| 43 | } |
| 44 | |
| 45 | func (c *Compression) UnmarshalText(b []byte) error { |
| 46 | switch string(b) { |
| 47 | case "none", "uncompressed": |
| 48 | *c = None |
| 49 | return nil |
| 50 | } |
| 51 | |
| 52 | for _, codec := range Codecs[None+1:] { |
| 53 | if codec.Name() == string(b) { |
| 54 | *c = Compression(codec.Code()) |
| 55 | return nil |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | i, err := strconv.ParseInt(string(b), 10, 64) |
| 60 | if err == nil && i >= 0 && i < int64(len(Codecs)) { |
| 61 | *c = Compression(i) |
| 62 | return nil |
| 63 | } |
| 64 | |
| 65 | s := &strings.Builder{} |
| 66 | s.WriteString("none, uncompressed") |
| 67 | |
| 68 | for i, codec := range Codecs[None+1:] { |
| 69 | if i < (len(Codecs) - 1) { |
| 70 | s.WriteString(", ") |
| 71 | } else { |
| 72 | s.WriteString(", or ") |
| 73 | } |
| 74 | s.WriteString(codec.Name()) |
| 75 | } |
| 76 | |
| 77 | return fmt.Errorf("compression format must be one of %s, not %q", s, b) |
| 78 | } |
| 79 | |
| 80 | var ( |
| 81 | _ encoding.TextMarshaler = Compression(0) |