/usr/share/gocode/src/golang.org/x/text/encoding/traditionalchinese/big5.go is in golang-golang-x-text-dev 0.0~git20170627.0.6353ef0-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | // Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package traditionalchinese
import (
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// All is a list of all defined encodings in this package.
var All = []encoding.Encoding{Big5}
// Big5 is the Big5 encoding, also known as Code Page 950.
var Big5 encoding.Encoding = &big5
var big5 = internal.Encoding{
&internal.SimpleEncoding{big5Decoder{}, big5Encoder{}},
"Big5",
identifier.Big5,
}
type big5Decoder struct{ transform.NopResetter }
func (big5Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size, s := rune(0), 0, ""
loop:
for ; nSrc < len(src); nSrc += size {
switch c0 := src[nSrc]; {
case c0 < utf8.RuneSelf:
r, size = rune(c0), 1
case 0x81 <= c0 && c0 < 0xff:
if nSrc+1 >= len(src) {
if !atEOF {
err = transform.ErrShortSrc
break loop
}
r, size = utf8.RuneError, 1
goto write
}
c1 := src[nSrc+1]
switch {
case 0x40 <= c1 && c1 < 0x7f:
c1 -= 0x40
case 0xa1 <= c1 && c1 < 0xff:
c1 -= 0x62
case c1 < 0x40:
r, size = utf8.RuneError, 1
goto write
default:
r, size = utf8.RuneError, 2
goto write
}
r, size = '\ufffd', 2
if i := int(c0-0x81)*157 + int(c1); i < len(decode) {
if 1133 <= i && i < 1167 {
// The two-rune special cases for LATIN CAPITAL / SMALL E WITH CIRCUMFLEX
// AND MACRON / CARON are from http://encoding.spec.whatwg.org/#big5
switch i {
case 1133:
s = "\u00CA\u0304"
goto writeStr
case 1135:
s = "\u00CA\u030C"
goto writeStr
case 1164:
s = "\u00EA\u0304"
goto writeStr
case 1166:
s = "\u00EA\u030C"
goto writeStr
}
}
r = rune(decode[i])
if r == 0 {
r = '\ufffd'
}
}
default:
r, size = utf8.RuneError, 1
}
write:
if nDst+utf8.RuneLen(r) > len(dst) {
err = transform.ErrShortDst
break loop
}
nDst += utf8.EncodeRune(dst[nDst:], r)
continue loop
writeStr:
if nDst+len(s) > len(dst) {
err = transform.ErrShortDst
break loop
}
nDst += copy(dst[nDst:], s)
continue loop
}
return nDst, nSrc, err
}
type big5Encoder struct{ transform.NopResetter }
func (big5Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
for ; nSrc < len(src); nSrc += size {
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
size = 1
if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = uint8(r)
nDst++
continue
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
break
}
}
}
if r >= utf8.RuneSelf {
// func init checks that the switch covers all tables.
switch {
case encode0Low <= r && r < encode0High:
if r = rune(encode0[r-encode0Low]); r != 0 {
goto write2
}
case encode1Low <= r && r < encode1High:
if r = rune(encode1[r-encode1Low]); r != 0 {
goto write2
}
case encode2Low <= r && r < encode2High:
if r = rune(encode2[r-encode2Low]); r != 0 {
goto write2
}
case encode3Low <= r && r < encode3High:
if r = rune(encode3[r-encode3Low]); r != 0 {
goto write2
}
case encode4Low <= r && r < encode4High:
if r = rune(encode4[r-encode4Low]); r != 0 {
goto write2
}
case encode5Low <= r && r < encode5High:
if r = rune(encode5[r-encode5Low]); r != 0 {
goto write2
}
case encode6Low <= r && r < encode6High:
if r = rune(encode6[r-encode6Low]); r != 0 {
goto write2
}
case encode7Low <= r && r < encode7High:
if r = rune(encode7[r-encode7Low]); r != 0 {
goto write2
}
}
err = internal.ErrASCIIReplacement
break
}
write2:
if nDst+2 > len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst+0] = uint8(r >> 8)
dst[nDst+1] = uint8(r)
nDst += 2
continue
}
return nDst, nSrc, err
}
func init() {
// Check that the hard-coded encode switch covers all tables.
if numEncodeTables != 8 {
panic("bad numEncodeTables")
}
}
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