1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
package mahonia
// Converters for the Shift-JIS encoding.
import (
"unicode/utf8"
)
func init() {
RegisterCharset(&Charset{
Name: "Shift_JIS",
Aliases: []string{"MS_Kanji", "csShiftJIS", "SJIS", "ibm-943", "windows-31j", "cp932", "windows-932"},
NewDecoder: func() Decoder {
return decodeSJIS
},
NewEncoder: func() Encoder {
shiftJISOnce.Do(reverseShiftJISTable)
return encodeSJIS
},
})
}
func decodeSJIS(p []byte) (c rune, size int, status Status) {
if len(p) == 0 {
return 0, 0, NO_ROOM
}
b := p[0]
if b < 0x80 {
return rune(b), 1, SUCCESS
}
if 0xa1 <= b && b <= 0xdf {
return rune(b) + (0xff61 - 0xa1), 1, SUCCESS
}
if b == 0x80 || b == 0xa0 {
return utf8.RuneError, 1, INVALID_CHAR
}
if len(p) < 2 {
return 0, 0, NO_ROOM
}
jis := int(b)<<8 + int(p[1])
c = rune(shiftJISToUnicode[jis])
if c == 0 {
return utf8.RuneError, 2, INVALID_CHAR
}
return c, 2, SUCCESS
}
func encodeSJIS(p []byte, c rune) (size int, status Status) {
if len(p) == 0 {
return 0, NO_ROOM
}
if c < 0x80 {
p[0] = byte(c)
return 1, SUCCESS
}
if 0xff61 <= c && c <= 0xff9f {
// half-width katakana
p[0] = byte(c - (0xff61 - 0xa1))
return 1, SUCCESS
}
if len(p) < 2 {
return 0, NO_ROOM
}
if c > 0xffff {
p[0] = '?'
return 1, INVALID_CHAR
}
jis := unicodeToShiftJIS[c]
if jis == 0 {
p[0] = '?'
return 1, INVALID_CHAR
}
p[0] = byte(jis >> 8)
p[1] = byte(jis)
return 2, SUCCESS
}
|
