11da177e4SLinus Torvalds /* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. 21da177e4SLinus Torvalds This file is part of the GNU C Library. 31da177e4SLinus Torvalds Contributed by Paul Eggert (eggert@twinsun.com). 41da177e4SLinus Torvalds 51da177e4SLinus Torvalds The GNU C Library is free software; you can redistribute it and/or 61da177e4SLinus Torvalds modify it under the terms of the GNU Library General Public License as 71da177e4SLinus Torvalds published by the Free Software Foundation; either version 2 of the 81da177e4SLinus Torvalds License, or (at your option) any later version. 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds The GNU C Library is distributed in the hope that it will be useful, 111da177e4SLinus Torvalds but WITHOUT ANY WARRANTY; without even the implied warranty of 121da177e4SLinus Torvalds MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 131da177e4SLinus Torvalds Library General Public License for more details. 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds You should have received a copy of the GNU Library General Public 161da177e4SLinus Torvalds License along with the GNU C Library; see the file COPYING.LIB. If not, 171da177e4SLinus Torvalds write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 181da177e4SLinus Torvalds Boston, MA 02111-1307, USA. */ 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds /* 214b11111aSMarcin Slusarz * dgb 10/02/98: ripped this from glibc source to help convert timestamps 224b11111aSMarcin Slusarz * to unix time 234b11111aSMarcin Slusarz * 10/04/98: added new table-based lookup after seeing how ugly 244b11111aSMarcin Slusarz * the gnu code is 251da177e4SLinus Torvalds * blf 09/27/99: ripped out all the old code and inserted new table from 261da177e4SLinus Torvalds * John Brockmeyer (without leap second corrections) 271da177e4SLinus Torvalds * rewrote udf_stamp_to_time and fixed timezone accounting in 2828de7948SCyrill Gorcunov * udf_time_to_stamp. 291da177e4SLinus Torvalds */ 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds /* 321da177e4SLinus Torvalds * We don't take into account leap seconds. This may be correct or incorrect. 331da177e4SLinus Torvalds * For more NIST information (especially dealing with leap seconds), see: 341da177e4SLinus Torvalds * http://www.boulder.nist.gov/timefreq/pubs/bulletin/leapsecond.htm 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds 3778ace70cSJoe Perches #include "udfdecl.h" 3878ace70cSJoe Perches 391da177e4SLinus Torvalds #include <linux/types.h> 401da177e4SLinus Torvalds #include <linux/kernel.h> 413c399fa4SJan Kara #include <linux/time.h> 421da177e4SLinus Torvalds 430220eddaSDeepa Dinamani void 445ca4e4beSPekka Enberg udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src) 451da177e4SLinus Torvalds { 4656774805SMarcin Slusarz u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone); 4756774805SMarcin Slusarz u16 year = le16_to_cpu(src.year); 4856774805SMarcin Slusarz uint8_t type = typeAndTimezone >> 12; 491da177e4SLinus Torvalds int16_t offset; 501da177e4SLinus Torvalds 51cb00ea35SCyrill Gorcunov if (type == 1) { 5256774805SMarcin Slusarz offset = typeAndTimezone << 4; 531da177e4SLinus Torvalds /* sign extent offset */ 541da177e4SLinus Torvalds offset = (offset >> 4); 551da177e4SLinus Torvalds if (offset == -2047) /* unspecified offset */ 561da177e4SLinus Torvalds offset = 0; 57cbf5676aSmarcin.slusarz@gmail.com } else 581da177e4SLinus Torvalds offset = 0; 591da177e4SLinus Torvalds 60fd3cfad3SJan Kara dest->tv_sec = mktime64(year, src.month, src.day, src.hour, src.minute, 61fd3cfad3SJan Kara src.second); 62cbf5676aSmarcin.slusarz@gmail.com dest->tv_sec -= offset * 60; 63cbf5676aSmarcin.slusarz@gmail.com dest->tv_nsec = 1000 * (src.centiseconds * 10000 + 64cbf5676aSmarcin.slusarz@gmail.com src.hundredsOfMicroseconds * 100 + src.microseconds); 65d5bd8213SJan Kara /* 66d5bd8213SJan Kara * Sanitize nanosecond field since reportedly some filesystems are 67d5bd8213SJan Kara * recorded with bogus sub-second values. 68d5bd8213SJan Kara */ 69d5bd8213SJan Kara dest->tv_nsec %= NSEC_PER_SEC; 701da177e4SLinus Torvalds } 711da177e4SLinus Torvalds 720220eddaSDeepa Dinamani void 735ca4e4beSPekka Enberg udf_time_to_disk_stamp(struct timestamp *dest, struct timespec ts) 741da177e4SLinus Torvalds { 753c399fa4SJan Kara long seconds; 761da177e4SLinus Torvalds int16_t offset; 773c399fa4SJan Kara struct tm tm; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds offset = -sys_tz.tz_minuteswest; 801da177e4SLinus Torvalds 8156774805SMarcin Slusarz dest->typeAndTimezone = cpu_to_le16(0x1000 | (offset & 0x0FFF)); 821da177e4SLinus Torvalds 833c399fa4SJan Kara seconds = ts.tv_sec + offset * 60; 843c399fa4SJan Kara time64_to_tm(seconds, 0, &tm); 853c399fa4SJan Kara dest->year = cpu_to_le16(tm.tm_year + 1900); 863c399fa4SJan Kara dest->month = tm.tm_mon + 1; 873c399fa4SJan Kara dest->day = tm.tm_mday; 883c399fa4SJan Kara dest->hour = tm.tm_hour; 893c399fa4SJan Kara dest->minute = tm.tm_min; 903c399fa4SJan Kara dest->second = tm.tm_sec; 911da177e4SLinus Torvalds dest->centiseconds = ts.tv_nsec / 10000000; 924b11111aSMarcin Slusarz dest->hundredsOfMicroseconds = (ts.tv_nsec / 1000 - 934b11111aSMarcin Slusarz dest->centiseconds * 10000) / 100; 9428de7948SCyrill Gorcunov dest->microseconds = (ts.tv_nsec / 1000 - dest->centiseconds * 10000 - 951da177e4SLinus Torvalds dest->hundredsOfMicroseconds * 100); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* EOF */ 99