如何将结构从V8 C++函数返回到javascript模块

Question

我是Javascript和V8库的新手.我的要求是调用C++函数并将C结构返回给Javascript模块.

struct empDetails {
    int empNo;
    string empName;
};

v8::Handle<v8::Value> getDetails(const v8::Arguments &args) {
    if ((args.Length() != 1) || !args[0]->IsUint32()) {
        return v8::ThrowException(v8::Exception::Error    
                (v8::String::New("Invalid> arguments.")));
    }
    uint32_t userId = args[0]->ToUint32()->Value();
    empDetails e;
    company::GetEmpdetails(userId, e); // other static function in my project
    return e;
}

在return语句中,我收到错误.谁能告诉我如何从V8 C++函数返回一个结构.

Answer 1

您想要创建Javascript对象并使用您的数据填充它的每个成员.

#define function(name) v8::Handle<v8::Value> name(const v8::Arguments& a)

    function (example_object) {
        v8::HandleScope handle_scope;
        Handle<Object> Result = Object::New();
        Result->Set(String::New("name"), String::New("Stackoverflow"));
        Result->Set(String::New("url"), String::New("http://stackoverflow.com"));
        Result->Set(String::New("javascript_tagged"), Number::New(317566));
        return handle_scope.Close(Result);
    }

从Javascript调用:

log(JSON.stringify(example_object()))

产量

{"name":"Stackoverflow","url":"http://stackoverflow.com","javascript_tagged":317566}