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These classes provide a C++ stream interface to the zlib library. It allows you
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to do things like:
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gzofstream outf("blah.gz");
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outf << "These go into the gzip file " << 123 << endl;
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It does this by deriving a specialized stream buffer for gzipped files, which is
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the way Stroustrup would have done it. :->
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The gzifstream and gzofstream classes were originally written by Kevin Ruland
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and made available in the zlib contrib/iostream directory. The older version still
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compiles under gcc 2.xx, but not under gcc 3.xx, which sparked the development of
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this version.
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The new classes are as standard-compliant as possible, closely following the
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approach of the standard library's fstream classes. It compiles under gcc versions
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3.2 and 3.3, but not under gcc 2.xx. This is mainly due to changes in the standard
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library naming scheme. The new version of gzifstream/gzofstream/gzfilebuf differs
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from the previous one in the following respects:
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- added showmanyc
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- added setbuf, with support for unbuffered output via setbuf(0,0)
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- a few bug fixes of stream behavior
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- gzipped output file opened with default compression level instead of maximum level
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- setcompressionlevel()/strategy() members replaced by single setcompression()
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The code is provided "as is", with the permission to use, copy, modify, distribute
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and sell it for any purpose without fee.
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Ludwig Schwardt
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<schwardt@sun.ac.za>
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DSP Lab
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Electrical & Electronic Engineering Department
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University of Stellenbosch
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South Africa
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