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Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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Linus Torvalds
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/* 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 to unix time
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* 10/04/98: added new table-based lookup after seeing how ugly 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 <linux/types.h>
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#include <linux/kernel.h>
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#include "udfdecl.h"
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#define EPOCH_YEAR 1970
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#ifndef __isleap
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/* Nonzero if YEAR is a leap year (every 4 years,
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except every 100th isn't, and every 400th is). */
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#define __isleap(year) \
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((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
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#endif
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/* How many days come before each month (0-12). */
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const unsigned short int __mon_yday[2][13] =
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{
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/* Normal years. */
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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/* Leap years. */
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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#define MAX_YEAR_SECONDS 69
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#define SPD 0x15180 /*3600*24*/
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#define SPY(y,l,s) (SPD * (365*y+l)+s)
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static time_t year_seconds[MAX_YEAR_SECONDS]= {
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/*1970*/ SPY( 0, 0,0), SPY( 1, 0,0), SPY( 2, 0,0), SPY( 3, 1,0),
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/*1974*/ SPY( 4, 1,0), SPY( 5, 1,0), SPY( 6, 1,0), SPY( 7, 2,0),
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/*1978*/ SPY( 8, 2,0), SPY( 9, 2,0), SPY(10, 2,0), SPY(11, 3,0),
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/*1982*/ SPY(12, 3,0), SPY(13, 3,0), SPY(14, 3,0), SPY(15, 4,0),
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/*1986*/ SPY(16, 4,0), SPY(17, 4,0), SPY(18, 4,0), SPY(19, 5,0),
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/*1990*/ SPY(20, 5,0), SPY(21, 5,0), SPY(22, 5,0), SPY(23, 6,0),
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/*1994*/ SPY(24, 6,0), SPY(25, 6,0), SPY(26, 6,0), SPY(27, 7,0),
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/*1998*/ SPY(28, 7,0), SPY(29, 7,0), SPY(30, 7,0), SPY(31, 8,0),
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/*2002*/ SPY(32, 8,0), SPY(33, 8,0), SPY(34, 8,0), SPY(35, 9,0),
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/*2006*/ SPY(36, 9,0), SPY(37, 9,0), SPY(38, 9,0), SPY(39,10,0),
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/*2010*/ SPY(40,10,0), SPY(41,10,0), SPY(42,10,0), SPY(43,11,0),
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/*2014*/ SPY(44,11,0), SPY(45,11,0), SPY(46,11,0), SPY(47,12,0),
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/*2018*/ SPY(48,12,0), SPY(49,12,0), SPY(50,12,0), SPY(51,13,0),
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/*2022*/ SPY(52,13,0), SPY(53,13,0), SPY(54,13,0), SPY(55,14,0),
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/*2026*/ SPY(56,14,0), SPY(57,14,0), SPY(58,14,0), SPY(59,15,0),
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/*2030*/ SPY(60,15,0), SPY(61,15,0), SPY(62,15,0), SPY(63,16,0),
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/*2034*/ SPY(64,16,0), SPY(65,16,0), SPY(66,16,0), SPY(67,17,0),
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/*2038*/ SPY(68,17,0)
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};
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extern struct timezone sys_tz;
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#define SECS_PER_HOUR (60 * 60)
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#define SECS_PER_DAY (SECS_PER_HOUR * 24)
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time_t *
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udf_stamp_to_time(time_t *dest, long *dest_usec, kernel_timestamp src)
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{
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int yday;
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uint8_t type = src.typeAndTimezone >> 12;
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int16_t offset;
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if (type == 1)
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{
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offset = src.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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}
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else
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offset = 0;
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if ((src.year < EPOCH_YEAR) ||
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(src.year > EPOCH_YEAR+MAX_YEAR_SECONDS))
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{
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*dest = -1;
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*dest_usec = -1;
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return NULL;
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}
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*dest = year_seconds[src.year - EPOCH_YEAR];
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*dest -= offset * 60;
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yday = ((__mon_yday[__isleap (src.year)]
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[src.month-1]) + (src.day-1));
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*dest += ( ( (yday* 24) + src.hour ) * 60 + src.minute ) * 60 + src.second;
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*dest_usec = src.centiseconds * 10000 + src.hundredsOfMicroseconds * 100 + src.microseconds;
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return dest;
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}
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kernel_timestamp *
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udf_time_to_stamp(kernel_timestamp *dest, struct timespec ts)
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{
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long int days, rem, y;
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const unsigned short int *ip;
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int16_t offset;
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offset = -sys_tz.tz_minuteswest;
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if (!dest)
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return NULL;
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dest->typeAndTimezone = 0x1000 | (offset & 0x0FFF);
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ts.tv_sec += offset * 60;
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days = ts.tv_sec / SECS_PER_DAY;
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rem = ts.tv_sec % SECS_PER_DAY;
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dest->hour = rem / SECS_PER_HOUR;
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rem %= SECS_PER_HOUR;
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dest->minute = rem / 60;
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dest->second = rem % 60;
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y = 1970;
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#define DIV(a,b) ((a) / (b) - ((a) % (b) < 0))
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#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
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while (days < 0 || days >= (__isleap(y) ? 366 : 365))
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{
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long int yg = y + days / 365 - (days % 365 < 0);
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/* Adjust DAYS and Y to match the guessed year. */
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days -= ((yg - y) * 365
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+ LEAPS_THRU_END_OF (yg - 1)
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- LEAPS_THRU_END_OF (y - 1));
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y = yg;
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}
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dest->year = y;
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ip = __mon_yday[__isleap(y)];
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for (y = 11; days < (long int) ip[y]; --y)
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continue;
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days -= ip[y];
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dest->month = y + 1;
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dest->day = days + 1;
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dest->centiseconds = ts.tv_nsec / 10000000;
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dest->hundredsOfMicroseconds = (ts.tv_nsec / 1000 - 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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return dest;
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}
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/* EOF */
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