| //@ run-pass |
| //@ ignore-wasm32 wasi-libc does not have lgamma |
| //@ ignore-sgx no libc |
| |
| use std::ffi::{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 std::ffi::{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); |
| } |
