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annotate lib/search.in.h @ 12937:dbc0820f9ddc

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search: Avoid #define replacements in C++ mode.
author Bruno Haible <bruno@clisp.org>
date Mon, 08 Mar 2010 01:16:01 +0100
parents 2c14f1e449e5
children c7be8484e434
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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 /* The include_next requires a split double-inclusion guard. */
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21 #if @HAVE_SEARCH_H@
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22 # if __GNUC__ >= 3
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23 @PRAGMA_SYSTEM_HEADER@
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24 # endif
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25 # @INCLUDE_NEXT@ @NEXT_SEARCH_H@
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26 #endif
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27
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28 #ifndef _GL_SEARCH_H
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29 #define _GL_SEARCH_H
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30
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31
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32 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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33
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34 /* The definition of _GL_ARG_NONNULL is copied here. */
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35
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36 /* The definition of _GL_WARN_ON_USE is copied here. */
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37
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38
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39 #if @GNULIB_TSEARCH@
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40 # if @REPLACE_TSEARCH@
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41 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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42 # define tsearch rpl_tsearch
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43 # define tfind rpl_tfind
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44 # define tdelete rpl_tdelete
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45 # define twalk rpl_twalk
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46 # endif
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47 # endif
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48
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49 /* See <http://www.opengroup.org/susv3xbd/search.h.html>,
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50 <http://www.opengroup.org/susv3xsh/tsearch.html>
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51 for details. */
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52
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53 # if !@HAVE_TSEARCH@
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54 typedef enum
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55 {
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56 preorder,
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57 postorder,
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58 endorder,
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59 leaf
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60 }
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61 VISIT;
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62 # endif
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63
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64 # ifdef __cplusplus
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65 extern "C" {
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66 # endif
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67 typedef int (*_gl_search_compar_fn) (const void *, const void *);
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68 typedef void (*_gl_search_action_fn) (const void *, VISIT, int);
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69 # ifdef __cplusplus
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70 }
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71 # endif
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72
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73 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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74 If one is found, it is returned. Otherwise, a new element equal to KEY
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75 is inserted in the tree and is returned. */
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76 # if @REPLACE_TSEARCH@
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77 _GL_FUNCDECL_RPL (tsearch, void *,
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78 (const void *key, void **vrootp,
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79 _gl_search_compar_fn compar)
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80 _GL_ARG_NONNULL ((1, 2, 3)));
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81 _GL_CXXALIAS_RPL (tsearch, void *,
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82 (const void *key, void **vrootp,
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83 _gl_search_compar_fn compar));
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84 # else
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85 # if !@HAVE_TSEARCH@
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86 _GL_FUNCDECL_SYS (tsearch, void *,
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87 (const void *key, void **vrootp,
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88 _gl_search_compar_fn compar)
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89 _GL_ARG_NONNULL ((1, 2, 3)));
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90 # endif
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91 _GL_CXXALIAS_SYS (tsearch, void *,
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92 (const void *key, void **vrootp,
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93 _gl_search_compar_fn compar));
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94 # endif
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95 _GL_CXXALIASWARN (tsearch);
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96
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97 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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98 If one is found, it is returned. Otherwise, NULL is returned. */
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99 # if @REPLACE_TSEARCH@
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100 _GL_FUNCDECL_RPL (tfind, void *,
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101 (const void *key, void *const *vrootp,
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102 _gl_search_compar_fn compar)
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103 _GL_ARG_NONNULL ((1, 2, 3)));
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104 _GL_CXXALIAS_RPL (tfind, void *,
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105 (const void *key, void *const *vrootp,
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106 _gl_search_compar_fn compar));
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107 # else
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108 # if !@HAVE_TSEARCH@
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109 _GL_FUNCDECL_SYS (tfind, void *,
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110 (const void *key, void *const *vrootp,
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111 _gl_search_compar_fn compar)
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112 _GL_ARG_NONNULL ((1, 2, 3)));
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113 # endif
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114 /* Need to cast, because on Cygwin 1.5.x systems, the second parameter is
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115 void **vrootp. */
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116 _GL_CXXALIAS_SYS_CAST (tfind, void *,
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117 (const void *key, void *const *vrootp,
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118 _gl_search_compar_fn compar));
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119 # endif
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120 _GL_CXXALIASWARN (tfind);
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121
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122 /* Searches an element in the tree *VROOTP that compares equal to KEY.
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123 If one is found, it is removed from the tree, and its parent node is
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124 returned. Otherwise, NULL is returned. */
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125 # if @REPLACE_TSEARCH@
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126 _GL_FUNCDECL_RPL (tdelete, void *,
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127 (const void *key, void **vrootp,
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128 _gl_search_compar_fn compar)
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129 _GL_ARG_NONNULL ((1, 2, 3)));
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130 _GL_CXXALIAS_RPL (tdelete, void *,
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131 (const void *key, void **vrootp,
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132 _gl_search_compar_fn compar));
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133 # else
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134 # if !@HAVE_TSEARCH@
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135 _GL_FUNCDECL_SYS (tdelete, void *,
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136 (const void *key, void **vrootp,
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137 _gl_search_compar_fn compar)
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138 _GL_ARG_NONNULL ((1, 2, 3)));
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139 # endif
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140 _GL_CXXALIAS_SYS (tdelete, void *,
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141 (const void *key, void **vrootp,
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142 _gl_search_compar_fn compar));
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143 # endif
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144 _GL_CXXALIASWARN (tdelete);
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145
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146 /* Perform a depth-first, left-to-right traversal of the tree VROOT.
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147 The ACTION function is called:
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148 - for non-leaf nodes: 3 times, before the left subtree traversal,
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149 after the left subtree traversal but before the right subtree traversal,
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150 and after the right subtree traversal,
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151 - for leaf nodes: once.
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152 The arguments passed to ACTION are:
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153 1. the node; it can be casted to a 'const void * const *', i.e. into a
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154 pointer to the key,
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155 2. an indicator which visit of the node this is,
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156 3. the level of the node in the tree (0 for the root). */
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157 # if @REPLACE_TSEARCH@
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158 _GL_FUNCDECL_RPL (twalk, void,
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159 (const void *vroot, _gl_search_action_fn action)
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160 _GL_ARG_NONNULL ((2)));
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161 _GL_CXXALIAS_RPL (twalk, void,
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162 (const void *vroot, _gl_search_action_fn action));
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163 # else
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164 # if !@HAVE_TSEARCH@
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165 _GL_FUNCDECL_SYS (twalk, void,
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166 (const void *vroot, _gl_search_action_fn action)
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167 _GL_ARG_NONNULL ((2)));
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168 # endif
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169 _GL_CXXALIAS_SYS (twalk, void,
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170 (const void *vroot, _gl_search_action_fn action));
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171 # endif
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172 _GL_CXXALIASWARN (twalk);
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173
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174 #elif defined GNULIB_POSIXCHECK
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175 # undef tsearch
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176 # if HAVE_RAW_DECL_TSEARCH
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177 _GL_WARN_ON_USE (tsearch, "tsearch is unportable - "
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178 "use gnulib module tsearch for portability");
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179 # endif
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180 # undef tfind
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181 # if HAVE_RAW_DECL_TFIND
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182 _GL_WARN_ON_USE (tfind, "tfind is unportable - "
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183 "use gnulib module tsearch for portability");
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184 # endif
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185 # undef tdelete
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186 # if HAVE_RAW_DECL_TDELETE
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187 _GL_WARN_ON_USE (tdelete, "tdelete is unportable - "
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188 "use gnulib module tsearch for portability");
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189 # endif
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190 # undef twalk
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191 # if HAVE_RAW_DECL_TWALK
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192 _GL_WARN_ON_USE (twalk, "twalk is unportable - "
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193 "use gnulib module tsearch for portability");
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194 # endif
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195 #endif
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196
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197
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198 #endif /* _GL_SEARCH_H */
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199 #endif /* _GL_SEARCH_H */