| 1 | #ifndef CHECKIN_JSON_H |
| 2 | #define CHECKIN_JSON_H 1 |
| 3 | |
| 4 | #if ENABLE_JSONC |
| 5 | #include <json-c/json.h> |
| 6 | // fix an older json-c bug |
| 7 | // https://github.com/json-c/json-c/issues/135 |
| 8 | #ifdef error_description |
| 9 | #undef error_description |
| 10 | #endif // error_description |
| 11 | #endif // ENABLE_JSONC |
| 12 | |
| 13 | #include "libnetdata/json/vendored/jsmn.h" |
| 14 | |
| 15 | //https://www.ibm.com/support/knowledgecenter/en/SS9H2Y_7.6.0/com.ibm.dp.doc/json_parserlimits.html |
| 16 | #define JSON_NAME_LEN 256 |
| 17 | #define JSON_FULLNAME_LEN 1024 |
| 18 | |
| 19 | typedef enum { |
| 20 | JSON_OBJECT = 0, |
| 21 | JSON_ARRAY = 1, |
| 22 | JSON_STRING = 2, |
| 23 | JSON_NUMBER = 3, |
| 24 | JSON_BOOLEAN = 4, |
| 25 | JSON_NULL = 5, |
| 26 | } JSON_ENTRY_TYPE; |
| 27 | |
| 28 | typedef struct json_entry { |
| 29 | JSON_ENTRY_TYPE type; |
| 30 | char name[JSON_NAME_LEN + 1]; |
| 31 | char fullname[JSON_FULLNAME_LEN + 1]; |
| 32 | union { |
| 33 | char *string; // type == JSON_STRING |
| 34 | NETDATA_DOUBLE number; // type == JSON_NUMBER |
| 35 | int boolean; // type == JSON_BOOLEAN |
| 36 | size_t items; // type == JSON_ARRAY |
| 37 | } data; |
| 38 | size_t pos; // the position of this item in its parent |
| 39 | |
| 40 | char *original_string; |
| 41 | |
| 42 | void *callback_data; |
| 43 | int (*callback_function)(struct json_entry *); |
| 44 | } JSON_ENTRY; |
| 45 | |
| 46 | // ---------------------------------------------------------------------------- |
| 47 | // public functions |
| 48 | |
| 49 | #define JSON_OK 0 |
| 50 | #define JSON_CANNOT_DOWNLOAD 1 |
| 51 | #define JSON_CANNOT_PARSE 2 |
| 52 | |
| 53 | int json_parse(char *js, void *callback_data, int (*callback_function)(JSON_ENTRY *)); |
| 54 | |
| 55 | |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | // private functions |
| 58 | |
| 59 | #ifdef ENABLE_JSONC |
| 60 | json_object *json_tokenise(char *js); |
| 61 | size_t json_walk(json_object *t, void *callback_data, int (*callback_function)(struct json_entry *)); |
| 62 | #else |
| 63 | jsmntok_t *json_tokenise(char *js, size_t len, size_t *count); |
| 64 | size_t json_walk_tree(char *js, jsmntok_t *t, void *callback_data, int (*callback_function)(struct json_entry *)); |
| 65 | #endif |
| 66 | |
| 67 | size_t json_walk_object(char *js, jsmntok_t *t, size_t nest, size_t start, JSON_ENTRY *e); |
| 68 | size_t json_walk_array(char *js, jsmntok_t *t, size_t nest, size_t start, JSON_ENTRY *e); |
| 69 | size_t json_walk_string(char *js, jsmntok_t *t, size_t start, JSON_ENTRY *e); |
| 70 | size_t json_walk_primitive(char *js, jsmntok_t *t, size_t start, JSON_ENTRY *e); |
| 71 | |
| 72 | int json_callback_print(JSON_ENTRY *e); |
| 73 | |
| 74 | static inline void cleanup_json_object_pp(struct json_object **jobj) { |
| 75 | if(*jobj) |
| 76 | json_object_put(*jobj); |
| 77 | } |
| 78 | #define CLEAN_JSON_OBJECT _cleanup_(cleanup_json_object_pp) struct json_object |
| 79 | |
| 80 | #endif // CHECKIN_JSON_H |