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45 lines
955 B

package common
import (
"encoding/hex"
"fmt"
"strings"
)
// Fmt shorthand, XXX DEPRECATED
var Fmt = fmt.Sprintf
// RightPadString adds spaces to the right of a string to make it length totalLength
func RightPadString(s string, totalLength int) string {
remaining := totalLength - len(s)
if remaining > 0 {
s = s + strings.Repeat(" ", remaining)
}
return s
}
// LeftPadString adds spaces to the left of a string to make it length totalLength
func LeftPadString(s string, totalLength int) string {
remaining := totalLength - len(s)
if remaining > 0 {
s = strings.Repeat(" ", remaining) + s
}
return s
}
// IsHex returns true for non-empty hex-string prefixed with "0x"
func IsHex(s string) bool {
if len(s) > 2 && 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
}