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Merge branch 'mh/iterate-refs'

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* mh/iterate-refs:
  refs.c: make create_cached_refs() static
  Retain caches of submodule refs
  Store the submodule name in struct cached_refs
  Allocate cached_refs objects dynamically
  Change the signature of read_packed_refs()
  Access reference caches only through new function get_cached_refs()
  Extract a function clear_cached_refs()
This commit is contained in:
Junio C Hamano 2011-10-10 15:56:18 -07:00
commit 11fa509957
1 changed files with 74 additions and 32 deletions
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106
refs.c
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@ -153,11 +153,15 @@ static struct ref_list *sort_ref_list(struct ref_list *list)
* when doing a full libification.
*/
static struct cached_refs {
struct cached_refs *next;
char did_loose;
char did_packed;
struct ref_list *loose;
struct ref_list *packed;
} cached_refs, submodule_refs;
/* The submodule name, or "" for the main repo. */
char name[FLEX_ARRAY];
} *cached_refs;
static struct ref_list *current_ref;
static struct ref_list *extra_refs;
@ -171,10 +175,8 @@ static void free_ref_list(struct ref_list *list)
}
}
static void invalidate_cached_refs(void)
static void clear_cached_refs(struct cached_refs *ca)
{
struct cached_refs *ca = &cached_refs;
if (ca->did_loose && ca->loose)
free_ref_list(ca->loose);
if (ca->did_packed && ca->packed)
@ -183,7 +185,54 @@ static void invalidate_cached_refs(void)
ca->did_loose = ca->did_packed = 0;
}
static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
static struct cached_refs *create_cached_refs(const char *submodule)
{
int len;
struct cached_refs *refs;
if (!submodule)
submodule = "";
len = strlen(submodule) + 1;
refs = xmalloc(sizeof(struct cached_refs) + len);
refs->next = NULL;
refs->did_loose = refs->did_packed = 0;
refs->loose = refs->packed = NULL;
memcpy(refs->name, submodule, len);
return refs;
}
/*
* Return a pointer to a cached_refs for the specified submodule. For
* the main repository, use submodule==NULL. The returned structure
* will be allocated and initialized but not necessarily populated; it
* should not be freed.
*/
static struct cached_refs *get_cached_refs(const char *submodule)
{
struct cached_refs *refs = cached_refs;
if (!submodule)
submodule = "";
while (refs) {
if (!strcmp(submodule, refs->name))
return refs;
refs = refs->next;
}
refs = create_cached_refs(submodule);
refs->next = cached_refs;
cached_refs = refs;
return refs;
}
static void invalidate_cached_refs(void)
{
struct cached_refs *refs = cached_refs;
while (refs) {
clear_cached_refs(refs);
refs = refs->next;
}
}
static struct ref_list *read_packed_refs(FILE *f)
{
struct ref_list *list = NULL;
struct ref_list *last = NULL;
@ -215,7 +264,7 @@ static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
!get_sha1_hex(refline + 1, sha1))
hashcpy(last->peeled, sha1);
}
cached_refs->packed = sort_ref_list(list);
return sort_ref_list(list);
}
void add_extra_ref(const char *name, const unsigned char *sha1, int flag)
@ -231,23 +280,20 @@ void clear_extra_refs(void)
static struct ref_list *get_packed_refs(const char *submodule)
{
const char *packed_refs_file;
struct cached_refs *refs;
struct cached_refs *refs = get_cached_refs(submodule);
if (submodule) {
packed_refs_file = git_path_submodule(submodule, "packed-refs");
refs = &submodule_refs;
free_ref_list(refs->packed);
} else {
packed_refs_file = git_path("packed-refs");
refs = &cached_refs;
}
if (!refs->did_packed) {
const char *packed_refs_file;
FILE *f;
if (!refs->did_packed || submodule) {
FILE *f = fopen(packed_refs_file, "r");
if (submodule)
packed_refs_file = git_path_submodule(submodule, "packed-refs");
else
packed_refs_file = git_path("packed-refs");
f = fopen(packed_refs_file, "r");
refs->packed = NULL;
if (f) {
read_packed_refs(f, refs);
refs->packed = read_packed_refs(f);
fclose(f);
}
refs->did_packed = 1;
@ -358,17 +404,13 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
static struct ref_list *get_loose_refs(const char *submodule)
{
if (submodule) {
free_ref_list(submodule_refs.loose);
submodule_refs.loose = get_ref_dir(submodule, "refs", NULL);
return submodule_refs.loose;
}
struct cached_refs *refs = get_cached_refs(submodule);
if (!cached_refs.did_loose) {
cached_refs.loose = get_ref_dir(NULL, "refs", NULL);
cached_refs.did_loose = 1;
if (!refs->did_loose) {
refs->loose = get_ref_dir(submodule, "refs", NULL);
refs->did_loose = 1;
}
return cached_refs.loose;
return refs->loose;
}
/* We allow "recursive" symbolic refs. Only within reason, though */
@ -378,7 +420,7 @@ static struct ref_list *get_loose_refs(const char *submodule)
static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
{
FILE *f;
struct cached_refs refs;
struct ref_list *packed_refs;
struct ref_list *ref;
int retval;
@ -386,9 +428,9 @@ static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refna
f = fopen(name, "r");
if (!f)
return -1;
read_packed_refs(f, &refs);
packed_refs = read_packed_refs(f);
fclose(f);
ref = refs.packed;
ref = packed_refs;
retval = -1;
while (ref) {
if (!strcmp(ref->name, refname)) {
@ -398,7 +440,7 @@ static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refna
}
ref = ref->next;
}
free_ref_list(refs.packed);
free_ref_list(packed_refs);
return retval;
}