1 // Memory extensions -*- C++ -*-
3 // Copyright (C) 2002 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
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12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 // GNU General Public License for more details.
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17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
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28 // the GNU General Public License.
33 * Hewlett-Packard Company
35 * Permission to use, copy, modify, distribute and sell this software
36 * and its documentation for any purpose is hereby granted without fee,
37 * provided that the above copyright notice appear in all copies and
38 * that both that copyright notice and this permission notice appear
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45 * Silicon Graphics Computer Systems, Inc.
47 * Permission to use, copy, modify, distribute and sell this software
48 * and its documentation for any purpose is hereby granted without fee,
49 * provided that the above copyright notice appear in all copies and
50 * that both that copyright notice and this permission notice appear
51 * in supporting documentation. Silicon Graphics makes no
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53 * purpose. It is provided "as is" without express or implied warranty.
57 * This file is a GNU extension to the Standard C++ Library (possibly
58 * containing extensions from the HP/SGI STL subset). You should only
59 * include this header if you are using GCC 3 or later.
65 #pragma GCC system_header
68 #include <bits/stl_tempbuf.h>
74 using std::__iterator_category;
75 using std::_Temporary_buffer;
77 template<typename _InputIter, typename _Size, typename _ForwardIter>
78 pair<_InputIter, _ForwardIter>
79 __uninitialized_copy_n(_InputIter __first, _Size __count,
80 _ForwardIter __result, std::input_iterator_tag)
82 _ForwardIter __cur = __result;
85 for ( ; __count > 0 ; --__count, ++__first, ++__cur)
86 std::_Construct(&*__cur, *__first);
87 return pair<_InputIter, _ForwardIter>(__first, __cur);
91 std::_Destroy(__result, __cur);
92 __throw_exception_again;
96 template<typename _RandomAccessIter, typename _Size, typename _ForwardIter>
97 inline pair<_RandomAccessIter, _ForwardIter>
98 __uninitialized_copy_n(_RandomAccessIter __first, _Size __count,
99 _ForwardIter __result,
100 std::random_access_iterator_tag)
102 _RandomAccessIter __last = __first + __count;
103 return pair<_RandomAccessIter, _ForwardIter>(
105 std::uninitialized_copy(__first, __last, __result));
108 template<typename _InputIter, typename _Size, typename _ForwardIter>
109 inline pair<_InputIter, _ForwardIter>
110 __uninitialized_copy_n(_InputIter __first, _Size __count,
111 _ForwardIter __result)
113 return __uninitialized_copy_n(__first, __count, __result,
114 __iterator_category(__first));
118 * @brief Copies the range [first,last) into result.
119 * @param first An input iterator.
120 * @param last An input iterator.
121 * @param result An output iterator.
122 * @return result + (first - last)
123 * @ingroup SGIextensions
125 * Like copy(), but does not require an initialized output range.
127 template<typename _InputIter, typename _Size, typename _ForwardIter>
128 inline pair<_InputIter, _ForwardIter>
129 uninitialized_copy_n(_InputIter __first, _Size __count,
130 _ForwardIter __result)
132 return __uninitialized_copy_n(__first, __count, __result,
133 __iterator_category(__first));
138 * This class provides similar behavior and semantics of the standard
139 * functions get_temporary_buffer() and return_temporary_buffer(), but
140 * encapsulated in a type vaguely resembling a standard container.
142 * By default, a temporary_buffer<Iter> stores space for objects of
143 * whatever type the Iter iterator points to. It is constructed from a
144 * typical [first,last) range, and provides the begin(), end(), size()
145 * functions, as well as requested_size(). For non-trivial types, copies
146 * of *first will be used to initialize the storage.
148 * @c malloc is used to obtain underlying storage.
150 * Like get_temporary_buffer(), not all the requested memory may be
151 * available. Ideally, the created buffer will be large enough to hold a
152 * copy of [first,last), but if size() is less than requested_size(),
153 * then this didn't happen.
155 * @ingroup SGIextensions
157 template <class _ForwardIterator, class _Tp
158 = typename std::iterator_traits<_ForwardIterator>::value_type >
159 struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
161 /// Requests storage large enough to hold a copy of [first,last).
162 temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
163 : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { }
165 /// Destroys objects and frees storage.
166 ~temporary_buffer() { }
168 } // namespace __gnu_cxx