1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* data_writer.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "common.h"
static sqfs_u8 buffer[4096];
int write_data_from_file(const char *filename, sqfs_data_writer_t *data,
sqfs_inode_generic_t *inode, sqfs_file_t *file,
int flags)
{
sqfs_u64 filesz, offset;
size_t diff;
int ret;
ret = sqfs_data_writer_begin_file(data, inode, flags);
if (ret) {
sqfs_perror(filename, "beginning file data blocks", ret);
return -1;
}
sqfs_inode_get_file_size(inode, &filesz);
for (offset = 0; offset < filesz; offset += diff) {
if (filesz - offset > sizeof(buffer)) {
diff = sizeof(buffer);
} else {
diff = filesz - offset;
}
ret = file->read_at(file, offset, buffer, diff);
if (ret) {
sqfs_perror(filename, "reading file range", ret);
return -1;
}
ret = sqfs_data_writer_append(data, buffer, diff);
if (ret) {
sqfs_perror(filename, "packing file data", ret);
return -1;
}
}
ret = sqfs_data_writer_end_file(data);
if (ret) {
sqfs_perror(filename, "finishing file data", ret);
return -1;
}
return 0;
}
|
