Function onig_search 

pub unsafe extern "C" fn onig_search(
    arg1: OnigRegex,
    str_: *const OnigUChar,
    end: *const OnigUChar,
    start: *const OnigUChar,
    range: *const OnigUChar,
    region: *mut OnigRegion,
    option: OnigOptionType,
) -> c_int