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📄 atomicfwd_c.h(4.64 KB)
📄 atomicfwd_cxx.h(2.85 KB)
📄 basic_ios.h(14.6 KB)
📄 basic_ios.tcc(5.9 KB)
📄 basic_string.h(97.38 KB)
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📄 cmath.tcc(1.61 KB)
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📄 deque.tcc(26.29 KB)
📄 forward_list.h(43.7 KB)
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📄 hashtable.h(1.83 KB)
📄 indirect_array.h(7.63 KB)
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📄 locale_classes.tcc(7.12 KB)
📄 locale_facets.h(88.42 KB)
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📄 locale_facets_nonio.h(63.95 KB)
📄 locale_facets_nonio.tcc(40.15 KB)
📄 localefwd.h(4.94 KB)
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📄 move.h(2.64 KB)
📄 ostream.tcc(12.15 KB)
📄 ostream_insert.h(3.86 KB)
📄 postypes.h(8.01 KB)
📄 shared_ptr.h(47.51 KB)
📄 slice_array.h(9.07 KB)
📄 sstream.tcc(8.84 KB)
📄 stl_algo.h(203 KB)
📄 stl_algobase.h(39.03 KB)
📄 stl_bvector.h(25.58 KB)
📄 stl_construct.h(4.84 KB)
📄 stl_deque.h(59.5 KB)
📄 stl_function.h(21.74 KB)
📄 stl_heap.h(19.59 KB)
📄 stl_iterator.h(32.24 KB)
📄 stl_iterator_base_funcs.h(6.65 KB)
📄 stl_iterator_base_types.h(6.33 KB)
📄 stl_list.h(48.04 KB)
📄 stl_map.h(30.72 KB)
📄 stl_multimap.h(28.77 KB)
📄 stl_multiset.h(24.12 KB)
📄 stl_numeric.h(12.96 KB)
📄 stl_pair.h(8.23 KB)
📄 stl_queue.h(18.34 KB)
📄 stl_raw_storage_iter.h(3.31 KB)
📄 stl_relops.h(4.38 KB)
📄 stl_set.h(24.3 KB)
📄 stl_stack.h(9.51 KB)
📄 stl_tempbuf.h(6.34 KB)
📄 stl_tree.h(42.62 KB)
📄 stl_uninitialized.h(14.76 KB)
📄 stl_vector.h(41.33 KB)
📄 stream_iterator.h(6.27 KB)
📄 streambuf.tcc(4.81 KB)
📄 streambuf_iterator.h(11.89 KB)
📄 stringfwd.h(2.15 KB)
📄 unique_ptr.h(12.41 KB)
📄 valarray_after.h(22.02 KB)
📄 valarray_array.h(21.23 KB)
📄 valarray_array.tcc(7.02 KB)
📄 valarray_before.h(17.78 KB)
📄 vector.tcc(20.63 KB)

Editing: stl_tempbuf.h

// Temporary buffer implementation -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
// 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/*
 *
 * 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) 1996,1997
 * 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 stl_tempbuf.h
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

#ifndef _STL_TEMPBUF_H
#define _STL_TEMPBUF_H 1

#include <bits/stl_algobase.h>
#include <bits/stl_construct.h>
#include <bits/stl_uninitialized.h>

_GLIBCXX_BEGIN_NAMESPACE(std)

/**
   *  @brief Allocates a temporary buffer.
   *  @param  len  The number of objects of type Tp.
   *  @return See full description.
   *
   *  Reinventing the wheel, but this time with prettier spokes!
   *
   *  This function tries to obtain storage for @c len adjacent Tp
   *  objects.  The objects themselves are not constructed, of course.
   *  A pair<> is returned containing "the buffer s address and
   *  capacity (in the units of sizeof(Tp)), or a pair of 0 values if
   *  no storage can be obtained."  Note that the capacity obtained
   *  may be less than that requested if the memory is unavailable;
   *  you should compare len with the .second return value.
   *
   * Provides the nothrow exception guarantee.
   */
  template<typename _Tp>
    pair<_Tp*, ptrdiff_t>
    get_temporary_buffer(ptrdiff_t __len)
    {
      const ptrdiff_t __max =
	__gnu_cxx::__numeric_traits<ptrdiff_t>::__max / sizeof(_Tp);
      if (__len > __max)
	__len = __max;
      
      while (__len > 0) 
	{
	  _Tp* __tmp = static_cast<_Tp*>(::operator new(__len * sizeof(_Tp), 
							std::nothrow));
	  if (__tmp != 0)
	    return std::pair<_Tp*, ptrdiff_t>(__tmp, __len);
	  __len /= 2;
	}
      return std::pair<_Tp*, ptrdiff_t>(static_cast<_Tp*>(0), 0);
    }

/**
   *  @brief The companion to get_temporary_buffer().
   *  @param  p  A buffer previously allocated by get_temporary_buffer.
   *  @return   None.
   *
   *  Frees the memory pointed to by p.
   */
  template<typename _Tp>
    inline void
    return_temporary_buffer(_Tp* __p)
    { ::operator delete(__p, std::nothrow); }

/**
   *  This class is used in two places: stl_algo.h and ext/memory,
   *  where it is wrapped as the temporary_buffer class.  See
   *  temporary_buffer docs for more notes.
   */
  template<typename _ForwardIterator, typename _Tp>
    class _Temporary_buffer
    {
      // concept requirements
      __glibcxx_class_requires(_ForwardIterator, _ForwardIteratorConcept)

public:
      typedef _Tp         value_type;
      typedef value_type* pointer;
      typedef pointer     iterator;
      typedef ptrdiff_t   size_type;

protected:
      size_type  _M_original_len;
      size_type  _M_len;
      pointer    _M_buffer;

public:
      /// As per Table mumble.
      size_type
      size() const
      { return _M_len; }

/// Returns the size requested by the constructor; may be >size().
      size_type
      requested_size() const
      { return _M_original_len; }

/// As per Table mumble.
      iterator
      begin()
      { return _M_buffer; }

/// As per Table mumble.
      iterator
      end()
      { return _M_buffer + _M_len; }

/**
       * Constructs a temporary buffer of a size somewhere between
       * zero and the size of the given range.
       */
      _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last);

~_Temporary_buffer()
      {
	std::_Destroy(_M_buffer, _M_buffer + _M_len);
	std::return_temporary_buffer(_M_buffer);
      }

private:
      // Disable copy constructor and assignment operator.
      _Temporary_buffer(const _Temporary_buffer&);

void
      operator=(const _Temporary_buffer&);
    };

template<typename _ForwardIterator, typename _Tp>
    _Temporary_buffer<_ForwardIterator, _Tp>::
    _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
    : _M_original_len(std::distance(__first, __last)),
      _M_len(0), _M_buffer(0)
    {
      __try
	{
	  std::pair<pointer, size_type> __p(std::get_temporary_buffer<
					    value_type>(_M_original_len));
	  _M_buffer = __p.first;
	  _M_len = __p.second;
	  if (!__is_pod(_Tp) && _M_len > 0)
	    std::uninitialized_fill_n(_M_buffer, _M_len, *__first);
	}
      __catch(...)
	{
	  std::return_temporary_buffer(_M_buffer);
	  _M_buffer = 0;
	  _M_len = 0;
	  __throw_exception_again;
	}
    }

_GLIBCXX_END_NAMESPACE

#endif /* _STL_TEMPBUF_H */

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