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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 "git-compat-util.h" | |
12 | #include "delta.h" | |
13 | #include "cache.h" | |
14 | ||
15 | static const char usage_str[] = | |
16 | "test-delta (-d|-p) <from_file> <data_file> <out_file>"; | |
17 | ||
18 | int main(int argc, char *argv[]) | |
19 | { | |
20 | int fd; | |
21 | struct stat st; | |
22 | void *from_buf, *data_buf, *out_buf; | |
23 | unsigned long from_size, data_size, out_size; | |
24 | ||
25 | if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) { | |
26 | fprintf(stderr, "Usage: %s\n", usage_str); | |
27 | return 1; | |
28 | } | |
29 | ||
30 | fd = open(argv[2], O_RDONLY); | |
31 | if (fd < 0 || fstat(fd, &st)) { | |
32 | perror(argv[2]); | |
33 | return 1; | |
34 | } | |
35 | from_size = st.st_size; | |
36 | from_buf = mmap(NULL, from_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
37 | if (from_buf == MAP_FAILED) { | |
38 | perror(argv[2]); | |
39 | close(fd); | |
40 | return 1; | |
41 | } | |
42 | close(fd); | |
43 | ||
44 | fd = open(argv[3], O_RDONLY); | |
45 | if (fd < 0 || fstat(fd, &st)) { | |
46 | perror(argv[3]); | |
47 | return 1; | |
48 | } | |
49 | data_size = st.st_size; | |
50 | data_buf = mmap(NULL, data_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
51 | if (data_buf == MAP_FAILED) { | |
52 | perror(argv[3]); | |
53 | close(fd); | |
54 | return 1; | |
55 | } | |
56 | close(fd); | |
57 | ||
58 | if (argv[1][1] == 'd') | |
59 | out_buf = diff_delta(from_buf, from_size, | |
60 | data_buf, data_size, | |
61 | &out_size, 0); | |
62 | else | |
63 | out_buf = patch_delta(from_buf, from_size, | |
64 | data_buf, data_size, | |
65 | &out_size); | |
66 | if (!out_buf) { | |
67 | fprintf(stderr, "delta operation failed (returned NULL)\n"); | |
68 | return 1; | |
69 | } | |
70 | ||
71 | fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666); | |
72 | if (fd < 0 || write_in_full(fd, out_buf, out_size) != out_size) { | |
73 | perror(argv[4]); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | return 0; | |
78 | } |