56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
// ---- time_string: thin wrapper around std::strftime -------- //
|
|
//
|
|
// Copyright Gennaro Prota 2006
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// ------------------------------------------------------------------
|
|
//
|
|
// $Id$
|
|
|
|
#ifndef BOOST_TIME_STRING_HPP_GP_20060731
|
|
#define BOOST_TIME_STRING_HPP_GP_20060731
|
|
|
|
#include <string>
|
|
#include <ctime>
|
|
|
|
#include <boost/config/warning_disable.hpp>
|
|
|
|
namespace boost {
|
|
|
|
// Many of the boost tools just need a quick way to obtain
|
|
// a formatted "run date" string or similar. This is one.
|
|
//
|
|
// In case of failure false is returned and result is
|
|
// unchanged.
|
|
//
|
|
inline
|
|
bool time_string(std::string & result
|
|
, const std::string & format = "%X UTC, %A %d %B %Y")
|
|
{
|
|
// give up qualifying names and using std::size_t,
|
|
// to avoid including "config.hpp"
|
|
using namespace std;
|
|
|
|
const int sz = 256;
|
|
char buffer [ sz ] = { 0 };
|
|
const time_t no_cal_time ( -1 );
|
|
time_t tod;
|
|
|
|
const bool ok =
|
|
time ( &tod ) != no_cal_time
|
|
&& strftime( buffer, sz, format.c_str(), gmtime( &tod ) ) != 0
|
|
;
|
|
|
|
if (ok)
|
|
result = buffer;
|
|
|
|
return ok;
|
|
}
|
|
|
|
}
|
|
|
|
#endif // include guard
|