dir->sorted = dir->nr = i;
}
+enum prefix_state {
+ /* All refs within the directory would match prefix: */
+ PREFIX_CONTAINS_DIR,
+
+ /* Some, but not all, refs within the directory might match prefix: */
+ PREFIX_WITHIN_DIR,
+
+ /* No refs within the directory could possibly match prefix: */
+ PREFIX_EXCLUDES_DIR
+};
+
/*
- * Load all of the refs from `dir` (recursively) into our in-memory
- * cache.
+ * Return a `prefix_state` constant describing the relationship
+ * between the directory with the specified `dirname` and `prefix`.
*/
-static void prime_ref_dir(struct ref_dir *dir)
+static enum prefix_state overlaps_prefix(const char *dirname,
+ const char *prefix)
+{
+ while (*prefix && *dirname == *prefix) {
+ dirname++;
+ prefix++;
+ }
+ if (!*prefix)
+ return PREFIX_CONTAINS_DIR;
+ else if (!*dirname)
+ return PREFIX_WITHIN_DIR;
+ else
+ return PREFIX_EXCLUDES_DIR;
+}
+
+/*
+ * Load all of the refs from `dir` (recursively) that could possibly
+ * contain references matching `prefix` into our in-memory cache. If
+ * `prefix` is NULL, prime unconditionally.
+ */
+static void prime_ref_dir(struct ref_dir *dir, const char *prefix)
{
/*
* The hard work of loading loose refs is done by get_ref_dir(), so we
int i;
for (i = 0; i < dir->nr; i++) {
struct ref_entry *entry = dir->entries[i];
- if (entry->flag & REF_DIR)
- prime_ref_dir(get_ref_dir(entry));
+ if (!(entry->flag & REF_DIR)) {
+ /* Not a directory; no need to recurse. */
+ } else if (!prefix) {
+ /* Recurse in any case: */
+ prime_ref_dir(get_ref_dir(entry), NULL);
+ } else {
+ switch (overlaps_prefix(entry->name, prefix)) {
+ case PREFIX_CONTAINS_DIR:
+ /*
+ * Recurse, and from here down we
+ * don't have to check the prefix
+ * anymore:
+ */
+ prime_ref_dir(get_ref_dir(entry), NULL);
+ break;
+ case PREFIX_WITHIN_DIR:
+ prime_ref_dir(get_ref_dir(entry), prefix);
+ break;
+ case PREFIX_EXCLUDES_DIR:
+ /* No need to prime this directory. */
+ break;
+ }
+ }
}
}
*/
struct ref_dir *dir;
+ enum prefix_state prefix_state;
+
/*
* The index of the current entry within dir (which might
* itself be a directory). If index == -1, then the iteration
/* The number of levels that have been allocated on the stack */
size_t levels_alloc;
+ /*
+ * Only include references with this prefix in the iteration.
+ * The prefix is matched textually, without regard for path
+ * component boundaries.
+ */
+ const char *prefix;
+
/*
* A stack of levels. levels[0] is the uppermost level that is
* being iterated over in this iteration. (This is not
&iter->levels[iter->levels_nr - 1];
struct ref_dir *dir = level->dir;
struct ref_entry *entry;
+ enum prefix_state entry_prefix_state;
if (level->index == -1)
sort_ref_dir(dir);
entry = dir->entries[level->index];
+ if (level->prefix_state == PREFIX_WITHIN_DIR) {
+ entry_prefix_state = overlaps_prefix(entry->name, iter->prefix);
+ if (entry_prefix_state == PREFIX_EXCLUDES_DIR)
+ continue;
+ } else {
+ entry_prefix_state = level->prefix_state;
+ }
+
if (entry->flag & REF_DIR) {
/* push down a level */
ALLOC_GROW(iter->levels, iter->levels_nr + 1,
level = &iter->levels[iter->levels_nr++];
level->dir = get_ref_dir(entry);
+ level->prefix_state = entry_prefix_state;
level->index = -1;
} else {
iter->base.refname = entry->name;
struct cache_ref_iterator *iter =
(struct cache_ref_iterator *)ref_iterator;
+ free((char *)iter->prefix);
free(iter->levels);
base_ref_iterator_free(ref_iterator);
return ITER_DONE;
dir = find_containing_dir(dir, prefix, 0);
if (!dir)
/* There's nothing to iterate over. */
- return empty_ref_iterator_begin();
+ return empty_ref_iterator_begin();
if (prime_dir)
- prime_ref_dir(dir);
+ prime_ref_dir(dir, prefix);
iter = xcalloc(1, sizeof(*iter));
ref_iterator = &iter->base;
level->index = -1;
level->dir = dir;
- if (prefix && *prefix)
- ref_iterator = prefix_ref_iterator_begin(ref_iterator,
- prefix, 0);
+ if (prefix && *prefix) {
+ iter->prefix = xstrdup(prefix);
+ level->prefix_state = PREFIX_WITHIN_DIR;
+ } else {
+ level->prefix_state = PREFIX_CONTAINS_DIR;
+ }
return ref_iterator;
}