diff options
Diffstat (limited to 'vendor/golang.org/x/text/encoding/japanese/iso2022jp.go')
| -rw-r--r-- | vendor/golang.org/x/text/encoding/japanese/iso2022jp.go | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go b/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go deleted file mode 100644 index 613226df5..000000000 --- a/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go +++ /dev/null @@ -1,299 +0,0 @@ -// 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 japanese - -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" -) - -// ISO2022JP is the ISO-2022-JP encoding. -var ISO2022JP encoding.Encoding = &iso2022JP - -var iso2022JP = internal.Encoding{ - internal.FuncEncoding{iso2022JPNewDecoder, iso2022JPNewEncoder}, - "ISO-2022-JP", - identifier.ISO2022JP, -} - -func iso2022JPNewDecoder() transform.Transformer { - return new(iso2022JPDecoder) -} - -func iso2022JPNewEncoder() transform.Transformer { - return new(iso2022JPEncoder) -} - -const ( - asciiState = iota - katakanaState - jis0208State - jis0212State -) - -const asciiEsc = 0x1b - -type iso2022JPDecoder int - -func (d *iso2022JPDecoder) Reset() { - *d = asciiState -} - -func (d *iso2022JPDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { - r, size := rune(0), 0 - for ; nSrc < len(src); nSrc += size { - c0 := src[nSrc] - if c0 >= utf8.RuneSelf { - r, size = '\ufffd', 1 - goto write - } - - if c0 == asciiEsc { - if nSrc+2 >= len(src) { - if !atEOF { - return nDst, nSrc, transform.ErrShortSrc - } - // TODO: is it correct to only skip 1?? - r, size = '\ufffd', 1 - goto write - } - size = 3 - c1 := src[nSrc+1] - c2 := src[nSrc+2] - switch { - case c1 == '$' && (c2 == '@' || c2 == 'B'): // 0x24 {0x40, 0x42} - *d = jis0208State - continue - case c1 == '$' && c2 == '(': // 0x24 0x28 - if nSrc+3 >= len(src) { - if !atEOF { - return nDst, nSrc, transform.ErrShortSrc - } - r, size = '\ufffd', 1 - goto write - } - size = 4 - if src[nSrc+3] == 'D' { - *d = jis0212State - continue - } - case c1 == '(' && (c2 == 'B' || c2 == 'J'): // 0x28 {0x42, 0x4A} - *d = asciiState - continue - case c1 == '(' && c2 == 'I': // 0x28 0x49 - *d = katakanaState - continue - } - r, size = '\ufffd', 1 - goto write - } - - switch *d { - case asciiState: - r, size = rune(c0), 1 - - case katakanaState: - if c0 < 0x21 || 0x60 <= c0 { - r, size = '\ufffd', 1 - goto write - } - r, size = rune(c0)+(0xff61-0x21), 1 - - default: - if c0 == 0x0a { - *d = asciiState - r, size = rune(c0), 1 - goto write - } - if nSrc+1 >= len(src) { - if !atEOF { - return nDst, nSrc, transform.ErrShortSrc - } - r, size = '\ufffd', 1 - goto write - } - size = 2 - c1 := src[nSrc+1] - i := int(c0-0x21)*94 + int(c1-0x21) - if *d == jis0208State && i < len(jis0208Decode) { - r = rune(jis0208Decode[i]) - } else if *d == jis0212State && i < len(jis0212Decode) { - r = rune(jis0212Decode[i]) - } else { - r = '\ufffd' - goto write - } - if r == 0 { - r = '\ufffd' - } - } - - write: - if nDst+utf8.RuneLen(r) > len(dst) { - return nDst, nSrc, transform.ErrShortDst - } - nDst += utf8.EncodeRune(dst[nDst:], r) - } - return nDst, nSrc, err -} - -type iso2022JPEncoder int - -func (e *iso2022JPEncoder) Reset() { - *e = asciiState -} - -func (e *iso2022JPEncoder) 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 - - } 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 - } - } - - // func init checks that the switch covers all tables. - // - // http://encoding.spec.whatwg.org/#iso-2022-jp says that "the index jis0212 - // is not used by the iso-2022-jp encoder due to lack of widespread support". - // - // TODO: do we have to special-case U+00A5 and U+203E, as per - // http://encoding.spec.whatwg.org/#iso-2022-jp - // Doing so would mean that "\u00a5" would not be preserved - // after an encode-decode round trip. - switch { - case encode0Low <= r && r < encode0High: - if r = rune(encode0[r-encode0Low]); r>>tableShift == jis0208 { - goto writeJIS - } - case encode1Low <= r && r < encode1High: - if r = rune(encode1[r-encode1Low]); r>>tableShift == jis0208 { - goto writeJIS - } - case encode2Low <= r && r < encode2High: - if r = rune(encode2[r-encode2Low]); r>>tableShift == jis0208 { - goto writeJIS - } - case encode3Low <= r && r < encode3High: - if r = rune(encode3[r-encode3Low]); r>>tableShift == jis0208 { - goto writeJIS - } - case encode4Low <= r && r < encode4High: - if r = rune(encode4[r-encode4Low]); r>>tableShift == jis0208 { - goto writeJIS - } - case encode5Low <= r && r < encode5High: - if 0xff61 <= r && r < 0xffa0 { - goto writeKatakana - } - if r = rune(encode5[r-encode5Low]); r>>tableShift == jis0208 { - goto writeJIS - } - } - - // Switch back to ASCII state in case of error so that an ASCII - // replacement character can be written in the correct state. - if *e != asciiState { - if nDst+3 > len(dst) { - err = transform.ErrShortDst - break - } - *e = asciiState - dst[nDst+0] = asciiEsc - dst[nDst+1] = '(' - dst[nDst+2] = 'B' - nDst += 3 - } - err = internal.ErrASCIIReplacement - break - } - - if *e != asciiState { - if nDst+4 > len(dst) { - err = transform.ErrShortDst - break - } - *e = asciiState - dst[nDst+0] = asciiEsc - dst[nDst+1] = '(' - dst[nDst+2] = 'B' - nDst += 3 - } else if nDst >= len(dst) { - err = transform.ErrShortDst - break - } - dst[nDst] = uint8(r) - nDst++ - continue - - writeJIS: - if *e != jis0208State { - if nDst+5 > len(dst) { - err = transform.ErrShortDst - break - } - *e = jis0208State - dst[nDst+0] = asciiEsc - dst[nDst+1] = '$' - dst[nDst+2] = 'B' - nDst += 3 - } else if nDst+2 > len(dst) { - err = transform.ErrShortDst - break - } - dst[nDst+0] = 0x21 + uint8(r>>codeShift)&codeMask - dst[nDst+1] = 0x21 + uint8(r)&codeMask - nDst += 2 - continue - - writeKatakana: - if *e != katakanaState { - if nDst+4 > len(dst) { - err = transform.ErrShortDst - break - } - *e = katakanaState - dst[nDst+0] = asciiEsc - dst[nDst+1] = '(' - dst[nDst+2] = 'I' - nDst += 3 - } else if nDst >= len(dst) { - err = transform.ErrShortDst - break - } - dst[nDst] = uint8(r - (0xff61 - 0x21)) - nDst++ - continue - } - if atEOF && err == nil && *e != asciiState { - if nDst+3 > len(dst) { - err = transform.ErrShortDst - } else { - *e = asciiState - dst[nDst+0] = asciiEsc - dst[nDst+1] = '(' - dst[nDst+2] = 'B' - nDst += 3 - } - } - return nDst, nSrc, err -} |