c_json_parse

A JSON parser built in C.

Functionality

parse_json(FILE * fp)

Accepts a path to a file pointer to a .json file and returns a fully parsed JSON data structure (if valid).

add_to_object(struct JSON_OBJECT *item, struct JSON_OBJECT **head)

This function accepts an (allocated) JSON_OBJECT whose fields have been pre-assigned by the user and appends it to the end of a given JSON_OBJECT.

Note that in order to append an item to a nested JSON_OBJECT value, the user should supply the (void *) value pointed to by a JSON_OBJECT whose type is NESTED_VALUE. See below for more information.

Accessing the JSON Object

In order to access a JSON_OBJECT returned by "parse_json_from_filename", it is recommended to refer to the member field "type" for any given JSON_OBJECT node, which indicates how much memory has been allocated to a given JSON_OBJECT node's property "value".

The user can use these values as they would an enum. Example pseudocode can be found below for a function that traverses a JSON_OBJECT, printing a node only if it is of the type "STRING_VALUE":

void traverse_json(struct JSON_OBJECT *my_json_object_ptr) {
 if (my_json_object_ptr->type == NESTED_VALUE) {
 traverse_json(my_json_object_ptr->val);
 } else if (my_json_object_ptr->type == STRING_VALUE) {
 print_key_value_pair(my_json_object_ptr->key, my_json_object_ptr->val);
 }
}