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)
{
return br_available_bytes(br);
}
+/**
+ * \return zero if the input buffer queue is empty.
+ */
size_t btr_next_buffer(struct btr_node *btrn, char **bufp)
{
struct btr_buffer_reference *br;
assert(list_empty(&btrn->children));
free(btrn->name);
free(btrn);
- return 1;
}
/**
*
* This is a quite expensive operation.
*
- * \return The number of buffers that have been merged (zero, one or two).
+ * \return The number of buffers that have been available (zero, one or two).
*/
-int btr_merge(struct btr_node *btrn)
+static int merge_input(struct btr_node *btrn)
{
struct btr_buffer_reference *brs[2], *br;
char *bufs[2], *buf;
para_list_add(&br->node, &btrn->input_queue);
return 2;
}
+
+void btr_merge(struct btr_node *btrn, size_t dest_size)
+{
+ for (;;) {
+ char *buf;
+ size_t len = btr_next_buffer(btrn, &buf);
+ if (len >= dest_size)
+ return;
+ if (merge_input(btrn) < 2)
+ return;
+ }
+}
+
+bool btr_eof(struct btr_node *btrn)
+{
+ char *buf;
+ size_t len = btr_next_buffer(btrn, &buf);
+
+ 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);
+}