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Implement the non-variant date conversions correctly, without going
through 'struct tm' first. Handle negative & 'rolling' dates too.
This commit is contained in:
Jon Griffiths
Alexandre Julliard
parent
2f558b53f1
commit
136fa03fbf
1 changed files with 416 additions and 294 deletions
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@ -2,6 +2,10 @@
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* VARIANT
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*
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* Copyright 1998 Jean-Claude Cote
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* Copyright 2003 Jon Griffiths
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* The alorithm for conversion from Julian days to day/month/year is based on
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* that devised by Henry Fliegel, as implemented in PostgreSQL, which is
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* Copyright 1994-7 Regents of the University of California
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -4206,27 +4210,427 @@ error:
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return DISP_E_TYPEMISMATCH;
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}
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/* Date Conversions */
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#define IsLeapYear(y) (((y % 4) == 0) && (((y % 100) != 0) || ((y % 400) == 0)))
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/* Convert a VT_DATE value to a Julian Date */
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static inline int VARIANT_JulianFromDate(int dateIn)
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{
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int julianDays = dateIn;
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julianDays -= DATE_MIN; /* Convert to + days from 1 Jan 100 AD */
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julianDays += 1757585; /* Convert to + days from 23 Nov 4713 BC (Julian) */
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return julianDays;
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}
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/* Convert a Julian Date to a VT_DATE value */
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static inline int VARIANT_DateFromJulian(int dateIn)
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{
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int julianDays = dateIn;
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julianDays -= 1757585; /* Convert to + days from 1 Jan 100 AD */
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julianDays += DATE_MIN; /* Convert to +/- days from 1 Jan 1899 AD */
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return julianDays;
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}
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/* Convert a Julian date to Day/Month/Year - from PostgreSQL */
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static inline void VARIANT_DMYFromJulian(int jd, USHORT *year, USHORT *month, USHORT *day)
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{
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int j, i, l, n;
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l = jd + 68569;
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n = l * 4 / 146097;
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l -= (n * 146097 + 3) / 4;
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i = (4000 * (l + 1)) / 1461001;
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l += 31 - (i * 1461) / 4;
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j = (l * 80) / 2447;
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*day = l - (j * 2447) / 80;
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l = j / 11;
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*month = (j + 2) - (12 * l);
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*year = 100 * (n - 49) + i + l;
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}
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/* Convert Day/Month/Year to a Julian date - from PostgreSQL */
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static inline double VARIANT_JulianFromDMY(USHORT year, USHORT month, USHORT day)
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{
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int m12 = (month - 14) / 12;
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return ((1461 * (year + 4800 + m12)) / 4 + (367 * (month - 2 - 12 * m12)) / 12 -
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(3 * ((year + 4900 + m12) / 100)) / 4 + day - 32075);
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}
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/* Macros for accessing DOS format date/time fields */
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#define DOS_YEAR(x) (1980 + (x >> 9))
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#define DOS_MONTH(x) ((x >> 5) & 0xf)
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#define DOS_DAY(x) (x & 0x1f)
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#define DOS_HOUR(x) (x >> 11)
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#define DOS_MINUTE(x) ((x >> 5) & 0x3f)
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#define DOS_SECOND(x) ((x & 0x1f) << 1)
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/* Create a DOS format date/time */
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#define DOS_DATE(d,m,y) (d | (m << 5) | ((y-1980) << 9))
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#define DOS_TIME(h,m,s) ((s >> 1) | (m << 5) | (h << 11))
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/* Roll a date forwards or backwards to correct it */
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static HRESULT VARIANT_RollUdate(UDATE *lpUd)
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{
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static const BYTE days[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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TRACE("Raw date: %d/%d/%d %d:%d:%d\n", lpUd->st.wDay, lpUd->st.wMonth,
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lpUd->st.wYear, lpUd->st.wHour, lpUd->st.wMinute, lpUd->st.wSecond);
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/* Years < 100 are treated as 1900 + year */
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if (lpUd->st.wYear < 100)
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lpUd->st.wYear += 1900;
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if (!lpUd->st.wMonth)
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{
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/* Roll back to December of the previous year */
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lpUd->st.wMonth = 12;
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lpUd->st.wYear--;
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}
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else while (lpUd->st.wMonth > 12)
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{
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/* Roll forward the correct number of months */
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lpUd->st.wYear++;
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lpUd->st.wMonth -= 12;
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}
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if (lpUd->st.wYear > 9999 || lpUd->st.wHour > 23 ||
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lpUd->st.wMinute > 59 || lpUd->st.wSecond > 59)
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return E_INVALIDARG; /* Invalid values */
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if (!lpUd->st.wDay)
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{
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/* Roll back the date one day */
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if (lpUd->st.wMonth == 1)
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{
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/* Roll back to December 31 of the previous year */
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lpUd->st.wDay = 31;
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lpUd->st.wMonth = 12;
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lpUd->st.wYear--;
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}
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else
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{
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lpUd->st.wMonth--; /* Previous month */
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if (lpUd->st.wMonth == 2 && IsLeapYear(lpUd->st.wYear))
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lpUd->st.wDay = 29; /* Februaury has 29 days on leap years */
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else
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lpUd->st.wDay = days[lpUd->st.wMonth]; /* Last day of the month */
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}
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}
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else if (lpUd->st.wDay > 28)
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{
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int rollForward = 0;
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/* Possibly need to roll the date forward */
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if (lpUd->st.wMonth == 2 && IsLeapYear(lpUd->st.wYear))
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rollForward = lpUd->st.wDay - 29; /* Februaury has 29 days on leap years */
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else
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rollForward = lpUd->st.wDay - days[lpUd->st.wMonth];
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if (rollForward > 0)
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{
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lpUd->st.wDay = rollForward;
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lpUd->st.wMonth++;
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if (lpUd->st.wMonth > 12)
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{
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lpUd->st.wMonth = 1; /* Roll forward into January of the next year */
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lpUd->st.wYear++;
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}
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}
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}
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TRACE("Rolled date: %d/%d/%d %d:%d:%d\n", lpUd->st.wDay, lpUd->st.wMonth,
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lpUd->st.wYear, lpUd->st.wHour, lpUd->st.wMinute, lpUd->st.wSecond);
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return S_OK;
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}
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/**********************************************************************
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* DosDateTimeToVariantTime [OLEAUT32.14]
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* Convert dos representation of time to the date and time representation
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* stored in a variant.
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*
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* Convert a Dos format date and time into variant VT_DATE format.
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*
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* PARAMS
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* wDosDate [I] Dos format date
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* wDosTime [I] Dos format time
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* pDateOut [O] Destination for VT_DATE format
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*
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* RETURNS
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* Success: TRUE. pDateOut contains the converted time.
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* Failure: FALSE, if wDosDate or wDosTime are invalid (see notes).
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*
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* NOTES
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* - Dos format dates can only hold dates from 1-Jan-1980 to 31-Dec-2099.
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* - Dos format times are accurate to only 2 second precision.
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* - The format of a Dos Date is:
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*| Bits Values Meaning
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*| ---- ------ -------
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*| 0-4 1-31 Day of the week. 0 rolls back one day. A value greater than
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*| the days in the month rolls forward the extra days.
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*| 5-8 1-12 Month of the year. 0 rolls back to December of the previous
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*| year. 13-15 are invalid.
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*| 9-15 0-119 Year based from 1980 (Max 2099). 120-127 are invalid.
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* - The format of a Dos Time is:
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*| Bits Values Meaning
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*| ---- ------ -------
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*| 0-4 0-29 Seconds/2. 30 and 31 are invalid.
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*| 5-10 0-59 Minutes. 60-63 are invalid.
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*| 11-15 0-23 Hours (24 hour clock). 24-32 are invalid.
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*/
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INT WINAPI DosDateTimeToVariantTime(USHORT wDosDate, USHORT wDosTime,
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DATE *pvtime)
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double *pDateOut)
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{
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struct tm t;
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UDATE ud;
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TRACE("( 0x%x, 0x%x, %p ), stub\n", wDosDate, wDosTime, pvtime );
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TRACE("(0x%x(%d/%d/%d),0x%x(%d:%d:%d),%p)\n",
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wDosDate, DOS_YEAR(wDosDate), DOS_MONTH(wDosDate), DOS_DAY(wDosDate),
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wDosTime, DOS_HOUR(wDosTime), DOS_MINUTE(wDosTime), DOS_SECOND(wDosTime),
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pDateOut);
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t.tm_sec = (wDosTime & 0x001f) * 2;
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t.tm_min = (wDosTime & 0x07e0) >> 5;
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t.tm_hour = (wDosTime & 0xf800) >> 11;
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ud.st.wYear = DOS_YEAR(wDosDate);
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ud.st.wMonth = DOS_MONTH(wDosDate);
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if (ud.st.wYear > 2099 || ud.st.wMonth > 12)
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return FALSE;
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ud.st.wDay = DOS_DAY(wDosDate);
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ud.st.wHour = DOS_HOUR(wDosTime);
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ud.st.wMinute = DOS_MINUTE(wDosTime);
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ud.st.wSecond = DOS_SECOND(wDosTime);
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ud.st.wDayOfWeek = ud.st.wMilliseconds = 0;
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t.tm_mday = (wDosDate & 0x001f);
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t.tm_mon = (wDosDate & 0x01e0) >> 5;
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t.tm_year = ((wDosDate & 0xfe00) >> 9) + 1980;
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return !VarDateFromUdate(&ud, 0, pDateOut);
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}
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return TmToDATE( &t, pvtime );
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/**********************************************************************
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* VariantTimeToDosDateTime [OLEAUT32.13]
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*
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* Convert a variant format date into a Dos format date and time.
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*
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* dateIn [I] VT_DATE time format
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* pwDosDate [O] Destination for Dos format date
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* pwDosTime [O] Destination for Dos format time
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*
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* RETURNS
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* Success: TRUE. pwDosDate and pwDosTime contains the converted values.
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* Failure: FALSE, if dateIn cannot be represented in Dos format.
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*
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* NOTES
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* See DosDateTimeToVariantTime() for Dos format details and bugs.
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*/
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INT WINAPI VariantTimeToDosDateTime(double dateIn, USHORT *pwDosDate, USHORT *pwDosTime)
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{
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UDATE ud;
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TRACE("(%g,%p,%p)\n", dateIn, pwDosDate, pwDosTime);
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if (FAILED(VarUdateFromDate(dateIn, 0, &ud)))
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return FALSE;
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if (ud.st.wYear < 1980 || ud.st.wYear > 2099)
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return FALSE;
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*pwDosDate = DOS_DATE(ud.st.wDay, ud.st.wMonth, ud.st.wYear);
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*pwDosTime = DOS_TIME(ud.st.wHour, ud.st.wMinute, ud.st.wSecond);
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TRACE("Returning 0x%x(%d/%d/%d), 0x%x(%d:%d:%d)\n",
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*pwDosDate, DOS_YEAR(*pwDosDate), DOS_MONTH(*pwDosDate), DOS_DAY(*pwDosDate),
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*pwDosTime, DOS_HOUR(*pwDosTime), DOS_MINUTE(*pwDosTime), DOS_SECOND(*pwDosTime));
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return TRUE;
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}
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/***********************************************************************
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* SystemTimeToVariantTime [OLEAUT32.184]
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*
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* Convert a System format date and time into variant VT_DATE format.
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*
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* PARAMS
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* lpSt [I] System format date and time
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* pDateOut [O] Destination for VT_DATE format date
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*
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* RETURNS
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* Success: TRUE. *pDateOut contains the converted value.
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* Failure: FALSE, if lpSt cannot be represented in VT_DATE format.
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*/
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INT WINAPI SystemTimeToVariantTime(LPSYSTEMTIME lpSt, double *pDateOut)
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{
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UDATE ud;
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TRACE("(%p->%d/%d/%d %d:%d:%d,%p)\n", lpSt, lpSt->wDay, lpSt->wMonth,
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lpSt->wYear, lpSt->wHour, lpSt->wMinute, lpSt->wSecond, pDateOut);
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if (lpSt->wMonth > 12)
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return FALSE;
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memcpy(&ud.st, lpSt, sizeof(ud.st));
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return !VarDateFromUdate(&ud, 0, pDateOut);
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}
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/***********************************************************************
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* VariantTimeToSystemTime [OLEAUT32.185]
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*
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* Convert a variant VT_DATE into a System format date and time.
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*
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* PARAMS
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* datein [I] Variant VT_DATE format date
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* lpSt [O] Destination for System format date and time
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*
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* RETURNS
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* Success: TRUE. *lpSt contains the converted value.
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* Failure: FALSE, if dateIn is too large or small.
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*/
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INT WINAPI VariantTimeToSystemTime(double dateIn, LPSYSTEMTIME lpSt)
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{
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UDATE ud;
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TRACE("(%g,%p)\n", dateIn, lpSt);
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if (FAILED(VarUdateFromDate(dateIn, 0, &ud)))
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return FALSE;
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memcpy(lpSt, &ud.st, sizeof(ud.st));
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return TRUE;
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}
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/***********************************************************************
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* VarDateFromUdate [OLEAUT32.330]
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*
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* Convert an unpacked format date and time to a variant VT_DATE.
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*
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* PARAMS
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* pUdateIn [I] Unpacked format date and time to convert
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* dwFlags [I] Flags controlling the conversion (VAR_ flags from "oleauto.h")
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* pDateOut [O] Destination for variant VT_DATE.
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*
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* RETURNS
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* Success: S_OK. *pDateOut contains the converted value.
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* Failure: E_INVALIDARG, if pUdateIn cannot be represented in VT_DATE format.
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*/
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HRESULT WINAPI VarDateFromUdate(UDATE *pUdateIn, ULONG dwFlags, DATE *pDateOut)
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{
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UDATE ud;
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double dateVal;
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TRACE("(%p->%d/%d/%d %d:%d:%d:%d %d %d,0x%08lx,%p)\n", pUdateIn,
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pUdateIn->st.wMonth, pUdateIn->st.wDay, pUdateIn->st.wYear,
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pUdateIn->st.wHour, pUdateIn->st.wMinute, pUdateIn->st.wSecond,
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pUdateIn->st.wMilliseconds, pUdateIn->st.wDayOfWeek,
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pUdateIn->wDayOfYear, dwFlags, pDateOut);
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memcpy(&ud, pUdateIn, sizeof(ud));
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if (dwFlags & VAR_VALIDDATE)
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WARN("Ignoring VAR_VALIDDATE\n");
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if (FAILED(VARIANT_RollUdate(&ud)))
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return E_INVALIDARG;
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/* Date */
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dateVal = VARIANT_DateFromJulian(VARIANT_JulianFromDMY(ud.st.wYear, ud.st.wMonth, ud.st.wDay));
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/* Time */
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dateVal += ud.st.wHour / 24.0;
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dateVal += ud.st.wMinute / 1440.0;
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dateVal += ud.st.wSecond / 86400.0;
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dateVal += ud.st.wMilliseconds / 86400000.0;
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TRACE("Returning %g\n", dateVal);
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*pDateOut = dateVal;
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return S_OK;
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}
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/***********************************************************************
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* VarUdateFromDate [OLEAUT32.331]
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*
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* Convert a variant VT_DATE into an unpacked format date and time.
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*
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* PARAMS
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* datein [I] Variant VT_DATE format date
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* dwFlags [I] Flags controlling the conversion (VAR_ flags from "oleauto.h")
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* lpUdate [O] Destination for unpacked format date and time
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*
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* RETURNS
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* Success: S_OK. *lpUdate contains the converted value.
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* Failure: E_INVALIDARG, if dateIn is too large or small.
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*/
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HRESULT WINAPI VarUdateFromDate(DATE dateIn, ULONG dwFlags, UDATE *lpUdate)
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{
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/* Cumulative totals of days per month */
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static const USHORT cumulativeDays[] =
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{
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0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
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};
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double datePart, timePart;
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int julianDays;
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TRACE("(%g,0x%08lx,%p)\n", dateIn, dwFlags, lpUdate);
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if (dateIn <= (DATE_MIN - 1.0) || dateIn >= (DATE_MAX + 1.0))
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return E_INVALIDARG;
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datePart = dateIn < 0.0 ? ceil(dateIn) : floor(dateIn);
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/* Compensate for int truncation (always downwards) */
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timePart = dateIn - datePart + 0.00000000001;
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if (timePart >= 1.0)
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timePart -= 0.00000000001;
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/* Date */
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julianDays = VARIANT_JulianFromDate(dateIn);
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VARIANT_DMYFromJulian(julianDays, &lpUdate->st.wYear, &lpUdate->st.wMonth,
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&lpUdate->st.wDay);
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datePart = (datePart + 1.5) / 7.0;
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lpUdate->st.wDayOfWeek = (datePart - floor(datePart)) * 7;
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if (lpUdate->st.wDayOfWeek == 0)
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lpUdate->st.wDayOfWeek = 5;
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else if (lpUdate->st.wDayOfWeek == 1)
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lpUdate->st.wDayOfWeek = 6;
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else
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lpUdate->st.wDayOfWeek -= 2;
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if (lpUdate->st.wMonth > 2 && IsLeapYear(lpUdate->st.wYear))
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lpUdate->wDayOfYear = 1; /* After February, in a leap year */
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else
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lpUdate->wDayOfYear = 0;
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lpUdate->wDayOfYear += cumulativeDays[lpUdate->st.wMonth];
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lpUdate->wDayOfYear += lpUdate->st.wDay;
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/* Time */
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timePart *= 24.0;
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lpUdate->st.wHour = timePart;
|
||||
timePart -= lpUdate->st.wHour;
|
||||
timePart *= 60.0;
|
||||
lpUdate->st.wMinute = timePart;
|
||||
timePart -= lpUdate->st.wMinute;
|
||||
timePart *= 60.0;
|
||||
lpUdate->st.wSecond = timePart;
|
||||
timePart -= lpUdate->st.wSecond;
|
||||
lpUdate->st.wMilliseconds = 0;
|
||||
if (timePart > 0.0005)
|
||||
{
|
||||
/* Round the milliseconds, adjusting the time/date forward if needed */
|
||||
if (lpUdate->st.wSecond < 59)
|
||||
lpUdate->st.wSecond++;
|
||||
else
|
||||
{
|
||||
lpUdate->st.wSecond = 0;
|
||||
if (lpUdate->st.wMinute < 59)
|
||||
lpUdate->st.wMinute++;
|
||||
else
|
||||
{
|
||||
lpUdate->st.wMinute = 0;
|
||||
if (lpUdate->st.wHour < 23)
|
||||
lpUdate->st.wHour++;
|
||||
else
|
||||
{
|
||||
lpUdate->st.wHour = 0;
|
||||
/* Roll over a whole day */
|
||||
if (++lpUdate->st.wDay > 28)
|
||||
VARIANT_RollUdate(lpUdate);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return S_OK;
|
||||
}
|
||||
|
||||
#define GET_NUMBER_TEXT(fld,name) \
|
||||
|
|
@ -5003,288 +5407,6 @@ HRESULT WINAPI VarFormatCurrency(LPVARIANT var, INT digits, INT lead, INT paren,
|
|||
return E_NOTIMPL;
|
||||
}
|
||||
|
||||
/**********************************************************************
|
||||
* VariantTimeToDosDateTime [OLEAUT32.13]
|
||||
* Convert variant representation of time to the date and time representation
|
||||
* stored in dos.
|
||||
*/
|
||||
INT WINAPI VariantTimeToDosDateTime(DATE pvtime, USHORT *wDosDate, USHORT *wDosTime)
|
||||
{
|
||||
struct tm t;
|
||||
*wDosTime = 0;
|
||||
*wDosDate = 0;
|
||||
|
||||
TRACE("( 0x%x, 0x%x, %p ), stub\n", *wDosDate, *wDosTime, &pvtime );
|
||||
|
||||
if (DateToTm(pvtime, 0, &t) < 0) return 0;
|
||||
|
||||
*wDosTime = *wDosTime | (t.tm_sec / 2);
|
||||
*wDosTime = *wDosTime | (t.tm_min << 5);
|
||||
*wDosTime = *wDosTime | (t.tm_hour << 11);
|
||||
|
||||
*wDosDate = *wDosDate | t.tm_mday ;
|
||||
*wDosDate = *wDosDate | t.tm_mon << 5;
|
||||
*wDosDate = *wDosDate | ((t.tm_year - 1980) << 9) ;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/***********************************************************************
|
||||
* SystemTimeToVariantTime [OLEAUT32.184]
|
||||
*/
|
||||
HRESULT WINAPI SystemTimeToVariantTime( LPSYSTEMTIME lpSystemTime, double *pvtime )
|
||||
{
|
||||
struct tm t;
|
||||
|
||||
TRACE(" %d/%d/%d %d:%d:%d\n",
|
||||
lpSystemTime->wMonth, lpSystemTime->wDay,
|
||||
lpSystemTime->wYear, lpSystemTime->wHour,
|
||||
lpSystemTime->wMinute, lpSystemTime->wSecond);
|
||||
|
||||
if (lpSystemTime->wYear >= 1900)
|
||||
{
|
||||
t.tm_sec = lpSystemTime->wSecond;
|
||||
t.tm_min = lpSystemTime->wMinute;
|
||||
t.tm_hour = lpSystemTime->wHour;
|
||||
|
||||
t.tm_mday = lpSystemTime->wDay;
|
||||
t.tm_mon = lpSystemTime->wMonth - 1; /* tm_mon is 0..11, wMonth is 1..12 */
|
||||
t.tm_year = lpSystemTime->wYear;
|
||||
|
||||
return TmToDATE( &t, pvtime );
|
||||
}
|
||||
else
|
||||
{
|
||||
double tmpDate;
|
||||
long firstDayOfNextYear;
|
||||
long thisDay;
|
||||
long leftInYear;
|
||||
long result;
|
||||
|
||||
double decimalPart = 0.0;
|
||||
|
||||
t.tm_sec = lpSystemTime->wSecond;
|
||||
t.tm_min = lpSystemTime->wMinute;
|
||||
t.tm_hour = lpSystemTime->wHour;
|
||||
|
||||
/* Step year forward the same number of years before 1900 */
|
||||
t.tm_year = 1900 + 1899 - lpSystemTime->wYear;
|
||||
t.tm_mon = lpSystemTime->wMonth - 1;
|
||||
t.tm_mday = lpSystemTime->wDay;
|
||||
|
||||
/* Calculate date */
|
||||
TmToDATE( &t, pvtime );
|
||||
|
||||
thisDay = (double) floor( *pvtime );
|
||||
decimalPart = fmod( *pvtime, thisDay );
|
||||
|
||||
/* Now, calculate the same time for the first of Jan that year */
|
||||
t.tm_mon = 0;
|
||||
t.tm_mday = 1;
|
||||
t.tm_sec = 0;
|
||||
t.tm_min = 0;
|
||||
t.tm_hour = 0;
|
||||
t.tm_year = t.tm_year+1;
|
||||
TmToDATE( &t, &tmpDate );
|
||||
firstDayOfNextYear = (long) floor(tmpDate);
|
||||
|
||||
/* Finally since we know the size of the year, subtract the two to get
|
||||
remaining time in the year */
|
||||
leftInYear = firstDayOfNextYear - thisDay;
|
||||
|
||||
/* Now we want full years up to the year in question, and remainder of year
|
||||
of the year in question */
|
||||
if (isleap(lpSystemTime->wYear) ) {
|
||||
TRACE("Extra day due to leap year\n");
|
||||
result = 2.0 - ((firstDayOfNextYear - 366) + leftInYear - 2.0);
|
||||
} else {
|
||||
result = 2.0 - ((firstDayOfNextYear - 365) + leftInYear - 2.0);
|
||||
}
|
||||
*pvtime = (double) result + decimalPart;
|
||||
TRACE("<1899 support: returned %f, 1st day %ld, thisday %ld, left %ld\n", *pvtime, firstDayOfNextYear, thisDay, leftInYear);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/***********************************************************************
|
||||
* VariantTimeToSystemTime [OLEAUT32.185]
|
||||
*/
|
||||
HRESULT WINAPI VariantTimeToSystemTime( double vtime, LPSYSTEMTIME lpSystemTime )
|
||||
{
|
||||
double t = 0, timeofday = 0;
|
||||
|
||||
static const BYTE Days_Per_Month[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
static const BYTE Days_Per_Month_LY[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
|
||||
/* The Month_Code is used to find the Day of the Week (LY = LeapYear)*/
|
||||
static const BYTE Month_Code[] = {0, 1, 4, 4, 0, 2, 5, 0, 3, 6, 1, 4, 6};
|
||||
static const BYTE Month_Code_LY[] = {0, 0, 3, 4, 0, 2, 5, 0, 3, 6, 1, 4, 6};
|
||||
|
||||
/* The Century_Code is used to find the Day of the Week */
|
||||
static const BYTE Century_Code[] = {0, 6, 4, 2};
|
||||
|
||||
struct tm r;
|
||||
|
||||
TRACE(" Variant = %f SYSTEMTIME ptr %p\n", vtime, lpSystemTime);
|
||||
|
||||
if (vtime >= 0)
|
||||
{
|
||||
|
||||
if (DateToTm(vtime, 0, &r ) <= 0) return 0;
|
||||
|
||||
lpSystemTime->wSecond = r.tm_sec;
|
||||
lpSystemTime->wMinute = r.tm_min;
|
||||
lpSystemTime->wHour = r.tm_hour;
|
||||
lpSystemTime->wDay = r.tm_mday;
|
||||
lpSystemTime->wMonth = r.tm_mon;
|
||||
|
||||
if (lpSystemTime->wMonth == 12)
|
||||
lpSystemTime->wMonth = 1;
|
||||
else
|
||||
lpSystemTime->wMonth++;
|
||||
|
||||
lpSystemTime->wYear = r.tm_year;
|
||||
}
|
||||
else
|
||||
{
|
||||
vtime = -1*vtime;
|
||||
|
||||
if (DateToTm(vtime, 0, &r ) <= 0) return 0;
|
||||
|
||||
lpSystemTime->wSecond = r.tm_sec;
|
||||
lpSystemTime->wMinute = r.tm_min;
|
||||
lpSystemTime->wHour = r.tm_hour;
|
||||
|
||||
lpSystemTime->wMonth = 13 - r.tm_mon;
|
||||
|
||||
if (lpSystemTime->wMonth == 1)
|
||||
lpSystemTime->wMonth = 12;
|
||||
else
|
||||
lpSystemTime->wMonth--;
|
||||
|
||||
lpSystemTime->wYear = 1899 - (r.tm_year - 1900);
|
||||
|
||||
if (!isleap(lpSystemTime->wYear) )
|
||||
lpSystemTime->wDay = Days_Per_Month[13 - lpSystemTime->wMonth] - r.tm_mday;
|
||||
else
|
||||
lpSystemTime->wDay = Days_Per_Month_LY[13 - lpSystemTime->wMonth] - r.tm_mday;
|
||||
|
||||
|
||||
}
|
||||
|
||||
if (!isleap(lpSystemTime->wYear))
|
||||
{
|
||||
/*
|
||||
(Century_Code+Month_Code+Year_Code+Day) % 7
|
||||
|
||||
The century code repeats every 400 years , so the array
|
||||
works out like this,
|
||||
|
||||
Century_Code[0] is for 16th/20th Centry
|
||||
Century_Code[1] is for 17th/21th Centry
|
||||
Century_Code[2] is for 18th/22th Centry
|
||||
Century_Code[3] is for 19th/23th Centry
|
||||
|
||||
The year code is found with the formula (year + (year / 4))
|
||||
the "year" must be between 0 and 99 .
|
||||
|
||||
The Month Code (Month_Code[1]) starts with January and
|
||||
ends with December.
|
||||
*/
|
||||
|
||||
lpSystemTime->wDayOfWeek = (
|
||||
Century_Code[(( (lpSystemTime->wYear+100) - lpSystemTime->wYear%100) /100) %4]+
|
||||
((lpSystemTime->wYear%100)+(lpSystemTime->wYear%100)/4)+
|
||||
Month_Code[lpSystemTime->wMonth]+
|
||||
lpSystemTime->wDay) % 7;
|
||||
|
||||
if (lpSystemTime->wDayOfWeek == 0) lpSystemTime->wDayOfWeek = 7;
|
||||
else lpSystemTime->wDayOfWeek -= 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
lpSystemTime->wDayOfWeek = (
|
||||
Century_Code[(((lpSystemTime->wYear+100) - lpSystemTime->wYear%100)/100)%4]+
|
||||
((lpSystemTime->wYear%100)+(lpSystemTime->wYear%100)/4)+
|
||||
Month_Code_LY[lpSystemTime->wMonth]+
|
||||
lpSystemTime->wDay) % 7;
|
||||
|
||||
if (lpSystemTime->wDayOfWeek == 0) lpSystemTime->wDayOfWeek = 7;
|
||||
else lpSystemTime->wDayOfWeek -= 1;
|
||||
}
|
||||
|
||||
t = floor(vtime);
|
||||
timeofday = vtime - t;
|
||||
|
||||
lpSystemTime->wMilliseconds = (timeofday
|
||||
- lpSystemTime->wHour*(1/24)
|
||||
- lpSystemTime->wMinute*(1/1440)
|
||||
- lpSystemTime->wSecond*(1/86400) )*(1/5184000);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/***********************************************************************
|
||||
* VarUdateFromDate [OLEAUT32.331]
|
||||
*/
|
||||
HRESULT WINAPI VarUdateFromDate( DATE datein, ULONG dwFlags, UDATE *pudateout)
|
||||
{
|
||||
HRESULT i = 0;
|
||||
static const BYTE Days_Per_Month[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
static const BYTE Days_Per_Month_LY[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
|
||||
TRACE("DATE = %f\n", (double)datein);
|
||||
i = VariantTimeToSystemTime(datein, &(pudateout->st) );
|
||||
|
||||
if (i)
|
||||
{
|
||||
pudateout->wDayOfYear = 0;
|
||||
|
||||
if (isleap(pudateout->st.wYear))
|
||||
{
|
||||
for (i =1; i<pudateout->st.wMonth; i++)
|
||||
pudateout->wDayOfYear += Days_Per_Month[i];
|
||||
}
|
||||
else
|
||||
{
|
||||
for (i =1; i<pudateout->st.wMonth; i++)
|
||||
pudateout->wDayOfYear += Days_Per_Month_LY[i];
|
||||
}
|
||||
|
||||
pudateout->wDayOfYear += pudateout->st.wDay;
|
||||
dwFlags = 0; /*VAR_VALIDDATE*/
|
||||
}
|
||||
else dwFlags = 0;
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
/***********************************************************************
|
||||
* VarDateFromUdate [OLEAUT32.330]
|
||||
*/
|
||||
HRESULT WINAPI VarDateFromUdate(UDATE *pudateout,
|
||||
ULONG dwFlags, DATE *datein)
|
||||
{
|
||||
HRESULT i;
|
||||
double t = 0;
|
||||
TRACE(" %d/%d/%d %d:%d:%d\n",
|
||||
pudateout->st.wMonth, pudateout->st.wDay,
|
||||
pudateout->st.wYear, pudateout->st.wHour,
|
||||
pudateout->st.wMinute, pudateout->st.wSecond);
|
||||
|
||||
|
||||
i = SystemTimeToVariantTime(&(pudateout->st), &t);
|
||||
*datein = t;
|
||||
|
||||
if (i) return S_OK;
|
||||
else return E_INVALIDARG;
|
||||
}
|
||||
|
||||
|
||||
/**********************************************************************
|
||||
* VarBstrCmp [OLEAUT32.314]
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in a new issue