list.cc
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 151 asm(".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 */