On Monday, December 06, 2010 12:58:37 Peter Tyser wrote: > On Sun, 2010-12-05 at 16:16 +0100, Luigi 'Comio' Mantellini wrote: > > XZ (aka LZMA2) is the new version of lzma compression format. > > The following patch add a cut-down version of XZ Embedded library > > (v20100702) that supports only single-call API. > > > > In order to enable XZ support, the CONFIG_XZ must be defined by board > > configuration file. > > > > For any details, please refer to XZ Embedded homesite > > (http://tukaani.org/xz/embedded.html) > > If I understand the xz format correctly, its nearly identical to lzma, > and the 'xz' utility can decompress .lzma files too. Any chance the xz > code you're adding can be used to handle lzma-compressed archives? If > so, can we deprecate CONFIG_LZMA and have the new CONFIG_XZ support > handle both .xz and .lzma archives? Or at least share a significant > chunk of code between the two formats?
my understanding is that the compression algorithm is the same, but the ".xz" file format adds nice/detectable header of metadata where as ".lzma" does not. so yes, i believe the two should have quite a lot of [undesirable] overlap. -mike
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