299 lines
9.9 KiB
C++
299 lines
9.9 KiB
C++
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// Time functions
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#include "priv.h"
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#include "w95wraps.h"
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#include "ids.h"
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#include <mluisupp.h>
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#ifndef DATE_LTRREADING
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#define DATE_LTRREADING 0x00000010 //BUGBUG
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#define DATE_RTLREADING 0x00000020 //BUGBUG
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#endif
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/*
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Purpose: Calls GetDateFormat and tries to replace the day with
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a relative reference like "Today" or "Yesterday".
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Returns the count of characters written to pszBuf.
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*/
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int GetRelativeDateFormat(
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DWORD dwDateFlags,
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DWORD * pdwFlags,
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SYSTEMTIME * pstDate,
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LPWSTR pszBuf,
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int cchBuf)
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{
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int cch;
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ASSERT(pdwFlags);
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ASSERT(pstDate);
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ASSERT(pszBuf);
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// Assume that no relative date is applied, so clear the bit
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// for now.
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*pdwFlags &= ~FDTF_RELATIVE;
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// Get the Win32 date format. (GetDateFormat's return value includes
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// the null terminator.)
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cch = GetDateFormat(LOCALE_USER_DEFAULT, dwDateFlags, pstDate, NULL, pszBuf, cchBuf);
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if (0 < cch)
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{
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SYSTEMTIME stCurrentTime;
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int iDay = 0; // 1 = today, -1 = yesterday, 0 = neither today nor yesterday.
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// Now see if the date merits a replacement to "Yesterday" or "Today".
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GetLocalTime(&stCurrentTime); // get the current date
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// Does it match the current day?
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if (pstDate->wYear == stCurrentTime.wYear && pstDate->wMonth == stCurrentTime.wMonth && pstDate->wDay == stCurrentTime.wDay)
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{
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iDay = 1;// Yes
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}
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else
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{
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// No; maybe it matches yesterday
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FILETIME ftYesterday;
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SYSTEMTIME stYesterday;
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// Compute yesterday's date by converting to FILETIME,
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// subtracting one day, then converting back.
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SystemTimeToFileTime(&stCurrentTime, &ftYesterday);
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FILETIMEtoInt64(ftYesterday) -= FT_ONEDAY;
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FileTimeToSystemTime(&ftYesterday, &stYesterday);
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// Does it match yesterday?
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if (pstDate->wYear == stYesterday.wYear && pstDate->wMonth == stYesterday.wMonth && pstDate->wDay == stYesterday.wDay)
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{
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iDay = -1;// Yes
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}
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}
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// Should we try replacing the day?
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if (0 != iDay)
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{
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// Yes
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TCHAR szDayOfWeek[32];
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LPTSTR pszModifier;
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int cchDayOfWeek;
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cchDayOfWeek = MLLoadString((IDS_DAYSOFTHEWEEK + pstDate->wDayOfWeek), szDayOfWeek, SIZECHARS(szDayOfWeek));
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// Search for the day of week text in the string we got back.
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// Depending on the user's regional settings, there might not be a day in the long-date format...
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pszModifier = StrStr(pszBuf, szDayOfWeek);
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if (pszModifier)
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{
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// We found the day in the string, so replace it with
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// "Today" or "Yesterday"
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TCHAR szTemp[64];
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TCHAR szRelativeDay[32];
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int cchRelativeDay;
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// Save the tail end (the part after the "Monday" string)
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lstrcpyn(szTemp, &pszModifier[cchDayOfWeek], SIZECHARS(szTemp));
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// Load the appropriate string ("Yesterday" or "Today").
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// If the string is empty (localizers might need to do this
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// if this logic isn't locale-friendly), don't bother doing
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// anything.
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cchRelativeDay = MLLoadString((1 == iDay) ? IDS_TODAY : IDS_YESTERDAY, szRelativeDay, SIZECHARS(szRelativeDay));
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if (0 < cchRelativeDay)
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{
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// Make sure that we have enough room for the replacement
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// (cch already accounts for the null terminator)
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if (cch - cchDayOfWeek + cchRelativeDay <= cchBuf)
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{
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// copy the friendly name over the day of the week
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lstrcpy(pszModifier, szRelativeDay);
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// put back the tail end
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lstrcat(pszModifier, szTemp);
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cch = cch - cchDayOfWeek + cchRelativeDay;
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*pdwFlags |= FDTF_RELATIVE;
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}
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}
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}
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}
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}
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return cch;
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}
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#define LRM 0x200E // UNICODE Left-to-right mark control character
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#define RLM 0x200F // UNICODE Left-to-right mark control character
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/*
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Purpose: Constructs a displayname form of the file time.
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*pdwFlags may be NULL, in which case FDTF_DEFAULT is assumed. Other
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valid flags are:
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FDTF_DEFAULT "3/29/98 7:48 PM"
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FDTF_SHORTTIME "7:48 PM"
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FDTF_SHORTDATE "3/29/98"
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FDTF_LONGDATE "Monday, March 29, 1998"
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FDTF_LONGTIME "7:48:33 PM"
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FDTF_RELATIVE only works with FDTF_LONGDATE. If possible,
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replace the day with "Yesterday" or "Today":
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"Yesterday, March 29, 1998"
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This function updates *pdwFlags to indicate which sections of the
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string were actually set. For example, if FDTF_RELATIVE is passed
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in, but no relative date conversion was performed, then FDTF_RELATIVE
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is cleared before returning.
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If the date is the magic "Sorry, I don't know what date it is" value
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that FAT uses, then we return an empty string.
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*/
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STDAPI_(int) SHFormatDateTimeW(const FILETIME * pft, DWORD * pdwFlags, LPWSTR pszBuf, UINT cchBuf)
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{
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int cchBufSav = cchBuf;
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DWORD dwFlags;
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FILETIME ft;
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ASSERT(IS_VALID_READ_PTR(pft, FILETIME));
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ASSERT(IS_VALID_WRITE_BUFFER(pszBuf, WCHAR, cchBuf));
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ASSERT(NULL == pdwFlags || IS_VALID_WRITE_PTR(pdwFlags, DWORD));
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FileTimeToLocalFileTime(pft, &ft);
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if (FILETIMEtoInt64(*pft) == FT_NTFS_UNKNOWNGMT ||
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FILETIMEtoInt64( ft) == FT_FAT_UNKNOWNLOCAL)
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{
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// This date is uninitialized. Don't show a bogus "10/10/72" string.
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if (0 < cchBuf)
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*pszBuf = 0;
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dwFlags = 0;
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}
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else if (0 < cchBuf)
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{
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int cch;
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SYSTEMTIME st;
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DWORD dwDateFlags = DATE_SHORTDATE; // default
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DWORD dwTimeFlags = TIME_NOSECONDS; // default
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if (pdwFlags)
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dwFlags = *pdwFlags;
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else
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dwFlags = FDTF_DEFAULT;
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// Initialize the flags we're going to use
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if (dwFlags & FDTF_LONGDATE)
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dwDateFlags = DATE_LONGDATE;
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else
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dwFlags &= ~FDTF_RELATIVE; // can't show relative dates w/o long dates
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if (dwFlags & FDTF_LTRDATE)
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dwDateFlags |= DATE_LTRREADING;
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else if(dwFlags & FDTF_RTLDATE)
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dwDateFlags |= DATE_RTLREADING;
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if (dwFlags & FDTF_LONGTIME)
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dwTimeFlags &= ~TIME_NOSECONDS;
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FileTimeToSystemTime(&ft, &st);
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cchBuf--; // Account for null terminator first
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if (dwFlags & (FDTF_LONGDATE | FDTF_SHORTDATE))
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{
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// Get the date
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if (dwFlags & FDTF_RELATIVE)
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cch = GetRelativeDateFormat(dwDateFlags, &dwFlags, &st, pszBuf, cchBuf);
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else
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cch = GetDateFormat(LOCALE_USER_DEFAULT, dwDateFlags, &st, NULL, pszBuf, cchBuf);
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if (0 < cch)
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cch--; // (null terminator was counted above, so don't count it again)
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else
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dwFlags &= ~(FDTF_LONGDATE | FDTF_SHORTDATE); // no date, so clear these bits
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cchBuf -= cch;
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pszBuf += cch;
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// Are we tacking on the time too?
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if (dwFlags & (FDTF_SHORTTIME | FDTF_LONGTIME))
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{
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// Yes; for long dates, separate with a comma, otherwise
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// separate with a space.
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if (dwFlags & FDTF_LONGDATE)
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{
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WCHAR szT[8];
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cch = MLLoadString(IDS_LONGDATE_SEP, szT, SIZECHARS(szT));
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lstrcatn(pszBuf, szT, cchBuf);
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cchBuf -= cch;
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pszBuf += cch;
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}
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else
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{
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*pszBuf++ = TEXT(' ');
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*pszBuf = 0; // (in case GetTimeFormat doesn't add anything)
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cchBuf--;
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}
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// [msadek]; need to insert strong a Unicode control character to simulate
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// a strong run in the opposite base direction to enforce
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// correct display of concatinated string in all cases
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if(dwFlags & FDTF_RTLDATE)
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{
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*pszBuf++ = LRM; // simulate an opposite run
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*pszBuf++ = RLM; // force RTL display of the time part.
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*pszBuf = 0;
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cchBuf -= 2;
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}
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else if(dwFlags & FDTF_LTRDATE)
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{
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*pszBuf++ = RLM; // simulate an opposite run
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*pszBuf++ = LRM; // force LTR display of the time part.
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*pszBuf = 0;
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cchBuf -= 2;
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}
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}
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}
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if (dwFlags & (FDTF_SHORTTIME | FDTF_LONGTIME))
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{
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// Get the time
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cch = GetTimeFormat(LOCALE_USER_DEFAULT, dwTimeFlags, &st, NULL, pszBuf, cchBuf);
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if (0 < cch)
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cch--; // (null terminator was counted above, so don't count it again)
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else
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dwFlags &= ~(FDTF_LONGTIME | FDTF_SHORTTIME); // no time, so clear these bits
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cchBuf -= cch;
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}
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}
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if (pdwFlags)
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*pdwFlags = dwFlags;
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return cchBufSav - cchBuf;
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}
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/*
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Purpose: See the defn for SHFormatDateTimeW.
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*/
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STDAPI_(int) SHFormatDateTimeA(const FILETIME * pft, DWORD * pdwFlags, LPSTR pszBuf, UINT cchBuf)
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{
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int cchRet;
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WCHAR wsz[256];
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cchRet = SHFormatDateTimeW(pft, pdwFlags, wsz, SIZECHARS(wsz));
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if (0 < cchRet)
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{
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cchRet = SHUnicodeToAnsi(wsz, pszBuf, cchBuf);
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}
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else if (0 < cchBuf)
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*pszBuf = 0;
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return cchRet;
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}
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