-
Notifications
You must be signed in to change notification settings - Fork 9
/
Copy pathutils.go
171 lines (144 loc) · 3.17 KB
/
utils.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
package main
import (
"bytes"
"strconv"
"sync"
"time"
"unicode/utf8"
)
var (
bytesPool = sync.Pool{
New: func() interface{} {
return make([]byte, 4094)
},
}
)
func byteSliceToInt64(s []byte) (res int64, ok bool) {
sign := len(s) > 0 && s[0] == '-'
if sign {
s = s[1:]
}
ok = true
res = 0
for _, c := range s {
if v := int64(c - '0'); v < 0 || v > 9 {
ok = false
break
} else {
res = res*10 + v
}
}
if sign {
res = -res
}
return
}
func utf8UnescapedLen(b []byte) int {
if len(b) == 0 {
return 0
}
return utf8.RuneCount(utf8Unescaped(b))
}
// хак для перевода экранированных строк вида "\u1234\u5678" в нормальный юникод
// выделяет память под ответ
func utf8Unescaped(b []byte) []byte {
buf := bytesPool.Get().([]byte)[:0]
var tmp [4]byte
i, l := 0, len(b)
for i < l {
ch := b[i]
// \u1234
// в случае любых ошибок просто пропускаем один байт
if ch != '\\' {
} else if (i >= l-4) || b[i+1] != 'u' {
} else if r, err := strconv.ParseUint(string(b[i+2:i+6]), 16, 64); err != nil {
} else {
n := utf8.EncodeRune(tmp[:], rune(r))
buf = append(buf, tmp[:n]...)
i += 6
continue
}
buf = append(buf, ch)
i++
}
res := append([]byte{}, buf...)
bytesPool.Put(buf)
return res
}
func timeFloor(t time.Time) time.Time {
year, month, day := t.Date()
t = time.Date(year, month, day, 0, 0, 0, 0, t.Location())
return t
}
var agesTimestamps []int64
func ageToTimestampWarming() {
for age := 0; age <= 200; age++ {
agesTimestamps = append(agesTimestamps, ageToTimestamp(int32(age)))
}
}
func ageToTimestamp(age int32) int64 {
if (age >= 0) && int(age) < len(agesTimestamps) {
return agesTimestamps[age]
}
year, month, day := timeNow.Date()
ts := time.Date(year-int(age), month, day, 0, 0, 0, 0, timeNow.Location())
return ts.Unix()
}
func bytesToLowerInplace(buf []byte) {
for i, ch := range buf {
if ch >= 'A' && ch <= 'Z' {
buf[i] += 'a' - 'A'
}
}
}
func bytesTrimLeftInplace(buf []byte) []byte {
i, l := 0, len(buf)
for ; i < l && buf[i] == ' '; i++ {
}
return buf[i:]
}
// скопировано из github.com/valyala/fasthttp
var hex2intTable = func() []byte {
b := make([]byte, 255)
for i := byte(0); i < 255; i++ {
c := byte(16)
if i >= '0' && i <= '9' {
c = i - '0'
} else if i >= 'a' && i <= 'f' {
c = i - 'a' + 10
} else if i >= 'A' && i <= 'F' {
c = i - 'A' + 10
}
b[i] = c
}
return b
}()
// скопировано из github.com/valyala/fasthttp
func urlDecode(dst, src []byte) []byte {
if bytes.IndexByte(src, '%') < 0 && bytes.IndexByte(src, '+') < 0 {
// fast path: src doesn't contain encoded chars
return append(dst, src...)
}
// slow path
for i := 0; i < len(src); i++ {
c := src[i]
if c == '%' {
if i+2 >= len(src) {
return append(dst, src[i:]...)
}
x2 := hex2intTable[src[i+2]]
x1 := hex2intTable[src[i+1]]
if x1 == 16 || x2 == 16 {
dst = append(dst, '%')
} else {
dst = append(dst, x1<<4|x2)
i += 2
}
} else if c == '+' {
dst = append(dst, ' ')
} else {
dst = append(dst, c)
}
}
return dst
}