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Import new dependency into repository: gzstream

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Celtic Minstrel
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<html> <head>
<title>Gzstream Library Home Page</title>
</head>
<body BGCOLOR="FAF8E8" TEXT="#000000">
<h1>Gzstream Library Home Page</h1>
<hr>
<TABLE><TR><TD ALIGN=LEFT VALIGN=TOP>
<img border=0 src="logo.gif" align=center>
</TD><TD ALIGN=LEFT VALIGN=TOP NOWRAP>
<ul>
<li><a href="#intro"> Introduction</a>
<li><a href="#sys"> Supported Systems</a>
<li><a href="#inst"> Installation</a>
<li><a href="#doc"> Documentation</a>
<li><a href="#miss"> What's Missing</a>
<li><a href="#src"> Download</a>
<li><a href="#links"> Links</a><P>
</ul>
</TD></TR></TABLE>
<hr><!-------------------------------------------------------------------->
<a name="intro"><h2> Introduction </h2></a>
<i>Gzstream</i> is a small C++ library, basically just a wrapper,
that provides the functionality of the
<a href="http://www.gzip.org/zlib/">zlib C-library</a> in a C++ iostream.
It is freely available under the <a href="COPYING.LIB">LGPL license</a>.<P>
Gzstream has been written by
<a href="http://www.cs.unc.edu/~debug/">Deepak Bandyopadhyay</a> and
<a href="http://www.cs.unc.edu/~kettner/">Lutz Kettner</a> at
the <a href="http://www.cs.unc.edu/Research/compgeom/">Computational
Geometry Group at UNC Chapel Hill</a>.<P>
<hr><!-------------------------------------------------------------------->
<a name="sys"><h2> Supported Systems </h2></a>
Gzstream requires a standard compliant C++ compiler (we use the new
header file conventions and the new iostream in the std:: name space)
and, of course, zlib. We used zlib 1.1.3 so far, but see the <a
href="http://www.gzip.org/zlib/">zlib home page</a> for why you should
upgrade to zlib 1.1.4. So, in theory, the provided sources could run
on many platforms. However, we used only the following few
platforms.<P>
<P>
<ul>
<li> PC Linux, RedHat 6.1, g++ version 2.95.2
<li> PC Linux, Debian, g++ version 2.95.2 and 3.1
<li> SGI Irix 6.5, MIPSpro CC version 7.30
</ul><P>
<hr><!-------------------------------------------------------------------->
<a name="inst"><h2> Installation </h2></a>
Either compile <tt>gzstream.C</tt> by hand, place it in some library,
and move <tt>gzstream.h</tt> into the include search path of your
compiler. Or use the provided <tt>Makefile</tt>, adapt its
variables, and follow the remarks in the <tt>Makefile</tt>. Two
test programs are provided, <tt>test_gzip.C</tt> and <tt>test_gunzip.C</tt>.
The <tt>Makefile</tt> contains a rule that performs a small test
with these programs.<P>
<hr><!-------------------------------------------------------------------->
<a name="doc"><h2> Documentation </h2></a>
The library provides two classes, <tt>igzstream</tt> and <tt>ogzstream</tt>,
that can be used analogously to <tt>ifstream</tt> and <tt>ofstream</tt>
respectively.<P>
The classes are by default in the global name space. This can
be changed by setting the macro <tt>GZSTREAM_NAMESPACE</tt> to
the desired name space, e.g., by setting the option
</tt>-DGZSTREAM_NAMESPACE=gz</tt> in the <tt>Makefile</tt>.
However, this needs to be consistent for both, the library compilation
and the application that uses the library.<P>
<hr><!-------------------------------------------------------------------->
<a name="miss"><h2> What's Missing </h2></a>
<ul>
<li> Seek. The zlib library provides the necessary functionality,
but we have not realized that in the wrapper (yet? ;-).
<li> Both streams are based on the same streambuffer. So, they
cannot be used to derive an iogzstream class that would allow
simultaneous reading and writing to the same file.
</ul><P>
<hr><!-------------------------------------------------------------------->
<a name="src"><h2> Download and Release Notes</h2></a>
<ul>
<li> Gzstream library 1.5 (08 Apr 2003):
<a href="gzstream.tgz">gzstream.tgz</a><br>
Fixed bug that did not set the state correctly on failure to open or
close a file. <br>
Fixed bug in the indexing of the write buffer that
caused the write buffer to shrink continously and finally caused
wrong results when writing compressed files (only observed on some
platforms). <P>
<li> Gzstream library 1.4 (27 Apr 2002):<br>
Fixed a bug that stopped stream output after calling <tt>flush()</tt>
or using <tt>std::endl</tt>.<P>
<li> Gzstream library 1.3 (06 Nov 2001):<br>
Fixed unsigned char -- signed char bug. Increased buffer size
for better performance.<P>
<li> Gzstream library 1.2 (04 Oct 2001):<br>
Initial release as gzstream, renamed from zipstream.<P>
<li> Zipstream library 1.1 (09 Sep 2001):<br>
Initial release.
</ul>
<hr><!-------------------------------------------------------------------->
<a name="links"><h2> Acknowledgements </h2></a>
Credits for finding bugs and improving this software go to:
Vincent Ricard, Peter Milley, Peter J. Torelli, and Ares Lagae.
<P>
<hr><!-------------------------------------------------------------------->
<a name="links"><h2> Links </h2></a>
<ul>
<li><a href="http://www.gzip.org/zlib/">zlib C-library</a>
<li><a href="http://www.cs.unc.edu/~debug/">Deepak Bandyopadhyay</a>
<li><a href="http://www.cs.unc.edu/~kettner/">Lutz Kettner</a>
<li><a href="http://www.cs.unc.edu/Research/compgeom/">
The Computational Geometry Group at UNC Chapel Hill</a>
</ul>
<hr><!-------------------------------------------------------------------->
<address>
The Computational Geometry Group at UNC Chapel Hill, Jan. 08, 2003.
</address>
</body> </html>
<!-------------------------------------------------------------------->
<!EOF>