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/*
*
* * Copyright (c) 2025 Couchbase, Inc.
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
*
*/
use std::fmt::{Debug, Display};
use crate::memdx::error::Error;
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum Magic {
Req,
Res,
ReqExt,
ResExt,
ServerReq,
ServerRes,
}
impl Magic {
pub fn is_request(&self) -> bool {
matches!(self, Magic::Req | Magic::ReqExt)
}
pub fn is_response(&self) -> bool {
matches!(self, Magic::Res | Magic::ResExt)
}
pub fn is_extended(&self) -> bool {
matches!(self, Magic::ReqExt | Magic::ResExt)
}
}
impl From<Magic> for u8 {
fn from(value: Magic) -> u8 {
match value {
Magic::Req => 0x80,
Magic::Res => 0x81,
Magic::ReqExt => 0x08,
Magic::ResExt => 0x18,
Magic::ServerReq => 0x82,
Magic::ServerRes => 0x83,
}
}
}
impl TryFrom<u8> for Magic {
type Error = Error;
fn try_from(value: u8) -> Result<Self, Self::Error> {
let magic = match value {
0x80 => Magic::Req,
0x81 => Magic::Res,
0x08 => Magic::ReqExt,
0x18 => Magic::ResExt,
0x82 => Magic::ServerReq,
0x83 => Magic::ServerRes,
_ => {
return Err(Error::new_message_error(format!("unknown magic {value}")));
}
};
Ok(magic)
}
}
impl Display for Magic {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let txt = match self {
Magic::Req => "Req",
Magic::Res => "Res",
Magic::ReqExt => "ReqExt",
Magic::ResExt => "ResExt",
Magic::ServerReq => "ServerReq",
Magic::ServerRes => "ServerRes",
};
write!(f, "{txt}")
}
}