More fool-proof lock in thread events code.

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

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/datetime.h
// Purpose:     implementation of time/date related classes
// Author:      Vadim Zeitlin
// Modified by:
// Created:     11.05.99
// RCS-ID:      $Id$
// Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/string.h"
    #include "wx/intl.h"
    #include "wx/log.h"
#endif // WX_PRECOMP

#include "wx/datetime.h"

// ============================================================================
// implementation of wxDateTime
// ============================================================================

// ----------------------------------------------------------------------------
// static data
// ----------------------------------------------------------------------------

Country wxDateTime::ms_country;
wxDateTime wxDateTime::ms_InvDateTime;

// ----------------------------------------------------------------------------
// constructors and assignment operators
// ----------------------------------------------------------------------------

wxDateTime& wxDateTime::Set(const struct tm& tm)
{
    time_t timet = mktime(tm);
    if ( timet == (time_t)(-1) )
    {
        wxFAIL_MSG(_T("Invalid time"));

        return ms_InvDateTime;
    }
    else
    {
        return Set(timet);
    }
}

wxDateTime& wxDateTime::Set(wxDateTime_t hour,
                            wxDateTime_t minute,
                            wxDateTime_t second,
                            wxDateTime_t millisec)
{
    // we allow seconds to be 61 to account for the leap seconds, even if we
    // don't use them really
    wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
                 ms_InvDateTime,
                 _T("Invalid time in wxDateTime::Set()") );

    // get the current date from system
    time_t timet = GetTimeNow();
    struct tm *tm = localtime(&timet);

    // adjust the time
    tm->tm_hour = hour;
    tm->tm_min = minute;
    tm->tm_sec = second;

    (void)Set(tm);

    // and finally adjust milliseconds
    return SetMillisecond(millisec);
}

wxDateTime& wxDateTime::Set(wxDateTime_t day,
                            Month        month,
                            int          year,
                            wxDateTime_t hour,
                            wxDateTime_t minute,
                            wxDateTime_t second,
                            wxDateTime_t millisec)
{
    wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
                 ms_InvDateTime,
                 _T("Invalid time in wxDateTime::Set()") );

    if ( year == Inv_Year )
        year = GetCurrentYear();
    if ( month == Inv_Month )
        month = GetCurrentMonth();

    wxCHECK_MSG( day < GetNumberOfDays(month, year), ms_InvDateTime,
                 _T("Invalid date in wxDateTime::Set()") );

    // the range of time_t type (inclusive)
    static const int yearMinInRange = 1970;
    static const int yearMaxInRange = 2037;

    // test only the year instead of testing for the exact end of the Unix
    // time_t range - it doesn't bring anything to do more precise checks
    if ( year >= yearMaxInRange && year <= yearMaxInRange )
    {
        // use the standard library version if the date is in range - this is
        // probably much more efficient than our code
        struct tm tm;
        tm.tm_year = year;
        tm.tm_mon = month;
        tm.tm_mday = day;
        tm.tm_hour = hour;
        tm.tm_min = minute;
        tm.tm_sec = second;

        (void)Set(tm);

        // and finally adjust milliseconds
        return SetMillisecond(millisec);
    }
    else
    {
        // do time calculations ourselves: we want to calculate the number of
        // milliseconds between the given date and the epoch (necessarily
        // negative)
    }

    return *this;
}