1 #ifndef MTOOLS_DIRCACHE_H
2 #define MTOOLS_DIRCACHE_H
4 /* Copyright 1997,1999,2001-2003,2008,2009 Alain Knaff.
5 * This file is part of mtools.
7 * Mtools is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * Mtools is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Mtools. If not, see <http://www.gnu.org/licenses/>.
26 } dirCacheEntryType_t;
28 #define DC_BITMAP_SIZE 128
30 typedef struct dirCacheEntry_t dirCacheEntry_t;
32 typedef struct dirCache_t {
33 struct dirCacheEntry_t **entries;
34 unsigned int nr_entries;
35 unsigned int nrHashed;
36 unsigned int bm0[DC_BITMAP_SIZE];
37 unsigned int bm1[DC_BITMAP_SIZE];
38 unsigned int bm2[DC_BITMAP_SIZE];
41 int growDirCache(dirCache_t *cache, unsigned int slot);
42 dirCache_t *allocDirCache(Stream_t *Stream, unsigned int slot);
43 void freeDirCache(Stream_t *Stream);
44 dirCacheEntry_t *addFreeEntry(dirCache_t *Stream,
45 unsigned int begin, unsigned int end);
46 dirCacheEntry_t *addFreeEndEntry(dirCache_t *Stream,
47 unsigned int begin, unsigned int end,
49 dirCacheEntry_t *addEndEntry(dirCache_t *Stream, unsigned int pos);
50 dirCacheEntry_t *lookupInDircache(dirCache_t *Stream, unsigned int pos);