1// std::list utilities implementation -*- C++ -*-
2
3// Copyright (C) 2003, 2005 Free Software Foundation, Inc.
4//
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)
9// any later version.
10
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.
15
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
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.
29
30/*
31 *
32 * Copyright (c) 1994
33 * Hewlett-Packard Company
34 *
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.
42 *
43 *
44 * Copyright (c) 1996,1997
45 * Silicon Graphics Computer Systems, Inc.
46 *
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.
54 */
55
56#include <list>
57
58_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD)
59
60  void
61  _List_node_base::swap(_List_node_base& __x, _List_node_base& __y)
62  {
63    if ( __x._M_next != &__x )
64    {
65      if ( __y._M_next != &__y )
66      {
67        // Both __x and __y are not empty.
68        std::swap(__x._M_next,__y._M_next);
69        std::swap(__x._M_prev,__y._M_prev);
70        __x._M_next->_M_prev = __x._M_prev->_M_next = &__x;
71        __y._M_next->_M_prev = __y._M_prev->_M_next = &__y;
72      }
73      else
74      {
75        // __x is not empty, __y is empty.
76        __y._M_next = __x._M_next;
77        __y._M_prev = __x._M_prev;
78        __y._M_next->_M_prev = __y._M_prev->_M_next = &__y;
79        __x._M_next = __x._M_prev = &__x;
80      }
81    }
82    else if ( __y._M_next != &__y )
83    {
84      // __x is empty, __y is not empty.
85      __x._M_next = __y._M_next;
86      __x._M_prev = __y._M_prev;
87      __x._M_next->_M_prev = __x._M_prev->_M_next = &__x;
88      __y._M_next = __y._M_prev = &__y;
89    }
90  }
91
92  void
93  _List_node_base::transfer(_List_node_base * const __first,
94                            _List_node_base * const __last)
95  {
96    if (this != __last)
97    {
98      // Remove [first, last) from its old position.
99      __last->_M_prev->_M_next  = this;
100      __first->_M_prev->_M_next = __last;
101      this->_M_prev->_M_next    = __first;
102
103      // Splice [first, last) into its new position.
104      _List_node_base* const __tmp = this->_M_prev;
105      this->_M_prev                = __last->_M_prev;
106      __last->_M_prev              = __first->_M_prev;
107      __first->_M_prev             = __tmp;
108    }
109  }
110
111  void
112  _List_node_base::reverse()
113  {
114    _List_node_base* __tmp = this;
115    do
116    {
117      std::swap(__tmp->_M_next, __tmp->_M_prev);
118      __tmp = __tmp->_M_prev;     // Old next node is now prev.
119    }
120    while (__tmp != this);
121  }
122
123  void
124  _List_node_base::hook(_List_node_base* const __position)
125  {
126    this->_M_next = __position;
127    this->_M_prev = __position->_M_prev;
128    __position->_M_prev->_M_next = this;
129    __position->_M_prev = this;
130  }
131
132  void
133  _List_node_base::unhook()
134  {
135    _List_node_base* const __next_node = this->_M_next;
136    _List_node_base* const __prev_node = this->_M_prev;
137    __prev_node->_M_next = __next_node;
138    __next_node->_M_prev = __prev_node;
139  }
140
141_GLIBCXX_END_NESTED_NAMESPACE
142
143/* APPLE LOCAL begin libstdc++ abi compatibility fix 6710541 */
144#if defined(__APPLE__) && defined(_GLIBCXX_DEBUG)
145#if ! defined(__arm__)
146#if defined(__x86_64__) || defined(__i386__)
147#define JUMP "jmp "
148#else
149#define JUMP "b "
150#endif
151asm(".text\n"
152    ".globl __ZN10__gnu_norm15_List_node_base4hookEPS0_\n"
153    "__ZN10__gnu_norm15_List_node_base4hookEPS0_:" JUMP "__ZNSt15_List_node_base4hookEPS_\n"
154    ".globl __ZN10__gnu_norm15_List_node_base4swapERS0_S1_\n"
155    "__ZN10__gnu_norm15_List_node_base4swapERS0_S1_:" JUMP "__ZNSt15_List_node_base4swapERS_S0_\n"
156    ".globl __ZN10__gnu_norm15_List_node_base6unhookEv\n"
157    "__ZN10__gnu_norm15_List_node_base6unhookEv:" JUMP "__ZNSt15_List_node_base6unhookEv\n"
158    ".globl __ZN10__gnu_norm15_List_node_base7reverseEv\n"
159    "__ZN10__gnu_norm15_List_node_base7reverseEv:" JUMP "__ZNSt15_List_node_base7reverseEv\n"
160    ".globl __ZN10__gnu_norm15_List_node_base8transferEPS0_S1_\n"
161    "__ZN10__gnu_norm15_List_node_base8transferEPS0_S1_:" JUMP "__ZNSt15_List_node_base8transferEPS_S0_\n");
162#endif
163#endif
164/* APPLE LOCAL end libstdc++ abi compatibility fix 6710541 */
165