Diff xmit of ID player pools

luprex/core/cpp/idalloc.hpp

@@ -153,9 +153,6 @@ public:
     // Refill the fifo of batches from the global pool.
     void refill();
 
-    // Discard all batches in the fifo.  This is only for unit testing.
-    void purge();
-
     // Get a batch from the fifo.  Also refills the fifo.
     int64_t get_batch();
 
@@ -171,10 +168,33 @@ public:
     // Return the size of the queue.
     int size() { return ranges_.size(); }
 
+    // Return true if the two pools are identical.
+    bool exactly_equal(const IdPlayerPool &other) const;
+    
+    // Check that the pool is valid.
+    bool valid() const;
+
+    // unit testing functions.
+    //
+    // These let you manipulate the deque explicitly.  But that's
+    // only useful for unit testing.
+    //
+    void test_push_back(int64_t range);
+    void test_pop_front();
+    void test_clear_ranges();
+
     // Serialize to or deserialize from a streambuffer.
     // Caution: the pointer to the global pool is not serialized or deserialized.
     void serialize(StreamBuffer *sb);
     void deserialize(StreamBuffer *sb);
+
+    // Difference transmission
+    //
+    // When there are no differences, make_patch returns false but
+    // still writes out a valid patch.
+    //
+    bool make_patch(const IdPlayerPool &auth, StreamBuffer *sb) const;
+    void apply_patch(StreamBuffer *sb);
 };
 
 #endif // IDALLOC_HPP