On Thu, Apr 7, 2011 at 4:28 PM, Steven Watanabe <watanabesj@gmail.com> wrote:

AMDG

On 04/07/2011 12:09 PM, Anders Knudby wrote:

Hello all, please help! I'm truly banging my head against the wall here. I
am trying to write a function that will allow me to write gzipped binary
files (~50 MB) and read them again. I have data in memory. Here's my code
for writing:

namespace io = boost::iostreams;

filename = "c:/test.bin.gz"; //My output file
int size = 5000000; //Data size in bytes, ~5 MB

//Create filtering_ostream
io::filtering_ostream out; //Creates a filtering_ostream called out
out.push(io::gzip_compressor()); //Assigns the gzip_compressor to out
out.push(io::file_sink(filename)); //Assigns a file sink to out

char* memblock = new char [size]; //This is my data. In reality memblock
will have been created earlier and filled with real data

out.write(memblock, size); //Do the writing

delete[] memblock; //Clean up

As written above the resulting file, c:/test.bin.gz, is corrupt. If I try to
decompress it, either with gzip or winrar, I get an error message. However,
if I instead set size = 4000000 (~4 MB) (slightly smaller), the resulting
file works just fine. My problem therefore is that my actual size is 50
MB...

Have you checked that the stream is closed correctly?
I tried on Linux, and it seemed to work fine
after a added #includes/main etc.

In Christ,
Steven Watanabe
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