cJSON.h
Alexander Medvednikov
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/*
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Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
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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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#ifndef cJSON__h
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#define cJSON__h
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#if !defined(__WINDOWS__) && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) || defined(_WIN32))
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#define __WINDOWS__
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#endif
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#ifdef __WINDOWS__
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/* When compiling for windows, we specify a specific calling convention to avoid issues where we are being called from a project with a different default calling convention. For windows you have 3 define options:
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CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols
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CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default)
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CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol
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For *nix builds that support visibility attribute, you can define similar behavior by
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setting default visibility to hidden by adding
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-fvisibility=hidden (for gcc)
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or
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-xldscope=hidden (for sun cc)
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to CFLAGS
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then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does
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*/
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#define CJSON_CDECL __cdecl
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#define CJSON_STDCALL __stdcall
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/* export symbols by default, this is necessary for copy pasting the C and header file */
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#if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) && !defined(CJSON_EXPORT_SYMBOLS)
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#define CJSON_EXPORT_SYMBOLS
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#endif
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#if defined(CJSON_HIDE_SYMBOLS)
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#define CJSON_PUBLIC(type) type CJSON_STDCALL
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#elif defined(CJSON_EXPORT_SYMBOLS)
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#define CJSON_PUBLIC(type) __declspec(dllexport) type CJSON_STDCALL
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#elif defined(CJSON_IMPORT_SYMBOLS)
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#define CJSON_PUBLIC(type) __declspec(dllimport) type CJSON_STDCALL
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#endif
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#else /* !__WINDOWS__ */
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#define CJSON_CDECL
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#define CJSON_STDCALL
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#if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined (__SUNPRO_C)) && defined(CJSON_API_VISIBILITY)
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#define CJSON_PUBLIC(type) __attribute__((visibility("default"))) type
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#else
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#define CJSON_PUBLIC(type) type
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#endif
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#endif
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/* project version */
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#define CJSON_VERSION_MAJOR 1
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#define CJSON_VERSION_MINOR 7
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#define CJSON_VERSION_PATCH 12
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#include <stddef.h>
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/* cJSON Types: */
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#define cJSON_Invalid (0)
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#define cJSON_False (1 << 0)
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#define cJSON_True (1 << 1)
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#define cJSON_NULL (1 << 2)
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#define cJSON_Number (1 << 3)
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#define cJSON_String (1 << 4)
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#define cJSON_Array (1 << 5)
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#define cJSON_Object (1 << 6)
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#define cJSON_Raw (1 << 7) /* raw json */
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#define cJSON_IsReference 256
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#define cJSON_StringIsConst 512
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/* The cJSON structure: */
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typedef struct cJSON
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{
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/* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */
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struct cJSON *next;
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struct cJSON *prev;
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/* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */
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struct cJSON *child;
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/* The type of the item, as above. */
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int type;
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/* The item's string, if type==cJSON_String and type == cJSON_Raw */
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char *valuestring;
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/* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */
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int valueint;
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/* The item's number, if type==cJSON_Number */
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double valuedouble;
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/* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
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char *string;
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} cJSON;
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typedef struct cJSON_Hooks
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{
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/* malloc/free are CDECL on Windows regardless of the default calling convention of the compiler, so ensure the hooks allow passing those functions directly. */
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void *(CJSON_CDECL *malloc_fn)(size_t sz);
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void (CJSON_CDECL *free_fn)(void *ptr);
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} cJSON_Hooks;
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typedef int cJSON_bool;
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/* Limits how deeply nested arrays/objects can be before cJSON rejects to parse them.
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* This is to prevent stack overflows. */
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#ifndef CJSON_NESTING_LIMIT
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#define CJSON_NESTING_LIMIT 1000
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#endif
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/* returns the version of cJSON as a string */
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CJSON_PUBLIC(const char*) cJSON_Version(void);
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/* Supply malloc, realloc and free functions to cJSON */
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CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks);
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/* Memory Management: the caller is always responsible to free the results from all variants of cJSON_Parse (with cJSON_Delete) and cJSON_Print (with stdlib free, cJSON_Hooks.free_fn, or cJSON_free as appropriate). The exception is cJSON_PrintPreallocated, where the caller has full responsibility of the buffer. */
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/* Supply a block of JSON, and this returns a cJSON object you can interrogate. */
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CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value);
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/* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */
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/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end will contain a pointer to the error so will match cJSON_GetErrorPtr(). */
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CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated);
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/* Render a cJSON entity to text for transfer/storage. */
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CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item);
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/* Render a cJSON entity to text for transfer/storage without any formatting. */
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CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item);
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/* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */
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CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt);
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/* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */
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/* NOTE: cJSON is not always 100% accurate in estimating how much memory it will use, so to be safe allocate 5 bytes more than you actually need */
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CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format);
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/* Delete a cJSON entity and all subentities. */
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CJSON_PUBLIC(void) cJSON_Delete(cJSON *c);
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/* Returns the number of items in an array (or object). */
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CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array);
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/* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */
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CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index);
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/* Get item "string" from object. Case insensitive. */
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CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string);
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CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string);
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CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string);
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/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */
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CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void);
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/* Check if the item is a string and return its valuestring */
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CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item);
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/* These functions check the type of an item */
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CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item);
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CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item);
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/* These calls create a cJSON item of the appropriate type. */
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CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void);
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CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void);
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CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void);
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CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean);
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CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num);
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CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string);
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/* raw json */
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CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw);
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CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void);
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CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void);
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/* Create a string where valuestring references a string so
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* it will not be freed by cJSON_Delete */
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CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string);
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/* Create an object/arrray that only references it's elements so
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* they will not be freed by cJSON_Delete */
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CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child);
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CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child);
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/* These utilities create an Array of count items. */
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CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count);
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CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count);
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CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count);
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CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char **strings, int count);
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/* Append item to the specified array/object. */
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CJSON_PUBLIC(void) cJSON_AddItemToArray(cJSON *array, cJSON *item);
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CJSON_PUBLIC(void) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
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/* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object.
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* WARNING: When this function was used, make sure to always check that (item->type & cJSON_StringIsConst) is zero before
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* writing to `item->string` */
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CJSON_PUBLIC(void) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item);
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/* Append reference to item to the specified array/object. Use this when you want to add an existing cJSON to a new cJSON, but don't want to corrupt your existing cJSON. */
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CJSON_PUBLIC(void) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
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CJSON_PUBLIC(void) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);
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/* Remove/Detatch items from Arrays/Objects. */
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CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item);
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CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which);
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CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which);
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CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string);
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CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string);
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CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string);
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CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string);
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/* Update array items. */
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CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem); /* Shifts pre-existing items to the right. */
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CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement);
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CJSON_PUBLIC(void) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
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CJSON_PUBLIC(void) cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem);
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CJSON_PUBLIC(void) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object,const char *string,cJSON *newitem);
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/* Duplicate a cJSON item */
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CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse);
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/* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will
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need to be released. With recurse!=0, it will duplicate any children connected to the item.
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The item->next and ->prev pointers are always zero on return from Duplicate. */
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/* Recursively compare two cJSON items for equality. If either a or b is NULL or invalid, they will be considered unequal.
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* case_sensitive determines if object keys are treated case sensitive (1) or case insensitive (0) */
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CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive);
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CJSON_PUBLIC(void) cJSON_Minify(char *json);
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/* Helper functions for creating and adding items to an object at the same time.
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* They return the added item or NULL on failure. */
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CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name);
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CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name);
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CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name);
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CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean);
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CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number);
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CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string);
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CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw);
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CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name);
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CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name);
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/* When assigning an integer value, it needs to be propagated to valuedouble too. */
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#define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number))
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/* helper for the cJSON_SetNumberValue macro */
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CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number);
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#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number))
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/* Macro for iterating over an array or object */
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#define cJSON_ArrayForEach(element, array) for(element = (array != NULL) ? (array)->child : NULL; element != NULL; element = element->next)
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/* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */
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CJSON_PUBLIC(void *) cJSON_malloc(size_t size);
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CJSON_PUBLIC(void) cJSON_free(void *object);
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#ifdef __cplusplus
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}
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#endif
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#endif
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