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
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
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
27 // invalidate any other reasons why the executable file might be covered by
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
39 * in supporting documentation. Hewlett-Packard Company makes no
40 * representations about the suitability of this software for any
41 * purpose. It is provided "as is" without express or implied warranty.
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
52 * representations about the suitability of this software for any
53 * purpose. It is provided "as is" without express or implied warranty.
59 #pragma GCC system_header
66 using std::__iterator_category;
67 using std::_Temporary_buffer;
69 // uninitialized_copy_n (not part of the C++ standard)
71 template<typename _InputIter, typename _Size, typename _ForwardIter>
72 pair<_InputIter, _ForwardIter>
73 __uninitialized_copy_n(_InputIter __first, _Size __count,
74 _ForwardIter __result,
75 std::input_iterator_tag)
77 _ForwardIter __cur = __result;
79 for ( ; __count > 0 ; --__count, ++__first, ++__cur)
80 std::_Construct(&*__cur, *__first);
81 return pair<_InputIter, _ForwardIter>(__first, __cur);
85 std::_Destroy(__result, __cur);
86 __throw_exception_again;
90 template<typename _RandomAccessIter, typename _Size, typename _ForwardIter>
91 inline pair<_RandomAccessIter, _ForwardIter>
92 __uninitialized_copy_n(_RandomAccessIter __first, _Size __count,
93 _ForwardIter __result,
94 std::random_access_iterator_tag)
96 _RandomAccessIter __last = __first + __count;
97 return pair<_RandomAccessIter, _ForwardIter>(
99 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 __uninitialized_copy_n(__first, __count, __result,
107 __iterator_category(__first));
111 * @brief Copies the range [first,last) into result.
112 * @param first An input iterator.
113 * @param last An input iterator.
114 * @param result An output iterator.
115 * @return result + (first - last)
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 __uninitialized_copy_n(__first, __count, __result,
124 __iterator_category(__first));
128 pair<_Tp*, ptrdiff_t>
129 __get_temporary_buffer(ptrdiff_t __len, _Tp*)
131 if (__len > ptrdiff_t(INT_MAX / sizeof(_Tp)))
132 __len = INT_MAX / sizeof(_Tp);
135 _Tp* __tmp = (_Tp*) std::malloc((std::size_t)__len * sizeof(_Tp));
137 return pair<_Tp*, ptrdiff_t>(__tmp, __len);
141 return pair<_Tp*, ptrdiff_t>((_Tp*)0, 0);
145 * This is a mostly-useless wrapper around malloc().
148 inline pair<_Tp*, ptrdiff_t> get_temporary_buffer(ptrdiff_t __len) {
149 return __get_temporary_buffer(__len, (_Tp*) 0);
153 * The companion to get_temporary_buffer().
156 void return_temporary_buffer(_Tp* __p) {
160 // Class temporary_buffer is not part of the standard. It is an extension.
162 template <class _ForwardIterator,
164 = typename std::iterator_traits<_ForwardIterator>::value_type
166 struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
168 temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
169 : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) {}
170 ~temporary_buffer() {}
173 } // namespace __gnu_cxx
175 #endif /* _EXT_MEMORY */