switch to signed-first approach

It turns out signed math is more performant

src/commonMain/kotlin/com/infendro/bytes/bytearray/Conversion.kt

@@ -2,31 +2,56 @@ package com.infendro.bytes.bytearray
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ubytearray.toInt
-import com.infendro.bytes.ubytearray.toLong
-import com.infendro.bytes.ubytearray.toUInt
-import com.infendro.bytes.ubytearray.toULong
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
 
-fun ByteArray.toUInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    asUByteArray().toUInt(startIndex, order)
+fun ByteArray.toInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Int {
+    require(startIndex in 0..(size - 4))
 
-fun ByteArray.toInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    asUByteArray().toInt(startIndex, order)
+    return when (order) {
+        BIG_ENDIAN -> {
+            (this[startIndex].toInt() shl 24) or (this[startIndex + 1].toInt() shl 16) or
+                    (this[startIndex + 2].toInt() shl 8) or this[startIndex + 3].toInt()
+        }
+        LITTLE_ENDIAN -> {
+            this[startIndex].toInt() or (this[startIndex + 1].toInt() shl 8) or
+                    (this[startIndex + 2].toInt() shl 16) or (this[startIndex + 3].toInt() shl 24)
+        }
+    }
+}
 
-fun ByteArray.toUIntArray(order: ByteOrder = BIG_ENDIAN) =
-    UIntArray(size / 4).also { copyInto(it, order = order) }
+fun ByteArray.toUInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): UInt =
+    toInt(startIndex, order).toUInt()
 
-fun ByteArray.toIntArray(order: ByteOrder = BIG_ENDIAN) =
+fun ByteArray.toIntArray(order: ByteOrder = BIG_ENDIAN): IntArray =
     IntArray(size / 4).also { copyInto(it, order = order) }
 
-fun ByteArray.toULong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    asUByteArray().toULong(startIndex, order)
+fun ByteArray.toUIntArray(order: ByteOrder = BIG_ENDIAN): UIntArray =
+    UIntArray(size / 4).also { copyInto(it, order = order) }
 
-fun ByteArray.toLong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    asUByteArray().toLong(startIndex, order)
+fun ByteArray.toLong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Long {
+    require(startIndex in 0..(size - 8))
 
-fun ByteArray.toULongArray(order: ByteOrder = BIG_ENDIAN) =
-    ULongArray(size / 8).also { copyInto(it, order = order) }
+    return when (order) {
+        BIG_ENDIAN -> {
+            (this[startIndex].toLong() shl 56) or (this[startIndex + 1].toLong() shl 48) or
+                    (this[startIndex + 2].toLong() shl 40) or (this[startIndex + 3].toLong() shl 32) or
+                    (this[startIndex + 4].toLong() shl 24) or (this[startIndex + 5].toLong() shl 16) or
+                    (this[startIndex + 6].toLong() shl 8) or this[startIndex + 7].toLong()
+        }
+        LITTLE_ENDIAN -> {
+            this[startIndex].toLong() or (this[startIndex + 1].toLong() shl 8) or
+                    (this[startIndex + 2].toLong() shl 16) or (this[startIndex + 3].toLong() shl 24) or
+                    (this[startIndex + 4].toLong() shl 32) or (this[startIndex + 5].toLong() shl 40) or
+                    (this[startIndex + 6].toLong() shl 48) or (this[startIndex + 7].toLong() shl 56)
+        }
+    }
+}
 
-fun ByteArray.toLongArray(order: ByteOrder = BIG_ENDIAN) =
+fun ByteArray.toULong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): ULong =
+    toLong(startIndex, order).toULong()
+
+fun ByteArray.toLongArray(order: ByteOrder = BIG_ENDIAN): LongArray =
     LongArray(size / 8).also { copyInto(it, order = order) }
+
+fun ByteArray.toULongArray(order: ByteOrder = BIG_ENDIAN): ULongArray =
+    ULongArray(size / 8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/bytearray/Copy.kt

@@ -2,15 +2,7 @@ package com.infendro.bytes.bytearray
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ubytearray.copyInto
-
-fun ByteArray.copyInto(
-    destination: UIntArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) = asUByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
 
 fun ByteArray.copyInto(
     destination: IntArray,
@@ -18,15 +10,39 @@ fun ByteArray.copyInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = asUByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+) {
+    val length = endIndex - startIndex
+    require(length >= 0 && length % 4 == 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length / 4)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length / 4) { i ->
+                val offset = startIndex + (i * 4)
+                destination[destinationOffset + i] =
+                    (this[offset].toInt() shl 24) or (this[offset + 1].toInt() shl 16) or
+                            (this[offset + 2].toInt() shl 8) or this[offset + 3].toInt()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length / 4) { i ->
+                val offset = startIndex + (i * 4)
+                destination[destinationOffset + i] =
+                    this[offset].toInt() or (this[offset + 1].toInt() shl 8) or
+                            (this[offset + 2].toInt() shl 16) or (this[offset + 3].toInt() shl 24)
+            }
+        }
+    }
+}
 
 fun ByteArray.copyInto(
-    destination: ULongArray,
+    destination: UIntArray,
     destinationOffset: Int = 0,
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = asUByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+) = copyInto(destination.asIntArray(), destinationOffset, startIndex, endIndex, order)
 
 fun ByteArray.copyInto(
     destination: LongArray,
@@ -34,4 +50,40 @@ fun ByteArray.copyInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = asUByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+) {
+    val length = endIndex - startIndex
+    require(length >= 0 && length % 8 == 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length / 8)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length / 8) { i ->
+                val offset = startIndex + (i * 8)
+                destination[destinationOffset + i] =
+                    (this[offset].toLong() shl 56) or (this[offset + 1].toLong() shl 48) or
+                            (this[offset + 2].toLong() shl 40) or (this[offset + 3].toLong() shl 32) or
+                            (this[offset + 4].toLong() shl 24) or (this[offset + 5].toLong() shl 16) or
+                            (this[offset + 6].toLong() shl 8) or this[offset + 7].toLong()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length / 8) { i ->
+                val offset = startIndex + (i * 8)
+                destination[destinationOffset + i] =
+                    this[offset].toLong() or (this[offset + 1].toLong() shl 8) or
+                            (this[offset + 2].toLong() shl 16) or (this[offset + 3].toLong() shl 24) or
+                            (this[offset + 4].toLong() shl 32) or (this[offset + 5].toLong() shl 40) or
+                            (this[offset + 6].toLong() shl 48) or (this[offset + 7].toLong() shl 56)
+            }
+        }
+    }
+}
+
+fun ByteArray.copyInto(
+    destination: ULongArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = copyInto(destination.asLongArray(), destinationOffset, startIndex, endIndex, order)

src/commonMain/kotlin/com/infendro/bytes/bytearray/Operators.kt

@@ -1,16 +1,57 @@
 package com.infendro.bytes.bytearray
 
-import com.infendro.bytes.ubytearray.*
+import kotlin.experimental.and
+import kotlin.experimental.inv
+import kotlin.experimental.or
+import kotlin.experimental.xor
 
 fun ByteArray.invInto(
     destination: ByteArray,
     destinationOffset: Int = 0,
     startIndex: Int = 0,
     endIndex: Int = size,
-) = asUByteArray().invInto(destination.asUByteArray(), destinationOffset, startIndex, endIndex)
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    repeat(length) { i ->
+        destination[destinationOffset + i] = this[startIndex + i].inv()
+    }
+}
 
 fun ByteArray.inv() =
-    (asUByteArray().inv()).asByteArray()
+    ByteArray(size).also { invInto(it) }
+
+private inline fun ByteArray.combineInto(
+    that: ByteArray,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    thatStartIndex: Int = 0,
+    combine: (Byte, Byte) -> Byte,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(thatStartIndex in 0..(that.size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    repeat(length) { i ->
+        destination[destinationOffset + i] = combine(this[startIndex + i], that[thatStartIndex + i])
+    }
+}
+
+private inline fun ByteArray.combine(
+    that: ByteArray,
+    combine: (Byte, Byte) -> Byte,
+): ByteArray {
+    require(this.size == that.size)
+
+    return ByteArray(size).also { combineInto(that, it, combine = combine) }
+}
 
 fun ByteArray.andInto(
     that: ByteArray,
@@ -19,17 +60,10 @@ fun ByteArray.andInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = asUByteArray().andInto(
-    that.asUByteArray(),
-    destination.asUByteArray(),
-    destinationOffset,
-    startIndex,
-    endIndex,
-    thatStartIndex,
-)
+) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a and b }
 
 infix fun ByteArray.and(that: ByteArray) =
-    (this.asUByteArray() and that.asUByteArray()).asByteArray()
+    combine(that) { a, b -> a and b }
 
 fun ByteArray.orInto(
     that: ByteArray,
@@ -38,17 +72,10 @@ fun ByteArray.orInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = asUByteArray().orInto(
-    that.asUByteArray(),
-    destination.asUByteArray(),
-    destinationOffset,
-    startIndex,
-    endIndex,
-    thatStartIndex,
-)
+) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a or b }
 
 infix fun ByteArray.or(that: ByteArray) =
-    (this.asUByteArray() or that.asUByteArray()).asByteArray()
+    combine(that) { a, b -> a or b }
 
 fun ByteArray.xorInto(
     that: ByteArray,
@@ -57,14 +84,7 @@ fun ByteArray.xorInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = asUByteArray().xorInto(
-    that.asUByteArray(),
-    destination.asUByteArray(),
-    destinationOffset,
-    startIndex,
-    endIndex,
-    thatStartIndex,
-)
+) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a xor b }
 
 infix fun ByteArray.xor(that: ByteArray) =
-    (this.asUByteArray() xor that.asUByteArray()).asByteArray()
+    combine(that) { a, b -> a xor b }

src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt

@@ -3,14 +3,8 @@ package com.infendro.bytes.int
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun Int.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(4).also { copyInto(it, order = order) }
-
 fun Int.toByteArray(order: ByteOrder = BIG_ENDIAN) =
     ByteArray(4).also { copyInto(it, order = order) }
 
-fun IntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(size * 4).also { copyInto(it, order = order) }
-
-fun IntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
-    ByteArray(size * 4).also { copyInto(it, order = order) }
+fun Int.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(4).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/int/Copy.kt

@@ -2,32 +2,33 @@ package com.infendro.bytes.int
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.uint.copyInto
-
-fun Int.copyInto(
-    destination: UByteArray,
-    destinationOffset: Int = 0,
-    order: ByteOrder = BIG_ENDIAN,
-) = toUInt().copyInto(destination, destinationOffset, order)
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
 
 fun Int.copyInto(
     destination: ByteArray,
     destinationOffset: Int = 0,
     order: ByteOrder = BIG_ENDIAN,
-) = toUInt().copyInto(destination, destinationOffset, order)
+) {
+    require(destinationOffset in 0..(destination.size - 4))
 
-fun IntArray.copyInto(
+    when (order) {
+        BIG_ENDIAN -> {
+            destination[destinationOffset] = (this shr 24).toByte()
+            destination[destinationOffset + 1] = (this shr 16).toByte()
+            destination[destinationOffset + 2] = (this shr 8).toByte()
+            destination[destinationOffset + 3] = this.toByte()
+        }
+        LITTLE_ENDIAN -> {
+            destination[destinationOffset] = this.toByte()
+            destination[destinationOffset + 1] = (this shr 8).toByte()
+            destination[destinationOffset + 2] = (this shr 16).toByte()
+            destination[destinationOffset + 3] = (this shr 24).toByte()
+        }
+    }
+}
+
+fun Int.copyInto(
     destination: UByteArray,
     destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = asUIntArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
-
-fun IntArray.copyInto(
-    destination: ByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) = asUIntArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+) = copyInto(destination.asByteArray(), destinationOffset, order)

src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt

@@ -0,0 +1,10 @@
+package com.infendro.bytes.intarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+
+fun IntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+    ByteArray(size * 4).also { copyInto(it, order = order) }
+
+fun IntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(size * 4).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/intarray/Copy.kt

@@ -0,0 +1,49 @@
+package com.infendro.bytes.intarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun IntArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length * 4)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 4)
+                val value = this[startIndex + i]
+                destination[offset] = (value shr 24).toByte()
+                destination[offset + 1] = (value shr 16).toByte()
+                destination[offset + 2] = (value shr 8).toByte()
+                destination[offset + 3] = value.toByte()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 4)
+                val value = this[startIndex + i]
+                destination[offset] = value.toByte()
+                destination[offset + 1] = (value shr 8).toByte()
+                destination[offset + 2] = (value shr 16).toByte()
+                destination[offset + 3] = (value shr 24).toByte()
+            }
+        }
+    }
+}
+
+fun IntArray.copyInto(
+    destination: UByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = copyInto(destination.asByteArray(), destinationOffset, startIndex, endIndex, order)

src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt

@@ -3,14 +3,8 @@ package com.infendro.bytes.long
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun Long.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(8).also { copyInto(it, order = order) }
-
 fun Long.toByteArray(order: ByteOrder = BIG_ENDIAN) =
     ByteArray(8).also { copyInto(it, order = order) }
 
-fun LongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(size * 8).also { copyInto(it, order = order) }
-
-fun LongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
-    ByteArray(size * 8).also { copyInto(it, order = order) }
+fun Long.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/long/Copy.kt

@@ -2,32 +2,41 @@ package com.infendro.bytes.long
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ulong.copyInto
-
-fun Long.copyInto(
-    destination: UByteArray,
-    destinationOffset: Int = 0,
-    order: ByteOrder = BIG_ENDIAN,
-) = toULong().copyInto(destination, destinationOffset, order)
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
 
 fun Long.copyInto(
     destination: ByteArray,
     destinationOffset: Int = 0,
     order: ByteOrder = BIG_ENDIAN,
-) = toULong().copyInto(destination, destinationOffset, order)
+) {
+    require(destinationOffset in 0..(destination.size - 8))
 
-fun LongArray.copyInto(
+    when (order) {
+        BIG_ENDIAN -> {
+            destination[destinationOffset] = (this shr 56).toByte()
+            destination[destinationOffset + 1] = (this shr 48).toByte()
+            destination[destinationOffset + 2] = (this shr 40).toByte()
+            destination[destinationOffset + 3] = (this shr 32).toByte()
+            destination[destinationOffset + 4] = (this shr 24).toByte()
+            destination[destinationOffset + 5] = (this shr 16).toByte()
+            destination[destinationOffset + 6] = (this shr 8).toByte()
+            destination[destinationOffset + 7] = this.toByte()
+        }
+        LITTLE_ENDIAN -> {
+            destination[destinationOffset] = this.toByte()
+            destination[destinationOffset + 1] = (this shr 8).toByte()
+            destination[destinationOffset + 2] = (this shr 16).toByte()
+            destination[destinationOffset + 3] = (this shr 24).toByte()
+            destination[destinationOffset + 4] = (this shr 32).toByte()
+            destination[destinationOffset + 5] = (this shr 40).toByte()
+            destination[destinationOffset + 6] = (this shr 48).toByte()
+            destination[destinationOffset + 7] = (this shr 56).toByte()
+        }
+    }
+}
+
+fun Long.copyInto(
     destination: UByteArray,
     destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = asULongArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
-
-fun LongArray.copyInto(
-    destination: ByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) = asULongArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+) = copyInto(destination.asByteArray(), destinationOffset, order)

src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt

@@ -0,0 +1,10 @@
+package com.infendro.bytes.longarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+
+fun LongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+    ByteArray(size * 8).also { copyInto(it, order = order) }
+
+fun LongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(size * 8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/longarray/Copy.kt

@@ -0,0 +1,57 @@
+package com.infendro.bytes.longarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun LongArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length * 8)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 8)
+                val value = this[startIndex + i]
+                destination[offset] = (value shr 56).toByte()
+                destination[offset + 1] = (value shr 48).toByte()
+                destination[offset + 2] = (value shr 40).toByte()
+                destination[offset + 3] = (value shr 32).toByte()
+                destination[offset + 4] = (value shr 24).toByte()
+                destination[offset + 5] = (value shr 16).toByte()
+                destination[offset + 6] = (value shr 8).toByte()
+                destination[offset + 7] = value.toByte()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 8)
+                val value = this[startIndex + i]
+                destination[offset] = value.toByte()
+                destination[offset + 1] = (value shr 8).toByte()
+                destination[offset + 2] = (value shr 16).toByte()
+                destination[offset + 3] = (value shr 24).toByte()
+                destination[offset + 4] = (value shr 32).toByte()
+                destination[offset + 5] = (value shr 40).toByte()
+                destination[offset + 6] = (value shr 48).toByte()
+                destination[offset + 7] = (value shr 56).toByte()
+            }
+        }
+    }
+}
+
+fun LongArray.copyInto(
+    destination: UByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = copyInto(destination.asByteArray(), destinationOffset, startIndex, endIndex, order)

src/commonMain/kotlin/com/infendro/bytes/ubytearray/Conversion.kt

@@ -2,56 +2,31 @@ package com.infendro.bytes.ubytearray
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import com.infendro.bytes.bytearray.toInt
+import com.infendro.bytes.bytearray.toLong
+import com.infendro.bytes.bytearray.toUInt
+import com.infendro.bytes.bytearray.toULong
 
-fun UByteArray.toUInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): UInt {
-    require(startIndex in 0..(size - 4))
+fun UByteArray.toInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Int =
+    asByteArray().toInt(startIndex, order)
 
-    return when (order) {
-        BIG_ENDIAN -> {
-            (this[startIndex].toUInt() shl 24) or (this[startIndex + 1].toUInt() shl 16) or
-                    (this[startIndex + 2].toUInt() shl 8) or this[startIndex + 3].toUInt()
-        }
-        LITTLE_ENDIAN -> {
-            this[startIndex].toUInt() or (this[startIndex + 1].toUInt() shl 8) or
-                    (this[startIndex + 2].toUInt() shl 16) or (this[startIndex + 3].toUInt() shl 24)
-        }
-    }
-}
+fun UByteArray.toUInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): UInt =
+    asByteArray().toUInt(startIndex, order)
 
-fun UByteArray.toInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    toUInt(startIndex, order).toInt()
-
-fun UByteArray.toUIntArray(order: ByteOrder = BIG_ENDIAN) =
-    UIntArray(size / 4).also { copyInto(it, order = order) }
-
-fun UByteArray.toIntArray(order: ByteOrder = BIG_ENDIAN) =
+fun UByteArray.toIntArray(order: ByteOrder = BIG_ENDIAN): IntArray =
     IntArray(size / 4).also { copyInto(it, order = order) }
 
-fun UByteArray.toULong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): ULong {
-    require(startIndex in 0..(size - 8))
+fun UByteArray.toUIntArray(order: ByteOrder = BIG_ENDIAN): UIntArray =
+    UIntArray(size / 4).also { copyInto(it, order = order) }
 
-    return when (order) {
-        BIG_ENDIAN -> {
-            (this[startIndex].toULong() shl 56) or (this[startIndex + 1].toULong() shl 48) or
-                    (this[startIndex + 2].toULong() shl 40) or (this[startIndex + 3].toULong() shl 32) or
-                    (this[startIndex + 4].toULong() shl 24) or (this[startIndex + 5].toULong() shl 16) or
-                    (this[startIndex + 6].toULong() shl 8) or this[startIndex + 7].toULong()
-        }
-        LITTLE_ENDIAN -> {
-            this[startIndex].toULong() or (this[startIndex + 1].toULong() shl 8) or
-                    (this[startIndex + 2].toULong() shl 16) or (this[startIndex + 3].toULong() shl 24) or
-                    (this[startIndex + 4].toULong() shl 32) or (this[startIndex + 5].toULong() shl 40) or
-                    (this[startIndex + 6].toULong() shl 48) or (this[startIndex + 7].toULong() shl 56)
-        }
-    }
-}
+fun UByteArray.toLong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Long =
+    asByteArray().toLong(startIndex, order)
 
-fun UByteArray.toLong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN) =
-    toULong(startIndex, order).toLong()
+fun UByteArray.toULong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): ULong =
+    asByteArray().toULong(startIndex, order)
 
-fun UByteArray.toULongArray(order: ByteOrder = BIG_ENDIAN) =
-    ULongArray(size / 8).also { copyInto(it, order = order) }
-
-fun UByteArray.toLongArray(order: ByteOrder = BIG_ENDIAN) =
+fun UByteArray.toLongArray(order: ByteOrder = BIG_ENDIAN): LongArray =
     LongArray(size / 8).also { copyInto(it, order = order) }
+
+fun UByteArray.toULongArray(order: ByteOrder = BIG_ENDIAN): ULongArray =
+    ULongArray(size / 8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/ubytearray/Copy.kt

@@ -2,39 +2,7 @@ package com.infendro.bytes.ubytearray
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
-
-fun UByteArray.copyInto(
-    destination: UIntArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0 && length % 4 == 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - (length / 4)))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            repeat(length / 4) { i ->
-                val offset = startIndex + (i * 4)
-                destination[destinationOffset + i] =
-                    (this[offset].toUInt() shl 24) or (this[offset + 1].toUInt() shl 16) or
-                            (this[offset + 2].toUInt() shl 8) or this[offset + 3].toUInt()
-            }
-        }
-        LITTLE_ENDIAN -> {
-            repeat(length / 4) { i ->
-                val offset = startIndex + (i * 4)
-                destination[destinationOffset + i] =
-                    this[offset].toUInt() or (this[offset + 1].toUInt() shl 8) or
-                            (this[offset + 2].toUInt() shl 16) or (this[offset + 3].toUInt() shl 24)
-            }
-        }
-    }
-}
+import com.infendro.bytes.bytearray.copyInto
 
 fun UByteArray.copyInto(
     destination: IntArray,
@@ -42,7 +10,15 @@ fun UByteArray.copyInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asUIntArray(), destinationOffset, startIndex, endIndex, order)
+) = asByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+
+fun UByteArray.copyInto(
+    destination: UIntArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = asByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
 
 fun UByteArray.copyInto(
     destination: ULongArray,
@@ -50,35 +26,7 @@ fun UByteArray.copyInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0 && length % 8 == 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - (length / 8)))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            repeat(length / 8) { i ->
-                val offset = startIndex + (i * 8)
-                destination[destinationOffset + i] =
-                    (this[offset].toULong() shl 56) or (this[offset + 1].toULong() shl 48) or
-                            (this[offset + 2].toULong() shl 40) or (this[offset + 3].toULong() shl 32) or
-                            (this[offset + 4].toULong() shl 24) or (this[offset + 5].toULong() shl 16) or
-                            (this[offset + 6].toULong() shl 8) or this[offset + 7].toULong()
-            }
-        }
-        LITTLE_ENDIAN -> {
-            repeat(length / 8) { i ->
-                val offset = startIndex + (i * 8)
-                destination[destinationOffset + i] =
-                    this[offset].toULong() or (this[offset + 1].toULong() shl 8) or
-                            (this[offset + 2].toULong() shl 16) or (this[offset + 3].toULong() shl 24) or
-                            (this[offset + 4].toULong() shl 32) or (this[offset + 5].toULong() shl 40) or
-                            (this[offset + 6].toULong() shl 48) or (this[offset + 7].toULong() shl 56)
-            }
-        }
-    }
-}
+) = asByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
 
 fun UByteArray.copyInto(
     destination: LongArray,
@@ -86,4 +34,4 @@ fun UByteArray.copyInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asULongArray(), destinationOffset, startIndex, endIndex, order)
+) = asByteArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)

src/commonMain/kotlin/com/infendro/bytes/ubytearray/Operators.kt

@@ -1,51 +1,19 @@
 package com.infendro.bytes.ubytearray
 
+import com.infendro.bytes.bytearray.andInto
+import com.infendro.bytes.bytearray.invInto
+import com.infendro.bytes.bytearray.orInto
+import com.infendro.bytes.bytearray.xorInto
+
 fun UByteArray.invInto(
     destination: UByteArray,
     destinationOffset: Int = 0,
     startIndex: Int = 0,
     endIndex: Int = size,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - length))
+) = asByteArray().invInto(destination.asByteArray(), destinationOffset, startIndex, endIndex)
 
-    repeat(length) { i ->
-        destination[destinationOffset + i] = this[startIndex + i].inv()
-    }
-}
-
-fun UByteArray.inv() = UByteArray(size).also { invInto(it) }
-
-private inline fun UByteArray.combineInto(
-    that: UByteArray,
-    destination: UByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    thatStartIndex: Int = 0,
-    combine: (UByte, UByte) -> UByte,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0)
-    require(startIndex in 0..(size - length))
-    require(thatStartIndex in 0..(that.size - length))
-    require(destinationOffset in 0..(destination.size - length))
-
-    repeat(length) { i ->
-        destination[destinationOffset + i] = combine(this[startIndex + i], that[thatStartIndex + i])
-    }
-}
-
-private inline fun UByteArray.combine(
-    that: UByteArray,
-    combine: (UByte, UByte) -> UByte,
-): UByteArray {
-    require(this.size == that.size)
-
-    return UByteArray(size).also { combineInto(that, it, combine = combine) }
-}
+fun UByteArray.inv() =
+    UByteArray(size).also { invInto(it) }
 
 fun UByteArray.andInto(
     that: UByteArray,
@@ -54,17 +22,17 @@ fun UByteArray.andInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = combineInto(
-    that,
-    destination,
+) = asByteArray().andInto(
+    that.asByteArray(),
+    destination.asByteArray(),
     destinationOffset,
     startIndex,
     endIndex,
     thatStartIndex,
-) { a, b -> a and b }
+)
 
 infix fun UByteArray.and(that: UByteArray) =
-    combine(that) { a, b -> a and b }
+    UByteArray(size).also { andInto(that, it) }
 
 fun UByteArray.orInto(
     that: UByteArray,
@@ -73,17 +41,17 @@ fun UByteArray.orInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = combineInto(
-    that,
-    destination,
+) = asByteArray().orInto(
+    that.asByteArray(),
+    destination.asByteArray(),
     destinationOffset,
     startIndex,
     endIndex,
     thatStartIndex,
-) { a, b -> a or b }
+)
 
 infix fun UByteArray.or(that: UByteArray) =
-    combine(that) { a, b -> a or b }
+    UByteArray(size).also { orInto(that, it) }
 
 fun UByteArray.xorInto(
     that: UByteArray,
@@ -92,14 +60,14 @@ fun UByteArray.xorInto(
     startIndex: Int = 0,
     endIndex: Int = size,
     thatStartIndex: Int = 0,
-) = combineInto(
-    that,
-    destination,
+) = asByteArray().xorInto(
+    that.asByteArray(),
+    destination.asByteArray(),
     destinationOffset,
     startIndex,
     endIndex,
     thatStartIndex,
-) { a, b -> a xor b }
+)
 
 infix fun UByteArray.xor(that: UByteArray) =
-    combine(that) { a, b -> a xor b }
+    UByteArray(size).also { xorInto(that, it) }

src/commonMain/kotlin/com/infendro/bytes/uint/Conversion.kt

@@ -3,14 +3,8 @@ package com.infendro.bytes.uint
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun UInt.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(4).also { copyInto(it, order = order) }
-
 fun UInt.toByteArray(order: ByteOrder = BIG_ENDIAN) =
     ByteArray(4).also { copyInto(it, order = order) }
 
-fun UIntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(size * 4).also { copyInto(it, order = order) }
-
-fun UIntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
-    ByteArray(size * 4).also { copyInto(it, order = order) }
+fun UInt.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(4).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/uint/Copy.kt

@@ -2,77 +2,16 @@ package com.infendro.bytes.uint
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
-
-fun UInt.copyInto(
-    destination: UByteArray,
-    destinationOffset: Int = 0,
-    order: ByteOrder = BIG_ENDIAN,
-) {
-    require(destinationOffset in 0..(destination.size - 4))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            destination[destinationOffset] = (this shr 24).toUByte()
-            destination[destinationOffset + 1] = (this shr 16).toUByte()
-            destination[destinationOffset + 2] = (this shr 8).toUByte()
-            destination[destinationOffset + 3] = this.toUByte()
-        }
-        LITTLE_ENDIAN -> {
-            destination[destinationOffset] = this.toUByte()
-            destination[destinationOffset + 1] = (this shr 8).toUByte()
-            destination[destinationOffset + 2] = (this shr 16).toUByte()
-            destination[destinationOffset + 3] = (this shr 24).toUByte()
-        }
-    }
-}
+import com.infendro.bytes.int.copyInto
 
 fun UInt.copyInto(
     destination: ByteArray,
     destinationOffset: Int = 0,
     order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asUByteArray(), destinationOffset, order)
+) = toInt().copyInto(destination, destinationOffset, order)
 
-fun UIntArray.copyInto(
+fun UInt.copyInto(
     destination: UByteArray,
     destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - (length * 4)))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            repeat(length) { i ->
-                val offset = destinationOffset + (i * 4)
-                val value = this[startIndex + i]
-                destination[offset] = (value shr 24).toUByte()
-                destination[offset + 1] = (value shr 16).toUByte()
-                destination[offset + 2] = (value shr 8).toUByte()
-                destination[offset + 3] = value.toUByte()
-            }
-        }
-        LITTLE_ENDIAN -> {
-            repeat(length) { i ->
-                val offset = destinationOffset + (i * 4)
-                val value = this[startIndex + i]
-                destination[offset] = value.toUByte()
-                destination[offset + 1] = (value shr 8).toUByte()
-                destination[offset + 2] = (value shr 16).toUByte()
-                destination[offset + 3] = (value shr 24).toUByte()
-            }
-        }
-    }
-}
-
-fun UIntArray.copyInto(
-    destination: ByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asUByteArray(), destinationOffset, startIndex, endIndex, order)
+) = toInt().copyInto(destination, destinationOffset, order)

src/commonMain/kotlin/com/infendro/bytes/uintarray/Conversion.kt

@@ -0,0 +1,10 @@
+package com.infendro.bytes.uintarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+
+fun UIntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+    ByteArray(size * 4).also { copyInto(it, order = order) }
+
+fun UIntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(size * 4).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/uintarray/Copy.kt

@@ -0,0 +1,21 @@
+package com.infendro.bytes.uintarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.intarray.copyInto
+
+fun UIntArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = asIntArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+
+fun UIntArray.copyInto(
+    destination: UByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = asIntArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)

src/commonMain/kotlin/com/infendro/bytes/ulong/Conversion.kt

@@ -3,14 +3,8 @@ package com.infendro.bytes.ulong
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun ULong.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(8).also { copyInto(it, order = order) }
-
 fun ULong.toByteArray(order: ByteOrder = BIG_ENDIAN) =
     ByteArray(8).also { copyInto(it, order = order) }
 
-fun ULongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
-    UByteArray(size * 8).also { copyInto(it, order = order) }
-
-fun ULongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
-    ByteArray(size * 8).also { copyInto(it, order = order) }
+fun ULong.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/ulong/Copy.kt

@@ -2,93 +2,16 @@ package com.infendro.bytes.ulong
 
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
-import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
-
-fun ULong.copyInto(
-    destination: UByteArray,
-    destinationOffset: Int = 0,
-    order: ByteOrder = BIG_ENDIAN,
-) {
-    require(destinationOffset in 0..(destination.size - 8))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            destination[destinationOffset] = (this shr 56).toUByte()
-            destination[destinationOffset + 1] = (this shr 48).toUByte()
-            destination[destinationOffset + 2] = (this shr 40).toUByte()
-            destination[destinationOffset + 3] = (this shr 32).toUByte()
-            destination[destinationOffset + 4] = (this shr 24).toUByte()
-            destination[destinationOffset + 5] = (this shr 16).toUByte()
-            destination[destinationOffset + 6] = (this shr 8).toUByte()
-            destination[destinationOffset + 7] = this.toUByte()
-        }
-        LITTLE_ENDIAN -> {
-            destination[destinationOffset] = this.toUByte()
-            destination[destinationOffset + 1] = (this shr 8).toUByte()
-            destination[destinationOffset + 2] = (this shr 16).toUByte()
-            destination[destinationOffset + 3] = (this shr 24).toUByte()
-            destination[destinationOffset + 4] = (this shr 32).toUByte()
-            destination[destinationOffset + 5] = (this shr 40).toUByte()
-            destination[destinationOffset + 6] = (this shr 48).toUByte()
-            destination[destinationOffset + 7] = (this shr 56).toUByte()
-        }
-    }
-}
+import com.infendro.bytes.long.copyInto
 
 fun ULong.copyInto(
     destination: ByteArray,
     destinationOffset: Int = 0,
     order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asUByteArray(), destinationOffset, order)
+) = toLong().copyInto(destination, destinationOffset, order)
 
-fun ULongArray.copyInto(
+fun ULong.copyInto(
     destination: UByteArray,
     destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
     order: ByteOrder = BIG_ENDIAN,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - (length * 8)))
-
-    when (order) {
-        BIG_ENDIAN -> {
-            repeat(length) { i ->
-                val offset = destinationOffset + (i * 8)
-                val value = this[startIndex + i]
-                destination[offset] = (value shr 56).toUByte()
-                destination[offset + 1] = (value shr 48).toUByte()
-                destination[offset + 2] = (value shr 40).toUByte()
-                destination[offset + 3] = (value shr 32).toUByte()
-                destination[offset + 4] = (value shr 24).toUByte()
-                destination[offset + 5] = (value shr 16).toUByte()
-                destination[offset + 6] = (value shr 8).toUByte()
-                destination[offset + 7] = value.toUByte()
-            }
-        }
-        LITTLE_ENDIAN -> {
-            repeat(length) { i ->
-                val offset = destinationOffset + (i * 8)
-                val value = this[startIndex + i]
-                destination[offset] = value.toUByte()
-                destination[offset + 1] = (value shr 8).toUByte()
-                destination[offset + 2] = (value shr 16).toUByte()
-                destination[offset + 3] = (value shr 24).toUByte()
-                destination[offset + 4] = (value shr 32).toUByte()
-                destination[offset + 5] = (value shr 40).toUByte()
-                destination[offset + 6] = (value shr 48).toUByte()
-                destination[offset + 7] = (value shr 56).toUByte()
-            }
-        }
-    }
-}
-
-fun ULongArray.copyInto(
-    destination: ByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-    order: ByteOrder = BIG_ENDIAN,
-) = copyInto(destination.asUByteArray(), destinationOffset, startIndex, endIndex, order)
+) = toLong().copyInto(destination, destinationOffset, order)

src/commonMain/kotlin/com/infendro/bytes/ulongarray/Conversion.kt

@@ -0,0 +1,10 @@
+package com.infendro.bytes.ulongarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+
+fun ULongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+    ByteArray(size * 8).also { copyInto(it, order = order) }
+
+fun ULongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+    UByteArray(size * 8).also { copyInto(it, order = order) }

src/commonMain/kotlin/com/infendro/bytes/ulongarray/Copy.kt

@@ -0,0 +1,21 @@
+package com.infendro.bytes.ulongarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.longarray.copyInto
+
+fun ULongArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = asLongArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)
+
+fun ULongArray.copyInto(
+    destination: UByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) = asLongArray().copyInto(destination, destinationOffset, startIndex, endIndex, order)