summaryrefslogtreecommitdiff
path: root/t/helper/test-bloom.c
blob: ad3ef1cd77ae1b98db3c46980d1439f1ca5f56e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
#include "git-compat-util.h"
#include "bloom.h"
#include "test-tool.h"
#include "commit.h"
 
static struct bloom_filter_settings settings = DEFAULT_BLOOM_FILTER_SETTINGS;
 
static void add_string_to_filter(const char *data, struct bloom_filter *filter) {
		struct bloom_key key;
		int i;
 
		fill_bloom_key(data, strlen(data), &key, &settings);
		printf("Hashes:");
		for (i = 0; i < settings.num_hashes; i++){
			printf("0x%08x|", key.hashes[i]);
		}
		printf("\n");
		add_key_to_filter(&key, filter, &settings);
}
 
static void print_bloom_filter(struct bloom_filter *filter) {
	int i;
 
	if (!filter) {
		printf("No filter.\n");
		return;
	}
	printf("Filter_Length:%d\n", (int)filter->len);
	printf("Filter_Data:");
	for (i = 0; i < filter->len; i++) {
		printf("%02x|", filter->data[i]);
	}
	printf("\n");
}
 
static void get_bloom_filter_for_commit(const struct object_id *commit_oid)
{
	struct commit *c;
	struct bloom_filter *filter;
	setup_git_directory();
	c = lookup_commit(the_repository, commit_oid);
	filter = get_or_compute_bloom_filter(the_repository, c, 1,
					     &settings,
					     NULL);
	print_bloom_filter(filter);
}
 
static const char *bloom_usage = "\n"
"  test-tool bloom get_murmur3 <string>\n"
"  test-tool bloom generate_filter <string> [<string>...]\n"
"  test-tool bloom get_filter_for_commit <commit-hex>\n";
 
int cmd__bloom(int argc, const char **argv)
{
	setup_git_directory();
 
	if (argc < 2)
		usage(bloom_usage);
 
	if (!strcmp(argv[1], "get_murmur3")) {
		uint32_t hashed;
		if (argc < 3)
			usage(bloom_usage);
		hashed = murmur3_seeded(0, argv[2], strlen(argv[2]));
		printf("Murmur3 Hash with seed=0:0x%08x\n", hashed);
	}
 
	if (!strcmp(argv[1], "generate_filter")) {
		struct bloom_filter filter;
		int i = 2;
		filter.len =  (settings.bits_per_entry + BITS_PER_WORD - 1) / BITS_PER_WORD;
		CALLOC_ARRAY(filter.data, filter.len);
 
		if (argc - 1 < i)
			usage(bloom_usage);
 
		while (argv[i]) {
			add_string_to_filter(argv[i], &filter);
			i++;
		}
 
		print_bloom_filter(&filter);
	}
 
	if (!strcmp(argv[1], "get_filter_for_commit")) {
		struct object_id oid;
		const char *end;
		if (argc < 3)
			usage(bloom_usage);
		if (parse_oid_hex(argv[2], &oid, &end))
			die("cannot parse oid '%s'", argv[2]);
		init_bloom_filters();
		get_bloom_filter_for_commit(&oid);
	}
 
	return 0;
}