status-go/vendor/github.com/anacrolix/torrent/storage/file-misc.go

35 lines
591 B
Go

package storage
import "github.com/anacrolix/torrent/metainfo"
type requiredLength struct {
fileIndex int
length int64
}
func extentCompleteRequiredLengths(info *metainfo.Info, off, n int64) (ret []requiredLength) {
if n == 0 {
return
}
for i, fi := range info.UpvertedFiles() {
if off >= fi.Length {
off -= fi.Length
continue
}
n1 := n
if off+n1 > fi.Length {
n1 = fi.Length - off
}
ret = append(ret, requiredLength{
fileIndex: i,
length: off + n1,
})
n -= n1
if n == 0 {
return
}
off = 0
}
panic("extent exceeds torrent bounds")
}