/**
* Build the initial type index for the packfile
*/
void bitmap_writer_build_type_index(struct packing_data *to_pack,
struct pack_idx_entry **index,
uint32_t index_nr)
{
uint32_t i;
writer.commits = ewah_new();
writer.trees = ewah_new();
writer.blobs = ewah_new();
writer.tags = ewah_new();
ALLOC_ARRAY(to_pack->in_pack_pos, to_pack->nr_objects);
for (i = 0; i < index_nr; ++i) {
struct object_entry *entry = (struct object_entry *)index[i];
enum object_type real_type;
oe_set_in_pack_pos(to_pack, entry, i);
switch (oe_type(entry)) {
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
real_type = oe_type(entry);
break;
default:
real_type = oid_object_info(to_pack->repo,
&entry->idx.oid, NULL);
break;
}
switch (real_type) {
case OBJ_COMMIT:
ewah_set(writer.commits, i);
break;
case OBJ_TREE:
ewah_set(writer.trees, i);
break;
case OBJ_BLOB:
ewah_set(writer.blobs, i);
break;
case OBJ_TAG:
ewah_set(writer.tags, i);
break;
default:
die("Missing type information for %s (%d/%d)",
oid_to_hex(&entry->idx.oid), real_type,
oe_type(entry));
}
}
}
/**
* Build the initial type index for the packfile
*/
void bitmap_writer_build_type_index(struct pack_idx_entry **index,
uint32_t index_nr)
{
uint32_t i;
writer.commits = ewah_new();
writer.trees = ewah_new();
writer.blobs = ewah_new();
writer.tags = ewah_new();
for (i = 0; i < index_nr; ++i) {
struct object_entry *entry = (struct object_entry *)index[i];
enum object_type real_type;
entry->in_pack_pos = i;
switch (entry->type) {
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
real_type = entry->type;
break;
default:
real_type = sha1_object_info(entry->idx.sha1, NULL);
break;
}
switch (real_type) {
case OBJ_COMMIT:
ewah_set(writer.commits, i);
break;
case OBJ_TREE:
ewah_set(writer.trees, i);
break;
case OBJ_BLOB:
ewah_set(writer.blobs, i);
break;
case OBJ_TAG:
ewah_set(writer.tags, i);
break;
default:
die("Missing type information for %s (%d/%d)",
sha1_to_hex(entry->idx.sha1), real_type, entry->type);
}
}
}
int read_fsmonitor_extension(struct index_state *istate, const void *data,
unsigned long sz)
{
const char *index = data;
uint32_t hdr_version;
uint32_t ewah_size;
struct ewah_bitmap *fsmonitor_dirty;
int ret;
if (sz < sizeof(uint32_t) + sizeof(uint64_t) + sizeof(uint32_t))
return error("corrupt fsmonitor extension (too short)");
hdr_version = get_be32(index);
index += sizeof(uint32_t);
if (hdr_version != INDEX_EXTENSION_VERSION)
return error("bad fsmonitor version %d", hdr_version);
istate->fsmonitor_last_update = get_be64(index);
index += sizeof(uint64_t);
ewah_size = get_be32(index);
index += sizeof(uint32_t);
fsmonitor_dirty = ewah_new();
ret = ewah_read_mmap(fsmonitor_dirty, index, ewah_size);
if (ret != ewah_size) {
ewah_free(fsmonitor_dirty);
return error("failed to parse ewah bitmap reading fsmonitor index extension");
}
istate->fsmonitor_dirty = fsmonitor_dirty;
trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
return 0;
}
struct ewah_bitmap *bitmap_compress(struct bitmap *bitmap)
{
struct ewah_bitmap *ewah = ewah_new();
size_t i, running_empty_words = 0;
eword_t last_word = 0;
for (i = 0; i < bitmap->word_alloc; ++i) {
if (bitmap->words[i] == 0) {
running_empty_words++;
continue;
}
if (last_word != 0) {
ewah_add(ewah, last_word);
}
if (running_empty_words > 0) {
ewah_add_empty_words(ewah, false, running_empty_words);
running_empty_words = 0;
}
last_word = bitmap->words[i];
}
ewah_add(ewah, last_word);
return ewah;
}
struct ewah_bitmap *ewah_pool_new(void)
{
if (bitmap_pool_size)
return bitmap_pool[--bitmap_pool_size];
return ewah_new();
}
static void test_for_size(size_t size)
{
struct ewah_bitmap *a = generate_bitmap(size);
struct ewah_bitmap *b = generate_bitmap(size);
struct ewah_bitmap *result = ewah_new();
size_t i;
struct {
const char *name;
void (*generate)(struct ewah_bitmap *, struct ewah_bitmap *, struct ewah_bitmap *);
size_t (*check)(size_t, size_t);
} tests[] = {
{"or", &ewah_or, &op_or},
{"xor", &ewah_xor, &op_xor},
{"and", &ewah_and, &op_and},
{"and-not", &ewah_and_not, &op_andnot}
};
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i) {
fprintf(stderr, "'%s' in %zu bits... ", tests[i].name, size);
tests[i].generate(a, b, result);
if (verify_operation(a, b, result, tests[i].check))
fprintf(stderr, "OK\n");
ewah_clear(result);
}
ewah_free(a);
ewah_free(b);
ewah_free(result);
}
void fill_fsmonitor_bitmap(struct index_state *istate)
{
int i;
istate->fsmonitor_dirty = ewah_new();
for (i = 0; i < istate->cache_nr; i++)
if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
ewah_set(istate->fsmonitor_dirty, i);
}
static struct ewah_bitmap *generate_bitmap(size_t max_size)
{
static const size_t BIT_CHANCE = 50;
struct ewah_bitmap *bitmap = ewah_new();
size_t i;
for (i = 0; i < max_size; ++i) {
if (rand() % 100 <= BIT_CHANCE)
ewah_set(bitmap, i);
}
return bitmap;
}
