commit: factor out clear_commit_marks_for_object_array

Factor out the code to clear the commit marks for a whole struct
object_array from builtin/checkout.c into its own exported function
clear_commit_marks_for_object_array and use it in bisect and bundle
as well.  It handles tags and commits and ignores objects of any
other type.

Signed-off-by: Rene Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: René Scharfe

bisect.c

@@ -818,7 +818,7 @@ static int check_ancestors(const char *prefix)
 {
 	struct rev_info revs;
 	struct object_array pending_copy;
-	int i, res;
+	int res;
 
 	bisect_rev_setup(&revs, prefix, "^%s", "%s", 0);
 
@@ -835,10 +835,7 @@ static int check_ancestors(const char *prefix)
 	res = (revs.commits != NULL);
 
 	/* Clean up objects used, as they will be reused. */
-	for (i = 0; i < pending_copy.nr; i++) {
-		struct object *o = pending_copy.objects[i].item;
-		clear_commit_marks((struct commit *)o, ALL_REV_FLAGS);
-	}
+	clear_commit_marks_for_object_array(&pending_copy, ALL_REV_FLAGS);
 	free(pending_copy.objects);
 
 	return res;

builtin/checkout.c

@@ -663,7 +663,6 @@ static void orphaned_commit_warning(struct commit *commit)
 	struct rev_info revs;
 	struct object *object = &commit->object;
 	struct object_array refs;
-	unsigned int i;
 
 	init_revisions(&revs, NULL);
 	setup_revisions(0, NULL, &revs, NULL);
@@ -683,12 +682,7 @@ static void orphaned_commit_warning(struct commit *commit)
 	else
 		describe_detached_head(_("Previous HEAD position was"), commit);
 
-	for (i = 0; i < refs.nr; i++) {
-		struct object *o = refs.objects[i].item;
-		struct commit *c = lookup_commit_reference_gently(o->sha1, 1);
-		if (c)
-			clear_commit_marks(c, ALL_REV_FLAGS);
-	}
+	clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS);
 	free(refs.objects);
 }
 

bundle.c

@@ -141,8 +141,7 @@ int verify_bundle(struct bundle_header *header, int verbose)
 				refs.objects[i].name);
 		}
 
-	for (i = 0; i < refs.nr; i++)
-		clear_commit_marks((struct commit *)refs.objects[i].item, -1);
+	clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS);
 	free(refs.objects);
 
 	if (verbose) {

commit.c

@@ -440,6 +440,20 @@ void clear_commit_marks(struct commit *commit, unsigned int mark)
 	}
 }
 
+void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark)
+{
+	struct object *object;
+	struct commit *commit;
+	unsigned int i;
+
+	for (i = 0; i < a->nr; i++) {
+		object = a->objects[i].item;
+		commit = lookup_commit_reference_gently(object->sha1, 1);
+		if (commit)
+			clear_commit_marks(commit, mark);
+	}
+}
+
 struct commit *pop_commit(struct commit_list **stack)
 {
 	struct commit_list *top = *stack;

commit.h

@@ -126,6 +126,7 @@ struct commit *pop_most_recent_commit(struct commit_list **list,
 struct commit *pop_commit(struct commit_list **stack);
 
 void clear_commit_marks(struct commit *commit, unsigned int mark);
+void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark);
 
 /*
  * Performs an in-place topological sort of list supplied.