Merge pull request #1965 from bugsnag/PLAT-11483/native-event-decoder…

…-skeleton

Add the skeleton NativeEventDecoder

bugsnag-plugin-android-ndk/src/main/java/com/bugsnag/android/ndk/ByteBufferExtensions.kt

@@ -0,0 +1,11 @@
+package com.bugsnag.android.ndk
+
+import java.nio.ByteBuffer
+
+internal fun ByteBuffer.getNativeInt(): Int = getInt()
+internal fun ByteBuffer.getNativeLong(): Long = getLong()
+
+internal fun ByteBuffer.getCString(byteCount: Int): String {
+    position(position() + byteCount)
+    return ""
+}

bugsnag-plugin-android-ndk/src/main/java/com/bugsnag/android/ndk/NativeEventDecoder.kt

@@ -0,0 +1,31 @@
+package com.bugsnag.android.ndk
+
+import androidx.annotation.VisibleForTesting
+import com.bugsnag.android.Event
+import java.io.File
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.nio.channels.FileChannel
+
+internal object NativeEventDecoder {
+    fun decode(
+        event: File,
+        @Suppress("UNUSED_PARAMETER")
+        staticData: File = File(event.parentFile, event.name + ".static_data.json")
+    ): Event {
+        return event.inputStream().channel.use {
+            // mmap the entire file in READ_ONLY mode
+            val eventBytes = it.map(FileChannel.MapMode.READ_ONLY, 0L, event.length())
+            decodeEventFromBytes(eventBytes)
+        }
+    }
+
+    @VisibleForTesting
+    internal fun decodeEventFromBytes(
+        eventBytes: ByteBuffer
+    ): Event {
+        eventBytes.order(ByteOrder.nativeOrder())
+        @Suppress("StopShip") // This is targeting an integration branch
+        TODO("To be completed")
+    }
+}