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 */
/*
* compare_file_sfqs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "difftool.h"
static unsigned char a_buf[MAX_WINDOW_SIZE];
static unsigned char b_buf[MAX_WINDOW_SIZE];
int compare_files(file_info_t *a, file_info_t *b, const char *path)
{
uint64_t offset, diff;
ssize_t ret;
if (a->size != b->size)
goto out_different;
if (compare_flags & COMPARE_NO_CONTENTS)
return 0;
for (offset = 0; offset < a->size; offset += diff) {
diff = a->size - offset;
if (diff > MAX_WINDOW_SIZE)
diff = MAX_WINDOW_SIZE;
ret = data_reader_read(sqfs_a.data, a, offset, a_buf, diff);
if (ret < 0 || (size_t)ret < diff) {
fprintf(stderr, "Failed to read %s from %s\n",
path, first_path);
return -1;
}
ret = data_reader_read(sqfs_b.data, b, offset, b_buf, diff);
if (ret < 0 || (size_t)ret < diff) {
fprintf(stderr, "Failed to read %s from %s\n",
path, second_path);
return -1;
}
if (memcmp(a_buf, b_buf, diff) != 0)
goto out_different;
}
return 0;
out_different:
if (compare_flags & COMPARE_EXTRACT_FILES) {
if (extract_files(a, b, path))
return -1;
}
return 1;
}
|
