Hex to ascii hex
in [Visual C]
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From: goodTweetieBird on 20 Jun 2008 09:47 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. thanx, gtb
From: Victor Bazarov on 20 Jun 2008 10:22 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 -- Please remove capital 'A's when replying by e-mail I do not respond to top-posted replies, please don't ask
From: goodTweetieBird on 20 Jun 2008 10:28 On Jun 20, 10:22 am, Victor Bazarov <v.Abaza...(a)comAcast.net> wrote: > 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 > -- > Please remove capital 'A's when replying by e-mail > I do not respond to top-posted replies, please don't ask Thanks!
From: Vladimir Grigoriev on 20 Jun 2008 12:10 "Victor Bazarov" <v.Abazarov(a)comAcast.net> wrote in message news:g3geer$fdc$1(a)news.datemas.de... > goodTweetieBird wrote: > #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]; It would be simpler to write towhat += hexdigit[b>> 4]; > towhat += hexdigit[b & 0x0F]; > } > }; Vladimir Grigoriev
From: Giovanni Dicanio on 21 Jun 2008 06:08
"goodTweetieBird" <goodTweetieBird(a)hotmail.com> ha scritto nel messaggio news:1a80fd9f-992b-47f2-b0a7-9794eaee5f1b(a)c58g2000hsc.googlegroups.com... > struct AppendHexTo { > std::string & towhat; > AppendHexTo(std::string& w) : towhat(w) {} I think 'w' can be passed as const reference here: AppendHexTo( const std::string & w ) ... Giovanni |