mirror of
https://github.com/italicsjenga/agb.git
synced 2024-12-23 16:21:33 +11:00
48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
use agb::external::portable_atomic::{AtomicU32, Ordering};
|
|
use agb::{
|
|
save::{Error, SaveManager},
|
|
Gba,
|
|
};
|
|
|
|
static MAXIMUM_LEVEL: AtomicU32 = AtomicU32::new(0);
|
|
static SAVE_OFFSET: usize = 0xFF;
|
|
|
|
pub fn init_save(gba: &mut Gba) -> Result<(), Error> {
|
|
gba.save.init_sram();
|
|
|
|
let mut access = gba.save.access()?;
|
|
|
|
let mut buffer = [0; 1];
|
|
access.read(0, &mut buffer)?;
|
|
|
|
if buffer[0] != 0 {
|
|
access.prepare_write(0..1)?.write(0, &[0])?;
|
|
core::mem::drop(access);
|
|
save_max_level(&mut gba.save, 0)?;
|
|
} else {
|
|
let mut buffer = [0; 4];
|
|
access.read(SAVE_OFFSET, &mut buffer)?;
|
|
let max_level = u32::from_le_bytes(buffer);
|
|
|
|
if max_level > 100 {
|
|
MAXIMUM_LEVEL.store(0, Ordering::SeqCst)
|
|
} else {
|
|
MAXIMUM_LEVEL.store(max_level, Ordering::SeqCst)
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub fn load_max_level() -> u32 {
|
|
MAXIMUM_LEVEL.load(Ordering::SeqCst)
|
|
}
|
|
|
|
pub fn save_max_level(save: &mut SaveManager, level: u32) -> Result<(), Error> {
|
|
save.access()?
|
|
.prepare_write(SAVE_OFFSET..SAVE_OFFSET + 4)?
|
|
.write(SAVE_OFFSET, &level.to_le_bytes())?;
|
|
MAXIMUM_LEVEL.store(level, Ordering::SeqCst);
|
|
Ok(())
|
|
}
|