Core: Add ByteArrayPool and PoolByteStream classes

src/Nazara/Core/ByteStream.cpp

@@ -68,7 +68,7 @@ namespace Nz
 
 	void ByteStream::SetStream(ByteArray* byteArray, OpenModeFlags openMode)
 	{
-		std::unique_ptr<Stream> stream(new MemoryStream(byteArray, openMode));
+		std::unique_ptr<MemoryStream> stream = std::make_unique<MemoryStream>(byteArray, openMode);
 
 		SetStream(stream.get());
 		// SetStream reset our smart pointer, set it after calling it
@@ -86,7 +86,7 @@ namespace Nz
 
 	void ByteStream::SetStream(void* ptr, Nz::UInt64 size)
 	{
-		std::unique_ptr<Stream> stream(new MemoryView(ptr, size));
+		std::unique_ptr<MemoryView> stream = std::make_unique<MemoryView>(ptr, size);
 
 		SetStream(stream.get());
 		// SetStream reset our smart pointer, set it after calling it
@@ -104,7 +104,7 @@ namespace Nz
 
 	void ByteStream::SetStream(const void* ptr, Nz::UInt64 size)
 	{
-		std::unique_ptr<Stream> stream(new MemoryView(ptr, size));
+		std::unique_ptr<MemoryView> stream = std::make_unique<MemoryView>(ptr, size);
 
 		SetStream(stream.get());
 		// SetStream reset our smart pointer, set it after calling it

src/Nazara/Core/PoolByteStream.cpp

@@ -0,0 +1,40 @@
+// Copyright (C) 2017 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/PoolByteStream.hpp>
+#include <Nazara/Core/ByteArrayPool.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	/*!
+	* \ingroup core
+	* \class Nz::PoolByteStream
+	* \brief ByteStream allocated using a pool
+	*/
+
+	void PoolByteStream::Reset()
+	{
+		if (m_buffer.GetCapacity() > 0)
+		{
+			m_pool.ReturnByteArray(std::move(m_buffer));
+			m_buffer.Clear(false);
+		}
+
+		SetStream(static_cast<Nz::Stream*>(nullptr));
+	}
+
+	void PoolByteStream::Reset(std::size_t capacity)
+	{
+		if (m_buffer.GetCapacity() < capacity)
+			m_buffer = m_pool.GetByteArray(capacity);
+
+		SetStream(&m_buffer, Nz::OpenMode_ReadWrite);
+	}
+
+	void PoolByteStream::OnEmptyStream()
+	{
+		Reset(0);
+	}
+}