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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![crate_name="externcallback"]
#![crate_type = "lib"]
#![feature(libc)]
extern crate libc;
pub mod rustrt {
extern crate libc;
#[link(name = "rust_test_helpers")]
extern {
pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
data: libc::uintptr_t)
-> libc::uintptr_t;
}
}
pub fn fact(n: libc::uintptr_t) -> libc::uintptr_t {
unsafe {
println!("n = {}", n);
rustrt::rust_dbg_call(cb, n)
}
}
pub extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
if data == 1 {
data
} else {
fact(data - 1) * data
}
}
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