42 lines
1.0 KiB
Rust
42 lines
1.0 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::libc;
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mod rustrt {
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use std::libc;
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pub extern {
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pub fn rust_dbg_call(cb: *u8, data: libc::uintptr_t)
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-> libc::uintptr_t;
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}
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}
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extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
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if data == 1u {
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data
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} else {
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count(data - 1u) + 1u
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}
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}
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fn count(n: uint) -> uint {
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unsafe {
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debug!("n = %?", n);
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rustrt::rust_dbg_call(cb, n)
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}
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}
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pub fn main() {
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let result = count(1000u);
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debug!("result = %?", result);
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assert_eq!(result, 1000u);
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}
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