t/helper/test-bloom.c

   1 #include "git-compat-util.h"
   2 #include "bloom.h"
   3 #include "test-tool.h"
   4 #include "commit.h"
   5
   6 static struct bloom_filter_settings settings = DEFAULT_BLOOM_FILTER_SETTINGS;
   7
   8 static void add_string_to_filter(const char *data, struct bloom_filter *filter) {
   9                 struct bloom_key key;
  10                 int i;
  11
  12                 fill_bloom_key(data, strlen(data), &key, &settings);
  13                 printf("Hashes:");
  14                 for (i = 0; i < settings.num_hashes; i++){
  15                         printf("0x%08x|", key.hashes[i]);
  16                 }
  17                 printf("\n");
  18                 add_key_to_filter(&key, filter, &settings);
  19                 clear_bloom_key(&key);
  20 }
  21
  22 static void print_bloom_filter(struct bloom_filter *filter) {
  23         int i;
  24
  25         if (!filter) {
  26                 printf("No filter.\n");
  27                 return;
  28         }
  29         printf("Filter_Length:%d\n", (int)filter->len);
  30         printf("Filter_Data:");
  31         for (i = 0; i < filter->len; i++) {
  32                 printf("%02x|", filter->data[i]);
  33         }
  34         printf("\n");
  35 }
  36
  37 static void get_bloom_filter_for_commit(const struct object_id *commit_oid)
  38 {
  39         struct commit *c;
  40         struct bloom_filter *filter;
  41         setup_git_directory();
  42         c = lookup_commit(the_repository, commit_oid);
  43         filter = get_or_compute_bloom_filter(the_repository, c, 1,
  44                                              &settings,
  45                                              NULL);
  46         print_bloom_filter(filter);
  47 }
  48
  49 static const char *bloom_usage = "\n"
  50 "  test-tool bloom get_murmur3 <string>\n"
  51 "  test-tool bloom generate_filter <string> [<string>...]\n"
  52 "  test-tool bloom get_filter_for_commit <commit-hex>\n";
  53
  54 int cmd__bloom(int argc, const char **argv)
  55 {
  56         setup_git_directory();
  57
  58         if (argc < 2)
  59                 usage(bloom_usage);
  60
  61         if (!strcmp(argv[1], "get_murmur3")) {
  62                 uint32_t hashed;
  63                 if (argc < 3)
  64                         usage(bloom_usage);
  65                 hashed = murmur3_seeded(0, argv[2], strlen(argv[2]));
  66                 printf("Murmur3 Hash with seed=0:0x%08x\n", hashed);
  67         }
  68
  69         if (!strcmp(argv[1], "generate_filter")) {
  70                 struct bloom_filter filter;
  71                 int i = 2;
  72                 filter.len =  (settings.bits_per_entry + BITS_PER_WORD - 1) / BITS_PER_WORD;
  73                 CALLOC_ARRAY(filter.data, filter.len);
  74
  75                 if (argc - 1 < i)
  76                         usage(bloom_usage);
  77
  78                 while (argv[i]) {
  79                         add_string_to_filter(argv[i], &filter);
  80                         i++;
  81                 }
  82
  83                 print_bloom_filter(&filter);
  84                 free(filter.data);
  85         }
  86
  87         if (!strcmp(argv[1], "get_filter_for_commit")) {
  88                 struct object_id oid;
  89                 const char *end;
  90                 if (argc < 3)
  91                         usage(bloom_usage);
  92                 if (parse_oid_hex(argv[2], &oid, &end))
  93                         die("cannot parse oid '%s'", argv[2]);
  94                 init_bloom_filters();
  95                 get_bloom_filter_for_commit(&oid);
  96         }
  97
  98         return 0;
  99 }