autojson Main Page

autojson is a JSON parser base on the automaton provided by json.org

Two interfaces are provided: C and C++. The C interface is a simple and basic callback interface: client code call JSON_checker_char() to input JSON data, the parser will call the callback function provided as argument of JSON_checker_char() when it encounters any events. Events are described by its type JSON_event.

The C interface is provided by the JSON_checker.h header. The main functions to be used are JSON_checker_char() and new_JSON_checker().

The C++ interface is still a work in progress.

autojson is hosted in Github

Getting Started with the C Interface

Getting Started with the C++ Interface

struct Subject
{
    std::string value;
    int in;
    struct Sub
    {
        std::string v2;
    } sub;
};

Subject j {};
const char js[] =
"{"
    "\"haha\": \"fun\","
    "\"hehe\": 199"
"}";

JsonParser p(
    ObjectReactor<Subject>().
        Map("haha", &Subject::value).
        Map("hehe", &Subject::in),
    j);
p.Parse(js, sizeof(js)-1);

In the above example, there are a few class involved:

• JsonParser: the parser class that controls the parsing.
• ObjectReactor: a Reactor class that maps the key in the object to a member variable.
• Destination: it's the Subject class here. It is the class that stores the output of the JSON parser.