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Make Piece a concrete type 

There was a lot of allocations occuring because it was an interface.
This commit is contained in:
Matt Joiner 2015-10-19 01:31:34 +11:00
parent 4b539b1f11
commit 1a4fbed1ac
1 changed files with 6 additions and 12 deletions
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18
metainfo/metainfo.go
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@ -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 {