Use mod vendor for vendored directory (backwards compatible)

1 files changed, 0 insertions, 434 deletions

diff --git a/vendor/golang.org/x/text/encoding/unicode/unicode.go b/vendor/golang.org/x/text/encoding/unicode/unicode.go
deleted file mode 100644
index 579cadfb..00000000
--- a/vendor/golang.org/x/text/encoding/unicode/unicode.go
+++ /dev/null
@@ -1,434 +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 unicode provides Unicode encodings such as UTF-16.
-package unicode // import "golang.org/x/text/encoding/unicode"
-
-import (
-	"errors"
-	"unicode/utf16"
-	"unicode/utf8"
-
-	"golang.org/x/text/encoding"
-	"golang.org/x/text/encoding/internal"
-	"golang.org/x/text/encoding/internal/identifier"
-	"golang.org/x/text/internal/utf8internal"
-	"golang.org/x/text/runes"
-	"golang.org/x/text/transform"
-)
-
-// TODO: I think the Transformers really should return errors on unmatched
-// surrogate pairs and odd numbers of bytes. This is not required by RFC 2781,
-// which leaves it open, but is suggested by WhatWG. It will allow for all error
-// modes as defined by WhatWG: fatal, HTML and Replacement. This would require
-// the introduction of some kind of error type for conveying the erroneous code
-// point.
-
-// UTF8 is the UTF-8 encoding.
-var UTF8 encoding.Encoding = utf8enc
-
-var utf8enc = &internal.Encoding{
-	&internal.SimpleEncoding{utf8Decoder{}, runes.ReplaceIllFormed()},
-	"UTF-8",
-	identifier.UTF8,
-}
-
-type utf8Decoder struct{ transform.NopResetter }
-
-func (utf8Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
-	var pSrc int // point from which to start copy in src
-	var accept utf8internal.AcceptRange
-
-	// The decoder can only make the input larger, not smaller.
-	n := len(src)
-	if len(dst) < n {
-		err = transform.ErrShortDst
-		n = len(dst)
-		atEOF = false
-	}
-	for nSrc < n {
-		c := src[nSrc]
-		if c < utf8.RuneSelf {
-			nSrc++
-			continue
-		}
-		first := utf8internal.First[c]
-		size := int(first & utf8internal.SizeMask)
-		if first == utf8internal.FirstInvalid {
-			goto handleInvalid // invalid starter byte
-		}
-		accept = utf8internal.AcceptRanges[first>>utf8internal.AcceptShift]
-		if nSrc+size > n {
-			if !atEOF {
-				// We may stop earlier than necessary here if the short sequence
-				// has invalid bytes. Not checking for this simplifies the code
-				// and may avoid duplicate computations in certain conditions.
-				if err == nil {
-					err = transform.ErrShortSrc
-				}
-				break
-			}
-			// Determine the maximal subpart of an ill-formed subsequence.
-			switch {
-			case nSrc+1 >= n || src[nSrc+1] < accept.Lo || accept.Hi < src[nSrc+1]:
-				size = 1
-			case nSrc+2 >= n || src[nSrc+2] < utf8internal.LoCB || utf8internal.HiCB < src[nSrc+2]:
-				size = 2
-			default:
-				size = 3 // As we are short, the maximum is 3.
-			}
-			goto handleInvalid
-		}
-		if c = src[nSrc+1]; c < accept.Lo || accept.Hi < c {
-			size = 1
-			goto handleInvalid // invalid continuation byte
-		} else if size == 2 {
-		} else if c = src[nSrc+2]; c < utf8internal.LoCB || utf8internal.HiCB < c {
-			size = 2
-			goto handleInvalid // invalid continuation byte
-		} else if size == 3 {
-		} else if c = src[nSrc+3]; c < utf8internal.LoCB || utf8internal.HiCB < c {
-			size = 3
-			goto handleInvalid // invalid continuation byte
-		}
-		nSrc += size
-		continue
-
-	handleInvalid:
-		// Copy the scanned input so far.
-		nDst += copy(dst[nDst:], src[pSrc:nSrc])
-
-		// Append RuneError to the destination.
-		const runeError = "\ufffd"
-		if nDst+len(runeError) > len(dst) {
-			return nDst, nSrc, transform.ErrShortDst
-		}
-		nDst += copy(dst[nDst:], runeError)
-
-		// Skip the maximal subpart of an ill-formed subsequence according to
-		// the W3C standard way instead of the Go way. This Transform is
-		// probably the only place in the text repo where it is warranted.
-		nSrc += size
-		pSrc = nSrc
-
-		// Recompute the maximum source length.
-		if sz := len(dst) - nDst; sz < len(src)-nSrc {
-			err = transform.ErrShortDst
-			n = nSrc + sz
-			atEOF = false
-		}
-	}
-	return nDst + copy(dst[nDst:], src[pSrc:nSrc]), nSrc, err
-}
-
-// UTF16 returns a UTF-16 Encoding for the given default endianness and byte
-// order mark (BOM) policy.
-//
-// When decoding from UTF-16 to UTF-8, if the BOMPolicy is IgnoreBOM then
-// neither BOMs U+FEFF nor noncharacters U+FFFE in the input stream will affect
-// the endianness used for decoding, and will instead be output as their
-// standard UTF-8 encodings: "\xef\xbb\xbf" and "\xef\xbf\xbe". If the BOMPolicy
-// is UseBOM or ExpectBOM a staring 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 noncharacters U+FFFE will not
-// affect the endianness used, and will instead be output as their standard
-// UTF-8 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-16, 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-16 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 UTF16(e Endianness, b BOMPolicy) encoding.Encoding {
-	return utf16Encoding{config{e, b}, mibValue[e][b&bomMask]}
-}
-
-// mibValue maps Endianness and BOMPolicy settings to MIB constants. Note that
-// some configurations map to the same MIB identifier. RFC 2781 has requirements
-// and recommendations. Some of the "configurations" are merely recommendations,
-// so multiple configurations could match.
-var mibValue = map[Endianness][numBOMValues]identifier.MIB{
-	BigEndian: [numBOMValues]identifier.MIB{
-		IgnoreBOM: identifier.UTF16BE,
-		UseBOM:    identifier.UTF16, // BigEnding default is preferred by RFC 2781.
-		// TODO: acceptBOM | strictBOM would map to UTF16BE as well.
-	},
-	LittleEndian: [numBOMValues]identifier.MIB{
-		IgnoreBOM: identifier.UTF16LE,
-		UseBOM:    identifier.UTF16, // LittleEndian default is allowed and preferred on Windows.
-		// TODO: acceptBOM | strictBOM would map to UTF16LE as well.
-	},
-	// ExpectBOM is not widely used and has no valid MIB identifier.
-}
-
-// All lists a configuration for each IANA-defined UTF-16 variant.
-var All = []encoding.Encoding{
-	UTF8,
-	UTF16(BigEndian, UseBOM),
-	UTF16(BigEndian, IgnoreBOM),
-	UTF16(LittleEndian, IgnoreBOM),
-}
-
-// BOMPolicy is a UTF-16 encoding'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
-	// Common and RFC 2781-compliant interpretation for UTF-16BE/LE.
-
-	// UseBOM means that the UTF-16 form may start with a byte order mark, which
-	// will be used to override the default encoding.
-	UseBOM BOMPolicy = writeBOM | acceptBOM
-	// Common and RFC 2781-compliant interpretation for UTF-16.
-
-	// ExpectBOM means that the UTF-16 form must start with a byte order mark,
-	// which will be used to override the default encoding.
-	ExpectBOM BOMPolicy = writeBOM | acceptBOM | requireBOM
-	// Used in Java as Unicode (not to be confused with Java's UTF-16) and
-	// ICU's UTF-16,version=1. Not compliant with RFC 2781.
-
-	// TODO (maybe): strictBOM: BOM must match Endianness. This would allow:
-	// - UTF-16(B|L)E,version=1: writeBOM | acceptBOM | requireBOM | strictBOM
-	//    (UnicodeBig and UnicodeLittle in Java)
-	// - RFC 2781-compliant, but less common interpretation for UTF-16(B|L)E:
-	//    acceptBOM | strictBOM (e.g. assigned to CheckBOM).
-	// This addition would be consistent with supporting ExpectBOM.
-)
-
-// Endianness is a UTF-16 encoding's default endianness.
-type Endianness bool
-
-const (
-	// BigEndian is UTF-16BE.
-	BigEndian Endianness = false
-	// LittleEndian is UTF-16LE.
-	LittleEndian Endianness = true
-)
-
-// ErrMissingBOM means that decoding UTF-16 input with ExpectBOM did not find a
-// starting byte order mark.
-var ErrMissingBOM = errors.New("encoding: missing byte order mark")
-
-type utf16Encoding struct {
-	config
-	mib identifier.MIB
-}
-
-type config struct {
-	endianness Endianness
-	bomPolicy  BOMPolicy
-}
-
-func (u utf16Encoding) NewDecoder() *encoding.Decoder {
-	return &encoding.Decoder{Transformer: &utf16Decoder{
-		initial: u.config,
-		current: u.config,
-	}}
-}
-
-func (u utf16Encoding) NewEncoder() *encoding.Encoder {
-	return &encoding.Encoder{Transformer: &utf16Encoder{
-		endianness:       u.endianness,
-		initialBOMPolicy: u.bomPolicy,
-		currentBOMPolicy: u.bomPolicy,
-	}}
-}
-
-func (u utf16Encoding) ID() (mib identifier.MIB, other string) {
-	return u.mib, ""
-}
-
-func (u utf16Encoding) 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-16" + e + "E (" + b + " BOM)"
-}
-
-type utf16Decoder struct {
-	initial config
-	current config
-}
-
-func (u *utf16Decoder) Reset() {
-	u.current = u.initial
-}
-
-func (u *utf16Decoder) 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) < 2 {
-			return 0, 0, transform.ErrShortSrc
-		}
-		switch {
-		case src[0] == 0xfe && src[1] == 0xff:
-			u.current.endianness = BigEndian
-			nSrc = 2
-		case src[0] == 0xff && src[1] == 0xfe:
-			u.current.endianness = LittleEndian
-			nSrc = 2
-		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+1 < len(src) {
-			x := uint16(src[nSrc+0])<<8 | uint16(src[nSrc+1])
-			if u.current.endianness == LittleEndian {
-				x = x>>8 | x<<8
-			}
-			r, sSize = rune(x), 2
-			if utf16.IsSurrogate(r) {
-				if nSrc+3 < len(src) {
-					x = uint16(src[nSrc+2])<<8 | uint16(src[nSrc+3])
-					if u.current.endianness == LittleEndian {
-						x = x>>8 | x<<8
-					}
-					// Save for next iteration if it is not a high surrogate.
-					if isHighSurrogate(rune(x)) {
-						r, sSize = utf16.DecodeRune(r, rune(x)), 4
-					}
-				} else if !atEOF {
-					err = transform.ErrShortSrc
-					break
-				}
-			}
-			if dSize = utf8.RuneLen(r); dSize < 0 {
-				r, dSize = utf8.RuneError, 3
-			}
-		} else if atEOF {
-			// Single trailing byte.
-			r, dSize, sSize = utf8.RuneError, 3, 1
-		} 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
-}
-
-func isHighSurrogate(r rune) bool {
-	return 0xDC00 <= r && r <= 0xDFFF
-}
-
-type utf16Encoder struct {
-	endianness       Endianness
-	initialBOMPolicy BOMPolicy
-	currentBOMPolicy BOMPolicy
-}
-
-func (u *utf16Encoder) Reset() {
-	u.currentBOMPolicy = u.initialBOMPolicy
-}
-
-func (u *utf16Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
-	if u.currentBOMPolicy&writeBOM != 0 {
-		if len(dst) < 2 {
-			return 0, 0, transform.ErrShortDst
-		}
-		dst[0], dst[1] = 0xfe, 0xff
-		u.currentBOMPolicy = IgnoreBOM
-		nDst = 2
-	}
-
-	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 r <= 0xffff {
-			if nDst+2 > len(dst) {
-				err = transform.ErrShortDst
-				break
-			}
-			dst[nDst+0] = uint8(r >> 8)
-			dst[nDst+1] = uint8(r)
-			nDst += 2
-		} else {
-			if nDst+4 > len(dst) {
-				err = transform.ErrShortDst
-				break
-			}
-			r1, r2 := utf16.EncodeRune(r)
-			dst[nDst+0] = uint8(r1 >> 8)
-			dst[nDst+1] = uint8(r1)
-			dst[nDst+2] = uint8(r2 >> 8)
-			dst[nDst+3] = uint8(r2)
-			nDst += 4
-		}
-		nSrc += size
-	}
-
-	if u.endianness == LittleEndian {
-		for i := 0; i < nDst; i += 2 {
-			dst[i], dst[i+1] = dst[i+1], dst[i]
-		}
-	}
-	return nDst, nSrc, err
-}