diff options
Diffstat (limited to 'contrib/libstdc++/include/bits/gslice.h')
| -rw-r--r-- | contrib/libstdc++/include/bits/gslice.h | 191 |
1 files changed, 98 insertions, 93 deletions
diff --git a/contrib/libstdc++/include/bits/gslice.h b/contrib/libstdc++/include/bits/gslice.h index 78f8a67..12bfc32 100644 --- a/contrib/libstdc++/include/bits/gslice.h +++ b/contrib/libstdc++/include/bits/gslice.h @@ -1,6 +1,6 @@ // The template and inlines for the -*- C++ -*- gslice class. -// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004 +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004, 2005 // Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free @@ -16,7 +16,7 @@ // 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, +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, // USA. // As a special exception, you may use this file as part of a free software @@ -28,19 +28,19 @@ // 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 gslice.h * This is an internal header file, included by other library headers. * You should not attempt to use it directly. */ +// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr> + #ifndef _GSLICE_H #define _GSLICE_H 1 #pragma GCC system_header -namespace std { +_GLIBCXX_BEGIN_NAMESPACE(std) /** * @brief Class defining multi-dimensional subset of an array. @@ -60,106 +60,111 @@ namespace std { * slice[0,2]==array[9], slice[1,0]==array[14], slice[1,1]==array[17], * slice[1,2]==array[20]. */ - class gslice + class gslice + { + public: + /// Construct an empty slice. + gslice (); + + /** + * @brief Construct a slice. + * + * Constructs a slice with as many dimensions as the length of the @a l + * and @a s arrays. + * + * @param o Offset in array of first element. + * @param l Array of dimension lengths. + * @param s Array of dimension strides between array elements. + */ + gslice(size_t, const valarray<size_t>&, const valarray<size_t>&); + + // XXX: the IS says the copy-ctor and copy-assignment operators are + // synthetized by the compiler but they are just unsuitable + // for a ref-counted semantic + /// Copy constructor. + gslice(const gslice&); + + /// Destructor. + ~gslice(); + + // XXX: See the note above. + /// Assignment operator. + gslice& operator=(const gslice&); + + /// Return array offset of first slice element. + size_t start() const; + + /// Return array of sizes of slice dimensions. + valarray<size_t> size() const; + + /// Return array of array strides for each dimension. + valarray<size_t> stride() const; + + private: + struct _Indexer { - public: - /// Construct an empty slice. - gslice (); - - /** - * @brief Construct a slice. - * - * Constructs a slice with as many dimensions as the length of the @a l - * and @a s arrays. - * - * @param o Offset in array of first element. - * @param l Array of dimension lengths. - * @param s Array of dimension strides between array elements. - */ - gslice(size_t, const valarray<size_t>&, const valarray<size_t>&); - - // XXX: the IS says the copy-ctor and copy-assignment operators are - // synthetized by the compiler but they are just unsuitable - // for a ref-counted semantic - /// Copy constructor. - gslice(const gslice&); - - /// Destructor. - ~gslice(); - - // XXX: See the note above. - /// Assignment operator. - gslice& operator=(const gslice&); - - /// Return array offset of first slice element. - size_t start() const; - - /// Return array of sizes of slice dimensions. - valarray<size_t> size() const; - - /// Return array of array strides for each dimension. - valarray<size_t> stride() const; - - private: - struct _Indexer { - size_t _M_count; - size_t _M_start; - valarray<size_t> _M_size; - valarray<size_t> _M_stride; - valarray<size_t> _M_index; // Linear array of referenced indices - _Indexer(size_t, const valarray<size_t>&, - const valarray<size_t>&); - void _M_increment_use() { ++_M_count; } - size_t _M_decrement_use() { return --_M_count; } - }; - - _Indexer* _M_index; - - template<typename _Tp> friend class valarray; + size_t _M_count; + size_t _M_start; + valarray<size_t> _M_size; + valarray<size_t> _M_stride; + valarray<size_t> _M_index; // Linear array of referenced indices + _Indexer(size_t, const valarray<size_t>&, + const valarray<size_t>&); + void + _M_increment_use() + { ++_M_count; } + + size_t + _M_decrement_use() + { return --_M_count; } }; - inline size_t - gslice::start () const - { return _M_index ? _M_index->_M_start : 0; } + _Indexer* _M_index; - inline valarray<size_t> - gslice::size () const - { return _M_index ? _M_index->_M_size : valarray<size_t>(); } + template<typename _Tp> friend class valarray; + }; - inline valarray<size_t> - gslice::stride () const - { return _M_index ? _M_index->_M_stride : valarray<size_t>(); } + inline size_t + gslice::start () const + { return _M_index ? _M_index->_M_start : 0; } - inline gslice::gslice () : _M_index(0) {} + inline valarray<size_t> + gslice::size () const + { return _M_index ? _M_index->_M_size : valarray<size_t>(); } - inline - gslice::gslice(size_t __o, const valarray<size_t>& __l, - const valarray<size_t>& __s) - : _M_index(new gslice::_Indexer(__o, __l, __s)) {} + inline valarray<size_t> + gslice::stride () const + { return _M_index ? _M_index->_M_stride : valarray<size_t>(); } - inline - gslice::gslice(const gslice& __g) : _M_index(__g._M_index) - { if (_M_index) _M_index->_M_increment_use(); } + inline gslice::gslice () : _M_index(0) {} - inline - gslice::~gslice() - { if (_M_index && _M_index->_M_decrement_use() == 0) delete _M_index; } + inline + gslice::gslice(size_t __o, const valarray<size_t>& __l, + const valarray<size_t>& __s) + : _M_index(new gslice::_Indexer(__o, __l, __s)) {} - inline gslice& - gslice::operator= (const gslice& __g) - { - if (__g._M_index) __g._M_index->_M_increment_use(); - if (_M_index && _M_index->_M_decrement_use() == 0) delete _M_index; - _M_index = __g._M_index; - return *this; - } + inline + gslice::gslice(const gslice& __g) : _M_index(__g._M_index) + { if (_M_index) _M_index->_M_increment_use(); } + inline + gslice::~gslice() + { + if (_M_index && _M_index->_M_decrement_use() == 0) + delete _M_index; + } -} // std:: + inline gslice& + gslice::operator= (const gslice& __g) + { + if (__g._M_index) + __g._M_index->_M_increment_use(); + if (_M_index && _M_index->_M_decrement_use() == 0) + delete _M_index; + _M_index = __g._M_index; + return *this; + } +_GLIBCXX_END_NAMESPACE #endif /* _GSLICE_H */ - -// Local Variables: -// mode:c++ -// End: |
