checking for printable characters

[qazmlp]

How do you check whether an std::string object contains only printable characters ?

[Russell Hanneken]

"qazmlp" <qa********@red iffmail.com> wrote in message
news:db******** *************** **@posting.goog le.com...

How do you check whether an std::string object contains only printable
characters ?

I think this would work:

#include <algorithm>
#include <cctype>
#include <functional>
#include <string>

namespace util
{
bool isAllPrintable (std::string const &s)
{
typedef std::unary_nega te<
std::pointer_to _unary_function <int, int> > NotFunc;
NotFunc isNotPrintable( std::ptr_fun(st d::isprint));
return std::find_if(s. begin(), s.end(), isNotPrintable) ==
s.end();
}
}

--
Russell Hanneken
rh*******@pobox .com

[John Harrison]

"qazmlp" <qa********@red iffmail.com> wrote in message
news:db******** *************** **@posting.goog le.com...

How do you check whether an std::string object contains only printable

characters ?

bool printable = true;
for (string::const_ iterator i = s.begin(); i != s.end(); ++i)
{
if (!isprint(*i))
{
printable = false;
break;
}
}

Why anyone would prefer using something from <algorithm> beats me, but each
to his own.

john