Function getfov_c 

pub unsafe extern "C" fn getfov_c(
    instid: SpiceInt,
    room: SpiceInt,
    shapelen: SpiceInt,
    framelen: SpiceInt,
    shape: *mut SpiceChar,
    frame: *mut SpiceChar,
    bsight: *mut SpiceDouble,
    n: *mut SpiceInt,
    bounds: *mut [SpiceDouble; 3],
)