text: //--------------------------------------------------------------------------------------
  // File: BinaryReader.h
  //
  // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
  // ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
  // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
  // PARTICULAR PURPOSE.
  //
  // Copyright (c) Microsoft Corporation. All rights reserved.
  //
  // http://go.microsoft.com/fwlink/?LinkId=248929
  //--------------------------------------------------------------------------------------
  
  #pragma once
  
  using namespace DirectXTK;
  
  #ifdef __cplusplus
  EXTERN_CC_BEGIN
  #endif
  
  namespace_DirectX
  
  // Helper for reading binary data, either from the filesystem a memory buffer.
  class DXTKAPI BinaryReader
  {
  public:
  	explicit BinaryReader(_In_z_ wchar_t const* fileName);
  	BinaryReader(_In_reads_bytes_(dataSize) uint8_t const* dataBlob, size_t dataSize);
  
  	// Reads a single value.
  	template<typename T> T const& Read()
  	{
  		return *ReadArray<T>(1);
  	}
  
  	// Reads an array of values.
  	template<typename T> T const* ReadArray(size_t elementCount)
  	{
  		static_assert(std::is_pod<T>::value, "Can only read plain-old-data types");
  
  		uint8_t const* newPos = mPos + sizeof(T)* elementCount;
  
  		if (newPos > mEnd)
  			throw std::exception("End of file");
  
  		auto result = reinterpret_cast<T const*>(mPos);
  
  		mPos = newPos;
  
  		return result;
  	}
  
  	// Lower level helper reads directly from the filesystem into memory.
  	static HRESULT ReadEntireFile(_In_z_ wchar_t const* fileName, _Inout_ std::unique_ptr<uint8_t[]>& data, _Out_ size_t* dataSize);
  
  private:
  	// The data currently being read.
  	uint8_t const* mPos;
  	uint8_t const* mEnd;
  
  	std::unique_ptr<uint8_t[]> mOwnedData;
  
  	// Prevent copying.
  	BinaryReader(BinaryReader const&);
  	BinaryReader& operator= (BinaryReader const&);
  };
  
  namespace_DirectX_end
  
  #ifdef __cplusplus
  EXTERN_CC_END
  #endif
  