You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: u_signal_names.rs
    path of file: ./repos/rustybox/libbb
    
    the code of the file until where you have to start completion: use libc;
use libc::printf;
use libc::strcasecmp;
extern "C" {
  #[no_mangle]
  fn __libc_current_sigrtmin() -> libc::c_int;
  #[no_mangle]
  fn __libc_current_sigrtmax() -> libc::
    
pub unsafe fn get_signame(mut number: libc::c_int) -> *const libc::c_char {
  if (number as libc::c_uint)
    < (::std::mem::size_of::<[[libc::c_char; 7]; 32]>() as libc::c_ulong)
      .wrapping_div(::std::mem::size_of::<[libc::c_char; 7]>() as libc::c_ulong)
      as libc::c_uint
  {
    if signals[number as usize][0] != 0 {
      /* if it's not an empty str */
      return signals[number as usize].as_ptr();
    }
  }
  return crate::libbb::xfuncs::itoa(number);
}