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gitea/vendor/github.com/andybalholm/brotli/static_dict.go
PhilippHomann 684b7a999f
Dump: add output format tar and output to stdout (#10376)
* Dump: Use mholt/archive/v3 to support tar including many compressions

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Allow dump output to stdout

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: Fixed bug present since #6677 where SessionConfig.Provider is never "file"

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never pack RepoRootPath, LFS.ContentPath and LogRootPath when they are below AppDataPath

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: also dump LFS (fixes #10058)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Dump: never dump CustomPath if CustomPath is a subdir of or equal to AppDataPath (fixes #10365)

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* Use log.Info instead of fmt.Fprintf

Signed-off-by: Philipp Homann <homann.philipp@googlemail.com>

* import ordering

* make fmt

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Matti R <matti@mdranta.net>
2020-06-05 16:47:39 -04:00

666 lines
17 KiB
Go
Vendored

package brotli
import "encoding/binary"
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Class to model the static dictionary. */
const maxStaticDictionaryMatchLen = 37
const kInvalidMatch uint32 = 0xFFFFFFF
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
func hash(data []byte) uint32 {
var h uint32 = binary.LittleEndian.Uint32(data) * kDictHashMul32
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> uint(32-kDictNumBits)
}
func addMatch(distance uint, len uint, len_code uint, matches []uint32) {
var match uint32 = uint32((distance << 5) + len_code)
matches[len] = brotli_min_uint32_t(matches[len], match)
}
func dictMatchLength(dict *dictionary, data []byte, id uint, len uint, maxlen uint) uint {
var offset uint = uint(dict.offsets_by_length[len]) + len*id
return findMatchLengthWithLimit(dict.data[offset:], data, brotli_min_size_t(uint(len), maxlen))
}
func isMatch(d *dictionary, w dictWord, data []byte, max_length uint) bool {
if uint(w.len) > max_length {
return false
} else {
var offset uint = uint(d.offsets_by_length[w.len]) + uint(w.len)*uint(w.idx)
var dict []byte = d.data[offset:]
if w.transform == 0 {
/* Match against base dictionary word. */
return findMatchLengthWithLimit(dict, data, uint(w.len)) == uint(w.len)
} else if w.transform == 10 {
/* Match against uppercase first transform.
Note that there are only ASCII uppercase words in the lookup table. */
return dict[0] >= 'a' && dict[0] <= 'z' && (dict[0]^32) == data[0] && findMatchLengthWithLimit(dict[1:], data[1:], uint(w.len)-1) == uint(w.len-1)
} else {
/* Match against uppercase all transform.
Note that there are only ASCII uppercase words in the lookup table. */
var i uint
for i = 0; i < uint(w.len); i++ {
if dict[i] >= 'a' && dict[i] <= 'z' {
if (dict[i] ^ 32) != data[i] {
return false
}
} else {
if dict[i] != data[i] {
return false
}
}
}
return true
}
}
}
func findAllStaticDictionaryMatches(dict *encoderDictionary, data []byte, min_length uint, max_length uint, matches []uint32) bool {
var has_found_match bool = false
{
var offset uint = uint(dict.buckets[hash(data)])
var end bool = offset == 0
for !end {
var w dictWord
w = dict.dict_words[offset]
offset++
var l uint = uint(w.len) & 0x1F
var n uint = uint(1) << dict.words.size_bits_by_length[l]
var id uint = uint(w.idx)
end = !(w.len&0x80 == 0)
w.len = byte(l)
if w.transform == 0 {
var matchlen uint = dictMatchLength(dict.words, data, id, l, max_length)
var s []byte
var minlen uint
var maxlen uint
var len uint
/* Transform "" + BROTLI_TRANSFORM_IDENTITY + "" */
if matchlen == l {
addMatch(id, l, l, matches)
has_found_match = true
}
/* Transforms "" + BROTLI_TRANSFORM_OMIT_LAST_1 + "" and
"" + BROTLI_TRANSFORM_OMIT_LAST_1 + "ing " */
if matchlen >= l-1 {
addMatch(id+12*n, l-1, l, matches)
if l+2 < max_length && data[l-1] == 'i' && data[l] == 'n' && data[l+1] == 'g' && data[l+2] == ' ' {
addMatch(id+49*n, l+3, l, matches)
}
has_found_match = true
}
/* Transform "" + BROTLI_TRANSFORM_OMIT_LAST_# + "" (# = 2 .. 9) */
minlen = min_length
if l > 9 {
minlen = brotli_max_size_t(minlen, l-9)
}
maxlen = brotli_min_size_t(matchlen, l-2)
for len = minlen; len <= maxlen; len++ {
var cut uint = l - len
var transform_id uint = (cut << 2) + uint((dict.cutoffTransforms>>(cut*6))&0x3F)
addMatch(id+transform_id*n, uint(len), l, matches)
has_found_match = true
}
if matchlen < l || l+6 >= max_length {
continue
}
s = data[l:]
/* Transforms "" + BROTLI_TRANSFORM_IDENTITY + <suffix> */
if s[0] == ' ' {
addMatch(id+n, l+1, l, matches)
if s[1] == 'a' {
if s[2] == ' ' {
addMatch(id+28*n, l+3, l, matches)
} else if s[2] == 's' {
if s[3] == ' ' {
addMatch(id+46*n, l+4, l, matches)
}
} else if s[2] == 't' {
if s[3] == ' ' {
addMatch(id+60*n, l+4, l, matches)
}
} else if s[2] == 'n' {
if s[3] == 'd' && s[4] == ' ' {
addMatch(id+10*n, l+5, l, matches)
}
}
} else if s[1] == 'b' {
if s[2] == 'y' && s[3] == ' ' {
addMatch(id+38*n, l+4, l, matches)
}
} else if s[1] == 'i' {
if s[2] == 'n' {
if s[3] == ' ' {
addMatch(id+16*n, l+4, l, matches)
}
} else if s[2] == 's' {
if s[3] == ' ' {
addMatch(id+47*n, l+4, l, matches)
}
}
} else if s[1] == 'f' {
if s[2] == 'o' {
if s[3] == 'r' && s[4] == ' ' {
addMatch(id+25*n, l+5, l, matches)
}
} else if s[2] == 'r' {
if s[3] == 'o' && s[4] == 'm' && s[5] == ' ' {
addMatch(id+37*n, l+6, l, matches)
}
}
} else if s[1] == 'o' {
if s[2] == 'f' {
if s[3] == ' ' {
addMatch(id+8*n, l+4, l, matches)
}
} else if s[2] == 'n' {
if s[3] == ' ' {
addMatch(id+45*n, l+4, l, matches)
}
}
} else if s[1] == 'n' {
if s[2] == 'o' && s[3] == 't' && s[4] == ' ' {
addMatch(id+80*n, l+5, l, matches)
}
} else if s[1] == 't' {
if s[2] == 'h' {
if s[3] == 'e' {
if s[4] == ' ' {
addMatch(id+5*n, l+5, l, matches)
}
} else if s[3] == 'a' {
if s[4] == 't' && s[5] == ' ' {
addMatch(id+29*n, l+6, l, matches)
}
}
} else if s[2] == 'o' {
if s[3] == ' ' {
addMatch(id+17*n, l+4, l, matches)
}
}
} else if s[1] == 'w' {
if s[2] == 'i' && s[3] == 't' && s[4] == 'h' && s[5] == ' ' {
addMatch(id+35*n, l+6, l, matches)
}
}
} else if s[0] == '"' {
addMatch(id+19*n, l+1, l, matches)
if s[1] == '>' {
addMatch(id+21*n, l+2, l, matches)
}
} else if s[0] == '.' {
addMatch(id+20*n, l+1, l, matches)
if s[1] == ' ' {
addMatch(id+31*n, l+2, l, matches)
if s[2] == 'T' && s[3] == 'h' {
if s[4] == 'e' {
if s[5] == ' ' {
addMatch(id+43*n, l+6, l, matches)
}
} else if s[4] == 'i' {
if s[5] == 's' && s[6] == ' ' {
addMatch(id+75*n, l+7, l, matches)
}
}
}
}
} else if s[0] == ',' {
addMatch(id+76*n, l+1, l, matches)
if s[1] == ' ' {
addMatch(id+14*n, l+2, l, matches)
}
} else if s[0] == '\n' {
addMatch(id+22*n, l+1, l, matches)
if s[1] == '\t' {
addMatch(id+50*n, l+2, l, matches)
}
} else if s[0] == ']' {
addMatch(id+24*n, l+1, l, matches)
} else if s[0] == '\'' {
addMatch(id+36*n, l+1, l, matches)
} else if s[0] == ':' {
addMatch(id+51*n, l+1, l, matches)
} else if s[0] == '(' {
addMatch(id+57*n, l+1, l, matches)
} else if s[0] == '=' {
if s[1] == '"' {
addMatch(id+70*n, l+2, l, matches)
} else if s[1] == '\'' {
addMatch(id+86*n, l+2, l, matches)
}
} else if s[0] == 'a' {
if s[1] == 'l' && s[2] == ' ' {
addMatch(id+84*n, l+3, l, matches)
}
} else if s[0] == 'e' {
if s[1] == 'd' {
if s[2] == ' ' {
addMatch(id+53*n, l+3, l, matches)
}
} else if s[1] == 'r' {
if s[2] == ' ' {
addMatch(id+82*n, l+3, l, matches)
}
} else if s[1] == 's' {
if s[2] == 't' && s[3] == ' ' {
addMatch(id+95*n, l+4, l, matches)
}
}
} else if s[0] == 'f' {
if s[1] == 'u' && s[2] == 'l' && s[3] == ' ' {
addMatch(id+90*n, l+4, l, matches)
}
} else if s[0] == 'i' {
if s[1] == 'v' {
if s[2] == 'e' && s[3] == ' ' {
addMatch(id+92*n, l+4, l, matches)
}
} else if s[1] == 'z' {
if s[2] == 'e' && s[3] == ' ' {
addMatch(id+100*n, l+4, l, matches)
}
}
} else if s[0] == 'l' {
if s[1] == 'e' {
if s[2] == 's' && s[3] == 's' && s[4] == ' ' {
addMatch(id+93*n, l+5, l, matches)
}
} else if s[1] == 'y' {
if s[2] == ' ' {
addMatch(id+61*n, l+3, l, matches)
}
}
} else if s[0] == 'o' {
if s[1] == 'u' && s[2] == 's' && s[3] == ' ' {
addMatch(id+106*n, l+4, l, matches)
}
}
} else {
var is_all_caps bool = (w.transform != transformUppercaseFirst)
/* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and
is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL)
transform. */
var s []byte
if !isMatch(dict.words, w, data, max_length) {
continue
}
/* Transform "" + kUppercase{First,All} + "" */
var tmp int
if is_all_caps {
tmp = 44
} else {
tmp = 9
}
addMatch(id+uint(tmp)*n, l, l, matches)
has_found_match = true
if l+1 >= max_length {
continue
}
/* Transforms "" + kUppercase{First,All} + <suffix> */
s = data[l:]
if s[0] == ' ' {
var tmp int
if is_all_caps {
tmp = 68
} else {
tmp = 4
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
} else if s[0] == '"' {
var tmp int
if is_all_caps {
tmp = 87
} else {
tmp = 66
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
if s[1] == '>' {
var tmp int
if is_all_caps {
tmp = 97
} else {
tmp = 69
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
}
} else if s[0] == '.' {
var tmp int
if is_all_caps {
tmp = 101
} else {
tmp = 79
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
if s[1] == ' ' {
var tmp int
if is_all_caps {
tmp = 114
} else {
tmp = 88
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
}
} else if s[0] == ',' {
var tmp int
if is_all_caps {
tmp = 112
} else {
tmp = 99
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
if s[1] == ' ' {
var tmp int
if is_all_caps {
tmp = 107
} else {
tmp = 58
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
}
} else if s[0] == '\'' {
var tmp int
if is_all_caps {
tmp = 94
} else {
tmp = 74
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
} else if s[0] == '(' {
var tmp int
if is_all_caps {
tmp = 113
} else {
tmp = 78
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
} else if s[0] == '=' {
if s[1] == '"' {
var tmp int
if is_all_caps {
tmp = 105
} else {
tmp = 104
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
} else if s[1] == '\'' {
var tmp int
if is_all_caps {
tmp = 116
} else {
tmp = 108
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
}
}
}
}
}
/* Transforms with prefixes " " and "." */
if max_length >= 5 && (data[0] == ' ' || data[0] == '.') {
var is_space bool = (data[0] == ' ')
var offset uint = uint(dict.buckets[hash(data[1:])])
var end bool = offset == 0
for !end {
var w dictWord
w = dict.dict_words[offset]
offset++
var l uint = uint(w.len) & 0x1F
var n uint = uint(1) << dict.words.size_bits_by_length[l]
var id uint = uint(w.idx)
end = !(w.len&0x80 == 0)
w.len = byte(l)
if w.transform == 0 {
var s []byte
if !isMatch(dict.words, w, data[1:], max_length-1) {
continue
}
/* Transforms " " + BROTLI_TRANSFORM_IDENTITY + "" and
"." + BROTLI_TRANSFORM_IDENTITY + "" */
var tmp int
if is_space {
tmp = 6
} else {
tmp = 32
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
has_found_match = true
if l+2 >= max_length {
continue
}
/* Transforms " " + BROTLI_TRANSFORM_IDENTITY + <suffix> and
"." + BROTLI_TRANSFORM_IDENTITY + <suffix>
*/
s = data[l+1:]
if s[0] == ' ' {
var tmp int
if is_space {
tmp = 2
} else {
tmp = 77
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
} else if s[0] == '(' {
var tmp int
if is_space {
tmp = 89
} else {
tmp = 67
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
} else if is_space {
if s[0] == ',' {
addMatch(id+103*n, l+2, l, matches)
if s[1] == ' ' {
addMatch(id+33*n, l+3, l, matches)
}
} else if s[0] == '.' {
addMatch(id+71*n, l+2, l, matches)
if s[1] == ' ' {
addMatch(id+52*n, l+3, l, matches)
}
} else if s[0] == '=' {
if s[1] == '"' {
addMatch(id+81*n, l+3, l, matches)
} else if s[1] == '\'' {
addMatch(id+98*n, l+3, l, matches)
}
}
}
} else if is_space {
var is_all_caps bool = (w.transform != transformUppercaseFirst)
/* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and
is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL)
transform. */
var s []byte
if !isMatch(dict.words, w, data[1:], max_length-1) {
continue
}
/* Transforms " " + kUppercase{First,All} + "" */
var tmp int
if is_all_caps {
tmp = 85
} else {
tmp = 30
}
addMatch(id+uint(tmp)*n, l+1, l, matches)
has_found_match = true
if l+2 >= max_length {
continue
}
/* Transforms " " + kUppercase{First,All} + <suffix> */
s = data[l+1:]
if s[0] == ' ' {
var tmp int
if is_all_caps {
tmp = 83
} else {
tmp = 15
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
} else if s[0] == ',' {
if !is_all_caps {
addMatch(id+109*n, l+2, l, matches)
}
if s[1] == ' ' {
var tmp int
if is_all_caps {
tmp = 111
} else {
tmp = 65
}
addMatch(id+uint(tmp)*n, l+3, l, matches)
}
} else if s[0] == '.' {
var tmp int
if is_all_caps {
tmp = 115
} else {
tmp = 96
}
addMatch(id+uint(tmp)*n, l+2, l, matches)
if s[1] == ' ' {
var tmp int
if is_all_caps {
tmp = 117
} else {
tmp = 91
}
addMatch(id+uint(tmp)*n, l+3, l, matches)
}
} else if s[0] == '=' {
if s[1] == '"' {
var tmp int
if is_all_caps {
tmp = 110
} else {
tmp = 118
}
addMatch(id+uint(tmp)*n, l+3, l, matches)
} else if s[1] == '\'' {
var tmp int
if is_all_caps {
tmp = 119
} else {
tmp = 120
}
addMatch(id+uint(tmp)*n, l+3, l, matches)
}
}
}
}
}
if max_length >= 6 {
/* Transforms with prefixes "e ", "s ", ", " and "\xC2\xA0" */
if (data[1] == ' ' && (data[0] == 'e' || data[0] == 's' || data[0] == ',')) || (data[0] == 0xC2 && data[1] == 0xA0) {
var offset uint = uint(dict.buckets[hash(data[2:])])
var end bool = offset == 0
for !end {
var w dictWord
w = dict.dict_words[offset]
offset++
var l uint = uint(w.len) & 0x1F
var n uint = uint(1) << dict.words.size_bits_by_length[l]
var id uint = uint(w.idx)
end = !(w.len&0x80 == 0)
w.len = byte(l)
if w.transform == 0 && isMatch(dict.words, w, data[2:], max_length-2) {
if data[0] == 0xC2 {
addMatch(id+102*n, l+2, l, matches)
has_found_match = true
} else if l+2 < max_length && data[l+2] == ' ' {
var t uint = 13
if data[0] == 'e' {
t = 18
} else if data[0] == 's' {
t = 7
}
addMatch(id+t*n, l+3, l, matches)
has_found_match = true
}
}
}
}
}
if max_length >= 9 {
/* Transforms with prefixes " the " and ".com/" */
if (data[0] == ' ' && data[1] == 't' && data[2] == 'h' && data[3] == 'e' && data[4] == ' ') || (data[0] == '.' && data[1] == 'c' && data[2] == 'o' && data[3] == 'm' && data[4] == '/') {
var offset uint = uint(dict.buckets[hash(data[5:])])
var end bool = offset == 0
for !end {
var w dictWord
w = dict.dict_words[offset]
offset++
var l uint = uint(w.len) & 0x1F
var n uint = uint(1) << dict.words.size_bits_by_length[l]
var id uint = uint(w.idx)
end = !(w.len&0x80 == 0)
w.len = byte(l)
if w.transform == 0 && isMatch(dict.words, w, data[5:], max_length-5) {
var tmp int
if data[0] == ' ' {
tmp = 41
} else {
tmp = 72
}
addMatch(id+uint(tmp)*n, l+5, l, matches)
has_found_match = true
if l+5 < max_length {
var s []byte = data[l+5:]
if data[0] == ' ' {
if l+8 < max_length && s[0] == ' ' && s[1] == 'o' && s[2] == 'f' && s[3] == ' ' {
addMatch(id+62*n, l+9, l, matches)
if l+12 < max_length && s[4] == 't' && s[5] == 'h' && s[6] == 'e' && s[7] == ' ' {
addMatch(id+73*n, l+13, l, matches)
}
}
}
}
}
}
}
}
return has_found_match
}