git-send-pack: documentation

diff --git a/object.c b/object.c
index c410e97c8f378bd6c680efa48c82c3d3f7907103..72f6aa552f79edcd5f4f5c4a647ab62503365b1b 100644 (file)
--- a/object.c
+++ b/object.c
@@ -99,7 +99,9 @@ void mark_reachable(struct object *obj, unsigned int mask)
 
 struct object *lookup_object_type(const unsigned char *sha1, const char *type)
 {
-       if (!strcmp(type, blob_type)) {
+       if (!type) {
+               return lookup_unknown_object(sha1);
+       } else if (!strcmp(type, blob_type)) {
                return &lookup_blob(sha1)->object;
        } else if (!strcmp(type, tree_type)) {
                return &lookup_tree(sha1)->object;
@@ -113,6 +115,27 @@ struct object *lookup_object_type(const unsigned char *sha1, const char *type)
        }
 }
 
+union any_object {
+       struct object object;
+       struct commit commit;
+       struct tree tree;
+       struct blob blob;
+       struct tag tag;
+};
+
+struct object *lookup_unknown_object(const unsigned char *sha1)
+{
+       struct object *obj = lookup_object(sha1);
+       if (!obj) {
+               union any_object *ret = xmalloc(sizeof(*ret));
+               memset(ret, 0, sizeof(*ret));
+               created_object(sha1, &ret->object);
+               ret->object.type = NULL;
+               return &ret->object;
+       }
+       return obj;
+}
+
 struct object *parse_object(const unsigned char *sha1)
 {
        unsigned long size;
@@ -150,3 +173,33 @@ struct object *parse_object(const unsigned char *sha1)
        }
        return NULL;
 }
+
+struct object_list *object_list_insert(struct object *item,
+                                      struct object_list **list_p)
+{
+       struct object_list *new_list = xmalloc(sizeof(struct object_list));
+        new_list->item = item;
+        new_list->next = *list_p;
+        *list_p = new_list;
+        return new_list;
+}
+
+unsigned object_list_length(struct object_list *list)
+{
+       unsigned ret = 0;
+       while (list) {
+               list = list->next;
+               ret++;
+       }
+       return ret;
+}
+
+int object_list_contains(struct object_list *list, struct object *obj)
+{
+       while (list) {
+               if (list->item == obj)
+                       return 1;
+               list = list->next;
+       }
+       return 0;
+}