From: Matt Joiner <anacrolix@gmail.com>
Date: Wed, 4 Mar 2015 02:03:47 +0000 (+1100)
Subject: Add Piece.Offset
X-Git-Tag: v1.0.0~1199^2
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=ceabaaaeb22e94bcb1e252dcef575edde5464296;p=btrtrc.git

Add Piece.Offset
---

diff --git a/metainfo/metainfo.go b/metainfo/metainfo.go
index 872407b4..a9a6e009 100644
--- a/metainfo/metainfo.go
+++ b/metainfo/metainfo.go
@@ -64,6 +64,7 @@ func (me *Info) NumPieces() int {
 type Piece interface {
 	Hash() []byte
 	Length() int64
+	Offset() int64
 }
 
 type piece struct {
@@ -78,6 +79,10 @@ func (me piece) Length() int64 {
 	return me.Info.PieceLength
 }
 
+func (me piece) Offset() int64 {
+	return int64(me.i) * me.Info.PieceLength
+}
+
 func (me piece) Hash() []byte {
 	return me.Info.Pieces[me.i*20 : (me.i+1)*20]
 }