Add functions for operating on event streams

engine/CMakeLists.txt

@@ -154,6 +154,8 @@ set (CONTAINERS_HEADERS
 	core/containers/Vector.h
 	core/containers/RBTree.h
 	core/containers/IdTable.h
+	core/containers/IdArray.h
+	core/containers/EventStream.h
 )
 
 set (MATH_SRC

engine/Crown.h

@@ -63,6 +63,8 @@ OTHER DEALINGS IN THE SOFTWARE.
 #include "Queue.h"
 #include "PriorityQueue.h"
 #include "IdTable.h"
+#include "IdArray.h"
+#include "EventStream.h"
 
 // Core/Strings
 #include "StringUtils.h"

engine/core/containers/EventStream.h

@@ -0,0 +1,68 @@
+/*
+Copyright (c) 2013 Daniele Bartolini, Michele Rossi
+Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#pragma once
+
+#include "Assert.h"
+#include "Allocator.h"
+#include "List.h"
+
+namespace crown
+{
+
+typedef List<char> EventStream;
+
+/// Functions for operating on a List<char> as a stream of events of the form:
+/// [event_header_0][event_data_0][event_header_1][event_data_1] ...
+namespace event_stream
+{
+
+struct Header
+{
+	uint32_t type;
+	uint32_t size;
+};
+
+/// Appends the @a event of the given @a type and @a size to the stream @a s. 
+inline void write(EventStream& s, uint32_t type, uint32_t size, const void* event)
+{
+	Header header;
+	header.type = type;
+	header.size = size;
+
+	s.push((char*) &header, sizeof(Header));
+	s.push((char*) event, (size_t) header.size);
+}
+
+/// Appends the @a event of the given @a type to the stream @a s
+template <typename T>
+inline void write(EventStream& s, uint32_t type, const T& event)
+{
+	event_stream::write(s, type, sizeof(T), &event);
+}
+
+} // namespace event_stream
+} // namespace crown