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/*
* This file is part of GNU Taler
* (C) 2020 Taler Systems S.A.
*
* GNU Taler is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 3, or (at your option) any later version.
*
* GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.common
object ByteArrayUtils {
private const val HEX_CHARS = "0123456789ABCDEF"
fun hexStringToByteArray(data: String): ByteArray {
val result = ByteArray(data.length / 2)
for (i in data.indices step 2) {
val firstIndex = HEX_CHARS.indexOf(data[i])
val secondIndex = HEX_CHARS.indexOf(data[i + 1])
val octet = firstIndex.shl(4).or(secondIndex)
result[i.shr(1)] = octet.toByte()
}
return result
}
private val HEX_CHARS_ARRAY = HEX_CHARS.toCharArray()
@Suppress("unused")
fun toHex(byteArray: ByteArray): String {
val result = StringBuffer()
byteArray.forEach {
val octet = it.toInt()
val firstIndex = (octet and 0xF0).ushr(4)
val secondIndex = octet and 0x0F
result.append(HEX_CHARS_ARRAY[firstIndex])
result.append(HEX_CHARS_ARRAY[secondIndex])
}
return result.toString()
}
}
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