X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=buffer_tree.c;h=c826e8fa26a97c9036595ddf188bb984a7b4ec4e;hb=03683166610b241183b3cdb311069c96144fa53e;hp=cd3a3c78a45db3babb73c34a3b860b55c2d99bd7;hpb=81f6ec36f467795d7f17fcc669395f8a5d1223bb;p=paraslash.git

diff --git a/buffer_tree.c b/buffer_tree.c
index cd3a3c78..c826e8fa 100644
--- a/buffer_tree.c
+++ b/buffer_tree.c
@@ -119,6 +119,11 @@ void btr_add_output(char *buf, size_t size, struct btr_node *btrn)
 {
 	struct btr_buffer *btrb;
 
+	assert(size != 0);
+	if (list_empty(&btrn->children)) {
+		free(buf);
+		return;
+	}
 	btrb = new_btrb(buf, size);
 	add_btrb_to_children(btrb, btrn, 0);
 }
@@ -137,6 +142,17 @@ void btr_pushdown(struct btr_node *btrn)
 		btr_pushdown_br(br, btrn);
 }
 
+int btr_pushdown_one(struct btr_node *btrn)
+{
+	struct btr_buffer_reference *br;
+
+	if (list_empty(&btrn->input_queue))
+		return 0;
+	br = list_first_entry(&btrn->input_queue, struct btr_buffer_reference, node);
+	btr_pushdown_br(br, btrn);
+	return 1;
+}
+
 /* Return true if this node has no children. */
 bool btr_no_children(struct btr_node *btrn)
 {
@@ -371,3 +387,20 @@ bool btr_eof(struct btr_node *btrn)
 
 	return (len == 0 && btr_no_parent(btrn));
 }
+
+void log_tree_recursively(struct btr_node *btrn, int loglevel, int depth)
+{
+	struct btr_node *ch;
+	const char spaces[] = "                 ", *space = spaces + 16 - depth;
+
+	if (depth > 16)
+		return;
+	para_log(loglevel, "%s%s\n", space, btrn->name);
+	FOR_EACH_CHILD(ch, btrn)
+		log_tree_recursively(ch, loglevel, depth + 1);
+}
+
+void btr_log_tree(struct btr_node *btrn, int loglevel)
+{
+	return log_tree_recursively(btrn, loglevel, 0);
+}