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package mahonia
// Converters for the Shift-JIS encoding.
import (
"sync"
)
func init() {
RegisterCharset(&Charset{
Name: "Shift_JIS",
Aliases: []string{"MS_Kanji", "csShiftJIS", "SJIS"},
NewDecoder: func() Decoder {
sjisOnce.Do(makeSjisTable)
return sjisTable.Decoder()
},
NewEncoder: func() Encoder {
sjisOnce.Do(makeSjisTable)
return sjisTable.Encoder()
},
})
}
var sjisOnce sync.Once
var sjisTable MBCSTable
func makeSjisTable() {
var b [2]byte
for jis0208, unicode := range jis0208ToUnicode {
if unicode == 0 {
continue
}
j1 := byte(jis0208 >> 8)
j2 := byte(jis0208)
if j1 < 95 {
b[0] = (j1+1)/2 + 112
} else {
b[0] = (j1+1)/2 + 176
}
if j1&1 == 1 {
b[1] = j2 + 31
if j2 >= 96 {
b[1]++
}
} else {
b[1] = j2 + 126
}
sjisTable.AddCharacter(rune(unicode), string(b[:]))
}
for jis0201, unicode := range jis0201ToUnicode {
if unicode == 0 {
continue
}
sjisTable.AddCharacter(rune(unicode), string(byte(jis0201)))
}
for i := '\x00'; i < 32; i++ {
sjisTable.AddCharacter(i, string(byte(i)))
}
sjisTable.AddCharacter(0x7f, "\x7f")
}
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