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gzipとdictionaryに関するyassのブックマーク (2)

Mathieu's log » Blog Archive » Dictzip reader in Ruby
yass 2013/10/24
" the original uncompressed file is divided into chunks of equal size. Chunks must be below 64KB. Each chunk is compressed separately, then the number of chunks and the size of each chunk (in its compressed form) is kept in a table in the gzip file header. "

gzip

dictzip

compression

dictionary
リンク
dictzip, dictunzip - compress (or expand) files, allowing random access
DICTZIP(1) DICTZIP(1) NAME dictzip, dictunzip - compress (or expand) files, allowing random access SYNOPSIS dictzip [options] name dictunzip [options] name DESCRIPTION dictzip compresses files using the gzip(1) algorithm (LZ77) in a manner which is completely compatible with the gzip file format. An extension to the gzip file format (Extra Field, described in 2.3.1.1 of RFC 1952) allows extra data
yass 2013/10/24
" The CHLEN field specifies the length of a "chunk" of data. The CHCNT field specifies how many chunks are preset, and the CHCNT words of data specifies how long each chunk is after compression (i.e., in the current compressed file). "

compression

gzip

dictionary

dictzip
リンク
1

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