IsaacShoebottom/rom-untrim
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Initial release

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Isaac Shoebottom 2024-05-15 19:59:38 -03:00
commit dca4e60de4
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.gitignore vendored Normal file
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/target

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# Default ignored files
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.idea/modules.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
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.idea/rom-untrim.iml Normal file
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8
Cargo.toml Normal file
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[package]
name = "rom-untrim"
version = "0.1.0"
edition = "2021"
[dependencies]
unbytify = "0.2.0"
clap = { version = "4.5.4", features = ["derive"] }

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src/main.rs Normal file
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use std::fs::File;
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 {
let result = File::options().read(true).write(true).append(true).open(&filename);
match result {
Ok(file) => file,
Err(_) => {
eprintln!("Cannot open file: {}", filename);
std::process::exit(1);
}
}
}
fn parse_size(size: &str) -> usize {
let result = unbytify(size);
match result {
Ok(size) => size as usize,
Err(_) => {
eprintln!("Invalid size: {}", size);
std::process::exit(1);
}
}
}
fn parse_padding(padding: &str) -> u8 {
let result = padding.parse::<u8>();
match result {
Ok(padding) => padding,
Err(_) => {
eprintln!("Invalid padding: {}", padding);
std::process::exit(1);
}
}
}
fn main() {
let args = Args::parse();
let mut file = parse_filename(&args.filename);
let new_size = parse_size(&args.size);
let padding = parse_padding(&args.padding);
let current_size = file.metadata().unwrap().len() as usize;
println!("File: {}", args.filename);
println!("Current size: {}", current_size);
println!("New size: {}", new_size);
// if new size is bigger than current size, fill with padding until new size
if new_size > current_size {
let diff = new_size - current_size;
let buffer = vec![padding; diff];
file.write_all(&buffer).unwrap();
}
}