AOO410/main/fpicker/source/win32/misc/AutoBuffer.hxx

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#ifndef _AUTO_BUFFER_HXX_
#define _AUTO_BUFFER_HXX_

//------------------------------------------------------------------------
// includes
//------------------------------------------------------------------------

#include <sal/types.h>
#include <rtl/ustring.hxx>

//-------------------------------------------------------------
// A simple unicode buffer management class, the class itself 
// is responsible for the allocated unicode buffer, any 
// modification of the buffer size outside the class may lead 
// to undefined behaviour
//-------------------------------------------------------------

class CAutoUnicodeBuffer
{
public:

	// if bLazyCreation is true the buffer will be created
	// when someone wants to fill the buffer
	CAutoUnicodeBuffer( size_t size, sal_Bool bLazyCreation = sal_False );
	~CAutoUnicodeBuffer( );

	// resizes the buffer
	sal_Bool SAL_CALL resize( size_t new_size );

	// zeros the buffer
	void SAL_CALL empty( );

	// fills the buffer with a given content
	sal_Bool SAL_CALL fill( const sal_Unicode* pContent, size_t nLen );

	// returns the size of the buffer
	size_t SAL_CALL size( ) const;
	
	// conversion operator
	operator sal_Unicode*( );
	
	// address operator
	sal_Unicode* operator&( );
	
	const sal_Unicode* operator&( ) const;

private:
	void SAL_CALL init( );

private:
	size_t m_buffSize; // the number of unicode chars	
	sal_Unicode* m_pBuff;
};

#endif