Per-mount allocator state: next-free hint, free count, FAT cache.
The little-endian byte codec and the runtime sector-geometry reads.
Cross-TU prototypes of the exFAT DIRECTORY seam.
The exFAT streaming-write mechanism: entry-set positions and its helpers.
Cross-TU prototypes for the GPT partition locators.
Cross-TU prototypes of the VFAT long-name WRITE seam.
Cross-TU helper prototypes for the FAT/exFAT adapter (part A of 2).
Cross-TU helper prototypes for the FAT/exFAT adapter (part B of 2).
On-disk timestamp field offsets, packing constants, and stampers.
Cross-TU on-disk-layout enums and typedefs for the FAT/exFAT adapter.
UTF-8 <-> UTF-16LE conversion and case folding for ra8_fs names.