1 // Memory extensions -*- C++ -*-
3 // Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
29 * Hewlett-Packard Company
31 * Permission to use, copy, modify, distribute and sell this software
32 * and its documentation for any purpose is hereby granted without fee,
33 * provided that the above copyright notice appear in all copies and
34 * that both that copyright notice and this permission notice appear
35 * in supporting documentation. Hewlett-Packard Company makes no
36 * representations about the suitability of this software for any
37 * purpose. It is provided "as is" without express or implied warranty.
41 * Silicon Graphics Computer Systems, Inc.
43 * Permission to use, copy, modify, distribute and sell this software
44 * and its documentation for any purpose is hereby granted without fee,
45 * provided that the above copyright notice appear in all copies and
46 * that both that copyright notice and this permission notice appear
47 * in supporting documentation. Silicon Graphics makes no
48 * representations about the suitability of this software for any
49 * purpose. It is provided "as is" without express or implied warranty.
53 * This file is a GNU extension to the Standard C++ Library (possibly
54 * containing extensions from the HP/SGI STL subset).
60 #pragma GCC system_header
63 #include <bits/stl_tempbuf.h>
65 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
69 using std::__iterator_category;
70 using std::_Temporary_buffer;
72 template<typename _InputIter, typename _Size, typename _ForwardIter>
73 pair<_InputIter, _ForwardIter>
74 __uninitialized_copy_n(_InputIter __first, _Size __count,
75 _ForwardIter __result, std::input_iterator_tag)
77 _ForwardIter __cur = __result;
80 for (; __count > 0 ; --__count, ++__first, ++__cur)
81 std::_Construct(&*__cur, *__first);
82 return pair<_InputIter, _ForwardIter>(__first, __cur);
86 std::_Destroy(__result, __cur);
87 __throw_exception_again;
91 template<typename _RandomAccessIter, typename _Size, typename _ForwardIter>
92 inline pair<_RandomAccessIter, _ForwardIter>
93 __uninitialized_copy_n(_RandomAccessIter __first, _Size __count,
94 _ForwardIter __result,
95 std::random_access_iterator_tag)
97 _RandomAccessIter __last = __first + __count;
98 return (pair<_RandomAccessIter, _ForwardIter>
99 (__last, std::uninitialized_copy(__first, __last, __result)));
102 template<typename _InputIter, typename _Size, typename _ForwardIter>
103 inline pair<_InputIter, _ForwardIter>
104 __uninitialized_copy_n(_InputIter __first, _Size __count,
105 _ForwardIter __result)
106 { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result,
107 __iterator_category(__first)); }
110 * @brief Copies the range [first,last) into result.
111 * @param first An input iterator.
112 * @param last An input iterator.
113 * @param result An output iterator.
114 * @return result + (first - last)
115 * @ingroup SGIextensions
117 * Like copy(), but does not require an initialized output range.
119 template<typename _InputIter, typename _Size, typename _ForwardIter>
120 inline pair<_InputIter, _ForwardIter>
121 uninitialized_copy_n(_InputIter __first, _Size __count,
122 _ForwardIter __result)
123 { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result,
124 __iterator_category(__first)); }
127 // An alternative version of uninitialized_copy_n that constructs
128 // and destroys objects with a user-provided allocator.
129 template<typename _InputIter, typename _Size, typename _ForwardIter,
131 pair<_InputIter, _ForwardIter>
132 __uninitialized_copy_n_a(_InputIter __first, _Size __count,
133 _ForwardIter __result,
136 _ForwardIter __cur = __result;
139 for (; __count > 0 ; --__count, ++__first, ++__cur)
140 __alloc.construct(&*__cur, *__first);
141 return pair<_InputIter, _ForwardIter>(__first, __cur);
145 std::_Destroy(__result, __cur, __alloc);
146 __throw_exception_again;
150 template<typename _InputIter, typename _Size, typename _ForwardIter,
152 inline pair<_InputIter, _ForwardIter>
153 __uninitialized_copy_n_a(_InputIter __first, _Size __count,
154 _ForwardIter __result,
157 return __gnu_cxx::uninitialized_copy_n(__first, __count, __result);
161 * This class provides similar behavior and semantics of the standard
162 * functions get_temporary_buffer() and return_temporary_buffer(), but
163 * encapsulated in a type vaguely resembling a standard container.
165 * By default, a temporary_buffer<Iter> stores space for objects of
166 * whatever type the Iter iterator points to. It is constructed from a
167 * typical [first,last) range, and provides the begin(), end(), size()
168 * functions, as well as requested_size(). For non-trivial types, copies
169 * of *first will be used to initialize the storage.
171 * @c malloc is used to obtain underlying storage.
173 * Like get_temporary_buffer(), not all the requested memory may be
174 * available. Ideally, the created buffer will be large enough to hold a
175 * copy of [first,last), but if size() is less than requested_size(),
176 * then this didn't happen.
178 * @ingroup SGIextensions
180 template <class _ForwardIterator, class _Tp
181 = typename std::iterator_traits<_ForwardIterator>::value_type >
182 struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
184 /// Requests storage large enough to hold a copy of [first,last).
185 temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
186 : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { }
188 /// Destroys objects and frees storage.
189 ~temporary_buffer() { }
192 _GLIBCXX_END_NAMESPACE