1. 準備與安裝

軟體包：protobuf-2.6.1.zip, protobuf-c-master.zip

apt-get install pkg-config

unzip protobuf-2.6.1.zip
./configure --prefix=/usr/ 
make 
make install

unzip protobuf-c-master.zip
./configure --prefix=/usr/ 
make 
make install

2. 安裝驗證

cd protobuf-c-master/t
protoc-c --c_out=./ test.proto //無報錯則說明安裝成功

3. 測試demo

3.1 編寫proto檔案

vim UserInfo.proto

enum UserStatus {
UNKNOWN = 0;
IDLE = 1;
BUSY = 2;
}

message UserInfo {
required string name = 1;
required uint32 age = 2;
optional string phone = 3;
required UserStatus stat = 4;
optional string email = 5;
}

3.2 使用命令protoc-c 將proto檔案進行匯出.c和.h檔案

protoc-c --c_out=./ UserInfo.proto

3.3 編寫main.c

#include "UserInfo.pb-c.h"
#include <stdio.h>
int main()
{
        uint8_t buffer[1024] = {0};
        UserInfo user;
        user_info__init(&user);
        user.name = "dabai";
        user.age = 18;
        user.stat = USER_STATUS__IDLE;

        size_t length = user_info__pack(&user, buffer);

        UserInfo *userInfo =  user_info__unpack(NULL, length, buffer);
        if(!userInfo){
                printf("user_information__unpack is fail!!!\n");
                return -1;
        }
        printf("Unpack: %s %d %d\n", userInfo->name, userInfo->age, userInfo->stat);
        user_info__free_unpacked(userInfo, NULL);

        return 0;
}

3.4 編譯與執行　　

gcc main.c UserInfo.pb-c.c -I ./ -lprotobuf-c -o main
./main
Unpack: dabai 18 1