encodeToEscapedString.kt

// https://stackoverflow.com/questions/7487917/convert-byte-array-to-escaped-string
fun encodeToEscapedString(bytes: ByteArray): String {
    // 0x00..0x1f = non-printing characters
    // 0x20 = SPACE
    // 0x21..0x7e = printing characters
    // 0x7f = DELETE
    val string = StringBuilder()
    val intSize = 0xff
    val byteRange = 0x20..0x7e
    for (byte in bytes) {
        val intByte = byte.toInt()
        when (byte) {
            in byteRange -> string.append(intByte.toChar())
            else -> string.append(String.format("\\0x%02x", (intByte and intSize).toByte()))
        }
    }
    return string.toString()
}