Working with the various stream classes in POCO. - POCO C++ ...

#include "Poco/UnbufferedStreamBuf.h"
#include
#include
class UpperStreamBuf: public UnbufferedStreamBuf
{
public:
UpperStreamBuf(std::ostream& ostr): _ostr(ostr)
{
}
protected:
int writeToDevice(char c)
{
_ostr.put(toupper(c));
return charToInt(c);
}
private:
std::ostream& _ostr;
};