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git.ipfire.org Git - thirdparty/git.git/blob - test-delta.c
2 * test-delta.c: test code to exercise diff-delta.c and patch-delta.c
4 * (C) 2005 Nicolas Pitre <nico@cam.org>
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.
15 #include <sys/types.h>
20 static const char usage
[] =
21 "test-delta (-d|-p) <from_file> <data_file> <out_file>";
23 int main(int argc
, char *argv
[])
27 void *from_buf
, *data_buf
, *out_buf
;
28 unsigned long from_size
, data_size
, out_size
;
30 if (argc
!= 5 || (strcmp(argv
[1], "-d") && strcmp(argv
[1], "-p"))) {
31 fprintf(stderr
, "Usage: %s\n", usage
);
35 fd
= open(argv
[2], O_RDONLY
);
36 if (fd
< 0 || fstat(fd
, &st
)) {
40 from_size
= st
.st_size
;
41 from_buf
= mmap(NULL
, from_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
42 if (from_buf
== MAP_FAILED
) {
49 fd
= open(argv
[3], O_RDONLY
);
50 if (fd
< 0 || fstat(fd
, &st
)) {
54 data_size
= st
.st_size
;
55 data_buf
= mmap(NULL
, data_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
56 if (data_buf
== MAP_FAILED
) {
63 if (argv
[1][1] == 'd')
64 out_buf
= diff_delta(from_buf
, from_size
,
68 out_buf
= patch_delta(from_buf
, from_size
,
72 fprintf(stderr
, "delta operation failed (returned NULL)\n");
76 fd
= open (argv
[4], O_WRONLY
|O_CREAT
|O_TRUNC
, 0666);
77 if (fd
< 0 || write(fd
, out_buf
, out_size
) != out_size
) {