[wxWidgets.git] / src / common / date.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        date.cpp
// Purpose:     wxDate class
// Author:
//    Originally inspired by Steve Marcus (CIS 72007,1233)  6/16/91
//    Enhanced by Eric Simon (CIS 70540,1522)               6/29/91
//    Further Enhanced by Chris Hill (CIS 72030,2606)       7/11/91
//    Still Further Enhanced by Hill & Simon  v3.10         8/05/91
//    Version 4 by Charles D. Price                         6/27/92
//    Integrated into wxWindows by Julian Smart             9th July 1995
// Modified by:	
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "date.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/setup.h"

#if wxUSE_TIMEDATE

#include "wx/date.h"
#include <wx/intl.h>

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#if wxUSE_IOSTREAMH
#include <iostream.h>
#else
#include <iostream>
#endif

#include <time.h>
#include <string.h>

#define ABBR_LENGTH 3

static const char *dayname[] = {
  "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
};

static const char *mname[] = {
  "January", "February", "March", "April", "May", "June", "July", "August",
  "September", "October", "November", "December"
};

static int GauDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxDate, wxObject)
#endif

////////////////////////////////////////////////////////////
// Constructors
////////////////////////////////////////////////////////////

wxDate::wxDate()
{
  DisplayFormat=wxMDY;
  DisplayOptions='\0';
  month = day = year = day_of_week = 0;
  julian = 0;
}

wxDate::wxDate (long j) : julian(j)
{
  DisplayFormat=wxMDY;
  DisplayOptions='\0';
  julian_to_mdy ();
}

wxDate::wxDate (int m, int d, int y) : month(m), day(d), year(y)
{
  DisplayFormat=wxMDY;
  DisplayOptions='\0';
  mdy_to_julian ();
}

wxDate::wxDate (const wxString& dat)
{
  DisplayFormat=wxMDY;
  DisplayOptions='\0';
  if (strcmp(dat, "TODAY") == 0 || strcmp(dat, "today") == 0)
  {
    // Sets the current date
    Set();
  }
  else
  {
    char buf[100];
    strcpy(buf, (char *) (const char *)dat);

    char *token = strtok(buf,"/-");
    month = atoi(token);
    day   = atoi(strtok((char *) NULL,"/-"));
    year  = atoi(strtok((char *) NULL," "));
  }

  mdy_to_julian ();
}

wxDate::wxDate (const wxDate &dt)
{
  DisplayFormat=dt.DisplayFormat;
  DisplayOptions=dt.DisplayOptions;
  month = dt.month;
  day   = dt.day;
  year  = dt.year;
  mdy_to_julian ();
}

void wxDate::operator = (const wxDate &dt)
{
  DisplayFormat=dt.DisplayFormat;
  DisplayOptions=dt.DisplayOptions;
  month = dt.month;
  day   = dt.day;
  year  = dt.year;
  mdy_to_julian ();
}

void wxDate::operator = (const wxString& dat)
{
  DisplayFormat=wxMDY;
  DisplayOptions='\0';
  if (strcmp(dat, "TODAY") == 0 || strcmp(dat, "today") == 0)
  {
    // Sets the current date
    Set();
  }
  else
  {
    char buf[100];
    strcpy(buf, (char *)(const char *)dat);

    char *token = strtok(buf,"/-");
    month = atoi(token);
    day   = atoi(strtok((char *) NULL,"/-"));
    year  = atoi(strtok((char *) NULL," "));
  }

  mdy_to_julian ();
}

//////////////////////////////////////////////////////////////
// Conversion operations
//////////////////////////////////////////////////////////////

#ifndef __SALFORDC__
wxDate::operator wxString( void )
{
  return FormatDate();
}
#endif

//////////////////////////////////////////////////////////////
// Date Arithmetic
//////////////////////////////////////////////////////////////

wxDate wxDate::operator + (long i)
{
  wxDate dp(julian + i);
  return dp;
}

wxDate wxDate::operator + (int i)
{
  wxDate dp(julian + (long)i);
  return dp;
}

wxDate wxDate::operator - (long i)
{
  wxDate dp(julian - i);
  return dp;
}

wxDate wxDate::operator - (int i)
{
  wxDate dp(julian - (long)i);
  return dp;
}

long wxDate::operator - (const wxDate &dt)
{
	return ( julian - dt.julian );
}

wxDate &wxDate::operator += (long i)
{
	 julian += i;
     julian_to_mdy();
	 return *this;
}

wxDate &wxDate::operator -= (long i)
{
	 julian -= i;
     julian_to_mdy();
	 return *this;
}

wxDate &wxDate::operator ++()
{
	julian++;
    julian_to_mdy();
	return *this;
}

wxDate &wxDate::operator ++(int)
{
	julian++;
    julian_to_mdy();
	return *this;
}

wxDate &wxDate::operator --()
{
	julian--;
    julian_to_mdy();
	return *this;
}

wxDate &wxDate::operator --(int)
{
	julian--;
    julian_to_mdy();
	return *this;
}

//////////////////////////////////////////////////////////////
// Date comparison
//////////////////////////////////////////////////////////////

bool WXDLLEXPORT operator <  (const wxDate &dt1, const wxDate &dt2)
{
	return ( dt1.julian < dt2.julian );
}

bool WXDLLEXPORT operator <= (const wxDate &dt1, const wxDate &dt2)
{
	return ( (dt1.julian == dt2.julian) || (dt1.julian < dt2.julian) );
}

bool WXDLLEXPORT operator >  (const wxDate &dt1, const wxDate &dt2)
{
	return ( dt1.julian > dt2.julian );
}

bool WXDLLEXPORT operator >= (const wxDate &dt1, const wxDate &dt2)
{
	return ( (dt1.julian == dt2.julian) || (dt1.julian > dt2.julian) );
}

bool WXDLLEXPORT operator == (const wxDate &dt1, const wxDate &dt2)
{
	return ( dt1.julian == dt2.julian );
}

bool WXDLLEXPORT operator != (const wxDate &dt1, const wxDate &dt2)
{
	return ( dt1.julian != dt2.julian );
}

////////////////////////////////////////////////////////////////
// Ostream operations
////////////////////////////////////////////////////////////////

ostream WXDLLEXPORT & operator << (ostream &os, const wxDate &dt)
{
	return os << (const char *) dt.FormatDate();
}

//////////////////////////////////////////////////////////////
// Conversion routines
//////////////////////////////////////////////////////////////

void wxDate::julian_to_wday (void)
{
	day_of_week = (int) ((julian + 2) % 7 + 1);
}

void wxDate::julian_to_mdy ()
{
	long a,b,c,d,e,z,alpha;
	z = julian+1;
	// dealing with Gregorian calendar reform
    if (z < 2299161L)
       a = z;
    else {
       alpha = (long) ((z-1867216.25) / 36524.25);
       a = z + 1 + alpha - alpha/4;
    }
	b = ( a > 1721423 ? a + 1524 : a + 1158 );
	c = (long) ((b - 122.1) / 365.25);
	d = (long) (365.25 * c);
	e = (long) ((b - d) / 30.6001);
    day = (int)(b - d - (long)(30.6001 * e));
    month = (int)((e < 13.5) ? e - 1 : e - 13);
    year = (int)((month > 2.5 ) ? (c - 4716) : c - 4715);
	julian_to_wday ();
}

void wxDate::mdy_to_julian (void)
{
	int a,b=0;
	int work_month=month, work_day=day, work_year=year;
	// correct for negative year
    if (work_year < 0)
		work_year++;
	if (work_month <= 2)
		{ work_year--; work_month +=12; }

	// deal with Gregorian calendar
	if (work_year*10000. + work_month*100. + work_day >= 15821015.)
		{
        a = (int)(work_year/100.);
		b = 2 - a + a/4;
		}
	julian = (long) (365.25*work_year) +
			 (long) (30.6001 * (work_month+1))  +  work_day + 1720994L + b;
	julian_to_wday ();
}

////////////////////////////////////////////////////////////////
// Format routine
////////////////////////////////////////////////////////////////

wxString wxDate::FormatDate (int type) const
{
  int actualType = type;
  if (actualType == -1)
    actualType = DisplayFormat;

    char buf[40];

    memset( buf, '\0', sizeof(buf) );
	switch ( actualType )
	{
		case wxDAY:
			if ( (day_of_week < 1) || (day_of_week > 7) )
				strcpy(buf, _("invalid day"));
			else
				strncpy( buf, _(dayname[day_of_week-1]),
					(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
			return wxString(buf);

		case wxMONTH:
			if ( (month < 1) || (month > 12) )
				strcpy(buf, _("invalid month"));
			else
				strncpy( buf, _(mname[month-1]),
					(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
			return wxString(buf);

		case wxFULL:
			if ( (month < 1) || (month > 12) || (day_of_week < 0) ||
				 (day_of_week > 7) )
			{
				strcpy(buf, _("invalid date"));
				return wxString(buf);
			}
			strncpy( buf, _(dayname[day_of_week-1]),
				(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
			strcat( buf, ", ");
			strncat( buf, _(mname[month-1]),
				(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
			strcat( buf, " ");
			sprintf( buf+strlen(buf), "%d, %d", day, abs(year) );
			if (year < 0)
				strcat(buf,_(" B.C."));
			return wxString(buf);

		case wxEUROPEAN:
			if ( (month < 1) || (month > 12) || (day_of_week < 0) ||
				 (day_of_week > 7) )
			{
				strcpy(buf, _("invalid date"));
				return wxString(buf);
			}
			sprintf(buf,"%d ",	day);
			strncat(buf, _(mname[month-1]),
				(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
			sprintf( buf+strlen(buf), " %d", abs(year) );
			if (year < 0)
				strcat(buf, _(" B.C."));
			return wxString(buf);

		case wxMDY:
		default:
			if (day==0 || month==0 || year==0)
				strcpy(buf, _("invalid date"));
			else
				sprintf( buf+strlen(buf), "%1d/%1d/%02d", month, day,
					(DisplayOptions & wxNO_CENTURY) && (abs(year) > 1899)
					? (abs(year) - (abs(year) / 100 * 100))
					: (abs(year))  );
			return wxString(buf);
	}
  return wxString("");
}

void wxDate::SetFormat( int format )
{
	DisplayFormat = format;
}

int wxDate::SetOption( int option, bool action )
{
	switch ( option )
	{
		case wxNO_CENTURY:
			if ( action )
				DisplayOptions |= wxNO_CENTURY;
			else
			{
				DisplayOptions &= (~wxNO_CENTURY);
			}
			return 1;
		case wxDATE_ABBR:
			if ( action )
				DisplayOptions |= wxDATE_ABBR;
			else
			{
				DisplayOptions &= (~wxDATE_ABBR);
			}
			return 1;
		default:
			return 0;
	}
  return 0;
}

///////////////////////////////////////////////////////////////
//  Miscellaneous Routines
///////////////////////////////////////////////////////////////

long wxDate::GetJulianDate( void ) const
{
	return julian;
}

int wxDate::GetDayOfYear( void ) const
{
	wxDate temp( 1, 1, year );

	return (int) (julian - temp.julian + 1);
}


bool wxDate::IsLeapYear( void ) const
{
	return  ( (year >= 1582) ?
			  (year % 4 == 0  &&  year % 100 != 0  ||  year % 400 == 0 ):
			  (year % 4 == 0) );
}

// Version 4.0 Extension to Public Interface - CDP

wxDate& wxDate::Set()
{
//#ifdef __WXMSW__
#if 0
    struct _dosdate_t sDate;
    _dos_getdate(&sDate);

    month = sDate.month;
    day   = sDate.day;
    year  = sDate.year;

    mdy_to_julian();
#else
    time_t now = time((time_t *) NULL);
    struct tm *localTime = localtime(&now);

    month = localTime->tm_mon + 1;
    day = localTime->tm_mday;
    year = localTime->tm_year + 1900;

    mdy_to_julian ();
#endif
    return *this;
}

wxDate& wxDate::Set(
	int	nMonth,
	int	nDay,
	int	nYear)
{
    month = nMonth;
    year  = nYear < 0 ? 9999 : nYear;
    year  = nYear > 9999 ? 0 : nYear;
    day   = nDay < GetDaysInMonth() ? nDay : GetDaysInMonth();

    mdy_to_julian();
	return *this;
}

wxDate &
wxDate::Set(long j)
{
  julian = j;

  julian_to_mdy();
  return *this;
}


int wxDate::GetDaysInMonth()
{
    return GauDays[month-1] + (month==2 && IsLeapYear());
}

int wxDate::GetFirstDayOfMonth() const
{
    return wxDate(month, 1, year).GetDayOfWeek();
}

int wxDate::GetDay() const
{
    return day;
}

int wxDate::GetDayOfWeek() const
{
    return day_of_week;
}

int wxDate::GetYear() const
{
    return year;
}

int wxDate::GetMonth() const
{
    return month;
}

wxDate& wxDate::AddWeeks(int nCount)
{
    Set(julian + (long)nCount*7);
    return *this;
}

wxDate& wxDate::AddMonths(int nCount)
{
    month += nCount;

    if (month < 1) {
        month = 12;
        year--;
	}

    if (month > 12) {
        month = 1;
        year++;
	}
    mdy_to_julian();
    return *this;
}

wxDate& wxDate::AddYears(int nCount)
{
    year += nCount;
    mdy_to_julian();
    return *this;
}

int wxDate::GetWeekOfMonth()
{
  // Abs day includes the days from previous month that fills up
  // the begin. of the week.
  int nAbsDay = day + GetFirstDayOfMonth()-1;
  return (nAbsDay-GetDayOfWeek())/7 + 1;
}

int wxDate::GetWeekOfYear()
{
    wxDate   doTemp(1, 1, year);
    return (int)(((julian - doTemp.julian+1)/7) + 1);
}

wxDate wxDate::GetMonthStart()
{
    return(wxDate(month, 1, year));
}

wxDate wxDate::GetMonthEnd()
{
    return(wxDate(month+1, 1, year)-1);
}

wxDate wxDate::GetYearStart()
{
    return(wxDate(1, 1, year));
}

wxDate wxDate::GetYearEnd()
{
    return(wxDate(1, 1, year+1)-1);
}

wxString wxDate::GetMonthName()
{
    return(FormatDate(wxMONTH));
}

wxString wxDate::GetDayOfWeekName()
{
    return(FormatDate(wxDAY));
}

bool wxDate::IsBetween(const wxDate& first, const wxDate& second) const
{
  return (julian >= first.julian && julian <= second.julian);
}

// This function is from NIHCL
wxDate wxDate::Previous(int dayOfWeek) const
{
        int this_day_Of_Week, desired_day_Of_Week;
        long j;

//      Set the desired and current day of week to start at 0 (Monday)
//      and end at 6 (Sunday).

        desired_day_Of_Week = dayOfWeek - 1; // These functions return a value
        this_day_Of_Week    = GetDayOfWeek() - 1;            // from 1-7.  Subtract 1 for 0-6.
        j = julian;

//      Have to determine how many days difference from current day back to
//      desired, if any.  Special calculation under the 'if' statement to
//      effect the wraparound counting from Monday (0) back to Sunday (6).

        if (desired_day_Of_Week > this_day_Of_Week)
                this_day_Of_Week += 7 - desired_day_Of_Week;
        else
                this_day_Of_Week -= desired_day_Of_Week;
        j -= this_day_Of_Week; // Adjust j to set it at the desired day of week.
        return wxDate(j);
}

#endif
Commit	Line	Data
c801d85f KB	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: date.cpp
	3	// Purpose: wxDate class
	4	// Author:
	5	// Originally inspired by Steve Marcus (CIS 72007,1233) 6/16/91
	6	// Enhanced by Eric Simon (CIS 70540,1522) 6/29/91
	7	// Further Enhanced by Chris Hill (CIS 72030,2606) 7/11/91
	8	// Still Further Enhanced by Hill & Simon v3.10 8/05/91
	9	// Version 4 by Charles D. Price 6/27/92
	10	// Integrated into wxWindows by Julian Smart 9th July 1995
	11	// Modified by:
	12	// Created: 01/02/97
	13	// RCS-ID: $Id$
	14	// Copyright: (c) Julian Smart and Markus Holzem
	15	// Licence: wxWindows licence
	16	/////////////////////////////////////////////////////////////////////////////
	17
	18	#ifdef __GNUG__
	19	#pragma implementation "date.h"
	20	#endif
	21
	22	// For compilers that support precompilation, includes "wx.h".
	23	#include "wx/wxprec.h"
	24
	25	#ifdef __BORLANDC__
	26	#pragma hdrstop
	27	#endif
	28
	29	#include "wx/setup.h"
	30
9838df2c	31	#if wxUSE_TIMEDATE
c801d85f KB	32
c801d85f KB	33	#include "wx/date.h"
1a5a8367	34	#include <wx/intl.h>
c801d85f KB	35
	36	#include <stdio.h>
	37	#include <string.h>
	38	#include <stdlib.h>
	39
47d67540	40	#if wxUSE_IOSTREAMH
c801d85f KB	41	#include <iostream.h>
	42	#else
	43	#include <iostream>
	44	#endif
	45
	46	#include <time.h>
	47	#include <string.h>
	48
	49	#define ABBR_LENGTH 3
	50
1a5a8367 DP	51	static const char *dayname[] = {
	52	"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
	53	};
c801d85f	54
1a5a8367 DP	55	static const char *mname[] = {
	56	"January", "February", "March", "April", "May", "June", "July", "August",
	57	"September", "October", "November", "December"
	58	};
c801d85f KB	59
	60	static int GauDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	61
	62	#if !USE_SHARED_LIBRARY
	63	IMPLEMENT_DYNAMIC_CLASS(wxDate, wxObject)
	64	#endif
	65
	66	////////////////////////////////////////////////////////////
	67	// Constructors
	68	////////////////////////////////////////////////////////////
	69
	70	wxDate::wxDate()
	71	{
	72	DisplayFormat=wxMDY;
	73	DisplayOptions='\0';
	74	month = day = year = day_of_week = 0;
	75	julian = 0;
	76	}
	77
debe6624	78	wxDate::wxDate (long j) : julian(j)
c801d85f KB	79	{
	80	DisplayFormat=wxMDY;
	81	DisplayOptions='\0';
	82	julian_to_mdy ();
	83	}
	84
debe6624	85	wxDate::wxDate (int m, int d, int y) : month(m), day(d), year(y)
c801d85f KB	86	{
	87	DisplayFormat=wxMDY;
	88	DisplayOptions='\0';
	89	mdy_to_julian ();
	90	}
	91
	92	wxDate::wxDate (const wxString& dat)
	93	{
	94	DisplayFormat=wxMDY;
	95	DisplayOptions='\0';
	96	if (strcmp(dat, "TODAY") == 0 \|\| strcmp(dat, "today") == 0)
	97	{
	98	// Sets the current date
	99	Set();
	100	}
	101	else
	102	{
	103	char buf[100];
	104	strcpy(buf, (char ) (const char )dat);
	105
	106	char *token = strtok(buf,"/-");
	107	month = atoi(token);
c67daf87 UR	108	day = atoi(strtok((char *) NULL,"/-"));
c67daf87 UR	109	year = atoi(strtok((char *) NULL," "));
c801d85f KB	110	}
	111
	112	mdy_to_julian ();
	113	}
	114
	115	wxDate::wxDate (const wxDate &dt)
	116	{
	117	DisplayFormat=dt.DisplayFormat;
	118	DisplayOptions=dt.DisplayOptions;
	119	month = dt.month;
	120	day = dt.day;
	121	year = dt.year;
	122	mdy_to_julian ();
	123	}
	124
	125	void wxDate::operator = (const wxDate &dt)
	126	{
	127	DisplayFormat=dt.DisplayFormat;
	128	DisplayOptions=dt.DisplayOptions;
	129	month = dt.month;
	130	day = dt.day;
	131	year = dt.year;
	132	mdy_to_julian ();
	133	}
	134
	135	void wxDate::operator = (const wxString& dat)
	136	{
	137	DisplayFormat=wxMDY;
	138	DisplayOptions='\0';
	139	if (strcmp(dat, "TODAY") == 0 \|\| strcmp(dat, "today") == 0)
	140	{
	141	// Sets the current date
	142	Set();
	143	}
	144	else
	145	{
	146	char buf[100];
	147	strcpy(buf, (char )(const char )dat);
	148
	149	char *token = strtok(buf,"/-");
	150	month = atoi(token);
c67daf87 UR	151	day = atoi(strtok((char *) NULL,"/-"));
c67daf87 UR	152	year = atoi(strtok((char *) NULL," "));
c801d85f KB	153	}
	154
	155	mdy_to_julian ();
	156	}
	157
	158	//////////////////////////////////////////////////////////////
	159	// Conversion operations
	160	//////////////////////////////////////////////////////////////
	161
ce3ed50d	162	#ifndef __SALFORDC__
c801d85f KB	163	wxDate::operator wxString( void )
	164	{
	165	return FormatDate();
	166	}
ce3ed50d	167	#endif
c801d85f KB	168
	169	//////////////////////////////////////////////////////////////
	170	// Date Arithmetic
	171	//////////////////////////////////////////////////////////////
	172
debe6624	173	wxDate wxDate::operator + (long i)
c801d85f KB	174	{
	175	wxDate dp(julian + i);
	176	return dp;
	177	}
	178
debe6624	179	wxDate wxDate::operator + (int i)
c801d85f KB	180	{
	181	wxDate dp(julian + (long)i);
	182	return dp;
	183	}
	184
debe6624	185	wxDate wxDate::operator - (long i)
c801d85f KB	186	{
	187	wxDate dp(julian - i);
	188	return dp;
	189	}
	190
debe6624	191	wxDate wxDate::operator - (int i)
c801d85f KB	192	{
	193	wxDate dp(julian - (long)i);
	194	return dp;
	195	}
	196
	197	long wxDate::operator - (const wxDate &dt)
	198	{
	199	return ( julian - dt.julian );
	200	}
	201
debe6624	202	wxDate &wxDate::operator += (long i)
c801d85f KB	203	{
	204	julian += i;
	205	julian_to_mdy();
	206	return *this;
	207	}
	208
debe6624	209	wxDate &wxDate::operator -= (long i)
c801d85f KB	210	{
	211	julian -= i;
	212	julian_to_mdy();
	213	return *this;
	214	}
	215
	216	wxDate &wxDate::operator ++()
	217	{
	218	julian++;
	219	julian_to_mdy();
	220	return *this;
	221	}
	222
	223	wxDate &wxDate::operator ++(int)
	224	{
	225	julian++;
	226	julian_to_mdy();
	227	return *this;
	228	}
	229
	230	wxDate &wxDate::operator --()
	231	{
	232	julian--;
	233	julian_to_mdy();
	234	return *this;
	235	}
	236
	237	wxDate &wxDate::operator --(int)
	238	{
	239	julian--;
	240	julian_to_mdy();
	241	return *this;
	242	}
	243
	244	//////////////////////////////////////////////////////////////
	245	// Date comparison
	246	//////////////////////////////////////////////////////////////
	247
a4abc0fc	248	bool WXDLLEXPORT operator < (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	249	{
	250	return ( dt1.julian < dt2.julian );
	251	}
	252
a4abc0fc	253	bool WXDLLEXPORT operator <= (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	254	{
	255	return ( (dt1.julian == dt2.julian) \|\| (dt1.julian < dt2.julian) );
	256	}
	257
a4abc0fc	258	bool WXDLLEXPORT operator > (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	259	{
	260	return ( dt1.julian > dt2.julian );
	261	}
	262
a4abc0fc	263	bool WXDLLEXPORT operator >= (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	264	{
	265	return ( (dt1.julian == dt2.julian) \|\| (dt1.julian > dt2.julian) );
	266	}
	267
a4abc0fc	268	bool WXDLLEXPORT operator == (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	269	{
	270	return ( dt1.julian == dt2.julian );
	271	}
	272
a4abc0fc	273	bool WXDLLEXPORT operator != (const wxDate &dt1, const wxDate &dt2)
c801d85f KB	274	{
	275	return ( dt1.julian != dt2.julian );
	276	}
	277
	278	////////////////////////////////////////////////////////////////
	279	// Ostream operations
	280	////////////////////////////////////////////////////////////////
	281
ba681060	282	ostream WXDLLEXPORT & operator << (ostream &os, const wxDate &dt)
c801d85f KB	283	{
	284	return os << (const char *) dt.FormatDate();
	285	}
	286
	287	//////////////////////////////////////////////////////////////
	288	// Conversion routines
	289	//////////////////////////////////////////////////////////////
	290
	291	void wxDate::julian_to_wday (void)
	292	{
	293	day_of_week = (int) ((julian + 2) % 7 + 1);
	294	}
	295
	296	void wxDate::julian_to_mdy ()
	297	{
	298	long a,b,c,d,e,z,alpha;
	299	z = julian+1;
	300	// dealing with Gregorian calendar reform
	301	if (z < 2299161L)
	302	a = z;
	303	else {
	304	alpha = (long) ((z-1867216.25) / 36524.25);
	305	a = z + 1 + alpha - alpha/4;
	306	}
	307	b = ( a > 1721423 ? a + 1524 : a + 1158 );
	308	c = (long) ((b - 122.1) / 365.25);
	309	d = (long) (365.25 * c);
	310	e = (long) ((b - d) / 30.6001);
	311	day = (int)(b - d - (long)(30.6001 * e));
	312	month = (int)((e < 13.5) ? e - 1 : e - 13);
	313	year = (int)((month > 2.5 ) ? (c - 4716) : c - 4715);
	314	julian_to_wday ();
	315	}
	316
	317	void wxDate::mdy_to_julian (void)
	318	{
	319	int a,b=0;
	320	int work_month=month, work_day=day, work_year=year;
	321	// correct for negative year
	322	if (work_year < 0)
	323	work_year++;
	324	if (work_month <= 2)
	325	{ work_year--; work_month +=12; }
	326
	327	// deal with Gregorian calendar
	328	if (work_year10000. + work_month100. + work_day >= 15821015.)
	329	{
	330	a = (int)(work_year/100.);
	331	b = 2 - a + a/4;
	332	}
	333	julian = (long) (365.25*work_year) +
	334	(long) (30.6001 * (work_month+1)) + work_day + 1720994L + b;
	335	julian_to_wday ();
	336	}
	337
	338	////////////////////////////////////////////////////////////////
	339	// Format routine
	340	////////////////////////////////////////////////////////////////
	341
debe6624	342	wxString wxDate::FormatDate (int type) const
c801d85f KB	343	{
	344	int actualType = type;
	345	if (actualType == -1)
	346	actualType = DisplayFormat;
	347
	348	char buf[40];
	349
	350	memset( buf, '\0', sizeof(buf) );
	351	switch ( actualType )
	352	{
	353	case wxDAY:
	354	if ( (day_of_week < 1) \|\| (day_of_week > 7) )
1a5a8367	355	strcpy(buf, _("invalid day"));
c801d85f	356	else
1a5a8367	357	strncpy( buf, _(dayname[day_of_week-1]),
c801d85f KB	358	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	359	return wxString(buf);
	360
	361	case wxMONTH:
	362	if ( (month < 1) \|\| (month > 12) )
1a5a8367	363	strcpy(buf, _("invalid month"));
c801d85f	364	else
1a5a8367	365	strncpy( buf, _(mname[month-1]),
c801d85f KB	366	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	367	return wxString(buf);
	368
	369	case wxFULL:
	370	if ( (month < 1) \|\| (month > 12) \|\| (day_of_week < 0) \|\|
	371	(day_of_week > 7) )
	372	{
1a5a8367	373	strcpy(buf, _("invalid date"));
c801d85f KB	374	return wxString(buf);
c801d85f KB	375	}
1a5a8367	376	strncpy( buf, _(dayname[day_of_week-1]),
c801d85f KB	377	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
c801d85f KB	378	strcat( buf, ", ");
1a5a8367	379	strncat( buf, _(mname[month-1]),
c801d85f KB	380	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	381	strcat( buf, " ");
	382	sprintf( buf+strlen(buf), "%d, %d", day, abs(year) );
	383	if (year < 0)
1a5a8367	384	strcat(buf,_(" B.C."));
c801d85f KB	385	return wxString(buf);
	386
	387	case wxEUROPEAN:
	388	if ( (month < 1) \|\| (month > 12) \|\| (day_of_week < 0) \|\|
	389	(day_of_week > 7) )
	390	{
1a5a8367	391	strcpy(buf, _("invalid date"));
c801d85f KB	392	return wxString(buf);
	393	}
	394	sprintf(buf,"%d ", day);
1a5a8367	395	strncat(buf, _(mname[month-1]),
c801d85f KB	396	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	397	sprintf( buf+strlen(buf), " %d", abs(year) );
	398	if (year < 0)
1a5a8367	399	strcat(buf, _(" B.C."));
c801d85f KB	400	return wxString(buf);
	401
	402	case wxMDY:
	403	default:
	404	if (day==0 \|\| month==0 \|\| year==0)
1a5a8367	405	strcpy(buf, _("invalid date"));
c801d85f KB	406	else
	407	sprintf( buf+strlen(buf), "%1d/%1d/%02d", month, day,
	408	(DisplayOptions & wxNO_CENTURY) && (abs(year) > 1899)
	409	? (abs(year) - (abs(year) / 100 * 100))
	410	: (abs(year)) );
	411	return wxString(buf);
	412	}
	413	return wxString("");
	414	}
	415
debe6624	416	void wxDate::SetFormat( int format )
c801d85f KB	417	{
	418	DisplayFormat = format;
	419	}
	420
debe6624	421	int wxDate::SetOption( int option, bool action )
c801d85f KB	422	{
	423	switch ( option )
	424	{
	425	case wxNO_CENTURY:
	426	if ( action )
	427	DisplayOptions \|= wxNO_CENTURY;
	428	else
	429	{
	430	DisplayOptions &= (~wxNO_CENTURY);
	431	}
	432	return 1;
	433	case wxDATE_ABBR:
	434	if ( action )
	435	DisplayOptions \|= wxDATE_ABBR;
	436	else
	437	{
	438	DisplayOptions &= (~wxDATE_ABBR);
	439	}
	440	return 1;
	441	default:
	442	return 0;
	443	}
	444	return 0;
	445	}
	446
	447	///////////////////////////////////////////////////////////////
	448	// Miscellaneous Routines
	449	///////////////////////////////////////////////////////////////
	450
	451	long wxDate::GetJulianDate( void ) const
	452	{
	453	return julian;
	454	}
	455
	456	int wxDate::GetDayOfYear( void ) const
	457	{
	458	wxDate temp( 1, 1, year );
	459
	460	return (int) (julian - temp.julian + 1);
	461	}
	462
	463
	464	bool wxDate::IsLeapYear( void ) const
	465	{
	466	return ( (year >= 1582) ?
	467	(year % 4 == 0 && year % 100 != 0 \|\| year % 400 == 0 ):
	468	(year % 4 == 0) );
	469	}
	470
	471	// Version 4.0 Extension to Public Interface - CDP
	472
	473	wxDate& wxDate::Set()
	474	{
2049ba38	475	//#ifdef __WXMSW__
c801d85f KB	476	#if 0
	477	struct _dosdate_t sDate;
	478	_dos_getdate(&sDate);
	479
	480	month = sDate.month;
	481	day = sDate.day;
	482	year = sDate.year;
	483
	484	mdy_to_julian();
	485	#else
c67daf87	486	time_t now = time((time_t *) NULL);
c801d85f KB	487	struct tm *localTime = localtime(&now);
	488
	489	month = localTime->tm_mon + 1;
	490	day = localTime->tm_mday;
	491	year = localTime->tm_year + 1900;
	492
	493	mdy_to_julian ();
	494	#endif
	495	return *this;
	496	}
	497
	498	wxDate& wxDate::Set(
	499	int nMonth,
	500	int nDay,
	501	int nYear)
	502	{
	503	month = nMonth;
	504	year = nYear < 0 ? 9999 : nYear;
	505	year = nYear > 9999 ? 0 : nYear;
	506	day = nDay < GetDaysInMonth() ? nDay : GetDaysInMonth();
	507
	508	mdy_to_julian();
	509	return *this;
	510	}
	511
	512	wxDate &
	513	wxDate::Set(long j)
	514	{
	515	julian = j;
	516
	517	julian_to_mdy();
	518	return *this;
	519	}
	520
	521
	522	int wxDate::GetDaysInMonth()
	523	{
	524	return GauDays[month-1] + (month==2 && IsLeapYear());
	525	}
	526
	527	int wxDate::GetFirstDayOfMonth() const
	528	{
	529	return wxDate(month, 1, year).GetDayOfWeek();
	530	}
	531
	532	int wxDate::GetDay() const
	533	{
	534	return day;
	535	}
	536
	537	int wxDate::GetDayOfWeek() const
	538	{
	539	return day_of_week;
	540	}
	541
	542	int wxDate::GetYear() const
	543	{
	544	return year;
	545	}
	546
	547	int wxDate::GetMonth() const
	548	{
	549	return month;
	550	}
551
552	wxDate& wxDate::AddWeeks(int nCount)
553	{
554	Set(julian + (long)nCount*7);
555	return *this;
556	}
557
558	wxDate& wxDate::AddMonths(int nCount)
559	{
560	month += nCount;
561
562	if (month < 1) {
563	month = 12;
564	year--;
565	}
566
567	if (month > 12) {
568	month = 1;
569	year++;
570	}
571	mdy_to_julian();
572	return *this;
573	}
574
575	wxDate& wxDate::AddYears(int nCount)
576	{
577	year += nCount;
578	mdy_to_julian();
579	return *this;
580	}
581
582	int wxDate::GetWeekOfMonth()
583	{
584	// Abs day includes the days from previous month that fills up
585	// the begin. of the week.
586	int nAbsDay = day + GetFirstDayOfMonth()-1;
587	return (nAbsDay-GetDayOfWeek())/7 + 1;
588	}
589
590	int wxDate::GetWeekOfYear()
591	{
592	wxDate doTemp(1, 1, year);
593	return (int)(((julian - doTemp.julian+1)/7) + 1);
594	}
595
596	wxDate wxDate::GetMonthStart()
597	{
598	return(wxDate(month, 1, year));
599	}
600
601	wxDate wxDate::GetMonthEnd()
602	{
603	return(wxDate(month+1, 1, year)-1);
604	}
605
606	wxDate wxDate::GetYearStart()
607	{
608	return(wxDate(1, 1, year));
609	}
610
611	wxDate wxDate::GetYearEnd()
612	{
613	return(wxDate(1, 1, year+1)-1);
614	}
615
616	wxString wxDate::GetMonthName()
617	{
618	return(FormatDate(wxMONTH));
619	}
620
621	wxString wxDate::GetDayOfWeekName()
622	{
623	return(FormatDate(wxDAY));
624	}
625
626	bool wxDate::IsBetween(const wxDate& first, const wxDate& second) const
627	{
628	return (julian >= first.julian && julian <= second.julian);
629	}
630
631	// This function is from NIHCL
debe6624	632	wxDate wxDate::Previous(int dayOfWeek) const
c801d85f KB	633	{
	634	int this_day_Of_Week, desired_day_Of_Week;
	635	long j;
	636
	637	// Set the desired and current day of week to start at 0 (Monday)
	638	// and end at 6 (Sunday).
	639
	640	desired_day_Of_Week = dayOfWeek - 1; // These functions return a value
	641	this_day_Of_Week = GetDayOfWeek() - 1; // from 1-7. Subtract 1 for 0-6.
	642	j = julian;
	643
	644	// Have to determine how many days difference from current day back to
	645	// desired, if any. Special calculation under the 'if' statement to
	646	// effect the wraparound counting from Monday (0) back to Sunday (6).
	647
	648	if (desired_day_Of_Week > this_day_Of_Week)
	649	this_day_Of_Week += 7 - desired_day_Of_Week;
	650	else
	651	this_day_Of_Week -= desired_day_Of_Week;
	652	j -= this_day_Of_Week; // Adjust j to set it at the desired day of week.
	653	return wxDate(j);
	654	}
	655
	656	#endif