1 /* 2 Copyright (c) 2009 Dave Gamble 3 4 Permission is hereby granted, free of charge, to any person obtaining a copy 5 of this software and associated documentation files (the "Software"), to deal 6 in the Software without restriction, including without limitation the rights 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 copies of the Software, and to permit persons to whom the Software is 9 furnished to do so, subject to the following conditions: 10 11 The above copyright notice and this permission notice shall be included in 12 all copies or substantial portions of the Software. 13 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 THE SOFTWARE. 21 */ 22 23 #ifndef cJSON__h 24 #define cJSON__h 25 26 #ifdef __cplusplus 27 extern "C" 28 { 29 #endif 30 31 /* cJSON Types: */ 32 #define cJSON_False 0 33 #define cJSON_True 1 34 #define cJSON_NULL 2 35 #define cJSON_Number 3 36 #define cJSON_String 4 37 #define cJSON_Array 5 38 #define cJSON_Object 6 39 40 #define cJSON_IsReference 256 41 42 typedef struct cJSON_PoolBlock { 43 struct cJSON_PoolBlock * next; 44 45 /* Not visible here, however the allocation system 46 will allocate this structure along with all the 47 elements at once, where the elements will follow 48 this structure */ 49 } cJSON_PoolBlock; 50 51 typedef struct cJSON_Pool { 52 /* linked list of allocation blocks */ 53 cJSON_PoolBlock * blocks; 54 55 /* the number of references to this pool */ 56 unsigned int refcount; 57 58 /* linked list of available cJSON allocations */ 59 struct cJSON * free_items; 60 } cJSON_Pool; 61 62 /* The cJSON structure: */ 63 typedef struct cJSON { 64 struct cJSON *next,*prev; /* next/prev allow you to walk 65 array/object 66 chains. Alternatively, use 67 GetArraySize/GetArrayItem/GetObjectItem */ 68 struct cJSON *child; /* An array or object item will have a 69 child pointer pointing to a chain of 70 the items in the array/object. */ 71 72 int type; /* The type of the item, as above. */ 73 74 char *valuestring; /* The item's string, if type==cJSON_String */ 75 int valueint; /* The item's number, if type==cJSON_Number */ 76 double valuedouble; /* The item's number, if type==cJSON_Number */ 77 78 char *string; /* The item's name string, if this item is the 79 child of, or is in the list of subitems of an 80 object. */ 81 82 struct cJSON_Pool *alloc_pool; 83 } cJSON; 84 85 typedef struct cJSON_Hooks { 86 void *(*malloc_fn)(size_t sz); 87 void (*free_fn)(void *ptr); 88 } cJSON_Hooks; 89 90 /* Supply malloc, realloc and free functions to cJSON */ 91 extern void cJSON_InitHooks(cJSON_Hooks* hooks); 92 93 94 /* Supply a block of JSON, and this returns a cJSON object you can 95 interrogate. Call cJSON_Delete when finished. */ 96 extern cJSON *cJSON_Parse(const char *value); 97 /* Render a cJSON entity to text for transfer/storage. Free the char* 98 when finished. */ 99 extern char *cJSON_Print(cJSON *item); 100 /* Render a cJSON entity to text for transfer/storage without any 101 formatting. Free the char* when finished. */ 102 extern char *cJSON_PrintUnformatted(cJSON *item); 103 /* Delete a cJSON entity and all subentities. */ 104 extern void cJSON_Delete(cJSON *c); 105 106 /* Returns the number of items in an array (or object). */ 107 extern int cJSON_GetArraySize(cJSON *array); 108 /* Retrieve item number "item" from array "array". Returns NULL if 109 unsuccessful. */ 110 extern cJSON *cJSON_GetArrayItem(cJSON *array,int item); 111 /* Get item "string" from object. Case insensitive. */ 112 extern cJSON *cJSON_GetObjectItem(cJSON *object,const char *string); 113 114 /* These calls create a cJSON item of the appropriate type. */ 115 extern cJSON *cJSON_CreateNull(void); 116 extern cJSON *cJSON_CreateTrue(void); 117 extern cJSON *cJSON_CreateFalse(void); 118 extern cJSON *cJSON_CreateNumber(double num); 119 extern cJSON *cJSON_CreateString(const char *string); 120 extern cJSON *cJSON_CreateArray(void); 121 extern cJSON *cJSON_CreateObject(void); 122 123 /* These utilities create an Array of count items. */ 124 extern cJSON *cJSON_CreateIntArray(int *numbers,int count); 125 extern cJSON *cJSON_CreateFloatArray(float *numbers,int count); 126 extern cJSON *cJSON_CreateDoubleArray(double *numbers,int count); 127 extern cJSON *cJSON_CreateStringArray(const char **strings,int count); 128 129 /* Append item to the specified array/object. */ 130 extern void cJSON_AddItemToArray(cJSON *array, cJSON *item); 131 extern void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item); 132 /* Append reference to item to the specified array/object. Use this 133 when you want to add an existing cJSON to a new cJSON, but don't 134 want to corrupt your existing cJSON. */ 135 extern void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item); 136 extern void cJSON_AddItemReferenceToObject(cJSON *object,const char *string,cJSON *item); 137 138 /* Remove/Detatch items from Arrays/Objects. */ 139 extern cJSON *cJSON_DetachItemFromArray(cJSON *array,int which); 140 extern void cJSON_DeleteItemFromArray(cJSON *array,int which); 141 extern cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string); 142 extern void cJSON_DeleteItemFromObject(cJSON *object,const char *string); 143 144 /* Update array items. */ 145 extern void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem); 146 extern void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem); 147 148 #define cJSON_AddNullToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateNull()) 149 #define cJSON_AddTrueToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateTrue()) 150 #define cJSON_AddFalseToObject(object,name) cJSON_AddItemToObject(object, name, cJSON_CreateFalse()) 151 #define cJSON_AddNumberToObject(object,name,n) cJSON_AddItemToObject(object, name, cJSON_CreateNumber(n)) 152 #define cJSON_AddStringToObject(object,name,s) cJSON_AddItemToObject(object, name, cJSON_CreateString(s)) 153 154 #ifdef __cplusplus 155 } 156 #endif 157 158 #endif 159