[Boost-users] Read/write with gzip

Hello, I previously managed to write data to a gzipped file using the following code structure (it's an example of course, the "memblock" is actually filled with real data and the real filename is specified elsewhere). #include #include #include #include #include #include namespace io = boost::iostreams; int size = 1000; char* memblock = new char [size]; io::filtering_ostream out; out.push(io::gzip_compressor()); out.push(io::file_descriptor_sink("c:/outfile.gz")); out.write (memblock, size); That works fine. I would now like to read these data again. I imagined I could do something like the following (using the same #include statements etc. as above): int size = 1000; char* memblock = new char [size]; io::filtering_istream in; in.push(io::gzip_decompressor()); in.push(io::file_descriptor_source("c:/outfile.gz")); in.read (memblock, size); That complies and runs, but it doesn't give me the real data back. What am I doing wrong? Anders