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