1 files changed, 48 insertions, 0 deletions
diff --git a/src/cells/heavy_keeper.h b/src/cells/heavy_keeper.h
new file mode 100644
index 0000000..3b09598
--- /dev/null
+++ b/src/cells/heavy_keeper.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+#include "exdata.h"
+
+
+struct heavy_keeper;
+
+struct heavy_keeper *heavy_keeper_new(int max_query_num);
+/**
+ * @brief   free a heavy keeper.
+ * @param   hk            the pointer to the heavy keeper.
+ */
+void heavy_keeper_free(struct heavy_keeper *hk);
+
+/*
+ * @brief   clear a heavy keeper. It will clear all the data in the heavy keeper. as for every exdata, use the reset function `exdata_reset_cb` to reset it.
+    * @param   hk            the pointer to the heavy keeper.
+*/
+void heavy_keeper_reset(struct heavy_keeper *hk);
+
+int heavy_keeper_add(struct heavy_keeper *hk, const char *key, size_t key_len, long long count, void *arg);
+
+int heavy_keeper_set_exdata_schema(struct heavy_keeper *hk, exdata_new_cb new_fn, exdata_free_cb free_fn, exdata_merge_cb merge_fn, exdata_reset_cb reset_fn, exdata_copy_cb copy_fn);
+
+void *heavy_keeper_get0_exdata(const struct heavy_keeper *hk, const char *key, size_t key_len);
+
+// get the number of cells in the heavy keeper
+int heavy_keeper_get_count(const struct heavy_keeper *hk);
+
+size_t heavy_keeper_list(const struct heavy_keeper *hk, void **exdatas, size_t n_exdatas);
+
+void heavy_keeper_merge(struct heavy_keeper *dest, const struct heavy_keeper *src);
+
+struct heavy_keeper *heavy_keeper_copy(const struct heavy_keeper *src);
+
+// for test
+void heavy_keeper_one_point_query(const struct heavy_keeper *hk, const char *key, size_t key_len, long long *count_out, void **exdata_out);
+
+
+#ifdef __cplusplus
+}
+#endif
+\ No newline at end of file