90 lines
1.7 KiB
Go
90 lines
1.7 KiB
Go
package torrent
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"github.com/anacrolix/torrent/metainfo"
|
|
)
|
|
|
|
// Provides access to regions of torrent data that correspond to its files.
|
|
type File struct {
|
|
t Torrent
|
|
path string
|
|
offset int64
|
|
length int64
|
|
fi metainfo.FileInfo
|
|
}
|
|
|
|
func (f *File) Torrent() Torrent {
|
|
return f.t
|
|
}
|
|
|
|
// Data for this file begins this far into the torrent.
|
|
func (f *File) Offset() int64 {
|
|
return f.offset
|
|
}
|
|
|
|
func (f File) FileInfo() metainfo.FileInfo {
|
|
return f.fi
|
|
}
|
|
|
|
func (f File) Path() string {
|
|
return f.path
|
|
}
|
|
|
|
func (f *File) Length() int64 {
|
|
return f.length
|
|
}
|
|
|
|
// The relative file path for a multi-file torrent, and the torrent name for a
|
|
// single-file torrent.
|
|
func (f *File) DisplayPath() string {
|
|
fip := f.FileInfo().Path
|
|
if len(fip) == 0 {
|
|
return f.t.Info().Name
|
|
}
|
|
return strings.Join(fip, "/")
|
|
|
|
}
|
|
|
|
type FilePieceState struct {
|
|
Bytes int64 // Bytes within the piece that are part of this File.
|
|
PieceState
|
|
}
|
|
|
|
// Returns the state of pieces in this file.
|
|
func (f *File) State() (ret []FilePieceState) {
|
|
pieceSize := int64(f.t.usualPieceSize())
|
|
off := f.offset % pieceSize
|
|
remaining := f.length
|
|
for i := int(f.offset / pieceSize); ; i++ {
|
|
if remaining == 0 {
|
|
break
|
|
}
|
|
len1 := pieceSize - off
|
|
if len1 > remaining {
|
|
len1 = remaining
|
|
}
|
|
f.t.cl.mu.RLock()
|
|
ps := f.t.pieceState(i)
|
|
f.t.cl.mu.RUnlock()
|
|
ret = append(ret, FilePieceState{len1, ps})
|
|
off = 0
|
|
remaining -= len1
|
|
}
|
|
return
|
|
}
|
|
|
|
// Marks pieces in the region of the file for download. This is a helper
|
|
// wrapping Torrent.SetRegionPriority.
|
|
func (f *File) PrioritizeRegion(off, len int64) {
|
|
if off < 0 || off >= f.length {
|
|
return
|
|
}
|
|
if off+len > f.length {
|
|
len = f.length - off
|
|
}
|
|
off += f.offset
|
|
f.t.SetRegionPriority(off, len)
|
|
}
|