byteme

Macro to provide from() & into() implementations for a struct with either enums and positive integer field.

We have made the following assumptions about the fields of the struct:

• The fields are public.
• The fields will have the following types
  • u8
  • u16
  • u32
  • u64
  • u128
  • usize
  • [u8]
  • an enum
• For enum, we must attach a #[byte_me($size)] attribute, where size is any of the positive integer types.
• The enum declration must #[derive(FromPrimitive)] from the num-derive crate.

The num-derive crate is required to generate the FromPrimitive trait for enums. Having said that, the same functionality can be achieved using num-enum crate. It provides furthur control over the enum data types, and might prove handy. here is the discussion on the topic.

Example

```rust use byteme::ByteMe; pub use num_derive::FromPrimitive;

[derive(Debug, FromPrimitive)]

pub enum Mode { Unavailable = 0, Unauthenticated = 1, Authenticated = 2, Encrypted = 4, }

[derive(ByteMe, Debug)]

pub struct FrameOne { pub unused: [u8; 12], #[byte_me(u32)] pub mode: Mode, pub challenge: [u8; 16], pub salt: [u8; 16], pub count: u32, pub mbz: [u8; 12], };

let frame = FrameOne { unused: [0; 12], mode: Mode::Authenticated, challenge: [0; 16], salt: [0; 16], count: 1024, mbz: [0; 12], };

let size = FrameOne::SIZE; // Get the number of bytes in the frame let bytes: Vec = frame.into(); // Converts the frame into vector of bytes let frame: FrameOne = bytes.into(); // Converts the bytes back to frame ```