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|
// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup subview
//! @{
//! Class for storing data required to construct or apply operations to a submatrix
//! (ie. where the submatrix starts and ends as well as a reference/pointer to the original matrix),
template<typename eT>
class subview : public Base< eT, subview<eT> >
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
arma_aligned const Mat<eT>& m;
static constexpr bool is_row = false;
static constexpr bool is_col = false;
static constexpr bool is_xvec = false;
const uword aux_row1;
const uword aux_col1;
const uword n_rows;
const uword n_cols;
const uword n_elem;
protected:
arma_inline subview(const Mat<eT>& in_m, const uword in_row1, const uword in_col1, const uword in_n_rows, const uword in_n_cols);
public:
inline ~subview();
inline subview() = delete;
inline subview(const subview& in);
inline subview( subview&& in);
template<typename op_type > inline void inplace_op(const eT val );
template<typename op_type, typename T1> inline void inplace_op(const Base<eT,T1>& x, const char* identifier);
template<typename op_type > inline void inplace_op(const subview<eT>& x, const char* identifier);
// deliberately returning void
inline void operator= (const eT val);
inline void operator+= (const eT val);
inline void operator-= (const eT val);
inline void operator*= (const eT val);
inline void operator/= (const eT val);
inline void operator= (const subview& x);
inline void operator+= (const subview& x);
inline void operator-= (const subview& x);
inline void operator%= (const subview& x);
inline void operator/= (const subview& x);
template<typename T1> inline void operator= (const Base<eT,T1>& x);
template<typename T1> inline void operator+= (const Base<eT,T1>& x);
template<typename T1> inline void operator-= (const Base<eT,T1>& x);
template<typename T1> inline void operator%= (const Base<eT,T1>& x);
template<typename T1> inline void operator/= (const Base<eT,T1>& x);
template<typename T1> inline void operator= (const SpBase<eT,T1>& x);
template<typename T1> inline void operator+= (const SpBase<eT,T1>& x);
template<typename T1> inline void operator-= (const SpBase<eT,T1>& x);
template<typename T1> inline void operator%= (const SpBase<eT,T1>& x);
template<typename T1> inline void operator/= (const SpBase<eT,T1>& x);
template<typename T1, typename gen_type>
inline typename enable_if2< is_same_type<typename T1::elem_type, eT>::value, void>::result operator=(const Gen<T1,gen_type>& x);
inline void operator=(const std::initializer_list<eT>& list);
inline void operator=(const std::initializer_list< std::initializer_list<eT> >& list);
inline static void extract(Mat<eT>& out, const subview& in);
inline static void plus_inplace(Mat<eT>& out, const subview& in);
inline static void minus_inplace(Mat<eT>& out, const subview& in);
inline static void schur_inplace(Mat<eT>& out, const subview& in);
inline static void div_inplace(Mat<eT>& out, const subview& in);
template<typename functor> inline void for_each(functor F);
template<typename functor> inline void for_each(functor F) const;
template<typename functor> inline void transform(functor F);
template<typename functor> inline void imbue(functor F);
inline void replace(const eT old_val, const eT new_val);
inline void clean(const pod_type threshold);
inline void clamp(const eT min_val, const eT max_val);
inline void fill(const eT val);
inline void zeros();
inline void ones();
inline void eye();
inline void randu();
inline void randn();
arma_warn_unused inline eT at_alt (const uword ii) const;
arma_warn_unused inline eT& operator[](const uword ii);
arma_warn_unused inline eT operator[](const uword ii) const;
arma_warn_unused inline eT& operator()(const uword ii);
arma_warn_unused inline eT operator()(const uword ii) const;
arma_warn_unused inline eT& operator()(const uword in_row, const uword in_col);
arma_warn_unused inline eT operator()(const uword in_row, const uword in_col) const;
arma_warn_unused inline eT& at(const uword in_row, const uword in_col);
arma_warn_unused inline eT at(const uword in_row, const uword in_col) const;
arma_warn_unused inline eT& front();
arma_warn_unused inline eT front() const;
arma_warn_unused inline eT& back();
arma_warn_unused inline eT back() const;
arma_inline eT* colptr(const uword in_col);
arma_inline const eT* colptr(const uword in_col) const;
template<typename eT2>
inline bool check_overlap(const subview<eT2>& x) const;
arma_warn_unused inline bool is_vec() const;
arma_warn_unused inline bool is_finite() const;
arma_warn_unused inline bool is_zero(const pod_type tol = 0) const;
arma_warn_unused inline bool has_inf() const;
arma_warn_unused inline bool has_nan() const;
arma_warn_unused inline bool has_nonfinite() const;
inline subview_row<eT> row(const uword row_num);
inline const subview_row<eT> row(const uword row_num) const;
inline subview_row<eT> operator()(const uword row_num, const span& col_span);
inline const subview_row<eT> operator()(const uword row_num, const span& col_span) const;
inline subview_col<eT> col(const uword col_num);
inline const subview_col<eT> col(const uword col_num) const;
inline subview_col<eT> operator()(const span& row_span, const uword col_num);
inline const subview_col<eT> operator()(const span& row_span, const uword col_num) const;
inline Col<eT> unsafe_col(const uword col_num);
inline const Col<eT> unsafe_col(const uword col_num) const;
inline subview<eT> rows(const uword in_row1, const uword in_row2);
inline const subview<eT> rows(const uword in_row1, const uword in_row2) const;
inline subview<eT> cols(const uword in_col1, const uword in_col2);
inline const subview<eT> cols(const uword in_col1, const uword in_col2) const;
inline subview<eT> submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2);
inline const subview<eT> submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2) const;
inline subview<eT> submat (const span& row_span, const span& col_span);
inline const subview<eT> submat (const span& row_span, const span& col_span) const;
inline subview<eT> operator()(const span& row_span, const span& col_span);
inline const subview<eT> operator()(const span& row_span, const span& col_span) const;
inline subview_each1< subview<eT>, 0 > each_col();
inline subview_each1< subview<eT>, 1 > each_row();
template<typename T1> inline subview_each2< subview<eT>, 0, T1 > each_col(const Base<uword, T1>& indices);
template<typename T1> inline subview_each2< subview<eT>, 1, T1 > each_row(const Base<uword, T1>& indices);
inline void each_col(const std::function< void( Col<eT>&) >& F);
inline void each_col(const std::function< void(const Col<eT>&) >& F) const;
inline void each_row(const std::function< void( Row<eT>&) >& F);
inline void each_row(const std::function< void(const Row<eT>&) >& F) const;
inline diagview<eT> diag(const sword in_id = 0);
inline const diagview<eT> diag(const sword in_id = 0) const;
inline void swap_rows(const uword in_row1, const uword in_row2);
inline void swap_cols(const uword in_col1, const uword in_col2);
class const_iterator;
class iterator
{
public:
inline iterator();
inline iterator(const iterator& X);
inline iterator(subview<eT>& in_sv, const uword in_row, const uword in_col);
arma_warn_unused inline eT& operator*();
inline iterator& operator++();
arma_warn_unused inline iterator operator++(int);
arma_warn_unused inline bool operator==(const iterator& rhs) const;
arma_warn_unused inline bool operator!=(const iterator& rhs) const;
arma_warn_unused inline bool operator==(const const_iterator& rhs) const;
arma_warn_unused inline bool operator!=(const const_iterator& rhs) const;
typedef std::forward_iterator_tag iterator_category;
typedef eT value_type;
typedef std::ptrdiff_t difference_type; // TODO: not certain on this one
typedef eT* pointer;
typedef eT& reference;
arma_aligned Mat<eT>* M;
arma_aligned eT* current_ptr;
arma_aligned uword current_row;
arma_aligned uword current_col;
arma_aligned const uword aux_row1;
arma_aligned const uword aux_row2_p1;
};
class const_iterator
{
public:
inline const_iterator();
inline const_iterator(const iterator& X);
inline const_iterator(const const_iterator& X);
inline const_iterator(const subview<eT>& in_sv, const uword in_row, const uword in_col);
arma_warn_unused inline const eT& operator*();
inline const_iterator& operator++();
arma_warn_unused inline const_iterator operator++(int);
arma_warn_unused inline bool operator==(const iterator& rhs) const;
arma_warn_unused inline bool operator!=(const iterator& rhs) const;
arma_warn_unused inline bool operator==(const const_iterator& rhs) const;
arma_warn_unused inline bool operator!=(const const_iterator& rhs) const;
// So that we satisfy the STL iterator types.
typedef std::forward_iterator_tag iterator_category;
typedef eT value_type;
typedef std::ptrdiff_t difference_type; // TODO: not certain on this one
typedef const eT* pointer;
typedef const eT& reference;
arma_aligned const Mat<eT>* M;
arma_aligned const eT* current_ptr;
arma_aligned uword current_row;
arma_aligned uword current_col;
arma_aligned const uword aux_row1;
arma_aligned const uword aux_row2_p1;
};
class const_row_iterator;
class row_iterator
{
public:
inline row_iterator();
inline row_iterator(const row_iterator& X);
inline row_iterator(subview<eT>& in_sv, const uword in_row, const uword in_col);
arma_warn_unused inline eT& operator* ();
inline row_iterator& operator++();
arma_warn_unused inline row_iterator operator++(int);
arma_warn_unused inline bool operator!=(const row_iterator& X) const;
arma_warn_unused inline bool operator==(const row_iterator& X) const;
arma_warn_unused inline bool operator!=(const const_row_iterator& X) const;
arma_warn_unused inline bool operator==(const const_row_iterator& X) const;
typedef std::forward_iterator_tag iterator_category;
typedef eT value_type;
typedef std::ptrdiff_t difference_type; // TODO: not certain on this one
typedef eT* pointer;
typedef eT& reference;
arma_aligned Mat<eT>* M;
arma_aligned uword current_row;
arma_aligned uword current_col;
arma_aligned const uword aux_col1;
arma_aligned const uword aux_col2_p1;
};
class const_row_iterator
{
public:
inline const_row_iterator();
inline const_row_iterator(const row_iterator& X);
inline const_row_iterator(const const_row_iterator& X);
inline const_row_iterator(const subview<eT>& in_sv, const uword in_row, const uword in_col);
arma_warn_unused inline const eT& operator*() const;
inline const_row_iterator& operator++();
arma_warn_unused inline const_row_iterator operator++(int);
arma_warn_unused inline bool operator!=(const row_iterator& X) const;
arma_warn_unused inline bool operator==(const row_iterator& X) const;
arma_warn_unused inline bool operator!=(const const_row_iterator& X) const;
arma_warn_unused inline bool operator==(const const_row_iterator& X) const;
typedef std::forward_iterator_tag iterator_category;
typedef eT value_type;
typedef std::ptrdiff_t difference_type; // TODO: not certain on this one
typedef const eT* pointer;
typedef const eT& reference;
arma_aligned const Mat<eT>* M;
arma_aligned uword current_row;
arma_aligned uword current_col;
arma_aligned const uword aux_col1;
arma_aligned const uword aux_col2_p1;
};
inline iterator begin();
inline const_iterator begin() const;
inline const_iterator cbegin() const;
inline iterator end();
inline const_iterator end() const;
inline const_iterator cend() const;
friend class Mat<eT>;
};
template<typename eT>
class subview_col : public subview<eT>
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
static constexpr bool is_row = false;
static constexpr bool is_col = true;
static constexpr bool is_xvec = false;
const eT* colmem;
inline void operator= (const subview<eT>& x);
inline void operator= (const subview_col& x);
inline void operator= (const eT val);
inline void operator= (const std::initializer_list<eT>& list);
template<typename T1> inline void operator= (const Base<eT,T1>& x);
template<typename T1> inline void operator= (const SpBase<eT,T1>& x);
template<typename T1, typename gen_type>
inline typename enable_if2< is_same_type<typename T1::elem_type, eT>::value, void>::result operator=(const Gen<T1,gen_type>& x);
arma_warn_unused arma_inline const Op<subview_col<eT>,op_htrans> t() const;
arma_warn_unused arma_inline const Op<subview_col<eT>,op_htrans> ht() const;
arma_warn_unused arma_inline const Op<subview_col<eT>,op_strans> st() const;
arma_warn_unused arma_inline const Op<subview_col<eT>,op_strans> as_row() const;
inline void fill(const eT val);
inline void zeros();
inline void ones();
arma_inline eT at_alt (const uword i) const;
arma_inline eT& operator[](const uword i);
arma_inline eT operator[](const uword i) const;
inline eT& operator()(const uword i);
inline eT operator()(const uword i) const;
inline eT& operator()(const uword in_row, const uword in_col);
inline eT operator()(const uword in_row, const uword in_col) const;
inline eT& at(const uword in_row, const uword in_col);
inline eT at(const uword in_row, const uword in_col) const;
arma_inline eT* colptr(const uword in_col);
arma_inline const eT* colptr(const uword in_col) const;
inline subview_col<eT> rows(const uword in_row1, const uword in_row2);
inline const subview_col<eT> rows(const uword in_row1, const uword in_row2) const;
inline subview_col<eT> subvec(const uword in_row1, const uword in_row2);
inline const subview_col<eT> subvec(const uword in_row1, const uword in_row2) const;
inline subview_col<eT> subvec(const uword start_row, const SizeMat& s);
inline const subview_col<eT> subvec(const uword start_row, const SizeMat& s) const;
inline subview_col<eT> head(const uword N);
inline const subview_col<eT> head(const uword N) const;
inline subview_col<eT> tail(const uword N);
inline const subview_col<eT> tail(const uword N) const;
arma_warn_unused inline eT min() const;
arma_warn_unused inline eT max() const;
inline eT min(uword& index_of_min_val) const;
inline eT max(uword& index_of_max_val) const;
arma_warn_unused inline uword index_min() const;
arma_warn_unused inline uword index_max() const;
inline subview_col(const subview_col& in);
inline subview_col( subview_col&& in);
protected:
inline subview_col(const Mat<eT>& in_m, const uword in_col);
inline subview_col(const Mat<eT>& in_m, const uword in_col, const uword in_row1, const uword in_n_rows);
inline subview_col() = delete;
friend class Mat<eT>;
friend class Col<eT>;
friend class subview<eT>;
};
template<typename eT>
class subview_cols : public subview<eT>
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
static constexpr bool is_row = false;
static constexpr bool is_col = false;
static constexpr bool is_xvec = false;
inline subview_cols(const subview_cols& in);
inline subview_cols( subview_cols&& in);
inline void operator= (const subview<eT>& x);
inline void operator= (const subview_cols& x);
inline void operator= (const eT val);
inline void operator= (const std::initializer_list<eT>& list);
inline void operator= (const std::initializer_list< std::initializer_list<eT> >& list);
template<typename T1> inline void operator= (const Base<eT,T1>& x);
template<typename T1> inline void operator= (const SpBase<eT,T1>& x);
template<typename T1, typename gen_type>
inline typename enable_if2< is_same_type<typename T1::elem_type, eT>::value, void>::result operator=(const Gen<T1,gen_type>& x);
arma_warn_unused arma_inline const Op<subview_cols<eT>,op_htrans> t() const;
arma_warn_unused arma_inline const Op<subview_cols<eT>,op_htrans> ht() const;
arma_warn_unused arma_inline const Op<subview_cols<eT>,op_strans> st() const;
arma_warn_unused arma_inline const Op<subview_cols<eT>,op_vectorise_col> as_col() const;
arma_warn_unused inline eT at_alt (const uword ii) const;
arma_warn_unused inline eT& operator[](const uword ii);
arma_warn_unused inline eT operator[](const uword ii) const;
arma_warn_unused inline eT& operator()(const uword ii);
arma_warn_unused inline eT operator()(const uword ii) const;
arma_warn_unused inline eT& operator()(const uword in_row, const uword in_col);
arma_warn_unused inline eT operator()(const uword in_row, const uword in_col) const;
arma_warn_unused inline eT& at(const uword in_row, const uword in_col);
arma_warn_unused inline eT at(const uword in_row, const uword in_col) const;
arma_inline eT* colptr(const uword in_col);
arma_inline const eT* colptr(const uword in_col) const;
protected:
inline subview_cols(const Mat<eT>& in_m, const uword in_col1, const uword in_n_cols);
inline subview_cols() = delete;
friend class Mat<eT>;
friend class subview<eT>;
};
template<typename eT>
class subview_row : public subview<eT>
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
static constexpr bool is_row = true;
static constexpr bool is_col = false;
static constexpr bool is_xvec = false;
inline void operator= (const subview<eT>& x);
inline void operator= (const subview_row& x);
inline void operator= (const eT val);
inline void operator= (const std::initializer_list<eT>& list);
template<typename T1> inline void operator= (const Base<eT,T1>& x);
template<typename T1> inline void operator= (const SpBase<eT,T1>& x);
template<typename T1, typename gen_type>
inline typename enable_if2< is_same_type<typename T1::elem_type, eT>::value, void>::result operator=(const Gen<T1,gen_type>& x);
arma_warn_unused arma_inline const Op<subview_row<eT>,op_htrans> t() const;
arma_warn_unused arma_inline const Op<subview_row<eT>,op_htrans> ht() const;
arma_warn_unused arma_inline const Op<subview_row<eT>,op_strans> st() const;
arma_warn_unused arma_inline const Op<subview_row<eT>,op_strans> as_col() const;
inline eT at_alt (const uword i) const;
inline eT& operator[](const uword i);
inline eT operator[](const uword i) const;
inline eT& operator()(const uword i);
inline eT operator()(const uword i) const;
inline eT& operator()(const uword in_row, const uword in_col);
inline eT operator()(const uword in_row, const uword in_col) const;
inline eT& at(const uword in_row, const uword in_col);
inline eT at(const uword in_row, const uword in_col) const;
inline subview_row<eT> cols(const uword in_col1, const uword in_col2);
inline const subview_row<eT> cols(const uword in_col1, const uword in_col2) const;
inline subview_row<eT> subvec(const uword in_col1, const uword in_col2);
inline const subview_row<eT> subvec(const uword in_col1, const uword in_col2) const;
inline subview_row<eT> subvec(const uword start_col, const SizeMat& s);
inline const subview_row<eT> subvec(const uword start_col, const SizeMat& s) const;
inline subview_row<eT> head(const uword N);
inline const subview_row<eT> head(const uword N) const;
inline subview_row<eT> tail(const uword N);
inline const subview_row<eT> tail(const uword N) const;
arma_warn_unused inline uword index_min() const;
arma_warn_unused inline uword index_max() const;
inline typename subview<eT>::row_iterator begin();
inline typename subview<eT>::const_row_iterator begin() const;
inline typename subview<eT>::const_row_iterator cbegin() const;
inline typename subview<eT>::row_iterator end();
inline typename subview<eT>::const_row_iterator end() const;
inline typename subview<eT>::const_row_iterator cend() const;
inline subview_row(const subview_row& in);
inline subview_row( subview_row&& in);
protected:
inline subview_row(const Mat<eT>& in_m, const uword in_row);
inline subview_row(const Mat<eT>& in_m, const uword in_row, const uword in_col1, const uword in_n_cols);
inline subview_row() = delete;
friend class Mat<eT>;
friend class Row<eT>;
friend class subview<eT>;
};
template<typename eT>
class subview_row_strans : public Base< eT, subview_row_strans<eT> >
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
static constexpr bool is_row = false;
static constexpr bool is_col = true;
static constexpr bool is_xvec = false;
arma_aligned const subview_row<eT>& sv_row;
const uword n_rows; // equal to n_elem
const uword n_elem;
static constexpr uword n_cols = 1;
inline explicit subview_row_strans(const subview_row<eT>& in_sv_row);
inline void extract(Mat<eT>& out) const;
inline eT at_alt (const uword i) const;
inline eT operator[](const uword i) const;
inline eT operator()(const uword i) const;
inline eT operator()(const uword in_row, const uword in_col) const;
inline eT at(const uword in_row, const uword in_col) const;
};
template<typename eT>
class subview_row_htrans : public Base< eT, subview_row_htrans<eT> >
{
public:
typedef eT elem_type;
typedef typename get_pod_type<elem_type>::result pod_type;
static constexpr bool is_row = false;
static constexpr bool is_col = true;
static constexpr bool is_xvec = false;
arma_aligned const subview_row<eT>& sv_row;
const uword n_rows; // equal to n_elem
const uword n_elem;
static constexpr uword n_cols = 1;
inline explicit subview_row_htrans(const subview_row<eT>& in_sv_row);
inline void extract(Mat<eT>& out) const;
inline eT at_alt (const uword i) const;
inline eT operator[](const uword i) const;
inline eT operator()(const uword i) const;
inline eT operator()(const uword in_row, const uword in_col) const;
inline eT at(const uword in_row, const uword in_col) const;
};
//! @}
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