mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-11-02 01:25:05 +01:00
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*
|
|
* ntfstime.h - NTFS time related functions. Originated from the Linux-NTFS project.
|
|
*
|
|
* Copyright (c) 2005 Anton Altaparmakov
|
|
* Copyright (c) 2005 Yura Pakhuchiy
|
|
* Copyright (c) 2010 Jean-Pierre Andre
|
|
*
|
|
* This program/include file 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 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program/include file 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 (in the main directory of the NTFS-3G
|
|
* distribution in the file COPYING); if not, write to the Free Software
|
|
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _NTFS_NTFSTIME_H
|
|
#define _NTFS_NTFSTIME_H
|
|
|
|
#ifdef HAVE_TIME_H
|
|
#include <time.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#ifdef HAVE_GETTIMEOFDAY
|
|
#include <sys/time.h>
|
|
#endif
|
|
|
|
#include "types.h"
|
|
|
|
/*
|
|
* There are four times more conversions of internal representation
|
|
* to ntfs representation than any other conversion, so the most
|
|
* efficient internal representation is ntfs representation
|
|
* (with low endianness)
|
|
*/
|
|
typedef sle64 ntfs_time;
|
|
|
|
#define NTFS_TIME_OFFSET ((s64)(369 * 365 + 89) * 24 * 3600 * 10000000)
|
|
|
|
/**
|
|
* ntfs2timespec - Convert an NTFS time to Unix time
|
|
* @ntfs_time: An NTFS time in 100ns units since 1601
|
|
*
|
|
* NTFS stores times as the number of 100ns intervals since January 1st 1601 at
|
|
* 00:00 UTC. This system will not suffer from Y2K problems until ~57000AD.
|
|
*
|
|
* Return: A Unix time (number of seconds since 1970, and nanoseconds)
|
|
*/
|
|
static __inline__ struct timespec ntfs2timespec(ntfs_time ntfstime)
|
|
{
|
|
struct timespec spec;
|
|
s64 cputime;
|
|
|
|
cputime = sle64_to_cpu(ntfstime);
|
|
spec.tv_sec = (cputime - (NTFS_TIME_OFFSET)) / 10000000;
|
|
spec.tv_nsec = (cputime - (NTFS_TIME_OFFSET)
|
|
- (s64)spec.tv_sec*10000000)*100;
|
|
/* force zero nsec for overflowing dates */
|
|
if ((spec.tv_nsec < 0) || (spec.tv_nsec > 999999999))
|
|
spec.tv_nsec = 0;
|
|
return (spec);
|
|
}
|
|
|
|
/**
|
|
* timespec2ntfs - Convert Linux time to NTFS time
|
|
* @utc_time: Linux time to convert to NTFS
|
|
*
|
|
* Convert the Linux time @utc_time to its corresponding NTFS time.
|
|
*
|
|
* Linux stores time in a long at present and measures it as the number of
|
|
* 1-second intervals since 1st January 1970, 00:00:00 UTC
|
|
* with a separated non-negative nanosecond value
|
|
*
|
|
* NTFS uses Microsoft's standard time format which is stored in a sle64 and is
|
|
* measured as the number of 100 nano-second intervals since 1st January 1601,
|
|
* 00:00:00 UTC.
|
|
*
|
|
* Return: An NTFS time (100ns units since Jan 1601)
|
|
*/
|
|
static __inline__ ntfs_time timespec2ntfs(struct timespec spec)
|
|
{
|
|
s64 units;
|
|
|
|
units = (s64)spec.tv_sec * 10000000
|
|
+ NTFS_TIME_OFFSET + spec.tv_nsec/100;
|
|
return (cpu_to_le64(units));
|
|
}
|
|
|
|
/*
|
|
* Return the current time in ntfs format
|
|
*/
|
|
|
|
static __inline__ ntfs_time ntfs_current_time(void)
|
|
{
|
|
struct timespec now;
|
|
|
|
#if defined(HAVE_CLOCK_GETTIME) || defined(HAVE_SYS_CLOCK_GETTIME)
|
|
clock_gettime(CLOCK_REALTIME, &now);
|
|
#elif defined(HAVE_GETTIMEOFDAY)
|
|
struct timeval microseconds;
|
|
|
|
gettimeofday(µseconds, (struct timezone*)NULL);
|
|
now.tv_sec = microseconds.tv_sec;
|
|
now.tv_nsec = microseconds.tv_usec*1000;
|
|
#else
|
|
now.tv_sec = time((time_t*)NULL);
|
|
now.tv_nsec = 0;
|
|
#endif
|
|
return (timespec2ntfs(now));
|
|
}
|
|
|
|
#endif /* _NTFS_NTFSTIME_H */
|