/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/Win32/pnUtW32Time.cpp
*   
***/

#include "../../Pch.h"
#pragma hdrstop


/*****************************************************************************
*
*   Local functions
*
***/

//============================================================================
static void FormatTime (
    qword		time,
    wchar const	dateFmt[],
    wchar const	timeFmt[],
    unsigned	chars,
    wchar *		buffer
) {
	COMPILER_ASSERT(sizeof(FILETIME) == sizeof(qword));

	SYSTEMTIME sysTime;
	FileTimeToSystemTime((FILETIME *)&time, &sysTime);

	unsigned offset = GetDateFormatW(
		LOCALE_SYSTEM_DEFAULT,
		0,
		&sysTime,
		dateFmt,
		buffer,
		chars
	);

	if (timeFmt) {
		// if we printed any characters, move offset back to overwrite the string terminator
		if (offset)
		--offset;

		offset += GetTimeFormatW(
			LOCALE_SYSTEM_DEFAULT,
			0,
			&sysTime,
			timeFmt,
			buffer + offset,
			chars - offset
		);
	}

	// if we didn't print any characters, NULL terminate the buffer
	if (!offset && chars)
		buffer[0] = 0;
}


/*****************************************************************************
*
*   Exported functions
*
***/

#ifdef HS_BUILD_FOR_WIN32

//===========================================================================
void TimeGetDesc (
    qword       time,
    TimeDesc *  desc
) {
    ASSERT(desc);

    SYSTEMTIME sysTime;
    COMPILER_ASSERT(sizeof(qword) == sizeof(FILETIME));
    FileTimeToSystemTime((FILETIME *) &time, &sysTime);

    desc->year      = sysTime.wYear;
    desc->month     = sysTime.wMonth;
    desc->day       = sysTime.wDay;
    desc->dayOfWeek = sysTime.wDayOfWeek;
    desc->hour      = sysTime.wHour;
    desc->minute    = sysTime.wMinute;
    desc->second    = sysTime.wSecond;
}

//============================================================================
qword TimeGetTime () {
    qword time;
    COMPILER_ASSERT(sizeof(qword) == sizeof(FILETIME));
    GetSystemTimeAsFileTime((FILETIME *) &time);
    return time;
}

//============================================================================
qword TimeGetLocalTime () {
    qword time;
    COMPILER_ASSERT(sizeof(qword) == sizeof(FILETIME));
    GetSystemTimeAsFileTime((FILETIME *) &time);
    FileTimeToLocalFileTime((FILETIME *) &time, (FILETIME *) &time);
    return time;
}

//============================================================================
void TimePrettyPrint (
	qword       time,
	unsigned    chars,
	wchar *     buffer
) {
	FormatTime(
		time,
		L"ddd MMM dd',' yyyy ",
		L"hh':'mm':'ss tt",
		chars,
		buffer
	);
}


#endif // HS_BUILD_FOR_WIN32