Remove TYPE_* constant macros and use object_type enums consistently.

This updates the type-enumeration constants introduced to reduce
the memory footprint of "struct object" to match the type bits
already used in the packfile format, by removing the former
(i.e. TYPE_* constant macros) and using the latter (i.e. enum
object_type) throughout the code for consistency.

Eventually we can stop passing around the "type strings"
entirely, and this will help - no confusion about two different
integer enumeration.

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

blob.c

@@ -10,12 +10,12 @@ struct blob *lookup_blob(const unsigned char *sha1)
 	if (!obj) {
 		struct blob *ret = alloc_blob_node();
 		created_object(sha1, &ret->object);
-		ret->object.type = TYPE_BLOB;
+		ret->object.type = OBJ_BLOB;
 		return ret;
 	}
 	if (!obj->type)
-		obj->type = TYPE_BLOB;
-	if (obj->type != TYPE_BLOB) {
+		obj->type = OBJ_BLOB;
+	if (obj->type != OBJ_BLOB) {
 		error("Object %s is a %s, not a blob",
 		      sha1_to_hex(sha1), typename(obj->type));
 		return NULL;

builtin-diff.c

@@ -285,9 +285,9 @@ int cmd_diff(int argc, const char **argv, char **envp)
 		obj = deref_tag(obj, NULL, 0);
 		if (!obj)
 			die("invalid object '%s' given.", name);
-		if (obj->type == TYPE_COMMIT)
+		if (obj->type == OBJ_COMMIT)
 			obj = &((struct commit *)obj)->tree->object;
-		if (obj->type == TYPE_TREE) {
+		if (obj->type == OBJ_TREE) {
 			if (ARRAY_SIZE(ent) <= ents)
 				die("more than %d trees given: '%s'",
 				    (int) ARRAY_SIZE(ent), name);
@@ -297,7 +297,7 @@ int cmd_diff(int argc, const char **argv, char **envp)
 			ents++;
 			continue;
 		}
-		if (obj->type == TYPE_BLOB) {
+		if (obj->type == OBJ_BLOB) {
 			if (2 <= blobs)
 				die("more than two blobs given: '%s'", name);
 			memcpy(blob[blobs].sha1, obj->sha1, 20);

builtin-fmt-merge-msg.c

@@ -181,7 +181,7 @@ static void shortlog(const char *name, unsigned char *sha1,
 	int flags = UNINTERESTING | TREECHANGE | SEEN | SHOWN | ADDED;
 
 	branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
-	if (!branch || branch->type != TYPE_COMMIT)
+	if (!branch || branch->type != OBJ_COMMIT)
 		return;
 
 	setup_revisions(0, NULL, rev, NULL);

builtin-grep.c

@@ -891,9 +891,9 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
 static int grep_object(struct grep_opt *opt, const char **paths,
 		       struct object *obj, const char *name)
 {
-	if (obj->type == TYPE_BLOB)
+	if (obj->type == OBJ_BLOB)
 		return grep_sha1(opt, obj->sha1, name);
-	if (obj->type == TYPE_COMMIT || obj->type == TYPE_TREE) {
+	if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
 		struct tree_desc tree;
 		void *data;
 		int hit;

builtin-rev-list.c

@@ -167,16 +167,16 @@ static void show_commit_list(struct rev_info *revs)
 		const char *name = pending->name;
 		if (obj->flags & (UNINTERESTING | SEEN))
 			continue;
-		if (obj->type == TYPE_TAG) {
+		if (obj->type == OBJ_TAG) {
 			obj->flags |= SEEN;
 			add_object_array(obj, name, &objects);
 			continue;
 		}
-		if (obj->type == TYPE_TREE) {
+		if (obj->type == OBJ_TREE) {
 			process_tree((struct tree *)obj, &objects, NULL, name);
 			continue;
 		}
-		if (obj->type == TYPE_BLOB) {
+		if (obj->type == OBJ_BLOB) {
 			process_blob((struct blob *)obj, &objects, NULL, name);
 			continue;
 		}

commit.c

@@ -56,7 +56,7 @@ static struct commit *check_commit(struct object *obj,
 				   const unsigned char *sha1,
 				   int quiet)
 {
-	if (obj->type != TYPE_COMMIT) {
+	if (obj->type != OBJ_COMMIT) {
 		if (!quiet)
 			error("Object %s is a %s, not a commit",
 			      sha1_to_hex(sha1), typename(obj->type));
@@ -86,11 +86,11 @@ struct commit *lookup_commit(const unsigned char *sha1)
 	if (!obj) {
 		struct commit *ret = alloc_commit_node();
 		created_object(sha1, &ret->object);
-		ret->object.type = TYPE_COMMIT;
+		ret->object.type = OBJ_COMMIT;
 		return ret;
 	}
 	if (!obj->type)
-		obj->type = TYPE_COMMIT;
+		obj->type = OBJ_COMMIT;
 	return check_commit(obj, sha1, 0);
 }
 

describe.c

@@ -67,7 +67,7 @@ static int get_name(const char *path, const unsigned char *sha1)
 	 * Otherwise only annotated tags are used.
 	 */
 	if (!strncmp(path, "refs/tags/", 10)) {
-		if (object->type == TYPE_TAG)
+		if (object->type == OBJ_TAG)
 			prio = 2;
 		else
 			prio = 1;

fetch-pack.c

@@ -46,7 +46,7 @@ static int rev_list_insert_ref(const char *path, const unsigned char *sha1)
 {
 	struct object *o = deref_tag(parse_object(sha1), path, 0);
 
-	if (o && o->type == TYPE_COMMIT)
+	if (o && o->type == OBJ_COMMIT)
 		rev_list_push((struct commit *)o, SEEN);
 
 	return 0;
@@ -256,14 +256,14 @@ static int mark_complete(const char *path, const unsigned char *sha1)
 {
 	struct object *o = parse_object(sha1);
 
-	while (o && o->type == TYPE_TAG) {
+	while (o && o->type == OBJ_TAG) {
 		struct tag *t = (struct tag *) o;
 		if (!t->tagged)
 			break; /* broken repository */
 		o->flags |= COMPLETE;
 		o = parse_object(t->tagged->sha1);
 	}
-	if (o && o->type == TYPE_COMMIT) {
+	if (o && o->type == OBJ_COMMIT) {
 		struct commit *commit = (struct commit *)o;
 		commit->object.flags |= COMPLETE;
 		insert_by_date(commit, &complete);
@@ -357,7 +357,7 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
 		 * in sync with the other side at some time after
 		 * that (it is OK if we guess wrong here).
 		 */
-		if (o->type == TYPE_COMMIT) {
+		if (o->type == OBJ_COMMIT) {
 			struct commit *commit = (struct commit *)o;
 			if (!cutoff || cutoff < commit->date)
 				cutoff = commit->date;
@@ -376,7 +376,7 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
 		struct object *o = deref_tag(lookup_object(ref->old_sha1),
 					     NULL, 0);
 
-		if (!o || o->type != TYPE_COMMIT || !(o->flags & COMPLETE))
+		if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
 			continue;
 
 		if (!(o->flags & SEEN)) {

fetch.c

@@ -118,20 +118,20 @@ static struct object_list **process_queue_end = &process_queue;
 
 static int process_object(struct object *obj)
 {
-	if (obj->type == TYPE_COMMIT) {
+	if (obj->type == OBJ_COMMIT) {
 		if (process_commit((struct commit *)obj))
 			return -1;
 		return 0;
 	}
-	if (obj->type == TYPE_TREE) {
+	if (obj->type == OBJ_TREE) {
 		if (process_tree((struct tree *)obj))
 			return -1;
 		return 0;
 	}
-	if (obj->type == TYPE_BLOB) {
+	if (obj->type == OBJ_BLOB) {
 		return 0;
 	}
-	if (obj->type == TYPE_TAG) {
+	if (obj->type == OBJ_TAG) {
 		if (process_tag((struct tag *)obj))
 			return -1;
 		return 0;

fsck-objects.c

@@ -297,13 +297,13 @@ static int fsck_sha1(unsigned char *sha1)
 	if (obj->flags & SEEN)
 		return 0;
 	obj->flags |= SEEN;
-	if (obj->type == TYPE_BLOB)
+	if (obj->type == OBJ_BLOB)
 		return 0;
-	if (obj->type == TYPE_TREE)
+	if (obj->type == OBJ_TREE)
 		return fsck_tree((struct tree *) obj);
-	if (obj->type == TYPE_COMMIT)
+	if (obj->type == OBJ_COMMIT)
 		return fsck_commit((struct commit *) obj);
-	if (obj->type == TYPE_TAG)
+	if (obj->type == OBJ_TAG)
 		return fsck_tag((struct tag *) obj);
 	/* By now, parse_object() would've returned NULL instead. */
 	return objerror(obj, "unknown type '%d' (internal fsck error)", obj->type);
@@ -472,7 +472,7 @@ static int fsck_cache_tree(struct cache_tree *it)
 		}
 		mark_reachable(obj, REACHABLE);
 		obj->used = 1;
-		if (obj->type != TYPE_TREE)
+		if (obj->type != OBJ_TREE)
 			err |= objerror(obj, "non-tree in cache-tree");
 	}
 	for (i = 0; i < it->subtree_nr; i++)

http-push.c

@@ -1784,16 +1784,16 @@ static int get_delta(struct rev_info *revs, struct remote_lock *lock)
 
 		if (obj->flags & (UNINTERESTING | SEEN))
 			continue;
-		if (obj->type == TYPE_TAG) {
+		if (obj->type == OBJ_TAG) {
 			obj->flags |= SEEN;
 			p = add_one_object(obj, p);
 			continue;
 		}
-		if (obj->type == TYPE_TREE) {
+		if (obj->type == OBJ_TREE) {
 			p = process_tree((struct tree *)obj, p, NULL, name);
 			continue;
 		}
-		if (obj->type == TYPE_BLOB) {
+		if (obj->type == OBJ_BLOB) {
 			p = process_blob((struct blob *)obj, p, NULL, name);
 			continue;
 		}
@@ -1960,12 +1960,12 @@ static int ref_newer(const unsigned char *new_sha1,
 	 * old.  Otherwise we require --force.
 	 */
 	o = deref_tag(parse_object(old_sha1), NULL, 0);
-	if (!o || o->type != TYPE_COMMIT)
+	if (!o || o->type != OBJ_COMMIT)
 		return 0;
 	old = (struct commit *) o;
 
 	o = deref_tag(parse_object(new_sha1), NULL, 0);
-	if (!o || o->type != TYPE_COMMIT)
+	if (!o || o->type != OBJ_COMMIT)
 		return 0;
 	new = (struct commit *) o;
 
@@ -2044,7 +2044,7 @@ static void add_remote_info_ref(struct remote_ls_ctx *ls)
 	fwrite_buffer(ref_info, 1, len, buf);
 	free(ref_info);
 
-	if (o->type == TYPE_TAG) {
+	if (o->type == OBJ_TAG) {
 		o = deref_tag(o, ls->dentry_name, 0);
 		if (o) {
 			len = strlen(ls->dentry_name) + 45;

name-rev.c

@@ -84,14 +84,14 @@ static int name_ref(const char *path, const unsigned char *sha1)
 	if (tags_only && strncmp(path, "refs/tags/", 10))
 		return 0;
 
-	while (o && o->type == TYPE_TAG) {
+	while (o && o->type == OBJ_TAG) {
 		struct tag *t = (struct tag *) o;
 		if (!t->tagged)
 			break; /* broken repository */
 		o = parse_object(t->tagged->sha1);
 		deref = 1;
 	}
-	if (o && o->type == TYPE_COMMIT) {
+	if (o && o->type == OBJ_COMMIT) {
 		struct commit *commit = (struct commit *)o;
 
 		if (!strncmp(path, "refs/heads/", 11))
@@ -111,7 +111,7 @@ static const char* get_rev_name(struct object *o)
 	struct rev_name *n;
 	struct commit *c;
 
-	if (o->type != TYPE_COMMIT)
+	if (o->type != OBJ_COMMIT)
 		return "undefined";
 	c = (struct commit *) o;
 	n = c->util;
@@ -172,7 +172,7 @@ int main(int argc, char **argv)
 		}
 
 		o = deref_tag(parse_object(sha1), *argv, 0);
-		if (!o || o->type != TYPE_COMMIT) {
+		if (!o || o->type != OBJ_COMMIT) {
 			fprintf(stderr, "Could not get commit for %s. Skipping.\n",
 					*argv);
 			continue;

object.c

@@ -19,7 +19,8 @@ struct object *get_indexed_object(unsigned int idx)
 }
 
 const char *type_names[] = {
-	"none", "blob", "tree", "commit", "bad"
+	"none", "commit", "tree", "blob", "tag",
+	"bad type 5", "bad type 6", "delta", "bad",
 };
 
 static unsigned int hash_obj(struct object *obj, unsigned int n)
@@ -88,7 +89,7 @@ void created_object(const unsigned char *sha1, struct object *obj)
 {
 	obj->parsed = 0;
 	obj->used = 0;
-	obj->type = TYPE_NONE;
+	obj->type = OBJ_NONE;
 	obj->flags = 0;
 	memcpy(obj->sha1, sha1, 20);
 
@@ -131,7 +132,7 @@ struct object *lookup_unknown_object(const unsigned char *sha1)
 	if (!obj) {
 		union any_object *ret = xcalloc(1, sizeof(*ret));
 		created_object(sha1, &ret->object);
-		ret->object.type = TYPE_NONE;
+		ret->object.type = OBJ_NONE;
 		return &ret->object;
 	}
 	return obj;

object.h

@@ -24,12 +24,19 @@ struct object_array {
 #define TYPE_BITS   3
 #define FLAG_BITS  27
 
-#define TYPE_NONE   0
-#define TYPE_BLOB   1
-#define TYPE_TREE   2
-#define TYPE_COMMIT 3
-#define TYPE_TAG    4
-#define TYPE_BAD    5
+/*
+ * The object type is stored in 3 bits.
+ */
+enum object_type {
+	OBJ_NONE = 0,
+	OBJ_COMMIT = 1,
+	OBJ_TREE = 2,
+	OBJ_BLOB = 3,
+	OBJ_TAG = 4,
+	/* 5/6 for future expansion */
+	OBJ_DELTA = 7,
+	OBJ_BAD,
+};
 
 struct object {
 	unsigned parsed : 1;
@@ -40,14 +47,14 @@ struct object {
 };
 
 extern int track_object_refs;
-extern const char *type_names[];
+extern const char *type_names[9];
 
 extern unsigned int get_max_object_index(void);
 extern struct object *get_indexed_object(unsigned int);
 
 static inline const char *typename(unsigned int type)
 {
-	return type_names[type > TYPE_TAG ? TYPE_BAD : type];
+	return type_names[type > OBJ_BAD ? OBJ_BAD : type];
 }
 
 extern struct object_refs *lookup_object_refs(struct object *);

pack.h

@@ -1,20 +1,7 @@
 #ifndef PACK_H
 #define PACK_H
 
-/*
- * The packed object type is stored in 3 bits.
- * The type value 0 is a reserved prefix if ever there is more than 7
- * object types, or any future format extensions.
- */
-enum object_type {
-	OBJ_EXT = 0,
-	OBJ_COMMIT = 1,
-	OBJ_TREE = 2,
-	OBJ_BLOB = 3,
-	OBJ_TAG = 4,
-	/* 5/6 for future expansion */
-	OBJ_DELTA = 7,
-};
+#include "object.h"
 
 /*
  * Packed object header