133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
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* Copyright (C) 2009 Mamadou Diop.
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*
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* Contact: Mamadou Diop <diopmamadou@yahoo.fr>
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DOUBANGO.
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*
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*/
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/**@file tsk_time.c
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* @brief Useful datetime functions.
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*
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* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
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*
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* @date Created: Sat Nov 8 16:54:58 2009 mdiop
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*/
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#include "tsk_time.h"
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#if TSK_UNDER_WINDOWS
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# ifdef _WIN32_WCE
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# include <Winsock2.h> // timeval
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# endif
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# include <windows.h>
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#elif defined(__SYMBIAN32__)
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# include <_timeval.h>
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#endif
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#include <time.h>
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/**@defgroup tsk_time_group Useful datetime functions
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*/
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#if !HAVE_GETTIMEOFDAY
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#if TSK_UNDER_WINDOWS
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/* Thanks to "http://www.cpp-programming.net/c-tidbits/gettimeofday-function-for-windows" */
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#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
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#define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
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#else
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#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
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#endif
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struct timezone
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{
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int tz_minuteswest; /* minutes W of Greenwich */
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int tz_dsttime; /* type of dst correction */
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};
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int gettimeofday(struct timeval *tv, struct timezone *tz)
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{
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FILETIME ft;
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uint64_t tmpres = 0;
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static int tzflag = 0;
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if(tv)
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{
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#ifdef _WIN32_WCE
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SYSTEMTIME st;
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GetSystemTime(&st);
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SystemTimeToFileTime(&st, &ft);
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#else
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GetSystemTimeAsFileTime(&ft);
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#endif
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tmpres |= ft.dwHighDateTime;
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tmpres <<= 32;
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tmpres |= ft.dwLowDateTime;
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/*converting file time to unix epoch*/
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tmpres /= 10; /*convert into microseconds*/
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tmpres -= DELTA_EPOCH_IN_MICROSECS;
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tv->tv_sec = (long)(tmpres / 1000000UL);
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tv->tv_usec = (long)(tmpres % 1000000UL);
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}
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if (tz)
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{
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if (!tzflag)
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{
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_tzset();
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tzflag++;
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}
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tz->tz_minuteswest = _timezone / 60;
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tz->tz_dsttime = _daylight;
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}
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return 0;
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}
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#else
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#pragma error "You MUST provide an implement for 'gettimeofday'"
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#endif /* WIN32 */
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#endif /* !HAVE_GETTIMEOFDAY */
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/**
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* The tsk_gettimeofday() function shall obtain the current time, expressed as seconds and microseconds since EPOCH (00:00:00 UTC on 1 January 1970).
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* The resolution of the system clock is unspecified.
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* @param tv The current time, expressed as seconds and microseconds since EPOCH(00:00:00 UTC on 1 January 1970).
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* @param tz The timezone.
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* @retval The tsk_gettimeofday() function shall return 0 and no value shall be reserved to indicate an error.
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*/
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int tsk_gettimeofday(struct timeval *tv, struct timezone *tz)
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{
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return gettimeofday(tv, tz);
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}
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/**
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* Gets the number of milliseconds since the EPOCH.
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* @retval The number of milliseconds since EPOCH.
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*/
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uint64_t tsk_time_epoch()
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{
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struct timeval tv;
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static const uint64_t thousand = 1000;
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gettimeofday(&tv, 0);
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return (((uint64_t)tv.tv_sec)*thousand) + (((uint64_t)tv.tv_usec)/thousand);
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}
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