49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
// ignore-fast
|
|
|
|
// Copyright 2012-2014 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.
|
|
|
|
extern crate libc;
|
|
|
|
use std::cast;
|
|
use libc::{c_double, c_int};
|
|
|
|
fn to_c_int(v: &mut int) -> &mut c_int {
|
|
unsafe {
|
|
cast::transmute_copy(&v)
|
|
}
|
|
}
|
|
|
|
fn lgamma(n: c_double, value: &mut int) -> c_double {
|
|
unsafe {
|
|
return m::lgamma(n, to_c_int(value));
|
|
}
|
|
}
|
|
|
|
mod m {
|
|
use libc::{c_double, c_int};
|
|
|
|
#[link_name = "m"]
|
|
extern {
|
|
#[cfg(unix)]
|
|
#[link_name="lgamma_r"]
|
|
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
|
|
#[cfg(windows)]
|
|
#[link_name="__lgamma_r"]
|
|
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
let mut y: int = 5;
|
|
let x: &mut int = &mut y;
|
|
assert_eq!(lgamma(1.0 as c_double, x), 0.0 as c_double);
|
|
}
|