Struct VolumeReader 

pub struct VolumeReader<'a, R, M> {
    source: &'a R,
    map: M,
    block_size: u32,
    data_offset: u32,
    leb_size: u32,
    size: u64,
}

Reader over the data of a volume in a UBI image.

Returned by super::Image::volume. Byte n of the volume is in logical eraseblock n / leb_size. A read goes to the blocks of the image that contain those logical eraseblocks, without a buffer. Like in the kernel, logical eraseblocks without a block read as 0xFF.

M is the block map, see super::Image::volume.

Fields

source: &'a R

map: M

block_size: u32

data_offset: u32

leb_size: u32

size: u64

Implementations

impl<'a, R, M: AsRef<[u32]>> VolumeReader<'a, R, M>

pub(crate) const fn new( source: &'a R, map: M, block_size: u32, data_offset: u32, leb_size: u32, size: u64, ) -> Self

pub const fn leb_size(&self) -> u32

Returns the bytes of data in a logical eraseblock of the volume. It excludes the padding that the alignment of the volume leaves.

pub fn block(&self, lnum: u32) -> Option<u32>

Returns the index of the block in the image that contains logical eraseblock lnum, or None if there is none.

pub fn into_map(self) -> M

Returns the block map.

Trait Implementations

impl<R, M> Debug for VolumeReader<'_, R, M>

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

Formats the value using the given formatter.

impl<R: ReadAt, M: AsRef<[u32]>> ReadAt for VolumeReader<'_, R, M>

type Error = VolumeReadError<<R as ReadAt>::Error>

Error of a failed read.

fn read_exact_at(&self, offset: u64, buf: &mut [u8]) -> Result<(), Self::Error>

Fills buf with the bytes at offset.

fn size(&self) -> Result<u64, Self::Error>

Returns the size of the source in bytes.