Clean up object creation to use more common code

This replaces the fairly odd "created_object()" function that did _most_
of the object setup with a more complete "create_object()" function that
also has a more natural calling convention.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

alloc.c

@@ -20,7 +20,7 @@
 
 #define DEFINE_ALLOCATOR(name, type)				\
 static unsigned int name##_allocs;				\
-struct name *alloc_##name##_node(void)				\
+void *alloc_##name##_node(void)					\
 {								\
 	static int nr;						\
 	static type *block;					\

blob.c

@@ -6,12 +6,8 @@ const char *blob_type = "blob";
 struct blob *lookup_blob(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
-	if (!obj) {
-		struct blob *ret = alloc_blob_node();
-		created_object(sha1, &ret->object);
-		ret->object.type = OBJ_BLOB;
-		return ret;
-	}
+	if (!obj)
+		return create_object(sha1, OBJ_BLOB, alloc_blob_node());
 	if (!obj->type)
 		obj->type = OBJ_BLOB;
 	if (obj->type != OBJ_BLOB) {

cache.h

@@ -476,15 +476,11 @@ int decode_85(char *dst, const char *line, int linelen);
 void encode_85(char *buf, const unsigned char *data, int bytes);
 
 /* alloc.c */
-struct blob;
-struct tree;
-struct commit;
-struct tag;
-extern struct blob *alloc_blob_node(void);
-extern struct tree *alloc_tree_node(void);
-extern struct commit *alloc_commit_node(void);
-extern struct tag *alloc_tag_node(void);
-extern struct object *alloc_object_node(void);
+extern void *alloc_blob_node(void);
+extern void *alloc_tree_node(void);
+extern void *alloc_commit_node(void);
+extern void *alloc_tag_node(void);
+extern void *alloc_object_node(void);
 extern void alloc_report(void);
 
 /* trace.c */

commit.c

@@ -98,12 +98,8 @@ struct commit *lookup_commit_reference(const unsigned char *sha1)
 struct commit *lookup_commit(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
-	if (!obj) {
-		struct commit *ret = alloc_commit_node();
-		created_object(sha1, &ret->object);
-		ret->object.type = OBJ_COMMIT;
-		return ret;
-	}
+	if (!obj)
+		return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
 	if (!obj->type)
 		obj->type = OBJ_COMMIT;
 	return check_commit(obj, sha1, 0);

object.c

@@ -105,11 +105,13 @@ static void grow_object_hash(void)
 	obj_hash_size = new_hash_size;
 }
 
-void created_object(const unsigned char *sha1, struct object *obj)
+void *create_object(const unsigned char *sha1, int type, void *o)
 {
+	struct object *obj = o;
+
 	obj->parsed = 0;
 	obj->used = 0;
-	obj->type = OBJ_NONE;
+	obj->type = type;
 	obj->flags = 0;
 	hashcpy(obj->sha1, sha1);
 
@@ -118,16 +120,14 @@ void created_object(const unsigned char *sha1, struct object *obj)
 
 	insert_obj_hash(obj, obj_hash, obj_hash_size);
 	nr_objs++;
+	return obj;
 }
 
 struct object *lookup_unknown_object(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
-	if (!obj) {
-		obj = alloc_object_node();
-		created_object(sha1, obj);
-		obj->type = OBJ_NONE;
-	}
+	if (!obj)
+		obj = create_object(sha1, OBJ_NONE, alloc_object_node());
 	return obj;
 }
 

object.h

@@ -46,7 +46,7 @@ extern struct object_refs *lookup_object_refs(struct object *);
 /** Internal only **/
 struct object *lookup_object(const unsigned char *sha1);
 
-void created_object(const unsigned char *sha1, struct object *obj);
+extern void *create_object(const unsigned char *sha1, int type, void *obj);
 
 /** Returns the object, having parsed it to find out what it is. **/
 struct object *parse_object(const unsigned char *sha1);

tag.c

@@ -20,13 +20,9 @@ struct object *deref_tag(struct object *o, const char *warn, int warnlen)
 
 struct tag *lookup_tag(const unsigned char *sha1)
 {
-        struct object *obj = lookup_object(sha1);
-        if (!obj) {
-                struct tag *ret = alloc_tag_node();
-                created_object(sha1, &ret->object);
-                ret->object.type = OBJ_TAG;
-                return ret;
-        }
+	struct object *obj = lookup_object(sha1);
+	if (!obj)
+		return create_object(sha1, OBJ_TAG, alloc_tag_node());
 	if (!obj->type)
 		obj->type = OBJ_TAG;
         if (obj->type != OBJ_TAG) {

tree.c

@@ -127,12 +127,8 @@ int read_tree(struct tree *tree, int stage, const char **match)
 struct tree *lookup_tree(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
-	if (!obj) {
-		struct tree *ret = alloc_tree_node();
-		created_object(sha1, &ret->object);
-		ret->object.type = OBJ_TREE;
-		return ret;
-	}
+	if (!obj)
+		return create_object(sha1, OBJ_TREE, alloc_tree_node());
 	if (!obj->type)
 		obj->type = OBJ_TREE;
 	if (obj->type != OBJ_TREE) {