proof of concept, bytes showing and grouped

This commit is contained in:
alice pellerin
2025-11-18 16:27:56 -06:00
commit dfd10508fd
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+9
View File
@@ -0,0 +1,9 @@
[package]
name = "hexapoda"
version = "0.1.0"
edition = "2024"
[dependencies]
crossterm = "0.29.0"
itertools = "0.14.0"
ratatui = "0.29.0"
+182
View File
@@ -0,0 +1,182 @@
use std::{borrow::Cow, env, fs::File, io::Read, mem, process::exit};
use crossterm::event::{self, Event};
use itertools::Itertools;
use ratatui::{style::{Color, Style}, text::{Line, Span, Text}, widgets::Widget};
fn main() {
let mut app = App::init();
let mut terminal = ratatui::init();
while !app.should_quit {
terminal.draw(|frame| {
frame.render_widget(&app, frame.area())
}).unwrap();
app.handle_events();
}
ratatui::restore();
}
#[derive(Debug)]
struct App {
contents: Vec<u8>,
scroll_position: usize,
// cursor_position: usize,
should_quit: bool
}
impl App {
fn init() -> App {
let input_files: Vec<_> = env::args().skip(1).collect();
if input_files.is_empty() {
println!("please provide at least one file as input");
exit(1);
}
assert!(input_files.len() == 1);
let file_name = input_files.first().unwrap();
let file = File::open(file_name);
let mut contents = Vec::new();
file.unwrap().read_to_end(&mut contents).unwrap();
App {
contents,
scroll_position: 0,
// cursor_position: 0,
should_quit: false,
}
}
fn handle_events(&mut self) {
if matches!(event::read().unwrap(), Event::Key(_)) {
self.should_quit = true;
}
}
}
const BYTES_PER_LINE: usize = 0x10;
impl Widget for &App {
fn render(self, area: ratatui::prelude::Rect, buf: &mut ratatui::prelude::Buffer) {
let screen_end = self.scroll_position + BYTES_PER_LINE * (area.height as usize);
let bytes_to_render = &self.contents[self.scroll_position..screen_end];
let (chunks, remainder) = bytes_to_render
.as_chunks::<BYTES_PER_LINE>();
assert!(remainder.is_empty());
let lines: Vec<_> = chunks
.iter()
.map(render_line)
.collect();
let text = Text::from(lines);
text.render(area, buf);
}
}
fn render_line(bytes: &[u8; BYTES_PER_LINE]) -> Line {
let (chunks, remainder) = bytes.as_chunks::<BYTES_PER_CHUNK>();
assert!(remainder.is_empty());
#[allow(unstable_name_collisions)]
let spans: Vec<_> = chunks
.iter()
.map(render_chunk)
.intersperse(vec![" ".into()])
.flatten()
.collect();
Line::from(spans)
}
const BYTES_PER_CHUNK: usize = 4;
fn render_chunk(bytes: &[u8; BYTES_PER_CHUNK]) -> Vec<Span<'static>> {
#[allow(unstable_name_collisions)]
bytes
.iter()
.copied()
.map(byte_as_span)
.intersperse(" ".into())
.collect()
}
trait HasCardinality {
const CARDINALITY: usize;
}
impl HasCardinality for u8 {
const CARDINALITY: usize = 2usize.pow(u8::BITS);
}
fn byte_as_span(byte: u8) -> Span<'static> {
const SPAN_FOR_BYTE: [Span; u8::CARDINALITY] = create_lookup_table();
SPAN_FOR_BYTE[byte as usize].clone()
}
const fn create_lookup_table() -> [Span<'static>; u8::CARDINALITY] {
let mut result = [const { empty_span() }; u8::CARDINALITY];
let mut index = 0;
while index < u8::CARDINALITY {
result[index].style = style_for(index as u8);
mem::forget(mem::replace(&mut result[index].content, content_for(index as u8)));
index += 1;
}
result
}
const fn empty_span() -> Span<'static> {
Span {
style: Style::new(),
content: Cow::Borrowed("")
}
}
const fn style_for(byte: u8) -> Style {
Style::new().fg(fg_for(byte))
}
const fn fg_for(byte: u8) -> Color {
match byte {
0x00 => Color::Rgb(0xA0, 0xA0, 0xA0), // grey
0x01..0x10 => Color::Rgb(0xFF, 0x71, 0xA9), // red
0x10..0x20 => Color::Rgb(0xFF, 0x7A, 0x78), // salmon
0x20..0x30 => Color::Rgb(0xFF, 0x81, 0x23), // red-orange
0x30..0x40 => Color::Rgb(0xF7, 0x93, 0x00), // yellow-orange
0x40..0x50 => Color::Rgb(0xE6, 0x9F, 0x00), // yellow
0x50..0x60 => Color::Rgb(0xC1, 0xB2, 0x00), // green-yellow
0x60..0x70 => Color::Rgb(0x82, 0xC6, 0x00), // lime
0x70..0x80 => Color::Rgb(0x00, 0xD5, 0x00), // green
0x80..0x90 => Color::Rgb(0x00, 0xD4, 0x59), // clover
0x90..0xA0 => Color::Rgb(0x00, 0xD0, 0x91), // teal
0xA0..0xB0 => Color::Rgb(0x00, 0xCC, 0xBB), // cyan
0xB0..0xC0 => Color::Rgb(0x00, 0xC7, 0xDE), // light blue
0xC0..0xD0 => Color::Rgb(0x00, 0xBE, 0xFF), // blue
0xD0..0xE0 => Color::Rgb(0x6C, 0xAF, 0xFF), // blurple
0xE0..0xF0 => Color::Rgb(0xB2, 0x98, 0xFF), // purple
0xF0..0xFF => Color::Rgb(0xFF, 0x4D, 0xFF), // pink
0xFF => Color::White
}
}
const fn content_for(byte: u8) -> Cow<'static, str> {
Cow::Borrowed(byte_as_hex(byte))
}
const fn byte_as_hex(byte: u8) -> &'static str {
const LOOK_UP_TABLE: [&str; u8::CARDINALITY] = ["00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B", "1C", "1D", "1E", "1F", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", "3D", "3E", "3F", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4A", "4B", "4C", "4D", "4E", "4F", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", "5E", "5F", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6A", "6B", "6C", "6D", "6E", "6F", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E", "7F", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8A", "8B", "8C", "8D", "8E", "8F", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F", "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA", "AB", "AC", "AD", "AE", "AF", "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF", "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB", "CC", "CD", "CE", "CF", "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF", "E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC", "ED", "EE", "EF", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF"];
LOOK_UP_TABLE[byte as usize]
}