Trait OnDiskStruct 

pub(crate) trait OnDiskStruct: Sized {
    const ON_DISK_SIZE: usize;

    // Required methods
    fn load_from(bytes: &[u8]) -> Result<Self>;
    fn store_to(&self, bytes: &mut [u8]) -> Result<()>;

    // Provided methods
    fn on_disk_size(&self) -> usize { ... }
    fn load_from_le(bytes: &[u8]) -> Result<Self> { ... }
    fn store_to_le(&self, bytes: &mut [u8]) -> Result<()> { ... }
    fn load_from_be(bytes: &[u8]) -> Result<Self> { ... }
    fn store_to_be(&self, bytes: &mut [u8]) -> Result<()> { ... }
}

A structure to be loaded from or stored on disk (e.g. qcow2 image header), in binary format.

Required Associated Constants

const ON_DISK_SIZE: usize

The on-disk size of this structure, in bytes

Required Methods

fn load_from(bytes: &[u8]) -> Result<Self>

Load this structure from the given slice, in default inherent endianness.

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

Store this structure in the given slice, in default inherent endianness.

Provided Methods

fn on_disk_size(&self) -> usize

Convenience alias for Self::ON_DISK_SIZE for objects

fn load_from_le(bytes: &[u8]) -> Result<Self>

Load this structure from the given slice.

Use little endian, unless the structure has a specific inherent endianness.

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

Store this structure in the given slice.

Use little endian, unless the structure has a specific inherent endianness.

fn load_from_be(bytes: &[u8]) -> Result<Self>

Load this structure from the given slice.

Use big endian, unless the structure has a specific inherent endianness.

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

Store this structure in the given slice.

Use big endian, unless the structure has a specific inherent endianness.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl OnDiskStruct for u16

const ON_DISK_SIZE: usize

fn load_from_le(bytes: &[u8]) -> Result<Self>

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

fn load_from_be(bytes: &[u8]) -> Result<Self>

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

fn load_from(bytes: &[u8]) -> Result<Self>

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

impl OnDiskStruct for u32

const ON_DISK_SIZE: usize

fn load_from_le(bytes: &[u8]) -> Result<Self>

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

fn load_from_be(bytes: &[u8]) -> Result<Self>

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

fn load_from(bytes: &[u8]) -> Result<Self>

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

impl OnDiskStruct for u64

const ON_DISK_SIZE: usize

fn load_from_le(bytes: &[u8]) -> Result<Self>

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

fn load_from_be(bytes: &[u8]) -> Result<Self>

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

fn load_from(bytes: &[u8]) -> Result<Self>

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

impl OnDiskStruct for AtomicU32

const ON_DISK_SIZE: usize

fn load_from_le(bytes: &[u8]) -> Result<Self>

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

fn load_from_be(bytes: &[u8]) -> Result<Self>

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

fn load_from(bytes: &[u8]) -> Result<Self>

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

impl OnDiskStruct for AtomicU64

const ON_DISK_SIZE: usize

fn load_from_le(bytes: &[u8]) -> Result<Self>

fn store_to_le(&self, bytes: &mut [u8]) -> Result<()>

fn load_from_be(bytes: &[u8]) -> Result<Self>

fn store_to_be(&self, bytes: &mut [u8]) -> Result<()>

fn load_from(bytes: &[u8]) -> Result<Self>

fn store_to(&self, bytes: &mut [u8]) -> Result<()>

Implementors

impl OnDiskStruct for HeaderExtensionHeader

const ON_DISK_SIZE: usize

impl OnDiskStruct for V2Header

const ON_DISK_SIZE: usize

impl OnDiskStruct for V3HeaderBase

const ON_DISK_SIZE: usize