CaloCompactCellContainer::compact_input_iterator Class Reference

store the compact cell with index iCell More...

#include <CaloCompactCellContainer.h>

Collaboration diagram for CaloCompactCellContainer::compact_input_iterator:

Public Member Functions
	compact_input_iterator (std::vector< value_type >::const_iterator it)
	Constructor.
CaloCompactCell::value_type	next ()
	Return the current value and advance to the next one.
std::vector< value_type >::const_iterator	base () const
	Return the underlying container iterator.

Private Attributes
std::vector< value_type >::const_iterator	m_it
	The iterator in the underlying container type.
value_type	m_word
	The current word.
int	m_count
	Count; used to tell how many more times we need to shift m_word.

Detailed Description

store the compact cell with index iCell

Parameters

theCompactCell	the compact CaloCell data
iCell	the index in the CaloCompactCellContainer
headerLength	the space reserved for the header information

Simple iterator-like object for reading from the container.

This allows reading one CaloCompactCell::value_type object at a time from the container. There is only one method, next(), which returns the next value (and advances the iterator).

Definition at line 127 of file CaloCompactCellContainer.h.

Constructor & Destructor Documentation

compact_input_iterator()

CaloCompactCellContainer::compact_input_iterator::compact_input_iterator ( std::vector< value_type >::const_iterator it )

inline

Constructor.

Parameters

it	value_type iterator at the start of the data (after the header).

Definition at line 239 of file CaloCompactCellContainer.h.

  : m_it (it),
    m_word(0),
    m_count (0)
{
}

Member Function Documentation

base()

std::vector< CaloCompactCellContainer::value_type >::const_iterator CaloCompactCellContainer::compact_input_iterator::base ( ) const

inline

Return the underlying container iterator.

Definition at line 281 of file CaloCompactCellContainer.h.

{
  return m_it;
}

next()

CaloCompactCell::value_type CaloCompactCellContainer::compact_input_iterator::next ( )

inline

Return the current value and advance to the next one.

Definition at line 250 of file CaloCompactCellContainer.h.

{
  // Constants.
  const int mask = static_cast<CaloCompactCell::value_type>(-1);
  const int shift = 8*sizeof (CaloCompactCell::value_type);
  const int ratio =
    sizeof(value_type) / sizeof(CaloCompactCell::value_type);
 
  // Fetch the next @c value_type, if needed.
  if (m_count % ratio == 0)
    m_word = *m_it;
 
  // Mask off the current value.
  CaloCompactCell::value_type ret = m_word & mask;
 
  // Bump the count.
  if (((++m_count)%ratio) == 0) {
    // We wrapped to a new @c value_type.  Bump the underlying iterator.
    ++m_it;
  }
  else {
    // Same @c value_type --- shift the word over.
    m_word >>= shift;
  }
 
  return ret;
}

Member Data Documentation

m_count

int CaloCompactCellContainer::compact_input_iterator::m_count

private

Count; used to tell how many more times we need to shift m_word.

Definition at line 159 of file CaloCompactCellContainer.h.

m_it

std::vector<value_type>::const_iterator CaloCompactCellContainer::compact_input_iterator::m_it

private

The iterator in the underlying container type.

Definition at line 152 of file CaloCompactCellContainer.h.

m_word

value_type CaloCompactCellContainer::compact_input_iterator::m_word

private

The current word.

This gets shifted to the right as we consume values from it.

Definition at line 156 of file CaloCompactCellContainer.h.

---

The documentation for this class was generated from the following file:

• CaloCompactCellContainer.h