From 6312ad4bf7e48347539eb5b4c5075e447d8142f3 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Fri, 26 Jan 2018 12:18:59 +0100 Subject: Add verndor --- .../x/text/encoding/simplifiedchinese/gbk.go | 269 +++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go (limited to 'vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go') diff --git a/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go b/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go new file mode 100644 index 0000000..b89c45b --- /dev/null +++ b/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go @@ -0,0 +1,269 @@ +// 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 simplifiedchinese + +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" +) + +var ( + // GB18030 is the GB18030 encoding. + GB18030 encoding.Encoding = &gbk18030 + // GBK is the GBK encoding. It encodes an extension of the GB2312 character set + // and is also known as Code Page 936. + GBK encoding.Encoding = &gbk +) + +var gbk = internal.Encoding{ + &internal.SimpleEncoding{ + gbkDecoder{gb18030: false}, + gbkEncoder{gb18030: false}, + }, + "GBK", + identifier.GBK, +} + +var gbk18030 = internal.Encoding{ + &internal.SimpleEncoding{ + gbkDecoder{gb18030: true}, + gbkEncoder{gb18030: true}, + }, + "GB18030", + identifier.GB18030, +} + +type gbkDecoder struct { + transform.NopResetter + gb18030 bool +} + +func (d gbkDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + // Microsoft's Code Page 936 extends GBK 1.0 to encode the euro sign U+20AC + // as 0x80. The HTML5 specification at http://encoding.spec.whatwg.org/#gbk + // says to treat "gbk" as Code Page 936. + case c0 == 0x80: + r, size = '€', 1 + + case 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 0x80 <= c1 && c1 < 0xff: + c1 -= 0x41 + case d.gb18030 && 0x30 <= c1 && c1 < 0x40: + if nSrc+3 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + // The second byte here is always ASCII, so we can set size + // to 1 in all cases. + r, size = utf8.RuneError, 1 + goto write + } + c2 := src[nSrc+2] + if c2 < 0x81 || 0xff <= c2 { + r, size = utf8.RuneError, 1 + goto write + } + c3 := src[nSrc+3] + if c3 < 0x30 || 0x3a <= c3 { + r, size = utf8.RuneError, 1 + goto write + } + size = 4 + r = ((rune(c0-0x81)*10+rune(c1-0x30))*126+rune(c2-0x81))*10 + rune(c3-0x30) + if r < 39420 { + i, j := 0, len(gb18030) + for i < j { + h := i + (j-i)/2 + if r >= rune(gb18030[h][0]) { + i = h + 1 + } else { + j = h + } + } + dec := &gb18030[i-1] + r += rune(dec[1]) - rune(dec[0]) + goto write + } + r -= 189000 + if 0 <= r && r < 0x100000 { + r += 0x10000 + } else { + r, size = utf8.RuneError, 1 + } + goto write + default: + r, size = utf8.RuneError, 1 + goto write + } + r, size = '\ufffd', 2 + if i := int(c0-0x81)*190 + int(c1); i < len(decode) { + 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) + } + return nDst, nSrc, err +} + +type gbkEncoder struct { + transform.NopResetter + gb18030 bool +} + +func (e gbkEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, r2, size := rune(0), 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. + switch { + case encode0Low <= r && r < encode0High: + if r2 = rune(encode0[r-encode0Low]); r2 != 0 { + goto write2 + } + case encode1Low <= r && r < encode1High: + // Microsoft's Code Page 936 extends GBK 1.0 to encode the euro sign U+20AC + // as 0x80. The HTML5 specification at http://encoding.spec.whatwg.org/#gbk + // says to treat "gbk" as Code Page 936. + if r == '€' { + r = 0x80 + goto write1 + } + if r2 = rune(encode1[r-encode1Low]); r2 != 0 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r2 = rune(encode2[r-encode2Low]); r2 != 0 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r2 = rune(encode3[r-encode3Low]); r2 != 0 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r2 = rune(encode4[r-encode4Low]); r2 != 0 { + goto write2 + } + } + + if e.gb18030 { + if r < 0x10000 { + i, j := 0, len(gb18030) + for i < j { + h := i + (j-i)/2 + if r >= rune(gb18030[h][1]) { + i = h + 1 + } else { + j = h + } + } + dec := &gb18030[i-1] + r += rune(dec[0]) - rune(dec[1]) + goto write4 + } else if r < 0x110000 { + r += 189000 - 0x10000 + goto write4 + } + } + err = internal.ErrASCIIReplacement + break + } + + write1: + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r2 >> 8) + dst[nDst+1] = uint8(r2) + nDst += 2 + continue + + write4: + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+3] = uint8(r%10 + 0x30) + r /= 10 + dst[nDst+2] = uint8(r%126 + 0x81) + r /= 126 + dst[nDst+1] = uint8(r%10 + 0x30) + r /= 10 + dst[nDst+0] = uint8(r + 0x81) + nDst += 4 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 5 { + panic("bad numEncodeTables") + } +} -- cgit v1.2.3