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% File src/library/base/man/memCompress.Rd
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% File src/library/base/man/memCompress.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 2009-11 R Core Team
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% Copyright 2009-2017 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{memCompress}
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\name{memCompress}
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\alias{memCompress}
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\alias{memCompress}
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\alias{memDecompress}
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\alias{memDecompress}
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  compressed with \command{xz} version 4.999 and some versions of
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  compressed with \command{xz} version 4.999 and some versions of
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  \command{lzma}.  There are other versions, in particular \sQuote{raw}
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  \command{lzma}.  There are other versions, in particular \sQuote{raw}
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  streams, that are not currently handled.
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  streams, that are not currently handled.
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  All the types of compression can expand the input: for \code{"gzip"}
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  All the types of compression can expand the input: for \code{"gzip"}
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  and \code{"bzip"} the maximum expansion is known and so
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  and \code{"bzip2"} the maximum expansion is known and so
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  \code{memCompress} can always allocate sufficient space.  For
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  \code{memCompress} can always allocate sufficient space.  For
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  \code{"xz"} it is possible (but extremely unlikely) that compression
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  \code{"xz"} it is possible (but extremely unlikely) that compression
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  will fail if the output would have been too large.
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  will fail if the output would have been too large.
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}
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}
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}
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}
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\seealso{
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\seealso{
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  \link{connections}.
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  \link{connections}.
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  \code{\link{extSoftVersion}} for the versions of the \code{zlib},
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  \code{bzip2} and \code{xz} libraries in use.
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  \url{https://en.wikipedia.org/wiki/Data_compression} for background on
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  \url{https://en.wikipedia.org/wiki/Data_compression} for background on
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  data compression, \url{http://zlib.net/},
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  data compression, \url{http://zlib.net/},
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  \url{https://en.wikipedia.org/wiki/Gzip}, \url{http://www.bzip.org/},
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  \url{https://en.wikipedia.org/wiki/Gzip}, \url{http://www.bzip.org/},
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  \url{https://en.wikipedia.org/wiki/Bzip2}, \url{http://tukaani.org/xz/}
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  \url{https://en.wikipedia.org/wiki/Bzip2}, \url{http://tukaani.org/xz/}
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  and \url{https://en.wikipedia.org/wiki/Xz} for references about the
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  and \url{https://en.wikipedia.org/wiki/Xz} for references about the