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/*
* test-delta.c: test code to exercise diff-delta.c and patch-delta.c
*
* (C) 2005 Nicolas Pitre <nico@fluxnic.net>
*
* 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 "test-tool.h"
#include "git-compat-util.h"
#include "delta.h"
static const char usage_str[] =
"test-tool delta (-d|-p) <from_file> <data_file> <out_file>";
int cmd__delta(int argc, const char **argv)
{
int fd;
struct stat st;
void *from_buf = NULL, *data_buf = NULL, *out_buf = NULL;
unsigned long from_size, data_size, out_size;
if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p")))
usage(usage_str);
fd = xopen(argv[2], O_RDONLY);
if (fstat(fd, &st) < 0)
die_errno("fstat(%s)", argv[2]);
from_size = st.st_size;
from_buf = xmalloc(from_size);
if (read_in_full(fd, from_buf, from_size) < 0)
die_errno("read(%s)", argv[2]);
close(fd);
fd = xopen(argv[3], O_RDONLY);
if (fstat(fd, &st) < 0)
die_errno("fstat(%s)", argv[3]);
data_size = st.st_size;
data_buf = xmalloc(data_size);
if (read_in_full(fd, data_buf, data_size) < 0)
die_errno("read(%s)", argv[3]);
close(fd);
if (argv[1][1] == 'd')
out_buf = diff_delta(from_buf, from_size,
data_buf, data_size,
&out_size, 0);
else
out_buf = patch_delta(from_buf, from_size,
data_buf, data_size,
&out_size);
if (!out_buf)
die("delta operation failed (returned NULL)");
fd = xopen(argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666);
if (write_in_full(fd, out_buf, out_size) < 0)
die_errno("write(%s)", argv[4]);
free(from_buf);
free(data_buf);
free(out_buf);
return 0;
}
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