tape: Encoder inherits bufio.Writer, need to do same for decoder

tape/encode.go

@@ -2,6 +2,7 @@ package tape
 
 import "io"
 import "math"
+import "bufio"
 
 // Encodable is any type that can write itself to an encoder.
 type Encodable interface {
@@ -10,14 +11,16 @@ type Encodable interface {
 	Encode(encoder *Encoder) (n int, err error)
 }
 	
-// Encoder wraps an [io.Writer] and encodes data to it.
+// Encoder encodes data to an io.Writer.
 type Encoder struct {
-	io.Writer
+	bufio.Writer
 }
 
-// WriteByte encodes a single byte to the output writer.
-func (this *Encoder) WriteByte(value byte) (n int, err error) {
-	return this.WriteByte(uint8(value))
+// NewEncoder creates a new encoder that writes to writer.
+func NewEncoder(writer io.Writer) *Encoder {
+	encoder := &Encoder { }
+	encoder.Reset(writer)
+	return encoder
 }
 
 // WriteInt8 encodes an 8-bit signed integer to the output writer.