sjis.go

package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"os"

	"golang.org/x/text/encoding/japanese"
	"golang.org/x/text/transform"
)

// Reads and prints ShiftJIS file.
func main() {
	flag.Parse()
	f, err := os.OpenFile(flag.Arg(0), os.O_RDONLY, 0600)
	if err != nil {
		log.Fatal(err)
	}
	defer f.Close()

	r := transform.NewReader(f, japanese.ShiftJIS.NewDecoder())
	b, err := ioutil.ReadAll(r)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Print(string(b))
}