mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
42 lines
997 B
Rust
42 lines
997 B
Rust
// run-pass
|
|
// ignore-wasm32-bare no libc to test ffi with
|
|
// ignore-sgx no libc
|
|
#![feature(rustc_private)]
|
|
|
|
extern crate libc;
|
|
|
|
use libc::{c_double, c_int};
|
|
use std::mem;
|
|
|
|
fn to_c_int(v: &mut isize) -> &mut c_int {
|
|
unsafe { mem::transmute_copy(&v) }
|
|
}
|
|
|
|
fn lgamma(n: c_double, value: &mut isize) -> c_double {
|
|
unsafe {
|
|
return m::lgamma(n, to_c_int(value));
|
|
}
|
|
}
|
|
|
|
mod m {
|
|
use libc::{c_double, c_int};
|
|
|
|
extern "C" {
|
|
#[cfg(all(unix, not(target_os = "vxworks")))]
|
|
#[link_name="lgamma_r"]
|
|
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
|
|
#[cfg(windows)]
|
|
#[link_name = "lgamma"]
|
|
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
|
|
#[cfg(target_os = "vxworks")]
|
|
#[link_name = "lgamma"]
|
|
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
let mut y: isize = 5;
|
|
let x: &mut isize = &mut y;
|
|
assert_eq!(lgamma(1.0 as c_double, x), 0.0 as c_double);
|
|
}
|