src/main.rs


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#![no_main]
#![no_std]
#![feature(alloc_error_handler)]

mod system_alloc;

extern crate alloc;
use libc::cstr;
use safe_libc as libc;

use core::fmt::Write;

#[no_mangle]
pub extern "C" fn main(_nargs: libc::c_int, _args: *const *const libc::c_char) -> libc::c_int {
	let mut stdout = libc::stdio::stdout();

	{
		let foo = cstr!("Foo!\n");
		let _ = stdout.puts(foo);
	}

	{
		let x = libc::string::CString::from("foo");
		let l = x.len();
		let y = x.into_raw();
		let z = unsafe { alloc::boxed::Box::from_raw(core::ptr::slice_from_raw_parts_mut(y, l)) };
		let _ = writeln!(stdout, "Foo: {} {} {}", z[0], z[1], z[2]);
	}

	{
		let b = alloc::boxed::Box::new(42);
		let _ = writeln!(stdout, "Bar: {}", b);
	}

	{
		let x = alloc::boxed::Box::new(());
		let _ = writeln!(stdout, "Box: {:?}", x);
	}

	0
}

#[panic_handler]
fn panic(info: &core::panic::PanicInfo) -> ! {
	let _ = writeln!(libc::stdio::stderr(), "Panic: {}", info);
	unsafe { libc::abort() }
}