lib/hash-triple.c

   1 /* Hash functions for file-related triples: name, device, inode.
   2    Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* written by Jim Meyering */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include "hash-triple.h"
  23
  24 #include "same.h"
  25 #include "same-inode.h"
  26
  27 /* Hash an F_triple, without considering the file name.  */
  28 size_t
  29 triple_hash_no_name (void const *x, size_t table_size)
  30 {
  31   struct F_triple const *p = x;
  32
  33   /* Ignoring the device number here should be fine.  */
  34   return p->st_ino % table_size;
  35 }
  36
  37 /* Compare two F_triple structs.  */
  38 bool
  39 triple_compare (void const *x, void const *y)
  40 {
  41   struct F_triple const *a = x;
  42   struct F_triple const *b = y;
  43   return PSAME_INODE (a, b) && same_name (a->name, b->name);
  44 }