1 /*
2 * test-delta.c: test code to exercise diff-delta.c and patch-delta.c
3 *
4 * (C) 2005 Nicolas Pitre <nico@fluxnic.net>
5 *
6 * This code is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include "test-tool.h"
12 #include "git-compat-util.h"
13 #include "delta.h"
14 #include "cache.h"
15
16 static const char usage_str[] =
17 "test-tool delta (-d|-p) <from_file> <data_file> <out_file>";
18
cmd__delta(int argc,const char ** argv)19 int cmd__delta(int argc, const char **argv)
20 {
21 int fd;
22 struct stat st;
23 void *from_buf, *data_buf, *out_buf;
24 unsigned long from_size, data_size, out_size;
25
26 if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) {
27 fprintf(stderr, "usage: %s\n", usage_str);
28 return 1;
29 }
30
31 fd = open(argv[2], O_RDONLY);
32 if (fd < 0 || fstat(fd, &st)) {
33 perror(argv[2]);
34 return 1;
35 }
36 from_size = st.st_size;
37 from_buf = xmalloc(from_size);
38 if (read_in_full(fd, from_buf, from_size) < 0) {
39 perror(argv[2]);
40 close(fd);
41 return 1;
42 }
43 close(fd);
44
45 fd = open(argv[3], O_RDONLY);
46 if (fd < 0 || fstat(fd, &st)) {
47 perror(argv[3]);
48 return 1;
49 }
50 data_size = st.st_size;
51 data_buf = xmalloc(data_size);
52 if (read_in_full(fd, data_buf, data_size) < 0) {
53 perror(argv[3]);
54 close(fd);
55 return 1;
56 }
57 close(fd);
58
59 if (argv[1][1] == 'd')
60 out_buf = diff_delta(from_buf, from_size,
61 data_buf, data_size,
62 &out_size, 0);
63 else
64 out_buf = patch_delta(from_buf, from_size,
65 data_buf, data_size,
66 &out_size);
67 if (!out_buf) {
68 fprintf(stderr, "delta operation failed (returned NULL)\n");
69 return 1;
70 }
71
72 fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666);
73 if (fd < 0 || write_in_full(fd, out_buf, out_size) < 0) {
74 perror(argv[4]);
75 return 1;
76 }
77
78 return 0;
79 }
80