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) {