This crate provides macros to generate bitfield-like struct.

This a complete rewrite of the bitfield crate. You can find the previous version in the rust-bitfield-legacy repository. This version works on the stable version of rustc and use a different syntax with different possibility.

An IPv4 header could be described like that:

bitfield!{
    struct IpV4Header(MSB0 [u8]);
    u32;
    get_version, _: 3, 0;
    get_ihl, _: 7, 4;
    get_dscp, _: 13, 8;
    get_ecn, _: 15, 14;
    get_total_length, _: 31, 16;
    get_identification, _: 47, 32;
    get_df, _: 49;
    get_mf, _: 50;
    get_fragment_offset, _: 63, 51;
    get_time_to_live, _: 71, 64;
    get_protocol, _: 79, 72;
    get_header_checksum, _: 95, 79;
    get_source_address, _: 127, 96;
    get_destination_address, _: 159, 128;
}

In this example, all the fields are read-only, the _ as setter name signals to skip the setter method. The range at the end (e.g. 3, 0) defines the bit range where the information is encoded.

The documentation of the released version is available on doc.rs.

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.