func testCodepage(t *testing.T, name string, inReader, outReader func(io.Reader) io.Reader) {
	data := make([]byte, 256)
	for i := range data {
		data[i] = byte(i)
	}
	inr := inReader(bytes.NewBuffer(data))
	r, err := charset.NewReader(name, inr)
	if err != nil {
		t.Fatalf("cannot make reader for charset %q: %v", name, err)
	}
	outr := outReader(r)
	r = outr

	var outbuf bytes.Buffer
	w, err := charset.NewWriter(name, &outbuf)
	if err != nil {
		t.Fatalf("cannot make writer  for charset %q: %v", name, err)
	}
	_, err = io.Copy(w, r)
	if err != nil {
		t.Fatalf("copy failed: %v", err)
	}
	err = w.Close()
	if err != nil {
		t.Fatalf("close failed: %v", err)
	}
	if len(outbuf.Bytes()) != len(data) {
		t.Fatalf("short result of roundtrip, charset %q, readers %T, %T; expected 256, got %d", name, inr, outr, len(outbuf.Bytes()))
	}
	for i, x := range outbuf.Bytes() {
		if data[i] != x {
			t.Fatalf("charset %q, round trip expected %d, got %d", name, i, data[i])
		}
	}
}
func ExampleNewReader() {
	r, err := charset.NewReader("latin1", strings.NewReader("\xa35 for Pepp\xe9"))
	if err != nil {
		log.Fatal(err)
	}
	result, err := ioutil.ReadAll(r)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%s\n", result)
	// Output: £5 for Peppé
}
Exemple #3
0
func main() {
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "usage: tcs [-l] [-v] [charset]\n")
		fmt.Fprintf(os.Stderr, "\ttcs [-f charset] [-t charset] [file]\n")
	}
	flag.Parse()
	if *listFlag {
		cs := ""
		switch flag.NArg() {
		case 1:
			cs = flag.Arg(0)
		case 0:
		default:
			flag.Usage()
		}
		listCharsets(*verboseFlag, cs)
		return
	}
	var f *os.File
	switch flag.NArg() {
	case 0:
		f = os.Stdin
	case 1:
		var err error
		f, err = os.Open(flag.Arg(0))
		if err != nil {
			fatalf("cannot open %q: %v", err)
		}
	}
	r, err := charset.NewReader(*fromCharset, f)
	if err != nil {
		fatalf("cannot translate from %q: %v", *fromCharset, err)
	}
	w, err := charset.NewWriter(*toCharset, os.Stdout)
	if err != nil {
		fatalf("cannot translate to %q: ", err)
	}
	_, err = io.Copy(w, r)
	if err != nil {
		fatalf("%v", err)
	}
}