introduce bitloops

src/test/java/puzzle/ExportFormatTest.java

@@ -1,5 +1,6 @@
 package puzzle;
 
+import lombok.AllArgsConstructor;
 import lombok.val;
 import org.junit.jupiter.api.Test;
 import puzzle.Export.Clued;
@@ -9,11 +10,13 @@ import puzzle.Export.PuzzleResult;
 import puzzle.Export.Rewards;
 import puzzle.SwedishGenerator.FillResult;
 import puzzle.SwedishGenerator.Rng;
+import puzzle.SwedishGeneratorTest.Idx;
 import java.io.IOException;
 import java.nio.file.Paths;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static puzzle.ExportFormatTest.Clue.RIGHT;
 import static puzzle.SwedishGenerator.C;
 import static puzzle.SwedishGenerator.Clues;
 import static puzzle.SwedishGenerator.FillStats;
@@ -35,19 +38,33 @@ public class ExportFormatTest {
    static final byte CLUE_UP    = 2;
    static final byte CLUE_LEFT  = 3;
    
+   @AllArgsConstructor
+   enum Clue {
+      DOWN(CLUE_DOWN),
+      RIGHT(CLUE_RIGHT),
+      UP(CLUE_UP),
+      LEFT(CLUE_LEFT);
+      Clue(byte dir) {
+         this.dir     = dir;
+         this.clueDir = dir;
+      }
+      final byte dir;
+      final int  clueDir;
+   }
+   
    @Test
    void testExportFormatFromFilled() {
       var swe = new SwedishGenerator(new Rng(0), new int[STACK_SIZE], Clues.createEmpty());
       
       val clues = Clues.createEmpty();
       // Place a RIGHT clue at (0,0)
-      clues.setClue(0, CLUE_RIGHT);
+      clues.setClueLo(Idx.IDX_0_0.lo, RIGHT.dir);
       // This creates a slot starting at (0,1)
       // Terminate the slot at (0,5) with another digit to avoid it extending to MAX_WORD_LENGTH
-      clues.setClue(OFF_0_5, CLUE_LEFT);
+      clues.setClueLo(Idx.IDX_0_5.lo, CLUE_LEFT);
       var grid = new Gridded(clues.toGrid());
       
-      var clueMap = new long[300];
+      var clueMap = new long[SwedishGenerator.CLUE_INDEX_MAX_SIZE];
       // key = (cellIndex << 2) | (direction)
       var key = Slot.packSlotKey(0, CLUE_RIGHT);
       var lo  = (1L << OFF_0_1) | (1L << OFF_0_2) | (1L << OFF_0_3) | (1L << OFF_0_4);