C++ sequence函数代码示例

/** read /nframes/ from the attached track into /buf/ */
void
Playback_DS::read_block ( sample_t *buf, nframes_t nframes )
{
    THREAD_ASSERT( Playback );

    memset( buf, 0, nframes * sizeof( sample_t ) * channels() );

    /* stupid chicken/egg */
    if ( ! timeline )
        return;

//    printf( "IO: attempting to read block @ %lu\n", _frame );

    if ( ! sequence() )
    {
        /* FIXME: what to do here? */
//        _frame += _nframes;
        return;
    }

    timeline->rdlock();

    /* FIXME: how does this work if _delay is not a multiple of bufsize? */

    if ( _frame >= _delay )
    {
        if ( ! sequence()->play( buf, _frame - _delay, nframes, channels() ) )
            WARNING( "Programming error?" );
    }

    _frame += nframes;

    timeline->unlock();
}

/** read /nframes/ from the attached track into /buf/ */
void
Playback_DS::read_block ( sample_t *buf, nframes_t nframes )
{
    THREAD_ASSERT( Playback );

    memset( buf, 0, nframes * sizeof( sample_t ) * channels() );

//    printf( "IO: attempting to read block @ %lu\n", _frame );

    if ( !timeline )
        return;

    while ( timeline->sequence_lock.tryrdlock() )
    {
        if ( _terminate )
            return;
        
        usleep( 1000 * 10 );
    }
    
    if ( sequence() )
    {
        if ( ! sequence()->play( buf, _frame + _undelay, nframes, channels() ) )
            WARNING( "Programming error?" );
        
        _frame += nframes;
    }
    
    timeline->sequence_lock.unlock();
}

int main()
{
    for (auto i : sequence(-5, +5))
    {
        std::cout << i << " ";
    }
    
    std::cout << std::endl << std::endl;

    for (auto i : sequence(+5, -5, -1))
    {
        std::cout << i << " ";
    }
    
    std::cout << std::endl << std::endl;
    
    std::vector<int> v{1, 2, 3, 4, 5, 6};
    
    for (auto i : sequence(0, v.size()))
    {
        std::cout << "Element " << i  << ": " << v[i] << std::endl;
    }
    
    std::cout << std::endl;
    
    for (auto i : sequence(0, v.size(), 2))
    {
        std::cout << "Element " << i  << ": " << v[i] << std::endl;
    }

}

QNFA* context(const QString& start, const QString& stop, const QString&, int action, QNFA **handler, bool cs)
{
	QNFA *nfa, *end, *beg = sequence(start.constData(), start.length(), &end, cs);
	
	nfa = new QNFA;
	nfa->type = ContextBegin;
	nfa->actionid = action;
	nfa->out.branch = new QNFABranch;
	
	if ( handler )
		*handler = nfa;
	//else
	//	qDebug("no handler set [0x%x]", nfa);
	
	end->out.next = nfa;
	end = nfa;
	
	QNFA *endmark, *begendmark = sequence(stop.constData(), stop.length(), &endmark, cs);
	
	nfa = new QNFA;
	nfa->type = ContextEnd;
	nfa->actionid = action;
	
	endmark->out.next = nfa;
	
	//end->out->branch->append(endmark);
	addNFA(end, begendmark);
	
	return beg;
}

int Line::GetSeg(double y) {
	for(unsigned i = 0; i < size() - 1; i += degree)
		if(sequence(double(at(i).y),y,double(at(i+degree).y)) ||
				sequence(double(at(i+degree).y),y,double(at(i).y)))
			return i;
	return -1;
}

void
Track::sequence ( Audio_Sequence * t )
{
    if ( sequence() == t )
    {
        DMESSAGE( "Attempt to set sequence twice" );
        return;
    }

    t->track( this );

    if ( sequence() )
        add( sequence() );

    _sequence = t;
    /* insert following the annotation pack */
    pack->insert( *t, 1 );

    /* hide the take header */
    t->child(0)->hide();

    t->color( FL_GRAY );
    t->labeltype( FL_NO_LABEL );

    adjust_size();
}

    void NameParser::Item::calc_padding (size_t maxval)
    {
      for (size_t i = 0; i < sequence().size(); i++) {
        assert (sequence() [i] >= 0);
        if (maxval < (size_t) sequence() [i]) maxval = sequence() [i];
      }

      seq_length = 1;
      for (size_t num = 10; maxval >= num; num *= 10)
        seq_length += 1;
    }

void test() {
    try {
        throw;
    } catch (xa& a) {
	sequence( 0, __LINE__ );
    } catch (xb& b) {
	sequence( 1, __LINE__ );
    } catch (...) {
	sequence( 2, __LINE__ );
    }
}

int sequence(int n, int length) {
    length++;
    if (n==1) {
        return length;
    }
    if (n%2==0) {
        return sequence(n/2, length);
    } else {
        return sequence(n*3+1, length);
    }
}

int main( int argc, char* argv [ ] )
{
   // In order to compile this, you need C ++ 11. If it doesn't compile, then
   // you can replace it by a sequence of push_backs.

   sequence seq({   rotation( cube::left ),
                    rotation( cube::left, 1, 3 ),
                    rotation( cube::up ),
                    rotation( cube::left, -1, 3 ),
                    rotation( cube::up, -1, 1 ),
                    rotation( cube::left, -1, 1 ),
                    rotation( cube::up, 1, 1 ),
                    rotation( cube::left, 1, 3 ),
                    rotation( cube::up, -1, 1 ),
                    rotation( cube::left, -1, 3 ) });

   std::cout << seq << "\n";
   std::cout << repeat( seq, 5 ) << "\n";

   sequence corners = repeat( sequence( { { cube::right },
                                          { cube::down, -1 },
                                          { cube::right, -1 },
                                          { cube::down } } ), 2 ) *
                         sequence( { rotation( cube::up ) } ) *
                      repeat( sequence( { { cube::down, -1 },
                                          { cube::right },
                                          { cube::down },
                                          { cube::right, -1 } } ), 2 ) *
                        sequence( { rotation( cube::up, -1 ) } );
   std::cout << corners << "\n";

   cube c(4);

   // Open an SFML window. Switch it on, if you want to use
   // graphics.

   // sf::Window
   //       wind( sf::VideoMode( 1024, 500, 32 ), "Rubik Cube" );

   char q = ' ';
   while( q != 'q' )
   {
      std::cout << c << "\n";
      // plot(c);
      // wind. Display( );
      // Plotting is nicer of course, but you need graphics.

      c. rotate( corners );
      q = getchar( );
   }

   return 0;
}

    void SequenceComponent::render(QPaintDevice * target, const QPoint & targetOffset, const QRect & sourceRect)
    {
        if (sequence())
        {
            QString sequenceStr(sequence()->toString());
            QRect rect(sourceRect.left(), 0, sourceRect.width(), this->height());
            QPainter painter(target);
            painter.translate(targetOffset);
            painter.translate(-rect.topLeft());
            painter.setClipRect(rect);

            // Find cell sizes
            double unitSize = alignmentView()->unitSizeF();
            int firstUnit = alignmentIndexAt(rect.topLeft());
            int lastUnit = alignmentIndexAt(rect.topRight());
            if (lastUnit >= sequenceStr.size()) { lastUnit = sequenceStr.size() - 1; }
            int unitLeft = rectAt(firstUnit).left();

            painter.save();
            if (unitSize < 1)
            {
                painter.setRenderHint(QPainter::SmoothPixmapTransform);
            }
            painter.scale(unitSize, (double) height());
            painter.drawPixmap(0, 0, d->background);
            painter.restore();

            if (unitSize > 8)
            {
                // Set font to be a little smaller than usual
                painter.setPen(Qt::NoPen);

                QFont font = painter.font();
                font.setPixelSize((int) (unitSize * 0.6));
                painter.setFont(font);
                painter.setPen(Qt::NoPen);

                for (int res = firstUnit; res <= lastUnit && res < sequenceStr.size(); ++res)
                {
                    QColor col = Qt::red;
                    painter.drawPixmap(unitLeft, 0, d->pixmapFactory().pixmap(sequenceStr[res], (int) unitSize, col));

                    // Skip to next position
                    unitLeft += unitSize;
                }
            }
        }
    }

Track::~Track ( )
{
    Loggable::block_start();

    /* must destroy sequences first to preserve proper log order */
    takes->clear();
    control->clear();
    annotation->clear();
    delete sequence();

    takes = NULL;
    control = NULL;
    annotation = NULL;

    log_destroy();

    /* ensure that soloing accounting is performed */
    solo( false );

    timeline->remove_track( this );

    /* give up our ports */
    configure_inputs( 0 );
    configure_outputs( 0 );

    _sequence = NULL;

    if ( _name )
        free( _name );

    Loggable::block_end();
}

int
Cursor_Region::handle ( int m )
{
    Logger _log( this );

    if ( m == FL_PUSH )
    {
        if ( test_press( FL_BUTTON3 ) )
        {
            char *s = fl_text_edit( "Cursor text:", "&Save", label() );

            if ( s )
                label( s );

            free( s );

            return 0;
        }
    }

    int r = Sequence_Region::handle( m );

    if ( m == FL_RELEASE )
    {
        sequence()->sort();
        timeline->redraw();
    }

    return r;
}

/*
* Decode a BER encoded DistinguishedName
*/
void X509_DN::decode_from(BER_Decoder& source)
   {
   MemoryVector<byte> bits;

   source.start_cons(SEQUENCE)
      .raw_bytes(bits)
   .end_cons();

   BER_Decoder sequence(bits);

   while(sequence.more_items())
      {
      BER_Decoder rdn = sequence.start_cons(SET);

      while(rdn.more_items())
         {
         OID oid;
         ASN1_String str;

         rdn.start_cons(SEQUENCE)
            .decode(oid)
            .decode(str)
            .verify_end()
        .end_cons();

         add_attribute(oid, str.value());
         }
      }

   dn_bits = bits;
   }

bool
TransportSendBuffer::resend(const SequenceRange& range)
{
  ACE_GUARD_RETURN( TransportSendStrategy::LockType,
                    guard,
                    this->strategy_->lock_,
                    false);

  for (SequenceNumber sequence(range.first);
       sequence <= range.second; ++sequence) {
    // Re-send requested sample if still buffered; missing samples
    // will be scored against the given DisjointSequence:
    BufferMap::iterator it(this->buffers_.find(sequence));
    if (it != this->buffers_.end()) {
      if (OpenDDS::DCPS::Transport_debug_level >= 4) {
        ACE_DEBUG((LM_DEBUG,
                   ACE_TEXT("(%P|%t) TransportSendBuffer::resend() - ")
                   ACE_TEXT("resending PDU: 0x%x, (0x%x,0x%x)\n"),
                   sequence.getValue(),
                   it->second.first,
                   it->second.second));
      }
      resend(it->second);
    }
  }

  // Have we resent all requested data?
  return range.first >= low() && range.second <= high();
}