mirror of
https://github.com/CTCaer/CTCaer-TWRP.git
synced 2024-11-27 04:00:27 +00:00
9c754053b0
Add proper mkdosfs tool Add fuse to TWRP Add experimental exfat-fuse to TWRP Convert all system() functions to use new Exec_Cmd function
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
|
|
cbm.c (09.11.10)
|
|
Clusters Bitmap creation code.
|
|
|
|
Copyright (C) 2011, 2012 Andrew Nayenko
|
|
|
|
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/>.
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include "cbm.h"
|
|
#include "fat.h"
|
|
#include "uct.h"
|
|
#include "rootdir.h"
|
|
|
|
static off64_t cbm_alignment(void)
|
|
{
|
|
return get_cluster_size();
|
|
}
|
|
|
|
static off64_t cbm_size(void)
|
|
{
|
|
return DIV_ROUND_UP(
|
|
(get_volume_size() - get_position(&cbm)) / get_cluster_size(),
|
|
CHAR_BIT);
|
|
}
|
|
|
|
static int cbm_write(struct exfat_dev* dev)
|
|
{
|
|
uint32_t allocated_clusters =
|
|
DIV_ROUND_UP(cbm.get_size(), get_cluster_size()) +
|
|
DIV_ROUND_UP(uct.get_size(), get_cluster_size()) +
|
|
DIV_ROUND_UP(rootdir.get_size(), get_cluster_size());
|
|
size_t bitmap_size = DIV_ROUND_UP(allocated_clusters, CHAR_BIT);
|
|
uint8_t* bitmap = malloc(bitmap_size);
|
|
size_t i;
|
|
|
|
if (bitmap == NULL)
|
|
{
|
|
exfat_error("failed to allocate bitmap of %zu bytes", bitmap_size);
|
|
return 1;
|
|
}
|
|
|
|
for (i = 0; i < bitmap_size * CHAR_BIT; i++)
|
|
if (i < allocated_clusters)
|
|
BMAP_SET(bitmap, i);
|
|
else
|
|
BMAP_CLR(bitmap, i);
|
|
if (exfat_write(dev, bitmap, bitmap_size) < 0)
|
|
{
|
|
exfat_error("failed to write bitmap of %zu bytes", bitmap_size);
|
|
return 1;
|
|
}
|
|
free(bitmap);
|
|
return 0;
|
|
}
|
|
|
|
const struct fs_object cbm =
|
|
{
|
|
.get_alignment = cbm_alignment,
|
|
.get_size = cbm_size,
|
|
.write = cbm_write,
|
|
};
|