enable ya make for go projects

author: uzhas <uzhas@ydb.tech> 2023-11-16 16:04:50 +0300
committer: uzhas <uzhas@ydb.tech> 2023-11-16 17:46:46 +0300
commit: 46f0c0079bb50609d2eeb6586642bcf114fc5239 (patch)
tree: 84e4e4978d57fe5de321ba69bf9d0c290de60a66 /vendor/github.com/klauspost/compress/flate
parent: 73045e389397816cc2bdd6cd7818b4bce427b265 (diff)
download: ydb-46f0c0079bb50609d2eeb6586642bcf114fc5239.tar.gz
103 files changed, 10592 insertions, 0 deletions
diff --git a/vendor/github.com/klauspost/compress/flate/deflate.go b/vendor/github.com/klauspost/compress/flate/deflate.go
new file mode 100644
index 0000000000..5faea0b2b3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/deflate.go
@@ -0,0 +1,988 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright (c) 2015 Klaus Post
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flate
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	NoCompression      = 0
+	BestSpeed          = 1
+	BestCompression    = 9
+	DefaultCompression = -1
+
+	// HuffmanOnly disables Lempel-Ziv match searching and only performs Huffman
+	// entropy encoding. This mode is useful in compressing data that has
+	// already been compressed with an LZ style algorithm (e.g. Snappy or LZ4)
+	// that lacks an entropy encoder. Compression gains are achieved when
+	// certain bytes in the input stream occur more frequently than others.
+	//
+	// Note that HuffmanOnly produces a compressed output that is
+	// RFC 1951 compliant. That is, any valid DEFLATE decompressor will
+	// continue to be able to decompress this output.
+	HuffmanOnly         = -2
+	ConstantCompression = HuffmanOnly // compatibility alias.
+
+	logWindowSize    = 15
+	windowSize       = 1 << logWindowSize
+	windowMask       = windowSize - 1
+	logMaxOffsetSize = 15  // Standard DEFLATE
+	minMatchLength   = 4   // The smallest match that the compressor looks for
+	maxMatchLength   = 258 // The longest match for the compressor
+	minOffsetSize    = 1   // The shortest offset that makes any sense
+
+	// The maximum number of tokens we will encode at the time.
+	// Smaller sizes usually creates less optimal blocks.
+	// Bigger can make context switching slow.
+	// We use this for levels 7-9, so we make it big.
+	maxFlateBlockTokens = 1 << 15
+	maxStoreBlockSize   = 65535
+	hashBits            = 17 // After 17 performance degrades
+	hashSize            = 1 << hashBits
+	hashMask            = (1 << hashBits) - 1
+	hashShift           = (hashBits + minMatchLength - 1) / minMatchLength
+	maxHashOffset       = 1 << 28
+
+	skipNever = math.MaxInt32
+
+	debugDeflate = false
+)
+
+type compressionLevel struct {
+	good, lazy, nice, chain, fastSkipHashing, level int
+}
+
+// Compression levels have been rebalanced from zlib deflate defaults
+// to give a bigger spread in speed and compression.
+// See https://blog.klauspost.com/rebalancing-deflate-compression-levels/
+var levels = []compressionLevel{
+	{}, // 0
+	// Level 1-6 uses specialized algorithm - values not used
+	{0, 0, 0, 0, 0, 1},
+	{0, 0, 0, 0, 0, 2},
+	{0, 0, 0, 0, 0, 3},
+	{0, 0, 0, 0, 0, 4},
+	{0, 0, 0, 0, 0, 5},
+	{0, 0, 0, 0, 0, 6},
+	// Levels 7-9 use increasingly more lazy matching
+	// and increasingly stringent conditions for "good enough".
+	{8, 12, 16, 24, skipNever, 7},
+	{16, 30, 40, 64, skipNever, 8},
+	{32, 258, 258, 1024, skipNever, 9},
+}
+
+// advancedState contains state for the advanced levels, with bigger hash tables, etc.
+type advancedState struct {
+	// deflate state
+	length         int
+	offset         int
+	maxInsertIndex int
+	chainHead      int
+	hashOffset     int
+
+	ii uint16 // position of last match, intended to overflow to reset.
+
+	// input window: unprocessed data is window[index:windowEnd]
+	index     int
+	hashMatch [maxMatchLength + minMatchLength]uint32
+
+	// Input hash chains
+	// hashHead[hashValue] contains the largest inputIndex with the specified hash value
+	// If hashHead[hashValue] is within the current window, then
+	// hashPrev[hashHead[hashValue] & windowMask] contains the previous index
+	// with the same hash value.
+	hashHead [hashSize]uint32
+	hashPrev [windowSize]uint32
+}
+
+type compressor struct {
+	compressionLevel
+
+	h *huffmanEncoder
+	w *huffmanBitWriter
+
+	// compression algorithm
+	fill func(*compressor, []byte) int // copy data to window
+	step func(*compressor)             // process window
+
+	window     []byte
+	windowEnd  int
+	blockStart int // window index where current tokens start
+	err        error
+
+	// queued output tokens
+	tokens tokens
+	fast   fastEnc
+	state  *advancedState
+
+	sync          bool // requesting flush
+	byteAvailable bool // if true, still need to process window[index-1].
+}
+
+func (d *compressor) fillDeflate(b []byte) int {
+	s := d.state
+	if s.index >= 2*windowSize-(minMatchLength+maxMatchLength) {
+		// shift the window by windowSize
+		//copy(d.window[:], d.window[windowSize:2*windowSize])
+		*(*[windowSize]byte)(d.window) = *(*[windowSize]byte)(d.window[windowSize:])
+		s.index -= windowSize
+		d.windowEnd -= windowSize
+		if d.blockStart >= windowSize {
+			d.blockStart -= windowSize
+		} else {
+			d.blockStart = math.MaxInt32
+		}
+		s.hashOffset += windowSize
+		if s.hashOffset > maxHashOffset {
+			delta := s.hashOffset - 1
+			s.hashOffset -= delta
+			s.chainHead -= delta
+			// Iterate over slices instead of arrays to avoid copying
+			// the entire table onto the stack (Issue #18625).
+			for i, v := range s.hashPrev[:] {
+				if int(v) > delta {
+					s.hashPrev[i] = uint32(int(v) - delta)
+				} else {
+					s.hashPrev[i] = 0
+				}
+			}
+			for i, v := range s.hashHead[:] {
+				if int(v) > delta {
+					s.hashHead[i] = uint32(int(v) - delta)
+				} else {
+					s.hashHead[i] = 0
+				}
+			}
+		}
+	}
+	n := copy(d.window[d.windowEnd:], b)
+	d.windowEnd += n
+	return n
+}
+
+func (d *compressor) writeBlock(tok *tokens, index int, eof bool) error {
+	if index > 0 || eof {
+		var window []byte
+		if d.blockStart <= index {
+			window = d.window[d.blockStart:index]
+		}
+		d.blockStart = index
+		//d.w.writeBlock(tok, eof, window)
+		d.w.writeBlockDynamic(tok, eof, window, d.sync)
+		return d.w.err
+	}
+	return nil
+}
+
+// writeBlockSkip writes the current block and uses the number of tokens
+// to determine if the block should be stored on no matches, or
+// only huffman encoded.
+func (d *compressor) writeBlockSkip(tok *tokens, index int, eof bool) error {
+	if index > 0 || eof {
+		if d.blockStart <= index {
+			window := d.window[d.blockStart:index]
+			// If we removed less than a 64th of all literals
+			// we huffman compress the block.
+			if int(tok.n) > len(window)-int(tok.n>>6) {
+				d.w.writeBlockHuff(eof, window, d.sync)
+			} else {
+				// Write a dynamic huffman block.
+				d.w.writeBlockDynamic(tok, eof, window, d.sync)
+			}
+		} else {
+			d.w.writeBlock(tok, eof, nil)
+		}
+		d.blockStart = index
+		return d.w.err
+	}
+	return nil
+}
+
+// fillWindow will fill the current window with the supplied
+// dictionary and calculate all hashes.
+// This is much faster than doing a full encode.
+// Should only be used after a start/reset.
+func (d *compressor) fillWindow(b []byte) {
+	// Do not fill window if we are in store-only or huffman mode.
+	if d.level <= 0 {
+		return
+	}
+	if d.fast != nil {
+		// encode the last data, but discard the result
+		if len(b) > maxMatchOffset {
+			b = b[len(b)-maxMatchOffset:]
+		}
+		d.fast.Encode(&d.tokens, b)
+		d.tokens.Reset()
+		return
+	}
+	s := d.state
+	// If we are given too much, cut it.
+	if len(b) > windowSize {
+		b = b[len(b)-windowSize:]
+	}
+	// Add all to window.
+	n := copy(d.window[d.windowEnd:], b)
+
+	// Calculate 256 hashes at the time (more L1 cache hits)
+	loops := (n + 256 - minMatchLength) / 256
+	for j := 0; j < loops; j++ {
+		startindex := j * 256
+		end := startindex + 256 + minMatchLength - 1
+		if end > n {
+			end = n
+		}
+		tocheck := d.window[startindex:end]
+		dstSize := len(tocheck) - minMatchLength + 1
+
+		if dstSize <= 0 {
+			continue
+		}
+
+		dst := s.hashMatch[:dstSize]
+		bulkHash4(tocheck, dst)
+		var newH uint32
+		for i, val := range dst {
+			di := i + startindex
+			newH = val & hashMask
+			// Get previous value with the same hash.
+			// Our chain should point to the previous value.
+			s.hashPrev[di&windowMask] = s.hashHead[newH]
+			// Set the head of the hash chain to us.
+			s.hashHead[newH] = uint32(di + s.hashOffset)
+		}
+	}
+	// Update window information.
+	d.windowEnd += n
+	s.index = n
+}
+
+// Try to find a match starting at index whose length is greater than prevSize.
+// We only look at chainCount possibilities before giving up.
+// pos = s.index, prevHead = s.chainHead-s.hashOffset, prevLength=minMatchLength-1, lookahead
+func (d *compressor) findMatch(pos int, prevHead int, lookahead int) (length, offset int, ok bool) {
+	minMatchLook := maxMatchLength
+	if lookahead < minMatchLook {
+		minMatchLook = lookahead
+	}
+
+	win := d.window[0 : pos+minMatchLook]
+
+	// We quit when we get a match that's at least nice long
+	nice := len(win) - pos
+	if d.nice < nice {
+		nice = d.nice
+	}
+
+	// If we've got a match that's good enough, only look in 1/4 the chain.
+	tries := d.chain
+	length = minMatchLength - 1
+
+	wEnd := win[pos+length]
+	wPos := win[pos:]
+	minIndex := pos - windowSize
+	if minIndex < 0 {
+		minIndex = 0
+	}
+	offset = 0
+
+	if d.chain < 100 {
+		for i := prevHead; tries > 0; tries-- {
+			if wEnd == win[i+length] {
+				n := matchLen(win[i:i+minMatchLook], wPos)
+				if n > length {
+					length = n
+					offset = pos - i
+					ok = true
+					if n >= nice {
+						// The match is good enough that we don't try to find a better one.
+						break
+					}
+					wEnd = win[pos+n]
+				}
+			}
+			if i <= minIndex {
+				// hashPrev[i & windowMask] has already been overwritten, so stop now.
+				break
+			}
+			i = int(d.state.hashPrev[i&windowMask]) - d.state.hashOffset
+			if i < minIndex {
+				break
+			}
+		}
+		return
+	}
+
+	// Minimum gain to accept a match.
+	cGain := 4
+
+	// Some like it higher (CSV), some like it lower (JSON)
+	const baseCost = 3
+	// Base is 4 bytes at with an additional cost.
+	// Matches must be better than this.
+
+	for i := prevHead; tries > 0; tries-- {
+		if wEnd == win[i+length] {
+			n := matchLen(win[i:i+minMatchLook], wPos)
+			if n > length {
+				// Calculate gain. Estimate
+				newGain := d.h.bitLengthRaw(wPos[:n]) - int(offsetExtraBits[offsetCode(uint32(pos-i))]) - baseCost - int(lengthExtraBits[lengthCodes[(n-3)&255]])
+
+				//fmt.Println("gain:", newGain, "prev:", cGain, "raw:", d.h.bitLengthRaw(wPos[:n]), "this-len:", n, "prev-len:", length)
+				if newGain > cGain {
+					length = n
+					offset = pos - i
+					cGain = newGain
+					ok = true
+					if n >= nice {
+						// The match is good enough that we don't try to find a better one.
+						break
+					}
+					wEnd = win[pos+n]
+				}
+			}
+		}
+		if i <= minIndex {
+			// hashPrev[i & windowMask] has already been overwritten, so stop now.
+			break
+		}
+		i = int(d.state.hashPrev[i&windowMask]) - d.state.hashOffset
+		if i < minIndex {
+			break
+		}
+	}
+	return
+}
+
+func (d *compressor) writeStoredBlock(buf []byte) error {
+	if d.w.writeStoredHeader(len(buf), false); d.w.err != nil {
+		return d.w.err
+	}
+	d.w.writeBytes(buf)
+	return d.w.err
+}
+
+// hash4 returns a hash representation of the first 4 bytes
+// of the supplied slice.
+// The caller must ensure that len(b) >= 4.
+func hash4(b []byte) uint32 {
+	return hash4u(binary.LittleEndian.Uint32(b), hashBits)
+}
+
+// hash4 returns the hash of u to fit in a hash table with h bits.
+// Preferably h should be a constant and should always be <32.
+func hash4u(u uint32, h uint8) uint32 {
+	return (u * prime4bytes) >> (32 - h)
+}
+
+// bulkHash4 will compute hashes using the same
+// algorithm as hash4
+func bulkHash4(b []byte, dst []uint32) {
+	if len(b) < 4 {
+		return
+	}
+	hb := binary.LittleEndian.Uint32(b)
+
+	dst[0] = hash4u(hb, hashBits)
+	end := len(b) - 4 + 1
+	for i := 1; i < end; i++ {
+		hb = (hb >> 8) | uint32(b[i+3])<<24
+		dst[i] = hash4u(hb, hashBits)
+	}
+}
+
+func (d *compressor) initDeflate() {
+	d.window = make([]byte, 2*windowSize)
+	d.byteAvailable = false
+	d.err = nil
+	if d.state == nil {
+		return
+	}
+	s := d.state
+	s.index = 0
+	s.hashOffset = 1
+	s.length = minMatchLength - 1
+	s.offset = 0
+	s.chainHead = -1
+}
+
+// deflateLazy is the same as deflate, but with d.fastSkipHashing == skipNever,
+// meaning it always has lazy matching on.
+func (d *compressor) deflateLazy() {
+	s := d.state
+	// Sanity enables additional runtime tests.
+	// It's intended to be used during development
+	// to supplement the currently ad-hoc unit tests.
+	const sanity = debugDeflate
+
+	if d.windowEnd-s.index < minMatchLength+maxMatchLength && !d.sync {
+		return
+	}
+	if d.windowEnd != s.index && d.chain > 100 {
+		// Get literal huffman coder.
+		if d.h == nil {
+			d.h = newHuffmanEncoder(maxFlateBlockTokens)
+		}
+		var tmp [256]uint16
+		for _, v := range d.window[s.index:d.windowEnd] {
+			tmp[v]++
+		}
+		d.h.generate(tmp[:], 15)
+	}
+
+	s.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
+
+	for {
+		if sanity && s.index > d.windowEnd {
+			panic("index > windowEnd")
+		}
+		lookahead := d.windowEnd - s.index
+		if lookahead < minMatchLength+maxMatchLength {
+			if !d.sync {
+				return
+			}
+			if sanity && s.index > d.windowEnd {
+				panic("index > windowEnd")
+			}
+			if lookahead == 0 {
+				// Flush current output block if any.
+				if d.byteAvailable {
+					// There is still one pending token that needs to be flushed
+					d.tokens.AddLiteral(d.window[s.index-1])
+					d.byteAvailable = false
+				}
+				if d.tokens.n > 0 {
+					if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+						return
+					}
+					d.tokens.Reset()
+				}
+				return
+			}
+		}
+		if s.index < s.maxInsertIndex {
+			// Update the hash
+			hash := hash4(d.window[s.index:])
+			ch := s.hashHead[hash]
+			s.chainHead = int(ch)
+			s.hashPrev[s.index&windowMask] = ch
+			s.hashHead[hash] = uint32(s.index + s.hashOffset)
+		}
+		prevLength := s.length
+		prevOffset := s.offset
+		s.length = minMatchLength - 1
+		s.offset = 0
+		minIndex := s.index - windowSize
+		if minIndex < 0 {
+			minIndex = 0
+		}
+
+		if s.chainHead-s.hashOffset >= minIndex && lookahead > prevLength && prevLength < d.lazy {
+			if newLength, newOffset, ok := d.findMatch(s.index, s.chainHead-s.hashOffset, lookahead); ok {
+				s.length = newLength
+				s.offset = newOffset
+			}
+		}
+
+		if prevLength >= minMatchLength && s.length <= prevLength {
+			// No better match, but check for better match at end...
+			//
+			// Skip forward a number of bytes.
+			// Offset of 2 seems to yield best results. 3 is sometimes better.
+			const checkOff = 2
+
+			// Check all, except full length
+			if prevLength < maxMatchLength-checkOff {
+				prevIndex := s.index - 1
+				if prevIndex+prevLength < s.maxInsertIndex {
+					end := lookahead
+					if lookahead > maxMatchLength+checkOff {
+						end = maxMatchLength + checkOff
+					}
+					end += prevIndex
+
+					// Hash at match end.
+					h := hash4(d.window[prevIndex+prevLength:])
+					ch2 := int(s.hashHead[h]) - s.hashOffset - prevLength
+					if prevIndex-ch2 != prevOffset && ch2 > minIndex+checkOff {
+						length := matchLen(d.window[prevIndex+checkOff:end], d.window[ch2+checkOff:])
+						// It seems like a pure length metric is best.
+						if length > prevLength {
+							prevLength = length
+							prevOffset = prevIndex - ch2
+
+							// Extend back...
+							for i := checkOff - 1; i >= 0; i-- {
+								if prevLength >= maxMatchLength || d.window[prevIndex+i] != d.window[ch2+i] {
+									// Emit tokens we "owe"
+									for j := 0; j <= i; j++ {
+										d.tokens.AddLiteral(d.window[prevIndex+j])
+										if d.tokens.n == maxFlateBlockTokens {
+											// The block includes the current character
+											if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+												return
+											}
+											d.tokens.Reset()
+										}
+										s.index++
+										if s.index < s.maxInsertIndex {
+											h := hash4(d.window[s.index:])
+											ch := s.hashHead[h]
+											s.chainHead = int(ch)
+											s.hashPrev[s.index&windowMask] = ch
+											s.hashHead[h] = uint32(s.index + s.hashOffset)
+										}
+									}
+									break
+								} else {
+									prevLength++
+								}
+							}
+						} else if false {
+							// Check one further ahead.
+							// Only rarely better, disabled for now.
+							prevIndex++
+							h := hash4(d.window[prevIndex+prevLength:])
+							ch2 := int(s.hashHead[h]) - s.hashOffset - prevLength
+							if prevIndex-ch2 != prevOffset && ch2 > minIndex+checkOff {
+								length := matchLen(d.window[prevIndex+checkOff:end], d.window[ch2+checkOff:])
+								// It seems like a pure length metric is best.
+								if length > prevLength+checkOff {
+									prevLength = length
+									prevOffset = prevIndex - ch2
+									prevIndex--
+
+									// Extend back...
+									for i := checkOff; i >= 0; i-- {
+										if prevLength >= maxMatchLength || d.window[prevIndex+i] != d.window[ch2+i-1] {
+											// Emit tokens we "owe"
+											for j := 0; j <= i; j++ {
+												d.tokens.AddLiteral(d.window[prevIndex+j])
+												if d.tokens.n == maxFlateBlockTokens {
+													// The block includes the current character
+													if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+														return
+													}
+													d.tokens.Reset()
+												}
+												s.index++
+												if s.index < s.maxInsertIndex {
+													h := hash4(d.window[s.index:])
+													ch := s.hashHead[h]
+													s.chainHead = int(ch)
+													s.hashPrev[s.index&windowMask] = ch
+													s.hashHead[h] = uint32(s.index + s.hashOffset)
+												}
+											}
+											break
+										} else {
+											prevLength++
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+			// There was a match at the previous step, and the current match is
+			// not better. Output the previous match.
+			d.tokens.AddMatch(uint32(prevLength-3), uint32(prevOffset-minOffsetSize))
+
+			// Insert in the hash table all strings up to the end of the match.
+			// index and index-1 are already inserted. If there is not enough
+			// lookahead, the last two strings are not inserted into the hash
+			// table.
+			newIndex := s.index + prevLength - 1
+			// Calculate missing hashes
+			end := newIndex
+			if end > s.maxInsertIndex {
+				end = s.maxInsertIndex
+			}
+			end += minMatchLength - 1
+			startindex := s.index + 1
+			if startindex > s.maxInsertIndex {
+				startindex = s.maxInsertIndex
+			}
+			tocheck := d.window[startindex:end]
+			dstSize := len(tocheck) - minMatchLength + 1
+			if dstSize > 0 {
+				dst := s.hashMatch[:dstSize]
+				bulkHash4(tocheck, dst)
+				var newH uint32
+				for i, val := range dst {
+					di := i + startindex
+					newH = val & hashMask
+					// Get previous value with the same hash.
+					// Our chain should point to the previous value.
+					s.hashPrev[di&windowMask] = s.hashHead[newH]
+					// Set the head of the hash chain to us.
+					s.hashHead[newH] = uint32(di + s.hashOffset)
+				}
+			}
+
+			s.index = newIndex
+			d.byteAvailable = false
+			s.length = minMatchLength - 1
+			if d.tokens.n == maxFlateBlockTokens {
+				// The block includes the current character
+				if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+					return
+				}
+				d.tokens.Reset()
+			}
+			s.ii = 0
+		} else {
+			// Reset, if we got a match this run.
+			if s.length >= minMatchLength {
+				s.ii = 0
+			}
+			// We have a byte waiting. Emit it.
+			if d.byteAvailable {
+				s.ii++
+				d.tokens.AddLiteral(d.window[s.index-1])
+				if d.tokens.n == maxFlateBlockTokens {
+					if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+						return
+					}
+					d.tokens.Reset()
+				}
+				s.index++
+
+				// If we have a long run of no matches, skip additional bytes
+				// Resets when s.ii overflows after 64KB.
+				if n := int(s.ii) - d.chain; n > 0 {
+					n = 1 + int(n>>6)
+					for j := 0; j < n; j++ {
+						if s.index >= d.windowEnd-1 {
+							break
+						}
+						d.tokens.AddLiteral(d.window[s.index-1])
+						if d.tokens.n == maxFlateBlockTokens {
+							if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+								return
+							}
+							d.tokens.Reset()
+						}
+						// Index...
+						if s.index < s.maxInsertIndex {
+							h := hash4(d.window[s.index:])
+							ch := s.hashHead[h]
+							s.chainHead = int(ch)
+							s.hashPrev[s.index&windowMask] = ch
+							s.hashHead[h] = uint32(s.index + s.hashOffset)
+						}
+						s.index++
+					}
+					// Flush last byte
+					d.tokens.AddLiteral(d.window[s.index-1])
+					d.byteAvailable = false
+					// s.length = minMatchLength - 1 // not needed, since s.ii is reset above, so it should never be > minMatchLength
+					if d.tokens.n == maxFlateBlockTokens {
+						if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+							return
+						}
+						d.tokens.Reset()
+					}
+				}
+			} else {
+				s.index++
+				d.byteAvailable = true
+			}
+		}
+	}
+}
+
+func (d *compressor) store() {
+	if d.windowEnd > 0 && (d.windowEnd == maxStoreBlockSize || d.sync) {
+		d.err = d.writeStoredBlock(d.window[:d.windowEnd])
+		d.windowEnd = 0
+	}
+}
+
+// fillWindow will fill the buffer with data for huffman-only compression.
+// The number of bytes copied is returned.
+func (d *compressor) fillBlock(b []byte) int {
+	n := copy(d.window[d.windowEnd:], b)
+	d.windowEnd += n
+	return n
+}
+
+// storeHuff will compress and store the currently added data,
+// if enough has been accumulated or we at the end of the stream.
+// Any error that occurred will be in d.err
+func (d *compressor) storeHuff() {
+	if d.windowEnd < len(d.window) && !d.sync || d.windowEnd == 0 {
+		return
+	}
+	d.w.writeBlockHuff(false, d.window[:d.windowEnd], d.sync)
+	d.err = d.w.err
+	d.windowEnd = 0
+}
+
+// storeFast will compress and store the currently added data,
+// if enough has been accumulated or we at the end of the stream.
+// Any error that occurred will be in d.err
+func (d *compressor) storeFast() {
+	// We only compress if we have maxStoreBlockSize.
+	if d.windowEnd < len(d.window) {
+		if !d.sync {
+			return
+		}
+		// Handle extremely small sizes.
+		if d.windowEnd < 128 {
+			if d.windowEnd == 0 {
+				return
+			}
+			if d.windowEnd <= 32 {
+				d.err = d.writeStoredBlock(d.window[:d.windowEnd])
+			} else {
+				d.w.writeBlockHuff(false, d.window[:d.windowEnd], true)
+				d.err = d.w.err
+			}
+			d.tokens.Reset()
+			d.windowEnd = 0
+			d.fast.Reset()
+			return
+		}
+	}
+
+	d.fast.Encode(&d.tokens, d.window[:d.windowEnd])
+	// If we made zero matches, store the block as is.
+	if d.tokens.n == 0 {
+		d.err = d.writeStoredBlock(d.window[:d.windowEnd])
+		// If we removed less than 1/16th, huffman compress the block.
+	} else if int(d.tokens.n) > d.windowEnd-(d.windowEnd>>4) {
+		d.w.writeBlockHuff(false, d.window[:d.windowEnd], d.sync)
+		d.err = d.w.err
+	} else {
+		d.w.writeBlockDynamic(&d.tokens, false, d.window[:d.windowEnd], d.sync)
+		d.err = d.w.err
+	}
+	d.tokens.Reset()
+	d.windowEnd = 0
+}
+
+// write will add input byte to the stream.
+// Unless an error occurs all bytes will be consumed.
+func (d *compressor) write(b []byte) (n int, err error) {
+	if d.err != nil {
+		return 0, d.err
+	}
+	n = len(b)
+	for len(b) > 0 {
+		if d.windowEnd == len(d.window) || d.sync {
+			d.step(d)
+		}
+		b = b[d.fill(d, b):]
+		if d.err != nil {
+			return 0, d.err
+		}
+	}
+	return n, d.err
+}
+
+func (d *compressor) syncFlush() error {
+	d.sync = true
+	if d.err != nil {
+		return d.err
+	}
+	d.step(d)
+	if d.err == nil {
+		d.w.writeStoredHeader(0, false)
+		d.w.flush()
+		d.err = d.w.err
+	}
+	d.sync = false
+	return d.err
+}
+
+func (d *compressor) init(w io.Writer, level int) (err error) {
+	d.w = newHuffmanBitWriter(w)
+
+	switch {
+	case level == NoCompression:
+		d.window = make([]byte, maxStoreBlockSize)
+		d.fill = (*compressor).fillBlock
+		d.step = (*compressor).store
+	case level == ConstantCompression:
+		d.w.logNewTablePenalty = 10
+		d.window = make([]byte, 32<<10)
+		d.fill = (*compressor).fillBlock
+		d.step = (*compressor).storeHuff
+	case level == DefaultCompression:
+		level = 5
+		fallthrough
+	case level >= 1 && level <= 6:
+		d.w.logNewTablePenalty = 7
+		d.fast = newFastEnc(level)
+		d.window = make([]byte, maxStoreBlockSize)
+		d.fill = (*compressor).fillBlock
+		d.step = (*compressor).storeFast
+	case 7 <= level && level <= 9:
+		d.w.logNewTablePenalty = 8
+		d.state = &advancedState{}
+		d.compressionLevel = levels[level]
+		d.initDeflate()
+		d.fill = (*compressor).fillDeflate
+		d.step = (*compressor).deflateLazy
+	default:
+		return fmt.Errorf("flate: invalid compression level %d: want value in range [-2, 9]", level)
+	}
+	d.level = level
+	return nil
+}
+
+// reset the state of the compressor.
+func (d *compressor) reset(w io.Writer) {
+	d.w.reset(w)
+	d.sync = false
+	d.err = nil
+	// We only need to reset a few things for Snappy.
+	if d.fast != nil {
+		d.fast.Reset()
+		d.windowEnd = 0
+		d.tokens.Reset()
+		return
+	}
+	switch d.compressionLevel.chain {
+	case 0:
+		// level was NoCompression or ConstantCompresssion.
+		d.windowEnd = 0
+	default:
+		s := d.state
+		s.chainHead = -1
+		for i := range s.hashHead {
+			s.hashHead[i] = 0
+		}
+		for i := range s.hashPrev {
+			s.hashPrev[i] = 0
+		}
+		s.hashOffset = 1
+		s.index, d.windowEnd = 0, 0
+		d.blockStart, d.byteAvailable = 0, false
+		d.tokens.Reset()
+		s.length = minMatchLength - 1
+		s.offset = 0
+		s.ii = 0
+		s.maxInsertIndex = 0
+	}
+}
+
+func (d *compressor) close() error {
+	if d.err != nil {
+		return d.err
+	}
+	d.sync = true
+	d.step(d)
+	if d.err != nil {
+		return d.err
+	}
+	if d.w.writeStoredHeader(0, true); d.w.err != nil {
+		return d.w.err
+	}
+	d.w.flush()
+	d.w.reset(nil)
+	return d.w.err
+}
+
+// NewWriter returns a new Writer compressing data at the given level.
+// Following zlib, levels range from 1 (BestSpeed) to 9 (BestCompression);
+// higher levels typically run slower but compress more.
+// Level 0 (NoCompression) does not attempt any compression; it only adds the
+// necessary DEFLATE framing.
+// Level -1 (DefaultCompression) uses the default compression level.
+// Level -2 (ConstantCompression) will use Huffman compression only, giving
+// a very fast compression for all types of input, but sacrificing considerable
+// compression efficiency.
+//
+// If level is in the range [-2, 9] then the error returned will be nil.
+// Otherwise the error returned will be non-nil.
+func NewWriter(w io.Writer, level int) (*Writer, error) {
+	var dw Writer
+	if err := dw.d.init(w, level); err != nil {
+		return nil, err
+	}
+	return &dw, nil
+}
+
+// NewWriterDict is like NewWriter but initializes the new
+// Writer with a preset dictionary.  The returned Writer behaves
+// as if the dictionary had been written to it without producing
+// any compressed output.  The compressed data written to w
+// can only be decompressed by a Reader initialized with the
+// same dictionary.
+func NewWriterDict(w io.Writer, level int, dict []byte) (*Writer, error) {
+	zw, err := NewWriter(w, level)
+	if err != nil {
+		return nil, err
+	}
+	zw.d.fillWindow(dict)
+	zw.dict = append(zw.dict, dict...) // duplicate dictionary for Reset method.
+	return zw, err
+}
+
+// A Writer takes data written to it and writes the compressed
+// form of that data to an underlying writer (see NewWriter).
+type Writer struct {
+	d    compressor
+	dict []byte
+}
+
+// Write writes data to w, which will eventually write the
+// compressed form of data to its underlying writer.
+func (w *Writer) Write(data []byte) (n int, err error) {
+	return w.d.write(data)
+}
+
+// Flush flushes any pending data to the underlying writer.
+// It is useful mainly in compressed network protocols, to ensure that
+// a remote reader has enough data to reconstruct a packet.
+// Flush does not return until the data has been written.
+// Calling Flush when there is no pending data still causes the Writer
+// to emit a sync marker of at least 4 bytes.
+// If the underlying writer returns an error, Flush returns that error.
+//
+// In the terminology of the zlib library, Flush is equivalent to Z_SYNC_FLUSH.
+func (w *Writer) Flush() error {
+	// For more about flushing:
+	// http://www.bolet.org/~pornin/deflate-flush.html
+	return w.d.syncFlush()
+}
+
+// Close flushes and closes the writer.
+func (w *Writer) Close() error {
+	return w.d.close()
+}
+
+// Reset discards the writer's state and makes it equivalent to
+// the result of NewWriter or NewWriterDict called with dst
+// and w's level and dictionary.
+func (w *Writer) Reset(dst io.Writer) {
+	if len(w.dict) > 0 {
+		// w was created with NewWriterDict
+		w.d.reset(dst)
+		if dst != nil {
+			w.d.fillWindow(w.dict)
+		}
+	} else {
+		// w was created with NewWriter
+		w.d.reset(dst)
+	}
+}
+
+// ResetDict discards the writer's state and makes it equivalent to
+// the result of NewWriter or NewWriterDict called with dst
+// and w's level, but sets a specific dictionary.
+func (w *Writer) ResetDict(dst io.Writer, dict []byte) {
+	w.dict = dict
+	w.d.reset(dst)
+	w.d.fillWindow(w.dict)
+}
diff --git a/vendor/github.com/klauspost/compress/flate/deflate_test.go b/vendor/github.com/klauspost/compress/flate/deflate_test.go
new file mode 100644
index 0000000000..f9584ceb3a
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/deflate_test.go
@@ -0,0 +1,665 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright (c) 2015 Klaus Post
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flate
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"strings"
+	"sync"
+	"testing"
+)
+
+type deflateTest struct {
+	in    []byte
+	level int
+	out   []byte
+}
+
+type deflateInflateTest struct {
+	in []byte
+}
+
+type reverseBitsTest struct {
+	in       uint16
+	bitCount uint8
+	out      uint16
+}
+
+var deflateTests = []*deflateTest{
+	0: {[]byte{}, 0, []byte{0x3, 0x0}},
+	1: {[]byte{0x11}, BestCompression, []byte{0x12, 0x4, 0xc, 0x0}},
+	2: {[]byte{0x11}, BestCompression, []byte{0x12, 0x4, 0xc, 0x0}},
+	3: {[]byte{0x11}, BestCompression, []byte{0x12, 0x4, 0xc, 0x0}},
+
+	4: {[]byte{0x11}, 0, []byte{0x0, 0x1, 0x0, 0xfe, 0xff, 0x11, 0x3, 0x0}},
+	5: {[]byte{0x11, 0x12}, 0, []byte{0x0, 0x2, 0x0, 0xfd, 0xff, 0x11, 0x12, 0x3, 0x0}},
+	6: {[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, 0,
+		[]byte{0x0, 0x8, 0x0, 0xf7, 0xff, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x3, 0x0},
+	},
+	7:  {[]byte{}, 1, []byte{0x3, 0x0}},
+	8:  {[]byte{0x11}, BestCompression, []byte{0x12, 0x4, 0xc, 0x0}},
+	9:  {[]byte{0x11, 0x12}, BestCompression, []byte{0x12, 0x14, 0x2, 0xc, 0x0}},
+	10: {[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, BestCompression, []byte{0x12, 0x84, 0x1, 0xc0, 0x0}},
+	11: {[]byte{}, 9, []byte{0x3, 0x0}},
+	12: {[]byte{0x11}, 9, []byte{0x12, 0x4, 0xc, 0x0}},
+	13: {[]byte{0x11, 0x12}, 9, []byte{0x12, 0x14, 0x2, 0xc, 0x0}},
+	14: {[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, 9, []byte{0x12, 0x84, 0x1, 0xc0, 0x0}},
+}
+
+var deflateInflateTests = []*deflateInflateTest{
+	{[]byte{}},
+	{[]byte{0x11}},
+	{[]byte{0x11, 0x12}},
+	{[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}},
+	{[]byte{0x11, 0x10, 0x13, 0x41, 0x21, 0x21, 0x41, 0x13, 0x87, 0x78, 0x13}},
+	{largeDataChunk()},
+}
+
+var reverseBitsTests = []*reverseBitsTest{
+	{1, 1, 1},
+	{1, 2, 2},
+	{1, 3, 4},
+	{1, 4, 8},
+	{1, 5, 16},
+	{17, 5, 17},
+	{257, 9, 257},
+	{29, 5, 23},
+}
+
+func largeDataChunk() []byte {
+	result := make([]byte, 100000)
+	for i := range result {
+		result[i] = byte(i * i & 0xFF)
+	}
+	return result
+}
+
+func TestBulkHash4(t *testing.T) {
+	for _, x := range deflateTests {
+		y := x.out
+		if len(y) >= minMatchLength {
+			y = append(y, y...)
+			for j := 4; j < len(y); j++ {
+				y := y[:j]
+				dst := make([]uint32, len(y)-minMatchLength+1)
+				for i := range dst {
+					dst[i] = uint32(i + 100)
+				}
+				bulkHash4(y, dst)
+				for i, val := range dst {
+					got := val
+					expect := hash4(y[i:])
+					if got != expect && got == uint32(i)+100 {
+						t.Errorf("Len:%d Index:%d, expected 0x%08x but not modified", len(y), i, expect)
+					} else if got != expect {
+						t.Errorf("Len:%d Index:%d, got 0x%08x expected:0x%08x", len(y), i, got, expect)
+					} else {
+						//t.Logf("Len:%d Index:%d OK (0x%08x)", len(y), i, got)
+					}
+				}
+			}
+		}
+	}
+}
+
+func TestDeflate(t *testing.T) {
+	for i, h := range deflateTests {
+		var buf bytes.Buffer
+		w, err := NewWriter(&buf, h.level)
+		if err != nil {
+			t.Errorf("NewWriter: %v", err)
+			continue
+		}
+		w.Write(h.in)
+		w.Close()
+		if !bytes.Equal(buf.Bytes(), h.out) {
+			t.Errorf("%d: Deflate(%d, %x) got \n%#v, want \n%#v", i, h.level, h.in, buf.Bytes(), h.out)
+		}
+	}
+}
+
+// A sparseReader returns a stream consisting of 0s followed by 1<<16 1s.
+// This tests missing hash references in a very large input.
+type sparseReader struct {
+	l   int64
+	cur int64
+}
+
+func (r *sparseReader) Read(b []byte) (n int, err error) {
+	if r.cur >= r.l {
+		return 0, io.EOF
+	}
+	n = len(b)
+	cur := r.cur + int64(n)
+	if cur > r.l {
+		n -= int(cur - r.l)
+		cur = r.l
+	}
+	for i := range b[0:n] {
+		if r.cur+int64(i) >= r.l-1<<16 {
+			b[i] = 1
+		} else {
+			b[i] = 0
+		}
+	}
+	r.cur = cur
+	return
+}
+
+func TestVeryLongSparseChunk(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping sparse chunk during short test")
+	}
+	var buf bytes.Buffer
+	w, err := NewWriter(&buf, 1)
+	if err != nil {
+		t.Errorf("NewWriter: %v", err)
+		return
+	}
+	if _, err = io.Copy(w, &sparseReader{l: 23e8}); err != nil {
+		t.Errorf("Compress failed: %v", err)
+		return
+	}
+	t.Log("Length:", buf.Len())
+}
+
+type syncBuffer struct {
+	buf    bytes.Buffer
+	mu     sync.RWMutex
+	closed bool
+	ready  chan bool
+}
+
+func newSyncBuffer() *syncBuffer {
+	return &syncBuffer{ready: make(chan bool, 1)}
+}
+
+func (b *syncBuffer) Read(p []byte) (n int, err error) {
+	for {
+		b.mu.RLock()
+		n, err = b.buf.Read(p)
+		b.mu.RUnlock()
+		if n > 0 || b.closed {
+			return
+		}
+		<-b.ready
+	}
+}
+
+func (b *syncBuffer) signal() {
+	select {
+	case b.ready <- true:
+	default:
+	}
+}
+
+func (b *syncBuffer) Write(p []byte) (n int, err error) {
+	n, err = b.buf.Write(p)
+	b.signal()
+	return
+}
+
+func (b *syncBuffer) WriteMode() {
+	b.mu.Lock()
+}
+
+func (b *syncBuffer) ReadMode() {
+	b.mu.Unlock()
+	b.signal()
+}
+
+func (b *syncBuffer) Close() error {
+	b.closed = true
+	b.signal()
+	return nil
+}
+
+func testSync(t *testing.T, level int, input []byte, name string) {
+	if len(input) == 0 {
+		return
+	}
+
+	t.Logf("--testSync %d, %d, %s", level, len(input), name)
+	buf := newSyncBuffer()
+	buf1 := new(bytes.Buffer)
+	buf.WriteMode()
+	w, err := NewWriter(io.MultiWriter(buf, buf1), level)
+	if err != nil {
+		t.Errorf("NewWriter: %v", err)
+		return
+	}
+	r := NewReader(buf)
+
+	// Write half the input and read back.
+	for i := 0; i < 2; i++ {
+		var lo, hi int
+		if i == 0 {
+			lo, hi = 0, (len(input)+1)/2
+		} else {
+			lo, hi = (len(input)+1)/2, len(input)
+		}
+		t.Logf("#%d: write %d-%d", i, lo, hi)
+		if _, err := w.Write(input[lo:hi]); err != nil {
+			t.Errorf("testSync: write: %v", err)
+			return
+		}
+		if i == 0 {
+			if err := w.Flush(); err != nil {
+				t.Errorf("testSync: flush: %v", err)
+				return
+			}
+		} else {
+			if err := w.Close(); err != nil {
+				t.Errorf("testSync: close: %v", err)
+			}
+		}
+		buf.ReadMode()
+		out := make([]byte, hi-lo+1)
+		m, err := io.ReadAtLeast(r, out, hi-lo)
+		t.Logf("#%d: read %d", i, m)
+		if m != hi-lo || err != nil {
+			t.Errorf("testSync/%d (%d, %d, %s): read %d: %d, %v (%d left)", i, level, len(input), name, hi-lo, m, err, buf.buf.Len())
+			return
+		}
+		if !bytes.Equal(input[lo:hi], out[:hi-lo]) {
+			t.Errorf("testSync/%d: read wrong bytes: %x vs %x", i, input[lo:hi], out[:hi-lo])
+			return
+		}
+		// This test originally checked that after reading
+		// the first half of the input, there was nothing left
+		// in the read buffer (buf.buf.Len() != 0) but that is
+		// not necessarily the case: the write Flush may emit
+		// some extra framing bits that are not necessary
+		// to process to obtain the first half of the uncompressed
+		// data.  The test ran correctly most of the time, because
+		// the background goroutine had usually read even
+		// those extra bits by now, but it's not a useful thing to
+		// check.
+		buf.WriteMode()
+	}
+	buf.ReadMode()
+	out := make([]byte, 10)
+	if n, err := r.Read(out); n > 0 || err != io.EOF {
+		t.Errorf("testSync (%d, %d, %s): final Read: %d, %v (hex: %x)", level, len(input), name, n, err, out[0:n])
+	}
+	if buf.buf.Len() != 0 {
+		t.Errorf("testSync (%d, %d, %s): extra data at end", level, len(input), name)
+	}
+	r.Close()
+
+	// stream should work for ordinary reader too
+	r = NewReader(buf1)
+	out, err = io.ReadAll(r)
+	if err != nil {
+		t.Errorf("testSync: read: %s", err)
+		return
+	}
+	r.Close()
+	if !bytes.Equal(input, out) {
+		t.Errorf("testSync: decompress(compress(data)) != data: level=%d input=%s", level, name)
+	}
+}
+
+func testToFromWithLevelAndLimit(t *testing.T, level int, input []byte, name string, limit int) {
+	var buffer bytes.Buffer
+	w, err := NewWriter(&buffer, level)
+	if err != nil {
+		t.Errorf("NewWriter: %v", err)
+		return
+	}
+	w.Write(input)
+	w.Close()
+	if limit > 0 {
+		t.Logf("level: %d - Size:%.2f%%, %d b\n", level, float64(buffer.Len()*100)/float64(limit), buffer.Len())
+	}
+	if limit > 0 && buffer.Len() > limit {
+		t.Errorf("level: %d, len(compress(data)) = %d > limit = %d", level, buffer.Len(), limit)
+	}
+
+	r := NewReader(&buffer)
+	out, err := io.ReadAll(r)
+	if err != nil {
+		t.Errorf("read: %s", err)
+		return
+	}
+	r.Close()
+	if !bytes.Equal(input, out) {
+		os.WriteFile("testdata/fails/"+t.Name()+".got", out, os.ModePerm)
+		os.WriteFile("testdata/fails/"+t.Name()+".want", input, os.ModePerm)
+		t.Errorf("decompress(compress(data)) != data: level=%d input=%s", level, name)
+		return
+	}
+	testSync(t, level, input, name)
+}
+
+func testToFromWithLimit(t *testing.T, input []byte, name string, limit [11]int) {
+	for i := 0; i < 10; i++ {
+		testToFromWithLevelAndLimit(t, i, input, name, limit[i])
+	}
+	testToFromWithLevelAndLimit(t, -2, input, name, limit[10])
+}
+
+func TestDeflateInflate(t *testing.T) {
+	for i, h := range deflateInflateTests {
+		testToFromWithLimit(t, h.in, fmt.Sprintf("#%d", i), [11]int{})
+	}
+}
+
+func TestReverseBits(t *testing.T) {
+	for _, h := range reverseBitsTests {
+		if v := reverseBits(h.in, h.bitCount); v != h.out {
+			t.Errorf("reverseBits(%v,%v) = %v, want %v",
+				h.in, h.bitCount, v, h.out)
+		}
+	}
+}
+
+type deflateInflateStringTest struct {
+	filename string
+	label    string
+	limit    [11]int // Number 11 is ConstantCompression
+}
+
+var deflateInflateStringTests = []deflateInflateStringTest{
+	{
+		"../testdata/e.txt",
+		"2.718281828...",
+		[...]int{100018, 67900, 50960, 51150, 50930, 50790, 50790, 50790, 50790, 50790, 43683 + 100},
+	},
+	{
+		"../testdata/Mark.Twain-Tom.Sawyer.txt",
+		"Mark.Twain-Tom.Sawyer",
+		[...]int{387999, 185000, 182361, 179974, 174124, 168819, 162936, 160506, 160295, 160295, 233460 + 100},
+	},
+}
+
+func TestDeflateInflateString(t *testing.T) {
+	for _, test := range deflateInflateStringTests {
+		gold, err := os.ReadFile(test.filename)
+		if err != nil {
+			t.Error(err)
+		}
+		// Remove returns that may be present on Windows
+		neutral := strings.Map(func(r rune) rune {
+			if r != '\r' {
+				return r
+			}
+			return -1
+		}, string(gold))
+
+		testToFromWithLimit(t, []byte(neutral), test.label, test.limit)
+
+		if testing.Short() {
+			break
+		}
+	}
+}
+
+func TestReaderDict(t *testing.T) {
+	const (
+		dict = "hello world"
+		text = "hello again world"
+	)
+	var b bytes.Buffer
+	w, err := NewWriter(&b, 5)
+	if err != nil {
+		t.Fatalf("NewWriter: %v", err)
+	}
+	w.Write([]byte(dict))
+	w.Flush()
+	b.Reset()
+	w.Write([]byte(text))
+	w.Close()
+
+	r := NewReaderDict(&b, []byte(dict))
+	data, err := io.ReadAll(r)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(data) != "hello again world" {
+		t.Fatalf("read returned %q want %q", string(data), text)
+	}
+}
+
+func TestWriterDict(t *testing.T) {
+	const (
+		dict = "hello world Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
+		text = "hello world Lorem ipsum dolor sit amet"
+	)
+	// This test is sensitive to algorithm changes that skip
+	// data in favour of speed. Higher levels are less prone to this
+	// so we test level 4-9.
+	for l := 4; l < 9; l++ {
+		var b bytes.Buffer
+		w, err := NewWriter(&b, l)
+		if err != nil {
+			t.Fatalf("level %d, NewWriter: %v", l, err)
+		}
+		w.Write([]byte(dict))
+		w.Flush()
+		b.Reset()
+		w.Write([]byte(text))
+		w.Close()
+
+		var b1 bytes.Buffer
+		w, _ = NewWriterDict(&b1, l, []byte(dict))
+		w.Write([]byte(text))
+		w.Close()
+
+		if !bytes.Equal(b1.Bytes(), b.Bytes()) {
+			t.Errorf("level %d, writer wrote\n%v\n want\n%v", l, b1.Bytes(), b.Bytes())
+		}
+	}
+}
+
+// See http://code.google.com/p/go/issues/detail?id=2508
+func TestRegression2508(t *testing.T) {
+	if testing.Short() {
+		t.Logf("test disabled with -short")
+		return
+	}
+	w, err := NewWriter(io.Discard, 1)
+	if err != nil {
+		t.Fatalf("NewWriter: %v", err)
+	}
+	buf := make([]byte, 1024)
+	for i := 0; i < 131072; i++ {
+		if _, err := w.Write(buf); err != nil {
+			t.Fatalf("writer failed: %v", err)
+		}
+	}
+	w.Close()
+}
+
+func TestWriterReset(t *testing.T) {
+	for level := -2; level <= 9; level++ {
+		if level == -1 {
+			level++
+		}
+		if testing.Short() && level > 1 {
+			break
+		}
+		w, err := NewWriter(io.Discard, level)
+		if err != nil {
+			t.Fatalf("NewWriter: %v", err)
+		}
+		buf := []byte("hello world")
+		for i := 0; i < 1024; i++ {
+			w.Write(buf)
+		}
+		w.Reset(io.Discard)
+
+		wref, err := NewWriter(io.Discard, level)
+		if err != nil {
+			t.Fatalf("NewWriter: %v", err)
+		}
+
+		// DeepEqual doesn't compare functions.
+		w.d.fill, wref.d.fill = nil, nil
+		w.d.step, wref.d.step = nil, nil
+		w.d.state, wref.d.state = nil, nil
+		w.d.fast, wref.d.fast = nil, nil
+
+		// hashMatch is always overwritten when used.
+		if w.d.tokens.n != 0 {
+			t.Errorf("level %d Writer not reset after Reset. %d tokens were present", level, w.d.tokens.n)
+		}
+		// As long as the length is 0, we don't care about the content.
+		w.d.tokens = wref.d.tokens
+
+		// We don't care if there are values in the window, as long as it is at d.index is 0
+		w.d.window = wref.d.window
+		if !reflect.DeepEqual(w, wref) {
+			t.Errorf("level %d Writer not reset after Reset", level)
+		}
+	}
+
+	for i := HuffmanOnly; i <= BestCompression; i++ {
+		testResetOutput(t, fmt.Sprint("level-", i), func(w io.Writer) (*Writer, error) { return NewWriter(w, i) })
+	}
+	dict := []byte(strings.Repeat("we are the world - how are you?", 3))
+	for i := HuffmanOnly; i <= BestCompression; i++ {
+		testResetOutput(t, fmt.Sprint("dict-level-", i), func(w io.Writer) (*Writer, error) { return NewWriterDict(w, i, dict) })
+	}
+	for i := HuffmanOnly; i <= BestCompression; i++ {
+		testResetOutput(t, fmt.Sprint("dict-reset-level-", i), func(w io.Writer) (*Writer, error) {
+			w2, err := NewWriter(nil, i)
+			if err != nil {
+				return w2, err
+			}
+			w2.ResetDict(w, dict)
+			return w2, nil
+		})
+	}
+}
+
+func testResetOutput(t *testing.T, name string, newWriter func(w io.Writer) (*Writer, error)) {
+	t.Run(name, func(t *testing.T) {
+		buf := new(bytes.Buffer)
+		w, err := newWriter(buf)
+		if err != nil {
+			t.Fatalf("NewWriter: %v", err)
+		}
+		b := []byte("hello world - how are you doing?")
+		for i := 0; i < 1024; i++ {
+			w.Write(b)
+		}
+		w.Close()
+		out1 := buf.Bytes()
+
+		buf2 := new(bytes.Buffer)
+		w.Reset(buf2)
+		for i := 0; i < 1024; i++ {
+			w.Write(b)
+		}
+		w.Close()
+		out2 := buf2.Bytes()
+
+		if len(out1) != len(out2) {
+			t.Errorf("got %d, expected %d bytes", len(out2), len(out1))
+		}
+		if !bytes.Equal(out1, out2) {
+			mm := 0
+			for i, b := range out1[:len(out2)] {
+				if b != out2[i] {
+					t.Errorf("mismatch index %d: %02x, expected %02x", i, out2[i], b)
+				}
+				mm++
+				if mm == 10 {
+					t.Fatal("Stopping")
+				}
+			}
+		}
+		t.Logf("got %d bytes", len(out1))
+	})
+}
+
+// TestBestSpeed tests that round-tripping through deflate and then inflate
+// recovers the original input. The Write sizes are near the thresholds in the
+// compressor.encSpeed method (0, 16, 128), as well as near maxStoreBlockSize
+// (65535).
+func TestBestSpeed(t *testing.T) {
+	abc := make([]byte, 128)
+	for i := range abc {
+		abc[i] = byte(i)
+	}
+	abcabc := bytes.Repeat(abc, 131072/len(abc))
+	var want []byte
+
+	testCases := [][]int{
+		{65536, 0},
+		{65536, 1},
+		{65536, 1, 256},
+		{65536, 1, 65536},
+		{65536, 14},
+		{65536, 15},
+		{65536, 16},
+		{65536, 16, 256},
+		{65536, 16, 65536},
+		{65536, 127},
+		{65536, 128},
+		{65536, 128, 256},
+		{65536, 128, 65536},
+		{65536, 129},
+		{65536, 65536, 256},
+		{65536, 65536, 65536},
+	}
+
+	for i, tc := range testCases {
+		if testing.Short() && i > 5 {
+			t.Skip()
+		}
+		for _, firstN := range []int{1, 65534, 65535, 65536, 65537, 131072} {
+			tc[0] = firstN
+		outer:
+			for _, flush := range []bool{false, true} {
+				buf := new(bytes.Buffer)
+				want = want[:0]
+
+				w, err := NewWriter(buf, BestSpeed)
+				if err != nil {
+					t.Errorf("i=%d, firstN=%d, flush=%t: NewWriter: %v", i, firstN, flush, err)
+					continue
+				}
+				for _, n := range tc {
+					want = append(want, abcabc[:n]...)
+					if _, err := w.Write(abcabc[:n]); err != nil {
+						t.Errorf("i=%d, firstN=%d, flush=%t: Write: %v", i, firstN, flush, err)
+						continue outer
+					}
+					if !flush {
+						continue
+					}
+					if err := w.Flush(); err != nil {
+						t.Errorf("i=%d, firstN=%d, flush=%t: Flush: %v", i, firstN, flush, err)
+						continue outer
+					}
+				}
+				if err := w.Close(); err != nil {
+					t.Errorf("i=%d, firstN=%d, flush=%t: Close: %v", i, firstN, flush, err)
+					continue
+				}
+
+				r := NewReader(buf)
+				got, err := io.ReadAll(r)
+				if err != nil {
+					t.Errorf("i=%d, firstN=%d, flush=%t: ReadAll: %v", i, firstN, flush, err)
+					continue
+				}
+				r.Close()
+
+				if !bytes.Equal(got, want) {
+					t.Errorf("i=%d, firstN=%d, flush=%t: corruption during deflate-then-inflate", i, firstN, flush)
+					continue
+				}
+			}
+		}
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/dict_decoder.go b/vendor/github.com/klauspost/compress/flate/dict_decoder.go
new file mode 100644
index 0000000000..bb36351a5a
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/dict_decoder.go
@@ -0,0 +1,184 @@
+// 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 flate
+
+// dictDecoder implements the LZ77 sliding dictionary as used in decompression.
+// LZ77 decompresses data through sequences of two forms of commands:
+//
+//   - Literal insertions: Runs of one or more symbols are inserted into the data
+//     stream as is. This is accomplished through the writeByte method for a
+//     single symbol, or combinations of writeSlice/writeMark for multiple symbols.
+//     Any valid stream must start with a literal insertion if no preset dictionary
+//     is used.
+//
+//   - Backward copies: Runs of one or more symbols are copied from previously
+//     emitted data. Backward copies come as the tuple (dist, length) where dist
+//     determines how far back in the stream to copy from and length determines how
+//     many bytes to copy. Note that it is valid for the length to be greater than
+//     the distance. Since LZ77 uses forward copies, that situation is used to
+//     perform a form of run-length encoding on repeated runs of symbols.
+//     The writeCopy and tryWriteCopy are used to implement this command.
+//
+// For performance reasons, this implementation performs little to no sanity
+// checks about the arguments. As such, the invariants documented for each
+// method call must be respected.
+type dictDecoder struct {
+	hist []byte // Sliding window history
+
+	// Invariant: 0 <= rdPos <= wrPos <= len(hist)
+	wrPos int  // Current output position in buffer
+	rdPos int  // Have emitted hist[:rdPos] already
+	full  bool // Has a full window length been written yet?
+}
+
+// init initializes dictDecoder to have a sliding window dictionary of the given
+// size. If a preset dict is provided, it will initialize the dictionary with
+// the contents of dict.
+func (dd *dictDecoder) init(size int, dict []byte) {
+	*dd = dictDecoder{hist: dd.hist}
+
+	if cap(dd.hist) < size {
+		dd.hist = make([]byte, size)
+	}
+	dd.hist = dd.hist[:size]
+
+	if len(dict) > len(dd.hist) {
+		dict = dict[len(dict)-len(dd.hist):]
+	}
+	dd.wrPos = copy(dd.hist, dict)
+	if dd.wrPos == len(dd.hist) {
+		dd.wrPos = 0
+		dd.full = true
+	}
+	dd.rdPos = dd.wrPos
+}
+
+// histSize reports the total amount of historical data in the dictionary.
+func (dd *dictDecoder) histSize() int {
+	if dd.full {
+		return len(dd.hist)
+	}
+	return dd.wrPos
+}
+
+// availRead reports the number of bytes that can be flushed by readFlush.
+func (dd *dictDecoder) availRead() int {
+	return dd.wrPos - dd.rdPos
+}
+
+// availWrite reports the available amount of output buffer space.
+func (dd *dictDecoder) availWrite() int {
+	return len(dd.hist) - dd.wrPos
+}
+
+// writeSlice returns a slice of the available buffer to write data to.
+//
+// This invariant will be kept: len(s) <= availWrite()
+func (dd *dictDecoder) writeSlice() []byte {
+	return dd.hist[dd.wrPos:]
+}
+
+// writeMark advances the writer pointer by cnt.
+//
+// This invariant must be kept: 0 <= cnt <= availWrite()
+func (dd *dictDecoder) writeMark(cnt int) {
+	dd.wrPos += cnt
+}
+
+// writeByte writes a single byte to the dictionary.
+//
+// This invariant must be kept: 0 < availWrite()
+func (dd *dictDecoder) writeByte(c byte) {
+	dd.hist[dd.wrPos] = c
+	dd.wrPos++
+}
+
+// writeCopy copies a string at a given (dist, length) to the output.
+// This returns the number of bytes copied and may be less than the requested
+// length if the available space in the output buffer is too small.
+//
+// This invariant must be kept: 0 < dist <= histSize()
+func (dd *dictDecoder) writeCopy(dist, length int) int {
+	dstBase := dd.wrPos
+	dstPos := dstBase
+	srcPos := dstPos - dist
+	endPos := dstPos + length
+	if endPos > len(dd.hist) {
+		endPos = len(dd.hist)
+	}
+
+	// Copy non-overlapping section after destination position.
+	//
+	// This section is non-overlapping in that the copy length for this section
+	// is always less than or equal to the backwards distance. This can occur
+	// if a distance refers to data that wraps-around in the buffer.
+	// Thus, a backwards copy is performed here; that is, the exact bytes in
+	// the source prior to the copy is placed in the destination.
+	if srcPos < 0 {
+		srcPos += len(dd.hist)
+		dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:])
+		srcPos = 0
+	}
+
+	// Copy possibly overlapping section before destination position.
+	//
+	// This section can overlap if the copy length for this section is larger
+	// than the backwards distance. This is allowed by LZ77 so that repeated
+	// strings can be succinctly represented using (dist, length) pairs.
+	// Thus, a forwards copy is performed here; that is, the bytes copied is
+	// possibly dependent on the resulting bytes in the destination as the copy
+	// progresses along. This is functionally equivalent to the following:
+	//
+	//	for i := 0; i < endPos-dstPos; i++ {
+	//		dd.hist[dstPos+i] = dd.hist[srcPos+i]
+	//	}
+	//	dstPos = endPos
+	//
+	for dstPos < endPos {
+		dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:dstPos])
+	}
+
+	dd.wrPos = dstPos
+	return dstPos - dstBase
+}
+
+// tryWriteCopy tries to copy a string at a given (distance, length) to the
+// output. This specialized version is optimized for short distances.
+//
+// This method is designed to be inlined for performance reasons.
+//
+// This invariant must be kept: 0 < dist <= histSize()
+func (dd *dictDecoder) tryWriteCopy(dist, length int) int {
+	dstPos := dd.wrPos
+	endPos := dstPos + length
+	if dstPos < dist || endPos > len(dd.hist) {
+		return 0
+	}
+	dstBase := dstPos
+	srcPos := dstPos - dist
+
+	// Copy possibly overlapping section before destination position.
+loop:
+	dstPos += copy(dd.hist[dstPos:endPos], dd.hist[srcPos:dstPos])
+	if dstPos < endPos {
+		goto loop // Avoid for-loop so that this function can be inlined
+	}
+
+	dd.wrPos = dstPos
+	return dstPos - dstBase
+}
+
+// readFlush returns a slice of the historical buffer that is ready to be
+// emitted to the user. The data returned by readFlush must be fully consumed
+// before calling any other dictDecoder methods.
+func (dd *dictDecoder) readFlush() []byte {
+	toRead := dd.hist[dd.rdPos:dd.wrPos]
+	dd.rdPos = dd.wrPos
+	if dd.wrPos == len(dd.hist) {
+		dd.wrPos, dd.rdPos = 0, 0
+		dd.full = true
+	}
+	return toRead
+}
diff --git a/vendor/github.com/klauspost/compress/flate/dict_decoder_test.go b/vendor/github.com/klauspost/compress/flate/dict_decoder_test.go
new file mode 100644
index 0000000000..9275cff791
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/dict_decoder_test.go
@@ -0,0 +1,139 @@
+// 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 flate
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestDictDecoder(t *testing.T) {
+	const (
+		abc  = "ABC\n"
+		fox  = "The quick brown fox jumped over the lazy dog!\n"
+		poem = "The Road Not Taken\nRobert Frost\n" +
+			"\n" +
+			"Two roads diverged in a yellow wood,\n" +
+			"And sorry I could not travel both\n" +
+			"And be one traveler, long I stood\n" +
+			"And looked down one as far as I could\n" +
+			"To where it bent in the undergrowth;\n" +
+			"\n" +
+			"Then took the other, as just as fair,\n" +
+			"And having perhaps the better claim,\n" +
+			"Because it was grassy and wanted wear;\n" +
+			"Though as for that the passing there\n" +
+			"Had worn them really about the same,\n" +
+			"\n" +
+			"And both that morning equally lay\n" +
+			"In leaves no step had trodden black.\n" +
+			"Oh, I kept the first for another day!\n" +
+			"Yet knowing how way leads on to way,\n" +
+			"I doubted if I should ever come back.\n" +
+			"\n" +
+			"I shall be telling this with a sigh\n" +
+			"Somewhere ages and ages hence:\n" +
+			"Two roads diverged in a wood, and I-\n" +
+			"I took the one less traveled by,\n" +
+			"And that has made all the difference.\n"
+	)
+
+	var poemRefs = []struct {
+		dist   int // Backward distance (0 if this is an insertion)
+		length int // Length of copy or insertion
+	}{
+		{0, 38}, {33, 3}, {0, 48}, {79, 3}, {0, 11}, {34, 5}, {0, 6}, {23, 7},
+		{0, 8}, {50, 3}, {0, 2}, {69, 3}, {34, 5}, {0, 4}, {97, 3}, {0, 4},
+		{43, 5}, {0, 6}, {7, 4}, {88, 7}, {0, 12}, {80, 3}, {0, 2}, {141, 4},
+		{0, 1}, {196, 3}, {0, 3}, {157, 3}, {0, 6}, {181, 3}, {0, 2}, {23, 3},
+		{77, 3}, {28, 5}, {128, 3}, {110, 4}, {70, 3}, {0, 4}, {85, 6}, {0, 2},
+		{182, 6}, {0, 4}, {133, 3}, {0, 7}, {47, 5}, {0, 20}, {112, 5}, {0, 1},
+		{58, 3}, {0, 8}, {59, 3}, {0, 4}, {173, 3}, {0, 5}, {114, 3}, {0, 4},
+		{92, 5}, {0, 2}, {71, 3}, {0, 2}, {76, 5}, {0, 1}, {46, 3}, {96, 4},
+		{130, 4}, {0, 3}, {360, 3}, {0, 3}, {178, 5}, {0, 7}, {75, 3}, {0, 3},
+		{45, 6}, {0, 6}, {299, 6}, {180, 3}, {70, 6}, {0, 1}, {48, 3}, {66, 4},
+		{0, 3}, {47, 5}, {0, 9}, {325, 3}, {0, 1}, {359, 3}, {318, 3}, {0, 2},
+		{199, 3}, {0, 1}, {344, 3}, {0, 3}, {248, 3}, {0, 10}, {310, 3}, {0, 3},
+		{93, 6}, {0, 3}, {252, 3}, {157, 4}, {0, 2}, {273, 5}, {0, 14}, {99, 4},
+		{0, 1}, {464, 4}, {0, 2}, {92, 4}, {495, 3}, {0, 1}, {322, 4}, {16, 4},
+		{0, 3}, {402, 3}, {0, 2}, {237, 4}, {0, 2}, {432, 4}, {0, 1}, {483, 5},
+		{0, 2}, {294, 4}, {0, 2}, {306, 3}, {113, 5}, {0, 1}, {26, 4}, {164, 3},
+		{488, 4}, {0, 1}, {542, 3}, {248, 6}, {0, 5}, {205, 3}, {0, 8}, {48, 3},
+		{449, 6}, {0, 2}, {192, 3}, {328, 4}, {9, 5}, {433, 3}, {0, 3}, {622, 25},
+		{615, 5}, {46, 5}, {0, 2}, {104, 3}, {475, 10}, {549, 3}, {0, 4}, {597, 8},
+		{314, 3}, {0, 1}, {473, 6}, {317, 5}, {0, 1}, {400, 3}, {0, 3}, {109, 3},
+		{151, 3}, {48, 4}, {0, 4}, {125, 3}, {108, 3}, {0, 2},
+	}
+
+	var got, want bytes.Buffer
+	var dd dictDecoder
+	dd.init(1<<11, nil)
+
+	var writeCopy = func(dist, length int) {
+		for length > 0 {
+			cnt := dd.tryWriteCopy(dist, length)
+			if cnt == 0 {
+				cnt = dd.writeCopy(dist, length)
+			}
+
+			length -= cnt
+			if dd.availWrite() == 0 {
+				got.Write(dd.readFlush())
+			}
+		}
+	}
+	var writeString = func(str string) {
+		for len(str) > 0 {
+			cnt := copy(dd.writeSlice(), str)
+			str = str[cnt:]
+			dd.writeMark(cnt)
+			if dd.availWrite() == 0 {
+				got.Write(dd.readFlush())
+			}
+		}
+	}
+
+	writeString(".")
+	want.WriteByte('.')
+
+	str := poem
+	for _, ref := range poemRefs {
+		if ref.dist == 0 {
+			writeString(str[:ref.length])
+		} else {
+			writeCopy(ref.dist, ref.length)
+		}
+		str = str[ref.length:]
+	}
+	want.WriteString(poem)
+
+	writeCopy(dd.histSize(), 33)
+	want.Write(want.Bytes()[:33])
+
+	writeString(abc)
+	writeCopy(len(abc), 59*len(abc))
+	want.WriteString(strings.Repeat(abc, 60))
+
+	writeString(fox)
+	writeCopy(len(fox), 9*len(fox))
+	want.WriteString(strings.Repeat(fox, 10))
+
+	writeString(".")
+	writeCopy(1, 9)
+	want.WriteString(strings.Repeat(".", 10))
+
+	writeString(strings.ToUpper(poem))
+	writeCopy(len(poem), 7*len(poem))
+	want.WriteString(strings.Repeat(strings.ToUpper(poem), 8))
+
+	writeCopy(dd.histSize(), 10)
+	want.Write(want.Bytes()[want.Len()-dd.histSize():][:10])
+
+	got.Write(dd.readFlush())
+	if got.String() != want.String() {
+		t.Errorf("final string mismatch:\ngot  %q\nwant %q", got.String(), want.String())
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/fast_encoder.go b/vendor/github.com/klauspost/compress/flate/fast_encoder.go
new file mode 100644
index 0000000000..24caf5f70b
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/fast_encoder.go
@@ -0,0 +1,216 @@
+// Copyright 2011 The Snappy-Go Authors. All rights reserved.
+// Modified for deflate by Klaus Post (c) 2015.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package flate
+
+import (
+	"encoding/binary"
+	"fmt"
+	"math/bits"
+)
+
+type fastEnc interface {
+	Encode(dst *tokens, src []byte)
+	Reset()
+}
+
+func newFastEnc(level int) fastEnc {
+	switch level {
+	case 1:
+		return &fastEncL1{fastGen: fastGen{cur: maxStoreBlockSize}}
+	case 2:
+		return &fastEncL2{fastGen: fastGen{cur: maxStoreBlockSize}}
+	case 3:
+		return &fastEncL3{fastGen: fastGen{cur: maxStoreBlockSize}}
+	case 4:
+		return &fastEncL4{fastGen: fastGen{cur: maxStoreBlockSize}}
+	case 5:
+		return &fastEncL5{fastGen: fastGen{cur: maxStoreBlockSize}}
+	case 6:
+		return &fastEncL6{fastGen: fastGen{cur: maxStoreBlockSize}}
+	default:
+		panic("invalid level specified")
+	}
+}
+
+const (
+	tableBits       = 15             // Bits used in the table
+	tableSize       = 1 << tableBits // Size of the table
+	tableShift      = 32 - tableBits // Right-shift to get the tableBits most significant bits of a uint32.
+	baseMatchOffset = 1              // The smallest match offset
+	baseMatchLength = 3              // The smallest match length per the RFC section 3.2.5
+	maxMatchOffset  = 1 << 15        // The largest match offset
+
+	bTableBits   = 17                                               // Bits used in the big tables
+	bTableSize   = 1 << bTableBits                                  // Size of the table
+	allocHistory = maxStoreBlockSize * 5                            // Size to preallocate for history.
+	bufferReset  = (1 << 31) - allocHistory - maxStoreBlockSize - 1 // Reset the buffer offset when reaching this.
+)
+
+const (
+	prime3bytes = 506832829
+	prime4bytes = 2654435761
+	prime5bytes = 889523592379
+	prime6bytes = 227718039650203
+	prime7bytes = 58295818150454627
+	prime8bytes = 0xcf1bbcdcb7a56463
+)
+
+func load3232(b []byte, i int32) uint32 {
+	return binary.LittleEndian.Uint32(b[i:])
+}
+
+func load6432(b []byte, i int32) uint64 {
+	return binary.LittleEndian.Uint64(b[i:])
+}
+
+type tableEntry struct {
+	offset int32
+}
+
+// fastGen maintains the table for matches,
+// and the previous byte block for level 2.
+// This is the generic implementation.
+type fastGen struct {
+	hist []byte
+	cur  int32
+}
+
+func (e *fastGen) addBlock(src []byte) int32 {
+	// check if we have space already
+	if len(e.hist)+len(src) > cap(e.hist) {
+		if cap(e.hist) == 0 {
+			e.hist = make([]byte, 0, allocHistory)
+		} else {
+			if cap(e.hist) < maxMatchOffset*2 {
+				panic("unexpected buffer size")
+			}
+			// Move down
+			offset := int32(len(e.hist)) - maxMatchOffset
+			// copy(e.hist[0:maxMatchOffset], e.hist[offset:])
+			*(*[maxMatchOffset]byte)(e.hist) = *(*[maxMatchOffset]byte)(e.hist[offset:])
+			e.cur += offset
+			e.hist = e.hist[:maxMatchOffset]
+		}
+	}
+	s := int32(len(e.hist))
+	e.hist = append(e.hist, src...)
+	return s
+}
+
+type tableEntryPrev struct {
+	Cur  tableEntry
+	Prev tableEntry
+}
+
+// hash7 returns the hash of the lowest 7 bytes of u to fit in a hash table with h bits.
+// Preferably h should be a constant and should always be <64.
+func hash7(u uint64, h uint8) uint32 {
+	return uint32(((u << (64 - 56)) * prime7bytes) >> ((64 - h) & reg8SizeMask64))
+}
+
+// hashLen returns a hash of the lowest mls bytes of with length output bits.
+// mls must be >=3 and <=8. Any other value will return hash for 4 bytes.
+// length should always be < 32.
+// Preferably length and mls should be a constant for inlining.
+func hashLen(u uint64, length, mls uint8) uint32 {
+	switch mls {
+	case 3:
+		return (uint32(u<<8) * prime3bytes) >> (32 - length)
+	case 5:
+		return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length))
+	case 6:
+		return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length))
+	case 7:
+		return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length))
+	case 8:
+		return uint32((u * prime8bytes) >> (64 - length))
+	default:
+		return (uint32(u) * prime4bytes) >> (32 - length)
+	}
+}
+
+// matchlen will return the match length between offsets and t in src.
+// The maximum length returned is maxMatchLength - 4.
+// It is assumed that s > t, that t >=0 and s < len(src).
+func (e *fastGen) matchlen(s, t int32, src []byte) int32 {
+	if debugDecode {
+		if t >= s {
+			panic(fmt.Sprint("t >=s:", t, s))
+		}
+		if int(s) >= len(src) {
+			panic(fmt.Sprint("s >= len(src):", s, len(src)))
+		}
+		if t < 0 {
+			panic(fmt.Sprint("t < 0:", t))
+		}
+		if s-t > maxMatchOffset {
+			panic(fmt.Sprint(s, "-", t, "(", s-t, ") > maxMatchLength (", maxMatchOffset, ")"))
+		}
+	}
+	s1 := int(s) + maxMatchLength - 4
+	if s1 > len(src) {
+		s1 = len(src)
+	}
+
+	// Extend the match to be as long as possible.
+	return int32(matchLen(src[s:s1], src[t:]))
+}
+
+// matchlenLong will return the match length between offsets and t in src.
+// It is assumed that s > t, that t >=0 and s < len(src).
+func (e *fastGen) matchlenLong(s, t int32, src []byte) int32 {
+	if debugDeflate {
+		if t >= s {
+			panic(fmt.Sprint("t >=s:", t, s))
+		}
+		if int(s) >= len(src) {
+			panic(fmt.Sprint("s >= len(src):", s, len(src)))
+		}
+		if t < 0 {
+			panic(fmt.Sprint("t < 0:", t))
+		}
+		if s-t > maxMatchOffset {
+			panic(fmt.Sprint(s, "-", t, "(", s-t, ") > maxMatchLength (", maxMatchOffset, ")"))
+		}
+	}
+	// Extend the match to be as long as possible.
+	return int32(matchLen(src[s:], src[t:]))
+}
+
+// Reset the encoding table.
+func (e *fastGen) Reset() {
+	if cap(e.hist) < allocHistory {
+		e.hist = make([]byte, 0, allocHistory)
+	}
+	// We offset current position so everything will be out of reach.
+	// If we are above the buffer reset it will be cleared anyway since len(hist) == 0.
+	if e.cur <= bufferReset {
+		e.cur += maxMatchOffset + int32(len(e.hist))
+	}
+	e.hist = e.hist[:0]
+}
+
+// matchLen returns the maximum length.
+// 'a' must be the shortest of the two.
+func matchLen(a, b []byte) int {
+	var checked int
+
+	for len(a) >= 8 {
+		if diff := binary.LittleEndian.Uint64(a) ^ binary.LittleEndian.Uint64(b); diff != 0 {
+			return checked + (bits.TrailingZeros64(diff) >> 3)
+		}
+		checked += 8
+		a = a[8:]
+		b = b[8:]
+	}
+	b = b[:len(a)]
+	for i := range a {
+		if a[i] != b[i] {
+			return i + checked
+		}
+	}
+	return len(a) + checked
+}
diff --git a/vendor/github.com/klauspost/compress/flate/flate_test.go b/vendor/github.com/klauspost/compress/flate/flate_test.go
new file mode 100644
index 0000000000..9817efefd9
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/flate_test.go
@@ -0,0 +1,366 @@
+// Copyright 2009 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.
+
+// This test tests some internals of the flate package.
+// The tests in package compress/gzip serve as the
+// end-to-end test of the decompressor.
+
+package flate
+
+import (
+	"archive/zip"
+	"bytes"
+	"compress/flate"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"os"
+	"testing"
+)
+
+// The following test should not panic.
+func TestIssue5915(t *testing.T) {
+	bits := []int{4, 0, 0, 6, 4, 3, 2, 3, 3, 4, 4, 5, 0, 0, 0, 0, 5, 5, 6,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 8, 6, 0, 11, 0, 8, 0, 6, 6, 10, 8}
+	var h huffmanDecoder
+	if h.init(bits) {
+		t.Fatalf("Given sequence of bits is bad, and should not succeed.")
+	}
+}
+
+// The following test should not panic.
+func TestIssue5962(t *testing.T) {
+	bits := []int{4, 0, 0, 6, 4, 3, 2, 3, 3, 4, 4, 5, 0, 0, 0, 0,
+		5, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11}
+	var h huffmanDecoder
+	if h.init(bits) {
+		t.Fatalf("Given sequence of bits is bad, and should not succeed.")
+	}
+}
+
+// The following test should not panic.
+func TestIssue6255(t *testing.T) {
+	bits1 := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11}
+	bits2 := []int{11, 13}
+	var h huffmanDecoder
+	if !h.init(bits1) {
+		t.Fatalf("Given sequence of bits is good and should succeed.")
+	}
+	if h.init(bits2) {
+		t.Fatalf("Given sequence of bits is bad and should not succeed.")
+	}
+}
+
+func TestInvalidEncoding(t *testing.T) {
+	// Initialize Huffman decoder to recognize "0".
+	var h huffmanDecoder
+	if !h.init([]int{1}) {
+		t.Fatal("Failed to initialize Huffman decoder")
+	}
+
+	// Initialize decompressor with invalid Huffman coding.
+	var f decompressor
+	f.r = bytes.NewReader([]byte{0xff})
+
+	_, err := f.huffSym(&h)
+	if err == nil {
+		t.Fatal("Should have rejected invalid bit sequence")
+	}
+}
+
+func TestRegressions(t *testing.T) {
+	// Test fuzzer regressions
+	data, err := os.ReadFile("testdata/regression.zip")
+	if err != nil {
+		t.Fatal(err)
+	}
+	zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, tt := range zr.File {
+		data, err := tt.Open()
+		if err != nil {
+			t.Fatal(err)
+		}
+		data1, err := io.ReadAll(data)
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Run(tt.Name, func(t *testing.T) {
+			if testing.Short() && len(data1) > 10000 {
+				t.SkipNow()
+			}
+			for level := 0; level <= 9; level++ {
+				t.Run(fmt.Sprint(tt.Name+"-level", 1), func(t *testing.T) {
+					buf := new(bytes.Buffer)
+					fw, err := NewWriter(buf, level)
+					if err != nil {
+						t.Error(err)
+					}
+					n, err := fw.Write(data1)
+					if n != len(data1) {
+						t.Error("short write")
+					}
+					if err != nil {
+						t.Error(err)
+					}
+					err = fw.Close()
+					if err != nil {
+						t.Error(err)
+					}
+					fr1 := NewReader(buf)
+					data2, err := io.ReadAll(fr1)
+					if err != nil {
+						t.Error(err)
+					}
+					if !bytes.Equal(data1, data2) {
+						t.Error("not equal")
+					}
+					// Do it again...
+					buf.Reset()
+					fw.Reset(buf)
+					n, err = fw.Write(data1)
+					if n != len(data1) {
+						t.Error("short write")
+					}
+					if err != nil {
+						t.Error(err)
+					}
+					err = fw.Close()
+					if err != nil {
+						t.Error(err)
+					}
+					fr1 = flate.NewReader(buf)
+					data2, err = io.ReadAll(fr1)
+					if err != nil {
+						t.Error(err)
+					}
+					if !bytes.Equal(data1, data2) {
+						t.Error("not equal")
+					}
+				})
+			}
+			t.Run(tt.Name+"stateless", func(t *testing.T) {
+				// Split into two and use history...
+				buf := new(bytes.Buffer)
+				err = StatelessDeflate(buf, data1[:len(data1)/2], false, nil)
+				if err != nil {
+					t.Error(err)
+				}
+
+				// Use top half as dictionary...
+				dict := data1[:len(data1)/2]
+				err = StatelessDeflate(buf, data1[len(data1)/2:], true, dict)
+				if err != nil {
+					t.Error(err)
+				}
+				t.Log(buf.Len())
+				fr1 := NewReader(buf)
+				data2, err := io.ReadAll(fr1)
+				if err != nil {
+					t.Error(err)
+				}
+				if !bytes.Equal(data1, data2) {
+					//fmt.Printf("want:%x\ngot: %x\n", data1, data2)
+					t.Error("not equal")
+				}
+			})
+		})
+	}
+}
+
+func TestInvalidBits(t *testing.T) {
+	oversubscribed := []int{1, 2, 3, 4, 4, 5}
+	incomplete := []int{1, 2, 4, 4}
+	var h huffmanDecoder
+	if h.init(oversubscribed) {
+		t.Fatal("Should reject oversubscribed bit-length set")
+	}
+	if h.init(incomplete) {
+		t.Fatal("Should reject incomplete bit-length set")
+	}
+}
+
+func TestStreams(t *testing.T) {
+	// To verify any of these hexstrings as valid or invalid flate streams
+	// according to the C zlib library, you can use the Python wrapper library:
+	// >>> hex_string = "010100feff11"
+	// >>> import zlib
+	// >>> zlib.decompress(hex_string.decode("hex"), -15) # Negative means raw DEFLATE
+	// '\x11'
+
+	testCases := []struct {
+		desc   string // Description of the stream
+		stream string // Hexstring of the input DEFLATE stream
+		want   string // Expected result. Use "fail" to expect failure
+	}{{
+		"degenerate HCLenTree",
+		"05e0010000000000100000000000000000000000000000000000000000000000" +
+			"00000000000000000004",
+		"fail",
+	}, {
+		"complete HCLenTree, empty HLitTree, empty HDistTree",
+		"05e0010400000000000000000000000000000000000000000000000000000000" +
+			"00000000000000000010",
+		"fail",
+	}, {
+		"empty HCLenTree",
+		"05e0010000000000000000000000000000000000000000000000000000000000" +
+			"00000000000000000010",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree, empty HDistTree, use missing HDist symbol",
+		"000100feff000de0010400000000100000000000000000000000000000000000" +
+			"0000000000000000000000000000002c",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree, degenerate HDistTree, use missing HDist symbol",
+		"000100feff000de0010000000000000000000000000000000000000000000000" +
+			"00000000000000000610000000004070",
+		"fail",
+	}, {
+		"complete HCLenTree, empty HLitTree, empty HDistTree",
+		"05e0010400000000100400000000000000000000000000000000000000000000" +
+			"0000000000000000000000000008",
+		"fail",
+	}, {
+		"complete HCLenTree, empty HLitTree, degenerate HDistTree",
+		"05e0010400000000100400000000000000000000000000000000000000000000" +
+			"0000000000000000000800000008",
+		"fail",
+	}, {
+		"complete HCLenTree, degenerate HLitTree, degenerate HDistTree, use missing HLit symbol",
+		"05e0010400000000100000000000000000000000000000000000000000000000" +
+			"0000000000000000001c",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree, too large HDistTree",
+		"edff870500000000200400000000000000000000000000000000000000000000" +
+			"000000000000000000080000000000000004",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree, empty HDistTree, excessive repeater code",
+		"edfd870500000000200400000000000000000000000000000000000000000000" +
+			"000000000000000000e8b100",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree, empty HDistTree of normal length 30",
+		"05fd01240000000000f8ffffffffffffffffffffffffffffffffffffffffffff" +
+			"ffffffffffffffffff07000000fe01",
+		"",
+	}, {
+		"complete HCLenTree, complete HLitTree, empty HDistTree of excessive length 31",
+		"05fe01240000000000f8ffffffffffffffffffffffffffffffffffffffffffff" +
+			"ffffffffffffffffff07000000fc03",
+		"fail",
+	}, {
+		"complete HCLenTree, over-subscribed HLitTree, empty HDistTree",
+		"05e001240000000000fcffffffffffffffffffffffffffffffffffffffffffff" +
+			"ffffffffffffffffff07f00f",
+		"fail",
+	}, {
+		"complete HCLenTree, under-subscribed HLitTree, empty HDistTree",
+		"05e001240000000000fcffffffffffffffffffffffffffffffffffffffffffff" +
+			"fffffffffcffffffff07f00f",
+		"fail",
+	}, {
+		"complete HCLenTree, complete HLitTree with single code, empty HDistTree",
+		"05e001240000000000f8ffffffffffffffffffffffffffffffffffffffffffff" +
+			"ffffffffffffffffff07f00f",
+		"01",
+	}, {
+		"complete HCLenTree, complete HLitTree with multiple codes, empty HDistTree",
+		"05e301240000000000f8ffffffffffffffffffffffffffffffffffffffffffff" +
+			"ffffffffffffffffff07807f",
+		"01",
+	}, {
+		"complete HCLenTree, complete HLitTree, degenerate HDistTree, use valid HDist symbol",
+		"000100feff000de0010400000000100000000000000000000000000000000000" +
+			"0000000000000000000000000000003c",
+		"00000000",
+	}, {
+		"complete HCLenTree, degenerate HLitTree, degenerate HDistTree",
+		"05e0010400000000100000000000000000000000000000000000000000000000" +
+			"0000000000000000000c",
+		"",
+	}, {
+		"complete HCLenTree, degenerate HLitTree, empty HDistTree",
+		"05e0010400000000100000000000000000000000000000000000000000000000" +
+			"00000000000000000004",
+		"",
+	}, {
+		"complete HCLenTree, complete HLitTree, empty HDistTree, spanning repeater code",
+		"edfd870500000000200400000000000000000000000000000000000000000000" +
+			"000000000000000000e8b000",
+		"",
+	}, {
+		"complete HCLenTree with length codes, complete HLitTree, empty HDistTree",
+		"ede0010400000000100000000000000000000000000000000000000000000000" +
+			"0000000000000000000400004000",
+		"",
+	}, {
+		"complete HCLenTree, complete HLitTree, degenerate HDistTree, use valid HLit symbol 284 with count 31",
+		"000100feff00ede0010400000000100000000000000000000000000000000000" +
+			"000000000000000000000000000000040000407f00",
+		"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"0000000000000000000000000000000000000000000000000000000000000000" +
+			"000000",
+	}, {
+		"complete HCLenTree, complete HLitTree, degenerate HDistTree, use valid HLit and HDist symbols",
+		"0cc2010d00000082b0ac4aff0eb07d27060000ffff",
+		"616263616263",
+	}, {
+		"fixed block, use reserved symbol 287",
+		"33180700",
+		"fail",
+	}, {
+		"raw block",
+		"010100feff11",
+		"11",
+	}, {
+		"issue 10426 - over-subscribed HCLenTree causes a hang",
+		"344c4a4e494d4b070000ff2e2eff2e2e2e2e2eff",
+		"fail",
+	}, {
+		"issue 11030 - empty HDistTree unexpectedly leads to error",
+		"05c0070600000080400fff37a0ca",
+		"",
+	}, {
+		"issue 11033 - empty HDistTree unexpectedly leads to error",
+		"050fb109c020cca5d017dcbca044881ee1034ec149c8980bbc413c2ab35be9dc" +
+			"b1473449922449922411202306ee97b0383a521b4ffdcf3217f9f7d3adb701",
+		"3130303634342068652e706870005d05355f7ed957ff084a90925d19e3ebc6d0" +
+			"c6d7",
+	}}
+
+	for i, tc := range testCases {
+		data, err := hex.DecodeString(tc.stream)
+		if err != nil {
+			t.Fatal(err)
+		}
+		data, err = io.ReadAll(NewReader(bytes.NewReader(data)))
+		if tc.want == "fail" {
+			if err == nil {
+				t.Errorf("#%d (%s): got nil error, want non-nil", i, tc.desc)
+			}
+		} else {
+			if err != nil {
+				t.Errorf("#%d (%s): %v", i, tc.desc, err)
+				continue
+			}
+			if got := hex.EncodeToString(data); got != tc.want {
+				t.Errorf("#%d (%s):\ngot  %q\nwant %q", i, tc.desc, got, tc.want)
+			}
+
+		}
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/fuzz_test.go b/vendor/github.com/klauspost/compress/flate/fuzz_test.go
new file mode 100644
index 0000000000..527bad25d1
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/fuzz_test.go
@@ -0,0 +1,128 @@
+//go:build go1.18
+// +build go1.18
+
+package flate
+
+import (
+	"bytes"
+	"flag"
+	"io"
+	"os"
+	"strconv"
+	"testing"
+
+	"github.com/klauspost/compress/internal/fuzz"
+)
+
+// Fuzzing tweaks:
+var fuzzStartF = flag.Int("start", HuffmanOnly, "Start fuzzing at this level")
+var fuzzEndF = flag.Int("end", BestCompression, "End fuzzing at this level (inclusive)")
+var fuzzMaxF = flag.Int("max", 1<<20, "Maximum input size")
+var fuzzSLF = flag.Bool("sl", true, "Include stateless encodes")
+
+func TestMain(m *testing.M) {
+	flag.Parse()
+	os.Exit(m.Run())
+}
+
+func FuzzEncoding(f *testing.F) {
+	fuzz.AddFromZip(f, "testdata/regression.zip", fuzz.TypeRaw, false)
+	fuzz.AddFromZip(f, "testdata/fuzz/encode-raw-corpus.zip", fuzz.TypeRaw, testing.Short())
+	fuzz.AddFromZip(f, "testdata/fuzz/FuzzEncoding.zip", fuzz.TypeGoFuzz, testing.Short())
+
+	startFuzz := *fuzzStartF
+	endFuzz := *fuzzEndF
+	maxSize := *fuzzMaxF
+	stateless := *fuzzSLF
+
+	decoder := NewReader(nil)
+	buf := new(bytes.Buffer)
+	encs := make([]*Writer, endFuzz-startFuzz+1)
+	for i := range encs {
+		var err error
+		encs[i], err = NewWriter(nil, i+startFuzz)
+		if err != nil {
+			f.Fatal(err.Error())
+		}
+	}
+
+	f.Fuzz(func(t *testing.T, data []byte) {
+		if len(data) > maxSize {
+			return
+		}
+		for level := startFuzz; level <= endFuzz; level++ {
+			msg := "level " + strconv.Itoa(level) + ":"
+			buf.Reset()
+			fw := encs[level-startFuzz]
+			fw.Reset(buf)
+			n, err := fw.Write(data)
+			if n != len(data) {
+				t.Fatal(msg + "short write")
+			}
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			err = fw.Close()
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			decoder.(Resetter).Reset(buf, nil)
+			data2, err := io.ReadAll(decoder)
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			if !bytes.Equal(data, data2) {
+				t.Fatal(msg + "not equal")
+			}
+			// Do it again...
+			msg = "level " + strconv.Itoa(level) + " (reset):"
+			buf.Reset()
+			fw.Reset(buf)
+			n, err = fw.Write(data)
+			if n != len(data) {
+				t.Fatal(msg + "short write")
+			}
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			err = fw.Close()
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			decoder.(Resetter).Reset(buf, nil)
+			data2, err = io.ReadAll(decoder)
+			if err != nil {
+				t.Fatal(msg + err.Error())
+			}
+			if !bytes.Equal(data, data2) {
+				t.Fatal(msg + "not equal")
+			}
+		}
+		if !stateless {
+			return
+		}
+		// Split into two and use history...
+		buf.Reset()
+		err := StatelessDeflate(buf, data[:len(data)/2], false, nil)
+		if err != nil {
+			t.Error(err)
+		}
+
+		// Use top half as dictionary...
+		dict := data[:len(data)/2]
+		err = StatelessDeflate(buf, data[len(data)/2:], true, dict)
+		if err != nil {
+			t.Error(err)
+		}
+
+		decoder.(Resetter).Reset(buf, nil)
+		data2, err := io.ReadAll(decoder)
+		if err != nil {
+			t.Error(err)
+		}
+		if !bytes.Equal(data, data2) {
+			//fmt.Printf("want:%x\ngot: %x\n", data1, data2)
+			t.Error("not equal")
+		}
+	})
+}
diff --git a/vendor/github.com/klauspost/compress/flate/gotest/ya.make b/vendor/github.com/klauspost/compress/flate/gotest/ya.make
new file mode 100644
index 0000000000..8b7d9ffe4d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/gotest/ya.make
@@ -0,0 +1,16 @@
+GO_TEST_FOR(vendor/github.com/klauspost/compress/flate)
+
+LICENSE(
+    Apache-2.0 AND
+    BSD-3-Clause AND
+    MIT
+)
+
+DATA(
+    arcadia/vendor/github.com/klauspost/compress/testdata
+    arcadia/vendor/github.com/klauspost/compress/flate/testdata
+)
+
+TEST_CWD(vendor/github.com/klauspost/compress/flate)
+
+END()
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go
new file mode 100644
index 0000000000..f70594c34e
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go
@@ -0,0 +1,1182 @@
+// Copyright 2009 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 flate
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	// The largest offset code.
+	offsetCodeCount = 30
+
+	// The special code used to mark the end of a block.
+	endBlockMarker = 256
+
+	// The first length code.
+	lengthCodesStart = 257
+
+	// The number of codegen codes.
+	codegenCodeCount = 19
+	badCode          = 255
+
+	// maxPredefinedTokens is the maximum number of tokens
+	// where we check if fixed size is smaller.
+	maxPredefinedTokens = 250
+
+	// bufferFlushSize indicates the buffer size
+	// after which bytes are flushed to the writer.
+	// Should preferably be a multiple of 6, since
+	// we accumulate 6 bytes between writes to the buffer.
+	bufferFlushSize = 246
+)
+
+// Minimum length code that emits bits.
+const lengthExtraBitsMinCode = 8
+
+// The number of extra bits needed by length code X - LENGTH_CODES_START.
+var lengthExtraBits = [32]uint8{
+	/* 257 */ 0, 0, 0,
+	/* 260 */ 0, 0, 0, 0, 0, 1, 1, 1, 1, 2,
+	/* 270 */ 2, 2, 2, 3, 3, 3, 3, 4, 4, 4,
+	/* 280 */ 4, 5, 5, 5, 5, 0,
+}
+
+// The length indicated by length code X - LENGTH_CODES_START.
+var lengthBase = [32]uint8{
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 10,
+	12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
+	64, 80, 96, 112, 128, 160, 192, 224, 255,
+}
+
+// Minimum offset code that emits bits.
+const offsetExtraBitsMinCode = 4
+
+// offset code word extra bits.
+var offsetExtraBits = [32]int8{
+	0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
+	4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
+	9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
+	/* extended window */
+	14, 14,
+}
+
+var offsetCombined = [32]uint32{}
+
+func init() {
+	var offsetBase = [32]uint32{
+		/* normal deflate */
+		0x000000, 0x000001, 0x000002, 0x000003, 0x000004,
+		0x000006, 0x000008, 0x00000c, 0x000010, 0x000018,
+		0x000020, 0x000030, 0x000040, 0x000060, 0x000080,
+		0x0000c0, 0x000100, 0x000180, 0x000200, 0x000300,
+		0x000400, 0x000600, 0x000800, 0x000c00, 0x001000,
+		0x001800, 0x002000, 0x003000, 0x004000, 0x006000,
+
+		/* extended window */
+		0x008000, 0x00c000,
+	}
+
+	for i := range offsetCombined[:] {
+		// Don't use extended window values...
+		if offsetExtraBits[i] == 0 || offsetBase[i] > 0x006000 {
+			continue
+		}
+		offsetCombined[i] = uint32(offsetExtraBits[i]) | (offsetBase[i] << 8)
+	}
+}
+
+// The odd order in which the codegen code sizes are written.
+var codegenOrder = []uint32{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}
+
+type huffmanBitWriter struct {
+	// writer is the underlying writer.
+	// Do not use it directly; use the write method, which ensures
+	// that Write errors are sticky.
+	writer io.Writer
+
+	// Data waiting to be written is bytes[0:nbytes]
+	// and then the low nbits of bits.
+	bits            uint64
+	nbits           uint8
+	nbytes          uint8
+	lastHuffMan     bool
+	literalEncoding *huffmanEncoder
+	tmpLitEncoding  *huffmanEncoder
+	offsetEncoding  *huffmanEncoder
+	codegenEncoding *huffmanEncoder
+	err             error
+	lastHeader      int
+	// Set between 0 (reused block can be up to 2x the size)
+	logNewTablePenalty uint
+	bytes              [256 + 8]byte
+	literalFreq        [lengthCodesStart + 32]uint16
+	offsetFreq         [32]uint16
+	codegenFreq        [codegenCodeCount]uint16
+
+	// codegen must have an extra space for the final symbol.
+	codegen [literalCount + offsetCodeCount + 1]uint8
+}
+
+// Huffman reuse.
+//
+// The huffmanBitWriter supports reusing huffman tables and thereby combining block sections.
+//
+// This is controlled by several variables:
+//
+// If lastHeader is non-zero the Huffman table can be reused.
+// This also indicates that a Huffman table has been generated that can output all
+// possible symbols.
+// It also indicates that an EOB has not yet been emitted, so if a new tabel is generated
+// an EOB with the previous table must be written.
+//
+// If lastHuffMan is set, a table for outputting literals has been generated and offsets are invalid.
+//
+// An incoming block estimates the output size of a new table using a 'fresh' by calculating the
+// optimal size and adding a penalty in 'logNewTablePenalty'.
+// A Huffman table is not optimal, which is why we add a penalty, and generating a new table
+// is slower both for compression and decompression.
+
+func newHuffmanBitWriter(w io.Writer) *huffmanBitWriter {
+	return &huffmanBitWriter{
+		writer:          w,
+		literalEncoding: newHuffmanEncoder(literalCount),
+		tmpLitEncoding:  newHuffmanEncoder(literalCount),
+		codegenEncoding: newHuffmanEncoder(codegenCodeCount),
+		offsetEncoding:  newHuffmanEncoder(offsetCodeCount),
+	}
+}
+
+func (w *huffmanBitWriter) reset(writer io.Writer) {
+	w.writer = writer
+	w.bits, w.nbits, w.nbytes, w.err = 0, 0, 0, nil
+	w.lastHeader = 0
+	w.lastHuffMan = false
+}
+
+func (w *huffmanBitWriter) canReuse(t *tokens) (ok bool) {
+	a := t.offHist[:offsetCodeCount]
+	b := w.offsetEncoding.codes
+	b = b[:len(a)]
+	for i, v := range a {
+		if v != 0 && b[i].zero() {
+			return false
+		}
+	}
+
+	a = t.extraHist[:literalCount-256]
+	b = w.literalEncoding.codes[256:literalCount]
+	b = b[:len(a)]
+	for i, v := range a {
+		if v != 0 && b[i].zero() {
+			return false
+		}
+	}
+
+	a = t.litHist[:256]
+	b = w.literalEncoding.codes[:len(a)]
+	for i, v := range a {
+		if v != 0 && b[i].zero() {
+			return false
+		}
+	}
+	return true
+}
+
+func (w *huffmanBitWriter) flush() {
+	if w.err != nil {
+		w.nbits = 0
+		return
+	}
+	if w.lastHeader > 0 {
+		// We owe an EOB
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+	}
+	n := w.nbytes
+	for w.nbits != 0 {
+		w.bytes[n] = byte(w.bits)
+		w.bits >>= 8
+		if w.nbits > 8 { // Avoid underflow
+			w.nbits -= 8
+		} else {
+			w.nbits = 0
+		}
+		n++
+	}
+	w.bits = 0
+	w.write(w.bytes[:n])
+	w.nbytes = 0
+}
+
+func (w *huffmanBitWriter) write(b []byte) {
+	if w.err != nil {
+		return
+	}
+	_, w.err = w.writer.Write(b)
+}
+
+func (w *huffmanBitWriter) writeBits(b int32, nb uint8) {
+	w.bits |= uint64(b) << (w.nbits & 63)
+	w.nbits += nb
+	if w.nbits >= 48 {
+		w.writeOutBits()
+	}
+}
+
+func (w *huffmanBitWriter) writeBytes(bytes []byte) {
+	if w.err != nil {
+		return
+	}
+	n := w.nbytes
+	if w.nbits&7 != 0 {
+		w.err = InternalError("writeBytes with unfinished bits")
+		return
+	}
+	for w.nbits != 0 {
+		w.bytes[n] = byte(w.bits)
+		w.bits >>= 8
+		w.nbits -= 8
+		n++
+	}
+	if n != 0 {
+		w.write(w.bytes[:n])
+	}
+	w.nbytes = 0
+	w.write(bytes)
+}
+
+// RFC 1951 3.2.7 specifies a special run-length encoding for specifying
+// the literal and offset lengths arrays (which are concatenated into a single
+// array).  This method generates that run-length encoding.
+//
+// The result is written into the codegen array, and the frequencies
+// of each code is written into the codegenFreq array.
+// Codes 0-15 are single byte codes. Codes 16-18 are followed by additional
+// information. Code badCode is an end marker
+//
+//	numLiterals      The number of literals in literalEncoding
+//	numOffsets       The number of offsets in offsetEncoding
+//	litenc, offenc   The literal and offset encoder to use
+func (w *huffmanBitWriter) generateCodegen(numLiterals int, numOffsets int, litEnc, offEnc *huffmanEncoder) {
+	for i := range w.codegenFreq {
+		w.codegenFreq[i] = 0
+	}
+	// Note that we are using codegen both as a temporary variable for holding
+	// a copy of the frequencies, and as the place where we put the result.
+	// This is fine because the output is always shorter than the input used
+	// so far.
+	codegen := w.codegen[:] // cache
+	// Copy the concatenated code sizes to codegen. Put a marker at the end.
+	cgnl := codegen[:numLiterals]
+	for i := range cgnl {
+		cgnl[i] = litEnc.codes[i].len()
+	}
+
+	cgnl = codegen[numLiterals : numLiterals+numOffsets]
+	for i := range cgnl {
+		cgnl[i] = offEnc.codes[i].len()
+	}
+	codegen[numLiterals+numOffsets] = badCode
+
+	size := codegen[0]
+	count := 1
+	outIndex := 0
+	for inIndex := 1; size != badCode; inIndex++ {
+		// INVARIANT: We have seen "count" copies of size that have not yet
+		// had output generated for them.
+		nextSize := codegen[inIndex]
+		if nextSize == size {
+			count++
+			continue
+		}
+		// We need to generate codegen indicating "count" of size.
+		if size != 0 {
+			codegen[outIndex] = size
+			outIndex++
+			w.codegenFreq[size]++
+			count--
+			for count >= 3 {
+				n := 6
+				if n > count {
+					n = count
+				}
+				codegen[outIndex] = 16
+				outIndex++
+				codegen[outIndex] = uint8(n - 3)
+				outIndex++
+				w.codegenFreq[16]++
+				count -= n
+			}
+		} else {
+			for count >= 11 {
+				n := 138
+				if n > count {
+					n = count
+				}
+				codegen[outIndex] = 18
+				outIndex++
+				codegen[outIndex] = uint8(n - 11)
+				outIndex++
+				w.codegenFreq[18]++
+				count -= n
+			}
+			if count >= 3 {
+				// count >= 3 && count <= 10
+				codegen[outIndex] = 17
+				outIndex++
+				codegen[outIndex] = uint8(count - 3)
+				outIndex++
+				w.codegenFreq[17]++
+				count = 0
+			}
+		}
+		count--
+		for ; count >= 0; count-- {
+			codegen[outIndex] = size
+			outIndex++
+			w.codegenFreq[size]++
+		}
+		// Set up invariant for next time through the loop.
+		size = nextSize
+		count = 1
+	}
+	// Marker indicating the end of the codegen.
+	codegen[outIndex] = badCode
+}
+
+func (w *huffmanBitWriter) codegens() int {
+	numCodegens := len(w.codegenFreq)
+	for numCodegens > 4 && w.codegenFreq[codegenOrder[numCodegens-1]] == 0 {
+		numCodegens--
+	}
+	return numCodegens
+}
+
+func (w *huffmanBitWriter) headerSize() (size, numCodegens int) {
+	numCodegens = len(w.codegenFreq)
+	for numCodegens > 4 && w.codegenFreq[codegenOrder[numCodegens-1]] == 0 {
+		numCodegens--
+	}
+	return 3 + 5 + 5 + 4 + (3 * numCodegens) +
+		w.codegenEncoding.bitLength(w.codegenFreq[:]) +
+		int(w.codegenFreq[16])*2 +
+		int(w.codegenFreq[17])*3 +
+		int(w.codegenFreq[18])*7, numCodegens
+}
+
+// dynamicSize returns the size of dynamically encoded data in bits.
+func (w *huffmanBitWriter) dynamicReuseSize(litEnc, offEnc *huffmanEncoder) (size int) {
+	size = litEnc.bitLength(w.literalFreq[:]) +
+		offEnc.bitLength(w.offsetFreq[:])
+	return size
+}
+
+// dynamicSize returns the size of dynamically encoded data in bits.
+func (w *huffmanBitWriter) dynamicSize(litEnc, offEnc *huffmanEncoder, extraBits int) (size, numCodegens int) {
+	header, numCodegens := w.headerSize()
+	size = header +
+		litEnc.bitLength(w.literalFreq[:]) +
+		offEnc.bitLength(w.offsetFreq[:]) +
+		extraBits
+	return size, numCodegens
+}
+
+// extraBitSize will return the number of bits that will be written
+// as "extra" bits on matches.
+func (w *huffmanBitWriter) extraBitSize() int {
+	total := 0
+	for i, n := range w.literalFreq[257:literalCount] {
+		total += int(n) * int(lengthExtraBits[i&31])
+	}
+	for i, n := range w.offsetFreq[:offsetCodeCount] {
+		total += int(n) * int(offsetExtraBits[i&31])
+	}
+	return total
+}
+
+// fixedSize returns the size of dynamically encoded data in bits.
+func (w *huffmanBitWriter) fixedSize(extraBits int) int {
+	return 3 +
+		fixedLiteralEncoding.bitLength(w.literalFreq[:]) +
+		fixedOffsetEncoding.bitLength(w.offsetFreq[:]) +
+		extraBits
+}
+
+// storedSize calculates the stored size, including header.
+// The function returns the size in bits and whether the block
+// fits inside a single block.
+func (w *huffmanBitWriter) storedSize(in []byte) (int, bool) {
+	if in == nil {
+		return 0, false
+	}
+	if len(in) <= maxStoreBlockSize {
+		return (len(in) + 5) * 8, true
+	}
+	return 0, false
+}
+
+func (w *huffmanBitWriter) writeCode(c hcode) {
+	// The function does not get inlined if we "& 63" the shift.
+	w.bits |= c.code64() << (w.nbits & 63)
+	w.nbits += c.len()
+	if w.nbits >= 48 {
+		w.writeOutBits()
+	}
+}
+
+// writeOutBits will write bits to the buffer.
+func (w *huffmanBitWriter) writeOutBits() {
+	bits := w.bits
+	w.bits >>= 48
+	w.nbits -= 48
+	n := w.nbytes
+
+	// We over-write, but faster...
+	binary.LittleEndian.PutUint64(w.bytes[n:], bits)
+	n += 6
+
+	if n >= bufferFlushSize {
+		if w.err != nil {
+			n = 0
+			return
+		}
+		w.write(w.bytes[:n])
+		n = 0
+	}
+
+	w.nbytes = n
+}
+
+// Write the header of a dynamic Huffman block to the output stream.
+//
+//	numLiterals  The number of literals specified in codegen
+//	numOffsets   The number of offsets specified in codegen
+//	numCodegens  The number of codegens used in codegen
+func (w *huffmanBitWriter) writeDynamicHeader(numLiterals int, numOffsets int, numCodegens int, isEof bool) {
+	if w.err != nil {
+		return
+	}
+	var firstBits int32 = 4
+	if isEof {
+		firstBits = 5
+	}
+	w.writeBits(firstBits, 3)
+	w.writeBits(int32(numLiterals-257), 5)
+	w.writeBits(int32(numOffsets-1), 5)
+	w.writeBits(int32(numCodegens-4), 4)
+
+	for i := 0; i < numCodegens; i++ {
+		value := uint(w.codegenEncoding.codes[codegenOrder[i]].len())
+		w.writeBits(int32(value), 3)
+	}
+
+	i := 0
+	for {
+		var codeWord = uint32(w.codegen[i])
+		i++
+		if codeWord == badCode {
+			break
+		}
+		w.writeCode(w.codegenEncoding.codes[codeWord])
+
+		switch codeWord {
+		case 16:
+			w.writeBits(int32(w.codegen[i]), 2)
+			i++
+		case 17:
+			w.writeBits(int32(w.codegen[i]), 3)
+			i++
+		case 18:
+			w.writeBits(int32(w.codegen[i]), 7)
+			i++
+		}
+	}
+}
+
+// writeStoredHeader will write a stored header.
+// If the stored block is only used for EOF,
+// it is replaced with a fixed huffman block.
+func (w *huffmanBitWriter) writeStoredHeader(length int, isEof bool) {
+	if w.err != nil {
+		return
+	}
+	if w.lastHeader > 0 {
+		// We owe an EOB
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+	}
+
+	// To write EOF, use a fixed encoding block. 10 bits instead of 5 bytes.
+	if length == 0 && isEof {
+		w.writeFixedHeader(isEof)
+		// EOB: 7 bits, value: 0
+		w.writeBits(0, 7)
+		w.flush()
+		return
+	}
+
+	var flag int32
+	if isEof {
+		flag = 1
+	}
+	w.writeBits(flag, 3)
+	w.flush()
+	w.writeBits(int32(length), 16)
+	w.writeBits(int32(^uint16(length)), 16)
+}
+
+func (w *huffmanBitWriter) writeFixedHeader(isEof bool) {
+	if w.err != nil {
+		return
+	}
+	if w.lastHeader > 0 {
+		// We owe an EOB
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+	}
+
+	// Indicate that we are a fixed Huffman block
+	var value int32 = 2
+	if isEof {
+		value = 3
+	}
+	w.writeBits(value, 3)
+}
+
+// writeBlock will write a block of tokens with the smallest encoding.
+// The original input can be supplied, and if the huffman encoded data
+// is larger than the original bytes, the data will be written as a
+// stored block.
+// If the input is nil, the tokens will always be Huffman encoded.
+func (w *huffmanBitWriter) writeBlock(tokens *tokens, eof bool, input []byte) {
+	if w.err != nil {
+		return
+	}
+
+	tokens.AddEOB()
+	if w.lastHeader > 0 {
+		// We owe an EOB
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+	}
+	numLiterals, numOffsets := w.indexTokens(tokens, false)
+	w.generate()
+	var extraBits int
+	storedSize, storable := w.storedSize(input)
+	if storable {
+		extraBits = w.extraBitSize()
+	}
+
+	// Figure out smallest code.
+	// Fixed Huffman baseline.
+	var literalEncoding = fixedLiteralEncoding
+	var offsetEncoding = fixedOffsetEncoding
+	var size = math.MaxInt32
+	if tokens.n < maxPredefinedTokens {
+		size = w.fixedSize(extraBits)
+	}
+
+	// Dynamic Huffman?
+	var numCodegens int
+
+	// Generate codegen and codegenFrequencies, which indicates how to encode
+	// the literalEncoding and the offsetEncoding.
+	w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, w.offsetEncoding)
+	w.codegenEncoding.generate(w.codegenFreq[:], 7)
+	dynamicSize, numCodegens := w.dynamicSize(w.literalEncoding, w.offsetEncoding, extraBits)
+
+	if dynamicSize < size {
+		size = dynamicSize
+		literalEncoding = w.literalEncoding
+		offsetEncoding = w.offsetEncoding
+	}
+
+	// Stored bytes?
+	if storable && storedSize <= size {
+		w.writeStoredHeader(len(input), eof)
+		w.writeBytes(input)
+		return
+	}
+
+	// Huffman.
+	if literalEncoding == fixedLiteralEncoding {
+		w.writeFixedHeader(eof)
+	} else {
+		w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
+	}
+
+	// Write the tokens.
+	w.writeTokens(tokens.Slice(), literalEncoding.codes, offsetEncoding.codes)
+}
+
+// writeBlockDynamic encodes a block using a dynamic Huffman table.
+// This should be used if the symbols used have a disproportionate
+// histogram distribution.
+// If input is supplied and the compression savings are below 1/16th of the
+// input size the block is stored.
+func (w *huffmanBitWriter) writeBlockDynamic(tokens *tokens, eof bool, input []byte, sync bool) {
+	if w.err != nil {
+		return
+	}
+
+	sync = sync || eof
+	if sync {
+		tokens.AddEOB()
+	}
+
+	// We cannot reuse pure huffman table, and must mark as EOF.
+	if (w.lastHuffMan || eof) && w.lastHeader > 0 {
+		// We will not try to reuse.
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+		w.lastHuffMan = false
+	}
+
+	// fillReuse enables filling of empty values.
+	// This will make encodings always reusable without testing.
+	// However, this does not appear to benefit on most cases.
+	const fillReuse = false
+
+	// Check if we can reuse...
+	if !fillReuse && w.lastHeader > 0 && !w.canReuse(tokens) {
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+	}
+
+	numLiterals, numOffsets := w.indexTokens(tokens, !sync)
+	extraBits := 0
+	ssize, storable := w.storedSize(input)
+
+	const usePrefs = true
+	if storable || w.lastHeader > 0 {
+		extraBits = w.extraBitSize()
+	}
+
+	var size int
+
+	// Check if we should reuse.
+	if w.lastHeader > 0 {
+		// Estimate size for using a new table.
+		// Use the previous header size as the best estimate.
+		newSize := w.lastHeader + tokens.EstimatedBits()
+		newSize += int(w.literalEncoding.codes[endBlockMarker].len()) + newSize>>w.logNewTablePenalty
+
+		// The estimated size is calculated as an optimal table.
+		// We add a penalty to make it more realistic and re-use a bit more.
+		reuseSize := w.dynamicReuseSize(w.literalEncoding, w.offsetEncoding) + extraBits
+
+		// Check if a new table is better.
+		if newSize < reuseSize {
+			// Write the EOB we owe.
+			w.writeCode(w.literalEncoding.codes[endBlockMarker])
+			size = newSize
+			w.lastHeader = 0
+		} else {
+			size = reuseSize
+		}
+
+		if tokens.n < maxPredefinedTokens {
+			if preSize := w.fixedSize(extraBits) + 7; usePrefs && preSize < size {
+				// Check if we get a reasonable size decrease.
+				if storable && ssize <= size {
+					w.writeStoredHeader(len(input), eof)
+					w.writeBytes(input)
+					return
+				}
+				w.writeFixedHeader(eof)
+				if !sync {
+					tokens.AddEOB()
+				}
+				w.writeTokens(tokens.Slice(), fixedLiteralEncoding.codes, fixedOffsetEncoding.codes)
+				return
+			}
+		}
+		// Check if we get a reasonable size decrease.
+		if storable && ssize <= size {
+			w.writeStoredHeader(len(input), eof)
+			w.writeBytes(input)
+			return
+		}
+	}
+
+	// We want a new block/table
+	if w.lastHeader == 0 {
+		if fillReuse && !sync {
+			w.fillTokens()
+			numLiterals, numOffsets = maxNumLit, maxNumDist
+		} else {
+			w.literalFreq[endBlockMarker] = 1
+		}
+
+		w.generate()
+		// Generate codegen and codegenFrequencies, which indicates how to encode
+		// the literalEncoding and the offsetEncoding.
+		w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, w.offsetEncoding)
+		w.codegenEncoding.generate(w.codegenFreq[:], 7)
+
+		var numCodegens int
+		if fillReuse && !sync {
+			// Reindex for accurate size...
+			w.indexTokens(tokens, true)
+		}
+		size, numCodegens = w.dynamicSize(w.literalEncoding, w.offsetEncoding, extraBits)
+
+		// Store predefined, if we don't get a reasonable improvement.
+		if tokens.n < maxPredefinedTokens {
+			if preSize := w.fixedSize(extraBits); usePrefs && preSize <= size {
+				// Store bytes, if we don't get an improvement.
+				if storable && ssize <= preSize {
+					w.writeStoredHeader(len(input), eof)
+					w.writeBytes(input)
+					return
+				}
+				w.writeFixedHeader(eof)
+				if !sync {
+					tokens.AddEOB()
+				}
+				w.writeTokens(tokens.Slice(), fixedLiteralEncoding.codes, fixedOffsetEncoding.codes)
+				return
+			}
+		}
+
+		if storable && ssize <= size {
+			// Store bytes, if we don't get an improvement.
+			w.writeStoredHeader(len(input), eof)
+			w.writeBytes(input)
+			return
+		}
+
+		// Write Huffman table.
+		w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
+		if !sync {
+			w.lastHeader, _ = w.headerSize()
+		}
+		w.lastHuffMan = false
+	}
+
+	if sync {
+		w.lastHeader = 0
+	}
+	// Write the tokens.
+	w.writeTokens(tokens.Slice(), w.literalEncoding.codes, w.offsetEncoding.codes)
+}
+
+func (w *huffmanBitWriter) fillTokens() {
+	for i, v := range w.literalFreq[:literalCount] {
+		if v == 0 {
+			w.literalFreq[i] = 1
+		}
+	}
+	for i, v := range w.offsetFreq[:offsetCodeCount] {
+		if v == 0 {
+			w.offsetFreq[i] = 1
+		}
+	}
+}
+
+// indexTokens indexes a slice of tokens, and updates
+// literalFreq and offsetFreq, and generates literalEncoding
+// and offsetEncoding.
+// The number of literal and offset tokens is returned.
+func (w *huffmanBitWriter) indexTokens(t *tokens, filled bool) (numLiterals, numOffsets int) {
+	//copy(w.literalFreq[:], t.litHist[:])
+	*(*[256]uint16)(w.literalFreq[:]) = t.litHist
+	//copy(w.literalFreq[256:], t.extraHist[:])
+	*(*[32]uint16)(w.literalFreq[256:]) = t.extraHist
+	w.offsetFreq = t.offHist
+
+	if t.n == 0 {
+		return
+	}
+	if filled {
+		return maxNumLit, maxNumDist
+	}
+	// get the number of literals
+	numLiterals = len(w.literalFreq)
+	for w.literalFreq[numLiterals-1] == 0 {
+		numLiterals--
+	}
+	// get the number of offsets
+	numOffsets = len(w.offsetFreq)
+	for numOffsets > 0 && w.offsetFreq[numOffsets-1] == 0 {
+		numOffsets--
+	}
+	if numOffsets == 0 {
+		// We haven't found a single match. If we want to go with the dynamic encoding,
+		// we should count at least one offset to be sure that the offset huffman tree could be encoded.
+		w.offsetFreq[0] = 1
+		numOffsets = 1
+	}
+	return
+}
+
+func (w *huffmanBitWriter) generate() {
+	w.literalEncoding.generate(w.literalFreq[:literalCount], 15)
+	w.offsetEncoding.generate(w.offsetFreq[:offsetCodeCount], 15)
+}
+
+// writeTokens writes a slice of tokens to the output.
+// codes for literal and offset encoding must be supplied.
+func (w *huffmanBitWriter) writeTokens(tokens []token, leCodes, oeCodes []hcode) {
+	if w.err != nil {
+		return
+	}
+	if len(tokens) == 0 {
+		return
+	}
+
+	// Only last token should be endBlockMarker.
+	var deferEOB bool
+	if tokens[len(tokens)-1] == endBlockMarker {
+		tokens = tokens[:len(tokens)-1]
+		deferEOB = true
+	}
+
+	// Create slices up to the next power of two to avoid bounds checks.
+	lits := leCodes[:256]
+	offs := oeCodes[:32]
+	lengths := leCodes[lengthCodesStart:]
+	lengths = lengths[:32]
+
+	// Go 1.16 LOVES having these on stack.
+	bits, nbits, nbytes := w.bits, w.nbits, w.nbytes
+
+	for _, t := range tokens {
+		if t < 256 {
+			//w.writeCode(lits[t.literal()])
+			c := lits[t]
+			bits |= c.code64() << (nbits & 63)
+			nbits += c.len()
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
+			continue
+		}
+
+		// Write the length
+		length := t.length()
+		lengthCode := lengthCode(length) & 31
+		if false {
+			w.writeCode(lengths[lengthCode])
+		} else {
+			// inlined
+			c := lengths[lengthCode]
+			bits |= c.code64() << (nbits & 63)
+			nbits += c.len()
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
+		}
+
+		if lengthCode >= lengthExtraBitsMinCode {
+			extraLengthBits := lengthExtraBits[lengthCode]
+			//w.writeBits(extraLength, extraLengthBits)
+			extraLength := int32(length - lengthBase[lengthCode])
+			bits |= uint64(extraLength) << (nbits & 63)
+			nbits += extraLengthBits
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
+		}
+		// Write the offset
+		offset := t.offset()
+		offsetCode := (offset >> 16) & 31
+		if false {
+			w.writeCode(offs[offsetCode])
+		} else {
+			// inlined
+			c := offs[offsetCode]
+			bits |= c.code64() << (nbits & 63)
+			nbits += c.len()
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
+		}
+
+		if offsetCode >= offsetExtraBitsMinCode {
+			offsetComb := offsetCombined[offsetCode]
+			//w.writeBits(extraOffset, extraOffsetBits)
+			bits |= uint64((offset-(offsetComb>>8))&matchOffsetOnlyMask) << (nbits & 63)
+			nbits += uint8(offsetComb)
+			if nbits >= 48 {
+				binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+				//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+				bits >>= 48
+				nbits -= 48
+				nbytes += 6
+				if nbytes >= bufferFlushSize {
+					if w.err != nil {
+						nbytes = 0
+						return
+					}
+					_, w.err = w.writer.Write(w.bytes[:nbytes])
+					nbytes = 0
+				}
+			}
+		}
+	}
+	// Restore...
+	w.bits, w.nbits, w.nbytes = bits, nbits, nbytes
+
+	if deferEOB {
+		w.writeCode(leCodes[endBlockMarker])
+	}
+}
+
+// huffOffset is a static offset encoder used for huffman only encoding.
+// It can be reused since we will not be encoding offset values.
+var huffOffset *huffmanEncoder
+
+func init() {
+	w := newHuffmanBitWriter(nil)
+	w.offsetFreq[0] = 1
+	huffOffset = newHuffmanEncoder(offsetCodeCount)
+	huffOffset.generate(w.offsetFreq[:offsetCodeCount], 15)
+}
+
+// writeBlockHuff encodes a block of bytes as either
+// Huffman encoded literals or uncompressed bytes if the
+// results only gains very little from compression.
+func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte, sync bool) {
+	if w.err != nil {
+		return
+	}
+
+	// Clear histogram
+	for i := range w.literalFreq[:] {
+		w.literalFreq[i] = 0
+	}
+	if !w.lastHuffMan {
+		for i := range w.offsetFreq[:] {
+			w.offsetFreq[i] = 0
+		}
+	}
+
+	const numLiterals = endBlockMarker + 1
+	const numOffsets = 1
+
+	// Add everything as literals
+	// We have to estimate the header size.
+	// Assume header is around 70 bytes:
+	// https://stackoverflow.com/a/25454430
+	const guessHeaderSizeBits = 70 * 8
+	histogram(input, w.literalFreq[:numLiterals])
+	ssize, storable := w.storedSize(input)
+	if storable && len(input) > 1024 {
+		// Quick check for incompressible content.
+		abs := float64(0)
+		avg := float64(len(input)) / 256
+		max := float64(len(input) * 2)
+		for _, v := range w.literalFreq[:256] {
+			diff := float64(v) - avg
+			abs += diff * diff
+			if abs > max {
+				break
+			}
+		}
+		if abs < max {
+			if debugDeflate {
+				fmt.Println("stored", abs, "<", max)
+			}
+			// No chance we can compress this...
+			w.writeStoredHeader(len(input), eof)
+			w.writeBytes(input)
+			return
+		}
+	}
+	w.literalFreq[endBlockMarker] = 1
+	w.tmpLitEncoding.generate(w.literalFreq[:numLiterals], 15)
+	estBits := w.tmpLitEncoding.canReuseBits(w.literalFreq[:numLiterals])
+	if estBits < math.MaxInt32 {
+		estBits += w.lastHeader
+		if w.lastHeader == 0 {
+			estBits += guessHeaderSizeBits
+		}
+		estBits += estBits >> w.logNewTablePenalty
+	}
+
+	// Store bytes, if we don't get a reasonable improvement.
+	if storable && ssize <= estBits {
+		if debugDeflate {
+			fmt.Println("stored,", ssize, "<=", estBits)
+		}
+		w.writeStoredHeader(len(input), eof)
+		w.writeBytes(input)
+		return
+	}
+
+	if w.lastHeader > 0 {
+		reuseSize := w.literalEncoding.canReuseBits(w.literalFreq[:256])
+
+		if estBits < reuseSize {
+			if debugDeflate {
+				fmt.Println("NOT reusing, reuse:", reuseSize/8, "> new:", estBits/8, "header est:", w.lastHeader/8, "bytes")
+			}
+			// We owe an EOB
+			w.writeCode(w.literalEncoding.codes[endBlockMarker])
+			w.lastHeader = 0
+		} else if debugDeflate {
+			fmt.Println("reusing, reuse:", reuseSize/8, "> new:", estBits/8, "- header est:", w.lastHeader/8)
+		}
+	}
+
+	count := 0
+	if w.lastHeader == 0 {
+		// Use the temp encoding, so swap.
+		w.literalEncoding, w.tmpLitEncoding = w.tmpLitEncoding, w.literalEncoding
+		// Generate codegen and codegenFrequencies, which indicates how to encode
+		// the literalEncoding and the offsetEncoding.
+		w.generateCodegen(numLiterals, numOffsets, w.literalEncoding, huffOffset)
+		w.codegenEncoding.generate(w.codegenFreq[:], 7)
+		numCodegens := w.codegens()
+
+		// Huffman.
+		w.writeDynamicHeader(numLiterals, numOffsets, numCodegens, eof)
+		w.lastHuffMan = true
+		w.lastHeader, _ = w.headerSize()
+		if debugDeflate {
+			count += w.lastHeader
+			fmt.Println("header:", count/8)
+		}
+	}
+
+	encoding := w.literalEncoding.codes[:256]
+	// Go 1.16 LOVES having these on stack. At least 1.5x the speed.
+	bits, nbits, nbytes := w.bits, w.nbits, w.nbytes
+
+	if debugDeflate {
+		count -= int(nbytes)*8 + int(nbits)
+	}
+	// Unroll, write 3 codes/loop.
+	// Fastest number of unrolls.
+	for len(input) > 3 {
+		// We must have at least 48 bits free.
+		if nbits >= 8 {
+			n := nbits >> 3
+			binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+			bits >>= (n * 8) & 63
+			nbits -= n * 8
+			nbytes += n
+		}
+		if nbytes >= bufferFlushSize {
+			if w.err != nil {
+				nbytes = 0
+				return
+			}
+			if debugDeflate {
+				count += int(nbytes) * 8
+			}
+			_, w.err = w.writer.Write(w.bytes[:nbytes])
+			nbytes = 0
+		}
+		a, b := encoding[input[0]], encoding[input[1]]
+		bits |= a.code64() << (nbits & 63)
+		bits |= b.code64() << ((nbits + a.len()) & 63)
+		c := encoding[input[2]]
+		nbits += b.len() + a.len()
+		bits |= c.code64() << (nbits & 63)
+		nbits += c.len()
+		input = input[3:]
+	}
+
+	// Remaining...
+	for _, t := range input {
+		if nbits >= 48 {
+			binary.LittleEndian.PutUint64(w.bytes[nbytes:], bits)
+			//*(*uint64)(unsafe.Pointer(&w.bytes[nbytes])) = bits
+			bits >>= 48
+			nbits -= 48
+			nbytes += 6
+			if nbytes >= bufferFlushSize {
+				if w.err != nil {
+					nbytes = 0
+					return
+				}
+				if debugDeflate {
+					count += int(nbytes) * 8
+				}
+				_, w.err = w.writer.Write(w.bytes[:nbytes])
+				nbytes = 0
+			}
+		}
+		// Bitwriting inlined, ~30% speedup
+		c := encoding[t]
+		bits |= c.code64() << (nbits & 63)
+
+		nbits += c.len()
+		if debugDeflate {
+			count += int(c.len())
+		}
+	}
+	// Restore...
+	w.bits, w.nbits, w.nbytes = bits, nbits, nbytes
+
+	if debugDeflate {
+		nb := count + int(nbytes)*8 + int(nbits)
+		fmt.Println("wrote", nb, "bits,", nb/8, "bytes.")
+	}
+	// Flush if needed to have space.
+	if w.nbits >= 48 {
+		w.writeOutBits()
+	}
+
+	if eof || sync {
+		w.writeCode(w.literalEncoding.codes[endBlockMarker])
+		w.lastHeader = 0
+		w.lastHuffMan = false
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_bit_writer_test.go b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer_test.go
new file mode 100644
index 0000000000..dfb93e326c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer_test.go
@@ -0,0 +1,381 @@
+// 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 flate
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+var update = flag.Bool("update", false, "update reference files")
+
+// TestBlockHuff tests huffman encoding against reference files
+// to detect possible regressions.
+// If encoding/bit allocation changes you can regenerate these files
+// by using the -update flag.
+func TestBlockHuff(t *testing.T) {
+	// determine input files
+	match, err := filepath.Glob("testdata/huffman-*.in")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, in := range match {
+		out := in // for files where input and output are identical
+		if strings.HasSuffix(in, ".in") {
+			out = in[:len(in)-len(".in")] + ".golden"
+		}
+		t.Run(in, func(t *testing.T) {
+			testBlockHuff(t, in, out)
+		})
+	}
+}
+
+func testBlockHuff(t *testing.T, in, out string) {
+	all, err := os.ReadFile(in)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	var buf bytes.Buffer
+	bw := newHuffmanBitWriter(&buf)
+	bw.logNewTablePenalty = 8
+	bw.writeBlockHuff(false, all, false)
+	bw.flush()
+	got := buf.Bytes()
+
+	want, err := os.ReadFile(out)
+	if err != nil && !*update {
+		t.Error(err)
+		return
+	}
+
+	t.Logf("Testing %q", in)
+	if !bytes.Equal(got, want) {
+		if *update {
+			if in != out {
+				t.Logf("Updating %q", out)
+				if err := os.WriteFile(out, got, 0666); err != nil {
+					t.Error(err)
+				}
+				return
+			}
+			// in == out: don't accidentally destroy input
+			t.Errorf("WARNING: -update did not rewrite input file %s", in)
+		}
+
+		t.Errorf("%q != %q (see %q)", in, out, in+".got")
+		if err := os.WriteFile(in+".got", got, 0666); err != nil {
+			t.Error(err)
+		}
+		return
+	}
+	t.Log("Output ok")
+
+	// Test if the writer produces the same output after reset.
+	buf.Reset()
+	bw.reset(&buf)
+	bw.writeBlockHuff(false, all, false)
+	bw.flush()
+	got = buf.Bytes()
+	if !bytes.Equal(got, want) {
+		t.Errorf("after reset %q != %q (see %q)", in, out, in+".reset.got")
+		if err := os.WriteFile(in+".reset.got", got, 0666); err != nil {
+			t.Error(err)
+		}
+		return
+	}
+	t.Log("Reset ok")
+	testWriterEOF(t, "huff", huffTest{input: in}, true)
+}
+
+type huffTest struct {
+	tokens      []token
+	input       string // File name of input data matching the tokens.
+	want        string // File name of data with the expected output with input available.
+	wantNoInput string // File name of the expected output when no input is available.
+}
+
+const ml = 0x7fc00000 // Maximum length token. Used to reduce the size of writeBlockTests
+
+var writeBlockTests = []huffTest{
+	{
+		input:       "testdata/huffman-null-max.in",
+		want:        "testdata/huffman-null-max.%s.expect",
+		wantNoInput: "testdata/huffman-null-max.%s.expect-noinput",
+		tokens:      []token{0x0, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, 0x0, 0x0},
+	},
+	{
+		input:       "testdata/huffman-pi.in",
+		want:        "testdata/huffman-pi.%s.expect",
+		wantNoInput: "testdata/huffman-pi.%s.expect-noinput",
+		tokens:      []token{0x33, 0x2e, 0x31, 0x34, 0x31, 0x35, 0x39, 0x32, 0x36, 0x35, 0x33, 0x35, 0x38, 0x39, 0x37, 0x39, 0x33, 0x32, 0x33, 0x38, 0x34, 0x36, 0x32, 0x36, 0x34, 0x33, 0x33, 0x38, 0x33, 0x32, 0x37, 0x39, 0x35, 0x30, 0x32, 0x38, 0x38, 0x34, 0x31, 0x39, 0x37, 0x31, 0x36, 0x39, 0x33, 0x39, 0x39, 0x33, 0x37, 0x35, 0x31, 0x30, 0x35, 0x38, 0x32, 0x30, 0x39, 0x37, 0x34, 0x39, 0x34, 0x34, 0x35, 0x39, 0x32, 0x33, 0x30, 0x37, 0x38, 0x31, 0x36, 0x34, 0x30, 0x36, 0x32, 0x38, 0x36, 0x32, 0x30, 0x38, 0x39, 0x39, 0x38, 0x36, 0x32, 0x38, 0x30, 0x33, 0x34, 0x38, 0x32, 0x35, 0x33, 0x34, 0x32, 0x31, 0x31, 0x37, 0x30, 0x36, 0x37, 0x39, 0x38, 0x32, 0x31, 0x34, 0x38, 0x30, 0x38, 0x36, 0x35, 0x31, 0x33, 0x32, 0x38, 0x32, 0x33, 0x30, 0x36, 0x36, 0x34, 0x37, 0x30, 0x39, 0x33, 0x38, 0x34, 0x34, 0x36, 0x30, 0x39, 0x35, 0x35, 0x30, 0x35, 0x38, 0x32, 0x32, 0x33, 0x31, 0x37, 0x32, 0x35, 0x33, 0x35, 0x39, 0x34, 0x30, 0x38, 0x31, 0x32, 0x38, 0x34, 0x38, 0x31, 0x31, 0x31, 0x37, 0x34, 0x4040007e, 0x34, 0x31, 0x30, 0x32, 0x37, 0x30, 0x31, 0x39, 0x33, 0x38, 0x35, 0x32, 0x31, 0x31, 0x30, 0x35, 0x35, 0x35, 0x39, 0x36, 0x34, 0x34, 0x36, 0x32, 0x32, 0x39, 0x34, 0x38, 0x39, 0x35, 0x34, 0x39, 0x33, 0x30, 0x33, 0x38, 0x31, 0x40400012, 0x32, 0x38, 0x38, 0x31, 0x30, 0x39, 0x37, 0x35, 0x36, 0x36, 0x35, 0x39, 0x33, 0x33, 0x34, 0x34, 0x36, 0x40400047, 0x37, 0x35, 0x36, 0x34, 0x38, 0x32, 0x33, 0x33, 0x37, 0x38, 0x36, 0x37, 0x38, 0x33, 0x31, 0x36, 0x35, 0x32, 0x37, 0x31, 0x32, 0x30, 0x31, 0x39, 0x30, 0x39, 0x31, 0x34, 0x4040001a, 0x35, 0x36, 0x36, 0x39, 0x32, 0x33, 0x34, 0x36, 0x404000b2, 0x36, 0x31, 0x30, 0x34, 0x35, 0x34, 0x33, 0x32, 0x36, 0x40400032, 0x31, 0x33, 0x33, 0x39, 0x33, 0x36, 0x30, 0x37, 0x32, 0x36, 0x30, 0x32, 0x34, 0x39, 0x31, 0x34, 0x31, 0x32, 0x37, 0x33, 0x37, 0x32, 0x34, 0x35, 0x38, 0x37, 0x30, 0x30, 0x36, 0x36, 0x30, 0x36, 0x33, 0x31, 0x35, 0x35, 0x38, 0x38, 0x31, 0x37, 0x34, 0x38, 0x38, 0x31, 0x35, 0x32, 0x30, 0x39, 0x32, 0x30, 0x39, 0x36, 0x32, 0x38, 0x32, 0x39, 0x32, 0x35, 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+	},
+	{
+		input:       "testdata/huffman-rand-1k.in",
+		want:        "testdata/huffman-rand-1k.%s.expect",
+		wantNoInput: "testdata/huffman-rand-1k.%s.expect-noinput",
+		tokens:      []token{0xf8, 0x8b, 0x96, 0x76, 0x48, 0xd, 0x85, 0x94, 0x25, 0x80, 0xaf, 0xc2, 0xfe, 0x8d, 0xe8, 0x20, 0xeb, 0x17, 0x86, 0xc9, 0xb7, 0xc5, 0xde, 0x6, 0xea, 0x7d, 0x18, 0x8b, 0xe7, 0x3e, 0x7, 0xda, 0xdf, 0xff, 0x6c, 0x73, 0xde, 0xcc, 0xe7, 0x6d, 0x8d, 0x4, 0x19, 0x49, 0x7f, 0x47, 0x1f, 0x48, 0x15, 0xb0, 0xe8, 0x9e, 0xf2, 0x31, 0x59, 0xde, 0x34, 0xb4, 0x5b, 0xe5, 0xe0, 0x9, 0x11, 0x30, 0xc2, 0x88, 0x5b, 0x7c, 0x5d, 0x14, 0x13, 0x6f, 0x23, 0xa9, 0xd, 0xbc, 0x2d, 0x23, 0xbe, 0xd9, 0xed, 0x75, 0x4, 0x6c, 0x99, 0xdf, 0xfd, 0x70, 0x66, 0xe6, 0xee, 0xd9, 0xb1, 0x9e, 0x6e, 0x83, 0x59, 0xd5, 0xd4, 0x80, 0x59, 0x98, 0x77, 0x89, 0x43, 0x38, 0xc9, 0xaf, 0x30, 0x32, 0x9a, 0x20, 0x1b, 0x46, 0x3d, 0x67, 0x6e, 0xd7, 0x72, 0x9e, 0x4e, 0x21, 0x4f, 0xc6, 0xe0, 0xd4, 0x7b, 0x4, 0x8d, 0xa5, 0x3, 0xf6, 0x5, 0x9b, 0x6b, 0xdc, 0x2a, 0x93, 0x77, 0x28, 0xfd, 0xb4, 0x62, 0xda, 0x20, 0xe7, 0x1f, 0xab, 0x6b, 0x51, 0x43, 0x39, 0x2f, 0xa0, 0x92, 0x1, 0x6c, 0x75, 0x3e, 0xf4, 0x35, 0xfd, 0x43, 0x2e, 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+	},
+	{
+		input:       "testdata/huffman-rand-limit.in",
+		want:        "testdata/huffman-rand-limit.%s.expect",
+		wantNoInput: "testdata/huffman-rand-limit.%s.expect-noinput",
+		tokens:      []token{0x61, 0x51c00000, 0xa, 0xf8, 0x8b, 0x96, 0x76, 0x48, 0xa, 0x85, 0x94, 0x25, 0x80, 0xaf, 0xc2, 0xfe, 0x8d, 0xe8, 0x20, 0xeb, 0x17, 0x86, 0xc9, 0xb7, 0xc5, 0xde, 0x6, 0xea, 0x7d, 0x18, 0x8b, 0xe7, 0x3e, 0x7, 0xda, 0xdf, 0xff, 0x6c, 0x73, 0xde, 0xcc, 0xe7, 0x6d, 0x8d, 0x4, 0x19, 0x49, 0x7f, 0x47, 0x1f, 0x48, 0x15, 0xb0, 0xe8, 0x9e, 0xf2, 0x31, 0x59, 0xde, 0x34, 0xb4, 0x5b, 0xe5, 0xe0, 0x9, 0x11, 0x30, 0xc2, 0x88, 0x5b, 0x7c, 0x5d, 0x14, 0x13, 0x6f, 0x23, 0xa9, 0xa, 0xbc, 0x2d, 0x23, 0xbe, 0xd9, 0xed, 0x75, 0x4, 0x6c, 0x99, 0xdf, 0xfd, 0x70, 0x66, 0xe6, 0xee, 0xd9, 0xb1, 0x9e, 0x6e, 0x83, 0x59, 0xd5, 0xd4, 0x80, 0x59, 0x98, 0x77, 0x89, 0x43, 0x38, 0xc9, 0xaf, 0x30, 0x32, 0x9a, 0x20, 0x1b, 0x46, 0x3d, 0x67, 0x6e, 0xd7, 0x72, 0x9e, 0x4e, 0x21, 0x4f, 0xc6, 0xe0, 0xd4, 0x7b, 0x4, 0x8d, 0xa5, 0x3, 0xf6, 0x5, 0x9b, 0x6b, 0xdc, 0x2a, 0x93, 0x77, 0x28, 0xfd, 0xb4, 0x62, 0xda, 0x20, 0xe7, 0x1f, 0xab, 0x6b, 0x51, 0x43, 0x39, 0x2f, 0xa0, 0x92, 0x1, 0x6c, 0x75, 0x3e, 0xf4, 0x35, 0xfd, 0x43, 0x2e, 0xf7, 0xa4, 0x75, 0xda, 0xea, 0x9b, 0xa},
+	},
+	{
+		input:       "testdata/huffman-shifts.in",
+		want:        "testdata/huffman-shifts.%s.expect",
+		wantNoInput: "testdata/huffman-shifts.%s.expect-noinput",
+		tokens:      []token{0x31, 0x30, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x52400001, 0xd, 0xa, 0x32, 0x33, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7f400001},
+	},
+	{
+		input:       "testdata/huffman-text-shift.in",
+		want:        "testdata/huffman-text-shift.%s.expect",
+		wantNoInput: "testdata/huffman-text-shift.%s.expect-noinput",
+		tokens:      []token{0x2f, 0x2f, 0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x32, 0x30, 0x30, 0x39, 0x54, 0x68, 0x47, 0x6f, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x2e, 0x41, 0x6c, 0x6c, 0x40800016, 0x72, 0x72, 0x76, 0x64, 0x2e, 0xd, 0xa, 0x2f, 0x2f, 0x55, 0x6f, 0x66, 0x74, 0x68, 0x69, 0x6f, 0x75, 0x72, 0x63, 0x63, 0x6f, 0x64, 0x69, 0x67, 0x6f, 0x76, 0x72, 0x6e, 0x64, 0x62, 0x79, 0x42, 0x53, 0x44, 0x2d, 0x74, 0x79, 0x6c, 0x40400020, 0x6c, 0x69, 0x63, 0x6e, 0x74, 0x68, 0x74, 0x63, 0x6e, 0x62, 0x66, 0x6f, 0x75, 0x6e, 0x64, 0x69, 0x6e, 0x74, 0x68, 0x4c, 0x49, 0x43, 0x45, 0x4e, 0x53, 0x45, 0x66, 0x69, 0x6c, 0x2e, 0xd, 0xa, 0xd, 0xa, 0x70, 0x63, 0x6b, 0x67, 0x6d, 0x69, 0x6e, 0x4040000a, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x22, 0x6f, 0x22, 0x4040000c, 0x66, 0x75, 0x6e, 0x63, 0x6d, 0x69, 0x6e, 0x28, 0x29, 0x7b, 0xd, 0xa, 0x9, 0x76, 0x72, 0x62, 0x3d, 0x6d, 0x6b, 0x28, 0x5b, 0x5d, 0x62, 0x79, 0x74, 0x2c, 0x36, 0x35, 0x35, 0x33, 0x35, 0x29, 0xd, 0xa, 0x9, 0x66, 0x2c, 0x5f, 0x3a, 0x3d, 0x6f, 0x2e, 0x43, 0x72, 0x74, 0x28, 0x22, 0x68, 0x75, 0x66, 0x66, 0x6d, 0x6e, 0x2d, 0x6e, 0x75, 0x6c, 0x6c, 0x2d, 0x6d, 0x78, 0x2e, 0x69, 0x6e, 0x22, 0x40800021, 0x2e, 0x57, 0x72, 0x69, 0x74, 0x28, 0x62, 0x29, 0xd, 0xa, 0x7d, 0xd, 0xa, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x58, 0x78, 0x79, 0x7a, 0x21, 0x22, 0x23, 0xc2, 0xa4, 0x25, 0x26, 0x2f, 0x3f, 0x22},
+	},
+	{
+		input:       "testdata/huffman-text.in",
+		want:        "testdata/huffman-text.%s.expect",
+		wantNoInput: "testdata/huffman-text.%s.expect-noinput",
+		tokens:      []token{0x2f, 0x2f, 0x20, 0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x20, 0x32, 0x30, 0x30, 0x39, 0x20, 0x54, 0x68, 0x65, 0x20, 0x47, 0x6f, 0x20, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x73, 0x2e, 0x20, 0x41, 0x6c, 0x6c, 0x20, 0x4080001e, 0x73, 0x20, 0x72, 0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x2e, 0xd, 0xa, 0x2f, 0x2f, 0x20, 0x55, 0x73, 0x65, 0x20, 0x6f, 0x66, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x20, 0x63, 0x6f, 0x64, 0x65, 0x20, 0x69, 0x73, 0x20, 0x67, 0x6f, 0x76, 0x65, 0x72, 0x6e, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x61, 0x20, 0x42, 0x53, 0x44, 0x2d, 0x73, 0x74, 0x79, 0x6c, 0x65, 0x40800036, 0x6c, 0x69, 0x63, 0x65, 0x6e, 0x73, 0x65, 0x20, 0x74, 0x68, 0x61, 0x74, 0x20, 0x63, 0x61, 0x6e, 0x20, 0x62, 0x65, 0x20, 0x66, 0x6f, 0x75, 0x6e, 0x64, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x4c, 0x49, 0x43, 0x45, 0x4e, 0x53, 0x45, 0x20, 0x66, 0x69, 0x6c, 0x65, 0x2e, 0xd, 0xa, 0xd, 0xa, 0x70, 0x61, 0x63, 0x6b, 0x61, 0x67, 0x65, 0x20, 0x6d, 0x61, 0x69, 0x6e, 0x4040000f, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x22, 0x6f, 0x73, 0x22, 0x4040000e, 0x66, 0x75, 0x6e, 0x63, 0x4080001b, 0x28, 0x29, 0x20, 0x7b, 0xd, 0xa, 0x9, 0x76, 0x61, 0x72, 0x20, 0x62, 0x20, 0x3d, 0x20, 0x6d, 0x61, 0x6b, 0x65, 0x28, 0x5b, 0x5d, 0x62, 0x79, 0x74, 0x65, 0x2c, 0x20, 0x36, 0x35, 0x35, 0x33, 0x35, 0x29, 0xd, 0xa, 0x9, 0x66, 0x2c, 0x20, 0x5f, 0x20, 0x3a, 0x3d, 0x20, 0x6f, 0x73, 0x2e, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x28, 0x22, 0x68, 0x75, 0x66, 0x66, 0x6d, 0x61, 0x6e, 0x2d, 0x6e, 0x75, 0x6c, 0x6c, 0x2d, 0x6d, 0x61, 0x78, 0x2e, 0x69, 0x6e, 0x22, 0x4080002a, 0x2e, 0x57, 0x72, 0x69, 0x74, 0x65, 0x28, 0x62, 0x29, 0xd, 0xa, 0x7d, 0xd, 0xa},
+	},
+	{
+		input:       "testdata/huffman-zero.in",
+		want:        "testdata/huffman-zero.%s.expect",
+		wantNoInput: "testdata/huffman-zero.%s.expect-noinput",
+		tokens:      []token{0x30, ml, 0x4b800000},
+	},
+	{
+		input:       "",
+		want:        "",
+		wantNoInput: "testdata/null-long-match.%s.expect-noinput",
+		tokens:      []token{0x0, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, 0x41400000},
+	},
+}
+
+// TestWriteBlock tests if the writeBlock encoding has changed.
+// To update the reference files use the "-update" flag on the test.
+func TestWriteBlock(t *testing.T) {
+	for _, test := range writeBlockTests {
+		testBlock(t, test, "wb")
+	}
+}
+
+// TestWriteBlockDynamic tests if the writeBlockDynamic encoding has changed.
+// To update the reference files use the "-update" flag on the test.
+func TestWriteBlockDynamic(t *testing.T) {
+	for _, test := range writeBlockTests {
+		testBlock(t, test, "dyn")
+	}
+}
+
+// TestWriteBlockDynamic tests if the writeBlockDynamic encoding has changed.
+// To update the reference files use the "-update" flag on the test.
+func TestWriteBlockDynamicSync(t *testing.T) {
+	for _, test := range writeBlockTests {
+		testBlock(t, test, "sync")
+	}
+}
+
+// testBlock tests a block against its references,
+// or regenerate the references, if "-update" flag is set.
+func testBlock(t *testing.T, test huffTest, ttype string) {
+	if test.want != "" {
+		test.want = fmt.Sprintf(test.want, ttype)
+	}
+	const gotSuffix = ".got"
+	test.wantNoInput = fmt.Sprintf(test.wantNoInput, ttype)
+	tokens := indexTokens(test.tokens)
+	if *update {
+		if test.input != "" {
+			t.Logf("Updating %q", test.want)
+			input, err := os.ReadFile(test.input)
+			if err != nil {
+				t.Error(err)
+				return
+			}
+
+			f, err := os.Create(test.want)
+			if err != nil {
+				t.Error(err)
+				return
+			}
+			defer f.Close()
+			bw := newHuffmanBitWriter(f)
+			writeToType(t, ttype, bw, tokens, input)
+		}
+
+		t.Logf("Updating %q", test.wantNoInput)
+		f, err := os.Create(test.wantNoInput)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		defer f.Close()
+		bw := newHuffmanBitWriter(f)
+		writeToType(t, ttype, bw, tokens, nil)
+		return
+	}
+
+	if test.input != "" {
+		t.Logf("Testing %q", test.want)
+		input, err := os.ReadFile(test.input)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		want, err := os.ReadFile(test.want)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		var buf bytes.Buffer
+		bw := newHuffmanBitWriter(&buf)
+		writeToType(t, ttype, bw, tokens, input)
+
+		got := buf.Bytes()
+		if !bytes.Equal(got, want) {
+			t.Errorf("writeBlock did not yield expected result for file %q with input. See %q", test.want, test.want+gotSuffix)
+			if err := os.WriteFile(test.want+gotSuffix, got, 0666); err != nil {
+				t.Error(err)
+			}
+		}
+		t.Log("Output ok")
+
+		// Test if the writer produces the same output after reset.
+		buf.Reset()
+		bw.reset(&buf)
+		writeToType(t, ttype, bw, tokens, input)
+		bw.flush()
+		got = buf.Bytes()
+		if !bytes.Equal(got, want) {
+			t.Errorf("reset: writeBlock did not yield expected result for file %q with input. See %q", test.want, test.want+".reset"+gotSuffix)
+			if err := os.WriteFile(test.want+".reset"+gotSuffix, got, 0666); err != nil {
+				t.Error(err)
+			}
+			return
+		}
+		t.Log("Reset ok")
+		testWriterEOF(t, "wb", test, true)
+	}
+	t.Logf("Testing %q", test.wantNoInput)
+	wantNI, err := os.ReadFile(test.wantNoInput)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	var buf bytes.Buffer
+	bw := newHuffmanBitWriter(&buf)
+	writeToType(t, ttype, bw, tokens, nil)
+
+	got := buf.Bytes()
+	if !bytes.Equal(got, wantNI) {
+		t.Errorf("writeBlock did not yield expected result for file %q with input. See %q", test.wantNoInput, test.wantNoInput+gotSuffix)
+		if err := os.WriteFile(test.wantNoInput+gotSuffix, got, 0666); err != nil {
+			t.Error(err)
+		}
+	} else if got[0]&1 == 1 {
+		t.Error("got unexpected EOF")
+		return
+	}
+
+	t.Log("Output ok")
+
+	// Test if the writer produces the same output after reset.
+	buf.Reset()
+	bw.reset(&buf)
+	writeToType(t, ttype, bw, tokens, nil)
+	bw.flush()
+	got = buf.Bytes()
+	if !bytes.Equal(got, wantNI) {
+		t.Errorf("reset: writeBlock did not yield expected result for file %q without input. See %q", test.wantNoInput, test.wantNoInput+".reset"+gotSuffix)
+		if err := os.WriteFile(test.wantNoInput+".reset"+gotSuffix, got, 0666); err != nil {
+			t.Error(err)
+		}
+		return
+	}
+	t.Log("Reset ok")
+	testWriterEOF(t, "wb", test, false)
+}
+
+func writeToType(t *testing.T, ttype string, bw *huffmanBitWriter, tok tokens, input []byte) {
+	switch ttype {
+	case "wb":
+		bw.writeBlock(&tok, false, input)
+	case "dyn":
+		bw.writeBlockDynamic(&tok, false, input, false)
+	case "sync":
+		bw.writeBlockDynamic(&tok, false, input, true)
+	default:
+		panic("unknown test type")
+	}
+
+	if bw.err != nil {
+		t.Error(bw.err)
+		return
+	}
+
+	bw.flush()
+	if bw.err != nil {
+		t.Error(bw.err)
+		return
+	}
+}
+
+// testWriterEOF tests if the written block contains an EOF marker.
+func testWriterEOF(t *testing.T, ttype string, test huffTest, useInput bool) {
+	if useInput && test.input == "" {
+		return
+	}
+	var input []byte
+	if useInput {
+		var err error
+		input, err = os.ReadFile(test.input)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+	}
+	var buf bytes.Buffer
+	bw := newHuffmanBitWriter(&buf)
+	tokens := indexTokens(test.tokens)
+	switch ttype {
+	case "wb":
+		bw.writeBlock(&tokens, true, input)
+	case "dyn":
+		bw.writeBlockDynamic(&tokens, true, input, true)
+	case "huff":
+		bw.writeBlockHuff(true, input, true)
+	default:
+		panic("unknown test type")
+	}
+	if bw.err != nil {
+		t.Error(bw.err)
+		return
+	}
+
+	bw.flush()
+	if bw.err != nil {
+		t.Error(bw.err)
+		return
+	}
+	b := buf.Bytes()
+	if len(b) == 0 {
+		t.Error("no output received")
+		return
+	}
+	if b[0]&1 != 1 {
+		t.Errorf("block not marked with EOF for input %q", test.input)
+		return
+	}
+	t.Log("EOF ok")
+}
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_code.go b/vendor/github.com/klauspost/compress/flate/huffman_code.go
new file mode 100644
index 0000000000..be7b58b473
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/huffman_code.go
@@ -0,0 +1,417 @@
+// Copyright 2009 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 flate
+
+import (
+	"math"
+	"math/bits"
+)
+
+const (
+	maxBitsLimit = 16
+	// number of valid literals
+	literalCount = 286
+)
+
+// hcode is a huffman code with a bit code and bit length.
+type hcode uint32
+
+func (h hcode) len() uint8 {
+	return uint8(h)
+}
+
+func (h hcode) code64() uint64 {
+	return uint64(h >> 8)
+}
+
+func (h hcode) zero() bool {
+	return h == 0
+}
+
+type huffmanEncoder struct {
+	codes    []hcode
+	bitCount [17]int32
+
+	// Allocate a reusable buffer with the longest possible frequency table.
+	// Possible lengths are codegenCodeCount, offsetCodeCount and literalCount.
+	// The largest of these is literalCount, so we allocate for that case.
+	freqcache [literalCount + 1]literalNode
+}
+
+type literalNode struct {
+	literal uint16
+	freq    uint16
+}
+
+// A levelInfo describes the state of the constructed tree for a given depth.
+type levelInfo struct {
+	// Our level.  for better printing
+	level int32
+
+	// The frequency of the last node at this level
+	lastFreq int32
+
+	// The frequency of the next character to add to this level
+	nextCharFreq int32
+
+	// The frequency of the next pair (from level below) to add to this level.
+	// Only valid if the "needed" value of the next lower level is 0.
+	nextPairFreq int32
+
+	// The number of chains remaining to generate for this level before moving
+	// up to the next level
+	needed int32
+}
+
+// set sets the code and length of an hcode.
+func (h *hcode) set(code uint16, length uint8) {
+	*h = hcode(length) | (hcode(code) << 8)
+}
+
+func newhcode(code uint16, length uint8) hcode {
+	return hcode(length) | (hcode(code) << 8)
+}
+
+func reverseBits(number uint16, bitLength byte) uint16 {
+	return bits.Reverse16(number << ((16 - bitLength) & 15))
+}
+
+func maxNode() literalNode { return literalNode{math.MaxUint16, math.MaxUint16} }
+
+func newHuffmanEncoder(size int) *huffmanEncoder {
+	// Make capacity to next power of two.
+	c := uint(bits.Len32(uint32(size - 1)))
+	return &huffmanEncoder{codes: make([]hcode, size, 1<<c)}
+}
+
+// Generates a HuffmanCode corresponding to the fixed literal table
+func generateFixedLiteralEncoding() *huffmanEncoder {
+	h := newHuffmanEncoder(literalCount)
+	codes := h.codes
+	var ch uint16
+	for ch = 0; ch < literalCount; ch++ {
+		var bits uint16
+		var size uint8
+		switch {
+		case ch < 144:
+			// size 8, 000110000  .. 10111111
+			bits = ch + 48
+			size = 8
+		case ch < 256:
+			// size 9, 110010000 .. 111111111
+			bits = ch + 400 - 144
+			size = 9
+		case ch < 280:
+			// size 7, 0000000 .. 0010111
+			bits = ch - 256
+			size = 7
+		default:
+			// size 8, 11000000 .. 11000111
+			bits = ch + 192 - 280
+			size = 8
+		}
+		codes[ch] = newhcode(reverseBits(bits, size), size)
+	}
+	return h
+}
+
+func generateFixedOffsetEncoding() *huffmanEncoder {
+	h := newHuffmanEncoder(30)
+	codes := h.codes
+	for ch := range codes {
+		codes[ch] = newhcode(reverseBits(uint16(ch), 5), 5)
+	}
+	return h
+}
+
+var fixedLiteralEncoding = generateFixedLiteralEncoding()
+var fixedOffsetEncoding = generateFixedOffsetEncoding()
+
+func (h *huffmanEncoder) bitLength(freq []uint16) int {
+	var total int
+	for i, f := range freq {
+		if f != 0 {
+			total += int(f) * int(h.codes[i].len())
+		}
+	}
+	return total
+}
+
+func (h *huffmanEncoder) bitLengthRaw(b []byte) int {
+	var total int
+	for _, f := range b {
+		total += int(h.codes[f].len())
+	}
+	return total
+}
+
+// canReuseBits returns the number of bits or math.MaxInt32 if the encoder cannot be reused.
+func (h *huffmanEncoder) canReuseBits(freq []uint16) int {
+	var total int
+	for i, f := range freq {
+		if f != 0 {
+			code := h.codes[i]
+			if code.zero() {
+				return math.MaxInt32
+			}
+			total += int(f) * int(code.len())
+		}
+	}
+	return total
+}
+
+// Return the number of literals assigned to each bit size in the Huffman encoding
+//
+// This method is only called when list.length >= 3
+// The cases of 0, 1, and 2 literals are handled by special case code.
+//
+// list  An array of the literals with non-zero frequencies
+//
+//	and their associated frequencies. The array is in order of increasing
+//	frequency, and has as its last element a special element with frequency
+//	MaxInt32
+//
+// maxBits     The maximum number of bits that should be used to encode any literal.
+//
+//	Must be less than 16.
+//
+// return      An integer array in which array[i] indicates the number of literals
+//
+//	that should be encoded in i bits.
+func (h *huffmanEncoder) bitCounts(list []literalNode, maxBits int32) []int32 {
+	if maxBits >= maxBitsLimit {
+		panic("flate: maxBits too large")
+	}
+	n := int32(len(list))
+	list = list[0 : n+1]
+	list[n] = maxNode()
+
+	// The tree can't have greater depth than n - 1, no matter what. This
+	// saves a little bit of work in some small cases
+	if maxBits > n-1 {
+		maxBits = n - 1
+	}
+
+	// Create information about each of the levels.
+	// A bogus "Level 0" whose sole purpose is so that
+	// level1.prev.needed==0.  This makes level1.nextPairFreq
+	// be a legitimate value that never gets chosen.
+	var levels [maxBitsLimit]levelInfo
+	// leafCounts[i] counts the number of literals at the left
+	// of ancestors of the rightmost node at level i.
+	// leafCounts[i][j] is the number of literals at the left
+	// of the level j ancestor.
+	var leafCounts [maxBitsLimit][maxBitsLimit]int32
+
+	// Descending to only have 1 bounds check.
+	l2f := int32(list[2].freq)
+	l1f := int32(list[1].freq)
+	l0f := int32(list[0].freq) + int32(list[1].freq)
+
+	for level := int32(1); level <= maxBits; level++ {
+		// For every level, the first two items are the first two characters.
+		// We initialize the levels as if we had already figured this out.
+		levels[level] = levelInfo{
+			level:        level,
+			lastFreq:     l1f,
+			nextCharFreq: l2f,
+			nextPairFreq: l0f,
+		}
+		leafCounts[level][level] = 2
+		if level == 1 {
+			levels[level].nextPairFreq = math.MaxInt32
+		}
+	}
+
+	// We need a total of 2*n - 2 items at top level and have already generated 2.
+	levels[maxBits].needed = 2*n - 4
+
+	level := uint32(maxBits)
+	for level < 16 {
+		l := &levels[level]
+		if l.nextPairFreq == math.MaxInt32 && l.nextCharFreq == math.MaxInt32 {
+			// We've run out of both leafs and pairs.
+			// End all calculations for this level.
+			// To make sure we never come back to this level or any lower level,
+			// set nextPairFreq impossibly large.
+			l.needed = 0
+			levels[level+1].nextPairFreq = math.MaxInt32
+			level++
+			continue
+		}
+
+		prevFreq := l.lastFreq
+		if l.nextCharFreq < l.nextPairFreq {
+			// The next item on this row is a leaf node.
+			n := leafCounts[level][level] + 1
+			l.lastFreq = l.nextCharFreq
+			// Lower leafCounts are the same of the previous node.
+			leafCounts[level][level] = n
+			e := list[n]
+			if e.literal < math.MaxUint16 {
+				l.nextCharFreq = int32(e.freq)
+			} else {
+				l.nextCharFreq = math.MaxInt32
+			}
+		} else {
+			// The next item on this row is a pair from the previous row.
+			// nextPairFreq isn't valid until we generate two
+			// more values in the level below
+			l.lastFreq = l.nextPairFreq
+			// Take leaf counts from the lower level, except counts[level] remains the same.
+			if true {
+				save := leafCounts[level][level]
+				leafCounts[level] = leafCounts[level-1]
+				leafCounts[level][level] = save
+			} else {
+				copy(leafCounts[level][:level], leafCounts[level-1][:level])
+			}
+			levels[l.level-1].needed = 2
+		}
+
+		if l.needed--; l.needed == 0 {
+			// We've done everything we need to do for this level.
+			// Continue calculating one level up. Fill in nextPairFreq
+			// of that level with the sum of the two nodes we've just calculated on
+			// this level.
+			if l.level == maxBits {
+				// All done!
+				break
+			}
+			levels[l.level+1].nextPairFreq = prevFreq + l.lastFreq
+			level++
+		} else {
+			// If we stole from below, move down temporarily to replenish it.
+			for levels[level-1].needed > 0 {
+				level--
+			}
+		}
+	}
+
+	// Somethings is wrong if at the end, the top level is null or hasn't used
+	// all of the leaves.
+	if leafCounts[maxBits][maxBits] != n {
+		panic("leafCounts[maxBits][maxBits] != n")
+	}
+
+	bitCount := h.bitCount[:maxBits+1]
+	bits := 1
+	counts := &leafCounts[maxBits]
+	for level := maxBits; level > 0; level-- {
+		// chain.leafCount gives the number of literals requiring at least "bits"
+		// bits to encode.
+		bitCount[bits] = counts[level] - counts[level-1]
+		bits++
+	}
+	return bitCount
+}
+
+// Look at the leaves and assign them a bit count and an encoding as specified
+// in RFC 1951 3.2.2
+func (h *huffmanEncoder) assignEncodingAndSize(bitCount []int32, list []literalNode) {
+	code := uint16(0)
+	for n, bits := range bitCount {
+		code <<= 1
+		if n == 0 || bits == 0 {
+			continue
+		}
+		// The literals list[len(list)-bits] .. list[len(list)-bits]
+		// are encoded using "bits" bits, and get the values
+		// code, code + 1, ....  The code values are
+		// assigned in literal order (not frequency order).
+		chunk := list[len(list)-int(bits):]
+
+		sortByLiteral(chunk)
+		for _, node := range chunk {
+			h.codes[node.literal] = newhcode(reverseBits(code, uint8(n)), uint8(n))
+			code++
+		}
+		list = list[0 : len(list)-int(bits)]
+	}
+}
+
+// Update this Huffman Code object to be the minimum code for the specified frequency count.
+//
+// freq  An array of frequencies, in which frequency[i] gives the frequency of literal i.
+// maxBits  The maximum number of bits to use for any literal.
+func (h *huffmanEncoder) generate(freq []uint16, maxBits int32) {
+	list := h.freqcache[:len(freq)+1]
+	codes := h.codes[:len(freq)]
+	// Number of non-zero literals
+	count := 0
+	// Set list to be the set of all non-zero literals and their frequencies
+	for i, f := range freq {
+		if f != 0 {
+			list[count] = literalNode{uint16(i), f}
+			count++
+		} else {
+			codes[i] = 0
+		}
+	}
+	list[count] = literalNode{}
+
+	list = list[:count]
+	if count <= 2 {
+		// Handle the small cases here, because they are awkward for the general case code. With
+		// two or fewer literals, everything has bit length 1.
+		for i, node := range list {
+			// "list" is in order of increasing literal value.
+			h.codes[node.literal].set(uint16(i), 1)
+		}
+		return
+	}
+	sortByFreq(list)
+
+	// Get the number of literals for each bit count
+	bitCount := h.bitCounts(list, maxBits)
+	// And do the assignment
+	h.assignEncodingAndSize(bitCount, list)
+}
+
+// atLeastOne clamps the result between 1 and 15.
+func atLeastOne(v float32) float32 {
+	if v < 1 {
+		return 1
+	}
+	if v > 15 {
+		return 15
+	}
+	return v
+}
+
+func histogram(b []byte, h []uint16) {
+	if true && len(b) >= 8<<10 {
+		// Split for bigger inputs
+		histogramSplit(b, h)
+	} else {
+		h = h[:256]
+		for _, t := range b {
+			h[t]++
+		}
+	}
+}
+
+func histogramSplit(b []byte, h []uint16) {
+	// Tested, and slightly faster than 2-way.
+	// Writing to separate arrays and combining is also slightly slower.
+	h = h[:256]
+	for len(b)&3 != 0 {
+		h[b[0]]++
+		b = b[1:]
+	}
+	n := len(b) / 4
+	x, y, z, w := b[:n], b[n:], b[n+n:], b[n+n+n:]
+	y, z, w = y[:len(x)], z[:len(x)], w[:len(x)]
+	for i, t := range x {
+		v0 := &h[t]
+		v1 := &h[y[i]]
+		v3 := &h[w[i]]
+		v2 := &h[z[i]]
+		*v0++
+		*v1++
+		*v2++
+		*v3++
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_sortByFreq.go b/vendor/github.com/klauspost/compress/flate/huffman_sortByFreq.go
new file mode 100644
index 0000000000..6c05ba8c1c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/huffman_sortByFreq.go
@@ -0,0 +1,159 @@
+// Copyright 2009 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 flate
+
+// Sort sorts data.
+// It makes one call to data.Len to determine n, and O(n*log(n)) calls to
+// data.Less and data.Swap. The sort is not guaranteed to be stable.
+func sortByFreq(data []literalNode) {
+	n := len(data)
+	quickSortByFreq(data, 0, n, maxDepth(n))
+}
+
+func quickSortByFreq(data []literalNode, a, b, maxDepth int) {
+	for b-a > 12 { // Use ShellSort for slices <= 12 elements
+		if maxDepth == 0 {
+			heapSort(data, a, b)
+			return
+		}
+		maxDepth--
+		mlo, mhi := doPivotByFreq(data, a, b)
+		// Avoiding recursion on the larger subproblem guarantees
+		// a stack depth of at most lg(b-a).
+		if mlo-a < b-mhi {
+			quickSortByFreq(data, a, mlo, maxDepth)
+			a = mhi // i.e., quickSortByFreq(data, mhi, b)
+		} else {
+			quickSortByFreq(data, mhi, b, maxDepth)
+			b = mlo // i.e., quickSortByFreq(data, a, mlo)
+		}
+	}
+	if b-a > 1 {
+		// Do ShellSort pass with gap 6
+		// It could be written in this simplified form cause b-a <= 12
+		for i := a + 6; i < b; i++ {
+			if data[i].freq == data[i-6].freq && data[i].literal < data[i-6].literal || data[i].freq < data[i-6].freq {
+				data[i], data[i-6] = data[i-6], data[i]
+			}
+		}
+		insertionSortByFreq(data, a, b)
+	}
+}
+
+func doPivotByFreq(data []literalNode, lo, hi int) (midlo, midhi int) {
+	m := int(uint(lo+hi) >> 1) // Written like this to avoid integer overflow.
+	if hi-lo > 40 {
+		// Tukey's ``Ninther,'' median of three medians of three.
+		s := (hi - lo) / 8
+		medianOfThreeSortByFreq(data, lo, lo+s, lo+2*s)
+		medianOfThreeSortByFreq(data, m, m-s, m+s)
+		medianOfThreeSortByFreq(data, hi-1, hi-1-s, hi-1-2*s)
+	}
+	medianOfThreeSortByFreq(data, lo, m, hi-1)
+
+	// Invariants are:
+	//	data[lo] = pivot (set up by ChoosePivot)
+	//	data[lo < i < a] < pivot
+	//	data[a <= i < b] <= pivot
+	//	data[b <= i < c] unexamined
+	//	data[c <= i < hi-1] > pivot
+	//	data[hi-1] >= pivot
+	pivot := lo
+	a, c := lo+1, hi-1
+
+	for ; a < c && (data[a].freq == data[pivot].freq && data[a].literal < data[pivot].literal || data[a].freq < data[pivot].freq); a++ {
+	}
+	b := a
+	for {
+		for ; b < c && (data[pivot].freq == data[b].freq && data[pivot].literal > data[b].literal || data[pivot].freq > data[b].freq); b++ { // data[b] <= pivot
+		}
+		for ; b < c && (data[pivot].freq == data[c-1].freq && data[pivot].literal < data[c-1].literal || data[pivot].freq < data[c-1].freq); c-- { // data[c-1] > pivot
+		}
+		if b >= c {
+			break
+		}
+		// data[b] > pivot; data[c-1] <= pivot
+		data[b], data[c-1] = data[c-1], data[b]
+		b++
+		c--
+	}
+	// If hi-c<3 then there are duplicates (by property of median of nine).
+	// Let's be a bit more conservative, and set border to 5.
+	protect := hi-c < 5
+	if !protect && hi-c < (hi-lo)/4 {
+		// Lets test some points for equality to pivot
+		dups := 0
+		if data[pivot].freq == data[hi-1].freq && data[pivot].literal > data[hi-1].literal || data[pivot].freq > data[hi-1].freq { // data[hi-1] = pivot
+			data[c], data[hi-1] = data[hi-1], data[c]
+			c++
+			dups++
+		}
+		if data[b-1].freq == data[pivot].freq && data[b-1].literal > data[pivot].literal || data[b-1].freq > data[pivot].freq { // data[b-1] = pivot
+			b--
+			dups++
+		}
+		// m-lo = (hi-lo)/2 > 6
+		// b-lo > (hi-lo)*3/4-1 > 8
+		// ==> m < b ==> data[m] <= pivot
+		if data[m].freq == data[pivot].freq && data[m].literal > data[pivot].literal || data[m].freq > data[pivot].freq { // data[m] = pivot
+			data[m], data[b-1] = data[b-1], data[m]
+			b--
+			dups++
+		}
+		// if at least 2 points are equal to pivot, assume skewed distribution
+		protect = dups > 1
+	}
+	if protect {
+		// Protect against a lot of duplicates
+		// Add invariant:
+		//	data[a <= i < b] unexamined
+		//	data[b <= i < c] = pivot
+		for {
+			for ; a < b && (data[b-1].freq == data[pivot].freq && data[b-1].literal > data[pivot].literal || data[b-1].freq > data[pivot].freq); b-- { // data[b] == pivot
+			}
+			for ; a < b && (data[a].freq == data[pivot].freq && data[a].literal < data[pivot].literal || data[a].freq < data[pivot].freq); a++ { // data[a] < pivot
+			}
+			if a >= b {
+				break
+			}
+			// data[a] == pivot; data[b-1] < pivot
+			data[a], data[b-1] = data[b-1], data[a]
+			a++
+			b--
+		}
+	}
+	// Swap pivot into middle
+	data[pivot], data[b-1] = data[b-1], data[pivot]
+	return b - 1, c
+}
+
+// Insertion sort
+func insertionSortByFreq(data []literalNode, a, b int) {
+	for i := a + 1; i < b; i++ {
+		for j := i; j > a && (data[j].freq == data[j-1].freq && data[j].literal < data[j-1].literal || data[j].freq < data[j-1].freq); j-- {
+			data[j], data[j-1] = data[j-1], data[j]
+		}
+	}
+}
+
+// quickSortByFreq, loosely following Bentley and McIlroy,
+// ``Engineering a Sort Function,'' SP&E November 1993.
+
+// medianOfThreeSortByFreq moves the median of the three values data[m0], data[m1], data[m2] into data[m1].
+func medianOfThreeSortByFreq(data []literalNode, m1, m0, m2 int) {
+	// sort 3 elements
+	if data[m1].freq == data[m0].freq && data[m1].literal < data[m0].literal || data[m1].freq < data[m0].freq {
+		data[m1], data[m0] = data[m0], data[m1]
+	}
+	// data[m0] <= data[m1]
+	if data[m2].freq == data[m1].freq && data[m2].literal < data[m1].literal || data[m2].freq < data[m1].freq {
+		data[m2], data[m1] = data[m1], data[m2]
+		// data[m0] <= data[m2] && data[m1] < data[m2]
+		if data[m1].freq == data[m0].freq && data[m1].literal < data[m0].literal || data[m1].freq < data[m0].freq {
+			data[m1], data[m0] = data[m0], data[m1]
+		}
+	}
+	// now data[m0] <= data[m1] <= data[m2]
+}
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_sortByLiteral.go b/vendor/github.com/klauspost/compress/flate/huffman_sortByLiteral.go
new file mode 100644
index 0000000000..93f1aea109
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/huffman_sortByLiteral.go
@@ -0,0 +1,201 @@
+// Copyright 2009 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 flate
+
+// Sort sorts data.
+// It makes one call to data.Len to determine n, and O(n*log(n)) calls to
+// data.Less and data.Swap. The sort is not guaranteed to be stable.
+func sortByLiteral(data []literalNode) {
+	n := len(data)
+	quickSort(data, 0, n, maxDepth(n))
+}
+
+func quickSort(data []literalNode, a, b, maxDepth int) {
+	for b-a > 12 { // Use ShellSort for slices <= 12 elements
+		if maxDepth == 0 {
+			heapSort(data, a, b)
+			return
+		}
+		maxDepth--
+		mlo, mhi := doPivot(data, a, b)
+		// Avoiding recursion on the larger subproblem guarantees
+		// a stack depth of at most lg(b-a).
+		if mlo-a < b-mhi {
+			quickSort(data, a, mlo, maxDepth)
+			a = mhi // i.e., quickSort(data, mhi, b)
+		} else {
+			quickSort(data, mhi, b, maxDepth)
+			b = mlo // i.e., quickSort(data, a, mlo)
+		}
+	}
+	if b-a > 1 {
+		// Do ShellSort pass with gap 6
+		// It could be written in this simplified form cause b-a <= 12
+		for i := a + 6; i < b; i++ {
+			if data[i].literal < data[i-6].literal {
+				data[i], data[i-6] = data[i-6], data[i]
+			}
+		}
+		insertionSort(data, a, b)
+	}
+}
+func heapSort(data []literalNode, a, b int) {
+	first := a
+	lo := 0
+	hi := b - a
+
+	// Build heap with greatest element at top.
+	for i := (hi - 1) / 2; i >= 0; i-- {
+		siftDown(data, i, hi, first)
+	}
+
+	// Pop elements, largest first, into end of data.
+	for i := hi - 1; i >= 0; i-- {
+		data[first], data[first+i] = data[first+i], data[first]
+		siftDown(data, lo, i, first)
+	}
+}
+
+// siftDown implements the heap property on data[lo, hi).
+// first is an offset into the array where the root of the heap lies.
+func siftDown(data []literalNode, lo, hi, first int) {
+	root := lo
+	for {
+		child := 2*root + 1
+		if child >= hi {
+			break
+		}
+		if child+1 < hi && data[first+child].literal < data[first+child+1].literal {
+			child++
+		}
+		if data[first+root].literal > data[first+child].literal {
+			return
+		}
+		data[first+root], data[first+child] = data[first+child], data[first+root]
+		root = child
+	}
+}
+func doPivot(data []literalNode, lo, hi int) (midlo, midhi int) {
+	m := int(uint(lo+hi) >> 1) // Written like this to avoid integer overflow.
+	if hi-lo > 40 {
+		// Tukey's ``Ninther,'' median of three medians of three.
+		s := (hi - lo) / 8
+		medianOfThree(data, lo, lo+s, lo+2*s)
+		medianOfThree(data, m, m-s, m+s)
+		medianOfThree(data, hi-1, hi-1-s, hi-1-2*s)
+	}
+	medianOfThree(data, lo, m, hi-1)
+
+	// Invariants are:
+	//	data[lo] = pivot (set up by ChoosePivot)
+	//	data[lo < i < a] < pivot
+	//	data[a <= i < b] <= pivot
+	//	data[b <= i < c] unexamined
+	//	data[c <= i < hi-1] > pivot
+	//	data[hi-1] >= pivot
+	pivot := lo
+	a, c := lo+1, hi-1
+
+	for ; a < c && data[a].literal < data[pivot].literal; a++ {
+	}
+	b := a
+	for {
+		for ; b < c && data[pivot].literal > data[b].literal; b++ { // data[b] <= pivot
+		}
+		for ; b < c && data[pivot].literal < data[c-1].literal; c-- { // data[c-1] > pivot
+		}
+		if b >= c {
+			break
+		}
+		// data[b] > pivot; data[c-1] <= pivot
+		data[b], data[c-1] = data[c-1], data[b]
+		b++
+		c--
+	}
+	// If hi-c<3 then there are duplicates (by property of median of nine).
+	// Let's be a bit more conservative, and set border to 5.
+	protect := hi-c < 5
+	if !protect && hi-c < (hi-lo)/4 {
+		// Lets test some points for equality to pivot
+		dups := 0
+		if data[pivot].literal > data[hi-1].literal { // data[hi-1] = pivot
+			data[c], data[hi-1] = data[hi-1], data[c]
+			c++
+			dups++
+		}
+		if data[b-1].literal > data[pivot].literal { // data[b-1] = pivot
+			b--
+			dups++
+		}
+		// m-lo = (hi-lo)/2 > 6
+		// b-lo > (hi-lo)*3/4-1 > 8
+		// ==> m < b ==> data[m] <= pivot
+		if data[m].literal > data[pivot].literal { // data[m] = pivot
+			data[m], data[b-1] = data[b-1], data[m]
+			b--
+			dups++
+		}
+		// if at least 2 points are equal to pivot, assume skewed distribution
+		protect = dups > 1
+	}
+	if protect {
+		// Protect against a lot of duplicates
+		// Add invariant:
+		//	data[a <= i < b] unexamined
+		//	data[b <= i < c] = pivot
+		for {
+			for ; a < b && data[b-1].literal > data[pivot].literal; b-- { // data[b] == pivot
+			}
+			for ; a < b && data[a].literal < data[pivot].literal; a++ { // data[a] < pivot
+			}
+			if a >= b {
+				break
+			}
+			// data[a] == pivot; data[b-1] < pivot
+			data[a], data[b-1] = data[b-1], data[a]
+			a++
+			b--
+		}
+	}
+	// Swap pivot into middle
+	data[pivot], data[b-1] = data[b-1], data[pivot]
+	return b - 1, c
+}
+
+// Insertion sort
+func insertionSort(data []literalNode, a, b int) {
+	for i := a + 1; i < b; i++ {
+		for j := i; j > a && data[j].literal < data[j-1].literal; j-- {
+			data[j], data[j-1] = data[j-1], data[j]
+		}
+	}
+}
+
+// maxDepth returns a threshold at which quicksort should switch
+// to heapsort. It returns 2*ceil(lg(n+1)).
+func maxDepth(n int) int {
+	var depth int
+	for i := n; i > 0; i >>= 1 {
+		depth++
+	}
+	return depth * 2
+}
+
+// medianOfThree moves the median of the three values data[m0], data[m1], data[m2] into data[m1].
+func medianOfThree(data []literalNode, m1, m0, m2 int) {
+	// sort 3 elements
+	if data[m1].literal < data[m0].literal {
+		data[m1], data[m0] = data[m0], data[m1]
+	}
+	// data[m0] <= data[m1]
+	if data[m2].literal < data[m1].literal {
+		data[m2], data[m1] = data[m1], data[m2]
+		// data[m0] <= data[m2] && data[m1] < data[m2]
+		if data[m1].literal < data[m0].literal {
+			data[m1], data[m0] = data[m0], data[m1]
+		}
+	}
+	// now data[m0] <= data[m1] <= data[m2]
+}
diff --git a/vendor/github.com/klauspost/compress/flate/inflate.go b/vendor/github.com/klauspost/compress/flate/inflate.go
new file mode 100644
index 0000000000..414c0bea9f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/inflate.go
@@ -0,0 +1,793 @@
+// Copyright 2009 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 flate implements the DEFLATE compressed data format, described in
+// RFC 1951.  The gzip and zlib packages implement access to DEFLATE-based file
+// formats.
+package flate
+
+import (
+	"bufio"
+	"compress/flate"
+	"fmt"
+	"io"
+	"math/bits"
+	"sync"
+)
+
+const (
+	maxCodeLen     = 16 // max length of Huffman code
+	maxCodeLenMask = 15 // mask for max length of Huffman code
+	// The next three numbers come from the RFC section 3.2.7, with the
+	// additional proviso in section 3.2.5 which implies that distance codes
+	// 30 and 31 should never occur in compressed data.
+	maxNumLit  = 286
+	maxNumDist = 30
+	numCodes   = 19 // number of codes in Huffman meta-code
+
+	debugDecode = false
+)
+
+// Value of length - 3 and extra bits.
+type lengthExtra struct {
+	length, extra uint8
+}
+
+var decCodeToLen = [32]lengthExtra{{length: 0x0, extra: 0x0}, {length: 0x1, extra: 0x0}, {length: 0x2, extra: 0x0}, {length: 0x3, extra: 0x0}, {length: 0x4, extra: 0x0}, {length: 0x5, extra: 0x0}, {length: 0x6, extra: 0x0}, {length: 0x7, extra: 0x0}, {length: 0x8, extra: 0x1}, {length: 0xa, extra: 0x1}, {length: 0xc, extra: 0x1}, {length: 0xe, extra: 0x1}, {length: 0x10, extra: 0x2}, {length: 0x14, extra: 0x2}, {length: 0x18, extra: 0x2}, {length: 0x1c, extra: 0x2}, {length: 0x20, extra: 0x3}, {length: 0x28, extra: 0x3}, {length: 0x30, extra: 0x3}, {length: 0x38, extra: 0x3}, {length: 0x40, extra: 0x4}, {length: 0x50, extra: 0x4}, {length: 0x60, extra: 0x4}, {length: 0x70, extra: 0x4}, {length: 0x80, extra: 0x5}, {length: 0xa0, extra: 0x5}, {length: 0xc0, extra: 0x5}, {length: 0xe0, extra: 0x5}, {length: 0xff, extra: 0x0}, {length: 0x0, extra: 0x0}, {length: 0x0, extra: 0x0}, {length: 0x0, extra: 0x0}}
+
+var bitMask32 = [32]uint32{
+	0, 1, 3, 7, 0xF, 0x1F, 0x3F, 0x7F, 0xFF,
+	0x1FF, 0x3FF, 0x7FF, 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF,
+	0x1ffff, 0x3ffff, 0x7FFFF, 0xfFFFF, 0x1fFFFF, 0x3fFFFF, 0x7fFFFF, 0xffFFFF,
+	0x1ffFFFF, 0x3ffFFFF, 0x7ffFFFF, 0xfffFFFF, 0x1fffFFFF, 0x3fffFFFF, 0x7fffFFFF,
+} // up to 32 bits
+
+// Initialize the fixedHuffmanDecoder only once upon first use.
+var fixedOnce sync.Once
+var fixedHuffmanDecoder huffmanDecoder
+
+// A CorruptInputError reports the presence of corrupt input at a given offset.
+type CorruptInputError = flate.CorruptInputError
+
+// An InternalError reports an error in the flate code itself.
+type InternalError string
+
+func (e InternalError) Error() string { return "flate: internal error: " + string(e) }
+
+// A ReadError reports an error encountered while reading input.
+//
+// Deprecated: No longer returned.
+type ReadError = flate.ReadError
+
+// A WriteError reports an error encountered while writing output.
+//
+// Deprecated: No longer returned.
+type WriteError = flate.WriteError
+
+// Resetter resets a ReadCloser returned by NewReader or NewReaderDict to
+// to switch to a new underlying Reader. This permits reusing a ReadCloser
+// instead of allocating a new one.
+type Resetter interface {
+	// Reset discards any buffered data and resets the Resetter as if it was
+	// newly initialized with the given reader.
+	Reset(r io.Reader, dict []byte) error
+}
+
+// The data structure for decoding Huffman tables is based on that of
+// zlib. There is a lookup table of a fixed bit width (huffmanChunkBits),
+// For codes smaller than the table width, there are multiple entries
+// (each combination of trailing bits has the same value). For codes
+// larger than the table width, the table contains a link to an overflow
+// table. The width of each entry in the link table is the maximum code
+// size minus the chunk width.
+//
+// Note that you can do a lookup in the table even without all bits
+// filled. Since the extra bits are zero, and the DEFLATE Huffman codes
+// have the property that shorter codes come before longer ones, the
+// bit length estimate in the result is a lower bound on the actual
+// number of bits.
+//
+// See the following:
+//	http://www.gzip.org/algorithm.txt
+
+// chunk & 15 is number of bits
+// chunk >> 4 is value, including table link
+
+const (
+	huffmanChunkBits  = 9
+	huffmanNumChunks  = 1 << huffmanChunkBits
+	huffmanCountMask  = 15
+	huffmanValueShift = 4
+)
+
+type huffmanDecoder struct {
+	maxRead  int                       // the maximum number of bits we can read and not overread
+	chunks   *[huffmanNumChunks]uint16 // chunks as described above
+	links    [][]uint16                // overflow links
+	linkMask uint32                    // mask the width of the link table
+}
+
+// Initialize Huffman decoding tables from array of code lengths.
+// Following this function, h is guaranteed to be initialized into a complete
+// tree (i.e., neither over-subscribed nor under-subscribed). The exception is a
+// degenerate case where the tree has only a single symbol with length 1. Empty
+// trees are permitted.
+func (h *huffmanDecoder) init(lengths []int) bool {
+	// Sanity enables additional runtime tests during Huffman
+	// table construction. It's intended to be used during
+	// development to supplement the currently ad-hoc unit tests.
+	const sanity = false
+
+	if h.chunks == nil {
+		h.chunks = &[huffmanNumChunks]uint16{}
+	}
+	if h.maxRead != 0 {
+		*h = huffmanDecoder{chunks: h.chunks, links: h.links}
+	}
+
+	// Count number of codes of each length,
+	// compute maxRead and max length.
+	var count [maxCodeLen]int
+	var min, max int
+	for _, n := range lengths {
+		if n == 0 {
+			continue
+		}
+		if min == 0 || n < min {
+			min = n
+		}
+		if n > max {
+			max = n
+		}
+		count[n&maxCodeLenMask]++
+	}
+
+	// Empty tree. The decompressor.huffSym function will fail later if the tree
+	// is used. Technically, an empty tree is only valid for the HDIST tree and
+	// not the HCLEN and HLIT tree. However, a stream with an empty HCLEN tree
+	// is guaranteed to fail since it will attempt to use the tree to decode the
+	// codes for the HLIT and HDIST trees. Similarly, an empty HLIT tree is
+	// guaranteed to fail later since the compressed data section must be
+	// composed of at least one symbol (the end-of-block marker).
+	if max == 0 {
+		return true
+	}
+
+	code := 0
+	var nextcode [maxCodeLen]int
+	for i := min; i <= max; i++ {
+		code <<= 1
+		nextcode[i&maxCodeLenMask] = code
+		code += count[i&maxCodeLenMask]
+	}
+
+	// Check that the coding is complete (i.e., that we've
+	// assigned all 2-to-the-max possible bit sequences).
+	// Exception: To be compatible with zlib, we also need to
+	// accept degenerate single-code codings. See also
+	// TestDegenerateHuffmanCoding.
+	if code != 1<<uint(max) && !(code == 1 && max == 1) {
+		if debugDecode {
+			fmt.Println("coding failed, code, max:", code, max, code == 1<<uint(max), code == 1 && max == 1, "(one should be true)")
+		}
+		return false
+	}
+
+	h.maxRead = min
+	chunks := h.chunks[:]
+	for i := range chunks {
+		chunks[i] = 0
+	}
+
+	if max > huffmanChunkBits {
+		numLinks := 1 << (uint(max) - huffmanChunkBits)
+		h.linkMask = uint32(numLinks - 1)
+
+		// create link tables
+		link := nextcode[huffmanChunkBits+1] >> 1
+		if cap(h.links) < huffmanNumChunks-link {
+			h.links = make([][]uint16, huffmanNumChunks-link)
+		} else {
+			h.links = h.links[:huffmanNumChunks-link]
+		}
+		for j := uint(link); j < huffmanNumChunks; j++ {
+			reverse := int(bits.Reverse16(uint16(j)))
+			reverse >>= uint(16 - huffmanChunkBits)
+			off := j - uint(link)
+			if sanity && h.chunks[reverse] != 0 {
+				panic("impossible: overwriting existing chunk")
+			}
+			h.chunks[reverse] = uint16(off<<huffmanValueShift | (huffmanChunkBits + 1))
+			if cap(h.links[off]) < numLinks {
+				h.links[off] = make([]uint16, numLinks)
+			} else {
+				links := h.links[off][:0]
+				h.links[off] = links[:numLinks]
+			}
+		}
+	} else {
+		h.links = h.links[:0]
+	}
+
+	for i, n := range lengths {
+		if n == 0 {
+			continue
+		}
+		code := nextcode[n]
+		nextcode[n]++
+		chunk := uint16(i<<huffmanValueShift | n)
+		reverse := int(bits.Reverse16(uint16(code)))
+		reverse >>= uint(16 - n)
+		if n <= huffmanChunkBits {
+			for off := reverse; off < len(h.chunks); off += 1 << uint(n) {
+				// We should never need to overwrite
+				// an existing chunk. Also, 0 is
+				// never a valid chunk, because the
+				// lower 4 "count" bits should be
+				// between 1 and 15.
+				if sanity && h.chunks[off] != 0 {
+					panic("impossible: overwriting existing chunk")
+				}
+				h.chunks[off] = chunk
+			}
+		} else {
+			j := reverse & (huffmanNumChunks - 1)
+			if sanity && h.chunks[j]&huffmanCountMask != huffmanChunkBits+1 {
+				// Longer codes should have been
+				// associated with a link table above.
+				panic("impossible: not an indirect chunk")
+			}
+			value := h.chunks[j] >> huffmanValueShift
+			linktab := h.links[value]
+			reverse >>= huffmanChunkBits
+			for off := reverse; off < len(linktab); off += 1 << uint(n-huffmanChunkBits) {
+				if sanity && linktab[off] != 0 {
+					panic("impossible: overwriting existing chunk")
+				}
+				linktab[off] = chunk
+			}
+		}
+	}
+
+	if sanity {
+		// Above we've sanity checked that we never overwrote
+		// an existing entry. Here we additionally check that
+		// we filled the tables completely.
+		for i, chunk := range h.chunks {
+			if chunk == 0 {
+				// As an exception, in the degenerate
+				// single-code case, we allow odd
+				// chunks to be missing.
+				if code == 1 && i%2 == 1 {
+					continue
+				}
+				panic("impossible: missing chunk")
+			}
+		}
+		for _, linktab := range h.links {
+			for _, chunk := range linktab {
+				if chunk == 0 {
+					panic("impossible: missing chunk")
+				}
+			}
+		}
+	}
+
+	return true
+}
+
+// The actual read interface needed by NewReader.
+// If the passed in io.Reader does not also have ReadByte,
+// the NewReader will introduce its own buffering.
+type Reader interface {
+	io.Reader
+	io.ByteReader
+}
+
+// Decompress state.
+type decompressor struct {
+	// Input source.
+	r       Reader
+	roffset int64
+
+	// Huffman decoders for literal/length, distance.
+	h1, h2 huffmanDecoder
+
+	// Length arrays used to define Huffman codes.
+	bits     *[maxNumLit + maxNumDist]int
+	codebits *[numCodes]int
+
+	// Output history, buffer.
+	dict dictDecoder
+
+	// Next step in the decompression,
+	// and decompression state.
+	step      func(*decompressor)
+	stepState int
+	err       error
+	toRead    []byte
+	hl, hd    *huffmanDecoder
+	copyLen   int
+	copyDist  int
+
+	// Temporary buffer (avoids repeated allocation).
+	buf [4]byte
+
+	// Input bits, in top of b.
+	b uint32
+
+	nb    uint
+	final bool
+}
+
+func (f *decompressor) nextBlock() {
+	for f.nb < 1+2 {
+		if f.err = f.moreBits(); f.err != nil {
+			return
+		}
+	}
+	f.final = f.b&1 == 1
+	f.b >>= 1
+	typ := f.b & 3
+	f.b >>= 2
+	f.nb -= 1 + 2
+	switch typ {
+	case 0:
+		f.dataBlock()
+		if debugDecode {
+			fmt.Println("stored block")
+		}
+	case 1:
+		// compressed, fixed Huffman tables
+		f.hl = &fixedHuffmanDecoder
+		f.hd = nil
+		f.huffmanBlockDecoder()()
+		if debugDecode {
+			fmt.Println("predefinied huffman block")
+		}
+	case 2:
+		// compressed, dynamic Huffman tables
+		if f.err = f.readHuffman(); f.err != nil {
+			break
+		}
+		f.hl = &f.h1
+		f.hd = &f.h2
+		f.huffmanBlockDecoder()()
+		if debugDecode {
+			fmt.Println("dynamic huffman block")
+		}
+	default:
+		// 3 is reserved.
+		if debugDecode {
+			fmt.Println("reserved data block encountered")
+		}
+		f.err = CorruptInputError(f.roffset)
+	}
+}
+
+func (f *decompressor) Read(b []byte) (int, error) {
+	for {
+		if len(f.toRead) > 0 {
+			n := copy(b, f.toRead)
+			f.toRead = f.toRead[n:]
+			if len(f.toRead) == 0 {
+				return n, f.err
+			}
+			return n, nil
+		}
+		if f.err != nil {
+			return 0, f.err
+		}
+		f.step(f)
+		if f.err != nil && len(f.toRead) == 0 {
+			f.toRead = f.dict.readFlush() // Flush what's left in case of error
+		}
+	}
+}
+
+// Support the io.WriteTo interface for io.Copy and friends.
+func (f *decompressor) WriteTo(w io.Writer) (int64, error) {
+	total := int64(0)
+	flushed := false
+	for {
+		if len(f.toRead) > 0 {
+			n, err := w.Write(f.toRead)
+			total += int64(n)
+			if err != nil {
+				f.err = err
+				return total, err
+			}
+			if n != len(f.toRead) {
+				return total, io.ErrShortWrite
+			}
+			f.toRead = f.toRead[:0]
+		}
+		if f.err != nil && flushed {
+			if f.err == io.EOF {
+				return total, nil
+			}
+			return total, f.err
+		}
+		if f.err == nil {
+			f.step(f)
+		}
+		if len(f.toRead) == 0 && f.err != nil && !flushed {
+			f.toRead = f.dict.readFlush() // Flush what's left in case of error
+			flushed = true
+		}
+	}
+}
+
+func (f *decompressor) Close() error {
+	if f.err == io.EOF {
+		return nil
+	}
+	return f.err
+}
+
+// RFC 1951 section 3.2.7.
+// Compression with dynamic Huffman codes
+
+var codeOrder = [...]int{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}
+
+func (f *decompressor) readHuffman() error {
+	// HLIT[5], HDIST[5], HCLEN[4].
+	for f.nb < 5+5+4 {
+		if err := f.moreBits(); err != nil {
+			return err
+		}
+	}
+	nlit := int(f.b&0x1F) + 257
+	if nlit > maxNumLit {
+		if debugDecode {
+			fmt.Println("nlit > maxNumLit", nlit)
+		}
+		return CorruptInputError(f.roffset)
+	}
+	f.b >>= 5
+	ndist := int(f.b&0x1F) + 1
+	if ndist > maxNumDist {
+		if debugDecode {
+			fmt.Println("ndist > maxNumDist", ndist)
+		}
+		return CorruptInputError(f.roffset)
+	}
+	f.b >>= 5
+	nclen := int(f.b&0xF) + 4
+	// numCodes is 19, so nclen is always valid.
+	f.b >>= 4
+	f.nb -= 5 + 5 + 4
+
+	// (HCLEN+4)*3 bits: code lengths in the magic codeOrder order.
+	for i := 0; i < nclen; i++ {
+		for f.nb < 3 {
+			if err := f.moreBits(); err != nil {
+				return err
+			}
+		}
+		f.codebits[codeOrder[i]] = int(f.b & 0x7)
+		f.b >>= 3
+		f.nb -= 3
+	}
+	for i := nclen; i < len(codeOrder); i++ {
+		f.codebits[codeOrder[i]] = 0
+	}
+	if !f.h1.init(f.codebits[0:]) {
+		if debugDecode {
+			fmt.Println("init codebits failed")
+		}
+		return CorruptInputError(f.roffset)
+	}
+
+	// HLIT + 257 code lengths, HDIST + 1 code lengths,
+	// using the code length Huffman code.
+	for i, n := 0, nlit+ndist; i < n; {
+		x, err := f.huffSym(&f.h1)
+		if err != nil {
+			return err
+		}
+		if x < 16 {
+			// Actual length.
+			f.bits[i] = x
+			i++
+			continue
+		}
+		// Repeat previous length or zero.
+		var rep int
+		var nb uint
+		var b int
+		switch x {
+		default:
+			return InternalError("unexpected length code")
+		case 16:
+			rep = 3
+			nb = 2
+			if i == 0 {
+				if debugDecode {
+					fmt.Println("i==0")
+				}
+				return CorruptInputError(f.roffset)
+			}
+			b = f.bits[i-1]
+		case 17:
+			rep = 3
+			nb = 3
+			b = 0
+		case 18:
+			rep = 11
+			nb = 7
+			b = 0
+		}
+		for f.nb < nb {
+			if err := f.moreBits(); err != nil {
+				if debugDecode {
+					fmt.Println("morebits:", err)
+				}
+				return err
+			}
+		}
+		rep += int(f.b & uint32(1<<(nb&regSizeMaskUint32)-1))
+		f.b >>= nb & regSizeMaskUint32
+		f.nb -= nb
+		if i+rep > n {
+			if debugDecode {
+				fmt.Println("i+rep > n", i, rep, n)
+			}
+			return CorruptInputError(f.roffset)
+		}
+		for j := 0; j < rep; j++ {
+			f.bits[i] = b
+			i++
+		}
+	}
+
+	if !f.h1.init(f.bits[0:nlit]) || !f.h2.init(f.bits[nlit:nlit+ndist]) {
+		if debugDecode {
+			fmt.Println("init2 failed")
+		}
+		return CorruptInputError(f.roffset)
+	}
+
+	// As an optimization, we can initialize the maxRead bits to read at a time
+	// for the HLIT tree to the length of the EOB marker since we know that
+	// every block must terminate with one. This preserves the property that
+	// we never read any extra bytes after the end of the DEFLATE stream.
+	if f.h1.maxRead < f.bits[endBlockMarker] {
+		f.h1.maxRead = f.bits[endBlockMarker]
+	}
+	if !f.final {
+		// If not the final block, the smallest block possible is
+		// a predefined table, BTYPE=01, with a single EOB marker.
+		// This will take up 3 + 7 bits.
+		f.h1.maxRead += 10
+	}
+
+	return nil
+}
+
+// Copy a single uncompressed data block from input to output.
+func (f *decompressor) dataBlock() {
+	// Uncompressed.
+	// Discard current half-byte.
+	left := (f.nb) & 7
+	f.nb -= left
+	f.b >>= left
+
+	offBytes := f.nb >> 3
+	// Unfilled values will be overwritten.
+	f.buf[0] = uint8(f.b)
+	f.buf[1] = uint8(f.b >> 8)
+	f.buf[2] = uint8(f.b >> 16)
+	f.buf[3] = uint8(f.b >> 24)
+
+	f.roffset += int64(offBytes)
+	f.nb, f.b = 0, 0
+
+	// Length then ones-complement of length.
+	nr, err := io.ReadFull(f.r, f.buf[offBytes:4])
+	f.roffset += int64(nr)
+	if err != nil {
+		f.err = noEOF(err)
+		return
+	}
+	n := uint16(f.buf[0]) | uint16(f.buf[1])<<8
+	nn := uint16(f.buf[2]) | uint16(f.buf[3])<<8
+	if nn != ^n {
+		if debugDecode {
+			ncomp := ^n
+			fmt.Println("uint16(nn) != uint16(^n)", nn, ncomp)
+		}
+		f.err = CorruptInputError(f.roffset)
+		return
+	}
+
+	if n == 0 {
+		f.toRead = f.dict.readFlush()
+		f.finishBlock()
+		return
+	}
+
+	f.copyLen = int(n)
+	f.copyData()
+}
+
+// copyData copies f.copyLen bytes from the underlying reader into f.hist.
+// It pauses for reads when f.hist is full.
+func (f *decompressor) copyData() {
+	buf := f.dict.writeSlice()
+	if len(buf) > f.copyLen {
+		buf = buf[:f.copyLen]
+	}
+
+	cnt, err := io.ReadFull(f.r, buf)
+	f.roffset += int64(cnt)
+	f.copyLen -= cnt
+	f.dict.writeMark(cnt)
+	if err != nil {
+		f.err = noEOF(err)
+		return
+	}
+
+	if f.dict.availWrite() == 0 || f.copyLen > 0 {
+		f.toRead = f.dict.readFlush()
+		f.step = (*decompressor).copyData
+		return
+	}
+	f.finishBlock()
+}
+
+func (f *decompressor) finishBlock() {
+	if f.final {
+		if f.dict.availRead() > 0 {
+			f.toRead = f.dict.readFlush()
+		}
+		f.err = io.EOF
+	}
+	f.step = (*decompressor).nextBlock
+}
+
+// noEOF returns err, unless err == io.EOF, in which case it returns io.ErrUnexpectedEOF.
+func noEOF(e error) error {
+	if e == io.EOF {
+		return io.ErrUnexpectedEOF
+	}
+	return e
+}
+
+func (f *decompressor) moreBits() error {
+	c, err := f.r.ReadByte()
+	if err != nil {
+		return noEOF(err)
+	}
+	f.roffset++
+	f.b |= uint32(c) << (f.nb & regSizeMaskUint32)
+	f.nb += 8
+	return nil
+}
+
+// Read the next Huffman-encoded symbol from f according to h.
+func (f *decompressor) huffSym(h *huffmanDecoder) (int, error) {
+	// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+	// with single element, huffSym must error on these two edge cases. In both
+	// cases, the chunks slice will be 0 for the invalid sequence, leading it
+	// satisfy the n == 0 check below.
+	n := uint(h.maxRead)
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	nb, b := f.nb, f.b
+	for {
+		for nb < n {
+			c, err := f.r.ReadByte()
+			if err != nil {
+				f.b = b
+				f.nb = nb
+				return 0, noEOF(err)
+			}
+			f.roffset++
+			b |= uint32(c) << (nb & regSizeMaskUint32)
+			nb += 8
+		}
+		chunk := h.chunks[b&(huffmanNumChunks-1)]
+		n = uint(chunk & huffmanCountMask)
+		if n > huffmanChunkBits {
+			chunk = h.links[chunk>>huffmanValueShift][(b>>huffmanChunkBits)&h.linkMask]
+			n = uint(chunk & huffmanCountMask)
+		}
+		if n <= nb {
+			if n == 0 {
+				f.b = b
+				f.nb = nb
+				if debugDecode {
+					fmt.Println("huffsym: n==0")
+				}
+				f.err = CorruptInputError(f.roffset)
+				return 0, f.err
+			}
+			f.b = b >> (n & regSizeMaskUint32)
+			f.nb = nb - n
+			return int(chunk >> huffmanValueShift), nil
+		}
+	}
+}
+
+func makeReader(r io.Reader) Reader {
+	if rr, ok := r.(Reader); ok {
+		return rr
+	}
+	return bufio.NewReader(r)
+}
+
+func fixedHuffmanDecoderInit() {
+	fixedOnce.Do(func() {
+		// These come from the RFC section 3.2.6.
+		var bits [288]int
+		for i := 0; i < 144; i++ {
+			bits[i] = 8
+		}
+		for i := 144; i < 256; i++ {
+			bits[i] = 9
+		}
+		for i := 256; i < 280; i++ {
+			bits[i] = 7
+		}
+		for i := 280; i < 288; i++ {
+			bits[i] = 8
+		}
+		fixedHuffmanDecoder.init(bits[:])
+	})
+}
+
+func (f *decompressor) Reset(r io.Reader, dict []byte) error {
+	*f = decompressor{
+		r:        makeReader(r),
+		bits:     f.bits,
+		codebits: f.codebits,
+		h1:       f.h1,
+		h2:       f.h2,
+		dict:     f.dict,
+		step:     (*decompressor).nextBlock,
+	}
+	f.dict.init(maxMatchOffset, dict)
+	return nil
+}
+
+// NewReader returns a new ReadCloser that can be used
+// to read the uncompressed version of r.
+// If r does not also implement io.ByteReader,
+// the decompressor may read more data than necessary from r.
+// It is the caller's responsibility to call Close on the ReadCloser
+// when finished reading.
+//
+// The ReadCloser returned by NewReader also implements Resetter.
+func NewReader(r io.Reader) io.ReadCloser {
+	fixedHuffmanDecoderInit()
+
+	var f decompressor
+	f.r = makeReader(r)
+	f.bits = new([maxNumLit + maxNumDist]int)
+	f.codebits = new([numCodes]int)
+	f.step = (*decompressor).nextBlock
+	f.dict.init(maxMatchOffset, nil)
+	return &f
+}
+
+// NewReaderDict is like NewReader but initializes the reader
+// with a preset dictionary. The returned Reader behaves as if
+// the uncompressed data stream started with the given dictionary,
+// which has already been read. NewReaderDict is typically used
+// to read data compressed by NewWriterDict.
+//
+// The ReadCloser returned by NewReader also implements Resetter.
+func NewReaderDict(r io.Reader, dict []byte) io.ReadCloser {
+	fixedHuffmanDecoderInit()
+
+	var f decompressor
+	f.r = makeReader(r)
+	f.bits = new([maxNumLit + maxNumDist]int)
+	f.codebits = new([numCodes]int)
+	f.step = (*decompressor).nextBlock
+	f.dict.init(maxMatchOffset, dict)
+	return &f
+}
diff --git a/vendor/github.com/klauspost/compress/flate/inflate_gen.go b/vendor/github.com/klauspost/compress/flate/inflate_gen.go
new file mode 100644
index 0000000000..61342b6b88
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/inflate_gen.go
@@ -0,0 +1,1283 @@
+// Code generated by go generate gen_inflate.go. DO NOT EDIT.
+
+package flate
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"math/bits"
+	"strings"
+)
+
+// Decode a single Huffman block from f.
+// hl and hd are the Huffman states for the lit/length values
+// and the distance values, respectively. If hd == nil, using the
+// fixed distance encoding associated with fixed Huffman blocks.
+func (f *decompressor) huffmanBytesBuffer() {
+	const (
+		stateInit = iota // Zero value must be stateInit
+		stateDict
+	)
+	fr := f.r.(*bytes.Buffer)
+
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	fnb, fb, dict := f.nb, f.b, &f.dict
+
+	switch f.stepState {
+	case stateInit:
+		goto readLiteral
+	case stateDict:
+		goto copyHistory
+	}
+
+readLiteral:
+	// Read literal and/or (length, distance) according to RFC section 3.2.3.
+	{
+		var v int
+		{
+			// Inlined v, err := f.huffSym(f.hl)
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hl.maxRead)
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hl.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hl.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hl.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					v = int(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		var length int
+		switch {
+		case v < 256:
+			dict.writeByte(byte(v))
+			if dict.availWrite() == 0 {
+				f.toRead = dict.readFlush()
+				f.step = (*decompressor).huffmanBytesBuffer
+				f.stepState = stateInit
+				f.b, f.nb = fb, fnb
+				return
+			}
+			goto readLiteral
+		case v == 256:
+			f.b, f.nb = fb, fnb
+			f.finishBlock()
+			return
+		// otherwise, reference to older data
+		case v < 265:
+			length = v - (257 - 3)
+		case v < maxNumLit:
+			val := decCodeToLen[(v - 257)]
+			length = int(val.length) + 3
+			n := uint(val.extra)
+			for fnb < n {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits n>0:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			length += int(fb & bitMask32[n])
+			fb >>= n & regSizeMaskUint32
+			fnb -= n
+		default:
+			if debugDecode {
+				fmt.Println(v, ">= maxNumLit")
+			}
+			f.err = CorruptInputError(f.roffset)
+			f.b, f.nb = fb, fnb
+			return
+		}
+
+		var dist uint32
+		if f.hd == nil {
+			for fnb < 5 {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<5:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			dist = uint32(bits.Reverse8(uint8(fb & 0x1F << 3)))
+			fb >>= 5
+			fnb -= 5
+		} else {
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hd.maxRead)
+			// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+			// but is smart enough to keep local variables in registers, so use nb and b,
+			// inline call to moreBits and reassign b,nb back to f on return.
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hd.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hd.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hd.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					dist = uint32(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		switch {
+		case dist < 4:
+			dist++
+		case dist < maxNumDist:
+			nb := uint(dist-2) >> 1
+			// have 1 bit in bottom of dist, need nb more.
+			extra := (dist & 1) << (nb & regSizeMaskUint32)
+			for fnb < nb {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<nb:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			extra |= fb & bitMask32[nb]
+			fb >>= nb & regSizeMaskUint32
+			fnb -= nb
+			dist = 1<<((nb+1)&regSizeMaskUint32) + 1 + extra
+			// slower: dist = bitMask32[nb+1] + 2 + extra
+		default:
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist too big:", dist, maxNumDist)
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		// No check on length; encoding can be prescient.
+		if dist > uint32(dict.histSize()) {
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist > dict.histSize():", dist, dict.histSize())
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		f.copyLen, f.copyDist = length, int(dist)
+		goto copyHistory
+	}
+
+copyHistory:
+	// Perform a backwards copy according to RFC section 3.2.3.
+	{
+		cnt := dict.tryWriteCopy(f.copyDist, f.copyLen)
+		if cnt == 0 {
+			cnt = dict.writeCopy(f.copyDist, f.copyLen)
+		}
+		f.copyLen -= cnt
+
+		if dict.availWrite() == 0 || f.copyLen > 0 {
+			f.toRead = dict.readFlush()
+			f.step = (*decompressor).huffmanBytesBuffer // We need to continue this work
+			f.stepState = stateDict
+			f.b, f.nb = fb, fnb
+			return
+		}
+		goto readLiteral
+	}
+	// Not reached
+}
+
+// Decode a single Huffman block from f.
+// hl and hd are the Huffman states for the lit/length values
+// and the distance values, respectively. If hd == nil, using the
+// fixed distance encoding associated with fixed Huffman blocks.
+func (f *decompressor) huffmanBytesReader() {
+	const (
+		stateInit = iota // Zero value must be stateInit
+		stateDict
+	)
+	fr := f.r.(*bytes.Reader)
+
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	fnb, fb, dict := f.nb, f.b, &f.dict
+
+	switch f.stepState {
+	case stateInit:
+		goto readLiteral
+	case stateDict:
+		goto copyHistory
+	}
+
+readLiteral:
+	// Read literal and/or (length, distance) according to RFC section 3.2.3.
+	{
+		var v int
+		{
+			// Inlined v, err := f.huffSym(f.hl)
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hl.maxRead)
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hl.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hl.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hl.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					v = int(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		var length int
+		switch {
+		case v < 256:
+			dict.writeByte(byte(v))
+			if dict.availWrite() == 0 {
+				f.toRead = dict.readFlush()
+				f.step = (*decompressor).huffmanBytesReader
+				f.stepState = stateInit
+				f.b, f.nb = fb, fnb
+				return
+			}
+			goto readLiteral
+		case v == 256:
+			f.b, f.nb = fb, fnb
+			f.finishBlock()
+			return
+		// otherwise, reference to older data
+		case v < 265:
+			length = v - (257 - 3)
+		case v < maxNumLit:
+			val := decCodeToLen[(v - 257)]
+			length = int(val.length) + 3
+			n := uint(val.extra)
+			for fnb < n {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits n>0:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			length += int(fb & bitMask32[n])
+			fb >>= n & regSizeMaskUint32
+			fnb -= n
+		default:
+			if debugDecode {
+				fmt.Println(v, ">= maxNumLit")
+			}
+			f.err = CorruptInputError(f.roffset)
+			f.b, f.nb = fb, fnb
+			return
+		}
+
+		var dist uint32
+		if f.hd == nil {
+			for fnb < 5 {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<5:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			dist = uint32(bits.Reverse8(uint8(fb & 0x1F << 3)))
+			fb >>= 5
+			fnb -= 5
+		} else {
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hd.maxRead)
+			// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+			// but is smart enough to keep local variables in registers, so use nb and b,
+			// inline call to moreBits and reassign b,nb back to f on return.
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hd.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hd.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hd.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					dist = uint32(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		switch {
+		case dist < 4:
+			dist++
+		case dist < maxNumDist:
+			nb := uint(dist-2) >> 1
+			// have 1 bit in bottom of dist, need nb more.
+			extra := (dist & 1) << (nb & regSizeMaskUint32)
+			for fnb < nb {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<nb:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			extra |= fb & bitMask32[nb]
+			fb >>= nb & regSizeMaskUint32
+			fnb -= nb
+			dist = 1<<((nb+1)&regSizeMaskUint32) + 1 + extra
+			// slower: dist = bitMask32[nb+1] + 2 + extra
+		default:
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist too big:", dist, maxNumDist)
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		// No check on length; encoding can be prescient.
+		if dist > uint32(dict.histSize()) {
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist > dict.histSize():", dist, dict.histSize())
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		f.copyLen, f.copyDist = length, int(dist)
+		goto copyHistory
+	}
+
+copyHistory:
+	// Perform a backwards copy according to RFC section 3.2.3.
+	{
+		cnt := dict.tryWriteCopy(f.copyDist, f.copyLen)
+		if cnt == 0 {
+			cnt = dict.writeCopy(f.copyDist, f.copyLen)
+		}
+		f.copyLen -= cnt
+
+		if dict.availWrite() == 0 || f.copyLen > 0 {
+			f.toRead = dict.readFlush()
+			f.step = (*decompressor).huffmanBytesReader // We need to continue this work
+			f.stepState = stateDict
+			f.b, f.nb = fb, fnb
+			return
+		}
+		goto readLiteral
+	}
+	// Not reached
+}
+
+// Decode a single Huffman block from f.
+// hl and hd are the Huffman states for the lit/length values
+// and the distance values, respectively. If hd == nil, using the
+// fixed distance encoding associated with fixed Huffman blocks.
+func (f *decompressor) huffmanBufioReader() {
+	const (
+		stateInit = iota // Zero value must be stateInit
+		stateDict
+	)
+	fr := f.r.(*bufio.Reader)
+
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	fnb, fb, dict := f.nb, f.b, &f.dict
+
+	switch f.stepState {
+	case stateInit:
+		goto readLiteral
+	case stateDict:
+		goto copyHistory
+	}
+
+readLiteral:
+	// Read literal and/or (length, distance) according to RFC section 3.2.3.
+	{
+		var v int
+		{
+			// Inlined v, err := f.huffSym(f.hl)
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hl.maxRead)
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hl.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hl.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hl.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					v = int(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		var length int
+		switch {
+		case v < 256:
+			dict.writeByte(byte(v))
+			if dict.availWrite() == 0 {
+				f.toRead = dict.readFlush()
+				f.step = (*decompressor).huffmanBufioReader
+				f.stepState = stateInit
+				f.b, f.nb = fb, fnb
+				return
+			}
+			goto readLiteral
+		case v == 256:
+			f.b, f.nb = fb, fnb
+			f.finishBlock()
+			return
+		// otherwise, reference to older data
+		case v < 265:
+			length = v - (257 - 3)
+		case v < maxNumLit:
+			val := decCodeToLen[(v - 257)]
+			length = int(val.length) + 3
+			n := uint(val.extra)
+			for fnb < n {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits n>0:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			length += int(fb & bitMask32[n])
+			fb >>= n & regSizeMaskUint32
+			fnb -= n
+		default:
+			if debugDecode {
+				fmt.Println(v, ">= maxNumLit")
+			}
+			f.err = CorruptInputError(f.roffset)
+			f.b, f.nb = fb, fnb
+			return
+		}
+
+		var dist uint32
+		if f.hd == nil {
+			for fnb < 5 {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<5:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			dist = uint32(bits.Reverse8(uint8(fb & 0x1F << 3)))
+			fb >>= 5
+			fnb -= 5
+		} else {
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hd.maxRead)
+			// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+			// but is smart enough to keep local variables in registers, so use nb and b,
+			// inline call to moreBits and reassign b,nb back to f on return.
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hd.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hd.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hd.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					dist = uint32(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		switch {
+		case dist < 4:
+			dist++
+		case dist < maxNumDist:
+			nb := uint(dist-2) >> 1
+			// have 1 bit in bottom of dist, need nb more.
+			extra := (dist & 1) << (nb & regSizeMaskUint32)
+			for fnb < nb {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<nb:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			extra |= fb & bitMask32[nb]
+			fb >>= nb & regSizeMaskUint32
+			fnb -= nb
+			dist = 1<<((nb+1)&regSizeMaskUint32) + 1 + extra
+			// slower: dist = bitMask32[nb+1] + 2 + extra
+		default:
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist too big:", dist, maxNumDist)
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		// No check on length; encoding can be prescient.
+		if dist > uint32(dict.histSize()) {
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist > dict.histSize():", dist, dict.histSize())
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		f.copyLen, f.copyDist = length, int(dist)
+		goto copyHistory
+	}
+
+copyHistory:
+	// Perform a backwards copy according to RFC section 3.2.3.
+	{
+		cnt := dict.tryWriteCopy(f.copyDist, f.copyLen)
+		if cnt == 0 {
+			cnt = dict.writeCopy(f.copyDist, f.copyLen)
+		}
+		f.copyLen -= cnt
+
+		if dict.availWrite() == 0 || f.copyLen > 0 {
+			f.toRead = dict.readFlush()
+			f.step = (*decompressor).huffmanBufioReader // We need to continue this work
+			f.stepState = stateDict
+			f.b, f.nb = fb, fnb
+			return
+		}
+		goto readLiteral
+	}
+	// Not reached
+}
+
+// Decode a single Huffman block from f.
+// hl and hd are the Huffman states for the lit/length values
+// and the distance values, respectively. If hd == nil, using the
+// fixed distance encoding associated with fixed Huffman blocks.
+func (f *decompressor) huffmanStringsReader() {
+	const (
+		stateInit = iota // Zero value must be stateInit
+		stateDict
+	)
+	fr := f.r.(*strings.Reader)
+
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	fnb, fb, dict := f.nb, f.b, &f.dict
+
+	switch f.stepState {
+	case stateInit:
+		goto readLiteral
+	case stateDict:
+		goto copyHistory
+	}
+
+readLiteral:
+	// Read literal and/or (length, distance) according to RFC section 3.2.3.
+	{
+		var v int
+		{
+			// Inlined v, err := f.huffSym(f.hl)
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hl.maxRead)
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hl.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hl.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hl.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					v = int(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		var length int
+		switch {
+		case v < 256:
+			dict.writeByte(byte(v))
+			if dict.availWrite() == 0 {
+				f.toRead = dict.readFlush()
+				f.step = (*decompressor).huffmanStringsReader
+				f.stepState = stateInit
+				f.b, f.nb = fb, fnb
+				return
+			}
+			goto readLiteral
+		case v == 256:
+			f.b, f.nb = fb, fnb
+			f.finishBlock()
+			return
+		// otherwise, reference to older data
+		case v < 265:
+			length = v - (257 - 3)
+		case v < maxNumLit:
+			val := decCodeToLen[(v - 257)]
+			length = int(val.length) + 3
+			n := uint(val.extra)
+			for fnb < n {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits n>0:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			length += int(fb & bitMask32[n])
+			fb >>= n & regSizeMaskUint32
+			fnb -= n
+		default:
+			if debugDecode {
+				fmt.Println(v, ">= maxNumLit")
+			}
+			f.err = CorruptInputError(f.roffset)
+			f.b, f.nb = fb, fnb
+			return
+		}
+
+		var dist uint32
+		if f.hd == nil {
+			for fnb < 5 {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<5:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			dist = uint32(bits.Reverse8(uint8(fb & 0x1F << 3)))
+			fb >>= 5
+			fnb -= 5
+		} else {
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hd.maxRead)
+			// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+			// but is smart enough to keep local variables in registers, so use nb and b,
+			// inline call to moreBits and reassign b,nb back to f on return.
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hd.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hd.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hd.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					dist = uint32(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		switch {
+		case dist < 4:
+			dist++
+		case dist < maxNumDist:
+			nb := uint(dist-2) >> 1
+			// have 1 bit in bottom of dist, need nb more.
+			extra := (dist & 1) << (nb & regSizeMaskUint32)
+			for fnb < nb {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<nb:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			extra |= fb & bitMask32[nb]
+			fb >>= nb & regSizeMaskUint32
+			fnb -= nb
+			dist = 1<<((nb+1)&regSizeMaskUint32) + 1 + extra
+			// slower: dist = bitMask32[nb+1] + 2 + extra
+		default:
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist too big:", dist, maxNumDist)
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		// No check on length; encoding can be prescient.
+		if dist > uint32(dict.histSize()) {
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist > dict.histSize():", dist, dict.histSize())
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		f.copyLen, f.copyDist = length, int(dist)
+		goto copyHistory
+	}
+
+copyHistory:
+	// Perform a backwards copy according to RFC section 3.2.3.
+	{
+		cnt := dict.tryWriteCopy(f.copyDist, f.copyLen)
+		if cnt == 0 {
+			cnt = dict.writeCopy(f.copyDist, f.copyLen)
+		}
+		f.copyLen -= cnt
+
+		if dict.availWrite() == 0 || f.copyLen > 0 {
+			f.toRead = dict.readFlush()
+			f.step = (*decompressor).huffmanStringsReader // We need to continue this work
+			f.stepState = stateDict
+			f.b, f.nb = fb, fnb
+			return
+		}
+		goto readLiteral
+	}
+	// Not reached
+}
+
+// Decode a single Huffman block from f.
+// hl and hd are the Huffman states for the lit/length values
+// and the distance values, respectively. If hd == nil, using the
+// fixed distance encoding associated with fixed Huffman blocks.
+func (f *decompressor) huffmanGenericReader() {
+	const (
+		stateInit = iota // Zero value must be stateInit
+		stateDict
+	)
+	fr := f.r.(Reader)
+
+	// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+	// but is smart enough to keep local variables in registers, so use nb and b,
+	// inline call to moreBits and reassign b,nb back to f on return.
+	fnb, fb, dict := f.nb, f.b, &f.dict
+
+	switch f.stepState {
+	case stateInit:
+		goto readLiteral
+	case stateDict:
+		goto copyHistory
+	}
+
+readLiteral:
+	// Read literal and/or (length, distance) according to RFC section 3.2.3.
+	{
+		var v int
+		{
+			// Inlined v, err := f.huffSym(f.hl)
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hl.maxRead)
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hl.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hl.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hl.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					v = int(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		var length int
+		switch {
+		case v < 256:
+			dict.writeByte(byte(v))
+			if dict.availWrite() == 0 {
+				f.toRead = dict.readFlush()
+				f.step = (*decompressor).huffmanGenericReader
+				f.stepState = stateInit
+				f.b, f.nb = fb, fnb
+				return
+			}
+			goto readLiteral
+		case v == 256:
+			f.b, f.nb = fb, fnb
+			f.finishBlock()
+			return
+		// otherwise, reference to older data
+		case v < 265:
+			length = v - (257 - 3)
+		case v < maxNumLit:
+			val := decCodeToLen[(v - 257)]
+			length = int(val.length) + 3
+			n := uint(val.extra)
+			for fnb < n {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits n>0:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			length += int(fb & bitMask32[n])
+			fb >>= n & regSizeMaskUint32
+			fnb -= n
+		default:
+			if debugDecode {
+				fmt.Println(v, ">= maxNumLit")
+			}
+			f.err = CorruptInputError(f.roffset)
+			f.b, f.nb = fb, fnb
+			return
+		}
+
+		var dist uint32
+		if f.hd == nil {
+			for fnb < 5 {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<5:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			dist = uint32(bits.Reverse8(uint8(fb & 0x1F << 3)))
+			fb >>= 5
+			fnb -= 5
+		} else {
+			// Since a huffmanDecoder can be empty or be composed of a degenerate tree
+			// with single element, huffSym must error on these two edge cases. In both
+			// cases, the chunks slice will be 0 for the invalid sequence, leading it
+			// satisfy the n == 0 check below.
+			n := uint(f.hd.maxRead)
+			// Optimization. Compiler isn't smart enough to keep f.b,f.nb in registers,
+			// but is smart enough to keep local variables in registers, so use nb and b,
+			// inline call to moreBits and reassign b,nb back to f on return.
+			for {
+				for fnb < n {
+					c, err := fr.ReadByte()
+					if err != nil {
+						f.b, f.nb = fb, fnb
+						f.err = noEOF(err)
+						return
+					}
+					f.roffset++
+					fb |= uint32(c) << (fnb & regSizeMaskUint32)
+					fnb += 8
+				}
+				chunk := f.hd.chunks[fb&(huffmanNumChunks-1)]
+				n = uint(chunk & huffmanCountMask)
+				if n > huffmanChunkBits {
+					chunk = f.hd.links[chunk>>huffmanValueShift][(fb>>huffmanChunkBits)&f.hd.linkMask]
+					n = uint(chunk & huffmanCountMask)
+				}
+				if n <= fnb {
+					if n == 0 {
+						f.b, f.nb = fb, fnb
+						if debugDecode {
+							fmt.Println("huffsym: n==0")
+						}
+						f.err = CorruptInputError(f.roffset)
+						return
+					}
+					fb = fb >> (n & regSizeMaskUint32)
+					fnb = fnb - n
+					dist = uint32(chunk >> huffmanValueShift)
+					break
+				}
+			}
+		}
+
+		switch {
+		case dist < 4:
+			dist++
+		case dist < maxNumDist:
+			nb := uint(dist-2) >> 1
+			// have 1 bit in bottom of dist, need nb more.
+			extra := (dist & 1) << (nb & regSizeMaskUint32)
+			for fnb < nb {
+				c, err := fr.ReadByte()
+				if err != nil {
+					f.b, f.nb = fb, fnb
+					if debugDecode {
+						fmt.Println("morebits f.nb<nb:", err)
+					}
+					f.err = err
+					return
+				}
+				f.roffset++
+				fb |= uint32(c) << (fnb & regSizeMaskUint32)
+				fnb += 8
+			}
+			extra |= fb & bitMask32[nb]
+			fb >>= nb & regSizeMaskUint32
+			fnb -= nb
+			dist = 1<<((nb+1)&regSizeMaskUint32) + 1 + extra
+			// slower: dist = bitMask32[nb+1] + 2 + extra
+		default:
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist too big:", dist, maxNumDist)
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		// No check on length; encoding can be prescient.
+		if dist > uint32(dict.histSize()) {
+			f.b, f.nb = fb, fnb
+			if debugDecode {
+				fmt.Println("dist > dict.histSize():", dist, dict.histSize())
+			}
+			f.err = CorruptInputError(f.roffset)
+			return
+		}
+
+		f.copyLen, f.copyDist = length, int(dist)
+		goto copyHistory
+	}
+
+copyHistory:
+	// Perform a backwards copy according to RFC section 3.2.3.
+	{
+		cnt := dict.tryWriteCopy(f.copyDist, f.copyLen)
+		if cnt == 0 {
+			cnt = dict.writeCopy(f.copyDist, f.copyLen)
+		}
+		f.copyLen -= cnt
+
+		if dict.availWrite() == 0 || f.copyLen > 0 {
+			f.toRead = dict.readFlush()
+			f.step = (*decompressor).huffmanGenericReader // We need to continue this work
+			f.stepState = stateDict
+			f.b, f.nb = fb, fnb
+			return
+		}
+		goto readLiteral
+	}
+	// Not reached
+}
+
+func (f *decompressor) huffmanBlockDecoder() func() {
+	switch f.r.(type) {
+	case *bytes.Buffer:
+		return f.huffmanBytesBuffer
+	case *bytes.Reader:
+		return f.huffmanBytesReader
+	case *bufio.Reader:
+		return f.huffmanBufioReader
+	case *strings.Reader:
+		return f.huffmanStringsReader
+	case Reader:
+		return f.huffmanGenericReader
+	default:
+		return f.huffmanGenericReader
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/inflate_test.go b/vendor/github.com/klauspost/compress/flate/inflate_test.go
new file mode 100644
index 0000000000..aac29c6d2b
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/inflate_test.go
@@ -0,0 +1,281 @@
+// Copyright 2014 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 flate
+
+import (
+	"bytes"
+	"crypto/rand"
+	"io"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestReset(t *testing.T) {
+	ss := []string{
+		"lorem ipsum izzle fo rizzle",
+		"the quick brown fox jumped over",
+	}
+
+	deflated := make([]bytes.Buffer, 2)
+	for i, s := range ss {
+		w, _ := NewWriter(&deflated[i], 1)
+		w.Write([]byte(s))
+		w.Close()
+	}
+
+	inflated := make([]bytes.Buffer, 2)
+
+	f := NewReader(&deflated[0])
+	io.Copy(&inflated[0], f)
+	f.(Resetter).Reset(&deflated[1], nil)
+	io.Copy(&inflated[1], f)
+	f.Close()
+
+	for i, s := range ss {
+		if s != inflated[i].String() {
+			t.Errorf("inflated[%d]:\ngot  %q\nwant %q", i, inflated[i], s)
+		}
+	}
+}
+
+func TestReaderTruncated(t *testing.T) {
+	vectors := []struct{ input, output string }{
+		{"\x00", ""},
+		{"\x00\f", ""},
+		{"\x00\f\x00", ""},
+		{"\x00\f\x00\xf3\xff", ""},
+		{"\x00\f\x00\xf3\xffhello", "hello"},
+		{"\x00\f\x00\xf3\xffhello, world", "hello, world"},
+		{"\x02", ""},
+		{"\xf2H\xcd", "He"},
+		{"\xf2H͙0a\u0084\t", "Hel\x90\x90\x90\x90\x90"},
+		{"\xf2H͙0a\u0084\t\x00", "Hel\x90\x90\x90\x90\x90"},
+	}
+
+	for i, v := range vectors {
+		r := strings.NewReader(v.input)
+		zr := NewReader(r)
+		b, err := io.ReadAll(zr)
+		if err != io.ErrUnexpectedEOF {
+			t.Errorf("test %d, error mismatch: got %v, want io.ErrUnexpectedEOF", i, err)
+		}
+		if string(b) != v.output {
+			t.Errorf("test %d, output mismatch: got %q, want %q", i, b, v.output)
+		}
+	}
+}
+
+func TestResetDict(t *testing.T) {
+	dict := []byte("the lorem fox")
+	ss := []string{
+		"lorem ipsum izzle fo rizzle",
+		"the quick brown fox jumped over",
+	}
+
+	deflated := make([]bytes.Buffer, len(ss))
+	for i, s := range ss {
+		w, _ := NewWriterDict(&deflated[i], DefaultCompression, dict)
+		w.Write([]byte(s))
+		w.Close()
+	}
+
+	inflated := make([]bytes.Buffer, len(ss))
+
+	f := NewReader(nil)
+	for i := range inflated {
+		f.(Resetter).Reset(&deflated[i], dict)
+		io.Copy(&inflated[i], f)
+	}
+	f.Close()
+
+	for i, s := range ss {
+		if s != inflated[i].String() {
+			t.Errorf("inflated[%d]:\ngot  %q\nwant %q", i, inflated[i], s)
+		}
+	}
+}
+
+// Tests ported from zlib/test/infcover.c
+type infTest struct {
+	hex string
+	id  string
+	n   int
+}
+
+var infTests = []infTest{
+	{"0 0 0 0 0", "invalid stored block lengths", 1},
+	{"3 0", "fixed", 0},
+	{"6", "invalid block type", 1},
+	{"1 1 0 fe ff 0", "stored", 0},
+	{"fc 0 0", "too many length or distance symbols", 1},
+	{"4 0 fe ff", "invalid code lengths set", 1},
+	{"4 0 24 49 0", "invalid bit length repeat", 1},
+	{"4 0 24 e9 ff ff", "invalid bit length repeat", 1},
+	{"4 0 24 e9 ff 6d", "invalid code -- missing end-of-block", 1},
+	{"4 80 49 92 24 49 92 24 71 ff ff 93 11 0", "invalid literal/lengths set", 1},
+	{"4 80 49 92 24 49 92 24 f b4 ff ff c3 84", "invalid distances set", 1},
+	{"4 c0 81 8 0 0 0 0 20 7f eb b 0 0", "invalid literal/length code", 1},
+	{"2 7e ff ff", "invalid distance code", 1},
+	{"c c0 81 0 0 0 0 0 90 ff 6b 4 0", "invalid distance too far back", 1},
+
+	// also trailer mismatch just in inflate()
+	{"1f 8b 8 0 0 0 0 0 0 0 3 0 0 0 0 1", "incorrect data check", -1},
+	{"1f 8b 8 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 1", "incorrect length check", -1},
+	{"5 c0 21 d 0 0 0 80 b0 fe 6d 2f 91 6c", "pull 17", 0},
+	{"5 e0 81 91 24 cb b2 2c 49 e2 f 2e 8b 9a 47 56 9f fb fe ec d2 ff 1f", "long code", 0},
+	{"ed c0 1 1 0 0 0 40 20 ff 57 1b 42 2c 4f", "length extra", 0},
+	{"ed cf c1 b1 2c 47 10 c4 30 fa 6f 35 1d 1 82 59 3d fb be 2e 2a fc f c", "long distance and extra", 0},
+	{"ed c0 81 0 0 0 0 80 a0 fd a9 17 a9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6", "window end", 0},
+}
+
+func TestInflate(t *testing.T) {
+	for _, test := range infTests {
+		hex := strings.Split(test.hex, " ")
+		data := make([]byte, len(hex))
+		for i, h := range hex {
+			b, _ := strconv.ParseInt(h, 16, 32)
+			data[i] = byte(b)
+		}
+		buf := bytes.NewReader(data)
+		r := NewReader(buf)
+
+		_, err := io.Copy(io.Discard, r)
+		if (test.n == 0 && err == nil) || (test.n != 0 && err != nil) {
+			t.Logf("%q: OK:", test.id)
+			t.Logf(" - got %v", err)
+			continue
+		}
+
+		if test.n == 0 && err != nil {
+			t.Errorf("%q: Expected no error, but got %v", test.id, err)
+			continue
+		}
+
+		if test.n != 0 && err == nil {
+			t.Errorf("%q:Expected an error, but got none", test.id)
+			continue
+		}
+		t.Fatal(test.n, err)
+	}
+
+	for _, test := range infOutTests {
+		hex := strings.Split(test.hex, " ")
+		data := make([]byte, len(hex))
+		for i, h := range hex {
+			b, _ := strconv.ParseInt(h, 16, 32)
+			data[i] = byte(b)
+		}
+		buf := bytes.NewReader(data)
+		r := NewReader(buf)
+
+		_, err := io.Copy(io.Discard, r)
+		if test.err == (err != nil) {
+			t.Logf("%q: OK:", test.id)
+			t.Logf(" - got %v", err)
+			continue
+		}
+
+		if test.err == false && err != nil {
+			t.Errorf("%q: Expected no error, but got %v", test.id, err)
+			continue
+		}
+
+		if test.err && err == nil {
+			t.Errorf("%q: Expected an error, but got none", test.id)
+			continue
+		}
+		t.Fatal(test.err, err)
+	}
+
+}
+
+// Tests ported from zlib/test/infcover.c
+// Since zlib inflate is push (writer) instead of pull (reader)
+// some of the window size tests have been removed, since they
+// are irrelevant.
+type infOutTest struct {
+	hex    string
+	id     string
+	step   int
+	win    int
+	length int
+	err    bool
+}
+
+var infOutTests = []infOutTest{
+	{"2 8 20 80 0 3 0", "inflate_fast TYPE return", 0, -15, 258, false},
+	{"63 18 5 40 c 0", "window wrap", 3, -8, 300, false},
+	{"e5 e0 81 ad 6d cb b2 2c c9 01 1e 59 63 ae 7d ee fb 4d fd b5 35 41 68 ff 7f 0f 0 0 0", "fast length extra bits", 0, -8, 258, true},
+	{"25 fd 81 b5 6d 59 b6 6a 49 ea af 35 6 34 eb 8c b9 f6 b9 1e ef 67 49 50 fe ff ff 3f 0 0", "fast distance extra bits", 0, -8, 258, true},
+	{"3 7e 0 0 0 0 0", "fast invalid distance code", 0, -8, 258, true},
+	{"1b 7 0 0 0 0 0", "fast invalid literal/length code", 0, -8, 258, true},
+	{"d c7 1 ae eb 38 c 4 41 a0 87 72 de df fb 1f b8 36 b1 38 5d ff ff 0", "fast 2nd level codes and too far back", 0, -8, 258, true},
+	{"63 18 5 8c 10 8 0 0 0 0", "very common case", 0, -8, 259, false},
+	{"63 60 60 18 c9 0 8 18 18 18 26 c0 28 0 29 0 0 0", "contiguous and wrap around window", 6, -8, 259, false},
+	{"63 0 3 0 0 0 0 0", "copy direct from output", 0, -8, 259, false},
+	{"1f 8b 0 0", "bad gzip method", 0, 31, 0, true},
+	{"1f 8b 8 80", "bad gzip flags", 0, 31, 0, true},
+	{"77 85", "bad zlib method", 0, 15, 0, true},
+	{"78 9c", "bad zlib window size", 0, 8, 0, true},
+	{"1f 8b 8 1e 0 0 0 0 0 0 1 0 0 0 0 0 0", "bad header crc", 0, 47, 1, true},
+	{"1f 8b 8 2 0 0 0 0 0 0 1d 26 3 0 0 0 0 0 0 0 0 0", "check gzip length", 0, 47, 0, true},
+	{"78 90", "bad zlib header check", 0, 47, 0, true},
+	{"8 b8 0 0 0 1", "need dictionary", 0, 8, 0, true},
+	{"63 18 68 30 d0 0 0", "force split window update", 4, -8, 259, false},
+	{"3 0", "use fixed blocks", 0, -15, 1, false},
+	{"", "bad window size", 0, 1, 0, true},
+}
+
+func TestWriteTo(t *testing.T) {
+	input := make([]byte, 100000)
+	n, err := rand.Read(input)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != len(input) {
+		t.Fatal("did not fill buffer")
+	}
+	compressed := &bytes.Buffer{}
+	w, err := NewWriter(compressed, -2)
+	if err != nil {
+		t.Fatal(err)
+	}
+	n, err = w.Write(input)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if n != len(input) {
+		t.Fatal("did not fill buffer")
+	}
+	w.Close()
+	buf := compressed.Bytes()
+
+	dec := NewReader(bytes.NewBuffer(buf))
+	// ReadAll does not use WriteTo, but we wrap it in a NopCloser to be sure.
+	readall, err := io.ReadAll(io.NopCloser(dec))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(readall) != len(input) {
+		t.Fatal("did not decompress everything")
+	}
+
+	dec = NewReader(bytes.NewBuffer(buf))
+	wtbuf := &bytes.Buffer{}
+	written, err := dec.(io.WriterTo).WriteTo(wtbuf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if written != int64(len(input)) {
+		t.Error("Returned length did not match, expected", len(input), "got", written)
+	}
+	if wtbuf.Len() != len(input) {
+		t.Error("Actual Length did not match, expected", len(input), "got", wtbuf.Len())
+	}
+	if !bytes.Equal(wtbuf.Bytes(), input) {
+		t.Fatal("output did not match input")
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level1.go b/vendor/github.com/klauspost/compress/flate/level1.go
new file mode 100644
index 0000000000..703b9a89aa
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level1.go
@@ -0,0 +1,241 @@
+package flate
+
+import (
+	"encoding/binary"
+	"fmt"
+	"math/bits"
+)
+
+// fastGen maintains the table for matches,
+// and the previous byte block for level 2.
+// This is the generic implementation.
+type fastEncL1 struct {
+	fastGen
+	table [tableSize]tableEntry
+}
+
+// EncodeL1 uses a similar algorithm to level 1
+func (e *fastEncL1) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		hashBytes              = 5
+	)
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntry{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.table[i].offset = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+
+	for {
+		const skipLog = 5
+		const doEvery = 2
+
+		nextS := s
+		var candidate tableEntry
+		for {
+			nextHash := hashLen(cv, tableBits, hashBytes)
+			candidate = e.table[nextHash]
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+
+			now := load6432(src, nextS)
+			e.table[nextHash] = tableEntry{offset: s + e.cur}
+			nextHash = hashLen(now, tableBits, hashBytes)
+
+			offset := s - (candidate.offset - e.cur)
+			if offset < maxMatchOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+				e.table[nextHash] = tableEntry{offset: nextS + e.cur}
+				break
+			}
+
+			// Do one right away...
+			cv = now
+			s = nextS
+			nextS++
+			candidate = e.table[nextHash]
+			now >>= 8
+			e.table[nextHash] = tableEntry{offset: s + e.cur}
+
+			offset = s - (candidate.offset - e.cur)
+			if offset < maxMatchOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+				e.table[nextHash] = tableEntry{offset: nextS + e.cur}
+				break
+			}
+			cv = now
+			s = nextS
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+		for {
+			// Invariant: we have a 4-byte match at s, and no need to emit any
+			// literal bytes prior to s.
+
+			// Extend the 4-byte match as long as possible.
+			t := candidate.offset - e.cur
+			var l = int32(4)
+			if false {
+				l = e.matchlenLong(s+4, t+4, src) + 4
+			} else {
+				// inlined:
+				a := src[s+4:]
+				b := src[t+4:]
+				for len(a) >= 8 {
+					if diff := binary.LittleEndian.Uint64(a) ^ binary.LittleEndian.Uint64(b); diff != 0 {
+						l += int32(bits.TrailingZeros64(diff) >> 3)
+						break
+					}
+					l += 8
+					a = a[8:]
+					b = b[8:]
+				}
+				if len(a) < 8 {
+					b = b[:len(a)]
+					for i := range a {
+						if a[i] != b[i] {
+							break
+						}
+						l++
+					}
+				}
+			}
+
+			// Extend backwards
+			for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+				s--
+				t--
+				l++
+			}
+			if nextEmit < s {
+				if false {
+					emitLiteral(dst, src[nextEmit:s])
+				} else {
+					for _, v := range src[nextEmit:s] {
+						dst.tokens[dst.n] = token(v)
+						dst.litHist[v]++
+						dst.n++
+					}
+				}
+			}
+
+			// Save the match found
+			if false {
+				dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+			} else {
+				// Inlined...
+				xoffset := uint32(s - t - baseMatchOffset)
+				xlength := l
+				oc := offsetCode(xoffset)
+				xoffset |= oc << 16
+				for xlength > 0 {
+					xl := xlength
+					if xl > 258 {
+						if xl > 258+baseMatchLength {
+							xl = 258
+						} else {
+							xl = 258 - baseMatchLength
+						}
+					}
+					xlength -= xl
+					xl -= baseMatchLength
+					dst.extraHist[lengthCodes1[uint8(xl)]]++
+					dst.offHist[oc]++
+					dst.tokens[dst.n] = token(matchType | uint32(xl)<<lengthShift | xoffset)
+					dst.n++
+				}
+			}
+			s += l
+			nextEmit = s
+			if nextS >= s {
+				s = nextS + 1
+			}
+			if s >= sLimit {
+				// Index first pair after match end.
+				if int(s+l+8) < len(src) {
+					cv := load6432(src, s)
+					e.table[hashLen(cv, tableBits, hashBytes)] = tableEntry{offset: s + e.cur}
+				}
+				goto emitRemainder
+			}
+
+			// We could immediately start working at s now, but to improve
+			// compression we first update the hash table at s-2 and at s. If
+			// another emitCopy is not our next move, also calculate nextHash
+			// at s+1. At least on GOARCH=amd64, these three hash calculations
+			// are faster as one load64 call (with some shifts) instead of
+			// three load32 calls.
+			x := load6432(src, s-2)
+			o := e.cur + s - 2
+			prevHash := hashLen(x, tableBits, hashBytes)
+			e.table[prevHash] = tableEntry{offset: o}
+			x >>= 16
+			currHash := hashLen(x, tableBits, hashBytes)
+			candidate = e.table[currHash]
+			e.table[currHash] = tableEntry{offset: o + 2}
+
+			offset := s - (candidate.offset - e.cur)
+			if offset > maxMatchOffset || uint32(x) != load3232(src, candidate.offset-e.cur) {
+				cv = x >> 8
+				s++
+				break
+			}
+		}
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level2.go b/vendor/github.com/klauspost/compress/flate/level2.go
new file mode 100644
index 0000000000..876dfbe305
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level2.go
@@ -0,0 +1,214 @@
+package flate
+
+import "fmt"
+
+// fastGen maintains the table for matches,
+// and the previous byte block for level 2.
+// This is the generic implementation.
+type fastEncL2 struct {
+	fastGen
+	table [bTableSize]tableEntry
+}
+
+// EncodeL2 uses a similar algorithm to level 1, but is capable
+// of matching across blocks giving better compression at a small slowdown.
+func (e *fastEncL2) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		hashBytes              = 5
+	)
+
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntry{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.table[i].offset = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+	for {
+		// When should we start skipping if we haven't found matches in a long while.
+		const skipLog = 5
+		const doEvery = 2
+
+		nextS := s
+		var candidate tableEntry
+		for {
+			nextHash := hashLen(cv, bTableBits, hashBytes)
+			s = nextS
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+			candidate = e.table[nextHash]
+			now := load6432(src, nextS)
+			e.table[nextHash] = tableEntry{offset: s + e.cur}
+			nextHash = hashLen(now, bTableBits, hashBytes)
+
+			offset := s - (candidate.offset - e.cur)
+			if offset < maxMatchOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+				e.table[nextHash] = tableEntry{offset: nextS + e.cur}
+				break
+			}
+
+			// Do one right away...
+			cv = now
+			s = nextS
+			nextS++
+			candidate = e.table[nextHash]
+			now >>= 8
+			e.table[nextHash] = tableEntry{offset: s + e.cur}
+
+			offset = s - (candidate.offset - e.cur)
+			if offset < maxMatchOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+				break
+			}
+			cv = now
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+
+		// Call emitCopy, and then see if another emitCopy could be our next
+		// move. Repeat until we find no match for the input immediately after
+		// what was consumed by the last emitCopy call.
+		//
+		// If we exit this loop normally then we need to call emitLiteral next,
+		// though we don't yet know how big the literal will be. We handle that
+		// by proceeding to the next iteration of the main loop. We also can
+		// exit this loop via goto if we get close to exhausting the input.
+		for {
+			// Invariant: we have a 4-byte match at s, and no need to emit any
+			// literal bytes prior to s.
+
+			// Extend the 4-byte match as long as possible.
+			t := candidate.offset - e.cur
+			l := e.matchlenLong(s+4, t+4, src) + 4
+
+			// Extend backwards
+			for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+				s--
+				t--
+				l++
+			}
+			if nextEmit < s {
+				if false {
+					emitLiteral(dst, src[nextEmit:s])
+				} else {
+					for _, v := range src[nextEmit:s] {
+						dst.tokens[dst.n] = token(v)
+						dst.litHist[v]++
+						dst.n++
+					}
+				}
+			}
+
+			dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+			s += l
+			nextEmit = s
+			if nextS >= s {
+				s = nextS + 1
+			}
+
+			if s >= sLimit {
+				// Index first pair after match end.
+				if int(s+l+8) < len(src) {
+					cv := load6432(src, s)
+					e.table[hashLen(cv, bTableBits, hashBytes)] = tableEntry{offset: s + e.cur}
+				}
+				goto emitRemainder
+			}
+
+			// Store every second hash in-between, but offset by 1.
+			for i := s - l + 2; i < s-5; i += 7 {
+				x := load6432(src, i)
+				nextHash := hashLen(x, bTableBits, hashBytes)
+				e.table[nextHash] = tableEntry{offset: e.cur + i}
+				// Skip one
+				x >>= 16
+				nextHash = hashLen(x, bTableBits, hashBytes)
+				e.table[nextHash] = tableEntry{offset: e.cur + i + 2}
+				// Skip one
+				x >>= 16
+				nextHash = hashLen(x, bTableBits, hashBytes)
+				e.table[nextHash] = tableEntry{offset: e.cur + i + 4}
+			}
+
+			// We could immediately start working at s now, but to improve
+			// compression we first update the hash table at s-2 to s. If
+			// another emitCopy is not our next move, also calculate nextHash
+			// at s+1. At least on GOARCH=amd64, these three hash calculations
+			// are faster as one load64 call (with some shifts) instead of
+			// three load32 calls.
+			x := load6432(src, s-2)
+			o := e.cur + s - 2
+			prevHash := hashLen(x, bTableBits, hashBytes)
+			prevHash2 := hashLen(x>>8, bTableBits, hashBytes)
+			e.table[prevHash] = tableEntry{offset: o}
+			e.table[prevHash2] = tableEntry{offset: o + 1}
+			currHash := hashLen(x>>16, bTableBits, hashBytes)
+			candidate = e.table[currHash]
+			e.table[currHash] = tableEntry{offset: o + 2}
+
+			offset := s - (candidate.offset - e.cur)
+			if offset > maxMatchOffset || uint32(x>>16) != load3232(src, candidate.offset-e.cur) {
+				cv = x >> 24
+				s++
+				break
+			}
+		}
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level3.go b/vendor/github.com/klauspost/compress/flate/level3.go
new file mode 100644
index 0000000000..7aa2b72a12
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level3.go
@@ -0,0 +1,241 @@
+package flate
+
+import "fmt"
+
+// fastEncL3
+type fastEncL3 struct {
+	fastGen
+	table [1 << 16]tableEntryPrev
+}
+
+// Encode uses a similar algorithm to level 2, will check up to two candidates.
+func (e *fastEncL3) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		tableBits              = 16
+		tableSize              = 1 << tableBits
+		hashBytes              = 5
+	)
+
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntryPrev{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i]
+			if v.Cur.offset <= minOff {
+				v.Cur.offset = 0
+			} else {
+				v.Cur.offset = v.Cur.offset - e.cur + maxMatchOffset
+			}
+			if v.Prev.offset <= minOff {
+				v.Prev.offset = 0
+			} else {
+				v.Prev.offset = v.Prev.offset - e.cur + maxMatchOffset
+			}
+			e.table[i] = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// Skip if too small.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+	for {
+		const skipLog = 7
+		nextS := s
+		var candidate tableEntry
+		for {
+			nextHash := hashLen(cv, tableBits, hashBytes)
+			s = nextS
+			nextS = s + 1 + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+			candidates := e.table[nextHash]
+			now := load6432(src, nextS)
+
+			// Safe offset distance until s + 4...
+			minOffset := e.cur + s - (maxMatchOffset - 4)
+			e.table[nextHash] = tableEntryPrev{Prev: candidates.Cur, Cur: tableEntry{offset: s + e.cur}}
+
+			// Check both candidates
+			candidate = candidates.Cur
+			if candidate.offset < minOffset {
+				cv = now
+				// Previous will also be invalid, we have nothing.
+				continue
+			}
+
+			if uint32(cv) == load3232(src, candidate.offset-e.cur) {
+				if candidates.Prev.offset < minOffset || uint32(cv) != load3232(src, candidates.Prev.offset-e.cur) {
+					break
+				}
+				// Both match and are valid, pick longest.
+				offset := s - (candidate.offset - e.cur)
+				o2 := s - (candidates.Prev.offset - e.cur)
+				l1, l2 := matchLen(src[s+4:], src[s-offset+4:]), matchLen(src[s+4:], src[s-o2+4:])
+				if l2 > l1 {
+					candidate = candidates.Prev
+				}
+				break
+			} else {
+				// We only check if value mismatches.
+				// Offset will always be invalid in other cases.
+				candidate = candidates.Prev
+				if candidate.offset > minOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+					break
+				}
+			}
+			cv = now
+		}
+
+		// Call emitCopy, and then see if another emitCopy could be our next
+		// move. Repeat until we find no match for the input immediately after
+		// what was consumed by the last emitCopy call.
+		//
+		// If we exit this loop normally then we need to call emitLiteral next,
+		// though we don't yet know how big the literal will be. We handle that
+		// by proceeding to the next iteration of the main loop. We also can
+		// exit this loop via goto if we get close to exhausting the input.
+		for {
+			// Invariant: we have a 4-byte match at s, and no need to emit any
+			// literal bytes prior to s.
+
+			// Extend the 4-byte match as long as possible.
+			//
+			t := candidate.offset - e.cur
+			l := e.matchlenLong(s+4, t+4, src) + 4
+
+			// Extend backwards
+			for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+				s--
+				t--
+				l++
+			}
+			if nextEmit < s {
+				if false {
+					emitLiteral(dst, src[nextEmit:s])
+				} else {
+					for _, v := range src[nextEmit:s] {
+						dst.tokens[dst.n] = token(v)
+						dst.litHist[v]++
+						dst.n++
+					}
+				}
+			}
+
+			dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+			s += l
+			nextEmit = s
+			if nextS >= s {
+				s = nextS + 1
+			}
+
+			if s >= sLimit {
+				t += l
+				// Index first pair after match end.
+				if int(t+8) < len(src) && t > 0 {
+					cv = load6432(src, t)
+					nextHash := hashLen(cv, tableBits, hashBytes)
+					e.table[nextHash] = tableEntryPrev{
+						Prev: e.table[nextHash].Cur,
+						Cur:  tableEntry{offset: e.cur + t},
+					}
+				}
+				goto emitRemainder
+			}
+
+			// Store every 5th hash in-between.
+			for i := s - l + 2; i < s-5; i += 6 {
+				nextHash := hashLen(load6432(src, i), tableBits, hashBytes)
+				e.table[nextHash] = tableEntryPrev{
+					Prev: e.table[nextHash].Cur,
+					Cur:  tableEntry{offset: e.cur + i}}
+			}
+			// We could immediately start working at s now, but to improve
+			// compression we first update the hash table at s-2 to s.
+			x := load6432(src, s-2)
+			prevHash := hashLen(x, tableBits, hashBytes)
+
+			e.table[prevHash] = tableEntryPrev{
+				Prev: e.table[prevHash].Cur,
+				Cur:  tableEntry{offset: e.cur + s - 2},
+			}
+			x >>= 8
+			prevHash = hashLen(x, tableBits, hashBytes)
+
+			e.table[prevHash] = tableEntryPrev{
+				Prev: e.table[prevHash].Cur,
+				Cur:  tableEntry{offset: e.cur + s - 1},
+			}
+			x >>= 8
+			currHash := hashLen(x, tableBits, hashBytes)
+			candidates := e.table[currHash]
+			cv = x
+			e.table[currHash] = tableEntryPrev{
+				Prev: candidates.Cur,
+				Cur:  tableEntry{offset: s + e.cur},
+			}
+
+			// Check both candidates
+			candidate = candidates.Cur
+			minOffset := e.cur + s - (maxMatchOffset - 4)
+
+			if candidate.offset > minOffset {
+				if uint32(cv) == load3232(src, candidate.offset-e.cur) {
+					// Found a match...
+					continue
+				}
+				candidate = candidates.Prev
+				if candidate.offset > minOffset && uint32(cv) == load3232(src, candidate.offset-e.cur) {
+					// Match at prev...
+					continue
+				}
+			}
+			cv = x >> 8
+			s++
+			break
+		}
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level4.go b/vendor/github.com/klauspost/compress/flate/level4.go
new file mode 100644
index 0000000000..23c08b325c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level4.go
@@ -0,0 +1,221 @@
+package flate
+
+import "fmt"
+
+type fastEncL4 struct {
+	fastGen
+	table  [tableSize]tableEntry
+	bTable [tableSize]tableEntry
+}
+
+func (e *fastEncL4) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		hashShortBytes         = 4
+	)
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntry{}
+			}
+			for i := range e.bTable[:] {
+				e.bTable[i] = tableEntry{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.table[i].offset = v
+		}
+		for i := range e.bTable[:] {
+			v := e.bTable[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.bTable[i].offset = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+	for {
+		const skipLog = 6
+		const doEvery = 1
+
+		nextS := s
+		var t int32
+		for {
+			nextHashS := hashLen(cv, tableBits, hashShortBytes)
+			nextHashL := hash7(cv, tableBits)
+
+			s = nextS
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+			// Fetch a short+long candidate
+			sCandidate := e.table[nextHashS]
+			lCandidate := e.bTable[nextHashL]
+			next := load6432(src, nextS)
+			entry := tableEntry{offset: s + e.cur}
+			e.table[nextHashS] = entry
+			e.bTable[nextHashL] = entry
+
+			t = lCandidate.offset - e.cur
+			if s-t < maxMatchOffset && uint32(cv) == load3232(src, lCandidate.offset-e.cur) {
+				// We got a long match. Use that.
+				break
+			}
+
+			t = sCandidate.offset - e.cur
+			if s-t < maxMatchOffset && uint32(cv) == load3232(src, sCandidate.offset-e.cur) {
+				// Found a 4 match...
+				lCandidate = e.bTable[hash7(next, tableBits)]
+
+				// If the next long is a candidate, check if we should use that instead...
+				lOff := nextS - (lCandidate.offset - e.cur)
+				if lOff < maxMatchOffset && load3232(src, lCandidate.offset-e.cur) == uint32(next) {
+					l1, l2 := matchLen(src[s+4:], src[t+4:]), matchLen(src[nextS+4:], src[nextS-lOff+4:])
+					if l2 > l1 {
+						s = nextS
+						t = lCandidate.offset - e.cur
+					}
+				}
+				break
+			}
+			cv = next
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+
+		// Extend the 4-byte match as long as possible.
+		l := e.matchlenLong(s+4, t+4, src) + 4
+
+		// Extend backwards
+		for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+			s--
+			t--
+			l++
+		}
+		if nextEmit < s {
+			if false {
+				emitLiteral(dst, src[nextEmit:s])
+			} else {
+				for _, v := range src[nextEmit:s] {
+					dst.tokens[dst.n] = token(v)
+					dst.litHist[v]++
+					dst.n++
+				}
+			}
+		}
+		if debugDeflate {
+			if t >= s {
+				panic("s-t")
+			}
+			if (s - t) > maxMatchOffset {
+				panic(fmt.Sprintln("mmo", t))
+			}
+			if l < baseMatchLength {
+				panic("bml")
+			}
+		}
+
+		dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+		s += l
+		nextEmit = s
+		if nextS >= s {
+			s = nextS + 1
+		}
+
+		if s >= sLimit {
+			// Index first pair after match end.
+			if int(s+8) < len(src) {
+				cv := load6432(src, s)
+				e.table[hashLen(cv, tableBits, hashShortBytes)] = tableEntry{offset: s + e.cur}
+				e.bTable[hash7(cv, tableBits)] = tableEntry{offset: s + e.cur}
+			}
+			goto emitRemainder
+		}
+
+		// Store every 3rd hash in-between
+		if true {
+			i := nextS
+			if i < s-1 {
+				cv := load6432(src, i)
+				t := tableEntry{offset: i + e.cur}
+				t2 := tableEntry{offset: t.offset + 1}
+				e.bTable[hash7(cv, tableBits)] = t
+				e.bTable[hash7(cv>>8, tableBits)] = t2
+				e.table[hashLen(cv>>8, tableBits, hashShortBytes)] = t2
+
+				i += 3
+				for ; i < s-1; i += 3 {
+					cv := load6432(src, i)
+					t := tableEntry{offset: i + e.cur}
+					t2 := tableEntry{offset: t.offset + 1}
+					e.bTable[hash7(cv, tableBits)] = t
+					e.bTable[hash7(cv>>8, tableBits)] = t2
+					e.table[hashLen(cv>>8, tableBits, hashShortBytes)] = t2
+				}
+			}
+		}
+
+		// We could immediately start working at s now, but to improve
+		// compression we first update the hash table at s-1 and at s.
+		x := load6432(src, s-1)
+		o := e.cur + s - 1
+		prevHashS := hashLen(x, tableBits, hashShortBytes)
+		prevHashL := hash7(x, tableBits)
+		e.table[prevHashS] = tableEntry{offset: o}
+		e.bTable[prevHashL] = tableEntry{offset: o}
+		cv = x >> 8
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level5.go b/vendor/github.com/klauspost/compress/flate/level5.go
new file mode 100644
index 0000000000..83ef50ba45
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level5.go
@@ -0,0 +1,310 @@
+package flate
+
+import "fmt"
+
+type fastEncL5 struct {
+	fastGen
+	table  [tableSize]tableEntry
+	bTable [tableSize]tableEntryPrev
+}
+
+func (e *fastEncL5) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		hashShortBytes         = 4
+	)
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntry{}
+			}
+			for i := range e.bTable[:] {
+				e.bTable[i] = tableEntryPrev{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.table[i].offset = v
+		}
+		for i := range e.bTable[:] {
+			v := e.bTable[i]
+			if v.Cur.offset <= minOff {
+				v.Cur.offset = 0
+				v.Prev.offset = 0
+			} else {
+				v.Cur.offset = v.Cur.offset - e.cur + maxMatchOffset
+				if v.Prev.offset <= minOff {
+					v.Prev.offset = 0
+				} else {
+					v.Prev.offset = v.Prev.offset - e.cur + maxMatchOffset
+				}
+			}
+			e.bTable[i] = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+	for {
+		const skipLog = 6
+		const doEvery = 1
+
+		nextS := s
+		var l int32
+		var t int32
+		for {
+			nextHashS := hashLen(cv, tableBits, hashShortBytes)
+			nextHashL := hash7(cv, tableBits)
+
+			s = nextS
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+			// Fetch a short+long candidate
+			sCandidate := e.table[nextHashS]
+			lCandidate := e.bTable[nextHashL]
+			next := load6432(src, nextS)
+			entry := tableEntry{offset: s + e.cur}
+			e.table[nextHashS] = entry
+			eLong := &e.bTable[nextHashL]
+			eLong.Cur, eLong.Prev = entry, eLong.Cur
+
+			nextHashS = hashLen(next, tableBits, hashShortBytes)
+			nextHashL = hash7(next, tableBits)
+
+			t = lCandidate.Cur.offset - e.cur
+			if s-t < maxMatchOffset {
+				if uint32(cv) == load3232(src, lCandidate.Cur.offset-e.cur) {
+					// Store the next match
+					e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+					eLong := &e.bTable[nextHashL]
+					eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+
+					t2 := lCandidate.Prev.offset - e.cur
+					if s-t2 < maxMatchOffset && uint32(cv) == load3232(src, lCandidate.Prev.offset-e.cur) {
+						l = e.matchlen(s+4, t+4, src) + 4
+						ml1 := e.matchlen(s+4, t2+4, src) + 4
+						if ml1 > l {
+							t = t2
+							l = ml1
+							break
+						}
+					}
+					break
+				}
+				t = lCandidate.Prev.offset - e.cur
+				if s-t < maxMatchOffset && uint32(cv) == load3232(src, lCandidate.Prev.offset-e.cur) {
+					// Store the next match
+					e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+					eLong := &e.bTable[nextHashL]
+					eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+					break
+				}
+			}
+
+			t = sCandidate.offset - e.cur
+			if s-t < maxMatchOffset && uint32(cv) == load3232(src, sCandidate.offset-e.cur) {
+				// Found a 4 match...
+				l = e.matchlen(s+4, t+4, src) + 4
+				lCandidate = e.bTable[nextHashL]
+				// Store the next match
+
+				e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+				eLong := &e.bTable[nextHashL]
+				eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+
+				// If the next long is a candidate, use that...
+				t2 := lCandidate.Cur.offset - e.cur
+				if nextS-t2 < maxMatchOffset {
+					if load3232(src, lCandidate.Cur.offset-e.cur) == uint32(next) {
+						ml := e.matchlen(nextS+4, t2+4, src) + 4
+						if ml > l {
+							t = t2
+							s = nextS
+							l = ml
+							break
+						}
+					}
+					// If the previous long is a candidate, use that...
+					t2 = lCandidate.Prev.offset - e.cur
+					if nextS-t2 < maxMatchOffset && load3232(src, lCandidate.Prev.offset-e.cur) == uint32(next) {
+						ml := e.matchlen(nextS+4, t2+4, src) + 4
+						if ml > l {
+							t = t2
+							s = nextS
+							l = ml
+							break
+						}
+					}
+				}
+				break
+			}
+			cv = next
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+
+		if l == 0 {
+			// Extend the 4-byte match as long as possible.
+			l = e.matchlenLong(s+4, t+4, src) + 4
+		} else if l == maxMatchLength {
+			l += e.matchlenLong(s+l, t+l, src)
+		}
+
+		// Try to locate a better match by checking the end of best match...
+		if sAt := s + l; l < 30 && sAt < sLimit {
+			// Allow some bytes at the beginning to mismatch.
+			// Sweet spot is 2/3 bytes depending on input.
+			// 3 is only a little better when it is but sometimes a lot worse.
+			// The skipped bytes are tested in Extend backwards,
+			// and still picked up as part of the match if they do.
+			const skipBeginning = 2
+			eLong := e.bTable[hash7(load6432(src, sAt), tableBits)].Cur.offset
+			t2 := eLong - e.cur - l + skipBeginning
+			s2 := s + skipBeginning
+			off := s2 - t2
+			if t2 >= 0 && off < maxMatchOffset && off > 0 {
+				if l2 := e.matchlenLong(s2, t2, src); l2 > l {
+					t = t2
+					l = l2
+					s = s2
+				}
+			}
+		}
+
+		// Extend backwards
+		for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+			s--
+			t--
+			l++
+		}
+		if nextEmit < s {
+			if false {
+				emitLiteral(dst, src[nextEmit:s])
+			} else {
+				for _, v := range src[nextEmit:s] {
+					dst.tokens[dst.n] = token(v)
+					dst.litHist[v]++
+					dst.n++
+				}
+			}
+		}
+		if debugDeflate {
+			if t >= s {
+				panic(fmt.Sprintln("s-t", s, t))
+			}
+			if (s - t) > maxMatchOffset {
+				panic(fmt.Sprintln("mmo", s-t))
+			}
+			if l < baseMatchLength {
+				panic("bml")
+			}
+		}
+
+		dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+		s += l
+		nextEmit = s
+		if nextS >= s {
+			s = nextS + 1
+		}
+
+		if s >= sLimit {
+			goto emitRemainder
+		}
+
+		// Store every 3rd hash in-between.
+		if true {
+			const hashEvery = 3
+			i := s - l + 1
+			if i < s-1 {
+				cv := load6432(src, i)
+				t := tableEntry{offset: i + e.cur}
+				e.table[hashLen(cv, tableBits, hashShortBytes)] = t
+				eLong := &e.bTable[hash7(cv, tableBits)]
+				eLong.Cur, eLong.Prev = t, eLong.Cur
+
+				// Do an long at i+1
+				cv >>= 8
+				t = tableEntry{offset: t.offset + 1}
+				eLong = &e.bTable[hash7(cv, tableBits)]
+				eLong.Cur, eLong.Prev = t, eLong.Cur
+
+				// We only have enough bits for a short entry at i+2
+				cv >>= 8
+				t = tableEntry{offset: t.offset + 1}
+				e.table[hashLen(cv, tableBits, hashShortBytes)] = t
+
+				// Skip one - otherwise we risk hitting 's'
+				i += 4
+				for ; i < s-1; i += hashEvery {
+					cv := load6432(src, i)
+					t := tableEntry{offset: i + e.cur}
+					t2 := tableEntry{offset: t.offset + 1}
+					eLong := &e.bTable[hash7(cv, tableBits)]
+					eLong.Cur, eLong.Prev = t, eLong.Cur
+					e.table[hashLen(cv>>8, tableBits, hashShortBytes)] = t2
+				}
+			}
+		}
+
+		// We could immediately start working at s now, but to improve
+		// compression we first update the hash table at s-1 and at s.
+		x := load6432(src, s-1)
+		o := e.cur + s - 1
+		prevHashS := hashLen(x, tableBits, hashShortBytes)
+		prevHashL := hash7(x, tableBits)
+		e.table[prevHashS] = tableEntry{offset: o}
+		eLong := &e.bTable[prevHashL]
+		eLong.Cur, eLong.Prev = tableEntry{offset: o}, eLong.Cur
+		cv = x >> 8
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/level6.go b/vendor/github.com/klauspost/compress/flate/level6.go
new file mode 100644
index 0000000000..f1e9d98fa5
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/level6.go
@@ -0,0 +1,325 @@
+package flate
+
+import "fmt"
+
+type fastEncL6 struct {
+	fastGen
+	table  [tableSize]tableEntry
+	bTable [tableSize]tableEntryPrev
+}
+
+func (e *fastEncL6) Encode(dst *tokens, src []byte) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+		hashShortBytes         = 4
+	)
+	if debugDeflate && e.cur < 0 {
+		panic(fmt.Sprint("e.cur < 0: ", e.cur))
+	}
+
+	// Protect against e.cur wraparound.
+	for e.cur >= bufferReset {
+		if len(e.hist) == 0 {
+			for i := range e.table[:] {
+				e.table[i] = tableEntry{}
+			}
+			for i := range e.bTable[:] {
+				e.bTable[i] = tableEntryPrev{}
+			}
+			e.cur = maxMatchOffset
+			break
+		}
+		// Shift down everything in the table that isn't already too far away.
+		minOff := e.cur + int32(len(e.hist)) - maxMatchOffset
+		for i := range e.table[:] {
+			v := e.table[i].offset
+			if v <= minOff {
+				v = 0
+			} else {
+				v = v - e.cur + maxMatchOffset
+			}
+			e.table[i].offset = v
+		}
+		for i := range e.bTable[:] {
+			v := e.bTable[i]
+			if v.Cur.offset <= minOff {
+				v.Cur.offset = 0
+				v.Prev.offset = 0
+			} else {
+				v.Cur.offset = v.Cur.offset - e.cur + maxMatchOffset
+				if v.Prev.offset <= minOff {
+					v.Prev.offset = 0
+				} else {
+					v.Prev.offset = v.Prev.offset - e.cur + maxMatchOffset
+				}
+			}
+			e.bTable[i] = v
+		}
+		e.cur = maxMatchOffset
+	}
+
+	s := e.addBlock(src)
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = uint16(len(src))
+		return
+	}
+
+	// Override src
+	src = e.hist
+	nextEmit := s
+
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int32(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load6432(src, s)
+	// Repeat MUST be > 1 and within range
+	repeat := int32(1)
+	for {
+		const skipLog = 7
+		const doEvery = 1
+
+		nextS := s
+		var l int32
+		var t int32
+		for {
+			nextHashS := hashLen(cv, tableBits, hashShortBytes)
+			nextHashL := hash7(cv, tableBits)
+			s = nextS
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit {
+				goto emitRemainder
+			}
+			// Fetch a short+long candidate
+			sCandidate := e.table[nextHashS]
+			lCandidate := e.bTable[nextHashL]
+			next := load6432(src, nextS)
+			entry := tableEntry{offset: s + e.cur}
+			e.table[nextHashS] = entry
+			eLong := &e.bTable[nextHashL]
+			eLong.Cur, eLong.Prev = entry, eLong.Cur
+
+			// Calculate hashes of 'next'
+			nextHashS = hashLen(next, tableBits, hashShortBytes)
+			nextHashL = hash7(next, tableBits)
+
+			t = lCandidate.Cur.offset - e.cur
+			if s-t < maxMatchOffset {
+				if uint32(cv) == load3232(src, lCandidate.Cur.offset-e.cur) {
+					// Long candidate matches at least 4 bytes.
+
+					// Store the next match
+					e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+					eLong := &e.bTable[nextHashL]
+					eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+
+					// Check the previous long candidate as well.
+					t2 := lCandidate.Prev.offset - e.cur
+					if s-t2 < maxMatchOffset && uint32(cv) == load3232(src, lCandidate.Prev.offset-e.cur) {
+						l = e.matchlen(s+4, t+4, src) + 4
+						ml1 := e.matchlen(s+4, t2+4, src) + 4
+						if ml1 > l {
+							t = t2
+							l = ml1
+							break
+						}
+					}
+					break
+				}
+				// Current value did not match, but check if previous long value does.
+				t = lCandidate.Prev.offset - e.cur
+				if s-t < maxMatchOffset && uint32(cv) == load3232(src, lCandidate.Prev.offset-e.cur) {
+					// Store the next match
+					e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+					eLong := &e.bTable[nextHashL]
+					eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+					break
+				}
+			}
+
+			t = sCandidate.offset - e.cur
+			if s-t < maxMatchOffset && uint32(cv) == load3232(src, sCandidate.offset-e.cur) {
+				// Found a 4 match...
+				l = e.matchlen(s+4, t+4, src) + 4
+
+				// Look up next long candidate (at nextS)
+				lCandidate = e.bTable[nextHashL]
+
+				// Store the next match
+				e.table[nextHashS] = tableEntry{offset: nextS + e.cur}
+				eLong := &e.bTable[nextHashL]
+				eLong.Cur, eLong.Prev = tableEntry{offset: nextS + e.cur}, eLong.Cur
+
+				// Check repeat at s + repOff
+				const repOff = 1
+				t2 := s - repeat + repOff
+				if load3232(src, t2) == uint32(cv>>(8*repOff)) {
+					ml := e.matchlen(s+4+repOff, t2+4, src) + 4
+					if ml > l {
+						t = t2
+						l = ml
+						s += repOff
+						// Not worth checking more.
+						break
+					}
+				}
+
+				// If the next long is a candidate, use that...
+				t2 = lCandidate.Cur.offset - e.cur
+				if nextS-t2 < maxMatchOffset {
+					if load3232(src, lCandidate.Cur.offset-e.cur) == uint32(next) {
+						ml := e.matchlen(nextS+4, t2+4, src) + 4
+						if ml > l {
+							t = t2
+							s = nextS
+							l = ml
+							// This is ok, but check previous as well.
+						}
+					}
+					// If the previous long is a candidate, use that...
+					t2 = lCandidate.Prev.offset - e.cur
+					if nextS-t2 < maxMatchOffset && load3232(src, lCandidate.Prev.offset-e.cur) == uint32(next) {
+						ml := e.matchlen(nextS+4, t2+4, src) + 4
+						if ml > l {
+							t = t2
+							s = nextS
+							l = ml
+							break
+						}
+					}
+				}
+				break
+			}
+			cv = next
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+
+		// Extend the 4-byte match as long as possible.
+		if l == 0 {
+			l = e.matchlenLong(s+4, t+4, src) + 4
+		} else if l == maxMatchLength {
+			l += e.matchlenLong(s+l, t+l, src)
+		}
+
+		// Try to locate a better match by checking the end-of-match...
+		if sAt := s + l; sAt < sLimit {
+			// Allow some bytes at the beginning to mismatch.
+			// Sweet spot is 2/3 bytes depending on input.
+			// 3 is only a little better when it is but sometimes a lot worse.
+			// The skipped bytes are tested in Extend backwards,
+			// and still picked up as part of the match if they do.
+			const skipBeginning = 2
+			eLong := &e.bTable[hash7(load6432(src, sAt), tableBits)]
+			// Test current
+			t2 := eLong.Cur.offset - e.cur - l + skipBeginning
+			s2 := s + skipBeginning
+			off := s2 - t2
+			if off < maxMatchOffset {
+				if off > 0 && t2 >= 0 {
+					if l2 := e.matchlenLong(s2, t2, src); l2 > l {
+						t = t2
+						l = l2
+						s = s2
+					}
+				}
+				// Test next:
+				t2 = eLong.Prev.offset - e.cur - l + skipBeginning
+				off := s2 - t2
+				if off > 0 && off < maxMatchOffset && t2 >= 0 {
+					if l2 := e.matchlenLong(s2, t2, src); l2 > l {
+						t = t2
+						l = l2
+						s = s2
+					}
+				}
+			}
+		}
+
+		// Extend backwards
+		for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+			s--
+			t--
+			l++
+		}
+		if nextEmit < s {
+			if false {
+				emitLiteral(dst, src[nextEmit:s])
+			} else {
+				for _, v := range src[nextEmit:s] {
+					dst.tokens[dst.n] = token(v)
+					dst.litHist[v]++
+					dst.n++
+				}
+			}
+		}
+		if false {
+			if t >= s {
+				panic(fmt.Sprintln("s-t", s, t))
+			}
+			if (s - t) > maxMatchOffset {
+				panic(fmt.Sprintln("mmo", s-t))
+			}
+			if l < baseMatchLength {
+				panic("bml")
+			}
+		}
+
+		dst.AddMatchLong(l, uint32(s-t-baseMatchOffset))
+		repeat = s - t
+		s += l
+		nextEmit = s
+		if nextS >= s {
+			s = nextS + 1
+		}
+
+		if s >= sLimit {
+			// Index after match end.
+			for i := nextS + 1; i < int32(len(src))-8; i += 2 {
+				cv := load6432(src, i)
+				e.table[hashLen(cv, tableBits, hashShortBytes)] = tableEntry{offset: i + e.cur}
+				eLong := &e.bTable[hash7(cv, tableBits)]
+				eLong.Cur, eLong.Prev = tableEntry{offset: i + e.cur}, eLong.Cur
+			}
+			goto emitRemainder
+		}
+
+		// Store every long hash in-between and every second short.
+		if true {
+			for i := nextS + 1; i < s-1; i += 2 {
+				cv := load6432(src, i)
+				t := tableEntry{offset: i + e.cur}
+				t2 := tableEntry{offset: t.offset + 1}
+				eLong := &e.bTable[hash7(cv, tableBits)]
+				eLong2 := &e.bTable[hash7(cv>>8, tableBits)]
+				e.table[hashLen(cv, tableBits, hashShortBytes)] = t
+				eLong.Cur, eLong.Prev = t, eLong.Cur
+				eLong2.Cur, eLong2.Prev = t2, eLong2.Cur
+			}
+		}
+
+		// We could immediately start working at s now, but to improve
+		// compression we first update the hash table at s-1 and at s.
+		cv = load6432(src, s)
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/reader_test.go b/vendor/github.com/klauspost/compress/flate/reader_test.go
new file mode 100644
index 0000000000..bc83c1f1d9
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/reader_test.go
@@ -0,0 +1,106 @@
+// Copyright 2012 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 flate
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func TestNlitOutOfRange(t *testing.T) {
+	// Trying to decode this bogus flate data, which has a Huffman table
+	// with nlit=288, should not panic.
+	io.Copy(io.Discard, NewReader(strings.NewReader(
+		"\xfc\xfe\x36\xe7\x5e\x1c\xef\xb3\x55\x58\x77\xb6\x56\xb5\x43\xf4"+
+			"\x6f\xf2\xd2\xe6\x3d\x99\xa0\x85\x8c\x48\xeb\xf8\xda\x83\x04\x2a"+
+			"\x75\xc4\xf8\x0f\x12\x11\xb9\xb4\x4b\x09\xa0\xbe\x8b\x91\x4c")))
+}
+
+const (
+	digits = iota
+	twain
+	random
+)
+
+var testfiles = []string{
+	// Digits is the digits of the irrational number e. Its decimal representation
+	// does not repeat, but there are only 10 possible digits, so it should be
+	// reasonably compressible.
+	digits: "../testdata/e.txt",
+	// Twain is Project Gutenberg's edition of Mark Twain's classic English novel.
+	twain: "../testdata/Mark.Twain-Tom.Sawyer.txt",
+	// Random bytes
+	random: "../testdata/sharnd.out",
+}
+
+func benchmarkDecode(b *testing.B, testfile, level, n int) {
+	b.ReportAllocs()
+	b.StopTimer()
+	b.SetBytes(int64(n))
+	buf0, err := os.ReadFile(testfiles[testfile])
+	if err != nil {
+		b.Fatal(err)
+	}
+	if len(buf0) == 0 {
+		b.Fatalf("test file %q has no data", testfiles[testfile])
+	}
+	compressed := new(bytes.Buffer)
+	w, err := NewWriter(compressed, level)
+	if err != nil {
+		b.Fatal(err)
+	}
+	for i := 0; i < n; i += len(buf0) {
+		if len(buf0) > n-i {
+			buf0 = buf0[:n-i]
+		}
+		io.Copy(w, bytes.NewReader(buf0))
+	}
+	w.Close()
+	buf1 := compressed.Bytes()
+	buf0, compressed, w = nil, nil, nil
+	runtime.GC()
+	b.StartTimer()
+	r := NewReader(bytes.NewReader(buf1))
+	res := r.(Resetter)
+	for i := 0; i < b.N; i++ {
+		res.Reset(bytes.NewReader(buf1), nil)
+		io.Copy(io.Discard, r)
+	}
+}
+
+// These short names are so that gofmt doesn't break the BenchmarkXxx function
+// bodies below over multiple lines.
+const (
+	constant = ConstantCompression
+	speed    = BestSpeed
+	default_ = DefaultCompression
+	compress = BestCompression
+)
+
+func BenchmarkDecodeDigitsSpeed1e4(b *testing.B)    { benchmarkDecode(b, digits, speed, 1e4) }
+func BenchmarkDecodeDigitsSpeed1e5(b *testing.B)    { benchmarkDecode(b, digits, speed, 1e5) }
+func BenchmarkDecodeDigitsSpeed1e6(b *testing.B)    { benchmarkDecode(b, digits, speed, 1e6) }
+func BenchmarkDecodeDigitsDefault1e4(b *testing.B)  { benchmarkDecode(b, digits, default_, 1e4) }
+func BenchmarkDecodeDigitsDefault1e5(b *testing.B)  { benchmarkDecode(b, digits, default_, 1e5) }
+func BenchmarkDecodeDigitsDefault1e6(b *testing.B)  { benchmarkDecode(b, digits, default_, 1e6) }
+func BenchmarkDecodeDigitsCompress1e4(b *testing.B) { benchmarkDecode(b, digits, compress, 1e4) }
+func BenchmarkDecodeDigitsCompress1e5(b *testing.B) { benchmarkDecode(b, digits, compress, 1e5) }
+func BenchmarkDecodeDigitsCompress1e6(b *testing.B) { benchmarkDecode(b, digits, compress, 1e6) }
+func BenchmarkDecodeTwainSpeed1e4(b *testing.B)     { benchmarkDecode(b, twain, speed, 1e4) }
+func BenchmarkDecodeTwainSpeed1e5(b *testing.B)     { benchmarkDecode(b, twain, speed, 1e5) }
+func BenchmarkDecodeTwainSpeed1e6(b *testing.B)     { benchmarkDecode(b, twain, speed, 1e6) }
+func BenchmarkDecodeTwainDefault1e4(b *testing.B)   { benchmarkDecode(b, twain, default_, 1e4) }
+func BenchmarkDecodeTwainDefault1e5(b *testing.B)   { benchmarkDecode(b, twain, default_, 1e5) }
+func BenchmarkDecodeTwainDefault1e6(b *testing.B)   { benchmarkDecode(b, twain, default_, 1e6) }
+func BenchmarkDecodeTwainCompress1e4(b *testing.B)  { benchmarkDecode(b, twain, compress, 1e4) }
+func BenchmarkDecodeTwainCompress1e5(b *testing.B)  { benchmarkDecode(b, twain, compress, 1e5) }
+func BenchmarkDecodeTwainCompress1e6(b *testing.B)  { benchmarkDecode(b, twain, compress, 1e6) }
+func BenchmarkDecodeRandomSpeed1e4(b *testing.B)    { benchmarkDecode(b, random, speed, 1e4) }
+func BenchmarkDecodeRandomSpeed1e5(b *testing.B)    { benchmarkDecode(b, random, speed, 1e5) }
+func BenchmarkDecodeRandomSpeed1e6(b *testing.B)    { benchmarkDecode(b, random, speed, 1e6) }
diff --git a/vendor/github.com/klauspost/compress/flate/regmask_amd64.go b/vendor/github.com/klauspost/compress/flate/regmask_amd64.go
new file mode 100644
index 0000000000..6ed28061b2
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/regmask_amd64.go
@@ -0,0 +1,37 @@
+package flate
+
+const (
+	// Masks for shifts with register sizes of the shift value.
+	// This can be used to work around the x86 design of shifting by mod register size.
+	// It can be used when a variable shift is always smaller than the register size.
+
+	// reg8SizeMaskX - shift value is 8 bits, shifted is X
+	reg8SizeMask8  = 7
+	reg8SizeMask16 = 15
+	reg8SizeMask32 = 31
+	reg8SizeMask64 = 63
+
+	// reg16SizeMaskX - shift value is 16 bits, shifted is X
+	reg16SizeMask8  = reg8SizeMask8
+	reg16SizeMask16 = reg8SizeMask16
+	reg16SizeMask32 = reg8SizeMask32
+	reg16SizeMask64 = reg8SizeMask64
+
+	// reg32SizeMaskX - shift value is 32 bits, shifted is X
+	reg32SizeMask8  = reg8SizeMask8
+	reg32SizeMask16 = reg8SizeMask16
+	reg32SizeMask32 = reg8SizeMask32
+	reg32SizeMask64 = reg8SizeMask64
+
+	// reg64SizeMaskX - shift value is 64 bits, shifted is X
+	reg64SizeMask8  = reg8SizeMask8
+	reg64SizeMask16 = reg8SizeMask16
+	reg64SizeMask32 = reg8SizeMask32
+	reg64SizeMask64 = reg8SizeMask64
+
+	// regSizeMaskUintX - shift value is uint, shifted is X
+	regSizeMaskUint8  = reg8SizeMask8
+	regSizeMaskUint16 = reg8SizeMask16
+	regSizeMaskUint32 = reg8SizeMask32
+	regSizeMaskUint64 = reg8SizeMask64
+)
diff --git a/vendor/github.com/klauspost/compress/flate/regmask_other.go b/vendor/github.com/klauspost/compress/flate/regmask_other.go
new file mode 100644
index 0000000000..1b7a2cbd79
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/regmask_other.go
@@ -0,0 +1,40 @@
+//go:build !amd64
+// +build !amd64
+
+package flate
+
+const (
+	// Masks for shifts with register sizes of the shift value.
+	// This can be used to work around the x86 design of shifting by mod register size.
+	// It can be used when a variable shift is always smaller than the register size.
+
+	// reg8SizeMaskX - shift value is 8 bits, shifted is X
+	reg8SizeMask8  = 0xff
+	reg8SizeMask16 = 0xff
+	reg8SizeMask32 = 0xff
+	reg8SizeMask64 = 0xff
+
+	// reg16SizeMaskX - shift value is 16 bits, shifted is X
+	reg16SizeMask8  = 0xffff
+	reg16SizeMask16 = 0xffff
+	reg16SizeMask32 = 0xffff
+	reg16SizeMask64 = 0xffff
+
+	// reg32SizeMaskX - shift value is 32 bits, shifted is X
+	reg32SizeMask8  = 0xffffffff
+	reg32SizeMask16 = 0xffffffff
+	reg32SizeMask32 = 0xffffffff
+	reg32SizeMask64 = 0xffffffff
+
+	// reg64SizeMaskX - shift value is 64 bits, shifted is X
+	reg64SizeMask8  = 0xffffffffffffffff
+	reg64SizeMask16 = 0xffffffffffffffff
+	reg64SizeMask32 = 0xffffffffffffffff
+	reg64SizeMask64 = 0xffffffffffffffff
+
+	// regSizeMaskUintX - shift value is uint, shifted is X
+	regSizeMaskUint8  = ^uint(0)
+	regSizeMaskUint16 = ^uint(0)
+	regSizeMaskUint32 = ^uint(0)
+	regSizeMaskUint64 = ^uint(0)
+)
diff --git a/vendor/github.com/klauspost/compress/flate/stateless.go b/vendor/github.com/klauspost/compress/flate/stateless.go
new file mode 100644
index 0000000000..f3d4139ef3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/stateless.go
@@ -0,0 +1,318 @@
+package flate
+
+import (
+	"io"
+	"math"
+	"sync"
+)
+
+const (
+	maxStatelessBlock = math.MaxInt16
+	// dictionary will be taken from maxStatelessBlock, so limit it.
+	maxStatelessDict = 8 << 10
+
+	slTableBits  = 13
+	slTableSize  = 1 << slTableBits
+	slTableShift = 32 - slTableBits
+)
+
+type statelessWriter struct {
+	dst    io.Writer
+	closed bool
+}
+
+func (s *statelessWriter) Close() error {
+	if s.closed {
+		return nil
+	}
+	s.closed = true
+	// Emit EOF block
+	return StatelessDeflate(s.dst, nil, true, nil)
+}
+
+func (s *statelessWriter) Write(p []byte) (n int, err error) {
+	err = StatelessDeflate(s.dst, p, false, nil)
+	if err != nil {
+		return 0, err
+	}
+	return len(p), nil
+}
+
+func (s *statelessWriter) Reset(w io.Writer) {
+	s.dst = w
+	s.closed = false
+}
+
+// NewStatelessWriter will do compression but without maintaining any state
+// between Write calls.
+// There will be no memory kept between Write calls,
+// but compression and speed will be suboptimal.
+// Because of this, the size of actual Write calls will affect output size.
+func NewStatelessWriter(dst io.Writer) io.WriteCloser {
+	return &statelessWriter{dst: dst}
+}
+
+// bitWriterPool contains bit writers that can be reused.
+var bitWriterPool = sync.Pool{
+	New: func() interface{} {
+		return newHuffmanBitWriter(nil)
+	},
+}
+
+// StatelessDeflate allows compressing directly to a Writer without retaining state.
+// When returning everything will be flushed.
+// Up to 8KB of an optional dictionary can be given which is presumed to precede the block.
+// Longer dictionaries will be truncated and will still produce valid output.
+// Sending nil dictionary is perfectly fine.
+func StatelessDeflate(out io.Writer, in []byte, eof bool, dict []byte) error {
+	var dst tokens
+	bw := bitWriterPool.Get().(*huffmanBitWriter)
+	bw.reset(out)
+	defer func() {
+		// don't keep a reference to our output
+		bw.reset(nil)
+		bitWriterPool.Put(bw)
+	}()
+	if eof && len(in) == 0 {
+		// Just write an EOF block.
+		// Could be faster...
+		bw.writeStoredHeader(0, true)
+		bw.flush()
+		return bw.err
+	}
+
+	// Truncate dict
+	if len(dict) > maxStatelessDict {
+		dict = dict[len(dict)-maxStatelessDict:]
+	}
+
+	// For subsequent loops, keep shallow dict reference to avoid alloc+copy.
+	var inDict []byte
+
+	for len(in) > 0 {
+		todo := in
+		if len(inDict) > 0 {
+			if len(todo) > maxStatelessBlock-maxStatelessDict {
+				todo = todo[:maxStatelessBlock-maxStatelessDict]
+			}
+		} else if len(todo) > maxStatelessBlock-len(dict) {
+			todo = todo[:maxStatelessBlock-len(dict)]
+		}
+		inOrg := in
+		in = in[len(todo):]
+		uncompressed := todo
+		if len(dict) > 0 {
+			// combine dict and source
+			bufLen := len(todo) + len(dict)
+			combined := make([]byte, bufLen)
+			copy(combined, dict)
+			copy(combined[len(dict):], todo)
+			todo = combined
+		}
+		// Compress
+		if len(inDict) == 0 {
+			statelessEnc(&dst, todo, int16(len(dict)))
+		} else {
+			statelessEnc(&dst, inDict[:maxStatelessDict+len(todo)], maxStatelessDict)
+		}
+		isEof := eof && len(in) == 0
+
+		if dst.n == 0 {
+			bw.writeStoredHeader(len(uncompressed), isEof)
+			if bw.err != nil {
+				return bw.err
+			}
+			bw.writeBytes(uncompressed)
+		} else if int(dst.n) > len(uncompressed)-len(uncompressed)>>4 {
+			// If we removed less than 1/16th, huffman compress the block.
+			bw.writeBlockHuff(isEof, uncompressed, len(in) == 0)
+		} else {
+			bw.writeBlockDynamic(&dst, isEof, uncompressed, len(in) == 0)
+		}
+		if len(in) > 0 {
+			// Retain a dict if we have more
+			inDict = inOrg[len(uncompressed)-maxStatelessDict:]
+			dict = nil
+			dst.Reset()
+		}
+		if bw.err != nil {
+			return bw.err
+		}
+	}
+	if !eof {
+		// Align, only a stored block can do that.
+		bw.writeStoredHeader(0, false)
+	}
+	bw.flush()
+	return bw.err
+}
+
+func hashSL(u uint32) uint32 {
+	return (u * 0x1e35a7bd) >> slTableShift
+}
+
+func load3216(b []byte, i int16) uint32 {
+	// Help the compiler eliminate bounds checks on the read so it can be done in a single read.
+	b = b[i:]
+	b = b[:4]
+	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+}
+
+func load6416(b []byte, i int16) uint64 {
+	// Help the compiler eliminate bounds checks on the read so it can be done in a single read.
+	b = b[i:]
+	b = b[:8]
+	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
+		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+}
+
+func statelessEnc(dst *tokens, src []byte, startAt int16) {
+	const (
+		inputMargin            = 12 - 1
+		minNonLiteralBlockSize = 1 + 1 + inputMargin
+	)
+
+	type tableEntry struct {
+		offset int16
+	}
+
+	var table [slTableSize]tableEntry
+
+	// This check isn't in the Snappy implementation, but there, the caller
+	// instead of the callee handles this case.
+	if len(src)-int(startAt) < minNonLiteralBlockSize {
+		// We do not fill the token table.
+		// This will be picked up by caller.
+		dst.n = 0
+		return
+	}
+	// Index until startAt
+	if startAt > 0 {
+		cv := load3232(src, 0)
+		for i := int16(0); i < startAt; i++ {
+			table[hashSL(cv)] = tableEntry{offset: i}
+			cv = (cv >> 8) | (uint32(src[i+4]) << 24)
+		}
+	}
+
+	s := startAt + 1
+	nextEmit := startAt
+	// sLimit is when to stop looking for offset/length copies. The inputMargin
+	// lets us use a fast path for emitLiteral in the main loop, while we are
+	// looking for copies.
+	sLimit := int16(len(src) - inputMargin)
+
+	// nextEmit is where in src the next emitLiteral should start from.
+	cv := load3216(src, s)
+
+	for {
+		const skipLog = 5
+		const doEvery = 2
+
+		nextS := s
+		var candidate tableEntry
+		for {
+			nextHash := hashSL(cv)
+			candidate = table[nextHash]
+			nextS = s + doEvery + (s-nextEmit)>>skipLog
+			if nextS > sLimit || nextS <= 0 {
+				goto emitRemainder
+			}
+
+			now := load6416(src, nextS)
+			table[nextHash] = tableEntry{offset: s}
+			nextHash = hashSL(uint32(now))
+
+			if cv == load3216(src, candidate.offset) {
+				table[nextHash] = tableEntry{offset: nextS}
+				break
+			}
+
+			// Do one right away...
+			cv = uint32(now)
+			s = nextS
+			nextS++
+			candidate = table[nextHash]
+			now >>= 8
+			table[nextHash] = tableEntry{offset: s}
+
+			if cv == load3216(src, candidate.offset) {
+				table[nextHash] = tableEntry{offset: nextS}
+				break
+			}
+			cv = uint32(now)
+			s = nextS
+		}
+
+		// A 4-byte match has been found. We'll later see if more than 4 bytes
+		// match. But, prior to the match, src[nextEmit:s] are unmatched. Emit
+		// them as literal bytes.
+		for {
+			// Invariant: we have a 4-byte match at s, and no need to emit any
+			// literal bytes prior to s.
+
+			// Extend the 4-byte match as long as possible.
+			t := candidate.offset
+			l := int16(matchLen(src[s+4:], src[t+4:]) + 4)
+
+			// Extend backwards
+			for t > 0 && s > nextEmit && src[t-1] == src[s-1] {
+				s--
+				t--
+				l++
+			}
+			if nextEmit < s {
+				if false {
+					emitLiteral(dst, src[nextEmit:s])
+				} else {
+					for _, v := range src[nextEmit:s] {
+						dst.tokens[dst.n] = token(v)
+						dst.litHist[v]++
+						dst.n++
+					}
+				}
+			}
+
+			// Save the match found
+			dst.AddMatchLong(int32(l), uint32(s-t-baseMatchOffset))
+			s += l
+			nextEmit = s
+			if nextS >= s {
+				s = nextS + 1
+			}
+			if s >= sLimit {
+				goto emitRemainder
+			}
+
+			// We could immediately start working at s now, but to improve
+			// compression we first update the hash table at s-2 and at s. If
+			// another emitCopy is not our next move, also calculate nextHash
+			// at s+1. At least on GOARCH=amd64, these three hash calculations
+			// are faster as one load64 call (with some shifts) instead of
+			// three load32 calls.
+			x := load6416(src, s-2)
+			o := s - 2
+			prevHash := hashSL(uint32(x))
+			table[prevHash] = tableEntry{offset: o}
+			x >>= 16
+			currHash := hashSL(uint32(x))
+			candidate = table[currHash]
+			table[currHash] = tableEntry{offset: o + 2}
+
+			if uint32(x) != load3216(src, candidate.offset) {
+				cv = uint32(x >> 8)
+				s++
+				break
+			}
+		}
+	}
+
+emitRemainder:
+	if int(nextEmit) < len(src) {
+		// If nothing was added, don't encode literals.
+		if dst.n == 0 {
+			return
+		}
+		emitLiteral(dst, src[nextEmit:])
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/fuzz/FuzzEncoding.zip b/vendor/github.com/klauspost/compress/flate/testdata/fuzz/FuzzEncoding.zip
new file mode 100644
index 0000000000..feae35f15f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/fuzz/FuzzEncoding.zip
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/fuzz/encode-raw-corpus.zip b/vendor/github.com/klauspost/compress/flate/testdata/fuzz/encode-raw-corpus.zip
new file mode 100644
index 0000000000..7b33f54fc0
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/fuzz/encode-raw-corpus.zip
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect
new file mode 100644
index 0000000000..f4e27a8146
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect-noinput
new file mode 100644
index 0000000000..f4e27a8146
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.golden
new file mode 100644
index 0000000000..db422ca398
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.in
new file mode 100644
index 0000000000..5dfddf075b
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.in
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect
new file mode 100644
index 0000000000..c08165143f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect-noinput
new file mode 100644
index 0000000000..c08165143f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect
new file mode 100644
index 0000000000..c08165143f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect-noinput
new file mode 100644
index 0000000000..c08165143f
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-null-max.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect
new file mode 100644
index 0000000000..66c76ceb23
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect-noinput
new file mode 100644
index 0000000000..66c76ceb23
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.golden
new file mode 100644
index 0000000000..23d8f7f98b
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.in
new file mode 100644
index 0000000000..efaed43431
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.in
@@ -0,0 +1 @@
+3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609433057270365759591953092186117381932611793105118548074462379962749567351885752724891227938183011949129833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132000568127145263560827785771342757789609173637178721468440901224953430146549585371050792279689258923542019956112129021960864034418159813629774771309960518707211349999998372978049951059731732816096318595024459455346908302642522308253344685035261931188171010003137838752886587533208381420617177669147303598253490428755468731159562863882353787593751957781857780532171226806613001927876611195909216420198938095257201065485863278865936153381827968230301952035301852968995773622599413891249721775283479131515574857242454150695950829533116861727855889075098381754637464939319255060400927701671139009848824012858361603563707660104710181942955596198946767837449448255379774726847104047534646208046684259069491293313677028989152104752162056966024058038150193511253382430035587640247496473263914199272604269922796782354781636009341721641219924586315030286182974555706749838505494588586926995690927210797509302955321165344987202755960236480665499119881834797753566369807426542527862551818417574672890977772793800081647060016145249192173217214772350141441973568548161361157352552133475741849468438523323907394143334547762416862518983569485562099219222184272550254256887671790494601653466804988627232791786085784383827967976681454100953883786360950680064225125205117392984896084128488626945604241965285022210661186306744278622039194945047123713786960956364371917287467764657573962413890865832645995813390478027590099465764078951269468398352595709825822620522489407726719478268482601476990902640136394437455305068203496252451749399651431429809190659250937221696461515709858387410597885959772975498930161753928468138268683868942774155991855925245953959431049972524680845987273644695848653836736222626099124608051243884390451244136549762780797715691435997700129616089441694868555848406353422072225828488648158456028506016842739452267467678895252138522549954666727823986456596116354886230577456498035593634568174324112515076069479451096596094025228879710893145669136867228748940560101503308617928680920874760917824938589009714909675985261365549781893129784821682998948722658804857564014270477555132379641451523746234364542858444795265867821051141354735739523113427166102135969536231442952484937187110145765403590279934403742007310578539062198387447808478489683321445713868751943506430218453191048481005370614680674919278191197939952061419663428754440643745123718192179998391015919561814675142691239748940907186494231961567945208095146550225231603881930142093762137855956638937787083039069792077346722182562599661501421503068038447734549202605414665925201497442850732518666002132434088190710486331734649651453905796268561005508106658796998163574736384052571459102897064140110971206280439039759515677157700420337869936007230558763176359421873125147120532928191826186125867321579198414848829164470609575270695722091756711672291098169091528017350671274858322287183520935396572512108357915136988209144421006751033467110314126711136990865851639831501970165151168517143765761835155650884909989859982387345528331635507647918535893226185489632132933089857064204675259070915481416549859461637180
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect
new file mode 100644
index 0000000000..e4396ac6fe
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect-noinput
new file mode 100644
index 0000000000..e4396ac6fe
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect
new file mode 100644
index 0000000000..e4396ac6fe
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect-noinput
new file mode 100644
index 0000000000..e4396ac6fe
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-pi.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect
new file mode 100644
index 0000000000..09dc798ee3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect-noinput
new file mode 100644
index 0000000000..e45583ee31
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.golden
new file mode 100644
index 0000000000..09dc798ee3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.in
new file mode 100644
index 0000000000..ce038ebb5b
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.in
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect
new file mode 100644
index 0000000000..09dc798ee3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect-noinput
new file mode 100644
index 0000000000..0c24742fde
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect
new file mode 100644
index 0000000000..09dc798ee3
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect-noinput
new file mode 100644
index 0000000000..0c24742fde
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-1k.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect-noinput
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.golden
new file mode 100644
index 0000000000..9ca0eb1ce2
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.in
new file mode 100644
index 0000000000..fb5b1be619
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.in
@@ -0,0 +1,4 @@
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+���vH
+��%������ ��ɷ���}��>���ls���m�IGH���1Y�4�[��	0[|]o#�
+�-#���ul���pf��ٱ�n�Y�ԀY�w�C8ɯ02� F=gn�r�N!O���{����k�*�w(��b� ��kQC9/��lu>�5�C.��u��
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect-noinput
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect-noinput
new file mode 100644
index 0000000000..881e59c9ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-limit.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.golden
new file mode 100644
index 0000000000..47d53c89c0
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.in
new file mode 100644
index 0000000000..8418633d2a
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-rand-max.in
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect
new file mode 100644
index 0000000000..9ad731f3cf
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect-noinput
new file mode 100644
index 0000000000..9ad731f3cf
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.golden
new file mode 100644
index 0000000000..f5133778e1
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.in
new file mode 100644
index 0000000000..7c7a50d158
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.in
@@ -0,0 +1,2 @@
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+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect
new file mode 100644
index 0000000000..7812c1c62d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect-noinput
new file mode 100644
index 0000000000..7812c1c62d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect
new file mode 100644
index 0000000000..7812c1c62d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect-noinput
new file mode 100644
index 0000000000..7812c1c62d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-shifts.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect
new file mode 100644
index 0000000000..486bdf6f69
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect
@@ -0,0 +1 @@
+��J�0���!�<(l�P*(�:�s�覂�Д4aI�%|SV��xO&�U>�7�C�qM�u��d29ߨ�x�s�޷�$�� Qi^�t
+�wU�͊�;���C����C�Zf��ȥ6�J���v�Զ�Xdp�j
+�(����]��^v8:K��dH�@�>.��3�SAJ��.3�{�;��5F吒oJ�Y6ϯ�˛��������l�_���?�����8�d
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect-noinput
new file mode 100644
index 0000000000..486bdf6f69
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.dyn.expect-noinput
@@ -0,0 +1 @@
+��J�0���!�<(l�P*(�:�s�覂�Д4aI�%|SV��xO&�U>�7�C�qM�u��d29ߨ�x�s�޷�$�� Qi^�t
+�wU�͊�;���C����C�Zf��ȥ6�J���v�Զ�Xdp�j
+�(����]��^v8:K��dH�@�>.��3�SAJ��.3�{�;��5F吒oJ�Y6ϯ�˛��������l�_���?�����8�d
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.golden
new file mode 100644
index 0000000000..ff023114bb
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.in
new file mode 100644
index 0000000000..cc5c3ad69d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.in
@@ -0,0 +1,14 @@
+//Copyright2009ThGoAuthor.Allrightrrvd.
+//UofthiourccodigovrndbyBSD-tyl
+//licnthtcnbfoundinthLICENSEfil.
+
+pckgmin
+
+import"o"
+
+funcmin(){
+	vrb=mk([]byt,65535)
+	f,_:=o.Crt("huffmn-null-mx.in")
+	f.Writ(b)
+}
+ABCDEFGHIJKLMNOPQRSTUVXxyz!"#¤%&/?"
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect
new file mode 100644
index 0000000000..71ce3aeb75
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect-noinput
new file mode 100644
index 0000000000..71ce3aeb75
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect
new file mode 100644
index 0000000000..71ce3aeb75
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect-noinput
new file mode 100644
index 0000000000..71ce3aeb75
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text-shift.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect
new file mode 100644
index 0000000000..b9cc20d0eb
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect
@@ -0,0 +1,4 @@
+���J�0���r=�`K��2Aasē)�H�����Iɟb�]�k��y�{h�0E{6�6�[��c��db�;��"%�#u����["�llB
+%*�
+�&��H�S�v����a���h�9��'B62CI���C��G6�����t���g�
+R]��K�m�!Č*�ꚺx5[��g�QF�ء��?>�)�
+7���풳�^�w;�$�d��2E�^��/έ{�-���x�6S�.9���
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect-noinput
new file mode 100644
index 0000000000..b9cc20d0eb
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.dyn.expect-noinput
@@ -0,0 +1,4 @@
+���J�0���r=�`K��2Aasē)�H�����Iɟb�]�k��y�{h�0E{6�6�[��c��db�;��"%�#u����["�llB
+%*�
+�&��H�S�v����a���h�9��'B62CI���C��G6�����t���g�
+R]��K�m�!Č*�ꚺx5[��g�QF�ء��?>�)�
+7���풳�^�w;�$�d��2E�^��/έ{�-���x�6S�.9���
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.golden
new file mode 100644
index 0000000000..6d34c61fe0
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.golden
@@ -0,0 +1,3 @@
+�AK�0��x�ß�Z���LP�a�!�x��AD��I�&#I�E�����p]�Lƿ���F�p��	1�88�h��$���5S��-	�F66!�)v�.��0�Y�������&��	S���N|d�2:��
+t�|둍���xz9������骺�����Ɏ�3��
+&&=������ô�UD�=Fu���]��q����UL+�����>FQY��LZ��o���fTߵ�EŴ��{�Yʶb�e�
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.in
new file mode 100644
index 0000000000..73398b98b5
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.in
@@ -0,0 +1,13 @@
+// Copyright 2009 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 main
+
+import "os"
+
+func main() {
+	var b = make([]byte, 65535)
+	f, _ := os.Create("huffman-null-max.in")
+	f.Write(b)
+}
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect
new file mode 100644
index 0000000000..d448727c32
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect
@@ -0,0 +1 @@
+�_K�0������`K��0Aasě)^�H�����Iɟb߻��_>�4
+a��=����-^
+�1`_�	1	���	�ő:�Y��-�F66!�A��`�a��C;A����Nyr4ߜU�!���GKС��#�����r:B[G�3��.�L��׶�bFRuM]���^⇳�(#Z������i�����v��B����B�H2S]��u/���ֽ��W�T�G��n���r�
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect-noinput
new file mode 100644
index 0000000000..d448727c32
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.sync.expect-noinput
@@ -0,0 +1 @@
+�_K�0������`K��0Aasě)^�H�����Iɟb߻��_>�4
+a��=����-^
+�1`_�	1	���	�ő:�Y��-�F66!�A��`�a��C;A����Nyr4ߜU�!���GKС��#�����r:B[G�3��.�L��׶�bFRuM]���^⇳�(#Z������i�����v��B����B�H2S]��u/���ֽ��W�T�G��n���r�
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect
new file mode 100644
index 0000000000..d448727c32
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect
@@ -0,0 +1 @@
+�_K�0������`K��0Aasě)^�H�����Iɟb߻��_>�4
+a��=����-^
+�1`_�	1	���	�ő:�Y��-�F66!�A��`�a��C;A����Nyr4ߜU�!���GKС��#�����r:B[G�3��.�L��׶�bFRuM]���^⇳�(#Z������i�����v��B����B�H2S]��u/���ֽ��W�T�G��n���r�
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect-noinput
new file mode 100644
index 0000000000..d448727c32
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-text.wb.expect-noinput
@@ -0,0 +1 @@
+�_K�0������`K��0Aasě)^�H�����Iɟb߻��_>�4
+a��=����-^
+�1`_�	1	���	�ő:�Y��-�F66!�A��`�a��C;A����Nyr4ߜU�!���GKС��#�����r:B[G�3��.�L��׶�bFRuM]���^⇳�(#Z������i�����v��B����B�H2S]��u/���ֽ��W�T�G��n���r�
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect-noinput
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.golden b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.golden
new file mode 100644
index 0000000000..5abdbaff9a
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.golden
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.in b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.in
new file mode 100644
index 0000000000..349be0e6ec
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.in
@@ -0,0 +1 @@
+00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+\ No newline at end of file
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect-noinput
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect-noinput
new file mode 100644
index 0000000000..dbe401c54c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/huffman-zero.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.dyn.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.dyn.expect-noinput
new file mode 100644
index 0000000000..62d55e6b83
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.dyn.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.sync.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.sync.expect-noinput
new file mode 100644
index 0000000000..8b92d9fc20
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.sync.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.wb.expect-noinput b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.wb.expect-noinput
new file mode 100644
index 0000000000..8b92d9fc20
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/null-long-match.wb.expect-noinput
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/regression.zip b/vendor/github.com/klauspost/compress/flate/testdata/regression.zip
new file mode 100644
index 0000000000..73cf84036d
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/regression.zip
diff --git a/vendor/github.com/klauspost/compress/flate/testdata/tokens.bin b/vendor/github.com/klauspost/compress/flate/testdata/tokens.bin
new file mode 100644
index 0000000000..b93c6968ab
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/testdata/tokens.bin
@@ -0,0 +1,63 @@
+<mediawiki xmlns="http://www.����.org/xml/export-0.3/"����:xsi����w3����2001/XMLSchema-instance" xsi:s����Location�� ����.xsd" version="0.3����:lang="en">
+  <siteinfo>
+  ����name>Wikip����</��������base>끀�en.����������������/Main_Page</��������generator>MediaWiki 1.6alpha</��������c����first-letter</��������  <����spaces���� key="-2"退�</��������1">Special����0" /ɀ��1">Talkŀ��2">User����3���� t؀��4">܂������݀��5���� �6">Image����7����ڀ��8������������9���� �10">Template �1Ӄ������ �2">Helpހ��3����ڀ��4">Category����5���� �00">Port����101��������À��s����҈������<pag����<title>AaA</��������id>1</id����reviԉ����������32899315����΀��mestamp>2005-12-27T18:46:47Z　�����؀��  <contribu��������<user����Jsmethers</��������id>614213����쁀�Ӏ��<text xml:É��="preserve">#REDIRECT [[AAA]]</����怀�</����</����Â��lgeriA぀�҂��������������ǂ��18063769������ǂ��07-03T11:13:13Z　�ǂ��Docu��802��������minor����comment>adding cur_id=5: {{R from CamelCase}}Ҁ��������������Ԃ��a]]Ԁ������mericanSamoaɂ������6��������9ԃ��ˁ����������4:1��������to����6  ۂ������݂�� ނ������ppliedEthics����8����5898943��������2-02-25T15:43:11����ip>Con���� script</i䉀�І��Automated cԀ�������������� ethics]]
+����ccessibleComputing����10����������������3-04����22:18:38Z䀀�艀�Ams80����75��������Fixing redirect��������̂��_c͂����d������������ꉀ�����9-22T16:02:5����ndre Engels����300��������ך��ɏ��da programming ����uage邀�narchism�2Á������4213683�����6-����T01:41:25�CJames7߆��삀�83238����Α������菀�/* ����t Communism */  too many bracketsـ������{{ր��m}}
+'''倀�m''' origin����as a term of abuse ���� us����gainst early [[work����class]] [[radical]]s includ����the [[Digger����of����English Revolution]] and����sans-culotte|''����s''Ȁ��Frencǀ��.[Ο��uk.encarta.msn.com/encyclop����_761568770/����.html] Whilst��������is still����in a pejorative way󏀂describe ''&quot;any act thaƂ��violent means����troy退�organiz��������societyˀ��''&lt;ref&gt;����www.cas.sc.edu/socy/faculty/deflem/zhistorintpol����၀� History of Int��������al Police Coopeށ��on],𔀆����final protocols������������Ȁ��Conference����Rome for����Social Defense Aۄ������ts����, 1898&lt;/����, it h����lso been taken up ���� posi����label by self-definŅ��惀�ts.
+
+The word '''��������is [[etymology|derived����]]����[[Greek����|Greek]] ''[[Wik����ary:&amp;#945;����57;����61����6����3����45;|����ƀ��]]'' (����without [[��������s (ruler, chief, king)����).����m����[[polit���� philosophy]], is����belief����''ـ��s'' are unne𑀂ary񇀄should be abo����ed, althoughބ��re����differՈ��i����pret����s߄��wha����isچ����������refer񆀄rel�[[s����move����]]s)����advƩ��e���� elimi����耀�authoritarian institu�s, particul��������[[state]].Ņ������쨀�����e쨀�D����iЀ��_of_����m����������������] on WȀ��, a����ed 2006�������� ����Ճ��[[À����������ۃ��most܀��ts ����it, does not imply [[chaos]], [[nihilism]], orԄ��nomie]], but raă�� a harmoniou����anti-͂��]]򉀊. In pla����ۃ������regardǇ��s��������structures܄��coercive eco����c����Ƃ��ts��������al����؃�� ����d upon [[����nt����s������������autonom߁��individuals, [[mutual aid��������[[����gov����nce]]. љ��
+����e������������easily ̉��by����it is����܀��ԃ��с������offer�����������they����ve to���� truly fre��������However, ide����b����how an����t����ety might턀�k v臀�considerably, es����ly ���� r����t��������s; ����e����ǁ��disagre����������������be brou��������. 
+
+== O푀�����predecessors ==
+
+[[Peter Kropotkin|��������o����s, argu����a退�fo����corded [[����ory����human���� was⏀�ed o����principles.叀���������.쐀�[[M䄀�Aid: A Factor����E������������'', 1902.����M����thropolog��follow����������������拀�v��������hunter-ga����er bands wƃ��egal��������lʕ��d di��������l����r����umu����d we����ֈ��decree����w兀�d had eq׆��󉀄����resourcȂ��Friedrich����|��������Frei����ʂ������arx��������ن��ve/����/܅��s/1884/o؄��-family/index撀���������Fami����Privތ��Property,��������S��������884Ɂ��ċ��
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+
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diff --git a/vendor/github.com/klauspost/compress/flate/token.go b/vendor/github.com/klauspost/compress/flate/token.go
new file mode 100644
index 0000000000..d818790c13
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/token.go
@@ -0,0 +1,379 @@
+// Copyright 2009 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 flate
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	// bits 0-16  	xoffset = offset - MIN_OFFSET_SIZE, or literal - 16 bits
+	// bits 16-22	offsetcode - 5 bits
+	// bits 22-30   xlength = length - MIN_MATCH_LENGTH - 8 bits
+	// bits 30-32   type   0 = literal  1=EOF  2=Match   3=Unused - 2 bits
+	lengthShift         = 22
+	offsetMask          = 1<<lengthShift - 1
+	typeMask            = 3 << 30
+	literalType         = 0 << 30
+	matchType           = 1 << 30
+	matchOffsetOnlyMask = 0xffff
+)
+
+// The length code for length X (MIN_MATCH_LENGTH <= X <= MAX_MATCH_LENGTH)
+// is lengthCodes[length - MIN_MATCH_LENGTH]
+var lengthCodes = [256]uint8{
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
+	9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
+	13, 13, 13, 13, 14, 14, 14, 14, 15, 15,
+	15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
+	17, 17, 17, 17, 17, 17, 17, 17, 18, 18,
+	18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
+	19, 19, 19, 19, 20, 20, 20, 20, 20, 20,
+	20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+	21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+	21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
+	22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+	22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+	23, 23, 23, 23, 23, 23, 23, 23, 24, 24,
+	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+	24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 28,
+}
+
+// lengthCodes1 is length codes, but starting at 1.
+var lengthCodes1 = [256]uint8{
+	1, 2, 3, 4, 5, 6, 7, 8, 9, 9,
+	10, 10, 11, 11, 12, 12, 13, 13, 13, 13,
+	14, 14, 14, 14, 15, 15, 15, 15, 16, 16,
+	16, 16, 17, 17, 17, 17, 17, 17, 17, 17,
+	18, 18, 18, 18, 18, 18, 18, 18, 19, 19,
+	19, 19, 19, 19, 19, 19, 20, 20, 20, 20,
+	20, 20, 20, 20, 21, 21, 21, 21, 21, 21,
+	21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+	22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+	22, 22, 22, 22, 22, 22, 23, 23, 23, 23,
+	23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
+	23, 23, 24, 24, 24, 24, 24, 24, 24, 24,
+	24, 24, 24, 24, 24, 24, 24, 24, 25, 25,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 29,
+}
+
+var offsetCodes = [256]uint32{
+	0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
+	8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
+	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+	11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+	12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+	12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+	13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+	13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+	14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+	15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+}
+
+// offsetCodes14 are offsetCodes, but with 14 added.
+var offsetCodes14 = [256]uint32{
+	14, 15, 16, 17, 18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21,
+	22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+	24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+	25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+	29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+	29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+	29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+	29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+}
+
+type token uint32
+
+type tokens struct {
+	extraHist [32]uint16  // codes 256->maxnumlit
+	offHist   [32]uint16  // offset codes
+	litHist   [256]uint16 // codes 0->255
+	nFilled   int
+	n         uint16 // Must be able to contain maxStoreBlockSize
+	tokens    [maxStoreBlockSize + 1]token
+}
+
+func (t *tokens) Reset() {
+	if t.n == 0 {
+		return
+	}
+	t.n = 0
+	t.nFilled = 0
+	for i := range t.litHist[:] {
+		t.litHist[i] = 0
+	}
+	for i := range t.extraHist[:] {
+		t.extraHist[i] = 0
+	}
+	for i := range t.offHist[:] {
+		t.offHist[i] = 0
+	}
+}
+
+func (t *tokens) Fill() {
+	if t.n == 0 {
+		return
+	}
+	for i, v := range t.litHist[:] {
+		if v == 0 {
+			t.litHist[i] = 1
+			t.nFilled++
+		}
+	}
+	for i, v := range t.extraHist[:literalCount-256] {
+		if v == 0 {
+			t.nFilled++
+			t.extraHist[i] = 1
+		}
+	}
+	for i, v := range t.offHist[:offsetCodeCount] {
+		if v == 0 {
+			t.offHist[i] = 1
+		}
+	}
+}
+
+func indexTokens(in []token) tokens {
+	var t tokens
+	t.indexTokens(in)
+	return t
+}
+
+func (t *tokens) indexTokens(in []token) {
+	t.Reset()
+	for _, tok := range in {
+		if tok < matchType {
+			t.AddLiteral(tok.literal())
+			continue
+		}
+		t.AddMatch(uint32(tok.length()), tok.offset()&matchOffsetOnlyMask)
+	}
+}
+
+// emitLiteral writes a literal chunk and returns the number of bytes written.
+func emitLiteral(dst *tokens, lit []byte) {
+	for _, v := range lit {
+		dst.tokens[dst.n] = token(v)
+		dst.litHist[v]++
+		dst.n++
+	}
+}
+
+func (t *tokens) AddLiteral(lit byte) {
+	t.tokens[t.n] = token(lit)
+	t.litHist[lit]++
+	t.n++
+}
+
+// from https://stackoverflow.com/a/28730362
+func mFastLog2(val float32) float32 {
+	ux := int32(math.Float32bits(val))
+	log2 := (float32)(((ux >> 23) & 255) - 128)
+	ux &= -0x7f800001
+	ux += 127 << 23
+	uval := math.Float32frombits(uint32(ux))
+	log2 += ((-0.34484843)*uval+2.02466578)*uval - 0.67487759
+	return log2
+}
+
+// EstimatedBits will return an minimum size estimated by an *optimal*
+// compression of the block.
+// The size of the block
+func (t *tokens) EstimatedBits() int {
+	shannon := float32(0)
+	bits := int(0)
+	nMatches := 0
+	total := int(t.n) + t.nFilled
+	if total > 0 {
+		invTotal := 1.0 / float32(total)
+		for _, v := range t.litHist[:] {
+			if v > 0 {
+				n := float32(v)
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
+			}
+		}
+		// Just add 15 for EOB
+		shannon += 15
+		for i, v := range t.extraHist[1 : literalCount-256] {
+			if v > 0 {
+				n := float32(v)
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
+				bits += int(lengthExtraBits[i&31]) * int(v)
+				nMatches += int(v)
+			}
+		}
+	}
+	if nMatches > 0 {
+		invTotal := 1.0 / float32(nMatches)
+		for i, v := range t.offHist[:offsetCodeCount] {
+			if v > 0 {
+				n := float32(v)
+				shannon += atLeastOne(-mFastLog2(n*invTotal)) * n
+				bits += int(offsetExtraBits[i&31]) * int(v)
+			}
+		}
+	}
+	return int(shannon) + bits
+}
+
+// AddMatch adds a match to the tokens.
+// This function is very sensitive to inlining and right on the border.
+func (t *tokens) AddMatch(xlength uint32, xoffset uint32) {
+	if debugDeflate {
+		if xlength >= maxMatchLength+baseMatchLength {
+			panic(fmt.Errorf("invalid length: %v", xlength))
+		}
+		if xoffset >= maxMatchOffset+baseMatchOffset {
+			panic(fmt.Errorf("invalid offset: %v", xoffset))
+		}
+	}
+	oCode := offsetCode(xoffset)
+	xoffset |= oCode << 16
+
+	t.extraHist[lengthCodes1[uint8(xlength)]]++
+	t.offHist[oCode&31]++
+	t.tokens[t.n] = token(matchType | xlength<<lengthShift | xoffset)
+	t.n++
+}
+
+// AddMatchLong adds a match to the tokens, potentially longer than max match length.
+// Length should NOT have the base subtracted, only offset should.
+func (t *tokens) AddMatchLong(xlength int32, xoffset uint32) {
+	if debugDeflate {
+		if xoffset >= maxMatchOffset+baseMatchOffset {
+			panic(fmt.Errorf("invalid offset: %v", xoffset))
+		}
+	}
+	oc := offsetCode(xoffset)
+	xoffset |= oc << 16
+	for xlength > 0 {
+		xl := xlength
+		if xl > 258 {
+			// We need to have at least baseMatchLength left over for next loop.
+			if xl > 258+baseMatchLength {
+				xl = 258
+			} else {
+				xl = 258 - baseMatchLength
+			}
+		}
+		xlength -= xl
+		xl -= baseMatchLength
+		t.extraHist[lengthCodes1[uint8(xl)]]++
+		t.offHist[oc&31]++
+		t.tokens[t.n] = token(matchType | uint32(xl)<<lengthShift | xoffset)
+		t.n++
+	}
+}
+
+func (t *tokens) AddEOB() {
+	t.tokens[t.n] = token(endBlockMarker)
+	t.extraHist[0]++
+	t.n++
+}
+
+func (t *tokens) Slice() []token {
+	return t.tokens[:t.n]
+}
+
+// VarInt returns the tokens as varint encoded bytes.
+func (t *tokens) VarInt() []byte {
+	var b = make([]byte, binary.MaxVarintLen32*int(t.n))
+	var off int
+	for _, v := range t.tokens[:t.n] {
+		off += binary.PutUvarint(b[off:], uint64(v))
+	}
+	return b[:off]
+}
+
+// FromVarInt restores t to the varint encoded tokens provided.
+// Any data in t is removed.
+func (t *tokens) FromVarInt(b []byte) error {
+	var buf = bytes.NewReader(b)
+	var toks []token
+	for {
+		r, err := binary.ReadUvarint(buf)
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+		toks = append(toks, token(r))
+	}
+	t.indexTokens(toks)
+	return nil
+}
+
+// Returns the type of a token
+func (t token) typ() uint32 { return uint32(t) & typeMask }
+
+// Returns the literal of a literal token
+func (t token) literal() uint8 { return uint8(t) }
+
+// Returns the extra offset of a match token
+func (t token) offset() uint32 { return uint32(t) & offsetMask }
+
+func (t token) length() uint8 { return uint8(t >> lengthShift) }
+
+// Convert length to code.
+func lengthCode(len uint8) uint8 { return lengthCodes[len] }
+
+// Returns the offset code corresponding to a specific offset
+func offsetCode(off uint32) uint32 {
+	if false {
+		if off < uint32(len(offsetCodes)) {
+			return offsetCodes[off&255]
+		} else if off>>7 < uint32(len(offsetCodes)) {
+			return offsetCodes[(off>>7)&255] + 14
+		} else {
+			return offsetCodes[(off>>14)&255] + 28
+		}
+	}
+	if off < uint32(len(offsetCodes)) {
+		return offsetCodes[uint8(off)]
+	}
+	return offsetCodes14[uint8(off>>7)]
+}
diff --git a/vendor/github.com/klauspost/compress/flate/token_test.go b/vendor/github.com/klauspost/compress/flate/token_test.go
new file mode 100644
index 0000000000..f6346259e8
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/token_test.go
@@ -0,0 +1,54 @@
+package flate
+
+import (
+	"bytes"
+	"os"
+	"testing"
+)
+
+type testFatal interface {
+	Fatal(args ...interface{})
+}
+
+// loadTestTokens will load test tokens.
+// First block from enwik9, varint encoded.
+func loadTestTokens(t testFatal) *tokens {
+	b, err := os.ReadFile("testdata/tokens.bin")
+	if err != nil {
+		t.Fatal(err)
+	}
+	var tokens tokens
+	err = tokens.FromVarInt(b)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return &tokens
+}
+
+func Test_tokens_EstimatedBits(t *testing.T) {
+	tok := loadTestTokens(t)
+	// The estimated size, update if method changes.
+	const expect = 221057
+	n := tok.EstimatedBits()
+	var buf bytes.Buffer
+	wr := newHuffmanBitWriter(&buf)
+	wr.writeBlockDynamic(tok, true, nil, true)
+	if wr.err != nil {
+		t.Fatal(wr.err)
+	}
+	wr.flush()
+	t.Log("got:", n, "actual:", buf.Len()*8, "(header not part of estimate)")
+	if n != expect {
+		t.Error("want:", expect, "bits, got:", n)
+	}
+}
+
+func Benchmark_tokens_EstimatedBits(b *testing.B) {
+	tok := loadTestTokens(b)
+	b.ResetTimer()
+	// One "byte", one token iteration.
+	b.SetBytes(1)
+	for i := 0; i < b.N; i++ {
+		_ = tok.EstimatedBits()
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/flate/writer_test.go b/vendor/github.com/klauspost/compress/flate/writer_test.go
new file mode 100644
index 0000000000..0a011a9220
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/writer_test.go
@@ -0,0 +1,541 @@
+// Copyright 2012 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 flate
+
+import (
+	"archive/zip"
+	"bytes"
+	"compress/flate"
+	"fmt"
+	"io"
+	"math"
+	"math/rand"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestWriterMemUsage(t *testing.T) {
+	testMem := func(t *testing.T, fn func()) {
+		var before, after runtime.MemStats
+		runtime.GC()
+		runtime.ReadMemStats(&before)
+		fn()
+		runtime.GC()
+		runtime.ReadMemStats(&after)
+		t.Logf("%s: Memory Used: %dKB, %d allocs", t.Name(), (after.HeapInuse-before.HeapInuse)/1024, after.HeapObjects-before.HeapObjects)
+	}
+	data := make([]byte, 100000)
+	t.Run(fmt.Sprint("stateless"), func(t *testing.T) {
+		testMem(t, func() {
+			StatelessDeflate(io.Discard, data, false, nil)
+		})
+	})
+	for level := HuffmanOnly; level <= BestCompression; level++ {
+		t.Run(fmt.Sprint("level-", level), func(t *testing.T) {
+			var zr *Writer
+			var err error
+			testMem(t, func() {
+				zr, err = NewWriter(io.Discard, level)
+				if err != nil {
+					t.Fatal(err)
+				}
+				zr.Write(data)
+			})
+			zr.Close()
+		})
+	}
+	for level := HuffmanOnly; level <= BestCompression; level++ {
+		t.Run(fmt.Sprint("stdlib-", level), func(t *testing.T) {
+			var zr *flate.Writer
+			var err error
+			testMem(t, func() {
+				zr, err = flate.NewWriter(io.Discard, level)
+				if err != nil {
+					t.Fatal(err)
+				}
+				zr.Write(data)
+			})
+			zr.Close()
+		})
+	}
+}
+
+func TestWriterRegression(t *testing.T) {
+	data, err := os.ReadFile("testdata/regression.zip")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for level := HuffmanOnly; level <= BestCompression; level++ {
+		t.Run(fmt.Sprint("level_", level), func(t *testing.T) {
+			zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			for _, tt := range zr.File {
+				if !strings.HasSuffix(t.Name(), "") {
+					continue
+				}
+
+				t.Run(tt.Name, func(t *testing.T) {
+					if testing.Short() && tt.FileInfo().Size() > 10000 {
+						t.SkipNow()
+					}
+					r, err := tt.Open()
+					if err != nil {
+						t.Error(err)
+						return
+					}
+					in, err := io.ReadAll(r)
+					if err != nil {
+						t.Error(err)
+					}
+					msg := "level " + strconv.Itoa(level) + ":"
+					buf := new(bytes.Buffer)
+					fw, err := NewWriter(buf, level)
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					n, err := fw.Write(in)
+					if n != len(in) {
+						t.Fatal(msg + "short write")
+					}
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					err = fw.Close()
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					fr1 := NewReader(buf)
+					data2, err := io.ReadAll(fr1)
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					if !bytes.Equal(in, data2) {
+						t.Fatal(msg + "not equal")
+					}
+					// Do it again...
+					msg = "level " + strconv.Itoa(level) + " (reset):"
+					buf.Reset()
+					fw.Reset(buf)
+					n, err = fw.Write(in)
+					if n != len(in) {
+						t.Fatal(msg + "short write")
+					}
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					err = fw.Close()
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					fr1 = NewReader(buf)
+					data2, err = io.ReadAll(fr1)
+					if err != nil {
+						t.Fatal(msg + err.Error())
+					}
+					if !bytes.Equal(in, data2) {
+						t.Fatal(msg + "not equal")
+					}
+				})
+			}
+		})
+	}
+}
+
+func benchmarkEncoder(b *testing.B, testfile, level, n int) {
+	b.SetBytes(int64(n))
+	buf0, err := os.ReadFile(testfiles[testfile])
+	if err != nil {
+		b.Fatal(err)
+	}
+	if len(buf0) == 0 {
+		b.Fatalf("test file %q has no data", testfiles[testfile])
+	}
+	buf1 := make([]byte, n)
+	for i := 0; i < n; i += len(buf0) {
+		if len(buf0) > n-i {
+			buf0 = buf0[:n-i]
+		}
+		copy(buf1[i:], buf0)
+	}
+	buf0 = nil
+	runtime.GC()
+	w, err := NewWriter(io.Discard, level)
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		w.Reset(io.Discard)
+		_, err = w.Write(buf1)
+		if err != nil {
+			b.Fatal(err)
+		}
+		err = w.Close()
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkEncodeDigitsConstant1e4(b *testing.B) { benchmarkEncoder(b, digits, constant, 1e4) }
+func BenchmarkEncodeDigitsConstant1e5(b *testing.B) { benchmarkEncoder(b, digits, constant, 1e5) }
+func BenchmarkEncodeDigitsConstant1e6(b *testing.B) { benchmarkEncoder(b, digits, constant, 1e6) }
+func BenchmarkEncodeDigitsSpeed1e4(b *testing.B)    { benchmarkEncoder(b, digits, speed, 1e4) }
+func BenchmarkEncodeDigitsSpeed1e5(b *testing.B)    { benchmarkEncoder(b, digits, speed, 1e5) }
+func BenchmarkEncodeDigitsSpeed1e6(b *testing.B)    { benchmarkEncoder(b, digits, speed, 1e6) }
+func BenchmarkEncodeDigitsDefault1e4(b *testing.B)  { benchmarkEncoder(b, digits, default_, 1e4) }
+func BenchmarkEncodeDigitsDefault1e5(b *testing.B)  { benchmarkEncoder(b, digits, default_, 1e5) }
+func BenchmarkEncodeDigitsDefault1e6(b *testing.B)  { benchmarkEncoder(b, digits, default_, 1e6) }
+func BenchmarkEncodeDigitsCompress1e4(b *testing.B) { benchmarkEncoder(b, digits, compress, 1e4) }
+func BenchmarkEncodeDigitsCompress1e5(b *testing.B) { benchmarkEncoder(b, digits, compress, 1e5) }
+func BenchmarkEncodeDigitsCompress1e6(b *testing.B) { benchmarkEncoder(b, digits, compress, 1e6) }
+func BenchmarkEncodeDigitsSL1e4(b *testing.B)       { benchmarkStatelessEncoder(b, digits, 1e4) }
+func BenchmarkEncodeDigitsSL1e5(b *testing.B)       { benchmarkStatelessEncoder(b, digits, 1e5) }
+func BenchmarkEncodeDigitsSL1e6(b *testing.B)       { benchmarkStatelessEncoder(b, digits, 1e6) }
+func BenchmarkEncodeTwainConstant1e4(b *testing.B)  { benchmarkEncoder(b, twain, constant, 1e4) }
+func BenchmarkEncodeTwainConstant1e5(b *testing.B)  { benchmarkEncoder(b, twain, constant, 1e5) }
+func BenchmarkEncodeTwainConstant1e6(b *testing.B)  { benchmarkEncoder(b, twain, constant, 1e6) }
+func BenchmarkEncodeTwainSpeed1e4(b *testing.B)     { benchmarkEncoder(b, twain, speed, 1e4) }
+func BenchmarkEncodeTwainSpeed1e5(b *testing.B)     { benchmarkEncoder(b, twain, speed, 1e5) }
+func BenchmarkEncodeTwainSpeed1e6(b *testing.B)     { benchmarkEncoder(b, twain, speed, 1e6) }
+func BenchmarkEncodeTwainDefault1e4(b *testing.B)   { benchmarkEncoder(b, twain, default_, 1e4) }
+func BenchmarkEncodeTwainDefault1e5(b *testing.B)   { benchmarkEncoder(b, twain, default_, 1e5) }
+func BenchmarkEncodeTwainDefault1e6(b *testing.B)   { benchmarkEncoder(b, twain, default_, 1e6) }
+func BenchmarkEncodeTwainCompress1e4(b *testing.B)  { benchmarkEncoder(b, twain, compress, 1e4) }
+func BenchmarkEncodeTwainCompress1e5(b *testing.B)  { benchmarkEncoder(b, twain, compress, 1e5) }
+func BenchmarkEncodeTwainCompress1e6(b *testing.B)  { benchmarkEncoder(b, twain, compress, 1e6) }
+func BenchmarkEncodeTwainSL1e4(b *testing.B)        { benchmarkStatelessEncoder(b, twain, 1e4) }
+func BenchmarkEncodeTwainSL1e5(b *testing.B)        { benchmarkStatelessEncoder(b, twain, 1e5) }
+func BenchmarkEncodeTwainSL1e6(b *testing.B)        { benchmarkStatelessEncoder(b, twain, 1e6) }
+
+func benchmarkStatelessEncoder(b *testing.B, testfile, n int) {
+	b.SetBytes(int64(n))
+	buf0, err := os.ReadFile(testfiles[testfile])
+	if err != nil {
+		b.Fatal(err)
+	}
+	if len(buf0) == 0 {
+		b.Fatalf("test file %q has no data", testfiles[testfile])
+	}
+	buf1 := make([]byte, n)
+	for i := 0; i < n; i += len(buf0) {
+		if len(buf0) > n-i {
+			buf0 = buf0[:n-i]
+		}
+		copy(buf1[i:], buf0)
+	}
+	buf0 = nil
+	runtime.GC()
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		w := NewStatelessWriter(io.Discard)
+		_, err = w.Write(buf1)
+		if err != nil {
+			b.Fatal(err)
+		}
+		err = w.Close()
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+// A writer that fails after N writes.
+type errorWriter struct {
+	N int
+}
+
+func (e *errorWriter) Write(b []byte) (int, error) {
+	if e.N <= 0 {
+		return 0, io.ErrClosedPipe
+	}
+	e.N--
+	return len(b), nil
+}
+
+// Test if errors from the underlying writer is passed upwards.
+func TestWriteError(t *testing.T) {
+	buf := new(bytes.Buffer)
+	n := 65536
+	if !testing.Short() {
+		n *= 4
+	}
+	for i := 0; i < n; i++ {
+		fmt.Fprintf(buf, "asdasfasf%d%dfghfgujyut%dyutyu\n", i, i, i)
+	}
+	in := buf.Bytes()
+	// We create our own buffer to control number of writes.
+	copyBuf := make([]byte, 128)
+	for l := 0; l < 10; l++ {
+		for fail := 1; fail <= 256; fail *= 2 {
+			// Fail after 'fail' writes
+			ew := &errorWriter{N: fail}
+			w, err := NewWriter(ew, l)
+			if err != nil {
+				t.Fatalf("NewWriter: level %d: %v", l, err)
+			}
+			n, err := copyBuffer(w, bytes.NewBuffer(in), copyBuf)
+			if err == nil {
+				t.Fatalf("Level %d: Expected an error, writer was %#v", l, ew)
+			}
+			n2, err := w.Write([]byte{1, 2, 2, 3, 4, 5})
+			if n2 != 0 {
+				t.Fatal("Level", l, "Expected 0 length write, got", n)
+			}
+			if err == nil {
+				t.Fatal("Level", l, "Expected an error")
+			}
+			err = w.Flush()
+			if err == nil {
+				t.Fatal("Level", l, "Expected an error on flush")
+			}
+			err = w.Close()
+			if err == nil {
+				t.Fatal("Level", l, "Expected an error on close")
+			}
+
+			w.Reset(io.Discard)
+			n2, err = w.Write([]byte{1, 2, 3, 4, 5, 6})
+			if err != nil {
+				t.Fatal("Level", l, "Got unexpected error after reset:", err)
+			}
+			if n2 == 0 {
+				t.Fatal("Level", l, "Got 0 length write, expected > 0")
+			}
+			if testing.Short() {
+				return
+			}
+		}
+	}
+}
+
+// Test if errors from the underlying writer is passed upwards.
+func TestWriter_Reset(t *testing.T) {
+	buf := new(bytes.Buffer)
+	n := 65536
+	if !testing.Short() {
+		n *= 4
+	}
+	for i := 0; i < n; i++ {
+		fmt.Fprintf(buf, "asdasfasf%d%dfghfgujyut%dyutyu\n", i, i, i)
+	}
+	in := buf.Bytes()
+	for l := 0; l < 10; l++ {
+		l := l
+		if testing.Short() && l > 1 {
+			continue
+		}
+		t.Run(fmt.Sprintf("level-%d", l), func(t *testing.T) {
+			t.Parallel()
+			offset := 1
+			if testing.Short() {
+				offset = 256
+			}
+			for ; offset <= 256; offset *= 2 {
+				// Fail after 'fail' writes
+				w, err := NewWriter(io.Discard, l)
+				if err != nil {
+					t.Fatalf("NewWriter: level %d: %v", l, err)
+				}
+				if w.d.fast == nil {
+					t.Skip("Not Fast...")
+					return
+				}
+				for i := 0; i < (bufferReset-len(in)-offset-maxMatchOffset)/maxMatchOffset; i++ {
+					// skip ahead to where we are close to wrap around...
+					w.d.fast.Reset()
+				}
+				w.d.fast.Reset()
+				_, err = w.Write(in)
+				if err != nil {
+					t.Fatal(err)
+				}
+				for i := 0; i < 50; i++ {
+					// skip ahead again... This should wrap around...
+					w.d.fast.Reset()
+				}
+				w.d.fast.Reset()
+
+				_, err = w.Write(in)
+				if err != nil {
+					t.Fatal(err)
+				}
+				for i := 0; i < (math.MaxUint32-bufferReset)/maxMatchOffset; i++ {
+					// skip ahead to where we are close to wrap around...
+					w.d.fast.Reset()
+				}
+
+				_, err = w.Write(in)
+				if err != nil {
+					t.Fatal(err)
+				}
+				err = w.Close()
+				if err != nil {
+					t.Fatal(err)
+				}
+			}
+		})
+	}
+}
+
+func TestDeterministicL1(t *testing.T)  { testDeterministic(1, t) }
+func TestDeterministicL2(t *testing.T)  { testDeterministic(2, t) }
+func TestDeterministicL3(t *testing.T)  { testDeterministic(3, t) }
+func TestDeterministicL4(t *testing.T)  { testDeterministic(4, t) }
+func TestDeterministicL5(t *testing.T)  { testDeterministic(5, t) }
+func TestDeterministicL6(t *testing.T)  { testDeterministic(6, t) }
+func TestDeterministicL7(t *testing.T)  { testDeterministic(7, t) }
+func TestDeterministicL8(t *testing.T)  { testDeterministic(8, t) }
+func TestDeterministicL9(t *testing.T)  { testDeterministic(9, t) }
+func TestDeterministicL0(t *testing.T)  { testDeterministic(0, t) }
+func TestDeterministicLM2(t *testing.T) { testDeterministic(-2, t) }
+
+func testDeterministic(i int, t *testing.T) {
+	// Test so much we cross a good number of block boundaries.
+	var length = maxStoreBlockSize*30 + 500
+	if testing.Short() {
+		length /= 10
+	}
+
+	// Create a random, but compressible stream.
+	rng := rand.New(rand.NewSource(1))
+	t1 := make([]byte, length)
+	for i := range t1 {
+		t1[i] = byte(rng.Int63() & 7)
+	}
+
+	// Do our first encode.
+	var b1 bytes.Buffer
+	br := bytes.NewBuffer(t1)
+	w, err := NewWriter(&b1, i)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Use a very small prime sized buffer.
+	cbuf := make([]byte, 787)
+	_, err = copyBuffer(w, br, cbuf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	w.Close()
+
+	// We choose a different buffer size,
+	// bigger than a maximum block, and also a prime.
+	var b2 bytes.Buffer
+	cbuf = make([]byte, 81761)
+	br2 := bytes.NewBuffer(t1)
+	w2, err := NewWriter(&b2, i)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = copyBuffer(w2, br2, cbuf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	w2.Close()
+
+	b1b := b1.Bytes()
+	b2b := b2.Bytes()
+
+	if !bytes.Equal(b1b, b2b) {
+		t.Errorf("level %d did not produce deterministic result, result mismatch, len(a) = %d, len(b) = %d", i, len(b1b), len(b2b))
+	}
+
+	// Test using io.WriterTo interface.
+	var b3 bytes.Buffer
+	br = bytes.NewBuffer(t1)
+	w, err = NewWriter(&b3, i)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = br.WriteTo(w)
+	if err != nil {
+		t.Fatal(err)
+	}
+	w.Close()
+
+	b3b := b3.Bytes()
+	if !bytes.Equal(b1b, b3b) {
+		t.Errorf("level %d (io.WriterTo) did not produce deterministic result, result mismatch, len(a) = %d, len(b) = %d", i, len(b1b), len(b3b))
+	}
+}
+
+// copyBuffer is a copy of io.CopyBuffer, since we want to support older go versions.
+// This is modified to never use io.WriterTo or io.ReaderFrom interfaces.
+func copyBuffer(dst io.Writer, src io.Reader, buf []byte) (written int64, err error) {
+	if buf == nil {
+		buf = make([]byte, 32*1024)
+	}
+	for {
+		nr, er := src.Read(buf)
+		if nr > 0 {
+			nw, ew := dst.Write(buf[0:nr])
+			if nw > 0 {
+				written += int64(nw)
+			}
+			if ew != nil {
+				err = ew
+				break
+			}
+			if nr != nw {
+				err = io.ErrShortWrite
+				break
+			}
+		}
+		if er == io.EOF {
+			break
+		}
+		if er != nil {
+			err = er
+			break
+		}
+	}
+	return written, err
+}
+
+func BenchmarkCompressAllocations(b *testing.B) {
+	payload := []byte(strings.Repeat("Tiny payload", 20))
+	for j := -2; j <= 9; j++ {
+		b.Run("level("+strconv.Itoa(j)+")", func(b *testing.B) {
+			b.Run("flate", func(b *testing.B) {
+				b.ReportAllocs()
+
+				for i := 0; i < b.N; i++ {
+					w, err := NewWriter(io.Discard, j)
+					if err != nil {
+						b.Fatal(err)
+					}
+					w.Write(payload)
+					w.Close()
+				}
+			})
+		})
+	}
+}
+
+func BenchmarkCompressAllocationsSingle(b *testing.B) {
+	payload := []byte(strings.Repeat("Tiny payload", 20))
+	const level = 2
+	b.Run("flate", func(b *testing.B) {
+		b.ReportAllocs()
+
+		for i := 0; i < b.N; i++ {
+			w, err := NewWriter(io.Discard, level)
+			if err != nil {
+				b.Fatal(err)
+			}
+			w.Write(payload)
+			w.Close()
+		}
+	})
+}
diff --git a/vendor/github.com/klauspost/compress/flate/ya.make b/vendor/github.com/klauspost/compress/flate/ya.make
new file mode 100644
index 0000000000..4f83849018
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/flate/ya.make
@@ -0,0 +1,51 @@
+GO_LIBRARY()
+
+LICENSE(
+    Apache-2.0 AND
+    BSD-3-Clause AND
+    MIT
+)
+
+SRCS(
+    deflate.go
+    dict_decoder.go
+    fast_encoder.go
+    huffman_bit_writer.go
+    huffman_code.go
+    huffman_sortByFreq.go
+    huffman_sortByLiteral.go
+    inflate.go
+    inflate_gen.go
+    level1.go
+    level2.go
+    level3.go
+    level4.go
+    level5.go
+    level6.go
+    stateless.go
+    token.go
+)
+
+GO_TEST_SRCS(
+    deflate_test.go
+    dict_decoder_test.go
+    flate_test.go
+    fuzz_test.go
+    huffman_bit_writer_test.go
+    inflate_test.go
+    reader_test.go
+    token_test.go
+    writer_test.go
+)
+
+IF (ARCH_X86_64)
+    SRCS(regmask_amd64.go)
+ENDIF()
+
+IF (ARCH_ARM64)
+    SRCS(regmask_other.go)
+ENDIF()
+
+END()
+
+RECURSE(gotest)
author	uzhas <uzhas@ydb.tech>	2023-11-16 16:04:50 +0300
committer	uzhas <uzhas@ydb.tech>	2023-11-16 17:46:46 +0300
commit	46f0c0079bb50609d2eeb6586642bcf114fc5239 (patch)
tree	84e4e4978d57fe5de321ba69bf9d0c290de60a66 /vendor/github.com/klauspost/compress/flate
parent	73045e389397816cc2bdd6cd7818b4bce427b265 (diff)
download	ydb-46f0c0079bb50609d2eeb6586642bcf114fc5239.tar.gz