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

#if wxUSE_TIMEDATE

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

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

#include "wx/ioswrap.h"

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

#define ABBR_LENGTH 3

static const wxChar *dayname[] = {
    wxT("Sunday"), wxT("Monday"), wxT("Tuesday"), wxT("Wednesday"),
    wxT("Thursday"), wxT("Friday"), wxT("Saturday")
};

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

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

IMPLEMENT_DYNAMIC_CLASS(wxDate, wxObject)

    ////////////////////////////////////////////////////////////
    // 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 (wxStrcmp(dat, wxT("TODAY")) == 0 || wxStrcmp(dat, wxT("today")) == 0)
    {
        // Sets the current date
        Set();
    }
    else
    {
        wxChar buf[100];
        wxStrcpy(buf, dat);

        wxChar *save_ptr, *token = wxStrtok(buf,wxT("/-"),&save_ptr);
        month = wxAtoi(token);
        day   = wxAtoi(wxStrtok((wxChar *) NULL,wxT("/-"),&save_ptr));
        year  = wxAtoi(wxStrtok((wxChar *) NULL,wxT(" "),&save_ptr));
    }

    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 (); // wxUSE_TIMEDATE
}

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

        wxChar *save_ptr, *token = wxStrtok(buf,wxT("/-"),&save_ptr);
        month = wxAtoi(token);
        day   = wxAtoi(wxStrtok((wxChar *) NULL,wxT("/-"),&save_ptr));
        year  = wxAtoi(wxStrtok((wxChar *) NULL,wxT(" "),&save_ptr));
    }

    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 );
}


#if wxUSE_STD_IOSTREAM

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

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

#endif

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

void wxDate::julian_to_wday (void)
{
    // Correction by Peter Stadel <peters@jetcity.com>
    day_of_week = (int)((julian - 2) % 7L);
/*
    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;

    wxChar buf[40];

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

        case wxMONTH:
            if ( (month < 1) || (month > 12) )
                wxStrcpy(buf, _("invalid month"));
            else
                wxStrncpy( buf, wxGetTranslation(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) )
            {
                wxStrcpy(buf, _("invalid date"));
                return wxString(buf);
            }
            wxStrncpy( buf, wxGetTranslation(dayname[day_of_week-1]),
               (DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
            wxStrcat( buf, wxT(", "));
            wxStrncat( buf, wxGetTranslation(mname[month-1]),
               (DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
            wxStrcat( buf, wxT(" "));
            wxSprintf( buf+wxStrlen(buf), wxT("%d, %d"), day, abs(year) );
            if (year < 0)
                wxStrcat(buf,_(" B.C."));
            return wxString(buf);

        case wxEUROPEAN:
            if ( (month < 1) || (month > 12) || (day_of_week < 0) ||
                    (day_of_week > 7) )
            {
                wxStrcpy(buf, _("invalid date"));
                return wxString(buf);
            }
            wxSprintf(buf,wxT("%d "),  day);
            wxStrncat(buf, wxGetTranslation(mname[month-1]),
                    (DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
            wxSprintf( buf+wxStrlen(buf), wxT(" %d"), abs(year) );
            if (year < 0)
                wxStrcat(buf, _(" B.C."));
            return wxString(buf);

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

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;
    }
}

///////////////////////////////////////////////////////////////
//  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
	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	#if wxUSE_TIMEDATE
	30
	31	#include "wx/date.h"
	32	#include "wx/intl.h"
	33
	34	#include <stdio.h>
	35	#include <string.h>
	36	#include <stdlib.h>
	37
	38	#include "wx/ioswrap.h"
	39
	40	#include <time.h>
	41	#include <string.h>
	42
	43	#define ABBR_LENGTH 3
	44
	45	static const wxChar *dayname[] = {
	46	wxT("Sunday"), wxT("Monday"), wxT("Tuesday"), wxT("Wednesday"),
	47	wxT("Thursday"), wxT("Friday"), wxT("Saturday")
	48	};
	49
	50	static const wxChar *mname[] = {
	51	wxT("January"), wxT("February"), wxT("March"), wxT("April"), wxT("May"), wxT("June"),
	52	wxT("July"), wxT("August"), wxT("September"), wxT("October"), wxT("November"), wxT("December")
	53	};
	54
	55	static int GauDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	56
	57	IMPLEMENT_DYNAMIC_CLASS(wxDate, wxObject)
	58
	59	////////////////////////////////////////////////////////////
	60	// Constructors
	61	////////////////////////////////////////////////////////////
	62
	63	wxDate::wxDate()
	64	{
	65	DisplayFormat=wxMDY;
	66	DisplayOptions='\0';
	67	month = day = year = day_of_week = 0;
	68	julian = 0;
	69	}
	70
	71	wxDate::wxDate (long j) : julian(j)
	72	{
	73	DisplayFormat=wxMDY;
	74	DisplayOptions='\0';
	75	julian_to_mdy ();
	76	}
	77
	78	wxDate::wxDate (int m, int d, int y) : month(m), day(d), year(y)
	79	{
	80	DisplayFormat=wxMDY;
	81	DisplayOptions='\0';
	82	mdy_to_julian ();
	83	}
	84
	85	wxDate::wxDate (const wxString& dat)
	86	{
	87	DisplayFormat=wxMDY;
	88	DisplayOptions='\0';
	89	if (wxStrcmp(dat, wxT("TODAY")) == 0 \|\| wxStrcmp(dat, wxT("today")) == 0)
	90	{
	91	// Sets the current date
	92	Set();
	93	}
	94	else
	95	{
	96	wxChar buf[100];
	97	wxStrcpy(buf, dat);
	98
	99	wxChar save_ptr, token = wxStrtok(buf,wxT("/-"),&save_ptr);
	100	month = wxAtoi(token);
	101	day = wxAtoi(wxStrtok((wxChar *) NULL,wxT("/-"),&save_ptr));
	102	year = wxAtoi(wxStrtok((wxChar *) NULL,wxT(" "),&save_ptr));
	103	}
	104
	105	mdy_to_julian ();
	106	}
	107
	108	wxDate::wxDate (const wxDate &dt)
	109	{
	110	DisplayFormat=dt.DisplayFormat;
	111	DisplayOptions=dt.DisplayOptions;
	112	month = dt.month;
	113	day = dt.day;
	114	year = dt.year;
	115	mdy_to_julian ();
	116	}
	117
	118	void wxDate::operator = (const wxDate &dt)
	119	{
	120	DisplayFormat=dt.DisplayFormat;
	121	DisplayOptions=dt.DisplayOptions;
	122	month = dt.month;
	123	day = dt.day;
	124	year = dt.year;
	125	mdy_to_julian (); // wxUSE_TIMEDATE
	126	}
	127
	128	void wxDate::operator = (const wxString& dat)
	129	{
	130	DisplayFormat=wxMDY;
	131	DisplayOptions='\0';
	132	if (wxStrcmp(dat, wxT("TODAY")) == 0 \|\| wxStrcmp(dat, wxT("today")) == 0)
	133	{
	134	// Sets the current date
	135	Set();
	136	}
	137	else
	138	{
	139	wxChar buf[100];
	140	wxStrcpy(buf, dat);
	141
	142	wxChar save_ptr, token = wxStrtok(buf,wxT("/-"),&save_ptr);
	143	month = wxAtoi(token);
	144	day = wxAtoi(wxStrtok((wxChar *) NULL,wxT("/-"),&save_ptr));
	145	year = wxAtoi(wxStrtok((wxChar *) NULL,wxT(" "),&save_ptr));
	146	}
	147
	148	mdy_to_julian ();
	149	}
	150
	151	//////////////////////////////////////////////////////////////
	152	// Conversion operations
	153	//////////////////////////////////////////////////////////////
	154
	155	#ifndef __SALFORDC__
	156	wxDate::operator wxString( void )
	157	{
	158	return FormatDate();
	159	}
	160	#endif
	161
	162	//////////////////////////////////////////////////////////////
	163	// Date Arithmetic
	164	//////////////////////////////////////////////////////////////
	165
	166	wxDate wxDate::operator + (long i)
	167	{
	168	wxDate dp(julian + i);
	169	return dp;
	170	}
	171
	172	wxDate wxDate::operator + (int i)
	173	{
	174	wxDate dp(julian + (long)i);
	175	return dp;
	176	}
	177
	178	wxDate wxDate::operator - (long i)
	179	{
	180	wxDate dp(julian - i);
	181	return dp;
	182	}
	183
	184	wxDate wxDate::operator - (int i)
	185	{
	186	wxDate dp(julian - (long)i);
	187	return dp;
	188	}
	189
	190	long wxDate::operator - (const wxDate &dt)
	191	{
	192	return ( julian - dt.julian );
	193	}
	194
	195	wxDate &wxDate::operator += (long i)
	196	{
	197	julian += i;
	198	julian_to_mdy();
	199	return *this;
	200	}
	201
	202	wxDate &wxDate::operator -= (long i)
	203	{
	204	julian -= i;
	205	julian_to_mdy();
	206	return *this;
	207	}
	208
	209	wxDate &wxDate::operator ++()
	210	{
	211	julian++;
	212	julian_to_mdy();
	213	return *this;
	214	}
	215
	216	wxDate &wxDate::operator ++(int)
	217	{
	218	julian++;
	219	julian_to_mdy();
	220	return *this;
	221	}
	222
	223	wxDate &wxDate::operator --()
	224	{
	225	julian--;
	226	julian_to_mdy();
	227	return *this;
	228	}
	229
	230	wxDate &wxDate::operator --(int)
	231	{
	232	julian--;
	233	julian_to_mdy();
	234	return *this;
	235	}
	236
	237	//////////////////////////////////////////////////////////////
	238	// Date comparison
	239	//////////////////////////////////////////////////////////////
	240
	241	bool WXDLLEXPORT operator < (const wxDate &dt1, const wxDate &dt2)
	242	{
	243	return ( dt1.julian < dt2.julian );
	244	}
	245
	246	bool WXDLLEXPORT operator <= (const wxDate &dt1, const wxDate &dt2)
	247	{
	248	return ( (dt1.julian == dt2.julian) \|\| (dt1.julian < dt2.julian) );
	249	}
	250
	251	bool WXDLLEXPORT operator > (const wxDate &dt1, const wxDate &dt2)
	252	{
	253	return ( dt1.julian > dt2.julian );
	254	}
	255
	256	bool WXDLLEXPORT operator >= (const wxDate &dt1, const wxDate &dt2)
	257	{
	258	return ( (dt1.julian == dt2.julian) \|\| (dt1.julian > dt2.julian) );
	259	}
	260
	261	bool WXDLLEXPORT operator == (const wxDate &dt1, const wxDate &dt2)
	262	{
	263	return ( dt1.julian == dt2.julian );
	264	}
	265
	266	bool WXDLLEXPORT operator != (const wxDate &dt1, const wxDate &dt2)
	267	{
	268	return ( dt1.julian != dt2.julian );
	269	}
	270
	271
	272	#if wxUSE_STD_IOSTREAM
	273
	274	////////////////////////////////////////////////////////////////
	275	// Ostream operations
	276	////////////////////////////////////////////////////////////////
	277
	278	ostream WXDLLEXPORT & operator << (ostream &os, const wxDate &dt)
	279	{
	280	return os << dt.FormatDate().mb_str();
	281	}
	282
	283	#endif
	284
	285	//////////////////////////////////////////////////////////////
	286	// Conversion routines
	287	//////////////////////////////////////////////////////////////
	288
	289	void wxDate::julian_to_wday (void)
	290	{
	291	// Correction by Peter Stadel <peters@jetcity.com>
	292	day_of_week = (int)((julian - 2) % 7L);
	293	/*
	294	day_of_week = (int) ((julian + 2) % 7 + 1);
	295	*/
	296	}
	297
	298	void wxDate::julian_to_mdy ()
	299	{
	300	long a,b,c,d,e,z,alpha;
	301	z = julian+1;
	302	// dealing with Gregorian calendar reform
	303	if (z < 2299161L)
	304	a = z;
	305	else {
	306	alpha = (long) ((z-1867216.25) / 36524.25);
	307	a = z + 1 + alpha - alpha/4;
	308	}
	309	b = ( a > 1721423 ? a + 1524 : a + 1158 );
	310	c = (long) ((b - 122.1) / 365.25);
	311	d = (long) (365.25 * c);
	312	e = (long) ((b - d) / 30.6001);
	313	day = (int)(b - d - (long)(30.6001 * e));
	314	month = (int)((e < 13.5) ? e - 1 : e - 13);
	315	year = (int)((month > 2.5 ) ? (c - 4716) : c - 4715);
	316	julian_to_wday ();
	317	}
	318
	319	void wxDate::mdy_to_julian (void)
	320	{
	321	int a,b=0;
	322	int work_month=month, work_day=day, work_year=year;
	323	// correct for negative year
	324	if (work_year < 0)
	325	work_year++;
	326	if (work_month <= 2)
	327	{ work_year--; work_month +=12; }
	328
	329	// deal with Gregorian calendar
	330	if (work_year10000. + work_month100. + work_day >= 15821015.)
	331	{
	332	a = (int)(work_year/100.);
	333	b = 2 - a + a/4;
	334	}
	335	julian = (long) (365.25*work_year) +
	336	(long) (30.6001 * (work_month+1)) + work_day + 1720994L + b;
	337	julian_to_wday ();
	338	}
	339
	340	////////////////////////////////////////////////////////////////
	341	// Format routine
	342	////////////////////////////////////////////////////////////////
	343
	344	wxString wxDate::FormatDate (int type) const
	345	{
	346	int actualType = type;
	347	if (actualType == -1)
	348	actualType = DisplayFormat;
	349
	350	wxChar buf[40];
	351
	352	memset( buf, '\0', sizeof(buf) );
	353	switch ( actualType )
	354	{
	355	case wxDAY:
	356	if ( (day_of_week < 1) \|\| (day_of_week > 7) )
	357	wxStrcpy(buf, _("invalid day"));
	358	else
	359	wxStrncpy( buf, wxGetTranslation(dayname[day_of_week-1]),
	360	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	361	return wxString(buf);
	362
	363	case wxMONTH:
	364	if ( (month < 1) \|\| (month > 12) )
	365	wxStrcpy(buf, _("invalid month"));
	366	else
	367	wxStrncpy( buf, wxGetTranslation(mname[month-1]),
	368	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	369	return wxString(buf);
	370
	371	case wxFULL:
	372	if ( (month < 1) \|\| (month > 12) \|\| (day_of_week < 0) \|\|
	373	(day_of_week > 7) )
	374	{
	375	wxStrcpy(buf, _("invalid date"));
	376	return wxString(buf);
	377	}
	378	wxStrncpy( buf, wxGetTranslation(dayname[day_of_week-1]),
	379	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	380	wxStrcat( buf, wxT(", "));
	381	wxStrncat( buf, wxGetTranslation(mname[month-1]),
	382	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	383	wxStrcat( buf, wxT(" "));
	384	wxSprintf( buf+wxStrlen(buf), wxT("%d, %d"), day, abs(year) );
	385	if (year < 0)
	386	wxStrcat(buf,_(" B.C."));
	387	return wxString(buf);
	388
	389	case wxEUROPEAN:
	390	if ( (month < 1) \|\| (month > 12) \|\| (day_of_week < 0) \|\|
	391	(day_of_week > 7) )
	392	{
	393	wxStrcpy(buf, _("invalid date"));
	394	return wxString(buf);
	395	}
	396	wxSprintf(buf,wxT("%d "), day);
	397	wxStrncat(buf, wxGetTranslation(mname[month-1]),
	398	(DisplayOptions & wxDATE_ABBR) ? ABBR_LENGTH : 9);
	399	wxSprintf( buf+wxStrlen(buf), wxT(" %d"), abs(year) );
	400	if (year < 0)
	401	wxStrcat(buf, _(" B.C."));
	402	return wxString(buf);
	403
	404	case wxMDY:
	405	default:
	406	if (day==0 \|\| month==0 \|\| year==0)
	407	wxStrcpy(buf, _("invalid date"));
	408	else
	409	wxSprintf( buf+wxStrlen(buf), wxT("%1d/%1d/%02d"), month, day,
	410	(DisplayOptions & wxNO_CENTURY) && (abs(year) > 1899)
	411	? (abs(year) - (abs(year) / 100 * 100))
	412	: (abs(year)) );
	413	return wxString(buf);
	414	}
	415	}
	416
	417	void wxDate::SetFormat( int format )
	418	{
	419	DisplayFormat = format;
	420	}
	421
	422	int wxDate::SetOption( int option, bool action )
	423	{
	424	switch ( option )
	425	{
	426	case wxNO_CENTURY:
	427	if ( action )
	428	DisplayOptions \|= wxNO_CENTURY;
	429	else
	430	{
	431	DisplayOptions &= (~wxNO_CENTURY);
	432	}
	433	return 1;
	434	case wxDATE_ABBR:
	435	if ( action )
	436	DisplayOptions \|= wxDATE_ABBR;
	437	else
	438	{
	439	DisplayOptions &= (~wxDATE_ABBR);
	440	}
	441	return 1;
	442	default:
	443	return 0;
	444	}
	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	{
	475	//#ifdef __WXMSW__
	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
	486	time_t now = time((time_t *) NULL);
	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
	632	wxDate wxDate::Previous(int dayOfWeek) const
	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