Start preparing for 1.8.4.2
[alt-git.git] / test-delta.c
blob4595cd6433f9fd543791ee5a8a59a9112b50c046
1 /*
2 * test-delta.c: test code to exercise diff-delta.c and patch-delta.c
4 * (C) 2005 Nicolas Pitre <nico@fluxnic.net>
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 */
11 #include "git-compat-util.h"
12 #include "delta.h"
13 #include "cache.h"
15 static const char usage_str[] =
16 "test-delta (-d|-p) <from_file> <data_file> <out_file>";
18 int main(int argc, char *argv[])
20 int fd;
21 struct stat st;
22 void *from_buf, *data_buf, *out_buf;
23 unsigned long from_size, data_size, out_size;
25 if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) {
26 fprintf(stderr, "usage: %s\n", usage_str);
27 return 1;
30 fd = open(argv[2], O_RDONLY);
31 if (fd < 0 || fstat(fd, &st)) {
32 perror(argv[2]);
33 return 1;
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;
42 close(fd);
44 fd = open(argv[3], O_RDONLY);
45 if (fd < 0 || fstat(fd, &st)) {
46 perror(argv[3]);
47 return 1;
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;
56 close(fd);
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;
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;
77 return 0;