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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#[doc(hidden)]
pub use bincode as _bincode;
/// Takes a type, a serializer, and a deserializer name. The type must implement serde::Serialize.
/// Defines a pair of ffi functions that go along with the MOZ_DEFINE_RUST_PARAMTRAITS macro.
#[macro_export]
macro_rules! define_ffi_serializer {
($ty:ty, $serializer:ident, $deserializer:ident) => {
#[no_mangle]
pub extern "C" fn $serializer(
v: &$ty,
out_len: &mut usize,
out_cap: &mut usize,
) -> *mut u8 {
*out_len = 0;
*out_cap = 0;
let mut buf = match $crate::_bincode::serialize(v) {
Ok(buf) => buf,
Err(..) => return std::ptr::null_mut(),
};
*out_len = buf.len();
*out_cap = buf.capacity();
let ptr = buf.as_mut_ptr();
std::mem::forget(buf);
ptr
}
#[no_mangle]
pub unsafe extern "C" fn $deserializer(
input: *const u8,
len: usize,
out: *mut $ty,
) -> bool {
let slice = std::slice::from_raw_parts(input, len);
let element = match $crate::_bincode::deserialize(slice) {
Ok(buf) => buf,
Err(..) => return false,
};
std::ptr::write(out, element);
true
}
};
}
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