mirror of https://github.com/ouqiang/gocron
125 lines
2.2 KiB
Go
125 lines
2.2 KiB
Go
package mahonia
|
|
|
|
import (
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// converters for ISO-2022-JP encoding
|
|
|
|
const esc = 27
|
|
|
|
func init() {
|
|
type jpEncoding int
|
|
const (
|
|
ascii jpEncoding = iota
|
|
jisX0201Roman
|
|
jisX0208
|
|
)
|
|
|
|
RegisterCharset(&Charset{
|
|
Name: "ISO-2022-JP",
|
|
NewDecoder: func() Decoder {
|
|
encoding := ascii
|
|
return func(p []byte) (c rune, size int, status Status) {
|
|
if len(p) == 0 {
|
|
return 0, 0, NO_ROOM
|
|
}
|
|
|
|
b := p[0]
|
|
if b == esc {
|
|
if len(p) < 3 {
|
|
return 0, 0, NO_ROOM
|
|
}
|
|
switch p[1] {
|
|
case '(':
|
|
switch p[2] {
|
|
case 'B':
|
|
encoding = ascii
|
|
return 0, 3, STATE_ONLY
|
|
|
|
case 'J':
|
|
encoding = jisX0201Roman
|
|
return 0, 3, STATE_ONLY
|
|
}
|
|
|
|
case '$':
|
|
switch p[2] {
|
|
case '@', 'B':
|
|
encoding = jisX0208
|
|
return 0, 3, STATE_ONLY
|
|
}
|
|
}
|
|
}
|
|
|
|
switch encoding {
|
|
case ascii:
|
|
if b > 127 {
|
|
return utf8.RuneError, 1, INVALID_CHAR
|
|
}
|
|
return rune(b), 1, SUCCESS
|
|
|
|
case jisX0201Roman:
|
|
if b > 127 {
|
|
return utf8.RuneError, 1, INVALID_CHAR
|
|
}
|
|
switch b {
|
|
case '\\':
|
|
return 0xA5, 1, SUCCESS
|
|
case '~':
|
|
return 0x203E, 1, SUCCESS
|
|
}
|
|
return rune(b), 1, SUCCESS
|
|
|
|
case jisX0208:
|
|
return jis0208Table.DecodeLow(p)
|
|
}
|
|
panic("unreachable")
|
|
}
|
|
},
|
|
NewEncoder: func() Encoder {
|
|
jis0208Table.Reverse()
|
|
encoding := ascii
|
|
return func(p []byte, c rune) (size int, status Status) {
|
|
if len(p) == 0 {
|
|
return 0, NO_ROOM
|
|
}
|
|
|
|
if c < 128 {
|
|
if encoding != ascii {
|
|
if len(p) < 4 {
|
|
return 0, NO_ROOM
|
|
}
|
|
p[0], p[1], p[2] = esc, '(', 'B'
|
|
p[3] = byte(c)
|
|
encoding = ascii
|
|
return 4, SUCCESS
|
|
}
|
|
p[0] = byte(c)
|
|
return 1, SUCCESS
|
|
}
|
|
|
|
if c > 65535 {
|
|
return 0, INVALID_CHAR
|
|
}
|
|
jis := jis0208Table.FromUnicode[c]
|
|
if jis == [2]byte{0, 0} && c != rune(jis0208Table.Data[0][0]) {
|
|
return 0, INVALID_CHAR
|
|
}
|
|
|
|
if encoding != jisX0208 {
|
|
if len(p) < 3 {
|
|
return 0, NO_ROOM
|
|
}
|
|
p[0], p[1], p[2] = esc, '$', 'B'
|
|
encoding = jisX0208
|
|
return 3, STATE_ONLY
|
|
}
|
|
|
|
p[0] = jis[0] + 0x21
|
|
p[1] = jis[1] + 0x21
|
|
return 2, SUCCESS
|
|
}
|
|
},
|
|
})
|
|
}
|