CODEWITHSUNDEEP
c++boost
PepperTiger
PepperTiger

Reputation: 604

How to unserialize a binary file into an object?

I used this method to serialize my object :

void save(Obj& obj) {
    ofstream os("obj.dat", ofstream::binary);
    boost::archive::binary_oarchive ar(os, boost::archive::no_header);
    ar << boost::serialization::make_binary_object(&obj, sizeof(obj));
}

What would be my the code for my Obj load(string fileName) ?

Upvotes: 1

Views: 118

Answers (1)

sehe
sehe

Reputation: 393114

It's basically the same as what you had:

Obj load(std::string const& filename) {
    std::ifstream is(filename, std::ios::binary);
    boost::archive::binary_iarchive ar(is, boost::archive::no_header);
    Obj obj;
    ar >> boost::serialization::make_binary_object(&obj, sizeof(obj));
    return obj;
}

Of course, this is assuming that your type is valid for use with make_binary_object: make sure that Obj is bitwise serializable (POD):

    static_assert(std::is_pod<Obj>::value, "Obj is not POD");

Also, reconsider using namespace: Why is "using namespace std;" considered bad practice?

Upvotes: 1

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