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use {
    crate::UuidBytes,
    byteorder::LE,
    static_assertions::const_assert_eq,
    zerocopy::{AsBytes, FromBytes, Unaligned, U64},
};

/// This structure is used to define the backing device storage that compose a
/// [`Chunk`].
///
/// [`Chunk`]: crate::Chunk
#[derive(Copy, Clone, Debug, Hash, PartialEq, AsBytes, FromBytes, Unaligned)]
#[repr(C, packed)]
pub struct Stripe {
    /// The ID of the device that contains this stripe.
    pub devid: U64<LE>,

    /// Location of the start of the stripe, in bytes.
    ///
    /// The length is determined by the `stripe_len` field of the associated
    /// `Chunk`.
    pub offset: U64<LE>,

    /// UUID of the device that contains this stripe.
    ///
    /// This can be used to confirm that the correct device has been retrieved.
    pub dev_uuid: UuidBytes,
}
const_assert_eq!(std::mem::size_of::<Stripe>(), 32);