Image bytes to file kmp

PlaygroundImageToIos.kt

@OptIn(UnsafeNumber::class, ExperimentalForeignApi::class)
private fun ByteArray.toNSData(): NSData = NSMutableData().apply {
    if (isEmpty()) return@apply
    this@toNSData.usePinned {
        appendBytes(it.addressOf(0), size.convert())
    }
}

@OptIn(UnsafeNumber::class, ExperimentalForeignApi::class)
private fun NSData.toByteArray(): ByteArray {
    val result = ByteArray(length.toInt())
    if (result.isEmpty()) return result

    result.usePinned {
        memcpy(it.addressOf(0), bytes, length)
    }

    return result
}