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Update dependencies and replace uuid library (#100)

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This commit is contained in:
Joona Hoikkala
2018-08-10 16:51:32 +03:00
committed by GitHub
parent 8aa869b2f8
commit 75d4a30c1f
1771 changed files with 103824 additions and 39288 deletions
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vendor/github.com/klauspost/compress/flate/inflate.go
Generated Vendored
+71 -37
View File
@@ -10,12 +10,14 @@ package flate
import (
"bufio"
"io"
"math/bits"
"strconv"
"sync"
)
const (
maxCodeLen = 16 // max length of Huffman code
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.
@@ -101,10 +103,10 @@ const (
)
type huffmanDecoder struct {
min int // the minimum code length
chunks [huffmanNumChunks]uint32 // chunks as described above
links [][]uint32 // overflow links
linkMask uint32 // mask the width of the link table
min int // the minimum code length
chunks *[huffmanNumChunks]uint32 // chunks as described above
links [][]uint32 // overflow links
linkMask uint32 // mask the width of the link table
}
// Initialize Huffman decoding tables from array of code lengths.
@@ -112,21 +114,24 @@ type huffmanDecoder struct {
// 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(bits []int) bool {
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]uint32{}
}
if h.min != 0 {
*h = huffmanDecoder{}
*h = huffmanDecoder{chunks: h.chunks, links: h.links}
}
// Count number of codes of each length,
// compute min and max length.
var count [maxCodeLen]int
var min, max int
for _, n := range bits {
for _, n := range lengths {
if n == 0 {
continue
}
@@ -136,7 +141,7 @@ func (h *huffmanDecoder) init(bits []int) bool {
if n > max {
max = n
}
count[n]++
count[n&maxCodeLenMask]++
}
// Empty tree. The decompressor.huffSym function will fail later if the tree
@@ -154,8 +159,8 @@ func (h *huffmanDecoder) init(bits []int) bool {
var nextcode [maxCodeLen]int
for i := min; i <= max; i++ {
code <<= 1
nextcode[i] = code
code += count[i]
nextcode[i&maxCodeLenMask] = code
code += count[i&maxCodeLenMask]
}
// Check that the coding is complete (i.e., that we've
@@ -168,33 +173,49 @@ func (h *huffmanDecoder) init(bits []int) bool {
}
h.min = 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
h.links = make([][]uint32, huffmanNumChunks-link)
if cap(h.links) < huffmanNumChunks-link {
h.links = make([][]uint32, huffmanNumChunks-link)
} else {
h.links = h.links[:huffmanNumChunks-link]
}
for j := uint(link); j < huffmanNumChunks; j++ {
reverse := int(reverseByte[j>>8]) | int(reverseByte[j&0xff])<<8
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] = uint32(off<<huffmanValueShift | (huffmanChunkBits + 1))
h.links[off] = make([]uint32, numLinks)
if cap(h.links[off]) < numLinks {
h.links[off] = make([]uint32, numLinks)
} else {
links := h.links[off][:0]
h.links[off] = links[:numLinks]
}
}
} else {
h.links = h.links[:0]
}
for i, n := range bits {
for i, n := range lengths {
if n == 0 {
continue
}
code := nextcode[n]
nextcode[n]++
chunk := uint32(i<<huffmanValueShift | n)
reverse := int(reverseByte[code>>8]) | int(reverseByte[code&0xff])<<8
reverse := int(bits.Reverse16(uint16(code)))
reverse >>= uint(16 - n)
if n <= huffmanChunkBits {
for off := reverse; off < len(h.chunks); off += 1 << uint(n) {
@@ -589,7 +610,7 @@ readLiteral:
return
}
}
dist = int(reverseByte[(f.b&0x1F)<<3])
dist = int(bits.Reverse8(uint8(f.b & 0x1F << 3)))
f.b >>= 5
f.nb -= 5
} else {
@@ -661,10 +682,7 @@ func (f *decompressor) dataBlock() {
nr, err := io.ReadFull(f.r, f.buf[0:4])
f.roffset += int64(nr)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
f.err = err
f.err = noEOF(err)
return
}
n := int(f.buf[0]) | int(f.buf[1])<<8
@@ -697,10 +715,7 @@ func (f *decompressor) copyData() {
f.copyLen -= cnt
f.dict.writeMark(cnt)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
f.err = err
f.err = noEOF(err)
return
}
@@ -722,13 +737,18 @@ func (f *decompressor) finishBlock() {
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 {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return err
return noEOF(err)
}
f.roffset++
f.b |= uint32(c) << f.nb
@@ -743,25 +763,37 @@ func (f *decompressor) huffSym(h *huffmanDecoder) (int, error) {
// cases, the chunks slice will be 0 for the invalid sequence, leading it
// satisfy the n == 0 check below.
n := uint(h.min)
// 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 f.nb < n {
if err := f.moreBits(); err != nil {
return 0, err
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 & 31)
nb += 8
}
chunk := h.chunks[f.b&(huffmanNumChunks-1)]
chunk := h.chunks[b&(huffmanNumChunks-1)]
n = uint(chunk & huffmanCountMask)
if n > huffmanChunkBits {
chunk = h.links[chunk>>huffmanValueShift][(f.b>>huffmanChunkBits)&h.linkMask]
chunk = h.links[chunk>>huffmanValueShift][(b>>huffmanChunkBits)&h.linkMask]
n = uint(chunk & huffmanCountMask)
}
if n <= f.nb {
if n <= nb {
if n == 0 {
f.b = b
f.nb = nb
f.err = CorruptInputError(f.roffset)
return 0, f.err
}
f.b >>= n
f.nb -= n
f.b = b >> (n & 31)
f.nb = nb - n
return int(chunk >> huffmanValueShift), nil
}
}
@@ -799,6 +831,8 @@ func (f *decompressor) Reset(r io.Reader, dict []byte) error {
r: makeReader(r),
bits: f.bits,
codebits: f.codebits,
h1: f.h1,
h2: f.h2,
dict: f.dict,
step: (*decompressor).nextBlock,
}
vendor/github.com/klauspost/compress/flate/reader_test.go
Generated Vendored
+10 -1
View File
@@ -25,6 +25,7 @@ func TestNlitOutOfRange(t *testing.T) {
const (
digits = iota
twain
random
)
var testfiles = []string{
@@ -34,6 +35,8 @@ var testfiles = []string{
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) {
@@ -63,8 +66,11 @@ func benchmarkDecode(b *testing.B, testfile, level, n int) {
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++ {
io.Copy(ioutil.Discard, NewReader(bytes.NewReader(buf1)))
res.Reset(bytes.NewReader(buf1), nil)
io.Copy(ioutil.Discard, r)
}
}
@@ -95,3 +101,6 @@ func BenchmarkDecodeTwainDefault1e6(b *testing.B) { benchmarkDecode(b, twain,
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) }