LHA

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LHA/LZH Archive Preview.

At a glance


Purpose	An LHA (LZH) archive under the .lha and .lzs extensions: members with -lh?- method headers.
Extensions	`.lha`
Poka parser	`poka-lha`
Viewer	`poka-table-viewer`
Depth tier	Parser with a shared viewer (see Depth tiers)
Breadth tier	B4 Summary (see Breadth tiers)

How much Poka reads

B4 Summary. The container and metadata are read and summarised (counts, properties, structure), but the main content is not rendered.

Confidence: medium (the reviewer read the code). Basis: Reviewed 2026-10-26: read parsers/poka-lha/src/main.rs (291 lines) and plugin.json. No unit tests or tests/samples.rs; the corpus has no .lha and .lzs sample. Covers .lha and .lzs. The table lists every member (header levels 0 to 3) with name, original and compressed size, ratio, method, header level, OS, CRC-16 and the raw modification time. Judgement: B4: the archive is listed but no member is extracted or shown.

What Poka does not read

Member contents are not extracted or shown
Modification times are shown raw
Extended headers other than the file name (directory, attributes, comments) are not read
Only the first 5,000 members are listed; files over 256 MiB are cut (flagged)

Libraries

Libraries Poka uses or has assessed for this format, with the status, licence and language the registry records.

delharc (candidate; MIT OR Apache-2.0; Rust; https://docs.rs/crate/delharc/0.8.0) — Parses LHA/LZH headers and decompresses entries; supports no_std with alloc.
unarc-rs (candidate; MIT OR Apache-2.0; Rust; https://github.com/mkrueger/unarc-rs) — Universal archive extraction & decompression library for retro + modern formats (7z, ZIP, RAR, LHA/LZH, TAR, ACE, ARJ, ARC/PAK, ZOO, HA, JAR, UC2, SQ/SQ2, SQZ, HYP, gz, bz2, Z, ICE, Pack-Ice).; v0.7.2

Sources

parsers/poka-lha/src/main.rs
parsers/poka-lha/plugin.json