Fixedwidth is a Go package that provides a simple way to define fixed-width data, fast encoding and decoding also is the project's target.
UTF-8
To start using Fixedwidth, run go get:
$ go get github.com/huydang284/fixedwidth
To limit a struct field, we use fixed tag.
Example:
type people struct {
Name string `fixed:"10"`
Age int `fixed:"3"`
}If the value of struct field is longer than the limit that we defined, redundant characters will be truncated.
Otherwise, if the value of struct field is less than the limit, additional spaces will be appended.
We can use Marshal function directly to encode fixed-width data.
package main
import (
"fmt"
"github.com/huydang284/fixedwidth"
)
type people struct {
Name string `fixed:"10"`
Age int `fixed:"3"`
}
func main() {
me := people {
Name: "Huy",
Age: 25,
}
data, _ := fixedwidth.Marshal(me)
fmt.Println(string(data))
}The result will be:
Huy 25
For decoding, we use Unmarshal.
package main
import (
"fmt"
"github.com/huydang284/fixedwidth"
)
type people struct {
Name string `fixed:"10"`
Age int `fixed:"3"`
}
func main() {
var me people
data := []byte("Huy 25 ")
fixedwidth.Unmarshal(data, &me)
fmt.Printf("%+v", me)
}The result will be:
{Name:Huy Age:25}
Huy Dang ([email protected])
Fixedwidth source code is available under the MIT License.