Crate fat_fs_types 

Rust crate fat_fs_types

Low-level #![no_std] helper library for accessing Microsoft’s FAT12/16/32 and exFAT file systems. Only defines constants, types and some very simple functions.

You will want to use one of the features zerocopy or bytemuck (together with the respective crate).

A lot of the structs in here only implement Copy if you have feature = "bytemuck" enabled since some of them are quite large. All #[repr(C)] structs with public fields have a stable layout, no padding and an alignment of 1.

• EFI FAT specification: download
• exFAT specification

License

This crate is licensed under the MIT license.

Re-exports

pub use bytemuck;

pub use zerocopy;

Modules

exfat

exFAT.

fat

FAT12/16/32.

Structs

ChsAddr

A cylinder-head-sector address in the format used by x86’s interrupt 0x13.

DiskGeometry

Hard disk geometry values used by x86’s interrupt 0x13.

PackDateError

Error thrown by pack_date.

Constants

MAX_BLK_SIZE

MAX_YEAR

MIN_BLK_SIZE

MIN_YEAR

NONEXISTENT_CLUSTERS

Number of clusters that show up at the start of the FAT but don’t correspond to a heap allocation.

Functions

pack_date

Encodes (year, month, day) into a packed native-endian FAT/exFAT date.

pack_time

Encodes (hours, minutes, millis) into a packed native-endian FAT/exFAT time, rounding down.

unpack_date

Decodes a packed native-endian FAT/exFAT date into (year, month, day).

unpack_time

Decodes a packed native-endian FAT/exFAT time into (hours, minutes, millis).

Type Aliases

ClusterIdx

Guid

A globally unique identifier (usually called universally unique identifier/UUID outside the Microsoft world) with mixed endianness.

Lba

Logical block addressing address or offset.

U16Le

Unaligned little-endian 16-bit integer.

U32Le

Unaligned little-endian 32-bit integer.

U64Le

Unaligned little-endian 64-bit integer.