/usr/include/crystalspace-2.0/csutil/memfile.h is in libcrystalspace-dev 2.0+dfsg-1build1.
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Copyright (C) 2000 by Eric Sunshine <sunshine@sunshineco.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_MEMFILE_H__
#define __CS_MEMFILE_H__
/**\file
* File interface to memory buffer
*/
#include "csextern.h"
#include "csutil/scf_implementation.h"
#include "iutil/vfs.h"
/**
* Essentially a raw memory buffer which implements the abstract iFile
* interface.
*/
class CS_CRYSTALSPACE_EXPORT csMemFile :
public scfImplementation1<csMemFile, iFile>
{
public:
/// Disposition of memory buffer at destruction time.
enum Disposition
{
/// Deallocate with delete[].
DISPOSITION_DELETE,
/// Deallocate with platform_free().
DISPOSITION_PLATFORM_FREE,
/// Ignore; assume that outside agent owns buffer.
DISPOSITION_IGNORE,
/// Deallocate with cs_free().
DISPOSITION_CS_FREE,
#ifndef CS_NO_MALLOC_OVERRIDE
/**
* Deallocate with platform_free() or cs_free(), depending on whether
* malloc override is disabled or not.
*/
DISPOSITION_FREE = DISPOSITION_CS_FREE
#else
DISPOSITION_FREE = DISPOSITION_PLATFORM_FREE
#endif
};
public:
/// Construct an empty memory file.
csMemFile();
/// Construct a memory file from an existing memory buffer but do not free.
csMemFile(const char*, size_t);
/**
* Construct a memory file from an existing memory buffer and free later.
* Note that when writing to the buffer, the original buffer may be
* discarded and a new one created due required resizing.
*/
csMemFile(char*, size_t, Disposition = DISPOSITION_DELETE);
/**
* Construct a memory file from an existing data buffer.
* \param buf The data buffer to use.
* \param readOnly Whether to treat the buffer as read-only. If \p true,
* writing to the memory file will create a copy of the buffer. If
* \p false, changes will affect the buffer. Note that when writing to the
* buffer, the original buffer may be discarded and a new one created due
* required resizing.
*/
csMemFile(iDataBuffer* buf, bool readOnly);
/// Destructor
virtual ~csMemFile();
/// Returns "#csMemFile"
virtual const char* GetName();
virtual size_t GetSize();
virtual int GetStatus();
virtual size_t Read(char* Data, size_t DataSize);
virtual size_t Write(const char* Data, size_t DataSize);
virtual void Flush();
virtual bool AtEOF();
virtual size_t GetPos();
virtual bool SetPos(size_t newpos);
virtual csPtr<iDataBuffer> GetAllData (bool nullterm = false);
csPtr<iDataBuffer> GetAllData (CS::Memory::iAllocator*);
csPtr<iFile> GetPartialView (size_t offset, size_t size = (size_t)~0);
/**
* Returns a pointer to the memory buffer. May return 0 if memory file
* is empty. Use GetSize() for size info.
*/
virtual const char* GetData() const;
size_t GetDataSize () const { return size; }
/// Make file empty.
void Empty();
protected:
csRef<iDataBuffer> buffer;
int status;
size_t size;
size_t cursor;
bool copyOnWrite;
bool readOnly;
};
#endif // __CS_MEMFILE_H__
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