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aflibBufferDev.h

Go to the documentation of this file.

/*
 * Copyright: (C) 2000-2001 Bruce W. Forsberg
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or 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
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 *   Bruce Forsberg  forsberg@tns.net
 *
 */

#ifndef _AFLIBBUFFERDEV_H
#define _AFLIBBUFFERDEV_H



class aflibBufferDev {

public:

   aflibBufferDev();

   ~aflibBufferDev();

   bool
   init(
      int buf_size);

   inline
   int
   getBufferSize() const {return(_buf_size);};

   inline
   int
   bytes_available()
   {
      int bytes_avail;

      if (_w_ptr >= _r_ptr)
         bytes_avail = _w_ptr - _r_ptr;
      else
         bytes_avail = _buf_size - (_r_ptr - _w_ptr);

      return(bytes_avail);
   };

   void
   write(
      unsigned char * buf,
      int             num_bytes);

   void
   read(
      unsigned char * buf,
      int             num_bytes);

private:

unsigned char *  _buf_ptr;
unsigned char *  _end_ptr;
unsigned char *  _w_ptr;
unsigned char *  _r_ptr;
int              _buf_size;


};


#endif

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