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- // Memory extensions -*- C++ -*-
-
- // Copyright (C) 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.
-
- /*
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- */
-
- /** @file ext/memory
- * This file is a GNU extension to the Standard C++ Library (possibly
- * containing extensions from the HP/SGI STL subset). You should only
- * include this header if you are using GCC 3 or later.
- */
-
- #ifndef _EXT_MEMORY
- #define _EXT_MEMORY 1
-
- #pragma GCC system_header
-
- #include <memory>
- #include <bits/stl_tempbuf.h>
-
- namespace __gnu_cxx
- {
- using std::ptrdiff_t;
- using std::pair;
- using std::__iterator_category;
- using std::_Temporary_buffer;
-
- template<typename _InputIter, typename _Size, typename _ForwardIter>
- pair<_InputIter, _ForwardIter>
- __uninitialized_copy_n(_InputIter __first, _Size __count,
- _ForwardIter __result, std::input_iterator_tag)
- {
- _ForwardIter __cur = __result;
- try
- {
- for ( ; __count > 0 ; --__count, ++__first, ++__cur)
- std::_Construct(&*__cur, *__first);
- return pair<_InputIter, _ForwardIter>(__first, __cur);
- }
- catch(...)
- {
- std::_Destroy(__result, __cur);
- __throw_exception_again;
- }
- }
-
- template<typename _RandomAccessIter, typename _Size, typename _ForwardIter>
- inline pair<_RandomAccessIter, _ForwardIter>
- __uninitialized_copy_n(_RandomAccessIter __first, _Size __count,
- _ForwardIter __result,
- std::random_access_iterator_tag)
- {
- _RandomAccessIter __last = __first + __count;
- return pair<_RandomAccessIter, _ForwardIter>(
- __last,
- std::uninitialized_copy(__first, __last, __result));
- }
-
- template<typename _InputIter, typename _Size, typename _ForwardIter>
- inline pair<_InputIter, _ForwardIter>
- __uninitialized_copy_n(_InputIter __first, _Size __count,
- _ForwardIter __result)
- {
- return __uninitialized_copy_n(__first, __count, __result,
- __iterator_category(__first));
- }
-
- /**
- * @brief Copies the range [first,last) into result.
- * @param first An input iterator.
- * @param last An input iterator.
- * @param result An output iterator.
- * @return result + (first - last)
- * @ingroup SGIextensions
- *
- * Like copy(), but does not require an initialized output range.
- */
- template<typename _InputIter, typename _Size, typename _ForwardIter>
- inline pair<_InputIter, _ForwardIter>
- uninitialized_copy_n(_InputIter __first, _Size __count,
- _ForwardIter __result)
- {
- return __uninitialized_copy_n(__first, __count, __result,
- __iterator_category(__first));
- }
-
-
- /**
- * This class provides similar behavior and semantics of the standard
- * functions get_temporary_buffer() and return_temporary_buffer(), but
- * encapsulated in a type vaguely resembling a standard container.
- *
- * By default, a temporary_buffer<Iter> stores space for objects of
- * whatever type the Iter iterator points to. It is constructed from a
- * typical [first,last) range, and provides the begin(), end(), size()
- * functions, as well as requested_size(). For non-trivial types, copies
- * of *first will be used to initialize the storage.
- *
- * @c malloc is used to obtain underlying storage.
- *
- * Like get_temporary_buffer(), not all the requested memory may be
- * available. Ideally, the created buffer will be large enough to hold a
- * copy of [first,last), but if size() is less than requested_size(),
- * then this didn't happen.
- *
- * @ingroup SGIextensions
- */
- template <class _ForwardIterator, class _Tp
- = typename std::iterator_traits<_ForwardIterator>::value_type >
- struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
- {
- /// Requests storage large enough to hold a copy of [first,last).
- temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
- : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { }
-
- /// Destroys objects and frees storage.
- ~temporary_buffer() { }
- };
- } // namespace __gnu_cxx
-
- #endif
-
-