Let's avoid the open coded pack index reference in pack-object and use
nth_packed_object_sha1() instead. This will help encapsulating index
format differences in one place.
And while at it there is no reason to copy SHA1's over and over while a
direct pointer to it in the index will do just fine.
Signed-off-by: Nicolas Pitre <nico@xxxxxxx>
---
diff --git a/builtin-fsck.c b/builtin-fsck.c
index 21f1f9e..4e5aa33 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -348,7 +348,7 @@ static int fsck_tag(struct tag *tag)
return 0;
}
-static int fsck_sha1(unsigned char *sha1)
+static int fsck_sha1(const unsigned char *sha1)
{
struct object *obj = parse_object(sha1);
if (!obj) {
@@ -648,11 +648,8 @@ int cmd_fsck(int argc, char **argv, const char *prefix)
for (p = packed_git; p; p = p->next) {
uint32_t i, num = num_packed_objects(p);
- for (i = 0; i < num; i++) {
- unsigned char sha1[20];
- nth_packed_object_sha1(p, i, sha1);
- fsck_sha1(sha1);
- }
+ for (i = 0; i < num; i++)
+ fsck_sha1(nth_packed_object_sha1(p, i));
}
}
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index b5f9648..45ac3e4 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -222,7 +222,7 @@ static const unsigned char *find_packed_object_name(struct packed_git *p,
off_t ofs)
{
struct revindex_entry *entry = find_packed_object(p, ofs);
- return ((unsigned char *)p->index_data) + 4 * 256 + 24 * entry->nr + 4;
+ return nth_packed_object_sha1(p, entry->nr);
}
static void *delta_against(void *buf, unsigned long size, struct object_entry *entry)
diff --git a/cache.h b/cache.h
index 7199430..710554f 100644
--- a/cache.h
+++ b/cache.h
@@ -435,7 +435,7 @@ extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t
extern void unuse_pack(struct pack_window **);
extern struct packed_git *add_packed_git(const char *, int, int);
extern uint32_t num_packed_objects(const struct packed_git *p);
-extern int nth_packed_object_sha1(const struct packed_git *, uint32_t, unsigned char*);
+extern const unsigned char *nth_packed_object_sha1(const struct packed_git *, uint32_t);
extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
diff --git a/pack-check.c b/pack-check.c
index d988322..f58083d 100644
--- a/pack-check.c
+++ b/pack-check.c
@@ -42,13 +42,14 @@ static int verify_packfile(struct packed_git *p,
*/
nr_objects = num_packed_objects(p);
for (i = 0, err = 0; i < nr_objects; i++) {
- unsigned char sha1[20];
+ const unsigned char *sha1;
void *data;
enum object_type type;
unsigned long size;
off_t offset;
- if (nth_packed_object_sha1(p, i, sha1))
+ sha1 = nth_packed_object_sha1(p, i);
+ if (!sha1)
die("internal error pack-check nth-packed-object");
offset = find_pack_entry_one(sha1, p);
if (!offset)
@@ -82,14 +83,16 @@ static void show_pack_info(struct packed_git *p)
memset(chain_histogram, 0, sizeof(chain_histogram));
for (i = 0; i < nr_objects; i++) {
- unsigned char sha1[20], base_sha1[20];
+ const unsigned char *sha1;
+ unsigned char base_sha1[20];
const char *type;
unsigned long size;
unsigned long store_size;
off_t offset;
unsigned int delta_chain_length;
- if (nth_packed_object_sha1(p, i, sha1))
+ sha1 = nth_packed_object_sha1(p, i);
+ if (!sha1)
die("internal error pack-check nth-packed-object");
offset = find_pack_entry_one(sha1, p);
if (!offset)
diff --git a/sha1_file.c b/sha1_file.c
index 9c26038..4304fe9 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1532,15 +1532,14 @@ uint32_t num_packed_objects(const struct packed_git *p)
return (uint32_t)((p->index_size - 20 - 20 - 4*256) / 24);
}
-int nth_packed_object_sha1(const struct packed_git *p, uint32_t n,
- unsigned char* sha1)
+const unsigned char *nth_packed_object_sha1(const struct packed_git *p,
+ uint32_t n)
{
const unsigned char *index = p->index_data;
index += 4 * 256;
if (num_packed_objects(p) <= n)
- return -1;
- hashcpy(sha1, index + 24 * n + 4);
- return 0;
+ return NULL;
+ return index + 24 * n + 4;
}
off_t find_pack_entry_one(const unsigned char *sha1,
diff --git a/sha1_name.c b/sha1_name.c
index bede0e5..267ea3f 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -71,7 +71,7 @@ static int match_sha(unsigned len, const unsigned char *a, const unsigned char *
static int find_short_packed_object(int len, const unsigned char *match, unsigned char *sha1)
{
struct packed_git *p;
- unsigned char found_sha1[20];
+ const unsigned char *found_sha1 = NULL;
int found = 0;
prepare_packed_git();
@@ -80,10 +80,10 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne
uint32_t first = 0, last = num;
while (first < last) {
uint32_t mid = (first + last) / 2;
- unsigned char now[20];
+ const unsigned char *now;
int cmp;
- nth_packed_object_sha1(p, mid, now);
+ now = nth_packed_object_sha1(p, mid);
cmp = hashcmp(match, now);
if (!cmp) {
first = mid;
@@ -96,14 +96,14 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne
last = mid;
}
if (first < num) {
- unsigned char now[20], next[20];
- nth_packed_object_sha1(p, first, now);
+ const unsigned char *now, *next;
+ now = nth_packed_object_sha1(p, first);
if (match_sha(len, match, now)) {
- if (nth_packed_object_sha1(p, first+1, next) ||
- !match_sha(len, match, next)) {
+ next = nth_packed_object_sha1(p, first+1);
+ if (!next|| !match_sha(len, match, next)) {
/* unique within this pack */
if (!found) {
- hashcpy(found_sha1, now);
+ found_sha1 = now;
found++;
}
else if (hashcmp(found_sha1, now)) {
-
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