main.cpp

//
//  main.cpp
//  FlatBufferDemo
//
//  Created by derek on 2018/12/16.
//  Copyright © 2018 derek. All rights reserved.
//

#include <iostream>

#include "Layer_Fb_generated.h"
#include "idl.h"

using namespace std;

flatbuffers::FlatBufferBuilder build_data;

void serialize() {
    
    // super
    auto position_fb = Layer::CreatePoint_Fb(build_data, 1, 1);
    auto super_fb = Layer::CreateNode_Fb(build_data, build_data.CreateString("father"), position_fb);
    
    // friend
    auto friend_fb = Layer::CreateNode_Fb(build_data, build_data.CreateString("tom"), Layer::CreatePoint_Fb(build_data, 2, 2));
    
    // children
    std::vector<flatbuffers::Offset<Layer::Node_Fb>> nodeVector;
    auto child1 = Layer::CreateNode_Fb(build_data, build_data.CreateString("son"), Layer::CreatePoint_Fb(build_data, 3, 3));
    auto child2 = Layer::CreateNode_Fb(build_data, build_data.CreateString("daughter"), Layer::CreatePoint_Fb(build_data, 4, 4));
    nodeVector.push_back(child1);
    nodeVector.push_back(child2);
    
    auto children_fb = build_data.CreateVector(nodeVector);
    
    // layer
    auto layer_fb = Layer::CreateLayer_Fb(build_data, super_fb, friend_fb, children_fb);
    build_data.Finish(layer_fb);
    
    cout<<"serialize size:"<<build_data.GetSize()<<endl;
}

void deserialize() {
    
    // load binary file
    std::string binaryfile;
    bool ok = flatbuffers::LoadFile("layer.bin", false, &binaryfile);
    if (!ok) {
        return;
    }
    
    
    flatbuffers::FlatBufferBuilder builder_out;
    builder_out.PushBytes(reinterpret_cast<unsigned char*>(const_cast<char*>(binaryfile.c_str())), binaryfile.size());
    cout<<"deserialize size:"<<build_data.GetSize()<<endl;
    
    // verify
    flatbuffers::Verifier layer_verify(builder_out.GetCurrentBufferPointer(), build_data.GetSize());
    bool verify_flag = Layer::VerifyLayer_FbBuffer(layer_verify);
    if (!verify_flag) {
        return;
    }
    
    // read
    auto layer_fb = Layer::GetLayer_Fb(builder_out.GetCurrentBufferPointer());
    
    cout<<"father name:"+layer_fb->super()->name()->str()<<endl;
    cout<<"friend name:"+layer_fb->friend_()->name()->str()<<endl;
    
    for (int i=0; i<layer_fb->children()->Length(); i++) {
        string name = layer_fb->children()->Get(i)->name()->str();
        cout<<"child "<<i<<":"+name<<endl;
    }
    
}

int main(int argc, const char * argv[]) {
    // insert code here...
   
    // 序列化
    serialize();
    
    flatbuffers::SaveFile("layer.bin", reinterpret_cast<char*>(build_data.GetBufferPointer()), build_data.GetSize(), true);
    
    // 反序列化
    deserialize();
    
    return 0;
}