Problem with stringbuf

[Andre Paim]

The following program:

#include <iostream>
#include <iterator>
#include <istream>
#include <sstream>

int main()
{
char buffer[] = {0x01, 0x0C, 0x1B};
std::stringbuf str_buf;
str_buf.pubsetbuf(buffer, sizeof (buffer));
std::istream iss(&str_buf);
std::cout.setf( std::ios::hex, std::ios::basefield );
std::copy(std::istream_iterator<char>(iss),
std::istream_iterator<char>(), std:stream_iterator<unsigned
short>(std::cout, " "));
return (0);

Generates the output (gcc 4.2 on Linux):

1 1b

Why it does not print the 0x0C value?

Is there any way to modify this program in order to print the 3 bytes?

Regards,
Andre

 

[Fraser Ross]

"Andre Paim"

#include <iostream>
#include <iterator>
#include <istream>
#include <sstream>

str_buf.pubsetbuf(buffer, sizeof (buffer));

setbuf in basic_streambuf only returns the this pointer. I don't think
it is overridden in basic_stringbuf. You are expecting it to call setg
to set up the get area. The Dinkumware library does not override it and
the get area isn't set up.

std::cout.setf( std::ios::hex, std::ios::basefield );

The format flags are in ios_base.

Fraser.