DateTools.cpp

/**
 * \file
 * \author Karsten Rink
 * \date   2010-06-16
 * \brief  Implementation of date helper functions.
 *
 * \copyright
 * Copyright (c) 2013, OpenGeoSys Community (http://www.opengeosys.org)
 *            Distributed under a Modified BSD License.
 *              See accompanying file LICENSE.txt or
 *              http://www.opengeosys.org/project/license
 *
 */

#include "DateTools.h"

#include <cmath>
#include <cstdlib>
#include <iostream>

// ThirdParty/logog
#include "logog/include/logog.hpp"

namespace BaseLib
{
int date2int(int y, int m, int d)
{
	if ( (y < 1000 || y > 9999) || (m < 1 || m > 12) || (d < 1 || d > 31) )
	{
		WARN("date2int(): Input not in expected range.");
		return 0;
	}

	int ddate(0);
	ddate = y * 10000;
	ddate += (m * 100);
	ddate += d;

	return ddate;
}

std::string int2date(int date)
{
	if (date > 10000000 && date < 22000000)
	{
		int y = static_cast<int>(floor(date / 10000.0));
		int m = static_cast<int>(floor((date - (y * 10000)) / 100.0));
		int d = date - (y * 10000) - (m * 100);
		std::stringstream ss;
		if (d < 10)
			ss << "0";
		ss << d << ".";
		if (m < 10)
			ss << "0";
		ss << m << "." << y;
		return ss.str();
	}
	return "";
}

std::string date2string(double ddate)
{
	if (ddate < 10000101 || ddate > 99991231)
	{
		WARN("date2String(): Input not in expected format.");
		return "0.0.0000";
	}

	int rest (static_cast<int>(ddate));
	int y = static_cast<int>(floor(rest / 10000.0));
	rest = rest % (y * 10000);
	int m = static_cast<int>(floor(rest / 100.0));
	if (m < 1 || m > 12)
		WARN("date2String(): month not in [1:12].");
	rest = rest % (m * 100);
	int d = rest;
	if (d < 1 || d > 31)
		WARN("date2String(): day not in [1:31].");

	std::string day = BaseLib::number2str(d);
	if (d < 10)
		day = "0" + day;
	std::string month = BaseLib::number2str(m);
	if (m < 10)
		month = "0" + month;
	std::string s =  BaseLib::number2str(y) + "-" + month + "-" + day;
	return s;
}

int strDate2int(const std::string &s)
{
	std::string str(s);
	if (s.length() > 10)
		str = s.substr(0,10);
	size_t sep ( str.find(".",0) );
	int d ( atoi(str.substr(0, sep).c_str()) );
	size_t sep2 ( str.find(".", sep + 1) );
	int m ( atoi(str.substr(sep + 1,sep2 - (sep + 1)).c_str()) );
	int y ( atoi(str.substr(sep2 + 1, s.length() - (sep2 + 1)).c_str()) );
	return date2int(y, m, d);
}

int xmlDate2int(const std::string &s)
{
	if (s.length() == 10)
	{
		int d = atoi(s.substr(8,2).c_str());
		if (d < 1 || d > 31)
			WARN("xmlDate2double(): day not in [1:31].");
		int m = atoi(s.substr(5,2).c_str());
		if (m < 1 || m > 12)
			WARN("xmlDate2double(): month not in [1:12].");
		int y = atoi(s.substr(0,4).c_str());
		return date2int(y, m, d);
	}
	return 0;
}
} // end namespace BaseLib