Kotlin-native: How to convert NSData to ByteArray?

[DTHeaven]

We need to use protobuf(Objective-C GPBMessage) in common code, thus we inherit GPBMessage and delegate it's fields to Kotlin properties. Then we can use wire to wrap these objects.

Now we need convert NSData to ByteArray(infact we need okio/ByteString, which initialed with ByteArray), we do this work like this:

val byteArray = nsData.bytes?.readBytes(nsData.length.toInt())

We also need convert ByteArray to NSData, we do it like this:

byteArray.usePinned {
    origin.imageData = NSData.dataWithBytes(it.addressOf(0), it.get().size.toULong())
}

Is this is the right way?

[benasher44]

Looks right to me! Prob a good question for the multiplatform Kotlin slack channel

[olonho]

 val d = memScoped {  NSData.create(bytes = "Hello".cstr.ptr, length = 5u) }
 val b = ByteArray(d.length.toInt()).apply {
        usePinned {
                memcpy(it.addressOf(0), d.bytes, d.length)
        }
  }
println(b.stringFromUtf8())