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Diffstat (limited to 'vendor/golang.org/x/text/encoding/traditionalchinese/big5.go')
-rw-r--r--vendor/golang.org/x/text/encoding/traditionalchinese/big5.go199
1 files changed, 199 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go b/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go
new file mode 100644
index 0000000..1fcddde
--- /dev/null
+++ b/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go
@@ -0,0 +1,199 @@
+// 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")
+ }
+}