Re: Hex to ascii hex

From:

Victor Bazarov <v.Abazarov@comAcast.net>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 20 Jun 2008 10:22:20 -0400

Message-ID:

<g3geer$fdc$1@news.datemas.de>

goodTweetieBird wrote:

Is there a lib routine for converting an arbitrary number of bytes to
their ascii representation or must one do it byte by byte? I receive
known quantities of bytes from a pipe and need to display them as hex
for debugging purposes.

#include <string>
#include <algorithm>

struct AppendHexTo {
    std::string & towhat;
    AppendHexTo(std::string& w) : towhat(w) {}
    void operator()(unsigned char b) {
       static char const hexdigit[] = "0123456789ABCDEF";
       towhat += hexdigit[(b & 0xF0) >> 4];
       towhat += hexdigit[b & 0x0F];
    }
};

#include <iostream>
#include <ostream>

int main()
{
    unsigned char buffer[] = { 1,2,3,4,5,6,7,8,9,10,11,12,
       100,101,102,103,104,105,106 };
    std::string result;

    std::for_each(buffer, buffer + sizeof(buffer), AppendHexTo(result));

    std::cout << result << std::endl;
}

V
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