Drop support for go 1.20

[btrtrc.git] / storage / wrappers.go

diff --git a/storage/wrappers.go b/storage/wrappers.go
index aa6c609b1d4d2595ad5d2adf7a8411a68052beb5..a3907e1d2f4ed6a193c1a6cdedd85b9dbabf6e58 100644 (file)
--- a/storage/wrappers.go
+++ b/storage/wrappers.go
@@ -4,7 +4,7 @@ import (
        "io"
        "os"
 
-       "github.com/anacrolix/missinggo"
+       "github.com/anacrolix/missinggo/v2"
 
        "github.com/anacrolix/torrent/metainfo"
 )
@@ -38,14 +38,17 @@ type Piece struct {
        mip metainfo.Piece
 }
 
-func (p Piece) WriteIncompleteTo(w io.Writer) error {
-       if i, ok := p.PieceImpl.(IncompletePieceToWriter); ok {
-               return i.WriteIncompleteTo(w)
+var _ io.WriterTo = Piece{}
+
+// Why do we have this wrapper? Well PieceImpl doesn't implement io.Reader, so we can't let io.Copy
+// and friends check for io.WriterTo and fallback for us since they expect an io.Reader.
+func (p Piece) WriteTo(w io.Writer) (int64, error) {
+       if i, ok := p.PieceImpl.(io.WriterTo); ok {
+               return i.WriteTo(w)
        }
        n := p.mip.Length()
        r := io.NewSectionReader(p, 0, n)
-       _, err := io.CopyN(w, r, n)
-       return err
+       return io.CopyN(w, r, n)
 }
 
 func (p Piece) WriteAt(b []byte, off int64) (n int, err error) {