| 1 | #include <boost/iostreams/device/file.hpp>
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| 2 | #include <boost/iostreams/device/file_descriptor.hpp>
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| 3 | #include <boost/iostreams/filtering_streambuf.hpp>
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| 4 | #include <boost/iostreams/filtering_stream.hpp>
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| 5 | #include <boost/iostreams/copy.hpp>
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| 6 | #include <boost/iostreams/filter/gzip.hpp>
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| 7 | #include <boost/iostreams/categories.hpp>
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| 8 | #include <boost/iostreams/code_converter.hpp>
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| 9 | #include <cstdio>
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| 10 | #include <iostream>
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| 11 |
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| 12 | //#define WORKS
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| 13 | #define DO_NOT WORK
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| 14 |
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| 15 | /* Helper class for writing gzipped files */
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| 16 | class gzip_sink
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| 17 | {
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| 18 | public:
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| 19 | typedef char char_type;
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| 20 | typedef boost::iostreams::sink_tag category;
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| 21 |
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| 22 | boost::iostreams::filtering_ostream sink_; /* Sink used
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| 23 | to push filters */
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| 24 | std::ofstream &outifstr_; /* Write
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| 25 | stream to be pushed into sink */
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| 26 |
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| 27 | /* Constructor */
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| 28 | gzip_sink(std::ofstream &wrt) :
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| 29 | outifstr_(wrt)
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| 30 | {
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| 31 | #ifdef DO_NOT_WORK
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| 32 | /* Push gzip compressor */
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| 33 | sink_.push(boost::iostreams::gzip_compressor());
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| 34 |
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| 35 | /* Push file writer */
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| 36 | sink_.push(outifstr_);
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| 37 | #endif
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| 38 | }
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| 39 |
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| 40 | gzip_sink(const gzip_sink &rhs) :
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| 41 | outifstr_(rhs.outifstr_)
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| 42 | {
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| 43 | #ifdef DO_NOT_WORK
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| 44 | /* Push gzip compressor */
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| 45 | sink_.push(boost::iostreams::gzip_compressor());
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| 46 |
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| 47 | /* Push file writer */
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| 48 | sink_.push(outifstr_);
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| 49 | #endif
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| 50 | }
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| 51 |
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| 52 | /* Write function */
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| 53 | std::streamsize write( const char * s, std::streamsize n )
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| 54 | {
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| 55 | #ifdef WORKS
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| 56 | /* Push gzip compressor */
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| 57 | sink_.push(boost::iostreams::gzip_compressor());
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| 58 |
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| 59 | /* Push file writer */
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| 60 | sink_.push(outifstr_);
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| 61 | #endif
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| 62 |
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| 63 | /* Push write stream */
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| 64 | sink_.write(s,n);
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| 65 |
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| 66 | #ifdef WORKS
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| 67 | sink_.pop();
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| 68 | sink_.pop();
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| 69 | #endif
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| 70 |
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| 71 | return n;
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| 72 | }
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| 73 | };
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| 74 |
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| 75 | /* Typedef */
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| 76 | typedef boost::iostreams::code_converter<gzip_sink> convert_to_narrow_sink;
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| 77 |
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| 78 | int main(int argc, char *argv[])
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| 79 | {
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| 80 | std::wcout <<"sizeof : "<<sizeof(MyTest)<< std::endl;
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| 81 | std::wcout <<"sizeof : "<<sizeof(MyTest2)<< std::endl;
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| 82 |
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| 83 | std::ofstream strm("test.gz",std::ios_base::binary);
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| 84 |
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| 85 | gzip_sink gzip(strm);
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| 86 | convert_to_narrow_sink convert(gzip,1000);
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| 87 |
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| 88 | boost::iostreams::filtering_wostreambuf wbuf(convert,100);
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| 89 |
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| 90 | std::wostream wout(&wbuf);
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| 91 |
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| 92 | wout <<"Hello world!"<< std::endl;
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| 93 | }
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| 94 |
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