[PATCH] Object library enhancements
Add function to look up an object which is entirely unknown, so that
it can be put in a list. Various other functions related to lists of
objects.
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/object.c b/object.c
index c410e97..72f6aa5 100644
--- a/object.c
+++ b/object.c
@@ -99,7 +99,9 @@
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 @@
}
}
+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 @@
}
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;
+}
diff --git a/object.h b/object.h
index d82c7c4..5af530d 100644
--- a/object.h
+++ b/object.h
@@ -31,8 +31,18 @@
/** Returns the object, having parsed it to find out what it is. **/
struct object *parse_object(const unsigned char *sha1);
+/** Returns the object, with potentially excess memory allocated. **/
+struct object *lookup_unknown_object(const unsigned char *sha1);
+
void add_ref(struct object *refer, struct object *target);
void mark_reachable(struct object *obj, unsigned int mask);
+struct object_list *object_list_insert(struct object *item,
+ struct object_list **list_p);
+
+unsigned object_list_length(struct object_list *list);
+
+int object_list_contains(struct object_list *list, struct object *obj);
+
#endif /* OBJECT_H */
diff --git a/tree.h b/tree.h
index ae61bcc..0df065a 100644
--- a/tree.h
+++ b/tree.h
@@ -14,6 +14,7 @@
unsigned int mode;
char *name;
union {
+ struct object *any;
struct tree *tree;
struct blob *blob;
} item;
