inline time_duration str_from_delimited_time_duration(const std::basic_string<char_type>& s) { unsigned short min=0, sec =0; int hour =0; bool is_neg = (s.at(0) == '-'); boost::int64_t fs=0; int pos = 0; typedef typename std::basic_string<char_type>::traits_type traits_type; typedef boost::char_separator<char_type, traits_type> char_separator_type; typedef boost::tokenizer<char_separator_type, typename std::basic_string<char_type>::const_iterator, std::basic_string<char_type> > tokenizer; typedef typename boost::tokenizer<char_separator_type, typename std::basic_string<char_type>::const_iterator, typename std::basic_string<char_type> >::iterator tokenizer_iterator; char_type sep_chars[5] = {'-',':',',','.'}; char_separator_type sep(sep_chars); tokenizer tok(s,sep); for(tokenizer_iterator beg=tok.begin(); beg!=tok.end();++beg){ switch(pos) { case 0: { hour = boost::lexical_cast<int>(*beg); break; } case 1: { min = boost::lexical_cast<unsigned short>(*beg); break; } case 2: { sec = boost::lexical_cast<unsigned short>(*beg); break; }; case 3: { int digits = static_cast<int>(beg->length()); //Works around a bug in MSVC 6 library that does not support //operator>> thus meaning lexical_cast will fail to compile. #if (defined(BOOST_MSVC) && (_MSC_VER < 1300)) // msvc wouldn't compile 'time_duration::num_fractional_digits()' // (required template argument list) as a workaround a temp // time_duration object was used time_duration td(hour,min,sec,fs); int precision = td.num_fractional_digits(); // _atoi64 is an MS specific function if(digits >= precision) { // drop excess digits fs = _atoi64(beg->substr(0, precision).c_str()); } else { fs = _atoi64(beg->c_str()); } #else int precision = time_duration::num_fractional_digits(); if(digits >= precision) { // drop excess digits fs = boost::lexical_cast<boost::int64_t>(beg->substr(0, precision)); } else { fs = boost::lexical_cast<boost::int64_t>(*beg); } #endif if(digits < precision){ // trailing zeros get dropped from the string, // "1:01:01.1" would yield .000001 instead of .100000 // the power() compensates for the missing decimal places fs *= power(10, precision - digits); } break; } default: break; }//switch pos++; } if(is_neg) { return -time_duration(hour, min, sec, fs); } else { return time_duration(hour, min, sec, fs); } }