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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
| | /*
* test-delta.c: test code to exercise diff-delta.c and patch-delta.c
*
* (C) 2005 Nicolas Pitre <nico@fluxnic.net>
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "test-tool.h"
#include "git-compat-util.h"
#include "delta.h"
static const char usage_str[] =
"test-tool delta (-d|-p) <from_file> <data_file> <out_file>";
int cmd__delta(int argc, const char **argv)
{
int fd;
struct stat st;
void *from_buf = NULL, *data_buf = NULL, *out_buf = NULL;
unsigned long from_size, data_size, out_size;
int ret = 1;
if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) {
fprintf(stderr, "usage: %s\n", usage_str);
return 1;
}
fd = open(argv[2], O_RDONLY);
if (fd < 0 || fstat(fd, &st)) {
perror(argv[2]);
return 1;
}
from_size = st.st_size;
from_buf = xmalloc(from_size);
if (read_in_full(fd, from_buf, from_size) < 0) {
perror(argv[2]);
close(fd);
goto cleanup;
}
close(fd);
fd = open(argv[3], O_RDONLY);
if (fd < 0 || fstat(fd, &st)) {
perror(argv[3]);
goto cleanup;
}
data_size = st.st_size;
data_buf = xmalloc(data_size);
if (read_in_full(fd, data_buf, data_size) < 0) {
perror(argv[3]);
close(fd);
goto cleanup;
}
close(fd);
if (argv[1][1] == 'd')
out_buf = diff_delta(from_buf, from_size,
data_buf, data_size,
&out_size, 0);
else
out_buf = patch_delta(from_buf, from_size,
data_buf, data_size,
&out_size);
if (!out_buf) {
fprintf(stderr, "delta operation failed (returned NULL)\n");
goto cleanup;
}
fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666);
if (fd < 0 || write_in_full(fd, out_buf, out_size) < 0) {
perror(argv[4]);
goto cleanup;
}
ret = 0;
cleanup:
free(from_buf);
free(data_buf);
free(out_buf);
return ret;
}
|