diff xmit of animation queues. Also, StreamBuffer::unwrite_to

luprex/core/cpp/animqueue.hpp

@@ -95,6 +95,20 @@ public:
 
     void clear();
 
+    // ExactlyEqual compares all fields.
+    bool exactly_equal(const AnimStep &other) const;
+
+    // LogicallyEqual only compares fields whose HAS_XXX bits are set.
+    bool logically_equal(const AnimStep &other) const;
+
+    // StateEqual is true if the plane, graphic, facing, and xyz match.
+    bool state_equal(const AnimStep &other) const;
+
+    // read/write the step using a stream buffer.
+    //
+    void write_into(StreamBuffer *sb) const;
+    void read_from(StreamBuffer *sb);
+
     // Create an AnimStep from a lua table.
     //
     // Lua stack must contain a table, which may contain:
@@ -111,6 +125,9 @@ public:
     //
     void from_lua(lua_State *L, int idx, const AnimStep &qback);
 
+    // Make this step into a first-step of an anim queue.
+    void keep_state_only();
+    
     // For any values that are unchanged in this step,
     // echo the values of the previous step.
     void echo(const AnimStep &prev);
@@ -127,6 +144,8 @@ private:
 public:    
     AnimQueue();
     
+    bool exactly_equal(const AnimQueue &aq) const;
+
     const AnimStep &nth(int n) const { return steps_[n]; }
     size_t size() const { return steps_.size(); }
     int32_t size_limit() const { return size_limit_; }
@@ -147,6 +166,15 @@ public:
     void serialize(StreamBuffer *sb);
     void deserialize(StreamBuffer *sb);
 
+    // Difference transmission
+    //
+    // make_patch will emit zero bytes when there are no differences.
+    // make_patch does not put a 'length' field for the patch as a whole.
+    // apply_patch must receive a patch followed by eof.
+    //
+    void make_patch(const AnimQueue &auth, StreamBuffer *sb) const;
+    void apply_patch(StreamBuffer *sb);
+
     // Get the final resting place after all animations are complete.
     const AnimStep &back() const;
 
@@ -154,7 +182,7 @@ public:
     void set_size_limit(int32_t n);
 
     // (For testing): make sure the invariants are preserved.
-    bool valid();
+    bool valid() const;
 };
 
 #endif // ANIMQUEUE_HPP