forked from Rativel/BurritOS
66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
use std::{fs::File, io::{Seek, SeekFrom, Read}};
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use super::filesys;
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pub const TRANSFER_SIZE: usize = 10;
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/// copy the contents of the UNIX file "from" to the Nachos file "to"
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///
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/// `panic!` when the file from doesn't exist
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///
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/// - **from** file UNIX
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/// - **to** BurritOS file
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pub fn copy(from : &str, to : &str) {
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let file_from_opt = File::options().read(true).open(from);
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let mut file_from : File;
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match file_from_opt {
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Err(e) => {
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panic!("Copy: couldn't open Unix file {}", from);
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}
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Ok(f) => {
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file_from = f;
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}
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}
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let mut file_length_buf = [0; 1];
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file_from.seek(SeekFrom::End(2));
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file_from.read(&mut file_length_buf);
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file_from.seek(SeekFrom::Start(0));
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let file_length = file_length_buf[0];
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filesys::create(to, file_length);
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let open_file = filesys::open(to);
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let mut buffer = [0; TRANSFER_SIZE];
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loop {
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let amount_read = file_from.read(&mut buffer).expect("copy : couldn't read the UNIX file");
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open_file.write(&buffer[..amount_read]);
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if amount_read != TRANSFER_SIZE {
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break;
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}
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}
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}
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/// Print the contents of the Nachos file "name".
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///
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/// `panic!` when the file name doewn't exist
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///
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/// - **name** of the BurritOS file
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pub fn print(name : &str) {
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let open_file = filesys::open(name);
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let mut buffer = [0; TRANSFER_SIZE];
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loop {
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let amount_read = open_file.read(&mut buffer);
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for i in 0..amount_read {
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print!("{:1x} ", buffer[i]);
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}
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if amount_read != TRANSFER_SIZE {
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break;
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}
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}
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} |