NSData to ByteArray

ByteUtils.kt

@OptIn(ExperimentalForeignApi::class, BetaInteropApi::class)
internal inline fun ByteArray.toData(offset: Int = 0, length: ULong = size.toULong()): NSData {
    if (isEmpty()) return NSData()
    val pinned = pin()
    return NSData.create(
        bytesNoCopy = pinned.addressOf(offset),
        length = length,
        deallocator = { _, _ -> pinned.unpin() }
    )
}

@OptIn(ExperimentalForeignApi::class)
internal inline fun NSData.toByteArray(): ByteArray {
    val size = length.toInt()
    val byteArray = ByteArray(size)
    if (size > 0) {
        byteArray.usePinned { pinned ->
            memcpy(pinned.addressOf(0), this.bytes, this.length)
        }
    }
    return byteArray
}