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introduce bitloops

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mike
2026-01-12 12:02:16 +01:00
parent b6351a6fb2
commit a0862fcc43
4 changed files with 170 additions and 101 deletions
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23
src/test/java/puzzle/MainTest.java
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@@ -37,12 +37,6 @@ public class MainTest {
@Test
void testStaticSlotMethods() {
// Test static offset extraction
// packedPos: offset(1, 1) at index 0, offset(2, 2) at index 1
var packedPos = ((long) Grid.offset(1, 1)) | (((long) Grid.offset(2, 2)) << 7);
assertEquals(Grid.offset(1, 1), Slot.offset(packedPos, 0));
assertEquals(Grid.offset(2, 2), Slot.offset(packedPos, 1));
// Test static horiz
// dir 2 (right) is horizontal
assertTrue(Slot.horiz(2));
@@ -56,21 +50,20 @@ public class MainTest {
grid.setClue(0, (byte) '2'); // right
var count = new AtomicInteger(0);
grid.forEachSlot((key, packedPos, len) -> {
grid.forEachSlot((key, lo, hi) -> {
count.incrementAndGet();
assertEquals(8, len);
assertEquals(0, Grid.r(Slot.offset(packedPos, 0)));
assertEquals(1, Grid.c(Slot.offset(packedPos, 0)));
assertEquals(8, Long.bitCount(lo) + Long.bitCount(hi));
assertEquals(0, Grid.r(Long.numberOfTrailingZeros(lo)));
assertEquals(1, Grid.c(Long.numberOfTrailingZeros(lo)));
});
assertEquals(1, count.get());
}
@Test
public void testHoriz() {
assertTrue(Slot.from(2, 0L, 1).horiz());
assertTrue(Slot.from(4, 0L, 1).horiz());
assertFalse(Slot.from(1, 0L, 1).horiz());
assertFalse(Slot.from(3, 0L, 1).horiz());
assertFalse(Slot.from(5, 0L, 1).horiz());
assertTrue(Slot.from(2, 0L, 0L).horiz());
assertTrue(Slot.from(4, 0L, 0L).horiz());
assertFalse(Slot.from(1, 0L, 0L).horiz());
assertFalse(Slot.from(3, 0L, 0L).horiz());
}
@Test
public void testGridBasics() {