ei: add support for libei

src/ei/ei_object.rs

@@ -0,0 +1,94 @@
+use {
+    crate::{
+        ei::{
+            ei_client::{EiClient, EiClientError},
+            EiContext,
+        },
+        utils::buffd::EiMsgParser,
+        wire_ei::EiHandshakeId,
+    },
+    std::{
+        cmp::Ordering,
+        fmt::{Display, Formatter, LowerHex},
+        rc::Rc,
+    },
+};
+
+pub const EI_HANDSHAKE_ID: EiHandshakeId = EiHandshakeId::from_raw(0);
+
+#[derive(Debug, Copy, Clone, Hash, Ord, PartialOrd, Eq, PartialEq)]
+pub struct EiObjectId(u64);
+
+impl EiObjectId {
+    #[allow(dead_code)]
+    pub const NONE: Self = EiObjectId(0);
+
+    pub fn from_raw(raw: u64) -> Self {
+        Self(raw)
+    }
+
+    pub fn raw(self) -> u64 {
+        self.0
+    }
+}
+
+impl Display for EiObjectId {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+impl LowerHex for EiObjectId {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        LowerHex::fmt(&self.0, f)
+    }
+}
+
+pub trait EiObjectBase {
+    fn id(&self) -> EiObjectId;
+    fn version(&self) -> EiVersion;
+    fn client(&self) -> &EiClient;
+    fn handle_request(
+        self: Rc<Self>,
+        client: &EiClient,
+        request: u32,
+        parser: EiMsgParser<'_, '_>,
+    ) -> Result<(), EiClientError>;
+    fn interface(&self) -> EiInterface;
+}
+
+pub trait EiObject: EiObjectBase + 'static {
+    fn break_loops(&self) {}
+
+    fn context(&self) -> EiContext {
+        self.client().context.get()
+    }
+}
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub struct EiInterface(pub &'static str);
+
+impl EiInterface {
+    pub fn name(self) -> &'static str {
+        self.0
+    }
+}
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
+pub struct EiVersion(pub u32);
+
+impl EiVersion {
+    // pub const ALL: EiVersion = EiVersion(0);
+}
+
+impl PartialEq<u32> for EiVersion {
+    fn eq(&self, other: &u32) -> bool {
+        self.0 == *other
+    }
+}
+
+impl PartialOrd<u32> for EiVersion {
+    fn partial_cmp(&self, other: &u32) -> Option<Ordering> {
+        self.0.partial_cmp(other)
+    }
+}