(r io.Reader)
| 27 | } |
| 28 | |
| 29 | func (cw *CountingWriter) ReadFrom(r io.Reader) (n int64, err error) { |
| 30 | if rf, ok := cw.w.(io.ReaderFrom); ok { |
| 31 | n, err = rf.ReadFrom(r) |
| 32 | cw.Written += n |
| 33 | return |
| 34 | } |
| 35 | |
| 36 | buf := make([]byte, 32*1024) |
| 37 | n = 0 |
| 38 | for { |
| 39 | var nr int |
| 40 | nr, err = r.Read(buf) |
| 41 | if err != nil { |
| 42 | return |
| 43 | } |
| 44 | |
| 45 | var nw int |
| 46 | nw, err = cw.w.Write(buf[:nr]) |
| 47 | if err != nil { |
| 48 | n += int64(nw) |
| 49 | cw.Written += n |
| 50 | return |
| 51 | } |
| 52 | } |
| 53 | } |