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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"bytes"
"crypto/rand"
"fmt"
"math/big"
"strconv"
"strings"
"code.gitea.io/gitea/modules/optional"
"golang.org/x/text/cases"
"golang.org/x/text/language"
)
// OptionalBoolParse get the corresponding optional.Option[bool] of a string using strconv.ParseBool
func OptionalBoolParse(s string) optional.Option[bool] {
v, e := strconv.ParseBool(s)
if e != nil {
return optional.None[bool]()
}
return optional.Some(v)
}
// IsEmptyString checks if the provided string is empty
func IsEmptyString(s string) bool {
return len(strings.TrimSpace(s)) == 0
}
// NormalizeEOL will convert Windows (CRLF) and Mac (CR) EOLs to UNIX (LF)
func NormalizeEOL(input []byte) []byte {
var right, left, pos int
if right = bytes.IndexByte(input, '\r'); right == -1 {
return input
}
length := len(input)
tmp := make([]byte, length)
// We know that left < length because otherwise right would be -1 from IndexByte.
copy(tmp[pos:pos+right], input[left:left+right])
pos += right
tmp[pos] = '\n'
left += right + 1
pos++
for left < length {
if input[left] == '\n' {
left++
}
right = bytes.IndexByte(input[left:], '\r')
if right == -1 {
copy(tmp[pos:], input[left:])
pos += length - left
break
}
copy(tmp[pos:pos+right], input[left:left+right])
pos += right
tmp[pos] = '\n'
left += right + 1
pos++
}
return tmp[:pos]
}
// CryptoRandomInt returns a crypto random integer between 0 and limit, inclusive
func CryptoRandomInt(limit int64) (int64, error) {
rInt, err := rand.Int(rand.Reader, big.NewInt(limit))
if err != nil {
return 0, err
}
return rInt.Int64(), nil
}
const alphanumericalChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
// CryptoRandomString generates a crypto random alphanumerical string, each byte is generated by [0,61] range
func CryptoRandomString(length int64) (string, error) {
buf := make([]byte, length)
limit := int64(len(alphanumericalChars))
for i := range buf {
num, err := CryptoRandomInt(limit)
if err != nil {
return "", err
}
buf[i] = alphanumericalChars[num]
}
return string(buf), nil
}
// CryptoRandomBytes generates `length` crypto bytes
// This differs from CryptoRandomString, as each byte in CryptoRandomString is generated by [0,61] range
// This function generates totally random bytes, each byte is generated by [0,255] range
func CryptoRandomBytes(length int64) ([]byte, error) {
buf := make([]byte, length)
_, err := rand.Read(buf)
return buf, err
}
// ToUpperASCII returns s with all ASCII letters mapped to their upper case.
func ToUpperASCII(s string) string {
b := []byte(s)
for i, c := range b {
if 'a' <= c && c <= 'z' {
b[i] -= 'a' - 'A'
}
}
return string(b)
}
// ToTitleCase returns s with all english words capitalized
func ToTitleCase(s string) string {
// `cases.Title` is not thread-safe, do not use global shared variable for it
return cases.Title(language.English).String(s)
}
// ToTitleCaseNoLower returns s with all english words capitalized without lower-casing
func ToTitleCaseNoLower(s string) string {
// `cases.Title` is not thread-safe, do not use global shared variable for it
return cases.Title(language.English, cases.NoLower).String(s)
}
// ToInt64 transform a given int into int64.
func ToInt64(number any) (int64, error) {
var value int64
switch v := number.(type) {
case int:
value = int64(v)
case int8:
value = int64(v)
case int16:
value = int64(v)
case int32:
value = int64(v)
case int64:
value = v
case uint:
value = int64(v)
case uint8:
value = int64(v)
case uint16:
value = int64(v)
case uint32:
value = int64(v)
case uint64:
value = int64(v)
case float32:
value = int64(v)
case float64:
value = int64(v)
case string:
var err error
if value, err = strconv.ParseInt(v, 10, 64); err != nil {
return 0, err
}
default:
return 0, fmt.Errorf("unable to convert %v to int64", number)
}
return value, nil
}
// ToFloat64 transform a given int into float64.
func ToFloat64(number any) (float64, error) {
var value float64
switch v := number.(type) {
case int:
value = float64(v)
case int8:
value = float64(v)
case int16:
value = float64(v)
case int32:
value = float64(v)
case int64:
value = float64(v)
case uint:
value = float64(v)
case uint8:
value = float64(v)
case uint16:
value = float64(v)
case uint32:
value = float64(v)
case uint64:
value = float64(v)
case float32:
value = float64(v)
case float64:
value = v
case string:
var err error
if value, err = strconv.ParseFloat(v, 64); err != nil {
return 0, err
}
default:
return 0, fmt.Errorf("unable to convert %v to float64", number)
}
return value, nil
}
// ToPointer returns the pointer of a copy of any given value
func ToPointer[T any](val T) *T {
return &val
}
// IfZero returns "def" if "v" is a zero value, otherwise "v"
func IfZero[T comparable](v, def T) T {
var zero T
if v == zero {
return def
}
return v
}
|
