mruby-lzma : mruby bindings for lzma (xz) the compression library (unofficial)

mruby へ LZMA/XZ 圧縮ライブラリの機能を提供します。

HOW TO USAGE

圧縮

src = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
dest = LZMA.encode(src)
# dest は xz ユーティリティプログラムで伸長可能な string オブジェクトです

伸長

src = ... # LZMA.encode か xz ユーティリティプログラムで圧縮したデータ
dest = LZMA.decode(src)
# dest は伸長した string オブジェクト

圧縮 (簡易オプションの指定)

src = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

preset_level = 9
check_method = :sha256 # OR :none, :crc32, :crc64, nil (crc64)

dest = LZMA.encode(src, preset: preset_level, check: check_method)

圧縮 (フィルタの指定)

src = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

striping = 4 # for 4 bytes striping (e.g. 16bits-2ch audio, or RGBA32 pixel image
filter1 = LZMA.delta(striping)

preset_level = 9
filter2 = LZMA.lzma2(preset_level)

check_method = :sha256 # OR :none, :crc32, :crc64, nil (crc64)

dest = LZMA.encode(src, filter1, filter2, check: check_method)

Specification

• Product name: mruby-lzma
• Version: 0.3.2
• Product quality: PROTOTYPE
• Author: dearblue
• Report issue to: https://github.com/dearblue/mruby-lzma/issues
• Licensing: 2 clause BSD License
• Dependency external mrbgems:
  • mruby-aux under Creative Commons Zero License (CC0) by dearblue
• Dependency C libraries:
  • liblzma in XZ Utils under Public Domain by Lasse Collin