diff options
Diffstat (limited to 'pack-objects.c')
| -rw-r--r-- | pack-objects.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/pack-objects.c b/pack-objects.c index dfa9d44a1..d9328a98d 100644 --- a/pack-objects.c +++ b/pack-objects.c @@ -83,8 +83,8 @@ static void *delta_against(void *buf, unsigned long size, struct object_entry *e if (!otherbuf) die("unable to read %s", sha1_to_hex(entry->delta->sha1)); - delta_buf = diff_delta(buf, size, otherbuf, othersize, &delta_size); - if (delta_size != entry->delta_size) + delta_buf = diff_delta(buf, size, otherbuf, othersize, &delta_size, ~0UL); + if (!delta_buf || delta_size != entry->delta_size) die("delta size changed"); free(buf); free(otherbuf); @@ -292,6 +292,7 @@ static int try_delta(struct unpacked *cur, struct unpacked *old) struct object_entry *cur_entry = cur->entry; struct object_entry *old_entry = old->entry; unsigned long size, oldsize, delta_size; + long max_size; void *delta_buf; /* Don't bother doing diffs between different types */ @@ -300,6 +301,8 @@ static int try_delta(struct unpacked *cur, struct unpacked *old) /* Size is guaranteed to be larger than or equal to oldsize */ size = cur_entry->size; + if (size < 50) + return -1; oldsize = old_entry->size; if (size - oldsize > oldsize / 4) return -1; @@ -311,15 +314,14 @@ static int try_delta(struct unpacked *cur, struct unpacked *old) * more space-efficient (deletes don't have to say _what_ they * delete). */ - delta_buf = diff_delta(cur->data, size, old->data, oldsize, &delta_size); + max_size = size / 2 - 20; + if (cur_entry->delta) + max_size = cur_entry->delta_size-1; + delta_buf = diff_delta(cur->data, size, old->data, oldsize, &delta_size, max_size); if (!delta_buf) - die("unable to create delta"); - if (delta_size + 20 < size / 2) { - if (!cur_entry->delta || cur_entry->delta_size > delta_size) { - cur_entry->delta = old_entry; - cur_entry->delta_size = delta_size; - } - } + return 0; + cur_entry->delta = old_entry; + cur_entry->delta_size = delta_size; free(delta_buf); return 0; } |