67 lines
1.7 KiB
Rust
67 lines
1.7 KiB
Rust
use std::env;
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use std::io::prelude::*;
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use std::fs::File;
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const GLOBAL_BUFFER_LENGTH: usize = 16;
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fn get_file(filename: String) -> File {
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match File::open(filename) {
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Ok(f) => File::from(f),
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Err(e) => {
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panic!(e);
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}
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}
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}
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fn dump_to_hex(bytes: &mut [u8]) -> String {
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let out_vec: Vec<String> = bytes.chunks(2)
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.map(|c| {
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if c.len() == 2 { format!("{:02x}{:02x}", c[0], c[1]) }
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else { format!("{:02x}", c[0]) }
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}).collect();
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out_vec.join(" ")
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}
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fn dump_to_chr(bytes: &mut [u8]) -> String {
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let out_vec: Vec<String> = bytes.iter().map(|ord| {
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if *ord >= 32 && *ord <= 126 { (*ord as char).to_string() }
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else { '.'.to_string() }
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}).collect();
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out_vec.join("")
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}
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fn main() {
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let args: Vec<String> = env::args().collect();
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if args.len() < 2 {
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panic!("Not enough arguments!");
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}
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let filename = &args[1];
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let mut open_file = get_file(filename.to_string());
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let mut buf = [0; GLOBAL_BUFFER_LENGTH];
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let mut offset: usize = 0;
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loop {
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let bytes_read = open_file.read(&mut buf);
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match bytes_read {
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Ok(num) => {
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if num == 0 {
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break;
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} else {
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println!("{:08x}: {:40} {:10}",
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offset,
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dump_to_hex(&mut buf[0..num]),
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dump_to_chr(&mut buf[0..num]));
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offset += GLOBAL_BUFFER_LENGTH;
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}
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},
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Err(e) => {
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eprintln!("hd: {}", e);
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break;
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}
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}
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}
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}
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