GlueGen Struct [1]: Enhance com.jogamp.common.nio.* to serve a most native-free-code Struct-Code generation

Recfactored all NIO buffer utils to Buffers, i.e. buffer <-> address, memcpy, strnlen, etc

Buffers:
- Added copyNativeToDirectByteBuffer(..), allowing to copy a native memory slice into a direct buffer.
- Added typeNameToBufferClass(String) and sizeOfBufferElem(Class<? extends Buffer>)
- Completed slize2<Type>(..) buffer-mapping methods
- Exposure of safe getDirectByteBuffer(..) w/ null-check (package private)

Added NativeBuffer.storeDirectAddress(..), allowing to write the array address into a native buffer (struct, etc),
allowing to referencing the ElementBuffer (linear array of elements) and PointerBuffer (array of pointer).
Hint: This can be read via PointerBuffer.wrap(..).get(0)

Added ElementBuffer (a NativeBuffer) mapping an array of elements,
completing native abstraction next to PointerBuffer (array of pointer).

ElementBuffer can dereference an existing element-array by native address via ElementBuffer.derefPointer(..).
Views of its content can be directly accessed via ElementBuffer.slice(..).

+++

These utilities and buffer abstractions will allow to reuse code and simplify the GlueGen struct get/set implementations
and help to reduce native code injection.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java b/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
index db8c157..34cd925 100644
--- a/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
+++ b/src/junit/com/jogamp/gluegen/test/junit/generation/BaseClass.java
@@ -28,6 +28,7 @@
 
 package com.jogamp.gluegen.test.junit.generation;
 
+import com.jogamp.common.nio.AbstractBuffer;
 import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.common.os.MachineDataInfo;
@@ -465,8 +466,8 @@ public class BaseClass extends SingletonJunitCase {
         return pb;
     }
     PointerBuffer safeByteBuffer2PointerBuffer(final ByteBuffer bb, final int elements) {
-        Assert.assertEquals("ByteBuffer capacity not PointerBuffer ELEMENT_SIZE * "+elements, elements * PointerBuffer.ELEMENT_SIZE, bb.capacity());
-        Assert.assertEquals("ByteBuffer remaining not PointerBuffer ELEMENT_SIZE * "+elements, elements * PointerBuffer.ELEMENT_SIZE, bb.remaining());
+        Assert.assertEquals("ByteBuffer capacity not PointerBuffer POINTER_SIZE * "+elements, elements * AbstractBuffer.POINTER_SIZE, bb.capacity());
+        Assert.assertEquals("ByteBuffer remaining not PointerBuffer POINTER_SIZE * "+elements, elements * AbstractBuffer.POINTER_SIZE, bb.remaining());
         return validatePointerBuffer(PointerBuffer.wrap(bb), elements);
     }
 
@@ -849,7 +850,7 @@ public class BaseClass extends SingletonJunitCase {
               Assert.assertEquals(l0, l1);
               Assert.assertEquals(l0, l2);
 
-              final ByteBuffer bb = Buffers.newDirectByteBuffer(PointerBuffer.ELEMENT_SIZE);
+              final ByteBuffer bb = Buffers.newDirectByteBuffer(AbstractBuffer.POINTER_SIZE);
               for(int j=0; j<bb.limit(); j++) {
                   bb.put(j, (byte)(0xAA+j));
               }