agb/agb-gbafix/src/main.rs
2023-07-26 09:53:32 +01:00

82 lines
2.7 KiB
Rust

use anyhow::{anyhow, bail, Result};
use clap::{arg, value_parser};
use std::{
fs,
io::{BufWriter, Write},
path::PathBuf,
};
use agb_gbafix::write_gba_file;
fn main() -> Result<()> {
let matches = clap::Command::new("agb-gbafix")
.about("Convert elf files directly to a valid GBA ROM")
.arg(arg!(<INPUT> "Input elf file").value_parser(value_parser!(PathBuf)))
.arg(arg!(-o --output <OUTPUT> "Set output file, defaults to replacing INPUT's extension to .gba").value_parser(value_parser!(PathBuf)))
.arg(arg!(-t --title <TITLE> "Set the title. At most 12 bytes. Defaults to truncating the input file name"))
.arg(arg!(-c --gamecode <GAME_CODE> "Sets the game code, 4 bytes"))
.arg(arg!(-m --makercode <MAKER_CODE> "Set the maker code, 2 bytes"))
.arg(arg!(-r --gameversion <VERSION> "Set the version of the game, 0-255").value_parser(value_parser!(u8)))
.arg(arg!(-p --padding "Ignored for compatibility with gbafix"))
.get_matches();
let input = matches.get_one::<PathBuf>("INPUT").unwrap();
let output = match matches.get_one::<PathBuf>("output") {
Some(output) => output.clone(),
None => input.with_extension("gba"),
};
let mut header = gbafix::GBAHeader::default();
{
let title = if let Some(title) = matches.get_one::<String>("title") {
title.clone()
} else {
let title = input
.file_stem()
.ok_or_else(|| anyhow!("Invalid filename {}", input.to_string_lossy()))?
.to_string_lossy();
title.into_owned()
};
for (i, &c) in title.as_bytes().iter().enumerate().take(12) {
header.title[i] = c;
}
}
if let Some(maker_code) = matches.get_one::<String>("makercode") {
let maker_code = maker_code.as_bytes();
if maker_code.len() > 2 {
bail!(
"Maker code must be at most 2 bytes, got {}",
maker_code.len()
);
}
header.maker_code = [
*maker_code.first().unwrap_or(&0),
*maker_code.get(1).unwrap_or(&0),
];
}
if let Some(game_version) = matches.get_one::<u8>("gameversion") {
header.version = *game_version;
}
if let Some(game_code) = matches.get_one::<String>("gamecode") {
for (i, &c) in game_code.as_bytes().iter().enumerate().take(4) {
header.game_code[i] = c;
}
}
let mut output = BufWriter::new(fs::File::create(output)?);
let file_data = fs::read(input)?;
write_gba_file(file_data.as_slice(), header, &mut output)?;
output.flush()?;
Ok(())
}