谷歌 Google ProtoBuf用法實例

這裏貼一個介紹貼http://blog.csdn.net/hailong0715/article/details/52016682

這裏就介紹怎麼安裝的了，安裝caffe的時候一起安裝的，這裏介紹一下怎麼用這個庫，caffe用他來當數據傳輸說明他很快

新建一個proto定義數據傳輸的結構，這個和ros上數據傳輸很像

syntax = “proto2”;
package caffe; //域名
message Person {
  required string name = 1;
  required int32 age = 2;
  optional string email = 3;

  enum PhoneType {
    MOBILE = 0;
    HOME = 1;
    WORK = 2;
  }

  message PhoneNumber {
    required string number = 1;
    optional PhoneType type = 2 [default = HOME];
  }

  optional PhoneNumber phone = 4;

}

syntax = "proto2";
package caffe; //域名
message Person {  
  required string name = 1;  
  required int32 age = 2;  
  optional string email = 3;  

  enum PhoneType {  
    MOBILE = 0;  
    HOME = 1;  
    WORK = 2;  
  }  

  message PhoneNumber {  
    required string number = 1;  
    optional PhoneType type = 2 [default = HOME];  
  }  

  optional PhoneNumber phone = 4; 

}  

package 指的是域名，就是std一樣

write.cpp

#include <iostream>
#include <fstream>
#include “caffe.pb.h”

using namespace std;
using namespace caffe;

int main()
{
    Person person;

    person.set_name(”flamingo”);
    person.set_age(18);
    person.set_email(”[email protected]”);
    person.mutable_phone()->set_number(”135525”);

    // Write
    fstream output(”./log”, ios::out | ios::trunc | ios::binary);

    if (!person.SerializeToOstream(&output)) {
        cerr << ”Failed to write msg.” << endl;
        return -1;
    }

    //system(“pause”);
    return 0;
}

#include <iostream>  

include <fstream>

include "caffe.pb.h"

using namespace std;
using namespace caffe;

int main()
{
Person person;

person.set_name("flamingo");     
person.set_age(18);   
person.set_email("[email protected]");  
person.mutable_phone()->set_number("135525");

// Write  
fstream output("./log", ios::out | ios::trunc | ios::binary);  

if (!person.SerializeToOstream(&output)) {  
    cerr << "Failed to write msg." << endl;  
    return -1;  
}  

//system("pause");  
return 0;  

}

上面的修改其實我是看他生產的caffe.pb.h裏面定義的函數，發現有這些函數可以直接用的

read.cpp

#include <iostream>
#include <fstream>
#include “caffe.pb.h”


using namespace std;
using namespace caffe;

void PrintInfo(const Person & person) {
    cout << person.name() << endl;
    cout << person.age() << endl;
    cout << person.email() << endl;
    cout << person.phone().number() << endl;
    cout << person.phone().type() << endl;

}

int main()
{
    Person person;

    fstream input(”./log”, ios::in | ios::binary);

    if (!person.ParseFromIstream(&input)) {
        cerr << ”Failed to parse address book.” << endl;
        return -1;
    }

    PrintInfo(person);

    return 0;
}

#include <iostream>  

#include <fstream> #include "caffe.pb.h" using namespace std; using namespace caffe; void PrintInfo(const Person & person) { cout << person.name() << endl; cout << person.age() << endl; cout << person.email() << endl; cout << person.phone().number() << endl; cout << person.phone().type() << endl; } int main() { Person person; fstream input("./log", ios::in | ios::binary); if (!person.ParseFromIstream(&input)) { cerr << "Failed to parse address book." << endl; return -1; } PrintInfo(person); return 0; }

然後編譯，加入庫就好了

protoc –cpp_out=./ caffe.proto   #在當前目錄生成.h和.cc
g++ write.cpp caffe.pb.cc -o write -lprotobuf
g++ read.cpp caffe.pb.cc -o read -lprotobuf

protoc --cpp_out=./ caffe.proto   #在當前目錄生成.h和.cc
g++ write.cpp caffe.pb.cc -o write -lprotobuf
g++ read.cpp caffe.pb.cc -o read -lprotobuf

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