101 lines
2.6 KiB
Rust
101 lines
2.6 KiB
Rust
mod static_data;
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type OwnedPtr<T> = *mut T;
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type BorrowedPtr<T> = *const T;
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macro_rules! ffi_getter {
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(
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$type:ty, $func:ident, $returns: ty
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) => {
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paste::paste! {
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#[no_mangle]
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extern "C" fn [< $type:snake _ $func >](ptr: ExternPointer<$type>) -> $returns {
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ptr.as_ref().$func()
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}
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}
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};
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}
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macro_rules! ffi_stringkey_getter {
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(
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$type:ty, $func:ident
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) => {
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paste::paste! {
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#[no_mangle]
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extern "C" fn [< $type:lower _ $func >](ptr: ExternPointer<$type>) -> OwnedPtr<c_char> {
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std::ffi::CString::new(ptr.as_ref().$func().str()).unwrap().into_raw()
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}
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}
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};
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}
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macro_rules! ffi_vec_value_getters {
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(
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$type:ty, $func:ident, $returns: ty
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) => {
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paste::paste! {
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#[no_mangle]
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extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<$type>) -> usize {
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ptr.as_ref().$func().len()
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}
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#[no_mangle]
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extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<$type>, index: usize) -> $returns {
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*ptr.as_ref().$func().get(index).unwrap()
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}
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}
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};
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}
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macro_rules! ffi_vec_stringkey_getters {
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(
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$type:ident, $func:ident
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) => {
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paste::paste! {
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#[no_mangle]
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extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<$type>) -> usize {
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ptr.as_ref().$func().len()
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}
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#[no_mangle]
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extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<$type>, index: usize) -> OwnedPtr<c_char> {
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CString::new(ptr.as_ref().$func().get(index).unwrap().str()).unwrap().into_raw()
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}
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}
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};
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}
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pub(self) use ffi_getter;
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pub(self) use ffi_stringkey_getter;
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pub(self) use ffi_vec_stringkey_getters;
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pub(self) use ffi_vec_value_getters;
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#[repr(C)]
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pub(self) struct ExternPointer<T: ?Sized> {
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ptr: *mut T,
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}
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impl<T: ?Sized> ExternPointer<T> {
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pub(self) fn as_ref(&self) -> &T {
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unsafe {
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self.ptr.as_ref().expect(&format!(
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"Given pointer of type '{}' was null",
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std::any::type_name::<T>()
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))
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}
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}
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pub(self) fn as_mut(&self) -> &mut T {
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unsafe {
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self.ptr.as_mut().expect(&format!(
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"Given pointer of type '{}' was null",
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std::any::type_name::<T>()
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))
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}
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}
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}
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impl<T> Into<ExternPointer<T>> for *mut T {
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fn into(self) -> ExternPointer<T> {
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ExternPointer { ptr: self }
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}
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}
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