datadriven.storage source code

1 module datadriven.storage;
2 
3 import datadriven.api;
4 import cbor;
5 
6 struct HashmapComponentStorage(ComponentType)
7 {
8 	private ComponentType[EntityId] components;
9 
10 	void add(EntityId eid, ComponentType component)
11 	{
12 		//assert(eid !in components);
13 		components[eid] = component;
14 	}
15 
16 	void remove(EntityId eid)
17 	{
18 		components.remove(eid);
19 	}
20 
21 	void removeAll()
22 	{
23 		components = null;
24 	}
25 
26 	size_t length() @property
27 	{
28 		return components.length;
29 	}
30 
31 	ComponentType* get(EntityId eid)
32 	{
33 		return eid in components;
34 	}
35 
36 	auto byKeyValue() @property
37 	{
38 		return components.byKeyValue;
39 	}
40 
41 	size_t serialize(ubyte[] sink)
42 	{
43 		size_t size = encodeCborMapHeader(sink[], components.length);
44 		foreach(keyValue; components.byKeyValue) {
45 			size += encodeCbor(sink[size..$], keyValue.key);
46 			size += encodeCbor(sink[size..$], keyValue.value);
47 		}
48 		return size;
49 	}
50 
51 	void deserialize(ubyte[] input)
52 	{
53 		components = null;//.clear(); //introduced in 2.071
54 		decodeCbor(input, components);
55 	}
56 }
57 
58 static assert(isComponentStorage!(HashmapComponentStorage!int, int));