Day 2 part 2

days/2/code.wat

@@ -47,7 +47,36 @@
   )
 
   (func (export "part2") (result i32)
-    i32.const 0
+    (local $currentScore i32)
+    (local $lastRead i32)
+    call $initRead
+
+    loop $readLoop
+      call $readLine
+
+      ;; check to see if we've hit the end
+      local.tee $lastRead
+      i32.eqz
+      if
+        call $initWrite
+
+        local.get $currentScore
+        call $writeNum
+        
+        call $closeWrite
+        return
+      end
+
+      local.get $lastRead
+      call $solveRound
+      call $getScore
+      local.get $currentScore
+      i32.add
+      local.set $currentScore
+      br $readLoop
+    end
+
+    unreachable
   )
 
   (func $initRead
@@ -88,6 +117,29 @@
     global.get $inputEnd
   )
 
+  (func $solveRound (param $theirs i32) (param $outcome i32) (result i32 i32)
+    (local $tmp i32)
+
+    local.get $outcome
+    i32.const 1
+    i32.add
+
+    local.get $theirs
+    i32.add
+    i32.const 3
+    i32.rem_s
+    local.tee $tmp
+
+    i32.eqz
+    if
+      i32.const 3
+      local.set $tmp
+    end
+
+    local.get $theirs
+    local.get $tmp
+  )
+
   (func $getScore (param $theirs i32) (param $ours i32) (result i32)
     (local $diff i32)