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Commit 56168f24 authored by Jooyung Han's avatar Jooyung Han
Browse files

libbinder_rs: Support fixed-size arrays 

Serialize/Deserialize (and their friends) are added to [T;N] types.

Bug: 207087196
Test: aidl_integration_test
Change-Id: If36340d8dbed89ec000a2917a42accd9875c8ecd
parent bbfe6b12

libs/binder/rust/src/parcel/parcelable.rs

+33 −0
Original line number Diff line number Diff line
@@ -652,6 +652,39 @@ impl<T: DeserializeArray> DeserializeOption for Vec<T> { 
    }

}



impl<T: SerializeArray, const N: usize> Serialize for [T; N] {

    fn serialize(&self, parcel: &mut BorrowedParcel<'_>) -> Result<()> {

        // forwards to T::serialize_array.

        SerializeArray::serialize_array(self, parcel)

    }

}



impl<T: SerializeArray, const N: usize> SerializeOption for [T; N] {

    fn serialize_option(this: Option<&Self>, parcel: &mut BorrowedParcel<'_>) -> Result<()> {

        SerializeOption::serialize_option(this.map(|arr| &arr[..]), parcel)

    }

}



impl<T: SerializeArray, const N: usize> SerializeArray for [T; N] {}



impl<T: DeserializeArray, const N: usize> Deserialize for [T; N] {

    fn deserialize(parcel: &BorrowedParcel<'_>) -> Result<Self> {

        let vec = DeserializeArray::deserialize_array(parcel)

            .transpose()

            .unwrap_or(Err(StatusCode::UNEXPECTED_NULL))?;

        vec.try_into().or(Err(StatusCode::BAD_VALUE))

    }

}



impl<T: DeserializeArray, const N: usize> DeserializeOption for [T; N] {

    fn deserialize_option(parcel: &BorrowedParcel<'_>) -> Result<Option<Self>> {

        let vec = DeserializeArray::deserialize_array(parcel)?;

        vec.map(|v| v.try_into().or(Err(StatusCode::BAD_VALUE))).transpose()

    }

}



impl<T: DeserializeArray, const N: usize> DeserializeArray for [T; N] {}



impl Serialize for Stability {

    fn serialize(&self, parcel: &mut BorrowedParcel<'_>) -> Result<()> {

        i32::from(*self).serialize(parcel)