elct9620 / interview-skywatch-msgpack

The interview for Skywatch

(Interview) Skywatch Msgpack

This is Skywatch Interview Assignment to implement a msgpack encoder.

Usage

Install package

go get https://github.com/elct9620/interview-skywatch-msgpack

Include package to encode from json or struct

package main

import (
	"fmt"

	"github.com/elct9620/interview-skywatch-msgpack/pkg/msgpack"
)

func main() {
	data, _ := msgpack.Marshal(map[string]int{"count": 10})
	fmt.Printf("From Map: %v\n", data)

	data, _ = msgpack.FromJSON([]byte(`{"count": 10}`))
	fmt.Printf("From JSON: %v\n", data)
}

Capability

Type	Supported
nil	✅
true	✅
false	✅
positive fixint	✅
negative fixint	✅
uint8	✅
uint16	✅
uint32	✅
uint64	✅
int8	✅
int16	✅
int32	✅
int64	✅
float32	✅
float64	✅
fixstr	✅
str8	✅
str16	✅
str32	✅
fixarray	✅
array16	✅
array32	✅
fixmap	✅
map16	✅
map32	✅
bin8	❌
bin16	❌
bin32	❌
fixext1	❌
fixext2	❌
fixext4	❌
fixext8	❌
fixext16	❌
ext8	❌
ext16	❌
ext32	❌

Limitation

Unoptimized Size

For example, the JSON to Msgpack never uses float32 because json.Unmarshal will use float64 by default in Go

The behavior is follow by msgpack playground generated data from JSON

No strict type check

The package may overflow or use incorrect type due to the implementation only checking it by the reflect package but no more checks.

No bin and ext support

The JSON didn't support the bin or ext without extra configuration therefore not implement it.