grokify/mogo

package hexutil

import (
    "encoding/hex"
    "strings"
)

// EncodeToString returns hex string using a supplied seperator. The return
// value is lower case.
func EncodeToString(src []byte, sep string) string {
    if sep == "" {
        return hex.EncodeToString(src)
    }
    s := ""
    for i, b := range src {
        s += hex.EncodeToString([]byte{b})
        if i+1 < len(src) {
            s += sep
        }
    }
    return s
}

// EncodeToStrings returns a slice of strings with leading 0s. The `toUpper`
// param optionally returns upper case values.
func EncodeToStrings(src []byte, toUpper bool) []string {
    var s []string
    for _, b := range src {
        if toUpper {
            s = append(s, strings.ToUpper(hex.EncodeToString([]byte{b})))
        } else {
            s = append(s, hex.EncodeToString([]byte{b}))
        }
    }
    return s
}