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