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219 lines
6.9 KiB
C++
219 lines
6.9 KiB
C++
// The template and inlines for the -*- C++ -*- slice_array class.
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// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
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/** @file slice_array.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _CPP_BITS_SLICE_ARRAY_H
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#define _CPP_BITS_SLICE_ARRAY_H 1
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#pragma GCC system_header
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namespace std
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{
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class slice
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{
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public:
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slice();
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slice(size_t, size_t, size_t);
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size_t start() const;
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size_t size() const;
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size_t stride() const;
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private:
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size_t _M_off; // offset
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size_t _M_sz; // size
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size_t _M_st; // stride unit
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};
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// The default constructor constructor is not required to initialize
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// data members with any meaningful values, so we choose to do nothing.
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inline
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slice::slice() {}
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inline
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slice::slice(size_t __o, size_t __d, size_t __s)
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: _M_off(__o), _M_sz(__d), _M_st(__s) {}
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inline size_t
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slice::start() const
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{ return _M_off; }
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inline size_t
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slice::size() const
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{ return _M_sz; }
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inline size_t
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slice::stride() const
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{ return _M_st; }
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template<typename _Tp>
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class slice_array
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{
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public:
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typedef _Tp value_type;
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// This constructor is implemented since we need to return a value.
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slice_array(const slice_array&);
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// This operator must be public. See DR-253.
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slice_array& operator=(const slice_array&);
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void operator=(const valarray<_Tp>&) const;
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void operator*=(const valarray<_Tp>&) const;
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void operator/=(const valarray<_Tp>&) const;
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void operator%=(const valarray<_Tp>&) const;
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void operator+=(const valarray<_Tp>&) const;
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void operator-=(const valarray<_Tp>&) const;
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void operator^=(const valarray<_Tp>&) const;
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void operator&=(const valarray<_Tp>&) const;
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void operator|=(const valarray<_Tp>&) const;
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void operator<<=(const valarray<_Tp>&) const;
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void operator>>=(const valarray<_Tp>&) const;
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void operator=(const _Tp &) const;
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// ~slice_array ();
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template<class _Dom>
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void operator=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator*=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator/=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator%=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator+=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator-=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator^=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator&=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator|=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator<<=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator>>=(const _Expr<_Dom,_Tp>&) const;
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private:
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friend class valarray<_Tp>;
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slice_array(_Array<_Tp>, const slice&);
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const size_t _M_sz;
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const size_t _M_stride;
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const _Array<_Tp> _M_array;
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// not implemented
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slice_array();
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};
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template<typename _Tp>
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inline
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slice_array<_Tp>::slice_array(_Array<_Tp> __a, const slice& __s)
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: _M_sz(__s.size()), _M_stride(__s.stride()),
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_M_array(__a.begin() + __s.start()) {}
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template<typename _Tp>
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inline
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slice_array<_Tp>::slice_array(const slice_array<_Tp>& a)
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: _M_sz(a._M_sz), _M_stride(a._M_stride), _M_array(a._M_array) {}
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// template<typename _Tp>
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// inline slice_array<_Tp>::~slice_array () {}
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template<typename _Tp>
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inline slice_array<_Tp>&
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slice_array<_Tp>::operator=(const slice_array<_Tp>& __a)
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{
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__valarray_copy(__a._M_array, __a._M_sz, __a._M_stride,
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_M_array, _M_stride);
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return *this;
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}
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template<typename _Tp>
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inline void
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slice_array<_Tp>::operator=(const _Tp& __t) const
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{ __valarray_fill(_M_array, _M_sz, _M_stride, __t); }
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template<typename _Tp>
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inline void
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slice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
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{ __valarray_copy(_Array<_Tp>(__v), _M_array, _M_sz, _M_stride); }
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template<typename _Tp>
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template<class _Dom>
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inline void
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slice_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
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{ __valarray_copy(__e, _M_sz, _M_array, _M_stride); }
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#undef _DEFINE_VALARRAY_OPERATOR
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#define _DEFINE_VALARRAY_OPERATOR(_Op,_Name) \
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template<typename _Tp> \
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inline void \
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slice_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const \
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{ \
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_Array_augmented_##_Name(_M_array, _M_sz, _M_stride, _Array<_Tp>(__v));\
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} \
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\
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template<typename _Tp> \
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template<class _Dom> \
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inline void \
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slice_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\
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{ \
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_Array_augmented_##_Name(_M_array, _M_stride, __e, _M_sz); \
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}
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_DEFINE_VALARRAY_OPERATOR(*, __multiplies)
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_DEFINE_VALARRAY_OPERATOR(/, __divides)
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_DEFINE_VALARRAY_OPERATOR(%, __modulus)
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_DEFINE_VALARRAY_OPERATOR(+, __plus)
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_DEFINE_VALARRAY_OPERATOR(-, __minus)
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_DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
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_DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
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_DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
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_DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
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_DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
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#undef _DEFINE_VALARRAY_OPERATOR
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} // std::
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#endif /* _CPP_BITS_SLICE_ARRAY_H */
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// Local Variables:
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// mode:c++
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// End:
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