root, and populate. */
|
|
cJSON *cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cjbool require_null_terminated)
|
|
{
|
|
const unsigned char *end = NULL;
|
|
/* use global error pointer if no specific one was given */
|
|
const unsigned char **ep = return_parse_end ? (const unsigned char**)return_parse_end : &global_ep;
|
|
cJSON *c = cJSON_New_Item();
|
|
*ep = NULL;
|
|
if (!c) /* memory fail */
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
end = parse_value(c, skip_whitespace((const unsigned char*)value), ep);
|
|
if (!end)
|
|
{
|
|
/* parse failure. ep is set. */
|
|
cJSON_Delete(c);
|
|
return NULL;
|
|
}
|
|
|
|
/* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
|
|
if (require_null_terminated)
|
|
{
|
|
end = skip_whitespace(end);
|
|
if (*end)
|
|
{
|
|
cJSON_Delete(c);
|
|
*ep = end;
|
|
return NULL;
|
|
}
|
|
}
|
|
if (return_parse_end)
|
|
{
|
|
*return_parse_end = (const char*)end;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
/* Default options for cJSON_Parse */
|
|
cJSON *cJSON_Parse(const char *value)
|
|
{
|
|
return cJSON_ParseWithOpts(value, 0, 0);
|
|
}
|
|
|
|
/* Render a cJSON item/entity/structure to text. */
|
|
char *cJSON_Print(const cJSON *item)
|
|
{
|
|
return (char*)print_value(item, 0, 1, 0);
|
|
}
|
|
|
|
char *cJSON_PrintUnformatted(const cJSON *item)
|
|
{
|
|
return (char*)print_value(item, 0, 0, 0);
|
|
}
|
|
|
|
char *cJSON_PrintBuffered(const cJSON *item, int prebuffer, cjbool fmt)
|
|
{
|
|
printbuffer p;
|
|
|
|
if (prebuffer < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
p.buffer = (unsigned char*)cJSON_malloc((size_t)prebuffer);
|
|
if (!p.buffer)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
p.length = (size_t)prebuffer;
|
|
p.offset = 0;
|
|
p.noalloc = false;
|
|
|
|
return (char*)print_value(item, 0, fmt, &p);
|
|
}
|
|
|
|
int cJSON_PrintPreallocated(cJSON *item, char *buf, const int len, const cjbool fmt)
|
|
{
|
|
printbuffer p;
|
|
|
|
if (len < 0)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
p.buffer = (unsigned char*)buf;
|
|
p.length = (size_t)len;
|
|
p.offset = 0;
|
|
p.noalloc = true;
|
|
return print_value(item, 0, fmt, &p) != NULL;
|
|
}
|
|
|
|
/* Parser core - when encountering text, process appropriately. */
|
|
static const unsigned char *parse_value(cJSON * const item, const unsigned char * const input, const unsigned char ** const error_pointer)
|
|
{
|
|
if (input == NULL)
|
|
{
|
|
return NULL; /* no input */
|
|
}
|
|
|
|
/* parse the different types of values */
|
|
/* null */
|
|
if (!strncmp((const char*)input, "null", 4))
|
|
{
|
|
item->type = cJSON_NULL;
|
|
return input + 4;
|
|
}
|
|
/* false */
|
|
if (!strncmp((const char*)input, "false", 5))
|
|
{
|
|
item->type = cJSON_False;
|
|
return input + 5;
|
|
}
|
|
/* true */
|
|
if (!strncmp((const char*)input, "true", 4))
|
|
{
|
|
item->type = cJSON_True;
|
|
item->valueint = 1;
|
|
return input + 4;
|
|
}
|
|
/* string */
|
|
if (*input == '\"')
|
|
{
|
|
return parse_string(item, input, error_pointer);
|
|
}
|
|
/* number */
|
|
if ((*input == '-') || ((*input >= '0') && (*input <= '9')))
|
|
{
|
|
return parse_number(item, input);
|
|
}
|
|
/* array */
|
|
if (*input == '[')
|
|
{
|
|
return parse_array(item, input, error_pointer);
|
|
}
|
|
/* object */
|
|
if (*input == '{')
|
|
{
|
|
return parse_object(item, input, error_pointer);
|
|
}
|
|
|
|
/* failure. */
|
|
*error_pointer = input;
|
|
return NULL;
|
|
}
|
|
|
|
/* Render a value to text. */
|
|
static unsigned char *print_value(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p)
|
|
{
|
|
unsigned char *out = NULL;
|
|
|
|
if (!item)
|
|
{
|
|
return NULL;
|
|
}
|
|
if (p)
|
|
{
|
|
switch ((item->type) & 0xFF)
|
|
{
|
|
case cJSON_NULL:
|
|
out = ensure(p, 5);
|
|
if (out != NULL)
|
|
{
|
|
strcpy((char*)out, "null");
|
|
}
|
|
break;
|
|
case cJSON_False:
|
|
out = ensure(p, 6);
|
|
if (out != NULL)
|
|
{
|
|
strcpy((char*)out, "false");
|
|
}
|
|
break;
|
|
case cJSON_True:
|
|
out = ensure(p, 5);
|
|
if (out != NULL)
|
|
{
|
|
strcpy((char*)out, "true");
|
|
}
|
|
break;
|
|
case cJSON_Number:
|
|
out = print_number(item, p);
|
|
break;
|
|
case cJSON_Raw:
|
|
{
|
|
size_t raw_length = 0;
|
|
if (item->valuestring == NULL)
|
|
{
|
|
if (!p->noalloc)
|
|
{
|
|
cJSON_free(p->buffer);
|
|
}
|
|
out = NULL;
|
|
break;
|
|
}
|
|
|
|
raw_length = strlen(item->valuestring) + sizeof('\0');
|
|
out = ensure(p, raw_length);
|
|
if (out != NULL)
|
|
{
|
|
memcpy(out, item->valuestring, raw_length);
|
|
}
|
|
break;
|
|
}
|
|
case cJSON_String:
|
|
out = print_string(item, p);
|
|
break;
|
|
case cJSON_Array:
|
|
out = print_array(item, depth, fmt, p);
|
|
break;
|
|
case cJSON_Object:
|
|
out = print_object(item, depth, fmt, p);
|
|
break;
|
|
default:
|
|
out = NULL;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch ((item->type) & 0xFF)
|
|
{
|
|
case cJSON_NULL:
|
|
out = cJSON_strdup((const unsigned char*)"null");
|
|
break;
|
|
case cJSON_False:
|
|
out = cJSON_strdup((const unsigned char*)"false");
|
|
break;
|
|
case cJSON_True:
|
|
out = cJSON_strdup((const unsigned char*)"true");
|
|
break;
|
|
case cJSON_Number:
|
|
out = print_number(item, 0);
|
|
break;
|
|
case cJSON_Raw:
|
|
out = cJSON_strdup((unsigned char*)item->valuestring);
|
|
break;
|
|
case cJSON_String:
|
|
out = print_string(item, 0);
|
|
break;
|
|
case cJSON_Array:
|
|
out = print_array(item, depth, fmt, 0);
|
|
break;
|
|
case cJSON_Object:
|
|
out = print_object(item, depth, fmt, 0);
|
|
break;
|
|
default:
|
|
out = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Build an array from input text. */
|
|
static const unsigned char *parse_array(cJSON * const item, const unsigned char *input, const unsigned char ** const error_pointer)
|
|
{
|
|
cJSON *head = NULL; /* head of the linked list */
|
|
cJSON *current_item = NULL;
|
|
|
|
if (*input != '[')
|
|
{
|
|
/* not an array */
|
|
*error_pointer = input;
|
|
goto fail;
|
|
}
|
|
|
|
input = skip_whitespace(input + 1);
|
|
if (*input == ']')
|
|
{
|
|
/* empty array */
|
|
goto success;
|
|
}
|
|
|
|
/* step back to character in front of the first element */
|
|
input--;
|
|
/* loop through the comma separated array elements */
|
|
do
|
|
{
|
|
/* allocate next item */
|
|
cJSON *new_item = cJSON_New_Item();
|
|
if (new_item == NULL)
|
|
{
|
|
goto fail; /* allocation failure */
|
|
}
|
|
|
|
/* attach next item to list */
|
|
if (head == NULL)
|
|
{
|
|
/* start the linked list */
|
|
current_item = head = new_item;
|
|
}
|
|
else
|
|
{
|
|
/* add to the end and advance */
|
|
current_item->next = new_item;
|
|
new_item->prev = current_item;
|
|
current_item = new_item;
|
|
}
|
|
|
|
/* parse next value */
|
|
input = skip_whitespace(input + 1);
|
|
input = parse_value(current_item, input, error_pointer);
|
|
input = skip_whitespace(input);
|
|
if (input == NULL)
|
|
{
|
|
goto fail; /* failed to parse value */
|
|
}
|
|
}
|
|
while (*input == ',');
|
|
|
|
if (*input != ']')
|
|
{
|
|
*error_pointer = input;
|
|
goto fail; /* expected end of array */
|
|
}
|
|
|
|
success:
|
|
item->type = cJSON_Array;
|
|
item->child = head;
|
|
|
|
return input + 1;
|
|
|
|
fail:
|
|
if (head != NULL)
|
|
{
|
|
cJSON_Delete(head);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Render an array to text */
|
|
static unsigned char *print_array(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p)
|
|
{
|
|
unsigned char **entries;
|
|
unsigned char *out = NULL;
|
|
unsigned char *ptr = NULL;
|
|
unsigned char *ret = NULL;
|
|
size_t len = 5;
|
|
cJSON *child = item->child;
|
|
size_t numentries = 0;
|
|
size_t i = 0;
|
|
cjbool fail = false;
|
|
size_t tmplen = 0;
|
|
|
|
/* How many entries in the array? */
|
|
while (child)
|
|
{
|
|
numentries++;
|
|
child = child->next;
|
|
}
|
|
|
|
/* Explicitly handle numentries == 0 */
|
|
if (!numentries)
|
|
{
|
|
out = ensure(p, 3);
|
|
if (out != NULL)
|
|
{
|
|
strcpy((char*)out, "[]");
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
if (p)
|
|
{
|
|
/* Compose the output array. */
|
|
/* opening square bracket */
|
|
i = p->offset;
|
|
ptr = ensure(p, 1);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
*ptr = '[';
|
|
p->offset++;
|
|
|
|
child = item->child;
|
|
while (child && !fail)
|
|
{
|
|
if (!print_value(child, depth + 1, fmt, p))
|
|
{
|
|
return NULL;
|
|
}
|
|
p->offset = update(p);
|
|
if (child->next)
|
|
{
|
|
len = fmt ? 2 : 1;
|
|
ptr = ensure(p, len + 1);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
*ptr++ = ',';
|
|
if(fmt)
|
|
{
|
|
*ptr++ = ' ';
|
|
}
|
|
*ptr = '\0';
|
|
p->offset += len;
|
|
}
|
|
child = child->next;
|
|
}
|
|
ptr = ensure(p, 2);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
*ptr++ = ']';
|
|
*ptr = '\0';
|
|
out = (p->buffer) + i;
|
|
}
|
|
else
|
|
{
|
|
/* Allocate an array to hold the pointers to all printed values */
|
|
entries = (unsigned char**)cJSON_malloc(numentries * sizeof(unsigned char*));
|
|
if (!entries)
|
|
{
|
|
return NULL;
|
|
}
|
|
memset(entries, '\0', numentries * sizeof(unsigned char*));
|
|
|
|
/* Retrieve all the results: */
|
|
child = item->child;
|
|
while (child && !fail)
|
|
{
|
|
ret = print_value(child, depth + 1, fmt, 0);
|
|
entries[i++] = ret;
|
|
if (ret)
|
|
{
|
|
len += strlen((char*)ret) + 2 + (fmt ? 1 : 0);
|
|
}
|
|
else
|
|
{
|
|
fail = true;
|
|
}
|
|
child = child->next;
|
|
}
|
|
|
|
/* If we didn't fail, try to malloc the output string */
|
|
if (!fail)
|
|
{
|
|
out = (unsigned char*)cJSON_malloc(len);
|
|
}
|
|
/* If that fails, we fail. */
|
|
if (!out)
|
|
{
|
|
fail = true;
|
|
}
|
|
|
|
/* Handle failure. */
|
|
if (fail)
|
|
{
|
|
/* free all the entries in the array */
|
|
for (i = 0; i < numentries; i++)
|
|
{
|
|
if (entries[i])
|
|
{
|
|
cJSON_free(entries[i]);
|
|
}
|
|
}
|
|
cJSON_free(entries);
|
|
return NULL;
|
|
}
|
|
|
|
/* Compose the output array. */
|
|
*out='[';
|
|
ptr = out + 1;
|
|
*ptr = '\0';
|
|
for (i = 0; i < numentries; i++)
|
|
{
|
|
tmplen = strlen((char*)entries[i]);
|
|
memcpy(ptr, entries[i], tmplen);
|
|
ptr += tmplen;
|
|
if (i != (numentries - 1))
|
|
{
|
|
*ptr++ = ',';
|
|
if(fmt)
|
|
{
|
|
*ptr++ = ' ';
|
|
}
|
|
*ptr = '\0';
|
|
}
|
|
cJSON_free(entries[i]);
|
|
}
|
|
cJSON_free(entries);
|
|
*ptr++ = ']';
|
|
*ptr++ = '\0';
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Build an object from the text. */
|
|
static const unsigned char *parse_object(cJSON * const item, const unsigned char *input, const unsigned char ** const error_pointer)
|
|
{
|
|
cJSON *head = NULL; /* linked list head */
|
|
cJSON *current_item = NULL;
|
|
|
|
if (*input != '{')
|
|
{
|
|
*error_pointer = input;
|
|
goto fail; /* not an object */
|
|
}
|
|
|
|
input = skip_whitespace(input + 1);
|
|
if (*input == '}')
|
|
{
|
|
goto success; /* empty object */
|
|
}
|
|
|
|
/* step back to character in front of the first element */
|
|
input--;
|
|
/* loop through the comma separated array elements */
|
|
do
|
|
{
|
|
/* allocate next item */
|
|
cJSON *new_item = cJSON_New_Item();
|
|
if (new_item == NULL)
|
|
{
|
|
goto fail; /* allocation failure */
|
|
}
|
|
|
|
/* attach next item to list */
|
|
if (head == NULL)
|
|
{
|
|
/* start the linked list */
|
|
current_item = head = new_item;
|
|
}
|
|
else
|
|
{
|
|
/* add to the end and advance */
|
|
current_item->next = new_item;
|
|
new_item->prev = current_item;
|
|
current_item = new_item;
|
|
}
|
|
|
|
/* parse the name of the child */
|
|
input = skip_whitespace(input + 1);
|
|
input = parse_string(current_item, input, error_pointer);
|
|
input = skip_whitespace(input);
|
|
if (input == NULL)
|
|
{
|
|
goto fail; /* faile to parse name */
|
|
}
|
|
|
|
/* swap valuestring and string, because we parsed the name */
|
|
current_item->string = current_item->valuestring;
|
|
current_item->valuestring = NULL;
|
|
|
|
if (*input != ':')
|
|
{
|
|
*error_pointer = input;
|
|
goto fail; /* invalid object */
|
|
}
|
|
|
|
/* parse the value */
|
|
input = skip_whitespace(input + 1);
|
|
input = parse_value(current_item, input, error_pointer);
|
|
input = skip_whitespace(input);
|
|
if (input == NULL)
|
|
{
|
|
goto fail; /* failed to parse value */
|
|
}
|
|
}
|
|
while (*input == ',');
|
|
|
|
if (*input != '}')
|
|
{
|
|
*error_pointer = input;
|
|
goto fail; /* expected end of object */
|
|
}
|
|
|
|
success:
|
|
item->type = cJSON_Object;
|
|
item->child = head;
|
|
|
|
return input + 1;
|
|
|
|
fail:
|
|
if (head != NULL)
|
|
{
|
|
cJSON_Delete(head);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Render an object to text. */
|
|
static unsigned char *print_object(const cJSON *item, size_t depth, cjbool fmt, printbuffer *p)
|
|
{
|
|
unsigned char **entries = NULL;
|
|
unsigned char **names = NULL;
|
|
unsigned char *out = NULL;
|
|
unsigned char *ptr = NULL;
|
|
unsigned char *ret = NULL;
|
|
unsigned char *str = NULL;
|
|
size_t len = 7;
|
|
size_t i = 0;
|
|
size_t j = 0;
|
|
cJSON *child = item->child;
|
|
size_t numentries = 0;
|
|
cjbool fail = false;
|
|
size_t tmplen = 0;
|
|
|
|
/* Count the number of entries. */
|
|
while (child)
|
|
{
|
|
numentries++;
|
|
child = child->next;
|
|
}
|
|
|
|
/* Explicitly handle empty object case */
|
|
if (!numentries)
|
|
{
|
|
out = ensure(p, fmt ? depth + 4 : 3);
|
|
if (out == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
ptr = out;
|
|
*ptr++ = '{';
|
|
if (fmt) {
|
|
*ptr++ = '\n';
|
|
for (i = 0; i < depth; i++)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
}
|
|
*ptr++ = '}';
|
|
*ptr++ = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
if (p)
|
|
{
|
|
/* Compose the output: */
|
|
i = p->offset;
|
|
len = fmt ? 2 : 1; /* fmt: {\n */
|
|
ptr = ensure(p, len + 1);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
*ptr++ = '{';
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\n';
|
|
}
|
|
*ptr = '\0';
|
|
p->offset += len;
|
|
|
|
child = item->child;
|
|
depth++;
|
|
while (child)
|
|
{
|
|
if (fmt)
|
|
{
|
|
ptr = ensure(p, depth);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
for (j = 0; j < depth; j++)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
p->offset += depth;
|
|
}
|
|
|
|
/* print key */
|
|
if (!print_string_ptr((unsigned char*)child->string, p))
|
|
{
|
|
return NULL;
|
|
}
|
|
p->offset = update(p);
|
|
|
|
len = fmt ? 2 : 1;
|
|
ptr = ensure(p, len);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
*ptr++ = ':';
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
p->offset+=len;
|
|
|
|
/* print value */
|
|
if (!print_value(child, depth, fmt, p))
|
|
{
|
|
return NULL;
|
|
};
|
|
p->offset = update(p);
|
|
|
|
/* print comma if not last */
|
|
len = (size_t) (fmt ? 1 : 0) + (child->next ? 1 : 0);
|
|
ptr = ensure(p, len + 1);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
if (child->next)
|
|
{
|
|
*ptr++ = ',';
|
|
}
|
|
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\n';
|
|
}
|
|
*ptr = '\0';
|
|
p->offset += len;
|
|
|
|
child = child->next;
|
|
}
|
|
|
|
ptr = ensure(p, fmt ? (depth + 1) : 2);
|
|
if (ptr == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
if (fmt)
|
|
{
|
|
for (i = 0; i < (depth - 1); i++)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
}
|
|
*ptr++ = '}';
|
|
*ptr = '\0';
|
|
out = (p->buffer) + i;
|
|
}
|
|
else
|
|
{
|
|
/* Allocate space for the names and the objects */
|
|
entries = (unsigned char**)cJSON_malloc(numentries * sizeof(unsigned char*));
|
|
if (!entries)
|
|
{
|
|
return NULL;
|
|
}
|
|
names = (unsigned char**)cJSON_malloc(numentries * sizeof(unsigned char*));
|
|
if (!names)
|
|
{
|
|
cJSON_free(entries);
|
|
return NULL;
|
|
}
|
|
memset(entries, '\0', sizeof(unsigned char*) * numentries);
|
|
memset(names, '\0', sizeof(unsigned char*) * numentries);
|
|
|
|
/* Collect all the results into our arrays: */
|
|
child = item->child;
|
|
depth++;
|
|
if (fmt)
|
|
{
|
|
len += depth;
|
|
}
|
|
while (child && !fail)
|
|
{
|
|
names[i] = str = print_string_ptr((unsigned char*)child->string, 0); /* print key */
|
|
entries[i++] = ret = print_value(child, depth, fmt, 0);
|
|
if (str && ret)
|
|
{
|
|
len += strlen((char*)ret) + strlen((char*)str) + 2 + (fmt ? 2 + depth : 0);
|
|
}
|
|
else
|
|
{
|
|
fail = true;
|
|
}
|
|
child = child->next;
|
|
}
|
|
|
|
/* Try to allocate the output string */
|
|
if (!fail)
|
|
{
|
|
out = (unsigned char*)cJSON_malloc(len);
|
|
}
|
|
if (!out)
|
|
{
|
|
fail = true;
|
|
}
|
|
|
|
/* Handle failure */
|
|
if (fail)
|
|
{
|
|
/* free all the printed keys and values */
|
|
for (i = 0; i < numentries; i++)
|
|
{
|
|
if (names[i])
|
|
{
|
|
cJSON_free(names[i]);
|
|
}
|
|
if (entries[i])
|
|
{
|
|
cJSON_free(entries[i]);
|
|
}
|
|
}
|
|
cJSON_free(names);
|
|
cJSON_free(entries);
|
|
return NULL;
|
|
}
|
|
|
|
/* Compose the output: */
|
|
*out = '{';
|
|
ptr = out + 1;
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\n';
|
|
}
|
|
*ptr = '\0';
|
|
for (i = 0; i < numentries; i++)
|
|
{
|
|
if (fmt)
|
|
{
|
|
for (j = 0; j < depth; j++)
|
|
{
|
|
*ptr++='\t';
|
|
}
|
|
}
|
|
tmplen = strlen((char*)names[i]);
|
|
memcpy(ptr, names[i], tmplen);
|
|
ptr += tmplen;
|
|
*ptr++ = ':';
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
strcpy((char*)ptr, (char*)entries[i]);
|
|
ptr += strlen((char*)entries[i]);
|
|
if (i != (numentries - 1))
|
|
{
|
|
*ptr++ = ',';
|
|
}
|
|
if (fmt)
|
|
{
|
|
*ptr++ = '\n';
|
|
}
|
|
*ptr = '\0';
|
|
cJSON_free(names[i]);
|
|
cJSON_free(entries[i]);
|
|
}
|
|
|
|
cJSON_free(names);
|
|
cJSON_free(entries);
|
|
if (fmt)
|
|
{
|
|
for (i = 0; i < (depth - 1); i++)
|
|
{
|
|
*ptr++ = '\t';
|
|
}
|
|
}
|
|
*ptr++ = '}';
|
|
*ptr++ = '\0';
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
/* Get Array size/item / object item. */
|
|
int cJSON_GetArraySize(const cJSON *array)
|
|
{
|
|
cJSON *c = array->child;
|
|
size_t i = 0;
|
|
while(c)
|
|
{
|
|
i++;
|
|
c = c->next;
|
|
}
|
|
|
|
/* FIXME: Can overflow here. Cannot be fixed without breaking the API */
|
|
|
|
return (int)i;
|
|
}
|
|
|
|
cJSON *cJSON_GetArrayItem(const cJSON *array, int item)
|
|
{
|
|
cJSON *c = array ? array->child : NULL;
|
|
while (c && item > 0)
|
|
{
|
|
item--;
|
|
c = c->next;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
cJSON *cJSON_GetObjectItem(const cJSON *object, const char *string)
|
|
{
|
|
cJSON *c = object ? object->child : NULL;
|
|
while (c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string))
|
|
{
|
|
c = c->next;
|
|
}
|
|
return c;
|
|
}
|
|
|
|
cjbool cJSON_HasObjectItem(const cJSON *object, const char *string)
|
|
{
|
|
return cJSON_GetObjectItem(object, string) ? 1 : 0;
|
|
}
|
|
|
|
/* Utility for array list handling. */
|
|
static void suffix_object(cJSON *prev, cJSON *item)
|
|
{
|
|
prev->next = item;
|
|
item->prev = prev;
|
|
}
|
|
|
|
/* Utility for handling references. */
|
|
static cJSON *create_reference(const cJSON *item)
|
|
{
|
|
cJSON *ref = cJSON_New_Item();
|
|
if (!ref)
|
|
{
|
|
return NULL;
|
|
}
|
|
memcpy(ref, item, sizeof(cJSON));
|
|
ref->string = NULL;
|
|
ref->type |= cJSON_IsReference;
|
|
ref->next = ref->prev = NULL;
|
|
return ref;
|
|
}
|
|
|
|
/* Add item to array/object. */
|
|
void cJSON_AddItemToArray(cJSON *array, cJSON *item)
|
|
{
|
|
cJSON *child = NULL;
|
|
|
|
if ((item == NULL) || (array == NULL))
|
|
{
|
|
return;
|
|
}
|
|
|
|
child = array->child;
|
|
|
|
if (child == NULL)
|
|
{
|
|
/* list is empty, start new one */
|
|
array->child = item;
|
|
}
|
|
else
|
|
{
|
|
/* append to the end */
|
|
while (child->next)
|
|
{
|
|
child = child->next;
|
|
}
|
|
suffix_object(child, item);
|
|
}
|
|
}
|
|
|
|
void cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item)
|
|
{
|
|
/* call cJSON_AddItemToObjectCS for code reuse */
|
|
cJSON_AddItemToObjectCS(object, (char*)cJSON_strdup((const unsigned char*)string), item);
|
|
/* remove cJSON_StringIsConst flag */
|
|
item->type &= ~cJSON_StringIsConst;
|
|
}
|
|
|
|
/* Add an item to an object with constant string as key */
|
|
void cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
|
|
{
|
|
if (!item)
|
|
{
|
|
return;
|
|
}
|
|
if (!(item->type & cJSON_StringIsConst) && item->string)
|
|
{
|
|
cJSON_free(item->string);
|
|
}
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wcast-qual"
|
|
item->string = (char*)string;
|
|
#pragma GCC diagnostic pop
|
|
item->type |= cJSON_StringIsConst;
|
|
cJSON_AddItemToArray(object, item);
|
|
}
|
|
|
|
void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)
|
|
{
|
|
cJSON_AddItemToArray(array, create_reference(item));
|
|
}
|
|
|
|
void cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item)
|
|
{
|
|
cJSON_AddItemToObject(object, string, create_reference(item));
|
|
}
|
|
|
|
static cJSON *DetachItemFromArray(cJSON *array, size_t which)
|
|
{
|
|
cJSON *c = array->child;
|
|
while (c && (which > 0))
|
|
{
|
|
c = c->next;
|
|
which--;
|
|
}
|
|
if (!c)
|
|
{
|
|
/* item doesn't exist */
|
|
return NULL;
|
|
}
|
|
if (c->prev)
|
|
{
|
|
/* not the first element */
|
|
c->prev->next = c->next;
|
|
}
|
|
if (c->next)
|
|
{
|
|
c->next->prev = c->prev;
|
|
}
|
|
if (c==array->child)
|
|
{
|
|
array->child = c->next;
|
|
}
|
|
/* make sure the detached item doesn't point anywhere anymore */
|
|
c->prev = c->next = NULL;
|
|
|
|
return c;
|
|
}
|
|
cJSON *cJSON_DetachItemFromArray(cJSON *array, int which)
|
|
{
|
|
if (which < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
return DetachItemFromArray(array, (size_t)which);
|
|
}
|
|
|
|
void cJSON_DeleteItemFromArray(cJSON *array, int which)
|
|
{
|
|
cJSON_Delete(cJSON_DetachItemFromArray(array, which));
|
|
}
|
|
|
|
cJSON *cJSON_DetachItemFromObject(cJSON *object, const char *string)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *c = object->child;
|
|
while (c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string))
|
|
{
|
|
i++;
|
|
c = c->next;
|
|
}
|
|
if (c)
|
|
{
|
|
return DetachItemFromArray(object, i);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void cJSON_DeleteItemFromObject(cJSON *object, const char *string)
|
|
{
|
|
cJSON_Delete(cJSON_DetachItemFromObject(object, string));
|
|
}
|
|
|
|
/* Replace array/object items with new ones. */
|
|
void cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
|
|
{
|
|
cJSON *c = array->child;
|
|
while (c && (which > 0))
|
|
{
|
|
c = c->next;
|
|
which--;
|
|
}
|
|
if (!c)
|
|
{
|
|
cJSON_AddItemToArray(array, newitem);
|
|
return;
|
|
}
|
|
newitem->next = c;
|
|
newitem->prev = c->prev;
|
|
c->prev = newitem;
|
|
if (c == array->child)
|
|
{
|
|
array->child = newitem;
|
|
}
|
|
else
|
|
{
|
|
newitem->prev->next = newitem;
|
|
}
|
|
}
|
|
|
|
static void ReplaceItemInArray(cJSON *array, size_t which, cJSON *newitem)
|
|
{
|
|
cJSON *c = array->child;
|
|
while (c && (which > 0))
|
|
{
|
|
c = c->next;
|
|
which--;
|
|
}
|
|
if (!c)
|
|
{
|
|
return;
|
|
}
|
|
newitem->next = c->next;
|
|
newitem->prev = c->prev;
|
|
if (newitem->next)
|
|
{
|
|
newitem->next->prev = newitem;
|
|
}
|
|
if (c == array->child)
|
|
{
|
|
array->child = newitem;
|
|
}
|
|
else
|
|
{
|
|
newitem->prev->next = newitem;
|
|
}
|
|
c->next = c->prev = NULL;
|
|
cJSON_Delete(c);
|
|
}
|
|
void cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
|
|
{
|
|
if (which < 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
ReplaceItemInArray(array, (size_t)which, newitem);
|
|
}
|
|
|
|
void cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *c = object->child;
|
|
while(c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string))
|
|
{
|
|
i++;
|
|
c = c->next;
|
|
}
|
|
if(c)
|
|
{
|
|
/* free the old string if not const */
|
|
if (!(newitem->type & cJSON_StringIsConst) && newitem->string)
|
|
{
|
|
cJSON_free(newitem->string);
|
|
}
|
|
|
|
newitem->string = (char*)cJSON_strdup((const unsigned char*)string);
|
|
ReplaceItemInArray(object, i, newitem);
|
|
}
|
|
}
|
|
|
|
/* Create basic types: */
|
|
cJSON *cJSON_CreateNull(void)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_NULL;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateTrue(void)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_True;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateFalse(void)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_False;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateBool(cjbool b)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = b ? cJSON_True : cJSON_False;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateNumber(double num)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_Number;
|
|
item->valuedouble = num;
|
|
|
|
/* use saturation in case of overflow */
|
|
if (num >= INT_MAX)
|
|
{
|
|
item->valueint = INT_MAX;
|
|
}
|
|
else if (num <= INT_MIN)
|
|
{
|
|
item->valueint = INT_MIN;
|
|
}
|
|
else
|
|
{
|
|
item->valueint = (int)num;
|
|
}
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateString(const char *string)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_String;
|
|
item->valuestring = (char*)cJSON_strdup((const unsigned char*)string);
|
|
if(!item->valuestring)
|
|
{
|
|
cJSON_Delete(item);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
extern cJSON *cJSON_CreateRaw(const char *raw)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type = cJSON_Raw;
|
|
item->valuestring = (char*)cJSON_strdup((const unsigned char*)raw);
|
|
if(!item->valuestring)
|
|
{
|
|
cJSON_Delete(item);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateArray(void)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if(item)
|
|
{
|
|
item->type=cJSON_Array;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateObject(void)
|
|
{
|
|
cJSON *item = cJSON_New_Item();
|
|
if (item)
|
|
{
|
|
item->type = cJSON_Object;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
/* Create Arrays: */
|
|
cJSON *cJSON_CreateIntArray(const int *numbers, int count)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *n = NULL;
|
|
cJSON *p = NULL;
|
|
cJSON *a = NULL;
|
|
|
|
if (count < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
a = cJSON_CreateArray();
|
|
for(i = 0; a && (i < (size_t)count); i++)
|
|
{
|
|
n = cJSON_CreateNumber(numbers[i]);
|
|
if (!n)
|
|
{
|
|
cJSON_Delete(a);
|
|
return NULL;
|
|
}
|
|
if(!i)
|
|
{
|
|
a->child = n;
|
|
}
|
|
else
|
|
{
|
|
suffix_object(p, n);
|
|
}
|
|
p = n;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
cJSON *cJSON_CreateFloatArray(const float *numbers, int count)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *n = NULL;
|
|
cJSON *p = NULL;
|
|
cJSON *a = NULL;
|
|
|
|
if (count < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
a = cJSON_CreateArray();
|
|
|
|
for(i = 0; a && (i < (size_t)count); i++)
|
|
{
|
|
n = cJSON_CreateNumber(numbers[i]);
|
|
if(!n)
|
|
{
|
|
cJSON_Delete(a);
|
|
return NULL;
|
|
}
|
|
if(!i)
|
|
{
|
|
a->child = n;
|
|
}
|
|
else
|
|
{
|
|
suffix_object(p, n);
|
|
}
|
|
p = n;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
cJSON *cJSON_CreateDoubleArray(const double *numbers, int count)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *n = NULL;
|
|
cJSON *p = NULL;
|
|
cJSON *a = NULL;
|
|
|
|
if (count < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
a = cJSON_CreateArray();
|
|
|
|
for(i = 0;a && (i < (size_t)count); i++)
|
|
{
|
|
n = cJSON_CreateNumber(numbers[i]);
|
|
if(!n)
|
|
{
|
|
cJSON_Delete(a);
|
|
return NULL;
|
|
}
|
|
if(!i)
|
|
{
|
|
a->child = n;
|
|
}
|
|
else
|
|
{
|
|
suffix_object(p, n);
|
|
}
|
|
p = n;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
cJSON *cJSON_CreateStringArray(const char **strings, int count)
|
|
{
|
|
size_t i = 0;
|
|
cJSON *n = NULL;
|
|
cJSON *p = NULL;
|
|
cJSON *a = NULL;
|
|
|
|
if (count < 0)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
a = cJSON_CreateArray();
|
|
|
|
for (i = 0; a && (i < (size_t)count); i++)
|
|
{
|
|
n = cJSON_CreateString(strings[i]);
|
|
if(!n)
|
|
{
|
|
cJSON_Delete(a);
|
|
return NULL;
|
|
}
|
|
if(!i)
|
|
{
|
|
a->child = n;
|
|
}
|
|
else
|
|
{
|
|
suffix_object(p,n);
|
|
}
|
|
p = n;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
/* Duplication */
|
|
cJSON *cJSON_Duplicate(const cJSON *item, cjbool recurse)
|
|
{
|
|
cJSON *newitem = NULL;
|
|
cJSON *child = NULL;
|
|
cJSON *next = NULL;
|
|
cJSON *newchild = NULL;
|
|
|
|
/* Bail on bad ptr */
|
|
if (!item)
|
|
{
|
|
goto fail;
|
|
}
|
|
/* Create new item */
|
|
newitem = cJSON_New_Item();
|
|
if (!newitem)
|
|
{
|
|
goto fail;
|
|
}
|
|
/* Copy over all vars */
|
|
newitem->type = item->type & (~cJSON_IsReference);
|
|
newitem->valueint = item->valueint;
|
|
newitem->valuedouble = item->valuedouble;
|
|
if (item->valuestring)
|
|
{
|
|
newitem->valuestring = (char*)cJSON_strdup((unsigned char*)item->valuestring);
|
|
if (!newitem->valuestring)
|
|
{
|
|
goto fail;
|
|
}
|
|
}
|
|
if (item->string)
|
|
{
|
|
newitem->string = (item->type&cJSON_StringIsConst) ? item->string : (char*)cJSON_strdup((unsigned char*)item->string);
|
|
if (!newitem->string)
|
|
{
|
|
goto fail;
|
|
}
|
|
}
|
|
/* If non-recursive, then we're done! */
|
|
if (!recurse)
|
|
{
|
|
return newitem;
|
|
}
|
|
/* Walk the ->next chain for the child. */
|
|
child = item->child;
|
|
while (child != NULL)
|
|
{
|
|
newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */
|
|
if (!newchild)
|
|
{
|
|
goto fail;
|
|
}
|
|
if (next != NULL)
|
|
{
|
|
/* If newitem->child already set, then crosswire ->prev and ->next and move on */
|
|
next->next = newchild;
|
|
newchild->prev = next;
|
|
next = newchild;
|
|
}
|
|
else
|
|
{
|
|
/* Set newitem->child and move to it */
|
|
newitem->child = newchild;
|
|
next = newchild;
|
|
}
|
|
child = child->next;
|
|
}
|
|
|
|
return newitem;
|
|
|
|
fail:
|
|
if (newitem != NULL)
|
|
{
|
|
cJSON_Delete(newitem);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void cJSON_Minify(char *json)
|
|
{
|
|
unsigned char *into = (unsigned char*)json;
|
|
while (*json)
|
|
{
|
|
if (*json == ' ')
|
|
{
|
|
json++;
|
|
}
|
|
else if (*json == '\t')
|
|
{
|
|
/* Whitespace characters. */
|
|
json++;
|
|
}
|
|
else if (*json == '\r')
|
|
{
|
|
json++;
|
|
}
|
|
else if (*json=='\n')
|
|
{
|
|
json++;
|
|
}
|
|
else if ((*json == '/') && (json[1] == '/'))
|
|
{
|
|
/* double-slash comments, to end of line. */
|
|
while (*json && (*json != '\n'))
|
|
{
|
|
json++;
|
|
}
|
|
}
|
|
else if ((*json == '/') && (json[1] == '*'))
|
|
{
|
|
/* multiline comments. */
|
|
while (*json && !((*json == '*') && (json[1] == '/')))
|
|
{
|
|
json++;
|
|
}
|
|
json += 2;
|
|
}
|
|
else if (*json == '\"')
|
|
{
|
|
/* string literals, which are \" sensitive. */
|
|
*into++ = (unsigned char)*json++;
|
|
while (*json && (*json != '\"'))
|
|
{
|
|
if (*json == '\\')
|
|
{
|
|
*into++ = (unsigned char)*json++;
|
|
}
|
|
*into++ = (unsigned char)*json++;
|
|
}
|
|
*into++ = (unsigned char)*json++;
|
|
}
|
|
else
|
|
{
|
|
/* All other characters. */
|
|
*into++ = (unsigned char)*json++;
|
|
}
|
|
}
|
|
|
|
/* and null-terminate. */
|
|
*into = '\0';
|
|
}
|