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a063755 Apr 20, 2014
@charliesome @pczarn @igstan @alexjg
61 lines (53 sloc) 997 Bytes
#![no_std]
#![allow(ctypes)]
enum Color {
Black = 0,
Blue = 1,
Green = 2,
Cyan = 3,
Red = 4,
Pink = 5,
Brown = 6,
LightGray = 7,
DarkGray = 8,
LightBlue = 9,
LightGreen = 10,
LightCyan = 11,
LightRed = 12,
LightPink = 13,
Yellow = 14,
White = 15,
}
enum Option<T> {
None,
Some(T)
}
struct IntRange {
cur: int,
max: int
}
impl IntRange {
fn next(&mut self) -> Option<int> {
if self.cur < self.max {
self.cur += 1;
Some(self.cur - 1)
} else {
None
}
}
}
fn range(lo: int, hi: int) -> IntRange {
IntRange { cur: lo, max: hi }
}
fn clear_screen(background: Color) {
for i in range(0, 80 * 25) {
unsafe {
*((0xb8000 + i * 2) as *mut u16) = (background as u16) << 12;
}
}
}
#[no_mangle]
#[no_split_stack]
pub fn main() {
clear_screen(LightRed);
}