restruct

restruct is a library for reading and writing binary data in Go. Similar to lunixbochs struc and encoding/binary, this library reads data based on the layout of structures and, like struc, based on what is contained in struct tags.

To install Restruct, use the following command:

go get github.com/go-restruct/restruct

restruct aims to provide a clean, flexible, robust implementation of struct packing. In the future, through fast-path optimizations and code generation, it also aims to be quick, but it is currently very slow.

restruct currently requires Go 1.7+.

Status

As of writing, coverage is hovering around 95%, but more thorough testing is always useful and desirable.
Unpacking and packing are fully functional.
More optimizations are probably possible.

Example

package main

import (
	"encoding/binary"
	"io/ioutil"
	"os"

	"github.com/go-restruct/restruct"
)

type Record struct {
	Message string `struct:"[128]byte"`
}

type Container struct {
	Version   int `struct:"int32"`
	NumRecord int `struct:"int32,sizeof=Records"`
	Records   []Record
}

func main() {
	var c Container

	file, _ := os.Open("records")
	defer file.Close()
	data, _ := ioutil.ReadAll(file)

	restruct.Unpack(data, binary.LittleEndian, &c)
}