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Diffstat (limited to 'name-hash.c')
-rw-r--r--name-hash.c72
1 files changed, 71 insertions, 1 deletions
diff --git a/name-hash.c b/name-hash.c
index 0031d78e8c..c6b6a3fe4c 100644
--- a/name-hash.c
+++ b/name-hash.c
@@ -32,6 +32,42 @@ static unsigned int hash_name(const char *name, int namelen)
return hash;
}
+static void hash_index_entry_directories(struct index_state *istate, struct cache_entry *ce)
+{
+ /*
+ * Throw each directory component in the hash for quick lookup
+ * during a git status. Directory components are stored with their
+ * closing slash. Despite submodules being a directory, they never
+ * reach this point, because they are stored without a closing slash
+ * in the cache.
+ *
+ * Note that the cache_entry stored with the directory does not
+ * represent the directory itself. It is a pointer to an existing
+ * filename, and its only purpose is to represent existence of the
+ * directory in the cache. It is very possible multiple directory
+ * hash entries may point to the same cache_entry.
+ */
+ unsigned int hash;
+ void **pos;
+
+ const char *ptr = ce->name;
+ while (*ptr) {
+ while (*ptr && *ptr != '/')
+ ++ptr;
+ if (*ptr == '/') {
+ ++ptr;
+ hash = hash_name(ce->name, ptr - ce->name);
+ if (!lookup_hash(hash, &istate->name_hash)) {
+ pos = insert_hash(hash, ce, &istate->name_hash);
+ if (pos) {
+ ce->next = *pos;
+ *pos = ce;
+ }
+ }
+ }
+ }
+}
+
static void hash_index_entry(struct index_state *istate, struct cache_entry *ce)
{
void **pos;
@@ -47,6 +83,9 @@ static void hash_index_entry(struct index_state *istate, struct cache_entry *ce)
ce->next = *pos;
*pos = ce;
}
+
+ if (ignore_case)
+ hash_index_entry_directories(istate, ce);
}
static void lazy_init_name_hash(struct index_state *istate)
@@ -97,7 +136,21 @@ static int same_name(const struct cache_entry *ce, const char *name, int namelen
if (len == namelen && !cache_name_compare(name, namelen, ce->name, len))
return 1;
- return icase && slow_same_name(name, namelen, ce->name, len);
+ if (!icase)
+ return 0;
+
+ /*
+ * If the entry we're comparing is a filename (no trailing slash), then compare
+ * the lengths exactly.
+ */
+ if (name[namelen - 1] != '/')
+ return slow_same_name(name, namelen, ce->name, len);
+
+ /*
+ * For a directory, we point to an arbitrary cache_entry filename. Just
+ * make sure the directory portion matches.
+ */
+ return slow_same_name(name, namelen, ce->name, namelen < len ? namelen : len);
}
struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int icase)
@@ -115,5 +168,22 @@ struct cache_entry *index_name_exists(struct index_state *istate, const char *na
}
ce = ce->next;
}
+
+ /*
+ * Might be a submodule. Despite submodules being directories,
+ * they are stored in the name hash without a closing slash.
+ * When ignore_case is 1, directories are stored in the name hash
+ * with their closing slash.
+ *
+ * The side effect of this storage technique is we have need to
+ * remove the slash from name and perform the lookup again without
+ * the slash. If a match is made, S_ISGITLINK(ce->mode) will be
+ * true.
+ */
+ if (icase && name[namelen - 1] == '/') {
+ ce = index_name_exists(istate, name, namelen - 1, icase);
+ if (ce && S_ISGITLINK(ce->ce_mode))
+ return ce;
+ }
return NULL;
}