mldirectxerror.h

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///////////////////////////////////////////////////////////////////////////////
// 
// File: mlDirectXError.h
// 
// Author: Frank Luna (C) All Rights Reserved
//
// System: Athlon 1800+ XP, 512 DDR, Radeon 9500 Pro, Windows XP, MSVC++ 7.0 
//
// Desc: Contains exception classes for handling DirectX errors.
//       
///////////////////////////////////////////////////////////////////////////////

#ifndef __mlDirectXErrorH__
#define __mlDirectXErrorH__

#include "mlWinAppUtility.h"

namespace dx_err
{
	class DirectXError
	{
	public:
		DirectXError();
		DirectXError(HRESULT& hrCode, cstring& filename, uint32& lineNum);

		cstring& getHRCode();
		cstring& getFilename();
		cstring& getLineNum();

		std::string getFullError();

	private:
		std::string _hrCode;
		std::string _filename;
		std::string _lineNum;
	};

	inline void ThrowDxErr(HRESULT hr, cstring& filename, uint32 lineNum)
	{
		if(FAILED(hr))
		{
			throw DirectXError(hr, filename, lineNum);
		}
	}

	// We do not want the client to have to enter in the __FILE__ and __LINE__
	// macros everytime.  So we provide a simpler interface.  Note that we must
	// use a macro, instead of a function, since __FILE__ and __LINE__ are
	// relative to the file they are called in.  So we need the macro to be
	// expanded in the actual file we write THROW_DXERR.  If we used a function
	// __FILE__ and __LINE__ would be relative to this file "mlDirectXError.h".
	// Note: '#' operator, in '#hr' for example, returns the value of hr 
	// as a string.
	#define THROW_DXERR(hr) ThrowDxErr(hr, __FILE__, __LINE__);
}

#endif // __mlDirectXErrorH__