Here are the data structures with brief descriptions:

Cdrill_list
Cerror_list
Cgerbv_drill_stats_t
Cgerbv_fileinfo_t
Cgerbv_format
Cgerbv_image_info
Cgerbv_image_t
Cgerbv_layer_color
Cgerbv_layer_t
Cgerbv_net
Cgerbv_netstate_t
Cgerbv_project_t
Cgerbv_render_info_t
Cgerbv_render_size_t
Cgerbv_selection_info_t
Cgerbv_stats_t
Cgerbv_user_transformation_t