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85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
/*****************************************************************************
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* Author: Valient Gough <vgough@pobox.com>
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*
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*****************************************************************************
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* Copyright (c) 2004, Valient Gough
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*
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* This library is free software; you can distribute it and/or modify it under
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* the terms of the GNU General Public License (GPL), as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GPL in the file COPYING for more
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* details.
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*/
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#ifndef _FileIO_incl_
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#define _FileIO_incl_
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#include "encfs.h"
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#include <inttypes.h>
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#include "Interface.h"
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struct IORequest
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{
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off_t offset;
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// amount of bytes to read/write.
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int dataLen;
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unsigned char *data;
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IORequest();
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};
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inline IORequest::IORequest()
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: offset(0)
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, dataLen(0)
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, data(0)
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{
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}
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class FileIO
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{
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public:
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FileIO();
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virtual ~FileIO();
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virtual rel::Interface interface() const =0;
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// default implementation returns 1, meaning this is not block oriented.
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virtual int blockSize() const;
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virtual void setFileName(const char *fileName) =0;
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virtual const char *getFileName() const =0;
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// Not sure about this -- it is specific to CipherFileIO, but the
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// alternative methods of exposing this interface aren't much nicer..
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virtual bool setIV( uint64_t iv );
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// open file for specified mode. There is no corresponding close, so a
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// file is open until the FileIO interface is destroyed.
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virtual int open( int flags ) =0;
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// get filesystem attributes for a file
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virtual int getAttr( struct stat *stbuf ) const =0;
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virtual off_t getSize( ) const =0;
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virtual ssize_t read( const IORequest &req ) const =0;
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virtual bool write( const IORequest &req ) =0;
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virtual int truncate( off_t size ) =0;
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virtual bool isWritable() const =0;
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private:
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// not implemented..
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FileIO( const FileIO & );
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FileIO &operator = ( const FileIO & );
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};
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#endif
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