// The template and inlines for the -*- C++ -*- slice_array class.
-// Copyright (C) 1997-1999, 2000 Free Software Foundation, Inc.
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2009,
+// 2010 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)
+// 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,
// 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.
+// 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.
-// 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.
+// 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/slice_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 _CPP_BITS_SLICE_ARRAY_H
-#define _CPP_BITS_SLICE_ARRAY_H 1
+#ifndef _SLICE_ARRAY_H
+#define _SLICE_ARRAY_H 1
#pragma GCC system_header
-namespace std {
-
- template<typename _Tp>
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @addtogroup numeric_arrays
+ * @{
+ */
+
+ /**
+ * @brief Class defining one-dimensional subset of an array.
+ *
+ * The slice class represents a one-dimensional subset of an array,
+ * specified by three parameters: start offset, size, and stride. The
+ * start offset is the index of the first element of the array that is part
+ * of the subset. The size is the total number of elements in the subset.
+ * Stride is the distance between each successive array element to include
+ * in the subset.
+ *
+ * For example, with an array of size 10, and a slice with offset 1, size 3
+ * and stride 2, the subset consists of array elements 1, 3, and 5.
+ */
+ class slice
+ {
+ public:
+ /// Construct an empty slice.
+ slice();
+
+ /**
+ * @brief Construct a slice.
+ *
+ * @param o Offset in array of first element.
+ * @param d Number of elements in slice.
+ * @param s Stride between array elements.
+ */
+ slice(size_t, size_t, size_t);
+
+ /// Return array offset of first slice element.
+ size_t start() const;
+ /// Return size of slice.
+ size_t size() const;
+ /// Return array stride of slice.
+ size_t stride() const;
+
+ private:
+ size_t _M_off; // offset
+ size_t _M_sz; // size
+ size_t _M_st; // stride unit
+ };
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 543. valarray slice default constructor
+ inline
+ slice::slice()
+ : _M_off(0), _M_sz(0), _M_st(0) {}
+
+ 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; }
+
+ /**
+ * @brief Reference to one-dimensional subset of an array.
+ *
+ * A slice_array is a reference to the actual elements of an array
+ * specified by a slice. The way to get a slice_array is to call
+ * operator[](slice) on a valarray. The returned slice_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 slice_array
+ * refers to.
+ *
+ * @param Tp Element type.
+ */
+ template<typename _Tp>
class slice_array
{
public:
- typedef _Tp value_type;
-
- 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 &);
- // ~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;
-
+ 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.
+ slice_array(const slice_array&);
+
+ /// Assignment operator. Assigns slice elements to corresponding
+ /// elements of @a a.
+ slice_array& operator=(const slice_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;
+ // ~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;
-
- // this constructor is implemented since we need to return a value.
- slice_array (const slice_array&);
-
- // not implemented
- slice_array ();
- slice_array& operator= (const slice_array&);
+ 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(_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(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 () {}
- template<typename _Tp>
+ template<typename _Tp>
+ inline slice_array<_Tp>&
+ slice_array<_Tp>::operator=(const slice_array<_Tp>& __a)
+ {
+ std::__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)
- { __valarray_fill (_M_array, _M_sz, _M_stride, __t); }
-
- template<typename _Tp>
+ slice_array<_Tp>::operator=(const _Tp& __t) const
+ { std::__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>
+ slice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
+ { std::__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); }
+ slice_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
+ { std::__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));\
-} \
+#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(^, xor)
-_DEFINE_VALARRAY_OPERATOR(&, and)
-_DEFINE_VALARRAY_OPERATOR(|, or)
-_DEFINE_VALARRAY_OPERATOR(<<, shift_left)
-_DEFINE_VALARRAY_OPERATOR(>>, shift_right)
+ 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::
+ // @} group numeric_arrays
-#endif /* _CPP_BITS_SLICE_ARRAY_H */
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
-// Local Variables:
-// mode:c++
-// End:
+#endif /* _SLICE_ARRAY_H */
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