datetimeformatter.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// DateTimeFormatter.cpp
//
// $Id: //poco/Main/Foundation/src/DateTimeFormatter.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/DateTimeFormatter.h"
#include "Foundation/DateTimeFormat.h"
#include "Foundation/DateTime.h"
#include "Foundation/Timestamp.h"
#include "Foundation/NumberFormatter.h"


Foundation_BEGIN


std::string DateTimeFormatter::format(const Timestamp& timestamp, const std::string& fmt, int timeZoneDifferential)
{
	DateTime dateTime(timestamp);
	return format(dateTime, fmt, timeZoneDifferential);
}


std::string DateTimeFormatter::format(const DateTime& dateTime, const std::string& fmt, int timeZoneDifferential)
{
	std::string result;
	std::string::const_iterator it  = fmt.begin();
	std::string::const_iterator end = fmt.end();
	while (it != end)
	{
		if (*it == '%')
		{
			if (++it != end)
			{
				switch (*it)
				{
				case 'w': result.append(DateTimeFormat::WEEKDAY_NAMES[dateTime.dayOfWeek()], 0, 3); break;
				case 'W': result.append(DateTimeFormat::WEEKDAY_NAMES[dateTime.dayOfWeek()]); break;
				case 'b': result.append(DateTimeFormat::MONTH_NAMES[dateTime.month() - 1], 0, 3); break;
				case 'B': result.append(DateTimeFormat::MONTH_NAMES[dateTime.month() - 1]); break;
				case 'd': result.append(NumberFormatter::format0(dateTime.day(), 2)); break;
				case 'e': result.append(NumberFormatter::format(dateTime.day())); break;
				case 'f': result.append(NumberFormatter::format(dateTime.day(), 2)); break;
				case 'm': result.append(NumberFormatter::format0(dateTime.month(), 2)); break;
				case 'n': result.append(NumberFormatter::format(dateTime.month())); break;
				case 'o': result.append(NumberFormatter::format(dateTime.month(), 2)); break;
				case 'y': result.append(NumberFormatter::format0(dateTime.year() % 100, 2)); break;
				case 'Y': result.append(NumberFormatter::format0(dateTime.year(), 4)); break;
				case 'H': result.append(NumberFormatter::format0(dateTime.hour(), 2)); break;
				case 'h': result.append(NumberFormatter::format0(dateTime.hourAMPM(), 2)); break;
				case 'a': result.append(dateTime.isAM() ? "am" : "pm"); break;
				case 'A': result.append(dateTime.isAM() ? "AM" : "PM"); break;
				case 'M': result.append(NumberFormatter::format0(dateTime.minute(), 2)); break;
				case 'S': result.append(NumberFormatter::format0(dateTime.second(), 2)); break;
				case 'i': result.append(NumberFormatter::format0(dateTime.millisecond(), 3)); break;
				case 'c': result.append(NumberFormatter::format(dateTime.millisecond()/100)); break;
				case 'z': result.append(tzdISO(timeZoneDifferential)); break;
				case 'Z': result.append(tzdRFC(timeZoneDifferential)); break;
				default:  result += *it;
				}
				++it;
			}
		}
		else result += *it++;
	}
	return result;
}


std::string DateTimeFormatter::tzdISO(int timeZoneDifferential)
{
	std::string tzd;
	if (timeZoneDifferential != UTC)
	{
		if (timeZoneDifferential >= 0)
		{
			tzd += '+';
			tzd += NumberFormatter::format0(timeZoneDifferential/3600, 2);
			tzd += ':';
			tzd += NumberFormatter::format0((timeZoneDifferential%3600)/60, 2);
		}
		else
		{
			tzd += '-';
			tzd += NumberFormatter::format0(-timeZoneDifferential/3600, 2);
			tzd += ':';
			tzd += NumberFormatter::format0((-timeZoneDifferential%3600)/60, 2);
		}
	}
	else tzd = "Z";
	return tzd;
}


std::string DateTimeFormatter::tzdRFC(int timeZoneDifferential)
{
	std::string tzd;
	if (timeZoneDifferential != UTC)
	{
		if (timeZoneDifferential >= 0)
		{
			tzd += '+';
			tzd += NumberFormatter::format0(timeZoneDifferential/3600, 2);
			tzd += NumberFormatter::format0((timeZoneDifferential%3600)/60, 2);
		}
		else
		{
			tzd += '-';
			tzd += NumberFormatter::format0(-timeZoneDifferential/3600, 2);
			tzd += NumberFormatter::format0((-timeZoneDifferential%3600)/60, 2);
		}		
	}
	else tzd = "GMT";
	return tzd;
}


Foundation_END