5#ifndef GKO_PUBLIC_CORE_BASE_RANGE_ACCESSORS_HPP_
6#define GKO_PUBLIC_CORE_BASE_RANGE_ACCESSORS_HPP_
12#include <ginkgo/core/base/range.hpp>
13#include <ginkgo/core/base/types.hpp>
40template <
typename ValueType,
size_type Dimensionality>
45 static_assert(Dimensionality == 2,
46 "This accessor is only implemented for matrices");
106 const span& cols)
const
108 return GKO_ASSERT(rows.is_valid()), GKO_ASSERT(cols.
is_valid()),
112 rows.end - rows.begin, cols.
end - cols.
begin,
125 return dimension < 2 ?
lengths[dimension] : 1;
140 template <
typename OtherAccessor>
141 GKO_ATTRIBUTES
void copy_from(
const OtherAccessor& other)
const
145 (*this)(i, j) = other(i, j);
158 const std::array<const size_type, dimensionality>
lengths;
A row_major accessor is a bridge between a range and the row-major memory layout.
Definition range_accessors.hpp:41
constexpr range< row_major > operator()(const span &rows, const span &cols) const
Returns the sub-range spanning the range (rows, cols)
Definition range_accessors.hpp:105
constexpr size_type length(size_type dimension) const
Returns the length in dimension dimension.
Definition range_accessors.hpp:123
const std::array< const size_type, dimensionality > lengths
An array of dimension sizes.
Definition range_accessors.hpp:158
const size_type stride
Distance between consecutive rows.
Definition range_accessors.hpp:163
ValueType value_type
Type of values returned by the accessor.
Definition range_accessors.hpp:51
void copy_from(const OtherAccessor &other) const
Copies data from another accessor.
Definition range_accessors.hpp:141
const data_type data
Reference to the underlying data.
Definition range_accessors.hpp:153
static constexpr size_type dimensionality
Number of dimensions of the accessor.
Definition range_accessors.hpp:61
constexpr value_type & operator()(size_type row, size_type col) const
Returns the data element at position (row, col)
Definition range_accessors.hpp:90
value_type * data_type
Type of underlying data storage.
Definition range_accessors.hpp:56
A range is a multidimensional view of the memory.
Definition range.hpp:298
The Ginkgo namespace.
Definition abstract_factory.hpp:20
std::size_t size_type
Integral type used for allocation quantities.
Definition types.hpp:86
A span is a lightweight structure used to create sub-ranges from other ranges.
Definition range.hpp:47
constexpr bool is_valid() const
Checks if a span is valid.
Definition range.hpp:74
const size_type begin
Beginning of the span.
Definition range.hpp:86
const size_type end
End of the span.
Definition range.hpp:91