fennec-modbus 0.87.2

Modular Modbus client implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

//! Convenience traits to read and write low-level protocol structures.

use alloc::vec::Vec;

use binrw::{
    BinRead,
    BinReaderExt,
    BinWrite,
    io::{Cursor, Seek, Write},
};

use crate::protocol::Error;

pub trait Readable: for<'a> BinRead<Args<'a> = ()> {
    /// Read [`Self`] from the slice.
    fn from_bytes(bytes: &[u8]) -> Result<Self, Error>;
}

impl<T: for<'a> BinRead<Args<'a> = ()>> Readable for T {
    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
        Ok(Cursor::new(bytes).read_be()?)
    }
}

pub trait Writable: for<'a> BinWrite<Args<'a> = ()> {
    /// Write [`Self`] into a [`Vec`] and return it.
    fn to_bytes(&self) -> Result<Vec<u8>, Error>;

    /// Write [`Self`] to the writer.
    fn write_to(&self, writer: &mut (impl Write + Seek)) -> Result<(), Error>;
}

impl<T: for<'a> BinWrite<Args<'a> = ()>> Writable for T {
    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
        let mut cursor = Cursor::new(Vec::new());
        self.write_to(&mut cursor)?;
        Ok(cursor.into_inner())
    }

    fn write_to(&self, writer: &mut (impl Write + Seek)) -> Result<(), Error> {
        self.write_be(writer)?;
        Ok(())
    }
}