Add unfinished reader

rot13reader.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"io"
+	"os"
+	"strings"
+	"fmt"
+)
+
+// TODO: Finish this
+
+type rot13Reader struct {
+	r io.Reader
+}
+
+func (r rot13Reader) Read(b []byte) (int, error) {
+	tmp := make([]byte, 8)
+	n, err := r.Read(tmp)
+	fmt.Println(tmp)
+	if err != nil {
+		return n, err
+	}
+	for i, e := range tmp {
+		b[i] = rot13shift(e)
+	}
+	fmt.Println(b)
+	return n, nil
+}
+
+func rot13shift(b byte) byte {
+	if b >= 'N' && b <= 'Z' {
+		return 'A' + ('N' - b)
+	} else if b >= 'n' && b <= 'z' {
+		return 'a' + ('n' - b)
+	} else if b >= 'A' && b <= 'M' {
+		return 'N' + ('A' - b)
+	} else if b >= 'a' && b <= 'm' {
+		return 'n' + ('a' - b)
+	}
+	return 0
+}
+
+func main() {
+	s := strings.NewReader("Lbh penpxrq gur pbqr!")
+	r := rot13Reader{s}
+	io.Copy(os.Stdout, &r)
+}