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0220eddac6
Subsequent patches in the series convert inode timestamps
to use struct timespec64 instead of struct timespec as
part of solving the y2038 problem.
commit fd3cfad374 ("udf: Convert udf_disk_stamp_to_time() to use mktime64()")
eliminated the NULL return condition from udf_disk_stamp_to_time().
udf_time_to_disk_time() is always called with a valid dest pointer and
the return value is ignored.
Further, caller can as well check the dest pointer being passed in rather
than return argument.
Make both the functions return void.
This will make the inode timestamp conversion simpler.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: jack@suse.com
----
Changes from v1:
* fixed the pointer error pointed by Jan
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Paul Eggert (eggert@twinsun.com).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/*
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* dgb 10/02/98: ripped this from glibc source to help convert timestamps
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* to unix time
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* 10/04/98: added new table-based lookup after seeing how ugly
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* the gnu code is
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* blf 09/27/99: ripped out all the old code and inserted new table from
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* John Brockmeyer (without leap second corrections)
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* rewrote udf_stamp_to_time and fixed timezone accounting in
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* udf_time_to_stamp.
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*/
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/*
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* We don't take into account leap seconds. This may be correct or incorrect.
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* For more NIST information (especially dealing with leap seconds), see:
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* http://www.boulder.nist.gov/timefreq/pubs/bulletin/leapsecond.htm
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*/
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#include "udfdecl.h"
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/time.h>
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void
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udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
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{
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u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone);
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u16 year = le16_to_cpu(src.year);
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uint8_t type = typeAndTimezone >> 12;
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int16_t offset;
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if (type == 1) {
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offset = typeAndTimezone << 4;
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/* sign extent offset */
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offset = (offset >> 4);
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if (offset == -2047) /* unspecified offset */
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offset = 0;
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} else
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offset = 0;
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dest->tv_sec = mktime64(year, src.month, src.day, src.hour, src.minute,
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src.second);
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dest->tv_sec -= offset * 60;
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dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
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src.hundredsOfMicroseconds * 100 + src.microseconds);
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/*
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* Sanitize nanosecond field since reportedly some filesystems are
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* recorded with bogus sub-second values.
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*/
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dest->tv_nsec %= NSEC_PER_SEC;
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}
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void
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udf_time_to_disk_stamp(struct timestamp *dest, struct timespec ts)
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{
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long seconds;
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int16_t offset;
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struct tm tm;
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offset = -sys_tz.tz_minuteswest;
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dest->typeAndTimezone = cpu_to_le16(0x1000 | (offset & 0x0FFF));
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seconds = ts.tv_sec + offset * 60;
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time64_to_tm(seconds, 0, &tm);
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dest->year = cpu_to_le16(tm.tm_year + 1900);
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dest->month = tm.tm_mon + 1;
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dest->day = tm.tm_mday;
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dest->hour = tm.tm_hour;
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dest->minute = tm.tm_min;
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dest->second = tm.tm_sec;
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dest->centiseconds = ts.tv_nsec / 10000000;
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dest->hundredsOfMicroseconds = (ts.tv_nsec / 1000 -
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dest->centiseconds * 10000) / 100;
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dest->microseconds = (ts.tv_nsec / 1000 - dest->centiseconds * 10000 -
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dest->hundredsOfMicroseconds * 100);
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}
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/* EOF */
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