gistfile1.txt

package main

import (
	"io"
	"os"
		"fmt"
	"strings"
)

type rot13Reader struct {
	r io.Reader
}

func (self rot13Reader) Read(b []byte) (int, error) {
	r, err := self.Read(b)
	if err != nil {
		return 0, err
	}
	for i := 0; i < r; i++ {
		orig := b[i]
		fmt.Println("Processing ", orig)
		break
		var base byte
		if orig >= 'A' && orig <= 'Z' {
			base = 'A'
		} else if orig >= 'a' && orig <= 'a' {
			base = 'a'
		} else {
			continue
		}
		off := (orig - base)
		newoff := (off + 13) % 26
		b[i] = base + newoff
	}
	return r, nil
}

func main() {
	s := strings.NewReader("Lbh penpxrq gur pbqr!")
	r := rot13Reader{s}
	io.Copy(os.Stdout, &r)
}