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1 These classes provide a C++ stream interface to the zlib library. It allows you
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2 to do things like:
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3
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4 gzofstream outf("blah.gz");
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5 outf << "These go into the gzip file " << 123 << endl;
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6
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7 It does this by deriving a specialized stream buffer for gzipped files, which is
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8 the way Stroustrup would have done it. :->
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9
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10 The gzifstream and gzofstream classes were originally written by Kevin Ruland
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11 and made available in the zlib contrib/iostream directory. The older version still
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12 compiles under gcc 2.xx, but not under gcc 3.xx, which sparked the development of
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13 this version.
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14
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15 The new classes are as standard-compliant as possible, closely following the
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16 approach of the standard library's fstream classes. It compiles under gcc versions
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17 3.2 and 3.3, but not under gcc 2.xx. This is mainly due to changes in the standard
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18 library naming scheme. The new version of gzifstream/gzofstream/gzfilebuf differs
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19 from the previous one in the following respects:
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20 - added showmanyc
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21 - added setbuf, with support for unbuffered output via setbuf(0,0)
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22 - a few bug fixes of stream behavior
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23 - gzipped output file opened with default compression level instead of maximum level
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24 - setcompressionlevel()/strategy() members replaced by single setcompression()
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25
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26 The code is provided "as is", with the permission to use, copy, modify, distribute
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27 and sell it for any purpose without fee.
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28
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29 Ludwig Schwardt
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30 <schwardt@sun.ac.za>
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31
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32 DSP Lab
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33 Electrical & Electronic Engineering Department
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34 University of Stellenbosch
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35 South Africa
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