kc3-lang/gnulib/lib/file-set.c

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• Hash : d60f3b0c
  Author :
  Date : 2011-01-01T20:17:23
  

  maint: update almost all copyright ranges to include 2011
  
  Run the new "make update-copyright" rule.
  

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• lib/file-set.c

• /* Specialized functions to manipulate a set of files.
     Copyright (C) 2007, 2009-2011 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/>.  */
  
  /* written by Jim Meyering */
  
  #include <config.h>
  #include "file-set.h"
  
  #include "hash-triple.h"
  #include "xalloc.h"
  
  /* Record file, FILE, and dev/ino from *STATS, in the hash table, HT.
     If HT is NULL, return immediately.
     If memory allocation fails, exit immediately.  */
  void
  record_file (Hash_table *ht, char const *file, struct stat const *stats)
  {
    struct F_triple *ent;
  
    if (ht == NULL)
      return;
  
    ent = xmalloc (sizeof *ent);
    ent->name = xstrdup (file);
    ent->st_ino = stats->st_ino;
    ent->st_dev = stats->st_dev;
  
    {
      struct F_triple *ent_from_table = hash_insert (ht, ent);
      if (ent_from_table == NULL)
        {
          /* Insertion failed due to lack of memory.  */
          xalloc_die ();
        }
  
      if (ent_from_table != ent)
        {
          /* There was alread a matching entry in the table, so ENT was
             not inserted.  Free it.  */
          triple_free (ent);
        }
    }
  }
  
  /* Return true if there is an entry in hash table, HT,
     for the file described by FILE and STATS.  */
  bool
  seen_file (Hash_table const *ht, char const *file,
             struct stat const *stats)
  {
    struct F_triple new_ent;
  
    if (ht == NULL)
      return false;
  
    new_ent.name = (char *) file;
    new_ent.st_ino = stats->st_ino;
    new_ent.st_dev = stats->st_dev;
  
    return !!hash_lookup (ht, &new_ent);
  }
  

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