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176 lines
5.3 KiB
176 lines
5.3 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: time.hxx
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//
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// Contents: Time/date common routines.
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//
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// History: 08-Sep-95 EricB Created.
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// 01-Dec-95 MarkBl Split from util.hxx.
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//
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//----------------------------------------------------------------------------
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#ifndef __TIME_HXX__
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#define __TIME_HXX__
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//#include "runobj.hxx"
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//
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// Time/date constants
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//
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const WORD JOB_MIN_MONTH = 1;
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const WORD JOB_MAX_MONTH = 12;
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const WORD JOB_MONTHS_PER_YEAR = JOB_MAX_MONTH ;
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const WORD JOB_MIN_DAY = 1;
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const WORD JOB_MAX_DAY = 31;
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const WORD JOB_DAYS_PER_MONTHMAX = JOB_MAX_DAY;
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const WORD JOB_MIN_HOUR = 0;
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const WORD JOB_MAX_HOUR = 23;
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const WORD JOB_MIN_MINUTE = 0;
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const WORD JOB_MAX_MINUTE = 59;
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const WORD JOB_MILLISECONDS_PER_SECOND = 1000;
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const WORD JOB_MILLISECONDS_PER_MINUTE = 60 * JOB_MILLISECONDS_PER_SECOND;
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const WORD JOB_MINS_PER_HOUR = 60;
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const WORD JOB_HOURS_PER_DAY = 24;
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const WORD JOB_MINS_PER_DAY = JOB_HOURS_PER_DAY * JOB_MINS_PER_HOUR;
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const WORD JOB_DAYS_PER_WEEK = 7;
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const DWORD JOB_RGFDAYS_MAX = 0x7fffffff;
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const WORD JOB_RGFDOW_MAX = 0x7f;
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const WORD JOB_RGFMONTHS_MAX = 0xfff;
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const WORD JOB_MONTH_FEBRUARY = 2;
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const int JOB_TIMEBUF_LEN = 40;
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const short MAX_INTERVAL_MINUTES = 720;
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const short MAX_INTERVAL_HOURS = 12;
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const unsigned long FILETIMES_PER_MILLISECOND = 10000;
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const DWORD FILETIMES_PER_SECOND = JOB_MILLISECONDS_PER_SECOND *
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FILETIMES_PER_MILLISECOND;
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const DWORD FILETIMES_PER_MINUTE = FILETIMES_PER_MILLISECOND *
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JOB_MILLISECONDS_PER_MINUTE;
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//
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// BUGBUG: neither of these are currently working without CRT initialization.
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// BUG # 37752.
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//
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//const __int64 FILETIMES_PER_HOUR = (__int64)FILETIMES_PER_MINUTE
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// * JOB_MINS_PER_HOUR;
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//const __int64 FILETIMES_PER_DAY = FILETIMES_PER_HOUR * JOB_HOURS_PER_DAY;
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//
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// Logically, this should be MAX_FILETIME = { MAXDWORD, MAXDWORD };
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// but CompareFileTime on NT 4 is broken for FILETIMEs larger than the
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// one below (NT bug 88901).
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// Also, the FILETIME below is the largest FILETIME accepted by
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// FileTimeToSystemTime().
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//
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const FILETIME MAX_FILETIME = { MAXULONG, 0x7fffffff };
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const BYTE g_rgMonthDays[] =
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{
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0, // make January's index 1
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31, // January
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28, // February
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31, // March
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30, // April
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31, // May
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30, // June
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31, // July
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31, // August
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30, // September
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31, // October
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30, // November
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31 // December
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};
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//
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// Time/date common routines.
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//
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HRESULT MonthDays(WORD wMonth, WORD wYear, WORD *pwDays);
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BOOL IsLeapYear(WORD wYear);
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BOOL IsValidDate(WORD wMonth, WORD wDay, WORD wYear);
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//+----------------------------------------------------------------------------
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//
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// Function: IsFirstDateEarlier
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//
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// Synopsis: Compares the date portion of the two params
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//
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// Arguments: [pstFirst, pstSecond] - the dates to compare
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//
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// Returns: TRUE if the first date is earlier than the second
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//
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//-----------------------------------------------------------------------------
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inline BOOL
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IsFirstDateEarlier(const SYSTEMTIME * pstFirst, const SYSTEMTIME * pstSecond)
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{
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if (pstFirst->wYear > pstSecond->wYear ||
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(pstFirst->wYear == pstSecond->wYear &&
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(pstFirst->wMonth > pstSecond->wMonth ||
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(pstFirst->wMonth == pstSecond->wMonth &&
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pstFirst->wDay >= pstSecond->wDay))))
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{
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return FALSE;
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}
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return TRUE;
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}
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//+----------------------------------------------------------------------------
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//
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// Function: IsFirstTimeEarlier
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//
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// Synopsis: Compares two SYSTEMTIMES
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//
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// Arguments: [pstFirst, pstSecond] - the dates to compare
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//
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// Returns: TRUE if the first date-time is earlier than the second
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//
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//-----------------------------------------------------------------------------
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inline BOOL
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IsFirstTimeEarlier(const SYSTEMTIME *pstFirst, const SYSTEMTIME *pstSecond)
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{
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FILETIME ftFirst, ftSecond;
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SystemTimeToFileTime(pstFirst, &ftFirst);
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SystemTimeToFileTime(pstSecond, &ftSecond);
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return (CompareFileTime(&ftFirst, &ftSecond) < 0);
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}
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//+----------------------------------------------------------------------------
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//
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// Function: IncrementMonth
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//
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// Synopsis: increases the SYSTEMTIME month value by one and corrects for
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// overflow
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//
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// Arguments: [pst] - the date to increment
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//
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//-----------------------------------------------------------------------------
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inline void
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IncrementMonth(LPSYSTEMTIME pst)
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{
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if (pst->wMonth < JOB_MONTHS_PER_YEAR)
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{
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pst->wMonth++;
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}
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else
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{
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pst->wMonth = 1;
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pst->wYear++;
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}
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}
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//+----------------------------------------------------------------------------
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//
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// Function: IncrementDau
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//
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// Synopsis: increases the SYSTEMTIME day value by one and corrects for
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// overflow
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//
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// Arguments: [pst] - the date to increment
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//
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//-----------------------------------------------------------------------------
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void
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IncrementDay(LPSYSTEMTIME pst);
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#endif // __TIME_HXX__
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