From 01ff3962b5a2aac760aef7aa03288795c8be1e12 Mon Sep 17 00:00:00 2001
From: Mergul <wismerchil@interia.eu>
Date: Tue, 18 Jun 2019 20:12:18 +0200
Subject: [PATCH] -added SimpleVector (vector with only ubyte data) -components
 adding and removing now use SimpleVector (optimalization)

---
 source/ecs/manager.d       |  6 ++--
 source/ecs/simple_vector.d | 66 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 2 deletions(-)
 create mode 100644 source/ecs/simple_vector.d

diff --git a/source/ecs/manager.d b/source/ecs/manager.d
index 140d8f2..f2df314 100644
--- a/source/ecs/manager.d
+++ b/source/ecs/manager.d
@@ -20,6 +20,7 @@ import ecs.hash_map;
 import ecs.id_manager;
 import ecs.system;
 import ecs.vector;
+import ecs.simple_vector;
 import ecs.events;
 import ecs.traits;
 
@@ -1387,7 +1388,7 @@ export class EntityManager
         data.change_entities_list.add(0);
         data.change_entities_list.add((cast(ubyte*)&entity_id)[0 .. EntityID.sizeof]);
         data.change_entities_list.add((cast(ubyte*)&num)[0 .. uint.sizeof]);
-        data.change_entities_list.add(cast(ubyte[]) del_ids);
+        data.change_entities_list.add((cast(ubyte*)del_ids.ptr)[0 .. num * 2]);
     }
 
     private void __removeComponents(EntityID entity_id, ushort[] del_ids)
@@ -2685,7 +2686,8 @@ export class EntityManager
     struct ThreadData
     {
         Vector!EntityID entities_to_remove;
-        Vector!ubyte change_entities_list;
+        //Vector!ubyte change_entities_list;
+        SimpleVector change_entities_list;
         Vector!(EntitiesBlock*) blocks_to_update;
     }
 
diff --git a/source/ecs/simple_vector.d b/source/ecs/simple_vector.d
new file mode 100644
index 0000000..1751040
--- /dev/null
+++ b/source/ecs/simple_vector.d
@@ -0,0 +1,66 @@
+module ecs.simple_vector;
+
+import std.experimental.allocator;
+import std.experimental.allocator.mallocator;
+
+import core.stdc.string;
+
+struct SimpleVector
+{
+
+    @disable this(this);
+
+    void add(ubyte el) nothrow @nogc
+    {
+        while(used >= data.length)
+        {
+            if(data is null)data = Mallocator.instance.makeArray!ubyte(1024);
+            else Mallocator.instance.expandArray(data,data.length);
+        }
+        data[used++] = el;
+    }
+
+    void add(ubyte[] el) nothrow @nogc
+    {
+        while(used + el.length >= data.length)
+        {
+            if(data is null)data = Mallocator.instance.makeArray!ubyte(1024);
+            else Mallocator.instance.expandArray(data,data.length);
+        }
+        memcpy(data.ptr + used, el.ptr, el.length);
+        used += el.length;
+    }
+
+    size_t length() nothrow @nogc
+    {
+        return used;
+    }
+
+    export ref ubyte opIndex(size_t pos) nothrow @nogc
+    {
+		return data[pos];
+	}
+
+	export ubyte[] opSlice() nothrow @nogc
+    {
+		return data[0 .. used];
+	}
+
+	export ubyte[] opSlice(size_t x, size_t y) nothrow @nogc
+    {
+		return data[x .. y];
+	}
+
+	export size_t opDollar() nothrow @nogc
+    {
+		return used;
+	}
+
+    void clear() nothrow @nogc
+    {
+        used = 0;
+    }
+
+    ubyte[] data = null;
+    size_t used = 0;
+}
\ No newline at end of file