diff options
| -rw-r--r-- | index-pack.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/index-pack.c b/index-pack.c index fffddd25c..56c590e3f 100644 --- a/index-pack.c +++ b/index-pack.c @@ -23,6 +23,12 @@ union delta_base { unsigned long offset; }; +/* + * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want + * to memcmp() only the first 20 bytes. + */ +#define UNION_BASE_SZ 20 + struct delta_entry { struct object_entry *obj; @@ -211,7 +217,7 @@ static int find_delta(const union delta_base *base) struct delta_entry *delta = &deltas[next]; int cmp; - cmp = memcmp(base, &delta->base, sizeof(*base)); + cmp = memcmp(base, &delta->base, UNION_BASE_SZ); if (!cmp) return next; if (cmp < 0) { @@ -232,9 +238,9 @@ static int find_delta_childs(const union delta_base *base, if (first < 0) return -1; - while (first > 0 && !memcmp(&deltas[first - 1].base, base, sizeof(*base))) + while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ)) --first; - while (last < end && !memcmp(&deltas[last + 1].base, base, sizeof(*base))) + while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ)) ++last; *first_index = first; *last_index = last; @@ -312,7 +318,7 @@ static int compare_delta_entry(const void *a, const void *b) { const struct delta_entry *delta_a = a; const struct delta_entry *delta_b = b; - return memcmp(&delta_a->base, &delta_b->base, sizeof(union delta_base)); + return memcmp(&delta_a->base, &delta_b->base, UNION_BASE_SZ); } static void parse_pack_objects(void) |