function addDuration(startDate, duration) {
  var end = getObjFromDate(startDate, false),
      endString = '';

  // Initialize all the values we need in end based on the duration
  zipDuration(end, duration);

  // Add Timezone offset to endString
  if(startDate.getTZHours() != undefined) {
    if(startDate.getTZHours() < 0) {
      endString += '-';
    } else {
      endString += '+';
    }
    endString += ('00'+Math.abs(startDate.getTZHours())).substr(-2,2);
    endString += ':'+('00'+Math.abs(startDate.getTZMinutes())).substr(-2,2);
  }

  if(duration.getSeconds()) {
    end.seconds += duration.getSeconds();
  }
  while(end.seconds && end.seconds >= 60) {
    end.seconds -= 60;
    end.minutes += 1;
  }
  if(end.seconds != undefined) {
    endString = ':'+('00'+end.seconds).substr(-2,2)+endString;
  }

  if(duration.getMinutes()) {
    end.minutes += duration.getMinutes();
  }
  while(end.minutes && end.minutes >= 60) {
    end.minutes -= 60;
    end.hours += 1;
  }
  if(end.minutes != undefined) {
    endString = ':'+('00'+end.minutes).substr(-2,2)+endString;
  }

  if(duration.getHours()) {
    end.hours += duration.getHours();
  }
  while(end.hours && end.hours >= 24) {
    end.hours -= 24;
    end.day += 1;
  }
  if(end.hours != undefined) {
    endString = 'T'+('00'+end.hours).substr(-2,2)+endString;
  }

  if(duration.getDays()) {
    end.day += duration.getDays();
  }
  while(end.day && end.day > GlobalUtil.daysInMonth(end.month, end.year)) {
    end.month += 1;
    if(end.month > 12) {
      end.month -= 12;
      end.year += 1;
    }
    end.day -= GlobalUtil.daysInMonth(end.month, end.year);
  }
  if(end.day != undefined) {
    endString = '-'+('00'+end.day).substr(-2,2)+endString;
  }

  if(duration.getMonths()) {
    end.month += duration.getMonths();
  }
  while(end.month && end.month > 12) {
    end.month -= 12;
    end.year += 1;
  }
  if(end.month != undefined) {
    endString = '-'+('00'+end.month).substr(-2,2)+endString;
  }

  if(duration.getYears()) {
    end.year += duration.getYears();
  }
  if(end.year != undefined) {
    endString = ('0000'+Math.abs(end.year)).substr(-4,4)+endString;
    if(end.year < 0) {
      endString = '-'+endString;
    } else {
      endString = '+'+endString;
    }
  }

  // After adding year we could have bumped into a non leap year
  // TODO fix this

  if(end.year > 9999) {
    throw new Error('New date out of range');
  }

  // TODO return actual simple or approximate dates
  if(startDate.isApproximate()) {
    endString = 'A'+endString;
    return new Approximate(endString);
  } else {
    return new Simple(endString);
  }

}
function addDuration(startDate, duration) {
  var end = getObjFromDate(startDate, false),
      endString = '';

  
  zipDuration(end, duration);

  
  if(startDate.getTZHours() != undefined) {
    if(startDate.getTZHours() < 0) {
      endString += '-';
    } else {
      endString += '+';
    }
    endString += ('00'+Math.abs(startDate.getTZHours())).substr(-2,2);
    endString += ':'+('00'+Math.abs(startDate.getTZMinutes())).substr(-2,2);
  }

  if(duration.getSeconds()) {
    end.seconds += duration.getSeconds();
  }
  while(end.seconds && end.seconds >= 60) {
    end.seconds -= 60;
    end.minutes += 1;
  }
  if(end.seconds != undefined) {
    endString = ':'+('00'+end.seconds).substr(-2,2)+endString;
  }

  if(duration.getMinutes()) {
    end.minutes += duration.getMinutes();
  }
  while(end.minutes && end.minutes >= 60) {
    end.minutes -= 60;
    end.hours += 1;
  }
  if(end.minutes != undefined) {
    endString = ':'+('00'+end.minutes).substr(-2,2)+endString;
  }

  if(duration.getHours()) {
    end.hours += duration.getHours();
  }
  while(end.hours && end.hours >= 24) {
    end.hours -= 24;
    end.day += 1;
  }
  if(end.hours != undefined) {
    endString = 'T'+('00'+end.hours).substr(-2,2)+endString;
  }

  if(duration.getDays()) {
    end.day += duration.getDays();
  }
  while(end.day && end.day > GlobalUtil.daysInMonth(end.month, end.year)) {
    end.month += 1;
    if(end.month > 12) {
      end.month -= 12;
      end.year += 1;
    }
    end.day -= GlobalUtil.daysInMonth(end.month, end.year);
  }
  if(end.day != undefined) {
    endString = '-'+('00'+end.day).substr(-2,2)+endString;
  }

  if(duration.getMonths()) {
    end.month += duration.getMonths();
  }
  while(end.month && end.month > 12) {
    end.month -= 12;
    end.year += 1;
  }
  if(end.month != undefined) {
    endString = '-'+('00'+end.month).substr(-2,2)+endString;
  }

  if(duration.getYears()) {
    end.year += duration.getYears();
  }
  if(end.year != undefined) {
    endString = ('0000'+Math.abs(end.year)).substr(-4,4)+endString;
    if(end.year < 0) {
      endString = '-'+endString;
    } else {
      endString = '+'+endString;
    }
  }

  
  

  if(end.year > 9999) {
    throw new Error('New date out of range');
  }

  
  if(startDate.isApproximate()) {
    endString = 'A'+endString;
    return new Approximate(endString);
  } else {
    return new Simple(endString);
  }

}
function addDuration ( startDate , duration ) { var end = getObjFromDate ( startDate , false ) , endString = '' ; // Initialize all the values we need in end based on the duration zipDuration ( end , duration ) ; // Add Timezone offset to endString if ( startDate . getTZHours ( ) != undefined ) { if ( startDate . getTZHours ( ) < 0 ) { endString += '-' ; } else { endString += '+' ; } endString += ( '00' + Math . abs ( startDate . getTZHours ( ) ) ) . substr ( - 2 , 2 ) ; endString += ':' + ( '00' + Math . abs ( startDate . getTZMinutes ( ) ) ) . substr ( - 2 , 2 ) ; } if ( duration . getSeconds ( ) ) { end . seconds += duration . getSeconds ( ) ; } while ( end . seconds && end . seconds >= 60 ) { end . seconds -= 60 ; end . minutes += 1 ; } if ( end . seconds != undefined ) { endString = ':' + ( '00' + end . seconds ) . substr ( - 2 , 2 ) + endString ; } if ( duration . getMinutes ( ) ) { end . minutes += duration . getMinutes ( ) ; } while ( end . minutes && end . minutes >= 60 ) { end . minutes -= 60 ; end . hours += 1 ; } if ( end . minutes != undefined ) { endString = ':' + ( '00' + end . minutes ) . substr ( - 2 , 2 ) + endString ; } if ( duration . getHours ( ) ) { end . hours += duration . getHours ( ) ; } while ( end . hours && end . hours >= 24 ) { end . hours -= 24 ; end . day += 1 ; } if ( end . hours != undefined ) { endString = 'T' + ( '00' + end . hours ) . substr ( - 2 , 2 ) + endString ; } if ( duration . getDays ( ) ) { end . day += duration . getDays ( ) ; } while ( end . day && end . day > GlobalUtil . daysInMonth ( end . month , end . year ) ) { end . month += 1 ; if ( end . month > 12 ) { end . month -= 12 ; end . year += 1 ; } end . day -= GlobalUtil . daysInMonth ( end . month , end . year ) ; } if ( end . day != undefined ) { endString = '-' + ( '00' + end . day ) . substr ( - 2 , 2 ) + endString ; } if ( duration . getMonths ( ) ) { end . month += duration . getMonths ( ) ; } while ( end . month && end . month > 12 ) { end . month -= 12 ; end . year += 1 ; } if ( end . month != undefined ) { endString = '-' + ( '00' + end . month ) . substr ( - 2 , 2 ) + endString ; } if ( duration . getYears ( ) ) { end . year += duration . getYears ( ) ; } if ( end . year != undefined ) { endString = ( '0000' + Math . abs ( end . year ) ) . substr ( - 4 , 4 ) + endString ; if ( end . year < 0 ) { endString = '-' + endString ; } else { endString = '+' + endString ; } } // After adding year we could have bumped into a non leap year // TODO fix this if ( end . year > 9999 ) { throw new Error ( 'New date out of range' ) ; } // TODO return actual simple or approximate dates if ( startDate . isApproximate ( ) ) { endString = 'A' + endString ; return new Approximate ( endString ) ; } else { return new Simple ( endString ) ; } }
Adds a duration to a date, returning the new date.
Adds a duration to a date returning the new date .