janwas
2a0025bc28
(hopefully fixes often-reported crashes on 64-bit Linux) remove lib/precompiled.cpp to simplify PCH handling in build system This was SVN commit r7006.
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* timestamp conversion: DOS FAT <-> Unix time_t
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*/
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#include "precompiled.h"
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#include "fat_time.h"
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#include <ctime>
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#include "lib/bits.h"
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time_t time_t_from_FAT(u32 fat_timedate)
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{
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const u32 fat_time = bits(fat_timedate, 0, 15);
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const u32 fat_date = bits(fat_timedate, 16, 31);
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struct tm t; // struct tm format:
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t.tm_sec = bits(fat_time, 0,4) * 2; // [0,59]
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t.tm_min = bits(fat_time, 5,10); // [0,59]
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t.tm_hour = bits(fat_time, 11,15); // [0,23]
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t.tm_mday = bits(fat_date, 0,4); // [1,31]
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t.tm_mon = bits(fat_date, 5,8) - 1; // [0,11]
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t.tm_year = bits(fat_date, 9,15) + 80; // since 1900
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t.tm_isdst = -1; // unknown - let libc determine
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// otherwise: totally bogus, and at the limit of 32-bit time_t
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debug_assert(t.tm_year < 138);
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time_t ret = mktime(&t);
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debug_assert(ret != (time_t)-1); // mktime shouldn't fail
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return ret;
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}
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u32 FAT_from_time_t(time_t time)
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{
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// (values are adjusted for DST)
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struct tm* t = localtime(&time);
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const u16 fat_time = u16(
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(t->tm_sec/2) | // 5
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(u16(t->tm_min) << 5) | // 6
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(u16(t->tm_hour) << 11) // 5
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);
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const u16 fat_date = u16(
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(t->tm_mday) | // 5
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(u16(t->tm_mon+1) << 5) | // 4
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(u16(t->tm_year-80) << 9) // 7
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);
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u32 fat_timedate = u32_from_u16(fat_date, fat_time);
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return fat_timedate;
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}
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