13 // 20-byte SHA1 hash used for info and pieces.
16 var _ fmt.Formatter = (*T)(nil)
18 func (t T) Format(f fmt.State, c rune) {
19 // TODO: I can't figure out a nice way to just override the 'x' rune, since it's meaningless
20 // with the "default" 'v', or .String() already returning the hex.
21 f.Write([]byte(t.HexString()))
24 func (t T) Bytes() []byte {
28 func (t T) AsString() string {
32 func (t T) String() string {
36 func (t T) HexString() string {
37 return fmt.Sprintf("%x", t[:])
40 func (t *T) FromHexString(s string) (err error) {
42 err = fmt.Errorf("hash hex string has bad length: %d", len(s))
45 n, err := hex.Decode(t[:], []byte(s))
56 _ encoding.TextUnmarshaler = (*T)(nil)
57 _ encoding.TextMarshaler = T{}
60 func (t *T) UnmarshalText(b []byte) error {
61 return t.FromHexString(string(b))
64 func (t T) MarshalText() (text []byte, err error) {
65 return []byte(t.HexString()), nil
68 func FromHexString(s string) (h T) {
69 err := h.FromHexString(s)
76 func HashBytes(b []byte) (ret T) {
79 copy(ret[:], hasher.Sum(nil))
83 func HashBytesV2(b []byte) (ret T) {
84 hasher := sha256.New()
86 copy(ret[:], hasher.Sum(nil))