Google proto buffer installation and simple example

1 , installation

Download Google Proto Buff .

unzip the downloaded package and read the README.txt , according to the instructions inside the installation.

$./configure

$ make

$ make Check

$ make Install

no accident, the first three steps should be completed smoothly, the fourth step, the need for root permissions. I adopt the default path, so, only with root permissions, or can not install, you must first Create a new Lib under the/usr/local directory, and then perform the make installso that google Proto buffer should be installed successfully .

after the installation, first write a test program to test the installation, first look at Proto File:

Package Hello;

Message Hello

{

Required Int32 id = 1; User ID

Required String name = 2; User name

Optional String email = 3; User Email

}

Next, use Protoc. generate a corresponding class, I generate it in the . /Out in the catalogue:

Protoc Hello.proto--cpp_out=./out

next, in the Out directory, two files are generated :

$> ls

hello.pb.cc Hello.pb.h

Next, write the test C + + Code:

hello.cc

#include <stdio.h>

#include <string.h>

#include "Out/hello.pb.h"

using namespace std;

using namespace Hello;

int main ()

{

Hello A;

A.SET_ID (101);

a.set_name ("xg");

string tmp;

BOOL ret = a.serializetostring (&tmp);

if (ret)

{

printf ("Encode success!\n");

}

Else

{

printf ("Encode faild!\n");

}

Hello b;

RET = b.parsefromstring (TMP);

off (ret)

{

printf ("Decode success!\n id=%d \ n name =%s\n", b.ID (), B.name (). C_STR ());

}

Else

{

printf ("Decode faild!\n");

}

return 0;

}

Next, compile this code, due to the use of Protobuf Library, so when compiling, you should also link these libraries in:

g++ hello.cc./out/hello.pb.cc-o hello-i./out-i/usr/local/protobuf/include-l/usr/local/lib-lprotobuf

In this way, a test program is generated.

Run it:

$>./hello

Encode success!

Decode success!

Id= 101

name = xg

Original

Google proto buffer installation and simple example