224 lines
7.7 KiB
C++
224 lines
7.7 KiB
C++
// The template and inlines for the -*- C++ -*- gslice_array class.
|
|
|
|
// Copyright (C) 1997-2020 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @file bits/gslice_array.h
|
|
* This is an internal header file, included by other library headers.
|
|
* Do not attempt to use it directly. @headername{valarray}
|
|
*/
|
|
|
|
// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
|
|
|
|
#ifndef _GSLICE_ARRAY_H
|
|
#define _GSLICE_ARRAY_H 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
/**
|
|
* @addtogroup numeric_arrays
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Reference to multi-dimensional subset of an array.
|
|
*
|
|
* A gslice_array is a reference to the actual elements of an array
|
|
* specified by a gslice. The way to get a gslice_array is to call
|
|
* operator[](gslice) on a valarray. The returned gslice_array then
|
|
* permits carrying operations out on the referenced subset of elements in
|
|
* the original valarray. For example, operator+=(valarray) will add
|
|
* values to the subset of elements in the underlying valarray this
|
|
* gslice_array refers to.
|
|
*
|
|
* @param Tp Element type.
|
|
*/
|
|
template<typename _Tp>
|
|
class gslice_array
|
|
{
|
|
public:
|
|
typedef _Tp value_type;
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 253. valarray helper functions are almost entirely useless
|
|
|
|
/// Copy constructor. Both slices refer to the same underlying array.
|
|
gslice_array(const gslice_array&);
|
|
|
|
/// Assignment operator. Assigns slice elements to corresponding
|
|
/// elements of @a a.
|
|
gslice_array& operator=(const gslice_array&);
|
|
|
|
/// Assign slice elements to corresponding elements of @a v.
|
|
void operator=(const valarray<_Tp>&) const;
|
|
/// Multiply slice elements by corresponding elements of @a v.
|
|
void operator*=(const valarray<_Tp>&) const;
|
|
/// Divide slice elements by corresponding elements of @a v.
|
|
void operator/=(const valarray<_Tp>&) const;
|
|
/// Modulo slice elements by corresponding elements of @a v.
|
|
void operator%=(const valarray<_Tp>&) const;
|
|
/// Add corresponding elements of @a v to slice elements.
|
|
void operator+=(const valarray<_Tp>&) const;
|
|
/// Subtract corresponding elements of @a v from slice elements.
|
|
void operator-=(const valarray<_Tp>&) const;
|
|
/// Logical xor slice elements with corresponding elements of @a v.
|
|
void operator^=(const valarray<_Tp>&) const;
|
|
/// Logical and slice elements with corresponding elements of @a v.
|
|
void operator&=(const valarray<_Tp>&) const;
|
|
/// Logical or slice elements with corresponding elements of @a v.
|
|
void operator|=(const valarray<_Tp>&) const;
|
|
/// Left shift slice elements by corresponding elements of @a v.
|
|
void operator<<=(const valarray<_Tp>&) const;
|
|
/// Right shift slice elements by corresponding elements of @a v.
|
|
void operator>>=(const valarray<_Tp>&) const;
|
|
/// Assign all slice elements to @a t.
|
|
void operator=(const _Tp&) const;
|
|
|
|
template<class _Dom>
|
|
void operator=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator*=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator/=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator%=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator+=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator-=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator^=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator&=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator|=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator<<=(const _Expr<_Dom, _Tp>&) const;
|
|
template<class _Dom>
|
|
void operator>>=(const _Expr<_Dom, _Tp>&) const;
|
|
|
|
private:
|
|
_Array<_Tp> _M_array;
|
|
const valarray<size_t>& _M_index;
|
|
|
|
friend class valarray<_Tp>;
|
|
|
|
gslice_array(_Array<_Tp>, const valarray<size_t>&);
|
|
|
|
#if __cplusplus < 201103L
|
|
// not implemented
|
|
gslice_array();
|
|
#else
|
|
public:
|
|
gslice_array() = delete;
|
|
#endif
|
|
};
|
|
|
|
template<typename _Tp>
|
|
inline
|
|
gslice_array<_Tp>::gslice_array(_Array<_Tp> __a,
|
|
const valarray<size_t>& __i)
|
|
: _M_array(__a), _M_index(__i) {}
|
|
|
|
template<typename _Tp>
|
|
inline
|
|
gslice_array<_Tp>::gslice_array(const gslice_array<_Tp>& __a)
|
|
: _M_array(__a._M_array), _M_index(__a._M_index) {}
|
|
|
|
template<typename _Tp>
|
|
inline gslice_array<_Tp>&
|
|
gslice_array<_Tp>::operator=(const gslice_array<_Tp>& __a)
|
|
{
|
|
std::__valarray_copy(_Array<_Tp>(__a._M_array),
|
|
_Array<size_t>(__a._M_index), _M_index.size(),
|
|
_M_array, _Array<size_t>(_M_index));
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Tp>
|
|
inline void
|
|
gslice_array<_Tp>::operator=(const _Tp& __t) const
|
|
{
|
|
std::__valarray_fill(_M_array, _Array<size_t>(_M_index),
|
|
_M_index.size(), __t);
|
|
}
|
|
|
|
template<typename _Tp>
|
|
inline void
|
|
gslice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
|
|
{
|
|
std::__valarray_copy(_Array<_Tp>(__v), __v.size(),
|
|
_M_array, _Array<size_t>(_M_index));
|
|
}
|
|
|
|
template<typename _Tp>
|
|
template<class _Dom>
|
|
inline void
|
|
gslice_array<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e) const
|
|
{
|
|
std::__valarray_copy (__e, _M_index.size(), _M_array,
|
|
_Array<size_t>(_M_index));
|
|
}
|
|
|
|
#undef _DEFINE_VALARRAY_OPERATOR
|
|
#define _DEFINE_VALARRAY_OPERATOR(_Op, _Name) \
|
|
template<typename _Tp> \
|
|
inline void \
|
|
gslice_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const \
|
|
{ \
|
|
_Array_augmented_##_Name(_M_array, _Array<size_t>(_M_index), \
|
|
_Array<_Tp>(__v), __v.size()); \
|
|
} \
|
|
\
|
|
template<typename _Tp> \
|
|
template<class _Dom> \
|
|
inline void \
|
|
gslice_array<_Tp>::operator _Op##= (const _Expr<_Dom, _Tp>& __e) const\
|
|
{ \
|
|
_Array_augmented_##_Name(_M_array, _Array<size_t>(_M_index), __e,\
|
|
_M_index.size()); \
|
|
}
|
|
|
|
_DEFINE_VALARRAY_OPERATOR(*, __multiplies)
|
|
_DEFINE_VALARRAY_OPERATOR(/, __divides)
|
|
_DEFINE_VALARRAY_OPERATOR(%, __modulus)
|
|
_DEFINE_VALARRAY_OPERATOR(+, __plus)
|
|
_DEFINE_VALARRAY_OPERATOR(-, __minus)
|
|
_DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
|
|
_DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
|
|
_DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
|
|
_DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
|
|
_DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
|
|
|
|
#undef _DEFINE_VALARRAY_OPERATOR
|
|
|
|
// @} group numeric_arrays
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
|
|
#endif /* _GSLICE_ARRAY_H */
|