Here are the data structures with brief descriptions:

drill_list
error_list
gerbv_drill_stats_t
gerbv_fileinfo_t
gerbv_format
gerbv_image_info
gerbv_image_t
gerbv_layer_color
gerbv_layer_t
gerbv_net
gerbv_netstate_t
gerbv_project_t
gerbv_render_info_t
gerbv_render_size_t
gerbv_selection_info_t
gerbv_stats_t
gerbv_user_transformation_t