add FarPointer.set and WirePointer.setOffsetAndKind. unit tests pass

compiler/src/test/scala/org/capnproto/EncodingTest.scala

@@ -18,7 +18,13 @@ class EncodingSuite extends FunSuite {
     val message = new MessageBuilder(5, BuilderArena.AllocationStrategy.FIXED_SIZE);
     val allTypes = message.initRoot(TestAllTypes.Builder.factory);
     TestUtil.initTestMessage(allTypes);
-    //TestUtil.checkTestMessage(allTypes);
+
+    TestUtil.checkTestMessage(allTypes);
   }
 
+  // to debug, do this:
+  //Serialize.writeMessage((new java.io.FileOutputStream("/Users/dwrensha/Desktop/test.dat")).getChannel(),
+  //                       message);
+
+
 }

compiler/src/test/scala/org/capnproto/TestUtil.scala

@@ -21,6 +21,7 @@ object TestUtil {
     builder.setTextField(new Text.Reader("foo"));
 //    builder.setDataField(data("bar"));
     {
+
       val subBuilder = builder.initStructField();
       subBuilder.setVoidField(org.capnproto.Void.VOID);
       subBuilder.setBoolField(true);
@@ -44,7 +45,6 @@ object TestUtil {
     }
 
     builder.setEnumField(TestEnum.CORGE);
-
     builder.initVoidList(6);
 
   }

runtime/src/main/java/org/capnproto/FarPointer.java

@@ -18,4 +18,9 @@ final class FarPointer {
     public static void setSegmentId(ByteBuffer buffer, int offset, int segmentId) {
         buffer.putInt(8 * offset + 4, segmentId);
     }
+
+    public static void set(ByteBuffer buffer, int offset, boolean isDoubleFar, int pos) {
+        int idf = isDoubleFar ? 1 : 0;
+        WirePointer.setOffsetAndKind(buffer, offset, (pos << 3) | (idf << 2) | WirePointer.FAR);
+    }
 }

runtime/src/main/java/org/capnproto/WireHelpers.java

@@ -38,7 +38,7 @@ final class WireHelpers {
 
             //# Set up the original pointer to be a far pointer to
             //# the new segment.
-            WirePointer.setKindAndTarget(segment.buffer, refOffset, WirePointer.FAR, allocation.offset);
+            FarPointer.set(segment.buffer, refOffset, false, allocation.offset);
             FarPointer.setSegmentId(segment.buffer, refOffset, allocation.segment.id);
 
             //# Initialize the landing pad to indicate that the

runtime/src/main/java/org/capnproto/WirePointer.java

@@ -29,6 +29,10 @@ final class WirePointer {
                       (((targetOffset - offset) - 1) << 2) | kind);
     }
 
+    public static void setOffsetAndKind(ByteBuffer buffer, int offset, int offsetAndKind) {
+        buffer.putInt(offset * 8, offsetAndKind);
+    }
+
     public static int inlineCompositeListElementCount(long wirePointer) {
         return offsetAndKind(wirePointer) >>> 2;
     }