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authorJunio C Hamano <junkio@cox.net>2005-06-28 21:56:57 (GMT)
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-28 22:16:25 (GMT)
commit9a217f2a725b085982e57b2a900d46128713cb27 (patch)
tree7a8e6944274ba9653b56e523aa6c5b185e46f051 /sha1_file.c
parentd22b9290ab6de119d03154844910ae5d963b5f1f (diff)
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[PATCH] Expose packed_git and alt_odb.
The commands git-fsck-cache and probably git-*-pull needs to have a way to enumerate objects contained in packed GIT archives and alternate object pools. This commit exposes the data structure used to keep track of them from sha1_file.c, and adds a couple of accessor interface functions for use by the enhanced git-fsck-cache command. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'sha1_file.c')
-rw-r--r--sha1_file.c43
1 files changed, 24 insertions, 19 deletions
diff --git a/sha1_file.c b/sha1_file.c
index e27affb..1754606 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -184,10 +184,7 @@ char *sha1_file_name(const unsigned char *sha1)
return base;
}
-static struct alternate_object_database {
- char *base;
- char *name;
-} *alt_odb;
+struct alternate_object_database *alt_odb;
/*
* Prepare alternate object database registry.
@@ -205,13 +202,15 @@ static struct alternate_object_database {
* pointed by base fields of the array elements with one xmalloc();
* the string pool immediately follows the array.
*/
-static void prepare_alt_odb(void)
+void prepare_alt_odb(void)
{
int pass, totlen, i;
const char *cp, *last;
char *op = NULL;
const char *alt = gitenv(ALTERNATE_DB_ENVIRONMENT) ? : "";
+ if (alt_odb)
+ return;
/* The first pass counts how large an area to allocate to
* hold the entire alt_odb structure, including array of
* structs and path buffers for them. The second pass fills
@@ -258,8 +257,7 @@ static char *find_sha1_file(const unsigned char *sha1, struct stat *st)
if (!stat(name, st))
return name;
- if (!alt_odb)
- prepare_alt_odb();
+ prepare_alt_odb();
for (i = 0; (name = alt_odb[i].name) != NULL; i++) {
fill_sha1_path(name, sha1);
if (!stat(alt_odb[i].base, st))
@@ -271,15 +269,7 @@ static char *find_sha1_file(const unsigned char *sha1, struct stat *st)
#define PACK_MAX_SZ (1<<26)
static int pack_used_ctr;
static unsigned long pack_mapped;
-static struct packed_git {
- struct packed_git *next;
- unsigned long index_size;
- unsigned long pack_size;
- unsigned int *index_base;
- void *pack_base;
- unsigned int pack_last_used;
- char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */
-} *packed_git;
+struct packed_git *packed_git;
struct pack_entry {
unsigned int offset;
@@ -429,7 +419,7 @@ static void prepare_packed_git_one(char *objdir)
}
}
-static void prepare_packed_git(void)
+void prepare_packed_git(void)
{
int i;
static int run_once = 0;
@@ -438,8 +428,7 @@ static void prepare_packed_git(void)
return;
prepare_packed_git_one(get_object_directory());
- if (!alt_odb)
- prepare_alt_odb();
+ prepare_alt_odb();
for (i = 0; alt_odb[i].base != NULL; i++) {
alt_odb[i].name[0] = 0;
prepare_packed_git_one(alt_odb[i].base);
@@ -820,6 +809,22 @@ static void *unpack_entry(struct pack_entry *entry,
return unpack_non_delta_entry(pack+5, size, left);
}
+int num_packed_objects(const struct packed_git *p)
+{
+ /* See check_packed_git_idx and pack-objects.c */
+ return (p->index_size - 20 - 20 - 4*256) / 24;
+}
+
+int nth_packed_object_sha1(const struct packed_git *p, int n,
+ unsigned char* sha1)
+{
+ void *index = p->index_base + 256;
+ if (n < 0 || num_packed_objects(p) <= n)
+ return -1;
+ memcpy(sha1, (index + 24 * n + 4), 20);
+ return 0;
+}
+
static int find_pack_entry_1(const unsigned char *sha1,
struct pack_entry *e, struct packed_git *p)
{