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annotate lib/search.in.h @ 13094:2ed0fc659db8

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Emit #pragma system_header after the inclusion guard, not before.
author Bruno Haible <bruno@clisp.org>
date Tue, 30 Mar 2010 02:35:49 +0200
parents c7be8484e434
children a19ace3ba849
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1 /* A GNU-like <search.h>.
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2
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3 Copyright (C) 2007-2010 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 <http://www.gnu.org/licenses/>. */
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17
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18 #ifndef _GL_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
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24 /* The include_next requires a split double-inclusion guard. */
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25 #if @HAVE_SEARCH_H@
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26 # @INCLUDE_NEXT@ @NEXT_SEARCH_H@
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27 #endif
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28
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29 #ifndef _GL_SEARCH_H
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30 #define _GL_SEARCH_H
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31
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32
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33 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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34
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35 /* The definition of _GL_ARG_NONNULL is copied here. */
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36
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37 /* The definition of _GL_WARN_ON_USE is copied here. */
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38
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39
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40 #if @GNULIB_TSEARCH@
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41 # if @REPLACE_TSEARCH@
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42 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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43 # define tsearch rpl_tsearch
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44 # define tfind rpl_tfind
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45 # define tdelete rpl_tdelete
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46 # define twalk rpl_twalk
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47 # endif
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48 # endif
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49
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50 /* See <http://www.opengroup.org/susv3xbd/search.h.html>,
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51 <http://www.opengroup.org/susv3xsh/tsearch.html>
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52 for details. */
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53
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54 # if !@HAVE_TSEARCH@
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55 typedef enum
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56 {
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57 preorder,
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58 postorder,
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59 endorder,
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60 leaf
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61 }
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62 VISIT;
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63 # endif
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64
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65 # ifdef __cplusplus
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66 extern "C" {
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67 # endif
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68 typedef int (*_gl_search_compar_fn) (const void *, const void *);
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69 typedef void (*_gl_search_action_fn) (const void *, VISIT, int);
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70 # ifdef __cplusplus
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71 }
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72 # endif
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73
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74 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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75 If one is found, it is returned. Otherwise, a new element equal to KEY
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76 is inserted in the tree and is returned. */
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77 # if @REPLACE_TSEARCH@
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78 _GL_FUNCDECL_RPL (tsearch, void *,
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79 (const void *key, void **vrootp,
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80 _gl_search_compar_fn compar)
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81 _GL_ARG_NONNULL ((1, 2, 3)));
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82 _GL_CXXALIAS_RPL (tsearch, void *,
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83 (const void *key, void **vrootp,
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84 _gl_search_compar_fn compar));
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85 # else
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86 # if !@HAVE_TSEARCH@
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87 _GL_FUNCDECL_SYS (tsearch, void *,
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88 (const void *key, void **vrootp,
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89 _gl_search_compar_fn compar)
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90 _GL_ARG_NONNULL ((1, 2, 3)));
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91 # endif
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92 _GL_CXXALIAS_SYS (tsearch, void *,
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93 (const void *key, void **vrootp,
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94 _gl_search_compar_fn compar));
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95 # endif
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96 _GL_CXXALIASWARN (tsearch);
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97
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98 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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99 If one is found, it is returned. Otherwise, NULL is returned. */
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100 # if @REPLACE_TSEARCH@
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101 _GL_FUNCDECL_RPL (tfind, void *,
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102 (const void *key, void *const *vrootp,
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103 _gl_search_compar_fn compar)
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104 _GL_ARG_NONNULL ((1, 2, 3)));
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105 _GL_CXXALIAS_RPL (tfind, void *,
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106 (const void *key, void *const *vrootp,
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107 _gl_search_compar_fn compar));
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108 # else
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109 # if !@HAVE_TSEARCH@
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110 _GL_FUNCDECL_SYS (tfind, void *,
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111 (const void *key, void *const *vrootp,
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112 _gl_search_compar_fn compar)
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113 _GL_ARG_NONNULL ((1, 2, 3)));
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114 # endif
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115 /* Need to cast, because on Cygwin 1.5.x systems, the second parameter is
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116 void **vrootp. */
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117 _GL_CXXALIAS_SYS_CAST (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 # endif
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121 _GL_CXXALIASWARN (tfind);
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122
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123 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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124 If one is found, it is removed from the tree, and its parent node is
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125 returned. Otherwise, NULL is returned. */
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126 # if @REPLACE_TSEARCH@
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127 _GL_FUNCDECL_RPL (tdelete, void *,
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128 (const void *key, void **vrootp,
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129 _gl_search_compar_fn compar)
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130 _GL_ARG_NONNULL ((1, 2, 3)));
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131 _GL_CXXALIAS_RPL (tdelete, void *,
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132 (const void *key, void **vrootp,
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133 _gl_search_compar_fn compar));
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134 # else
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135 # if !@HAVE_TSEARCH@
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136 _GL_FUNCDECL_SYS (tdelete, void *,
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137 (const void *key, void **vrootp,
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138 _gl_search_compar_fn compar)
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139 _GL_ARG_NONNULL ((1, 2, 3)));
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140 # endif
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141 _GL_CXXALIAS_SYS (tdelete, void *,
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142 (const void *key, void **vrootp,
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143 _gl_search_compar_fn compar));
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144 # endif
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145 _GL_CXXALIASWARN (tdelete);
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146
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147 /* Perform a depth-first, left-to-right traversal of the tree VROOT.
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148 The ACTION function is called:
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149 - for non-leaf nodes: 3 times, before the left subtree traversal,
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150 after the left subtree traversal but before the right subtree traversal,
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151 and after the right subtree traversal,
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152 - for leaf nodes: once.
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153 The arguments passed to ACTION are:
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154 1. the node; it can be casted to a 'const void * const *', i.e. into a
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155 pointer to the key,
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156 2. an indicator which visit of the node this is,
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157 3. the level of the node in the tree (0 for the root). */
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158 # if @REPLACE_TSEARCH@
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159 _GL_FUNCDECL_RPL (twalk, void,
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160 (const void *vroot, _gl_search_action_fn action)
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161 _GL_ARG_NONNULL ((2)));
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162 _GL_CXXALIAS_RPL (twalk, void,
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163 (const void *vroot, _gl_search_action_fn action));
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164 # else
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165 # if !@HAVE_TSEARCH@
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166 _GL_FUNCDECL_SYS (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 # endif
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170 _GL_CXXALIAS_SYS (twalk, void,
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171 (const void *vroot, _gl_search_action_fn action));
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172 # endif
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173 _GL_CXXALIASWARN (twalk);
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174
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175 #elif defined GNULIB_POSIXCHECK
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176 # undef tsearch
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177 # if HAVE_RAW_DECL_TSEARCH
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178 _GL_WARN_ON_USE (tsearch, "tsearch is unportable - "
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179 "use gnulib module tsearch for portability");
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180 # endif
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181 # undef tfind
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182 # if HAVE_RAW_DECL_TFIND
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183 _GL_WARN_ON_USE (tfind, "tfind is unportable - "
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184 "use gnulib module tsearch for portability");
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185 # endif
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186 # undef tdelete
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187 # if HAVE_RAW_DECL_TDELETE
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188 _GL_WARN_ON_USE (tdelete, "tdelete is unportable - "
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189 "use gnulib module tsearch for portability");
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190 # endif
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191 # undef twalk
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192 # if HAVE_RAW_DECL_TWALK
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193 _GL_WARN_ON_USE (twalk, "twalk is unportable - "
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194 "use gnulib module tsearch for portability");
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195 # endif
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196 #endif
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197
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198
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199 #endif /* _GL_SEARCH_H */
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200 #endif /* _GL_SEARCH_H */