66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
mod colormap;
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use std::env;
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use std::fs::File;
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use std::io::{self, Read};
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use colormap::{map_char_to_color, map_u8_to_color};
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const GLOBAL_BUFFER_LENGTH: usize = 16;
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fn dump_to_hex(bytes: &mut [u8]) -> String {
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let out_vec: Vec<String> = bytes
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.chunks(2)
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.map(|c| {
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if c.len() == 2 {
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format!("{}{}", map_u8_to_color(c[0]), map_u8_to_color(c[1]))
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} else {
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map_u8_to_color(c[0])
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}
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})
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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| map_char_to_color(*ord)).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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let mut reader: Box<dyn io::Read> = if args.len() == 1 {
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Box::new(io::stdin())
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} else {
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let filename = &args[1];
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Box::new(File::open(filename).expect("Could not open file."))
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};
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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 = reader.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!(
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"{: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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);
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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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