nx_sevenz_lib.nx

nx_sevenz_lib.nx -- THE 7z CONTAINER READER (/compare/modding MD29 sz_walk, 2026-09-06), written from the mirrored format document (knowledge/fetched/cmp_modding_7zFormat.txt, pin 395ad336) and method table (cmp_modding_7z_Methods.txt, pin 418d0748), both READ first. It composes the incumbents and adds no second ruler: nx_lzma_lib (LZMA and LZMA2 coders, the x86 BCJ branch converter), nxzip_crc32 from nx_zip (the reflected CRC-32 the 7z digests use), and nx_bundle_ingest_lib's record table, so a 7z walks to the SAME typed rows the zip walker fills and the texture binder and the partition run unchanged over both. WHAT IT READS: the 32-byte signature header (its own CRC verified), the next header (CRC verified), an ENCODED header (decoded through the folder that carries it, then parsed as the plain header), pack info, coders info (folders with their coder ids, properties, bind pairs and unpack sizes), substreams info (sizes and digests), and files info (empty-stream and empty-file bit vectors, UTF-16LE names converted to UTF-8). Directories are counted and left out of the table; empty files are rows with no bytes. Every member's bytes are CRC-checked against the archive's OWN digest -- the container is the oracle for the decoder. Coders: Copy (00), LZMA (03 01 01), LZMA2 (21), and the two-coder folder 7-Zip writes for executables, x86 BCJ (03 03 01 03) over LZMA or LZMA2 with the one bind pair in0 <- out1; any other coder or chain is REPORTED unsupported by name on every member it holds, never guessed at. Solid folders decode once into one buffer sized from the folder's declared unpack size and every member is a window into it. license_tier: ORIGINAL No hw writes (Rule 26).