mirror of
https://github.com/git/git.git
synced 2024-12-01 22:13:45 +08:00
a310d43494
This patch adds the basic library functions to create and replay delta information. Also included is a test-delta utility to validate the code. diff-delta was based on LibXDiff written by Davide Libenzi Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
|
|
* test-delta.c: test code to exercise diff-delta.c and patch-delta.c
|
|
*
|
|
* (C) 2005 Nicolas Pitre <nico@cam.org>
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
#include "delta.h"
|
|
|
|
static const char *usage =
|
|
"test-delta (-d|-p) <from_file> <data_file> <out_file>";
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int fd;
|
|
struct stat st;
|
|
void *from_buf, *data_buf, *out_buf;
|
|
unsigned long from_size, data_size, out_size;
|
|
|
|
if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) {
|
|
fprintf(stderr, "Usage: %s\n", usage);
|
|
return 1;
|
|
}
|
|
|
|
fd = open(argv[2], O_RDONLY);
|
|
if (fd < 0 || fstat(fd, &st)) {
|
|
perror(argv[2]);
|
|
return 1;
|
|
}
|
|
from_size = st.st_size;
|
|
from_buf = mmap(NULL, from_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (from_buf == MAP_FAILED) {
|
|
perror(argv[2]);
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
|
|
fd = open(argv[3], O_RDONLY);
|
|
if (fd < 0 || fstat(fd, &st)) {
|
|
perror(argv[3]);
|
|
return 1;
|
|
}
|
|
data_size = st.st_size;
|
|
data_buf = mmap(NULL, data_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (data_buf == MAP_FAILED) {
|
|
perror(argv[3]);
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
|
|
if (argv[1][1] == 'd')
|
|
out_buf = diff_delta(from_buf, from_size,
|
|
data_buf, data_size, &out_size);
|
|
else
|
|
out_buf = patch_delta(from_buf, from_size,
|
|
data_buf, data_size, &out_size);
|
|
if (!out_buf) {
|
|
fprintf(stderr, "delta operation failed (returned NULL)\n");
|
|
return 1;
|
|
}
|
|
|
|
fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666);
|
|
if (fd < 0 || write(fd, out_buf, out_size) != out_size) {
|
|
perror(argv[4]);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|