83f517994d
2005-08-17 Kelley Cook <kcook@gcc.gnu.org> * All files: Update FSF address. From-SVN: r103192
199 lines
7.2 KiB
C++
199 lines
7.2 KiB
C++
// Memory extensions -*- C++ -*-
|
|
|
|
// Copyright (C) 2002, 2004 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, 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
|
|
// 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).
|
|
*/
|
|
|
|
#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)); }
|
|
|
|
|
|
// An alternative version of uninitialized_copy_n that constructs
|
|
// and destroys objects with a user-provided allocator.
|
|
template<typename _InputIter, typename _Size, typename _ForwardIter,
|
|
typename _Allocator>
|
|
pair<_InputIter, _ForwardIter>
|
|
__uninitialized_copy_n_a(_InputIter __first, _Size __count,
|
|
_ForwardIter __result,
|
|
_Allocator __alloc)
|
|
{
|
|
_ForwardIter __cur = __result;
|
|
try
|
|
{
|
|
for (; __count > 0 ; --__count, ++__first, ++__cur)
|
|
__alloc.construct(&*__cur, *__first);
|
|
return pair<_InputIter, _ForwardIter>(__first, __cur);
|
|
}
|
|
catch(...)
|
|
{
|
|
std::_Destroy(__result, __cur, __alloc);
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
|
|
template<typename _InputIter, typename _Size, typename _ForwardIter,
|
|
typename _Tp>
|
|
inline pair<_InputIter, _ForwardIter>
|
|
__uninitialized_copy_n_a(_InputIter __first, _Size __count,
|
|
_ForwardIter __result,
|
|
std::allocator<_Tp>)
|
|
{
|
|
return uninitialized_copy_n(__first, __count, __result);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
|