You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
1.5 KiB
74 lines
1.5 KiB
package common
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// Like fmt.Sprintf, but skips formatting if args are empty.
|
|
var Fmt = func(format string, a ...interface{}) string {
|
|
if len(a) == 0 {
|
|
return format
|
|
}
|
|
return fmt.Sprintf(format, a...)
|
|
}
|
|
|
|
// IsHex returns true for non-empty hex-string prefixed with "0x"
|
|
func IsHex(s string) bool {
|
|
if len(s) > 2 && strings.EqualFold(s[:2], "0x") {
|
|
_, err := hex.DecodeString(s[2:])
|
|
return err == nil
|
|
}
|
|
return false
|
|
}
|
|
|
|
// StripHex returns hex string without leading "0x"
|
|
func StripHex(s string) string {
|
|
if IsHex(s) {
|
|
return s[2:]
|
|
}
|
|
return s
|
|
}
|
|
|
|
// StringInSlice returns true if a is found the list.
|
|
func StringInSlice(a string, list []string) bool {
|
|
for _, b := range list {
|
|
if b == a {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// SplitAndTrim slices s into all subslices separated by sep and returns a
|
|
// slice of the string s with all leading and trailing Unicode code points
|
|
// contained in cutset removed. If sep is empty, SplitAndTrim splits after each
|
|
// UTF-8 sequence. First part is equivalent to strings.SplitN with a count of
|
|
// -1.
|
|
func SplitAndTrim(s, sep, cutset string) []string {
|
|
if s == "" {
|
|
return []string{}
|
|
}
|
|
|
|
spl := strings.Split(s, sep)
|
|
for i := 0; i < len(spl); i++ {
|
|
spl[i] = strings.Trim(spl[i], cutset)
|
|
}
|
|
return spl
|
|
}
|
|
|
|
// Returns true if s is a non-empty printable non-tab ascii character.
|
|
func IsASCIIText(s string) bool {
|
|
if len(s) == 0 {
|
|
return false
|
|
}
|
|
for _, b := range []byte(s) {
|
|
if 32 <= b && b <= 126 {
|
|
// good
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|