Struct Geometry 

pub struct Geometry {
    block_count: u32,
    block_size: u32,
    page_size: u32,
}

Size, erase block size and page size of an MTD device.

Holding a Geometry proves that the sizes are usable: pages and blocks are not empty, a block is a whole number of pages and the device is a whole number of blocks.

Fields

block_count: u32

block_size: u32

page_size: u32

Implementations

impl Geometry

pub(crate) fn new( size: u64, block_size: u32, page_size: u32, ) -> Result<Self, DeviceError>

Validates the sizes reported by the device.

pub const fn block_count(&self) -> u32

Returns the number of erase blocks.

pub const fn block_size(&self) -> u32

Returns the erase block size in bytes.

pub const fn page_size(&self) -> u32

Returns the page size in bytes. Writes must cover whole pages.

pub fn size(&self) -> u64

Returns the size of the device in bytes.

pub(crate) const fn block_len(&self) -> usize

Returns the erase block size as a buffer length.

pub(crate) fn offset(&self, block: u32) -> Result<u64, DeviceError>

Returns the byte offset of block after checking its range.

pub(crate) fn read_offset( &self, block: u32, offset: u32, len: usize, ) -> Result<u64, DeviceError>

Returns the byte offset of a read of len bytes from block, starting offset bytes into it.

pub(crate) fn write_offset( &self, block: u32, len: usize, ) -> Result<u64, DeviceError>

Returns the byte offset of block for a write of len bytes.

Trait Implementations

impl Clone for Geometry

fn clone(&self) -> Geometry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Geometry

impl Debug for Geometry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Geometry

impl PartialEq for Geometry

fn eq(&self, other: &Geometry) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Geometry