Release 4.18 fs/udf/udftime.c

/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Paul Eggert (eggert@twinsun.com).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 * dgb 10/02/98: ripped this from glibc source to help convert timestamps
 *               to unix time
 *     10/04/98: added new table-based lookup after seeing how ugly
 *               the gnu code is
 * blf 09/27/99: ripped out all the old code and inserted new table from
 *               John Brockmeyer (without leap second corrections)
 *               rewrote udf_stamp_to_time and fixed timezone accounting in
 *               udf_time_to_stamp.
 */

/*
 * We don't take into account leap seconds. This may be correct or incorrect.
 * For more NIST information (especially dealing with leap seconds), see:
 * http://www.boulder.nist.gov/timefreq/pubs/bulletin/leapsecond.htm
 */

#include "udfdecl.h"

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/time.h>


void

udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
{
	u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone);
	u16 year = le16_to_cpu(src.year);
	uint8_t type = typeAndTimezone >> 12;
	int16_t offset;

	if (type == 1) {
		offset = typeAndTimezone << 4;
		/* sign extent offset */
		offset = (offset >> 4);
		if (offset == -2047) /* unspecified offset */
			offset = 0;
	} else
		offset = 0;

	dest->tv_sec = mktime64(year, src.month, src.day, src.hour, src.minute,
			src.second);
	dest->tv_sec -= offset * 60;
	dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
			src.hundredsOfMicroseconds * 100 + src.microseconds);
	/*
         * Sanitize nanosecond field since reportedly some filesystems are
         * recorded with bogus sub-second values.
         */
	dest->tv_nsec %= NSEC_PER_SEC;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
82
53.95%
2
20.00%
Marcin Ślusarz
33
21.71%
2
20.00%
Jan Kara
22
14.47%
2
20.00%
Linus Torvalds
12
7.89%
1
10.00%
Ben Fennema
1
0.66%
1
10.00%
Pekka J Enberg
1
0.66%
1
10.00%
Deepa Dinamani
1
0.66%
1
10.00%
Total
152
100.00%
10
100.00%


void

udf_time_to_disk_stamp(struct timestamp *dest, struct timespec ts)
{
	long seconds;
	int16_t offset;
	struct tm tm;

	offset = -sys_tz.tz_minuteswest;

	dest->typeAndTimezone = cpu_to_le16(0x1000 | (offset & 0x0FFF));

	seconds = ts.tv_sec + offset * 60;
	time64_to_tm(seconds, 0, &tm);
	dest->year = cpu_to_le16(tm.tm_year + 1900);
	dest->month = tm.tm_mon + 1;
	dest->day = tm.tm_mday;
	dest->hour = tm.tm_hour;
	dest->minute = tm.tm_min;
	dest->second = tm.tm_sec;
	dest->centiseconds = ts.tv_nsec / 10000000;
	dest->hundredsOfMicroseconds = (ts.tv_nsec / 1000 -
					dest->centiseconds * 10000) / 100;
	dest->microseconds = (ts.tv_nsec / 1000 - dest->centiseconds * 10000 -
			      dest->hundredsOfMicroseconds * 100);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
100
57.14%
2
25.00%
Jan Kara
48
27.43%
1
12.50%
Ben Fennema
20
11.43%
2
25.00%
Marcin Ślusarz
5
2.86%
1
12.50%
Deepa Dinamani
1
0.57%
1
12.50%
Pekka J Enberg
1
0.57%
1
12.50%
Total
175
100.00%
8
100.00%

/* EOF */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
190
55.39%
2
13.33%
Jan Kara
73
21.28%
3
20.00%
Marcin Ślusarz
39
11.37%
3
20.00%
Ben Fennema
21
6.12%
2
13.33%
Linus Torvalds
12
3.50%
1
6.67%
Joe Perches
3
0.87%
1
6.67%
Deepa Dinamani
2
0.58%
1
6.67%
Pekka J Enberg
2
0.58%
1
6.67%
Cyrill V. Gorcunov
1
0.29%
1
6.67%
Total
343
100.00%
15
100.00%
Directory: fs/udf

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