On Wed, May 13, 2009 at 3:11 AM, Christopher Currie <christopher@currie.com> wrote:

On Mon, May 11, 2009 at 2:17 PM, Early Ehlinger <earlye@gmail.com> wrote:
> Basically, you need to create a streambuf class that calls
> PySys_WriteStdout() inside your_streambuf_class::sync().

>> http://lists.boost.org/mailman/listinfo.cgi/boost-users

It's probably fairly straightforward to do this using Boost.Iostreams,
by creating a model of Sink:

include <Python.h>

#include <algorithm> // min
#include <iosfwd> // streamsize
#include <boost/iostreams/categories.hpp> // sink_tag
#include <boost/iostreams/stream.hpp> // stream
#include <boost/format.hpp> // format

class pysys_stdout_sink {
public:
typedef char char_type;
typedef boost::iostreams::sink_tag category;

std::streamsize write( const char* s, std::streamsize n ) {
// PySys_WriteStdout truncates to 1000 chars
static const std::streamsize MAXSIZE = 1000;

std::streamsize written = std::min( n, MAXSIZE );
PySys_WriteStdout( (boost::format("%%.%1%s") %
written).str().c_str(), s );

return written;
}
};

boost::iostreams::stream<pysys_stdout_sink> pysys_stdout;

int main()
{
Py_Initialize();
pysys_stdout << "Hello, Python world!\n";
}

HTH,
Christopher

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