func (s staticFileNode) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
if req.Offset > int64(len(s)) {
return nil
}
s = s[req.Offset:]
size := req.Size
if size > len(s) {
size = len(s)
}
res.Data = make([]byte, size)
copy(res.Data, s)
return nil
}
func (s *stat) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
c := s.content()
if req.Offset > int64(len(c)) {
return nil
}
c = c[req.Offset:]
size := req.Size
if size > len(c) {
size = len(c)
}
res.Data = make([]byte, size)
copy(res.Data, c)
return nil
}
func (h *mutFileHandle) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
if h.tmp == nil {
log.Printf("Read called on camli mutFileHandle without a tempfile set")
return fuse.EIO
}
buf := make([]byte, req.Size)
n, err := h.tmp.ReadAt(buf, req.Offset)
if err == io.EOF {
err = nil
}
if err != nil {
log.Printf("mutFileHandle.Read: %v", err)
return fuse.EIO
}
res.Data = buf[:n]
return nil
}
func (nr *nodeReader) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
log.Printf("CAMLI nodeReader READ on %v: %#v", nr.n.blobref, req)
if req.Offset >= nr.fr.Size() {
return nil
}
size := req.Size
if int64(size)+req.Offset >= nr.fr.Size() {
size -= int((int64(size) + req.Offset) - nr.fr.Size())
}
buf := make([]byte, size)
n, err := nr.fr.ReadAt(buf, req.Offset)
if err == io.EOF {
err = nil
}
if err != nil {
log.Printf("camli read on %v at %d: %v", nr.n.blobref, req.Offset, err)
return fuse.EIO
}
res.Data = buf[:n]
return nil
}
func (nr *nodeReader) Read(req *fuse.ReadRequest, res *fuse.ReadResponse, intr fuse.Intr) fuse.Error {
log.Printf("CAMLI nodeReader READ on %v: %#v", nr.n.blobref, req)
// TODO: this isn't incredibly efficient, creating a new
// FileReader for each read chunk. We could do better here
// and re-use a locked pool of readers, trying to find the one
// with a current offset <= req.Offset first.
fr, err := nr.ss.NewFileReader(nr.n.fs.fetcher)
if err != nil {
panic(err)
}
fr.Skip(uint64(req.Offset))
buf := make([]byte, req.Size)
n, err := fr.Read(buf)
if err != nil && err != io.EOF {
log.Printf("camli read on %v at %d: %v", nr.n.blobref, req.Offset, err)
return fuse.EIO
}
res.Data = buf[:n]
return nil
}