Infendro/hash.kt
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use bytearray library

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Infendro
2025-07-24 20:35:51 +02:00
parent 2a11ec3653
commit 9579d3c97b
9 changed files with 30 additions and 138 deletions
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119
src/commonMain/kotlin/com/infendro/hash/util/ByteArray.kt
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package com.infendro.hash.util
import com.infendro.hash.util.ByteOrder.BIG_ENDIAN
import com.infendro.hash.util.ByteOrder.LITTLE_ENDIAN
internal fun MutableCollection<Byte>.addAll(
bytes: ByteArray,
): Boolean {
return addAll(bytes.toList())
}
enum class ByteOrder {
BIG_ENDIAN,
LITTLE_ENDIAN,
}
internal fun UInt.toByteArray(
order: ByteOrder = BIG_ENDIAN,
): ByteArray {
val bytes = ByteArray(4) { i ->
val offset = (3 - i) * 8
(this shr offset).toByte()
}
return when (order) {
BIG_ENDIAN -> bytes
LITTLE_ENDIAN -> bytes.reversedArray()
}
}
internal fun ULong.toByteArray(
order: ByteOrder = BIG_ENDIAN,
): ByteArray {
val bytes = ByteArray(8) { i ->
val offset = (7 - i) * 8
(this shr offset).toByte()
}
return when (order) {
BIG_ENDIAN -> bytes
LITTLE_ENDIAN -> bytes.reversedArray()
}
}
internal fun ByteArray.toUInt(
order: ByteOrder = BIG_ENDIAN,
): UInt {
if (size != 4) throw Exception()
val bytes = when (order) {
BIG_ENDIAN -> this
LITTLE_ENDIAN -> this.reversedArray()
}
return bytes.fold(0U) { acc, byte ->
(acc shl 8) or (byte.toUInt() and 0xFFU)
}
}
internal fun Collection<Byte>.toUInt(
order: ByteOrder = BIG_ENDIAN,
): UInt {
return toByteArray().toUInt(order)
}
internal fun ByteArray.toULong(
order: ByteOrder = BIG_ENDIAN,
): ULong {
if (size != 8) throw Exception()
val bytes = when (order) {
BIG_ENDIAN -> this
LITTLE_ENDIAN -> this.reversedArray()
}
return bytes.fold(0UL) { acc, byte ->
(acc shl 8) or (byte.toULong() and 0xFFUL)
}
}
internal fun Collection<Byte>.toULong(
order: ByteOrder = BIG_ENDIAN,
): ULong {
return toByteArray().toULong(order)
}
internal fun ByteArray.toUIntArray(
order: ByteOrder = BIG_ENDIAN,
): UIntArray {
if (size % 4 != 0) throw Exception()
return toList()
.chunked(4)
.map { it.toUInt(order) }
.toUIntArray()
}
internal fun Collection<Byte>.toUIntArray(
order: ByteOrder = BIG_ENDIAN,
): UIntArray {
return toByteArray().toUIntArray(order)
}
internal fun ByteArray.toULongArray(
order: ByteOrder = BIG_ENDIAN,
): ULongArray {
if (size % 8 != 0) throw Exception()
return toList()
.chunked(8)
.map { it.toULong(order) }
.toULongArray()
}
internal fun Collection<Byte>.toULongArray(
order: ByteOrder = BIG_ENDIAN,
): ULongArray {
return toByteArray().toULongArray(order)
}