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extern crate libc;
extern crate melib;
use melib::Envelope;
use std::ffi::CString;
use std::os::raw::c_char;
#[no_mangle]
pub extern "C" fn print_envelope(ptr: *const Envelope) -> *const c_char {
unsafe {
assert!(!ptr.is_null(), "Null pointer in print_envelope");
//println!("got addr {}", p as u64);
//unsafe { CString::new("blah".to_string()).unwrap().as_ptr() }
let s = CString::new(format!("{:?}", *ptr)).unwrap();
drop(ptr);
let p = s.as_ptr();
std::mem::forget(s);
p
}
}
#[no_mangle]
pub extern "C" fn get_empty_envelope() -> *mut Envelope {
let mut ret = Envelope::default();
let ptr = std::ptr::NonNull::new(&mut ret as *mut Envelope)
.expect("Envelope::default() has a NULL pointer?");
let ptr = ptr.as_ptr();
std::mem::forget(ret);
ptr
}
#[no_mangle]
pub extern "C" fn destroy_cstring(ptr: *mut c_char) {
unsafe {
let slice = CString::from_raw(ptr);
drop(slice);
}
}
#[no_mangle]
pub extern "C" fn envelope_size() -> libc::size_t {
std::mem::size_of::<Envelope>()
}