tdb2: add lib/tdb2 (from CCAN init-1161-g661d41f)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/tdb2/test/layout.h b/lib/tdb2/test/layout.h
new file mode 100644
index 0000000000..6e2e6657a7
--- /dev/null
+++ b/lib/tdb2/test/layout.h
@@ -0,0 +1,68 @@
+#ifndef TDB2_TEST_LAYOUT_H
+#define TDB2_TEST_LAYOUT_H
+#include <ccan/tdb2/private.h>
+
+struct tdb_layout *new_tdb_layout(const char *filename);
+void tdb_layout_add_freetable(struct tdb_layout *layout);
+void tdb_layout_add_free(struct tdb_layout *layout, tdb_len_t len,
+			 unsigned ftable);
+void tdb_layout_add_used(struct tdb_layout *layout,
+			 TDB_DATA key, TDB_DATA data,
+			 tdb_len_t extra);
+#if 0 /* FIXME: Allow allocation of subtables */
+void tdb_layout_add_hashtable(struct tdb_layout *layout,
+			      int htable_parent, /* -1 == toplevel */
+			      unsigned int bucket,
+			      tdb_len_t extra);
+#endif
+struct tdb_context *tdb_layout_get(struct tdb_layout *layout);
+void tdb_layout_free(struct tdb_layout *layout);
+
+enum layout_type {
+	FREETABLE, FREE, DATA, HASHTABLE,
+};
+
+/* Shared by all union members. */
+struct tle_base {
+	enum layout_type type;
+	tdb_off_t off;
+};
+
+struct tle_freetable {
+	struct tle_base base;
+};
+
+struct tle_free {
+	struct tle_base base;
+	tdb_len_t len;
+	unsigned ftable_num;
+};
+
+struct tle_used {
+	struct tle_base base;
+	TDB_DATA key;
+	TDB_DATA data;
+	tdb_len_t extra;
+};
+
+struct tle_hashtable {
+	struct tle_base base;
+	int parent;
+	unsigned int bucket;
+	tdb_len_t extra;
+};
+
+union tdb_layout_elem {
+	struct tle_base base;
+	struct tle_freetable ftable;
+	struct tle_free free;
+	struct tle_used used;
+	struct tle_hashtable hashtable;
+};
+
+struct tdb_layout {
+	const char *filename;
+	unsigned int num_elems;
+	union tdb_layout_elem *elem;
+};
+#endif /* TDB2_TEST_LAYOUT_H */