+
−/* Specialized functions to manipulate a set of files.
+
−   Copyright (C) 2007, 2009-2012 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);
+
−}