()
| 24 | } |
| 25 | |
| 26 | func (d *Decoder) decodeTypedUint() (Type, uint64, error) { |
| 27 | const ( |
| 28 | maskType = 0xe0 |
| 29 | maskAdditionalInformation = 0x1f |
| 30 | ) |
| 31 | |
| 32 | b, err := d.ReadByte() |
| 33 | if err != nil { |
| 34 | return TypeOther, 0, err |
| 35 | } |
| 36 | |
| 37 | t := Type(b & maskType) |
| 38 | ai := b & maskAdditionalInformation |
| 39 | nfollow := 0 |
| 40 | switch ai { |
| 41 | case 24: |
| 42 | nfollow = 1 |
| 43 | case 25: |
| 44 | nfollow = 2 |
| 45 | case 26: |
| 46 | nfollow = 4 |
| 47 | case 27: |
| 48 | nfollow = 8 |
| 49 | default: |
| 50 | nfollow = 0 |
| 51 | } |
| 52 | |
| 53 | n := uint64(0) |
| 54 | |
| 55 | var follow []byte |
| 56 | if nfollow > 0 { |
| 57 | follow = make([]byte, nfollow) |
| 58 | if _, err := io.ReadFull(d.r, follow); err != nil { |
| 59 | return t, 0, fmt.Errorf("cbor: Failed to read %d bytes following the tag byte: %v", nfollow, err) |
| 60 | } |
| 61 | for i := 0; i < nfollow; i++ { |
| 62 | n = n<<8 | uint64(follow[i]) |
| 63 | } |
| 64 | } else { |
| 65 | n = uint64(ai) |
| 66 | } |
| 67 | |
| 68 | return t, n, nil |
| 69 | } |
| 70 | |
| 71 | func (d *Decoder) decodeOfType(expected Type) (uint64, error) { |
| 72 | t, n, err := d.decodeTypedUint() |
no test coverage detected