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use elrond_codec::TryStaticCast;
use crate::{
api::{EndpointFinishApi, ErrorApi, ManagedTypeApi},
elrond_codec::{EncodeError, TopEncode, TopEncodeOutput},
err_msg,
types::{BigInt, BigUint, ManagedBuffer, ManagedType},
};
struct ApiOutputAdapter<FA>
where
FA: ManagedTypeApi + EndpointFinishApi + Clone + 'static,
{
api: FA,
}
impl<FA> ApiOutputAdapter<FA>
where
FA: ManagedTypeApi + EndpointFinishApi + Clone + 'static,
{
#[inline]
fn new(api: FA) -> Self {
ApiOutputAdapter { api }
}
}
impl<FA> TopEncodeOutput for ApiOutputAdapter<FA>
where
FA: ManagedTypeApi + EndpointFinishApi + Clone + 'static,
{
type NestedBuffer = ManagedBuffer<FA>;
fn set_slice_u8(self, bytes: &[u8]) {
self.api.finish_slice_u8(bytes);
}
fn set_u64(self, value: u64) {
self.api.finish_u64(value);
}
fn set_i64(self, value: i64) {
self.api.finish_i64(value);
}
#[inline]
fn set_unit(self) {
}
#[inline]
fn set_specialized<T, F>(self, value: &T, else_serialization: F) -> Result<(), EncodeError>
where
T: TryStaticCast,
F: FnOnce(Self) -> Result<(), EncodeError>,
{
if let Some(managed_buffer) = value.try_cast_ref::<ManagedBuffer<FA>>() {
self.api.finish_managed_buffer_raw(managed_buffer.handle);
Ok(())
} else if let Some(big_uint) = value.try_cast_ref::<BigUint<FA>>() {
self.api.finish_big_uint_raw(big_uint.handle);
Ok(())
} else if let Some(big_int) = value.try_cast_ref::<BigInt<FA>>() {
self.api.finish_big_int_raw(big_int.handle);
Ok(())
} else {
else_serialization(self)
}
}
fn start_nested_encode(&self) -> Self::NestedBuffer {
ManagedBuffer::new_empty(self.api.clone())
}
fn finalize_nested_encode(self, nb: Self::NestedBuffer) {
self.api.finish_managed_buffer_raw(nb.handle);
}
}
pub trait EndpointResult: Sized {
type DecodeAs;
fn finish<FA>(&self, api: FA)
where
FA: ManagedTypeApi + EndpointFinishApi + Clone + 'static;
}
impl<T> EndpointResult for T
where
T: TopEncode,
{
type DecodeAs = Self;
fn finish<FA>(&self, api: FA)
where
FA: ManagedTypeApi + EndpointFinishApi + Clone + 'static,
{
self.top_encode_or_exit(ApiOutputAdapter::new(api.clone()), api, finish_exit);
}
}
#[inline(always)]
fn finish_exit<FA>(api: FA, encode_err: EncodeError) -> !
where
FA: ManagedTypeApi + EndpointFinishApi + ErrorApi + 'static,
{
let mut message_buffer =
ManagedBuffer::new_from_bytes(api.clone(), err_msg::FINISH_ENCODE_ERROR);
message_buffer.append_bytes(encode_err.message_bytes());
api.signal_error_from_buffer(message_buffer.get_raw_handle())
}