eproto

eproto is base on msgpack. support protobuf description file format (.proto). can use in Lua(C++/pure lua),javascript and C#, C++,flutter(dart).eproto是基于msgpack的序列化协议，支持使用protobuf文件格式来定义协议，目前支持的语言有Lua（C++版本高效，纯Lua版本方便），JavaScript，C#，C++，flutter(dart)。

link https://github.com/zhouxingtuan/eproto

How to define a proto

define the proto just the same as protobuf

How to generate a proto file

in the tool directory, run command to gen a pb file:
    lua gen.lua xxx.proto

How to use the lua api

embedded the code into your program, now support with Lua5.1/LuaJIT only:
    eproto.cpp
    eproto.h
use the api follow to register a file:
    eproto.register_file("xxx.pb")
user the api follow to register a buffer from pb file:
    eproto.register(buffer)
encode:
    eproto.encode("packageName.messageName", tab)
decode:
    eproto.decode("packageName.messageName", buffer)
pack:
    eproto.pack(tab)
unpack:
    eproto.unpack(buf)

How to use in javascript

in the tool directory, after run command to gen a pb file, you can find the js file:
	xxx.js
including the xxx.js into your codes, check the example in index.html:
	<script type="text/javascript" src="eproto.js" ></script>
	<script type="text/javascript" src="invitemgr_client.js" ></script>
use the api follow:
	var buf = eproto.encode("packageName.messageName", tab);
	var tab = eproto.decode("packageName.messageName", buf);
	var buf = eproto.pack(tab);
	var tab = eproto.unpack(buf);

How to Use in C#

in the tool directory, after run command to gen a pb file, you can find the cs file:
	xxx.cs
Copy the Eproto.cs and these proto files to your project:
	 WriteBuffer wb = new WriteBuffer();
	 test.request req = new test.request();
	 wb.Clear();
	 req.Encode(wb);
	 byte[] tb = wb.CopyData();
	 // 
	 ReadBuffer rb = new ReadBuffer(tb);
	 req.Decode(rb);

How to Use in C++

in the tool directory, after run command to gen a pb file, you can find the hpp file:
	 xxx.hpp    
Copy eproto.hpp and these proto files to your project, and include them:
	 test::request* req = test::request::New();
	 eproto::Writer wb;
	 wb.clear();
	 req->Encode(wb);
	 //
	 eproto::Reader rb(wb.data(), wb.size());
	 req->Decode(rb);
	 test::request::Delete(req);
You can find some simple test in main.cpp
Note: C++中的message对象采用的是裸指针，需要显式New和Delete，挂载到另一个message里面的message会被连带释放，
	 可以看生成源代码中的Clear函数；由于C++中对数字、字符串、map、vector等没有nil的概念，所以和Lua中的nil
	 会不一致，C++中会给默认值，分别是数字（0）、字符串（空""）、map（空表）、vector（长度为0空数组）。
	 只有message对象使用指针，NULL和nil保持了一致。这里采用了完全public的class模式（类似struct），对新手
	 不友好，容易造成内存泄漏，注意使用。

How to Use in flutter(dart)

in the tool directory, after run command to gen a pb file, you can find the dart file:
 xxx.dart
 Copy eproto.dart and these proto files to your project, and import them. You can use it just like C++.