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: fd_pread.rs
    path of file: ./repos/wasmer/tests/wasi-wast/wasi/tests
    
    the code of the file until where you have to start completion: // WASI:
// dir: test_fs

use std::fs;
#[cfg(target_os = "wasi")]
use std::os::wasi::prelude::AsRawFd;
use std::path::PathBuf;

#[cfg(target_os = "wasi")]
#[repr(C)]
struct WasiIovec {
    pub buf: u32,
    pub buf_len: u32,
}

#[cfg(target_os = "wasi")]
#[link(wasm_import_module = "wasi_unstable")]
extern "C" {
    fn fd_pread(fd: u32, iovs: u32, iovs_len: u32, offset: u64, nread: u32) -> u16;
}

#[cfg(target_os = "wasi")]
fn pread(fd: u32, iovs: &[&mut [u8]], offset: u64) -> u32 {
    let mut nread = 0;
    let mut processed_iovs = vec![];

    for iov in iovs {
        processed_iovs.push(WasiIovec {
            buf: iov.as_ptr() as usize as u32,
            buf_len: iov.len() as u32,
        })
    }

    unsafe {
        fd_pread(
            fd,
            processed_iovs.as_ptr() as us
    
fn main() {
    let mut base = PathBuf::from("test_fs/hamlet");

    base.push("act3/scene4.txt");
    let mut file = fs::File::open(&base).expect("Could not open file");
    let mut buffer = [0u8; 64];

    #[cfg(target_os = "wasi")]
    {
        let raw_fd = file.as_raw_fd();
        assert_eq!(pread(raw_fd, &[&mut buffer], 75), 64);
        let str_val = std::str::from_utf8(&buffer[..]).unwrap().to_string();
        println!("{}", &str_val);
        for i in 0..buffer.len() {
            buffer[i] = 0;
        }
        assert_eq!(pread(raw_fd, &[&mut buffer], 75), 64);
        let str_val2 = std::str::from_utf8(&buffer[..]).unwrap().to_string();
        println!("{}", &str_val2);

        println!("Read the same data? {}", str_val == str_val2);
    }

    #[cfg(not(target_os = "wasi"))]
    {
        // eh, just print the output directly
        println!(
            " POLONIUS

    He will come straight. Look you lay home to him:

 POLONIUS

    He will come straight. Look you lay home to him:

Read the same data? true"
        );
    }
}