kc3-lang/gnulib/lib/search.in.h

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• Hash : 06cd74c1
  Author :
  Date : 2008-01-10T02:46:55
  

  Work around OpenBSD 4.0 tdelete() bug.
  

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• lib/search.in.h

• /* A GNU-like <search.h>.
  
     Copyright (C) 2007-2008 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #ifndef _GL_SEARCH_H
  
  /* The include_next requires a split double-inclusion guard.  */
  #if @HAVE_SEARCH_H@
  # @INCLUDE_NEXT@ @NEXT_SEARCH_H@
  #endif
  
  #ifndef _GL_SEARCH_H
  #define _GL_SEARCH_H
  
  
  /* The definition of GL_LINK_WARNING is copied here.  */
  
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  #if @GNULIB_TSEARCH@
  # if @REPLACE_TSEARCH@
  #  define tsearch rpl_tsearch
  #  define tfind rpl_tfind
  #  define tdelete rpl_tdelete
  #  define twalk rpl_twalk
  # endif
  # if !@HAVE_TSEARCH@ || @REPLACE_TSEARCH@
  
  /* See <http://www.opengroup.org/susv3xbd/search.h.html>,
         <http://www.opengroup.org/susv3xsh/tsearch.html>
     for details.  */
  
  #  if !@HAVE_TSEARCH@
  typedef enum
  {
    preorder,
    postorder,
    endorder,
    leaf
  }
  VISIT;
  #  endif
  
  /* Searches an element in the tree *VROOTP that compares equal to KEY.
     If one is found, it is returned.  Otherwise, a new element equal to KEY
     is inserted in the tree and is returned.  */
  extern void * tsearch (const void *key, void **vrootp,
  		       int (*compar) (const void *, const void *));
  
  /* Searches an element in the tree *VROOTP that compares equal to KEY.
     If one is found, it is returned.  Otherwise, NULL is returned.  */
  extern void * tfind (const void *key, void *const *vrootp,
  		     int (*compar) (const void *, const void *));
  
  /* Searches an element in the tree *VROOTP that compares equal to KEY.
     If one is found, it is removed from the tree, and its parent node is
     returned.  Otherwise, NULL is returned.  */
  extern void * tdelete (const void *key, void **vrootp,
  		       int (*compar) (const void *, const void *));
  
  /* Perform a depth-first, left-to-right traversal of the tree VROOT.
     The ACTION function is called:
       - for non-leaf nodes: 3 times, before the left subtree traversal,
         after the left subtree traversal but before the right subtree traversal,
         and after the right subtree traversal,
       - for leaf nodes: once.
     The arguments passed to ACTION are:
       1. the node; it can be casted to a 'const void * const *', i.e. into a
          pointer to the key,
       2. an indicator which visit of the node this is,
       3. the level of the node in the tree (0 for the root).  */
  extern void twalk (const void *vroot,
  		   void (*action) (const void *, VISIT, int));
  
  # endif
  #elif defined GNULIB_POSIXCHECK
  # undef tsearch
  # define tsearch(k,v,c) \
      (GL_LINK_WARNING ("tsearch is unportable - " \
                        "use gnulib module tsearch for portability"), \
       tsearch (k, v, c))
  # undef tfind
  # define tfind(k,v,c) \
      (GL_LINK_WARNING ("tfind is unportable - " \
                        "use gnulib module tsearch for portability"), \
       tfind (k, v, c))
  # undef tdelete
  # define tdelete(k,v,c) \
      (GL_LINK_WARNING ("tdelete is unportable - " \
                        "use gnulib module tsearch for portability"), \
       tdelete (k, v, c))
  # undef twalk
  # define twalk(v,a) \
      (GL_LINK_WARNING ("twalk is unportable - " \
                        "use gnulib module tsearch for portability"), \
       twalk (v, a))
  #endif
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _GL_SEARCH_H */
  #endif /* _GL_SEARCH_H */
  

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