3 Clusters Bitmap creation code.
5 Free exFAT implementation.
6 Copyright (C) 2011-2013 Andrew Nayenko
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29 static off_t cbm_alignment(void)
31 return get_cluster_size();
34 static off_t cbm_size(void)
37 (get_volume_size() - get_position(&cbm)) / get_cluster_size(),
41 static int cbm_write(struct exfat_dev* dev)
43 uint32_t allocated_clusters =
44 DIV_ROUND_UP(cbm.get_size(), get_cluster_size()) +
45 DIV_ROUND_UP(uct.get_size(), get_cluster_size()) +
46 DIV_ROUND_UP(rootdir.get_size(), get_cluster_size());
47 size_t bitmap_size = DIV_ROUND_UP(allocated_clusters, CHAR_BIT);
48 uint8_t* bitmap = malloc(bitmap_size);
53 exfat_error("failed to allocate bitmap of %zu bytes", bitmap_size);
57 for (i = 0; i < bitmap_size * CHAR_BIT; i++)
58 if (i < allocated_clusters)
62 if (exfat_write(dev, bitmap, bitmap_size) < 0)
64 exfat_error("failed to write bitmap of %zu bytes", bitmap_size);
71 const struct fs_object cbm =
73 .get_alignment = cbm_alignment,