Getting a buffer into a stringstream in hex representation:

Question

If I had a buffer like:

uint8_t buffer[32];

and it was filled up completely with values, how could I get it into a stringstream, in hexadec

Answer 1

Look at the stream modifiers: std::setw and std::setfill. It will help you.

Answer 2

#include <sstream>
#include <iomanip>

std::stringstream ss;
ss << std::hex << std::setfill('0');
for (int i = 0; i < 32; ++i)
{
    ss << std::setw(2) << static_cast<unsigned>(buffer[i]);
}