1 package internal
2
3 import "github.com/go-redis/redis/internal/util"
4
5 func ToLower(s string) string {
6 if isLower(s) {
7 return s
8 }
9
10 b := make([]byte, len(s))
11 for i := range b {
12 c := s[i]
13 if c >= 'A' && c <= 'Z' {
14 c += 'a' - 'A'
15 }
16 b[i] = c
17 }
18 return util.BytesToString(b)
19 }
20
21 func isLower(s string) bool {
22 for i := 0; i < len(s); i++ {
23 c := s[i]
24 if c >= 'A' && c <= 'Z' {
25 return false
26 }
27 }
28 return true
29 }
30
31 func Unwrap(err error) error {
32 u, ok := err.(interface {
33 Unwrap() error
34 })
35 if !ok {
36 return nil
37 }
38 return u.Unwrap()
39 }
40
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