Make Piece a concrete type

There was a lot of allocations occuring because it was an interface.

diff --git a/metainfo/metainfo.go b/metainfo/metainfo.go
index ce3246a5bf092fc727b41183137971aa4f75d6e0..47fe7de6fa34b6325b8aec0337ebefbae9ed8521 100644 (file)
--- a/metainfo/metainfo.go
+++ b/metainfo/metainfo.go
@@ -61,34 +61,28 @@ func (me *Info) NumPieces() int {
        return len(me.Pieces) / 20
 }
 
-type Piece interface {
-       Hash() []byte
-       Length() int64
-       Offset() int64
-}
-
-type piece struct {
+type Piece struct {
        Info *Info
        i    int
 }
 
-func (me piece) Length() int64 {
+func (me Piece) Length() int64 {
        if me.i == me.Info.NumPieces()-1 {
                return me.Info.TotalLength() - int64(me.i)*me.Info.PieceLength
        }
        return me.Info.PieceLength
 }
 
-func (me piece) Offset() int64 {
+func (me Piece) Offset() int64 {
        return int64(me.i) * me.Info.PieceLength
 }
 
-func (me piece) Hash() []byte {
+func (me Piece) Hash() []byte {
        return me.Info.Pieces[me.i*20 : (me.i+1)*20]
 }
 
-func (me *Info) Piece(i int) piece {
-       return piece{me, i}
+func (me *Info) Piece(i int) Piece {
+       return Piece{me, i}
 }
 
 func (i *Info) IsDir() bool {