From 54d3d47daf9190275bbdaf8703b84969a4593451 Mon Sep 17 00:00:00 2001 From: Corey Hulen Date: Fri, 24 Mar 2017 23:31:34 -0700 Subject: PLT-6076 Adding viper libs for config file changes (#5871) * Adding viper libs for config file changes * Removing the old fsnotify lib * updating some missing libs --- .../x/text/encoding/unicode/utf32/utf32.go | 296 +++++++++++++++++++++ 1 file changed, 296 insertions(+) create mode 100644 vendor/golang.org/x/text/encoding/unicode/utf32/utf32.go (limited to 'vendor/golang.org/x/text/encoding/unicode/utf32/utf32.go') diff --git a/vendor/golang.org/x/text/encoding/unicode/utf32/utf32.go b/vendor/golang.org/x/text/encoding/unicode/utf32/utf32.go new file mode 100644 index 000000000..48b215217 --- /dev/null +++ b/vendor/golang.org/x/text/encoding/unicode/utf32/utf32.go @@ -0,0 +1,296 @@ +// Copyright 2016 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 utf32 provides the UTF-32 Unicode encoding. +// +// Please note that support for UTF-32 is discouraged as it is a rare and +// inefficient encoding, unfit for use as an interchange format. For use +// on the web, the W3C strongly discourages its use +// (https://www.w3.org/TR/html5/document-metadata.html#charset) +// while WHATWG directly prohibits supporting it +// (https://html.spec.whatwg.org/multipage/syntax.html#character-encodings). +package utf32 // import "golang.org/x/text/encoding/unicode/utf32" + +import ( + "errors" + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// All lists a configuration for each IANA-defined UTF-32 variant. +var All = []encoding.Encoding{ + UTF32(BigEndian, UseBOM), + UTF32(BigEndian, IgnoreBOM), + UTF32(LittleEndian, IgnoreBOM), +} + +// ErrMissingBOM means that decoding UTF-32 input with ExpectBOM did not +// find a starting byte order mark. +var ErrMissingBOM = errors.New("encoding: missing byte order mark") + +// UTF32 returns a UTF-32 Encoding for the given default endianness and +// byte order mark (BOM) policy. +// +// When decoding from UTF-32 to UTF-8, if the BOMPolicy is IgnoreBOM then +// neither BOMs U+FEFF nor ill-formed code units 0xFFFE0000 in the input +// stream will affect the endianness used for decoding. Instead BOMs will +// be output as their standard UTF-8 encoding "\xef\xbb\xbf" while +// 0xFFFE0000 code units will be output as "\xef\xbf\xbd", the standard +// UTF-8 encoding for the Unicode replacement character. If the BOMPolicy +// is UseBOM or ExpectBOM a starting BOM is not written to the UTF-8 +// output. Instead, it overrides the default endianness e for the remainder +// of the transformation. Any subsequent BOMs U+FEFF or ill-formed code +// units 0xFFFE0000 will not affect the endianness used, and will instead +// be output as their standard UTF-8 (replacement) encodings. For UseBOM, +// if there is no starting BOM, it will proceed with the default +// Endianness. For ExpectBOM, in that case, the transformation will return +// early with an ErrMissingBOM error. +// +// When encoding from UTF-8 to UTF-32, a BOM will be inserted at the start +// of the output if the BOMPolicy is UseBOM or ExpectBOM. Otherwise, a BOM +// will not be inserted. The UTF-8 input does not need to contain a BOM. +// +// There is no concept of a 'native' endianness. If the UTF-32 data is +// produced and consumed in a greater context that implies a certain +// endianness, use IgnoreBOM. Otherwise, use ExpectBOM and always produce +// and consume a BOM. +// +// In the language of http://www.unicode.org/faq/utf_bom.html#bom10, +// IgnoreBOM corresponds to "Where the precise type of the data stream is +// known... the BOM should not be used" and ExpectBOM corresponds to "A +// particular protocol... may require use of the BOM". +func UTF32(e Endianness, b BOMPolicy) encoding.Encoding { + return utf32Encoding{config{e, b}, mibValue[e][b&bomMask]} +} + +// mibValue maps Endianness and BOMPolicy settings to MIB constants for UTF-32. +// Note that some configurations map to the same MIB identifier. +var mibValue = map[Endianness][numBOMValues]identifier.MIB{ + BigEndian: [numBOMValues]identifier.MIB{ + IgnoreBOM: identifier.UTF32BE, + UseBOM: identifier.UTF32, + }, + LittleEndian: [numBOMValues]identifier.MIB{ + IgnoreBOM: identifier.UTF32LE, + UseBOM: identifier.UTF32, + }, + // ExpectBOM is not widely used and has no valid MIB identifier. +} + +// BOMPolicy is a UTF-32 encodings's byte order mark policy. +type BOMPolicy uint8 + +const ( + writeBOM BOMPolicy = 0x01 + acceptBOM BOMPolicy = 0x02 + requireBOM BOMPolicy = 0x04 + bomMask BOMPolicy = 0x07 + + // HACK: numBOMValues == 8 triggers a bug in the 1.4 compiler (cannot have a + // map of an array of length 8 of a type that is also used as a key or value + // in another map). See golang.org/issue/11354. + // TODO: consider changing this value back to 8 if the use of 1.4.* has + // been minimized. + numBOMValues = 8 + 1 + + // IgnoreBOM means to ignore any byte order marks. + IgnoreBOM BOMPolicy = 0 + // Unicode-compliant interpretation for UTF-32BE/LE. + + // UseBOM means that the UTF-32 form may start with a byte order mark, + // which will be used to override the default encoding. + UseBOM BOMPolicy = writeBOM | acceptBOM + // Unicode-compliant interpretation for UTF-32. + + // ExpectBOM means that the UTF-32 form must start with a byte order mark, + // which will be used to override the default encoding. + ExpectBOM BOMPolicy = writeBOM | acceptBOM | requireBOM + // Consistent with BOMPolicy definition in golang.org/x/text/encoding/unicode +) + +// Endianness is a UTF-32 encoding's default endianness. +type Endianness bool + +const ( + // BigEndian is UTF-32BE. + BigEndian Endianness = false + // LittleEndian is UTF-32LE. + LittleEndian Endianness = true +) + +type config struct { + endianness Endianness + bomPolicy BOMPolicy +} + +type utf32Encoding struct { + config + mib identifier.MIB +} + +func (u utf32Encoding) NewDecoder() *encoding.Decoder { + return &encoding.Decoder{Transformer: &utf32Decoder{ + initial: u.config, + current: u.config, + }} +} + +func (u utf32Encoding) NewEncoder() *encoding.Encoder { + return &encoding.Encoder{Transformer: &utf32Encoder{ + endianness: u.endianness, + initialBOMPolicy: u.bomPolicy, + currentBOMPolicy: u.bomPolicy, + }} +} + +func (u utf32Encoding) ID() (mib identifier.MIB, other string) { + return u.mib, "" +} + +func (u utf32Encoding) String() string { + e, b := "B", "" + if u.endianness == LittleEndian { + e = "L" + } + switch u.bomPolicy { + case ExpectBOM: + b = "Expect" + case UseBOM: + b = "Use" + case IgnoreBOM: + b = "Ignore" + } + return "UTF-32" + e + "E (" + b + " BOM)" +} + +type utf32Decoder struct { + initial config + current config +} + +func (u *utf32Decoder) Reset() { + u.current = u.initial +} + +func (u *utf32Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if len(src) == 0 { + if atEOF && u.current.bomPolicy&requireBOM != 0 { + return 0, 0, ErrMissingBOM + } + return 0, 0, nil + } + if u.current.bomPolicy&acceptBOM != 0 { + if len(src) < 4 { + return 0, 0, transform.ErrShortSrc + } + switch { + case src[0] == 0x00 && src[1] == 0x00 && src[2] == 0xfe && src[3] == 0xff: + u.current.endianness = BigEndian + nSrc = 4 + case src[0] == 0xff && src[1] == 0xfe && src[2] == 0x00 && src[3] == 0x00: + u.current.endianness = LittleEndian + nSrc = 4 + default: + if u.current.bomPolicy&requireBOM != 0 { + return 0, 0, ErrMissingBOM + } + } + u.current.bomPolicy = IgnoreBOM + } + + var r rune + var dSize, sSize int + for nSrc < len(src) { + if nSrc+3 < len(src) { + x := uint32(src[nSrc+0])<<24 | uint32(src[nSrc+1])<<16 | + uint32(src[nSrc+2])<<8 | uint32(src[nSrc+3]) + if u.current.endianness == LittleEndian { + x = x>>24 | (x >> 8 & 0x0000FF00) | (x << 8 & 0x00FF0000) | x<<24 + } + r, sSize = rune(x), 4 + if dSize = utf8.RuneLen(r); dSize < 0 { + r, dSize = utf8.RuneError, 3 + } + } else if atEOF { + // 1..3 trailing bytes. + r, dSize, sSize = utf8.RuneError, 3, len(src)-nSrc + } else { + err = transform.ErrShortSrc + break + } + if nDst+dSize > len(dst) { + err = transform.ErrShortDst + break + } + nDst += utf8.EncodeRune(dst[nDst:], r) + nSrc += sSize + } + return nDst, nSrc, err +} + +type utf32Encoder struct { + endianness Endianness + initialBOMPolicy BOMPolicy + currentBOMPolicy BOMPolicy +} + +func (u *utf32Encoder) Reset() { + u.currentBOMPolicy = u.initialBOMPolicy +} + +func (u *utf32Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if u.currentBOMPolicy&writeBOM != 0 { + if len(dst) < 4 { + return 0, 0, transform.ErrShortDst + } + dst[0], dst[1], dst[2], dst[3] = 0x00, 0x00, 0xfe, 0xff + u.currentBOMPolicy = IgnoreBOM + nDst = 4 + } + + r, size := rune(0), 0 + for nSrc < len(src) { + 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 + } + } + } + + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + + dst[nDst+0] = uint8(r >> 24) + dst[nDst+1] = uint8(r >> 16) + dst[nDst+2] = uint8(r >> 8) + dst[nDst+3] = uint8(r) + nDst += 4 + nSrc += size + } + + if u.endianness == LittleEndian { + for i := 0; i < nDst; i += 4 { + dst[i], dst[i+1], dst[i+2], dst[i+3] = dst[i+3], dst[i+2], dst[i+1], dst[i] + } + } + return nDst, nSrc, err +} -- cgit v1.2.3-1-g7c22