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Made simpler, as padding tends to always be 0xFF and new size can be computed

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Isaac Shoebottom 2024-05-23 09:34:51 -03:00
parent 802c3e8c8a
commit 99aaad4200
3 changed files with 19 additions and 281 deletions
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246
Cargo.lock generated
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@ -2,252 +2,6 @@
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4
Cargo.toml
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@ -1,8 +1,6 @@
[package] [package]
name = "rom-untrim" name = "rom-untrim"
version = "0.1.0" version = "0.2.0"
edition = "2021" edition = "2021"
[dependencies] [dependencies]
unbytify = "0.2.0"
clap = { version = "4.5.4", features = ["derive"] }

50
src/main.rs
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@ -1,18 +1,5 @@
use std::fs::File; use std::fs::File;
use std::io::Write; use std::io::Write;
use clap::Parser;
use unbytify::unbytify;
#[derive(Parser, Debug)]
#[command(version, about, long_about = None)]
struct Args {
#[arg(short, long)]
filename: String,
#[arg(short, long)]
size: String,
#[arg(short, long)]
padding: String,
}
fn parse_filename(filename: &str) -> File { fn parse_filename(filename: &str) -> File {
let result = File::options().read(true).write(true).append(true).open(&filename); let result = File::options().read(true).write(true).append(true).open(&filename);
@ -25,37 +12,36 @@ fn parse_filename(filename: &str) -> File {
} }
} }
fn parse_size(size: &str) -> usize { fn parse_args(file_str: &Option<String>) -> &String {
let result = unbytify(size); match file_str {
match result { Some(file_str) => file_str,
Ok(size) => size as usize, None => {
Err(_) => { eprintln!("No file provided");
eprintln!("Invalid size: {}", size);
std::process::exit(1); std::process::exit(1);
} }
} }
} }
fn parse_padding(padding: &str) -> u8 { fn next_power_of_2(n: usize) -> usize {
let result = padding.parse::<u8>(); let mut size = 2usize;
match result { while size < n {
Ok(padding) => padding, size *= 2;
Err(_) => {
eprintln!("Invalid padding: {}", padding);
std::process::exit(1);
}
} }
size
} }
fn main() { fn main() {
let args = Args::parse(); let padding = 0xFF;
let mut file = parse_filename(&args.filename);
let new_size = parse_size(&args.size); let filename = std::env::args().nth(1);
let padding = parse_padding(&args.padding); let mut file = parse_filename(parse_args(&filename));
let current_size = file.metadata().unwrap().len() as usize; let current_size = file.metadata().unwrap().len() as usize;
println!("File: {}", args.filename); println!("File: {}", filename.unwrap());
println!("Current size: {}", current_size); println!("Current size: {}", current_size);
// Find next power of 2
let new_size = next_power_of_2(current_size);
println!("New size: {}", new_size); println!("New size: {}", new_size);
// if new size is bigger than current size, fill with padding until new size // if new size is bigger than current size, fill with padding until new size