kernel-ark/fs/udf/udftime.c
Cyrill Gorcunov b1e7a4b1bb UDF: coding style fixups
This patch does additional coding style fixup.  Initially the code is being
distorted by Lindent (in my patches sent not very long ago) and fixed in
the followup patches but this stuff was accidently missed.

New and old compiled files were compared with cmp to check for being
identically.  So the patch will not break the kernel.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:58 -07:00

168 lines
5.6 KiB
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 <linux/types.h>
#include <linux/kernel.h>
#include "udfdecl.h"
#define EPOCH_YEAR 1970
#ifndef __isleap
/* Nonzero if YEAR is a leap year (every 4 years,
except every 100th isn't, and every 400th is). */
#define __isleap(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
#endif
/* How many days come before each month (0-12). */
static const unsigned short int __mon_yday[2][13] = {
/* Normal years. */
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
/* Leap years. */
{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
};
#define MAX_YEAR_SECONDS 69
#define SPD 0x15180 /*3600*24 */
#define SPY(y,l,s) (SPD * (365*y+l)+s)
static time_t year_seconds[MAX_YEAR_SECONDS]= {
/*1970*/ SPY( 0, 0,0), SPY( 1, 0,0), SPY( 2, 0,0), SPY( 3, 1,0),
/*1974*/ SPY( 4, 1,0), SPY( 5, 1,0), SPY( 6, 1,0), SPY( 7, 2,0),
/*1978*/ SPY( 8, 2,0), SPY( 9, 2,0), SPY(10, 2,0), SPY(11, 3,0),
/*1982*/ SPY(12, 3,0), SPY(13, 3,0), SPY(14, 3,0), SPY(15, 4,0),
/*1986*/ SPY(16, 4,0), SPY(17, 4,0), SPY(18, 4,0), SPY(19, 5,0),
/*1990*/ SPY(20, 5,0), SPY(21, 5,0), SPY(22, 5,0), SPY(23, 6,0),
/*1994*/ SPY(24, 6,0), SPY(25, 6,0), SPY(26, 6,0), SPY(27, 7,0),
/*1998*/ SPY(28, 7,0), SPY(29, 7,0), SPY(30, 7,0), SPY(31, 8,0),
/*2002*/ SPY(32, 8,0), SPY(33, 8,0), SPY(34, 8,0), SPY(35, 9,0),
/*2006*/ SPY(36, 9,0), SPY(37, 9,0), SPY(38, 9,0), SPY(39,10,0),
/*2010*/ SPY(40,10,0), SPY(41,10,0), SPY(42,10,0), SPY(43,11,0),
/*2014*/ SPY(44,11,0), SPY(45,11,0), SPY(46,11,0), SPY(47,12,0),
/*2018*/ SPY(48,12,0), SPY(49,12,0), SPY(50,12,0), SPY(51,13,0),
/*2022*/ SPY(52,13,0), SPY(53,13,0), SPY(54,13,0), SPY(55,14,0),
/*2026*/ SPY(56,14,0), SPY(57,14,0), SPY(58,14,0), SPY(59,15,0),
/*2030*/ SPY(60,15,0), SPY(61,15,0), SPY(62,15,0), SPY(63,16,0),
/*2034*/ SPY(64,16,0), SPY(65,16,0), SPY(66,16,0), SPY(67,17,0),
/*2038*/ SPY(68,17,0)
};
extern struct timezone sys_tz;
#define SECS_PER_HOUR (60 * 60)
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
time_t *udf_stamp_to_time(time_t *dest, long *dest_usec, kernel_timestamp src)
{
int yday;
uint8_t type = src.typeAndTimezone >> 12;
int16_t offset;
if (type == 1) {
offset = src.typeAndTimezone << 4;
/* sign extent offset */
offset = (offset >> 4);
if (offset == -2047) /* unspecified offset */
offset = 0;
} else {
offset = 0;
}
if ((src.year < EPOCH_YEAR) ||
(src.year >= EPOCH_YEAR + MAX_YEAR_SECONDS)) {
*dest = -1;
*dest_usec = -1;
return NULL;
}
*dest = year_seconds[src.year - EPOCH_YEAR];
*dest -= offset * 60;
yday = ((__mon_yday[__isleap(src.year)][src.month - 1]) + src.day - 1);
*dest += (((yday * 24) + src.hour) * 60 + src.minute) * 60 + src.second;
*dest_usec = src.centiseconds * 10000 +
src.hundredsOfMicroseconds * 100 + src.microseconds;
return dest;
}
kernel_timestamp *udf_time_to_stamp(kernel_timestamp * dest, struct timespec ts)
{
long int days, rem, y;
const unsigned short int *ip;
int16_t offset;
offset = -sys_tz.tz_minuteswest;
if (!dest)
return NULL;
dest->typeAndTimezone = 0x1000 | (offset & 0x0FFF);
ts.tv_sec += offset * 60;
days = ts.tv_sec / SECS_PER_DAY;
rem = ts.tv_sec % SECS_PER_DAY;
dest->hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
dest->minute = rem / 60;
dest->second = rem % 60;
y = 1970;
#define DIV(a,b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
while (days < 0 || days >= (__isleap(y) ? 366 : 365)) {
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
dest->year = y;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int)ip[y]; --y)
continue;
days -= ip[y];
dest->month = y + 1;
dest->day = days + 1;
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);
return dest;
}
/* EOF */