protowire

This is a binary unmarshaler with wire encoding that I made for learning purposes. DO NOT USE production！ The specification of the wire is as follows

• https://developers.google.com/protocol-buffers/docs/encoding
• https://developers.google.com/protocol-buffers/docs/proto3#scalar

Usage

bin, _ := hex.DecodeString("08b96010b292041801")

type wireMessage struct {
	Int32   int32 `protowire:"1,0,int32,optional"`
	Int64   int64 `protowire:"2,0,int64,optional"`
	Boolean bool  `protowire:"3,0,bool,optional"`
}

var wm wireMessage
protowire.Unmarshal(bin, &wm)

fmt.Printf("%+v", wm)
// -> {Int32:12345 Int64:67890 Boolean:true}

playground: https://play.golang.org/p/tdJvZhdYpcx

Supported type

Type	Meaning	Implemented
0	Varint	int32, int64, uint32, uint64, sint32, sint64, bool, enum
1	64-bit	fixed64, sfixed64, double
2	Length-delimited	string, bytes, embedded messages, packed repeated fields
5	32-bit	fixed32, sfixed32, float

Supported field pattern

• oneof
• optional(The optional in proto3 is passed as an oneof value from the protoc compiler, so if We have already implemented oneof, We have actually implemented the optional.)
• embedded
• packed repeated
• unpacked repeated