1 /* 2 Copyright (c) 2009-2017 Dave Gamble and cJSON contributors 3 Permission is hereby granted, free of charge, to any person obtaining a copy 4 of this software and associated documentation files (the "Software"), to deal 5 in the Software without restriction, including without limitation the rights 6 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 copies of the Software, and to permit persons to whom the Software is 8 furnished to do so, subject to the following conditions: 9 The above copyright notice and this permission notice shall be included in 10 all copies or substantial portions of the Software. 11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 12 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 14 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 15 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 16 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 17 THE SOFTWARE. 18 */ 19 20 #ifndef cJSON__h 21 #define cJSON__h 22 23 #ifdef __cplusplus 24 extern "C" 25 { 26 #endif 27 28 #if !defined(__WINDOWS__) && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) || defined(_WIN32)) 29 #define __WINDOWS__ 30 #endif 31 32 #ifdef __WINDOWS__ 33 34 /* 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: 35 CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols 36 CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default) 37 CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol 38 For *nix builds that support visibility attribute, you can define similar behavior by 39 setting default visibility to hidden by adding 40 -fvisibility=hidden (for gcc) 41 or 42 -xldscope=hidden (for sun cc) 43 to CFLAGS 44 then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does 45 */ 46 47 #define CJSON_CDECL __cdecl 48 #define CJSON_STDCALL __stdcall 49 50 /* export symbols by default, this is necessary for copy pasting the C and header file */ 51 #if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) && !defined(CJSON_EXPORT_SYMBOLS) 52 #define CJSON_EXPORT_SYMBOLS 53 #endif 54 55 #if defined(CJSON_HIDE_SYMBOLS) 56 #define CJSON_PUBLIC(type) type CJSON_STDCALL 57 #elif defined(CJSON_EXPORT_SYMBOLS) 58 #define CJSON_PUBLIC(type) __declspec(dllexport) type CJSON_STDCALL 59 #elif defined(CJSON_IMPORT_SYMBOLS) 60 #define CJSON_PUBLIC(type) __declspec(dllimport) type CJSON_STDCALL 61 #endif 62 #else /* !__WINDOWS__ */ 63 #define CJSON_CDECL 64 #define CJSON_STDCALL 65 66 #if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined (__SUNPRO_C)) && defined(CJSON_API_VISIBILITY) 67 #define CJSON_PUBLIC(type) __attribute__((visibility("default"))) type 68 #else 69 #define CJSON_PUBLIC(type) type 70 #endif 71 #endif 72 73 /* project version */ 74 #define CJSON_VERSION_MAJOR 1 75 #define CJSON_VERSION_MINOR 7 76 #define CJSON_VERSION_PATCH 12 77 78 #include <stddef.h> 79 80 /* cJSON Types: */ 81 #define cJSON_Invalid (0) 82 #define cJSON_False (1 << 0) 83 #define cJSON_True (1 << 1) 84 #define cJSON_NULL (1 << 2) 85 #define cJSON_Number (1 << 3) 86 #define cJSON_String (1 << 4) 87 #define cJSON_Array (1 << 5) 88 #define cJSON_Object (1 << 6) 89 #define cJSON_Raw (1 << 7) /* raw json */ 90 91 #define cJSON_IsReference 256 92 #define cJSON_StringIsConst 512 93 94 /* The cJSON structure: */ 95 typedef struct cJSON 96 { 97 /* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */ 98 struct cJSON *next; 99 struct cJSON *prev; 100 /* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */ 101 struct cJSON *child; 102 103 /* The type of the item, as above. */ 104 int type; 105 106 /* The item's string, if type==cJSON_String and type == cJSON_Raw */ 107 char *valuestring; 108 /* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */ 109 int valueint; 110 /* The item's number, if type==cJSON_Number */ 111 double valuedouble; 112 113 /* The item's name string, if this item is the child of, or is in the list of subitems of an object. */ 114 char *string; 115 } cJSON; 116 117 typedef struct cJSON_Hooks 118 { 119 /* malloc/free are CDECL on Windows regardless of the default calling convention of the compiler, so ensure the hooks allow passing those functions directly. */ 120 void *(CJSON_CDECL *malloc_fn)(size_t sz); 121 void (CJSON_CDECL *free_fn)(void *ptr); 122 } cJSON_Hooks; 123 124 typedef int cJSON_bool; 125 126 /* Limits how deeply nested arrays/objects can be before cJSON rejects to parse them. 127 * This is to prevent stack overflows. */ 128 #ifndef CJSON_NESTING_LIMIT 129 #define CJSON_NESTING_LIMIT 1000 130 #endif 131 132 /* returns the version of cJSON as a string */ 133 CJSON_PUBLIC(const char*) cJSON_Version(void); 134 135 /* Supply malloc, realloc and free functions to cJSON */ 136 CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks); 137 138 /* 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. */ 139 /* Supply a block of JSON, and this returns a cJSON object you can interrogate. */ 140 CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value); 141 /* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */ 142 /* 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(). */ 143 CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated); 144 145 /* Render a cJSON entity to text for transfer/storage. */ 146 CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item); 147 /* Render a cJSON entity to text for transfer/storage without any formatting. */ 148 CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item); 149 /* 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 */ 150 CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt); 151 /* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */ 152 /* 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 */ 153 CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format); 154 /* Delete a cJSON entity and all subentities. */ 155 CJSON_PUBLIC(void) cJSON_Delete(cJSON *c); 156 157 /* Returns the number of items in an array (or object). */ 158 CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array); 159 /* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */ 160 CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index); 161 /* Get item "string" from object. Case insensitive. */ 162 CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string); 163 CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string); 164 CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string); 165 /* 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. */ 166 CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void); 167 168 /* Check if the item is a string and return its valuestring */ 169 CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item); 170 171 /* These functions check the type of an item */ 172 CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item); 173 CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item); 174 CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item); 175 CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item); 176 CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item); 177 CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item); 178 CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item); 179 CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item); 180 CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item); 181 CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item); 182 183 /* These calls create a cJSON item of the appropriate type. */ 184 CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void); 185 CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void); 186 CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void); 187 CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean); 188 CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num); 189 CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string); 190 /* raw json */ 191 CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw); 192 CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void); 193 CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void); 194 195 /* Create a string where valuestring references a string so 196 * it will not be freed by cJSON_Delete */ 197 CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string); 198 /* Create an object/arrray that only references it's elements so 199 * they will not be freed by cJSON_Delete */ 200 CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child); 201 CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child); 202 203 /* These utilities create an Array of count items. */ 204 CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count); 205 CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count); 206 CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count); 207 CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char **strings, int count); 208 209 /* Append item to the specified array/object. */ 210 CJSON_PUBLIC(void) cJSON_AddItemToArray(cJSON *array, cJSON *item); 211 CJSON_PUBLIC(void) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item); 212 /* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object. 213 * WARNING: When this function was used, make sure to always check that (item->type & cJSON_StringIsConst) is zero before 214 * writing to `item->string` */ 215 CJSON_PUBLIC(void) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item); 216 /* 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. */ 217 CJSON_PUBLIC(void) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item); 218 CJSON_PUBLIC(void) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item); 219 220 /* Remove/Detatch items from Arrays/Objects. */ 221 CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item); 222 CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which); 223 CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which); 224 CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string); 225 CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string); 226 CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string); 227 CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string); 228 229 /* Update array items. */ 230 CJSON_PUBLIC(void) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem); /* Shifts pre-existing items to the right. */ 231 CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement); 232 CJSON_PUBLIC(void) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem); 233 CJSON_PUBLIC(void) cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem); 234 CJSON_PUBLIC(void) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object,const char *string,cJSON *newitem); 235 236 /* Duplicate a cJSON item */ 237 CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse); 238 /* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will 239 need to be released. With recurse!=0, it will duplicate any children connected to the item. 240 The item->next and ->prev pointers are always zero on return from Duplicate. */ 241 /* Recursively compare two cJSON items for equality. If either a or b is NULL or invalid, they will be considered unequal. 242 * case_sensitive determines if object keys are treated case sensitive (1) or case insensitive (0) */ 243 CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive); 244 245 246 CJSON_PUBLIC(void) cJSON_Minify(char *json); 247 248 /* Helper functions for creating and adding items to an object at the same time. 249 * They return the added item or NULL on failure. */ 250 CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name); 251 CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name); 252 CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name); 253 CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean); 254 CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number); 255 CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string); 256 CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw); 257 CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name); 258 CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name); 259 260 /* When assigning an integer value, it needs to be propagated to valuedouble too. */ 261 #define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number)) 262 /* helper for the cJSON_SetNumberValue macro */ 263 CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number); 264 #define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number)) 265 266 /* Macro for iterating over an array or object */ 267 #define cJSON_ArrayForEach(element, array) for(element = (array != NULL) ? (array)->child : NULL; element != NULL; element = element->next) 268 269 /* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */ 270 CJSON_PUBLIC(void *) cJSON_malloc(size_t size); 271 CJSON_PUBLIC(void) cJSON_free(void *object); 272 273 #ifdef __cplusplus 274 } 275 #endif 276 277 #endif 278