(start_case_map): Ditto, and rename case_map_prepare_dict.
(finish_case_map): Ditto, and rename case_map_from_dict.
(map_case): Ditto, and rename case_map_execute.
(destroy_case_map): Ditto, and rename case_map_destroy.
(case_map_get_value_cnt): Ditto.
* automake.mk: Add case-map.c, case-map.h.
* case-map.c: New file.
* case-map.h: New file.