need a gzipofstream class

[Ittay Freiman]

i need a class that compresses the bytes in-memory (that is, doesn't write
them to file and then compresses that file). do you know one?

thanx,
ittay

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Ittay Freiman. (mailto:it...@tecnomatix.com)
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[Dietmar Kuehl]

Hi,
In article <7ts0nn$hsi$1...@news.netvision.net.il>,

"Ittay Freiman" <it...@tecnomatix.com> wrote:
> i need a class that compresses the bytes in-memory (that is, doesn't
> write them to file and then compresses that file). do you know one?

For the compression have a look at zlib. This provides a C interface to
the compression and decompression used by gzip. To create an IOStream
interface to this stream, you would derive a class from 'streambuf'
which calls the zlib functions. To sent the characters to an arbitrary
destination, this stream buffer would be just a filtering stream buffer,
ie. it would get another stream buffer where the compressed stream is
read from or written to.
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<mailto:dietma...@claas-solutions.de>
homepage: <http://www.informatik.uni-konstanz.de/~kuehl>

Sent via Deja.com http://www.deja.com/
Before you buy.

[Paul]

zlib is at http://cdrom.com/pub/infozip/zlib

In the unsupported contrib directory of the zlib distribution there are
two iostream implementations.

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Paul Scott <pms...@dera.gov.uk>

[Dietmar Kuehl]

Hi,
In article <slrn803tm...@toilet.dera.gov.uk>,

pa...@toilet.dera.gov.uk (Paul) wrote:
> On Mon, 11 Oct 1999 10:14:12 GMT,
> Dietmar Kuehl <dietma...@claas-solutions.de> wrote:
> >In article <7ts0nn$hsi$1...@news.netvision.net.il>,
> > "Ittay Freiman" <it...@tecnomatix.com> wrote:
> >> i need a class that compresses the bytes in-memory

> zlib is at http://cdrom.com/pub/infozip/zlib

This should be <http://www.cdrom.com/pub/infozip/zlib/>.

> In the unsupported contrib directory of the zlib distribution there
> are two iostream implementations.

Neither of these two implementations uses a filtering stream buffer:
Both access files directly. This is not what was originally required.
However, these implementations might be useful as a guide when
implementing a stream buffer which does the compression and uses another
stream buffer to do the actual character I/O.

[Dietmar Kuehl]

[William Roeder]

Ittay Freiman wrote:
>
> i need a class that compresses the bytes in-memory (that is, doesn't write
> them to file and then compresses that file). do you know one?

Any reference book on compression should suffice

http://www.amazon.com/exec/obidos/query/%28keyword%20%3D%20%22compression%22%29
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