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Diffstat (limited to 'lotuswordpro/source/filter/localtime.cxx')
| -rw-r--r-- | lotuswordpro/source/filter/localtime.cxx | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/lotuswordpro/source/filter/localtime.cxx b/lotuswordpro/source/filter/localtime.cxx new file mode 100644 index 000000000..3974f2fe5 --- /dev/null +++ b/lotuswordpro/source/filter/localtime.cxx @@ -0,0 +1,187 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * The Contents of this file are made available subject to the terms of + * either of the following licenses + * + * - GNU Lesser General Public License Version 2.1 + * - Sun Industry Standards Source License Version 1.1 + * + * Sun Microsystems Inc., October, 2000 + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2000 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * + * Sun Industry Standards Source License Version 1.1 + * ================================================= + * The contents of this file are subject to the Sun Industry Standards + * Source License Version 1.1 (the "License"); You may not use this file + * except in compliance with the License. You may obtain a copy of the + * License at http://www.openoffice.org/license.html. + * + * Software provided under this License is provided on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, + * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, + * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. + * See the License for the specific provisions governing your rights and + * obligations concerning the Software. + * + * The Initial Developer of the Original Code is: IBM Corporation + * + * Copyright: 2008 by IBM Corporation + * + * All Rights Reserved. + * + * Contributor(s): _______________________________________ + * + * + ************************************************************************/ +#include <localtime.hxx> +#include <limits.h> +#include <unicode/timezone.h> +#include <memory> + +const tools::Long DAY_SEC = 24 * 60 * 60; +const tools::Long YEAR_SEC = 365 * DAY_SEC; +const tools::Long FOURYEAR_SEC = 4 * YEAR_SEC + DAY_SEC; +#ifndef LONG_MAX +const long LONG_MAX = 2147483647; +#endif +//01-01-70 was a Thursday +const tools::Long BASE_DOW = 4; + +bool LtgGmTime(tools::Long rtime, LtTm& rtm) +{ + if (rtime < 0) + { + return false; + } + //is-current-year-a-leap-year flag + int islpyr = 0; + + tools::Long tmptim; + tools::Long caltim = rtime; + tmptim = static_cast<tools::Long>(caltim / FOURYEAR_SEC); + caltim -= tmptim * FOURYEAR_SEC; + + //Determine which year of the interval + + // 1970, 1974, 1978,...,etc. + tmptim = (tmptim * 4) + 70; + + if (caltim >= YEAR_SEC) + { + //1971, 1975, 1979,...,etc. + tmptim++; + caltim -= YEAR_SEC; + + if (caltim >= YEAR_SEC) + { + // 1972, 1976, 1980,...,etc. + tmptim++; + caltim -= YEAR_SEC; + + //Note, it takes 366 days-worth of seconds to get past a leap year. + if (caltim >= (YEAR_SEC + DAY_SEC)) + { + //1973, 1977, 1981,...,etc. + tmptim++; + caltim -= (YEAR_SEC + DAY_SEC); + } + else + { + //In a leap year after all, set the flag. + islpyr++; + } + } + } + + //tmptim now holds the value for tm_year. caltim now holds the + //number of elapsed seconds since the beginning of that year. + + rtm.tm_year = tmptim; + + //Determine days since January 1 (0 - 365). This is the tm_yday value. + //Leave caltim with number of elapsed seconds in that day. + + rtm.tm_yday = static_cast<tools::Long>(caltim / DAY_SEC); + caltim -= rtm.tm_yday * DAY_SEC; + + //Determine months since January (0 - 11) and day of month (1 - 31) + + tools::Long const* mdays; + if (islpyr) + { + static tools::Long const lpdays[] + = { -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }; + mdays = lpdays; + } + else + { + static tools::Long const days[] + = { -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364 }; + mdays = days; + } + + for (tmptim = 1; mdays[tmptim] < rtm.tm_yday; tmptim++) + ; + + rtm.tm_mon = --tmptim; + + rtm.tm_mday = rtm.tm_yday - mdays[tmptim]; + + //Determine days since Sunday (0 - 6) + + rtm.tm_wday = (static_cast<tools::Long>(rtime / DAY_SEC) + BASE_DOW) % 7; + + //Determine hours since midnight (0 - 23), minutes after the hour + //(0 - 59), and seconds after the minute (0 - 59). + + rtm.tm_hour = static_cast<tools::Long>(caltim / 3600); + caltim -= rtm.tm_hour * 3600; + + rtm.tm_min = static_cast<tools::Long>(caltim / 60); + rtm.tm_sec = static_cast<tools::Long>(caltim - (rtm.tm_min) * 60); + + //adjust year & month + rtm.tm_year += 1900; + ++(rtm.tm_mon); + + return true; +}; +bool LtgLocalTime(tools::Long rtime, LtTm& rtm) +{ + if (rtime < 0) + { + return false; + } + + if ((rtime > 3 * DAY_SEC) && (rtime < LONG_MAX - 3 * DAY_SEC)) + { + std::unique_ptr<icu::TimeZone> pLocalZone(icu::TimeZone::createDefault()); + tools::Long offset = (pLocalZone->getRawOffset()) / 1000; + pLocalZone.reset(); + tools::Long ltime = rtime + offset; + return LtgGmTime(ltime, rtm); + } + return false; +}; + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |