64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package multibase
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import (
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"fmt"
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)
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// Encoder is a multibase encoding that is verified to be supported and
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// supports an Encode method that does not return an error
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type Encoder struct {
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enc Encoding
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}
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// NewEncoder create a new Encoder from an Encoding
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func NewEncoder(base Encoding) (Encoder, error) {
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_, ok := EncodingToStr[base]
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if !ok {
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return Encoder{-1}, fmt.Errorf("Unsupported multibase encoding: %d", base)
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}
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return Encoder{base}, nil
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}
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// MustNewEncoder is like NewEncoder but will panic if the encoding is
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// invalid.
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func MustNewEncoder(base Encoding) Encoder {
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_, ok := EncodingToStr[base]
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if !ok {
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panic("Unsupported multibase encoding")
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}
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return Encoder{base}
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}
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// EncoderByName creates an encoder from a string, the string can
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// either be the multibase name or single character multibase prefix
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func EncoderByName(str string) (Encoder, error) {
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var base Encoding
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ok := true
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if len(str) == 0 {
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return Encoder{-1}, fmt.Errorf("Empty multibase encoding")
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} else if len(str) == 1 {
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base = Encoding(str[0])
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_, ok = EncodingToStr[base]
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} else {
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base, ok = Encodings[str]
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}
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if !ok {
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return Encoder{-1}, fmt.Errorf("Unsupported multibase encoding: %s", str)
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}
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return Encoder{base}, nil
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}
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func (p Encoder) Encoding() Encoding {
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return p.enc
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}
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// Encode encodes the multibase using the given Encoder.
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func (p Encoder) Encode(data []byte) string {
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str, err := Encode(p.enc, data)
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if err != nil {
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// should not happen
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panic(err)
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}
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return str
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}
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