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annotate lib/search.in.h @ 40057:b06060465f09

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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents ac5267ac9bab
children
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1 /* A GNU-like <search.h>.
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2
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3 Copyright (C) 2007-2019 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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17
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18 #ifndef _@GUARD_PREFIX@_SEARCH_H
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19
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20 #if __GNUC__ >= 3
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21 @PRAGMA_SYSTEM_HEADER@
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22 #endif
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23 @PRAGMA_COLUMNS@
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24
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25 /* The include_next requires a split double-inclusion guard. */
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26 #if @HAVE_SEARCH_H@
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27 # @INCLUDE_NEXT@ @NEXT_SEARCH_H@
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28 #endif
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30 #ifndef _@GUARD_PREFIX@_SEARCH_H
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31 #define _@GUARD_PREFIX@_SEARCH_H
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33
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34 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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35
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36 /* The definition of _GL_ARG_NONNULL is copied here. */
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37
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38 /* The definition of _GL_WARN_ON_USE is copied here. */
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40
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41 #if @GNULIB_TSEARCH@
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42 # if @REPLACE_TSEARCH@
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43 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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44 # define tsearch rpl_tsearch
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45 # define tfind rpl_tfind
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46 # define tdelete rpl_tdelete
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47 # define twalk rpl_twalk
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48 # endif
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49 # endif
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50
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51 /* See <http://www.opengroup.org/susv3xbd/search.h.html>,
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52 <http://www.opengroup.org/susv3xsh/tsearch.html>
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53 for details. */
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54
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55 # if !@HAVE_TYPE_VISIT@
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56 # if !GNULIB_defined_search_types
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57 typedef enum
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58 {
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59 preorder,
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60 postorder,
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61 endorder,
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62 leaf
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63 }
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64 VISIT;
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65 # define GNULIB_defined_search_types 1
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66 # endif
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67 # endif
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68
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69 # ifdef __cplusplus
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70 extern "C" {
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71 # endif
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72 # if !GNULIB_defined_search_fn_types
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73 typedef int (*_gl_search_compar_fn) (const void *, const void *);
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74 typedef void (*_gl_search_action_fn) (const void *, VISIT, int);
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75 # define GNULIB_defined_search_fn_types 1
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76 # endif
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77 # ifdef __cplusplus
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78 }
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79 # endif
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80
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81 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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82 If one is found, it is returned. Otherwise, a new element equal to KEY
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83 is inserted in the tree and is returned. */
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84 # if @REPLACE_TSEARCH@
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85 _GL_FUNCDECL_RPL (tsearch, void *,
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86 (const void *key, void **vrootp,
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87 _gl_search_compar_fn compar)
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88 _GL_ARG_NONNULL ((1, 2, 3)));
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89 _GL_CXXALIAS_RPL (tsearch, void *,
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90 (const void *key, void **vrootp,
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91 _gl_search_compar_fn compar));
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92 # else
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93 # if !@HAVE_TSEARCH@
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94 _GL_FUNCDECL_SYS (tsearch, void *,
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95 (const void *key, void **vrootp,
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96 _gl_search_compar_fn compar)
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97 _GL_ARG_NONNULL ((1, 2, 3)));
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98 # endif
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99 _GL_CXXALIAS_SYS (tsearch, void *,
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100 (const void *key, void **vrootp,
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101 _gl_search_compar_fn compar));
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102 # endif
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103 _GL_CXXALIASWARN (tsearch);
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104
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105 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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106 If one is found, it is returned. Otherwise, NULL is returned. */
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107 # if @REPLACE_TSEARCH@
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108 _GL_FUNCDECL_RPL (tfind, void *,
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109 (const void *key, void *const *vrootp,
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110 _gl_search_compar_fn compar)
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111 _GL_ARG_NONNULL ((1, 2, 3)));
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112 _GL_CXXALIAS_RPL (tfind, void *,
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113 (const void *key, void *const *vrootp,
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114 _gl_search_compar_fn compar));
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115 # else
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116 # if !@HAVE_TSEARCH@
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117 _GL_FUNCDECL_SYS (tfind, void *,
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118 (const void *key, void *const *vrootp,
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119 _gl_search_compar_fn compar)
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120 _GL_ARG_NONNULL ((1, 2, 3)));
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121 # endif
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122 /* Need to cast, because on Cygwin 1.5.x systems, the second parameter is
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123 void **vrootp. */
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124 _GL_CXXALIAS_SYS_CAST (tfind, void *,
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125 (const void *key, void *const *vrootp,
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126 _gl_search_compar_fn compar));
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127 # endif
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128 _GL_CXXALIASWARN (tfind);
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129
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130 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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131 If one is found, it is removed from the tree, and its parent node is
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132 returned. Otherwise, NULL is returned. */
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133 # if @REPLACE_TSEARCH@
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134 _GL_FUNCDECL_RPL (tdelete, void *,
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135 (const void *key, void **vrootp,
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136 _gl_search_compar_fn compar)
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137 _GL_ARG_NONNULL ((1, 2, 3)));
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138 _GL_CXXALIAS_RPL (tdelete, void *,
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139 (const void *key, void **vrootp,
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140 _gl_search_compar_fn compar));
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141 # else
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142 # if !@HAVE_TSEARCH@
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143 _GL_FUNCDECL_SYS (tdelete, void *,
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144 (const void *key, void **vrootp,
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145 _gl_search_compar_fn compar)
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146 _GL_ARG_NONNULL ((1, 2, 3)));
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147 # endif
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148 _GL_CXXALIAS_SYS (tdelete, void *,
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149 (const void *key, void **vrootp,
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150 _gl_search_compar_fn compar));
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151 # endif
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152 _GL_CXXALIASWARN (tdelete);
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153
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154 /* Perform a depth-first, left-to-right traversal of the tree VROOT.
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155 The ACTION function is called:
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156 - for non-leaf nodes: 3 times, before the left subtree traversal,
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157 after the left subtree traversal but before the right subtree traversal,
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158 and after the right subtree traversal,
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159 - for leaf nodes: once.
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160 The arguments passed to ACTION are:
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161 1. the node; it can be cast to a 'const void * const *', i.e. into a
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162 pointer to the key,
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163 2. an indicator which visit of the node this is,
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164 3. the level of the node in the tree (0 for the root). */
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165 # if @REPLACE_TSEARCH@
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166 _GL_FUNCDECL_RPL (twalk, void,
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167 (const void *vroot, _gl_search_action_fn action)
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168 _GL_ARG_NONNULL ((2)));
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169 _GL_CXXALIAS_RPL (twalk, void,
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170 (const void *vroot, _gl_search_action_fn action));
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171 # else
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172 # if !@HAVE_TWALK@
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173 _GL_FUNCDECL_SYS (twalk, void,
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174 (const void *vroot, _gl_search_action_fn action)
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175 _GL_ARG_NONNULL ((2)));
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176 # endif
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177 _GL_CXXALIAS_SYS (twalk, void,
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178 (const void *vroot, _gl_search_action_fn action));
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179 # endif
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180 _GL_CXXALIASWARN (twalk);
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181
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182 /* Flags used by tsearch.c. */
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183 # define GNULIB_defined_tsearch (@REPLACE_TSEARCH@ || !@HAVE_TSEARCH@)
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184 # define GNULIB_defined_twalk (@REPLACE_TSEARCH@ || !@HAVE_TWALK@)
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185
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186 #elif defined GNULIB_POSIXCHECK
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187 # undef tsearch
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188 # if HAVE_RAW_DECL_TSEARCH
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189 _GL_WARN_ON_USE (tsearch, "tsearch is unportable - "
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190 "use gnulib module tsearch for portability");
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191 # endif
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192 # undef tfind
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193 # if HAVE_RAW_DECL_TFIND
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194 _GL_WARN_ON_USE (tfind, "tfind is unportable - "
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195 "use gnulib module tsearch for portability");
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196 # endif
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197 # undef tdelete
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198 # if HAVE_RAW_DECL_TDELETE
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199 _GL_WARN_ON_USE (tdelete, "tdelete is unportable - "
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200 "use gnulib module tsearch for portability");
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201 # endif
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202 # undef twalk
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203 # if HAVE_RAW_DECL_TWALK
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204 _GL_WARN_ON_USE (twalk, "twalk is unportable - "
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205 "use gnulib module tsearch for portability");
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206 # endif
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207 #endif
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208
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209
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210 #endif /* _@GUARD_PREFIX@_SEARCH_H */
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211 #endif /* _@GUARD_PREFIX@_SEARCH_H */