Crate apm 

Apple Partition Map (APM) reader.

Apple hybrid optical discs carry an Apple Partition Map so a Mac sees the disc’s partitions (typically an Apple_HFS slice alongside the ISO 9660 filesystem). The layout (Inside Macintosh: Devices) is big-endian, in fixed-size device blocks: block 0 is the Driver Descriptor Map (signature ER, carrying the block size), and blocks 1.. are partition entries (signature PM), the first of which reports how many entries the map holds.

This crate reads the map for detection and partition geometry (name, type, start block, block count). Validated against a real hdiutil APM.

For forensic anomaly detection (overlaps, out-of-bounds, map-count inconsistency, residual/hidden entries) see the apm-partition-forensic crate.

Structs

ApmPartition

One Apple Partition Map entry.

ApplePartitionMap

A parsed Apple Partition Map.

Enums

Error

Crate-level error type. (Manual impl — no thiserror dependency.)

Functions

parse

Parse an Apple Partition Map from a buffer beginning at the device start (block 0 = Driver Descriptor Map). Returns None without the ER/PM signatures or if the buffer is too short.