Nektar::StorageSmvBsr< T >::const_iterator Class Reference

#include <StorageSmvBsr.hpp>

Classes
struct	IterType

Public Member Functions
	const_iterator (MatrixStorage matType, IndexType begin, IndexType end, IndexType blkDim, const DataVectorType &val, const IndexVectorType &indx, const IndexVectorType &pntr)
	const_iterator (const const_iterator &src)
	~const_iterator ()
const_iterator	operator++ (int)
const_iterator &	operator++ ()
const IterType &	operator* ()
const IterType *	operator-> ()
bool	operator== (const const_iterator &rhs)
bool	operator!= (const const_iterator &rhs)

Private Member Functions
void	forward ()
CoordType	storageIndexToFullCoord (IndexType storageIndex)

Private Attributes
MatrixStorage	m_matType
IterType	m_iter
IndexType	m_begin
IndexType	m_end
IndexType	m_blkDim
const DataVectorType &	m_val
const IndexVectorType &	m_indx
const IndexVectorType &	m_pntr

Detailed Description

template<typename T>
class Nektar::StorageSmvBsr< T >::const_iterator

Definition at line 77 of file StorageSmvBsr.hpp.

Constructor & Destructor Documentation

const_iterator() [1/2]

template<typename DataType >

Nektar::StorageSmvBsr< DataType >::const_iterator::const_iterator	(	MatrixStorage	matType,
		IndexType	begin,
		IndexType	end,
		IndexType	blkDim,
		const DataVectorType &	val,
		const IndexVectorType &	indx,
		const IndexVectorType &	pntr
	)

Definition at line 51 of file StorageSmvBsr.cpp.

    : m_matType(matType), m_iter(), m_begin(begin), m_end(end),
      m_blkDim(blkDim), m_val(val), m_indx(indx), m_pntr(pntr)
{
    m_iter.nnzindex = begin;
 
    // Here we rewind the iterator to the 'begin'-th
    // nonzero double value. Consecutive nonzeros are
    // to lie within dense block and when it's done,
    // jump to the next dense block.
    // NB: m_val stores some explicit zeros that need to be skept.
    if (begin < end)
    {
        // determine offset of 'begin'-th nonzero value
 
        m_iter.storageindex = 0;
        m_iter.nnzindex     = 0;
        while (m_iter.nnzindex < begin)
        {
            // explicit zero?
            if (m_val[m_iter.storageindex] > NekConstants::kNekSparseNonZeroTol)
            {
                m_iter.nnzindex++;
            }
            m_iter.storageindex++;
            if (m_iter.storageindex >= m_val.size())
            {
                std::cout << "const_iterator: 'begin' out stored values bounds"
                          << std::endl;
                throw 1;
            }
        }
        m_iter.second = m_val[m_iter.storageindex];
 
        CoordType c         = storageIndexToFullCoord(m_iter.storageindex);
        m_iter.first.first  = c.first;
        m_iter.first.second = c.second;
    }
}

References Nektar::StorageSmvBsr< T >::begin(), Nektar::StorageSmvBsr< T >::end(), Nektar::StorageSmvBsr< T >::const_iterator::IterType::first, Nektar::NekConstants::kNekSparseNonZeroTol, Nektar::StorageSmvBsr< T >::const_iterator::m_iter, Nektar::StorageSmvBsr< T >::const_iterator::m_val, Nektar::StorageSmvBsr< T >::const_iterator::IterType::nnzindex, Nektar::StorageSmvBsr< T >::const_iterator::IterType::second, Nektar::Array< OneD, const DataType >::size(), Nektar::StorageSmvBsr< T >::const_iterator::IterType::storageindex, and Nektar::StorageSmvBsr< T >::const_iterator::storageIndexToFullCoord().

const_iterator() [2/2]

template<typename DataType >

Nektar::StorageSmvBsr< DataType >::const_iterator::const_iterator

(

const const_iterator &

src

)

Definition at line 124 of file StorageSmvBsr.cpp.

    : m_matType(src.m_matType), m_iter(src.m_iter), m_begin(src.m_begin),
      m_end(src.m_end), m_val(src.m_val), m_indx(src.m_indx), m_pntr(src.m_pntr)
{
}

~const_iterator()

template<typename DataType >

Nektar::StorageSmvBsr< DataType >::const_iterator::~const_iterator

Definition at line 132 of file StorageSmvBsr.cpp.

{
}

Member Function Documentation

forward()

template<typename DataType >

void Nektar::StorageSmvBsr< DataType >::const_iterator::forward

private

Definition at line 182 of file StorageSmvBsr.cpp.

{
    while ((m_iter.storageindex + 1 < m_val.size()) &&
           (m_val[++m_iter.storageindex] <= NekConstants::kNekSparseNonZeroTol))
    {
        ;
    }
 
    m_iter.nnzindex++;
 
    if (m_iter.storageindex >= m_val.size())
    {
        m_iter.nnzindex = m_end;
        return;
    }
 
    m_iter.second = m_val[m_iter.storageindex];
 
    CoordType c         = storageIndexToFullCoord(m_iter.storageindex);
    m_iter.first.first  = c.first;
    m_iter.first.second = c.second;
}

References Nektar::NekConstants::kNekSparseNonZeroTol, Nektar::StorageSmvBsr< T >::m_val, and Nektar::Array< OneD, const DataType >::size().

operator!=()

template<typename DataType >

bool Nektar::StorageSmvBsr< DataType >::const_iterator::operator!=

(

const const_iterator &

rhs

)

Definition at line 175 of file StorageSmvBsr.cpp.

{
    return !(m_iter.nnzindex == rhs.m_iter.nnzindex);
}

References Nektar::StorageSmvBsr< T >::const_iterator::m_iter, and Nektar::StorageSmvBsr< T >::const_iterator::IterType::nnzindex.

operator*()

template<typename DataType >

const StorageSmvBsr< DataType >::const_iterator::IterType & Nektar::StorageSmvBsr< DataType >::const_iterator::operator*

Definition at line 155 of file StorageSmvBsr.cpp.

{
    return m_iter;
}

operator++() [1/2]

template<typename DataType >

StorageSmvBsr< DataType >::const_iterator & Nektar::StorageSmvBsr< DataType >::const_iterator::operator++

Definition at line 147 of file StorageSmvBsr.cpp.

{
    forward();
    return *this;
}

operator++() [2/2]

template<typename DataType >

StorageSmvBsr< DataType >::const_iterator Nektar::StorageSmvBsr< DataType >::const_iterator::operator++

(

int

)

Definition at line 138 of file StorageSmvBsr.cpp.

{
    const_iterator out = *this;
    forward();
    return out;
}

operator->()

template<typename DataType >

const StorageSmvBsr< DataType >::const_iterator::IterType * Nektar::StorageSmvBsr< DataType >::const_iterator::operator->

Definition at line 162 of file StorageSmvBsr.cpp.

{
    return &m_iter;
}

operator==()

template<typename DataType >

bool Nektar::StorageSmvBsr< DataType >::const_iterator::operator==

(

const const_iterator &

rhs

)

Definition at line 168 of file StorageSmvBsr.cpp.

{
    return m_iter.nnzindex == rhs.m_iter.nnzindex;
}

References Nektar::StorageSmvBsr< T >::const_iterator::m_iter, and Nektar::StorageSmvBsr< T >::const_iterator::IterType::nnzindex.

storageIndexToFullCoord()

template<typename DataType >

CoordType Nektar::StorageSmvBsr< DataType >::const_iterator::storageIndexToFullCoord ( IndexType  storageIndex )

private

Definition at line 95 of file StorageSmvBsr.cpp.

{
    // find local row and column indices within this block
 
    const IndexType elms       = m_blkDim * m_blkDim;
    const IndexType block      = storageIndex / elms;
    const IndexType loc_offset = storageIndex % elms;
    const IndexType loc_row    = loc_offset % m_blkDim;
    const IndexType loc_col    = loc_offset / m_blkDim;
 
    // find block row and block column
 
    IndexType block_col = m_indx[block];
    IndexType block_row = 0;
    while (block >= m_pntr[block_row + 1])
    {
        block_row++;
    }
 
    // full matrix coordinates of this nonzero entry
 
    CoordType coord;
    coord.first  = block_row * m_blkDim + loc_row;
    coord.second = block_col * m_blkDim + loc_col;
    return coord;
}

References Nektar::StorageSmvBsr< T >::m_blkDim, Nektar::StorageSmvBsr< T >::m_indx, and Nektar::StorageSmvBsr< T >::m_pntr.

Referenced by Nektar::StorageSmvBsr< T >::const_iterator::const_iterator().

Member Data Documentation

m_begin

template<typename T >

IndexType Nektar::StorageSmvBsr< T >::const_iterator::m_begin

private

Definition at line 108 of file StorageSmvBsr.hpp.

m_blkDim

template<typename T >

IndexType Nektar::StorageSmvBsr< T >::const_iterator::m_blkDim

private

Definition at line 110 of file StorageSmvBsr.hpp.

m_end

template<typename T >

IndexType Nektar::StorageSmvBsr< T >::const_iterator::m_end

private

Definition at line 109 of file StorageSmvBsr.hpp.

m_indx

template<typename T >

const IndexVectorType& Nektar::StorageSmvBsr< T >::const_iterator::m_indx

private

Definition at line 112 of file StorageSmvBsr.hpp.

m_iter

template<typename T >

IterType Nektar::StorageSmvBsr< T >::const_iterator::m_iter

private

Definition at line 107 of file StorageSmvBsr.hpp.

Referenced by Nektar::StorageSmvBsr< T >::const_iterator::const_iterator(), Nektar::StorageSmvBsr< T >::const_iterator::operator!=(), and Nektar::StorageSmvBsr< T >::const_iterator::operator==().

m_matType

template<typename T >

MatrixStorage Nektar::StorageSmvBsr< T >::const_iterator::m_matType

private

Definition at line 106 of file StorageSmvBsr.hpp.

m_pntr

template<typename T >

const IndexVectorType& Nektar::StorageSmvBsr< T >::const_iterator::m_pntr

private

Definition at line 113 of file StorageSmvBsr.hpp.

m_val

template<typename T >

const DataVectorType& Nektar::StorageSmvBsr< T >::const_iterator::m_val

private

Definition at line 111 of file StorageSmvBsr.hpp.

Referenced by Nektar::StorageSmvBsr< T >::const_iterator::const_iterator().