75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
|
/* Specialized functions to manipulate a set of files.
|
||
|
|
Copyright (C) 2007, 2009-2020 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 <https://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 already 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);
|
||
|
|
}
|