New Expandable file formats (#95)

iio/wrapper.go

@@ -5,40 +5,6 @@ import (
 	"sync"
 )
 
-type readAtWrapper struct {
-	mu sync.Mutex
-
-	io.ReadSeeker
-	io.ReaderAt
-	io.Closer
-}
-
-func NewReadAtWrapper(r io.ReadSeeker) Reader {
-	return &readAtWrapper{ReadSeeker: r}
-}
-
-func (rw *readAtWrapper) ReadAt(p []byte, off int64) (int, error) {
-	rw.mu.Lock()
-	defer rw.mu.Unlock()
-	_, err := rw.Seek(off, io.SeekStart)
-	if err != nil {
-		return 0, err
-	}
-
-	return io.ReadAtLeast(rw, p, len(p))
-}
-
-func (rw *readAtWrapper) Close() error {
-	rw.mu.Lock()
-	defer rw.mu.Unlock()
-	c, ok := rw.ReadSeeker.(io.Closer)
-	if !ok {
-		return nil
-	}
-
-	return c.Close()
-}
-
 type seekerWrapper struct {
 	mu   sync.Mutex
 	pos  int64

iio/wrapper_test.go

@@ -1,7 +1,6 @@
 package iio_test
 
 import (
-	"bytes"
 	"io"
 	"testing"
 
@@ -12,28 +11,6 @@ import (
 
 var testData []byte = []byte("Hello World")
 
-func TestReadAtWrapper(t *testing.T) {
-	t.Parallel()
-
-	require := require.New(t)
-
-	br := bytes.NewReader(testData)
-
-	r := iio.NewReadAtWrapper(br)
-	defer r.Close()
-
-	toRead := make([]byte, 5)
-	n, err := r.ReadAt(toRead, 6)
-	require.NoError(err)
-	require.Equal(5, n)
-	require.Equal("World", string(toRead))
-
-	n, err = r.ReadAt(toRead, 0)
-	require.NoError(err)
-	require.Equal(5, n)
-	require.Equal("Hello", string(toRead))
-}
-
 func TestSeekerWrapper(t *testing.T) {
 	t.Parallel()