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  // Copyright (c) 2008-2013 NVIDIA Corporation. All rights reserved.
  // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
  // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
  
  
  #ifndef PX_PHYSICS_EXTENSIONS_DEFAULT_STREAMS_H
  #define PX_PHYSICS_EXTENSIONS_DEFAULT_STREAMS_H
  /** \addtogroup extensions
    @{
  */
  
  #include <stdio.h>
  #include "common/PxPhysXCommon.h"
  #include "common/PxIO.h"
  #include "foundation/PxFoundation.h"
  
  namespace physx
  {
  
  /** 
  \brief default implementation of a memory write stream
  
  @see PxOutputStream
  */
  
  class PxDefaultMemoryOutputStream: public PxOutputStream
  {
  public:
  						PxDefaultMemoryOutputStream(PxAllocatorCallback &allocator = PxGetFoundation().getAllocatorCallback());
  	virtual				~PxDefaultMemoryOutputStream();
  
  	virtual	PxU32		write(const void* src, PxU32 count);
  
  	virtual	PxU32		getSize()	const	{	return mSize; }
  	virtual	PxU8*		getData()	const	{	return mData; }
  
  private:
  		PxDefaultMemoryOutputStream(const PxDefaultMemoryOutputStream&);
  		PxDefaultMemoryOutputStream& operator=(const PxDefaultMemoryOutputStream&);
  
  		PxAllocatorCallback&	mAllocator;
  		PxU8*					mData;
  		PxU32					mSize;
  		PxU32					mCapacity;
  };
  
  /** 
  \brief default implementation of a memory read stream
  
  @see PxInputData
  */
  	
  class PxDefaultMemoryInputData: public PxInputData
  {
  public:
  						PxDefaultMemoryInputData(PxU8* data, PxU32 length);
  
  	virtual		PxU32	read(void* dest, PxU32 count);
  	virtual		PxU32	getLength() const;
  	virtual		void	seek(PxU32 pos);
  	virtual		PxU32	tell() const;
  
  private:
  		PxU32		mSize;
  		const PxU8*	mData;
  		PxU32		mPos;
  };
  
  
  
  /** 
  \brief default implementation of a file write stream
  
  @see PxOutputStream
  */
  
  class PxDefaultFileOutputStream: public PxOutputStream
  {
  public:
  						PxDefaultFileOutputStream(const char* name);
  	virtual				~PxDefaultFileOutputStream();
  
  	virtual		PxU32	write(const void* src, PxU32 count);
  	virtual		bool	isValid();
  private:
  		FILE*		mFile;
  };
  
  
  /** 
  \brief default implementation of a file read stream
  
  @see PxInputData
  */
  
  class PxDefaultFileInputData: public PxInputData
  {
  public:
  						PxDefaultFileInputData(const char* name);
  	virtual				~PxDefaultFileInputData();
  
  	virtual		PxU32	read(void* dest, PxU32 count);
  	virtual		void	seek(PxU32 pos);
  	virtual		PxU32	tell() const;
  	virtual		PxU32	getLength() const;
  				
  				bool	isValid() const;
  private:
  		FILE*		mFile;
  		PxU32		mLength;
  };
  }
  
  /** @} */
  
  #endif
  