Struct Fat32 

pub struct Fat32 { /* private fields */ }

FAT32 allocation-table descriptor.

Implementations

impl Fat32

pub fn new(start: usize, size: usize, count: usize, max_cluster: u32) -> Self

Creates a FAT32 table descriptor.

pub fn max_cluster(&self) -> u32

Get the maximum cluster number.

pub fn next_cluster<T: Read + Seek>( &self, reader: &mut T, cluster: usize, ) -> Result<Option<u32>>

Returns the next cluster in a chain, or None at end-of-chain.

pub fn write_clus<T: Read + Write + Seek>( &self, io: &mut T, cluster: usize, value: u32, ) -> Result<()>

Write a cluster entry to all FAT table copies

pub fn allocate_cluster<T: Read + Write + Seek>( &self, rw: &mut T, hint: u32, ) -> Result<u32>

Allocate a single cluster, returns the allocated cluster number. Searches starting from hint for a free cluster.

pub fn allocate_chain<T: Read + Write + Seek>( &self, rw: &mut T, count: usize, hint: u32, ) -> Result<u32>

Allocate a chain of clusters, linking them together. Returns the first cluster of the allocated chain.

pub fn free_chain<T: Read + Write + Seek>( &self, rw: &mut T, start: u32, ) -> Result<u32>

Free a cluster chain starting at start, returns count of freed clusters.

pub fn truncate_chain<T: Read + Write + Seek>( &self, rw: &mut T, cluster: u32, ) -> Result<u32>

Truncate a cluster chain after the specified cluster.

The specified cluster becomes the end of chain (marked with end-of-chain marker). All clusters following it are freed.

Returns the number of clusters freed.

pub fn mark_bad<T: Read + Write + Seek>( &self, rw: &mut T, cluster: u32, ) -> Result<()>

Mark a cluster as bad (0x0FFFFFF7) in all FAT copies.

pub fn extend_chain<T: Read + Write + Seek>( &self, rw: &mut T, last: u32, count: usize, hint: u32, ) -> Result<u32>

Extend a cluster chain by appending new clusters. Returns the first cluster of the newly allocated portion.

impl Fat32

pub fn read_entry<T: Read + Seek>( &self, reader: &mut T, cluster: usize, ) -> Result<u32>

Read a raw FAT32 entry.