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fix wrapping math errors. Part of https://github.com/rust-console/gba/issues/129

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Lokathor 2021-04-11 18:00:18 -06:00
parent e595270bfe
commit d93facbaf4
1 changed files with 8 additions and 2 deletions
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10
examples/test_savegame.rs
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@ -1,6 +1,11 @@
#![no_std] #![no_std]
#![no_main] #![no_main]
// Note(Lokathor): this demo must be run in release mode or it'll just be way
// too slow. When testing is running the screen fills from yellow to green. If
// there's a panic you should see red. If all tests complete the screen turns
// blue at the end.
use core::cmp; use core::cmp;
use gba::{fatal, prelude::*, save::*, warn}; use gba::{fatal, prelude::*, save::*, warn};
@ -29,7 +34,7 @@ fn panic(info: &core::panic::PanicInfo) -> ! {
struct Rng(u32); struct Rng(u32);
impl Rng { impl Rng {
fn iter(&mut self) { fn iter(&mut self) {
self.0 = self.0 * 2891336453 + 100001; self.0 = self.0.wrapping_mul(2891336453).wrapping_add(100001);
} }
fn next_u8(&mut self) -> u8 { fn next_u8(&mut self) -> u8 {
self.iter(); self.iter();
@ -165,6 +170,7 @@ fn main() -> ! {
} }
// show a pattern so we know it worked // show a pattern so we know it worked
set_screen_color(0, 31, 0); set_screen_color(0, 29, 29);
output!("All tests complete!");
loop {} loop {}
} }