PlainFile.h

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/* Copyright (C) 2000 KOM/Darmstadt University of Technology
 *
 * You are allowed to use all other parts of the code under the following terms:
 *
 * For non-commercial use, code may be used in unmodified form provided
 * that this copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * This software is provided "as is" and without any express or implied
 * warranties, including, without limitation, the implied warranty of
 * fitness for a particular purpose.
 *
 * The code may be subjected to the GNU General Public License, Version 2,
 * and re-distributed under the terms of this license.
 * As a special exception, permission is granted to link this code
 * with the Qt library and distribute executables, as long as you
 * follow the requirements of the GNU GPL in regard to all of the
 * software in the executable aside from Qt.
 *
 * Commercial use other than under the terms of the GNU General Public
 * License is allowed only after express negotiation of conditions
 * with the authors.
 */
#ifndef PLAINFILE_H
#define PLAINFILE_H

#include "sh/SHReturnCodes.h"

class MNRope;
namespace SH
{
    class SinkEndpoint;
};

class PlainReader
{
public:
    PlainReader( );

    virtual ~PlainReader();

    virtual int  getByte( ) = 0;

    int  getByte( unsigned char* dest );

    int  get2Bytes( unsigned char* dest );

    int  get3Bytes( unsigned char* dest );

    int  get4Bytes( unsigned char* dest );

    int  getByte( unsigned int& dest );

    int  get2Bytes( unsigned int& dest );

    int  get3Bytes( unsigned int& dest );

    int  get4Bytes( unsigned int& dest );

    int  addByte( unsigned int& dest );

    int  add2Bytes( unsigned int& dest );

    int  add3Bytes( unsigned int& dest );
};

class PlainFileReader : public PlainReader
{
    int            _fd;
    bool           _eof;
    unsigned char* _buffer;
    unsigned int   _bytes;
    unsigned int   _ptr;
    const size_t   _max;

public:
    PlainFileReader( int fd, size_t bufmax = 4096 );

    virtual ~PlainFileReader();

    int  getByte( );

    virtual bool eof() const;

    int fd() const;
};

class PlainRopeReader : public PlainReader
{
    SH::SinkEndpoint* _pull_here;
    MNRope*         _rope;
    size_t          _index;
    bool            _eof;
    const size_t    _max;

public:
    PlainRopeReader( SH::SinkEndpoint* pull_here, size_t bufmax = 4096 );

    virtual ~PlainRopeReader();

    int  getByte( );

    virtual bool eof() const;

    SH::SinkEndpoint* ep() const;
};

#endif /* PLAINFILE_H */

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