On Sat, 2016-01-02 at 12:52 +0000, Daniel SHahaf wrote: > Yves Martin wrote on Sat, Jan 02, 2016 at 12:29:54 +0100: > > Hello, > > > > I am reading section "Packing revision properties (format 6+)" of file > > https://svn.apache.org/repos/asf/subversion/trunk/subversion/libsvn_fs_fs/structure > > > > but I do not find explanation about the two first bytes of a packed > > revprops corresponds to. They are visible just before the > > "header" (first revision, number of revision, and each prop set sizes) > > > > As that file says: > > We always apply data compression to the pack file - using the > SVN_DELTA_COMPRESSION_LEVEL_NONE level if compression is disabled. > (Note that compression at SVN_DELTA_COMPRESSION_LEVEL_NONE is not > a no-op stream transformation although most of the data will remain > human readable.) > > I assume those two bytes are the compression artifact, i.e., they won't > be visible if you read the file through svn_stream_compressed(). See > libsvn_subr/compress.c:zlib_encode().
Hello, Thank you for that idea. Source comment indicates that two bytes correspond to original/uncompressed content size. These bytes are written whatever the content is compressed or not. Regards -- Yves Martin
