load_subtree(): fix incorrect comment
[gitweb.git] / notes.c
diff --git a/notes.c b/notes.c
index 8f47c202c58752b6d9d56852ae9c315e2f144769..d9f92d59f89392cd30cc2526c42e97eb675d9f09 100644 (file)
--- a/notes.c
+++ b/notes.c
@@ -64,7 +64,7 @@ struct non_note {
 #define CLR_PTR_TYPE(ptr)       ((void *) ((uintptr_t) (ptr) & ~3))
 #define SET_PTR_TYPE(ptr, type) ((void *) ((uintptr_t) (ptr) | (type)))
 
-#define GET_NIBBLE(n, sha1) (((sha1[(n) >> 1]) >> ((~(n) & 0x01) << 2)) & 0x0f)
+#define GET_NIBBLE(n, sha1) ((((sha1)[(n) >> 1]) >> ((~(n) & 0x01) << 2)) & 0x0f)
 
 #define KEY_INDEX (GIT_SHA1_RAWSZ - 1)
 #define FANOUT_PATH_SEPARATORS ((GIT_SHA1_HEXSZ / 2) - 1)
@@ -421,9 +421,6 @@ static void load_subtree(struct notes_tree *t, struct leaf_node *subtree,
        void *buf;
        struct tree_desc desc;
        struct name_entry entry;
-       int len, path_len;
-       unsigned char type;
-       struct leaf_node *l;
 
        buf = fill_tree_descriptor(&desc, subtree->val_oid.hash);
        if (!buf)
@@ -434,7 +431,10 @@ static void load_subtree(struct notes_tree *t, struct leaf_node *subtree,
        assert(prefix_len * 2 >= n);
        memcpy(object_oid.hash, subtree->key_oid.hash, prefix_len);
        while (tree_entry(&desc, &entry)) {
-               path_len = strlen(entry.path);
+               unsigned char type;
+               struct leaf_node *l;
+               int len, path_len = strlen(entry.path);
+
                len = get_oid_hex_segment(entry.path, path_len,
                                object_oid.hash + prefix_len, GIT_SHA1_RAWSZ - prefix_len);
                if (len < 0)
@@ -446,46 +446,35 @@ static void load_subtree(struct notes_tree *t, struct leaf_node *subtree,
                 * If object SHA1 is incomplete (len < 20), and current
                 * component consists of 2 hex chars, assume note subtree
                 */
-               if (len <= GIT_SHA1_RAWSZ) {
-                       type = PTR_TYPE_NOTE;
-                       l = (struct leaf_node *)
-                               xcalloc(1, sizeof(struct leaf_node));
-                       oidcpy(&l->key_oid, &object_oid);
-                       oidcpy(&l->val_oid, entry.oid);
-                       if (len < GIT_SHA1_RAWSZ) {
-                               if (!S_ISDIR(entry.mode) || path_len != 2)
-                                       goto handle_non_note; /* not subtree */
-                               l->key_oid.hash[KEY_INDEX] = (unsigned char) len;
-                               type = PTR_TYPE_SUBTREE;
-                       }
-                       if (note_tree_insert(t, node, n, l, type,
-                                            combine_notes_concatenate))
-                               die("Failed to load %s %s into notes tree "
-                                   "from %s",
-                                   type == PTR_TYPE_NOTE ? "note" : "subtree",
-                                   oid_to_hex(&l->key_oid), t->ref);
+               type = PTR_TYPE_NOTE;
+               l = (struct leaf_node *)
+                       xcalloc(1, sizeof(struct leaf_node));
+               oidcpy(&l->key_oid, &object_oid);
+               oidcpy(&l->val_oid, entry.oid);
+               if (len < GIT_SHA1_RAWSZ) {
+                       if (!S_ISDIR(entry.mode) || path_len != 2)
+                               goto handle_non_note; /* not subtree */
+                       l->key_oid.hash[KEY_INDEX] = (unsigned char) len;
+                       type = PTR_TYPE_SUBTREE;
                }
+               if (note_tree_insert(t, node, n, l, type,
+                                    combine_notes_concatenate))
+                       die("Failed to load %s %s into notes tree "
+                           "from %s",
+                           type == PTR_TYPE_NOTE ? "note" : "subtree",
+                           oid_to_hex(&l->key_oid), t->ref);
+
                continue;
 
 handle_non_note:
                /*
-                * Determine full path for this non-note entry:
-                * The filename is already found in entry.path, but the
-                * directory part of the path must be deduced from the subtree
-                * containing this entry. We assume here that the overall notes
-                * tree follows a strict byte-based progressive fanout
-                * structure (i.e. using 2/38, 2/2/36, etc. fanouts, and not
-                * e.g. 4/36 fanout). This means that if a non-note is found at
-                * path "dead/beef", the following code will register it as
-                * being found on "de/ad/beef".
-                * On the other hand, if you use such non-obvious non-note
-                * paths in the middle of a notes tree, you deserve what's
-                * coming to you ;). Note that for non-notes that are not
-                * SHA1-like at the top level, there will be no problems.
-                *
-                * To conclude, it is strongly advised to make sure non-notes
-                * have at least one non-hex character in the top-level path
-                * component.
+                * Determine full path for this non-note entry. The
+                * filename is already found in entry.path, but the
+                * directory part of the path must be deduced from the
+                * subtree containing this entry based on our
+                * knowledge that the overall notes tree follows a
+                * strict byte-based progressive fanout structure
+                * (i.e. using 2/38, 2/2/36, etc. fanouts).
                 */
                {
                        struct strbuf non_note_path = STRBUF_INIT;