35 lines
725 B
Go
35 lines
725 B
Go
// Modified UTF-7 encoding defined in RFC 3501 section 5.1.3
|
|
package utf7
|
|
|
|
import (
|
|
"encoding/base64"
|
|
|
|
"golang.org/x/text/encoding"
|
|
)
|
|
|
|
const (
|
|
min = 0x20 // Minimum self-representing UTF-7 value
|
|
max = 0x7E // Maximum self-representing UTF-7 value
|
|
|
|
repl = '\uFFFD' // Unicode replacement code point
|
|
)
|
|
|
|
var b64Enc = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,")
|
|
|
|
type enc struct{}
|
|
|
|
func (e enc) NewDecoder() *encoding.Decoder {
|
|
return &encoding.Decoder{
|
|
Transformer: &decoder{true},
|
|
}
|
|
}
|
|
|
|
func (e enc) NewEncoder() *encoding.Encoder {
|
|
return &encoding.Encoder{
|
|
Transformer: &encoder{},
|
|
}
|
|
}
|
|
|
|
// Encoding is the modified UTF-7 encoding.
|
|
var Encoding encoding.Encoding = enc{}
|