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Source/Engine/Serialization/MemoryReadStream.cpp

@@ -0,0 +1,59 @@
+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "MemoryReadStream.h"
+
+MemoryReadStream::MemoryReadStream()
+    : _buffer(nullptr)
+    , _position(nullptr)
+    , _length(0)
+{
+}
+
+MemoryReadStream::MemoryReadStream(const byte* bytes, uint32 length)
+    : _buffer(bytes)
+    , _position(bytes)
+    , _length(length)
+{
+}
+
+void MemoryReadStream::Init(const byte* bytes, uint32 length)
+{
+    _buffer = _position = bytes;
+    _length = length;
+}
+
+void MemoryReadStream::Flush()
+{
+}
+
+void MemoryReadStream::Close()
+{
+    _position = _buffer = nullptr;
+    _length = 0;
+}
+
+uint32 MemoryReadStream::GetLength()
+{
+    return _length;
+}
+
+uint32 MemoryReadStream::GetPosition()
+{
+    return static_cast<uint32>(_position - _buffer);
+}
+
+void MemoryReadStream::SetPosition(uint32 seek)
+{
+    ASSERT(_length > 0);
+    _position = _buffer + seek;
+}
+
+void MemoryReadStream::ReadBytes(void* data, uint32 bytes)
+{
+    if (bytes > 0)
+    {
+        ASSERT(data && GetLength() - GetPosition() >= bytes);
+        Platform::MemoryCopy(data, _position, bytes);
+        _position += bytes;
+    }
+}