DCFsbistream.h

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// DCFsbistream.h
//////////////////////////////////////////////////////////////////////
//          (c) Copyright 2001-2002 Brown Deer Technology, LLC.
//                        All rights reserved.
//////////////////////////////////////////////////////////////////////

#ifndef DCFSBISTREAM_H
#define DCFSBISTREAM_H

#ifdef USE_STD
#include <iostream>
#include <string>
using namespace std;
#else
#include <iostream.h>
#include <string.h>
#endif

#include "DCFsbistreamBase.h"
#include "DCFencode.h"
#include "DCFmpacket.h"

template <class Data_t>
class DCFsbistream : public DCFsbistreamBase 
{
   public:
      DCFsbistream( istream& is = cin );
      ~DCFsbistream();
      void descr();
      virtual void open();
      DCFsbistream<Data_t>& operator>>( Data_t& );
      DCFencode<Data_t> _enc;
};

template < class Data_t >
DCFsbistream<Data_t>::DCFsbistream( istream& is) 
  : DCFsbistreamBase( is ) 
{
   _enctype = _enc.enctype();
   _encsizeb = _enc.encsizeb();
}

template < class Data_t >
DCFsbistream<Data_t>::~DCFsbistream() { }

template < class Data_t >
void DCFsbistream<Data_t>::descr() 
{
    DCFsbistreamBase::descr();
    _enc.descr();
}

template < class Data_t >
void DCFsbistream<Data_t>::open() 
{
   DCFsbistreamBase::open();
   (*_is) >> _enc;
}

template < class Data_t >
DCFsbistream<Data_t>& DCFsbistream<Data_t>::operator>>( Data_t& x) 
{
   DCFmpacket<Data_t> mp( DCF_DEFAULT_MPACKET, _bplen_sizeb, _bplen_n,_enc );
   int m = x.imcycle();
   bool bob = ( m == x.mmax() );

#ifdef STORM_DEBUG
   cout << "DCFsbistream<Data_t>::operator>>(): m bob "
        << m << ' ' << bob << '\n';
#endif

   if (bob) {
      _blocknum = ( ( x.mrastep() + 1 ) >> x.mmax() );
      open();
      mp.setencode( DCF_DEFAULT_MPACKET, bplen_sizeb(), bplen_n(), _enc );
      findmpacket( mp, char(m), 0 );
      mp.replace(x);
   }

   int n;
   while (m) {
      n = ( ( x.mrastep() + 1 ) & ( ( 1 << x.mmax() ) - 1 ) ) >> m;
      findmpacket( mp, char( 0x80 | m ), n );
      mp.replace(x);
      m--;
   }

   return *this;
};

#endif

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