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sortix--sortix/libmaxsi/time.cpp
2012-05-29 22:17:27 +02:00

113 lines
2.9 KiB
C++

/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011, 2012.
This file is part of LibMaxsi.
LibMaxsi is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
LibMaxsi 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 LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
time.cpp
Useful time functions.
*******************************************************************************/
#include <libmaxsi/platform.h>
#include <libmaxsi/string.h>
#include <libmaxsi/memory.h>
#include <libmaxsi/syscall.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>
namespace Maxsi
{
namespace Time
{
DEFN_SYSCALL1(int, SysUptime, SYSCALL_UPTIME, uintmax_t*);
extern "C" int uptime(uintmax_t* usecssinceboot)
{
return SysUptime(usecssinceboot);
}
extern "C" clock_t clock(void)
{
errno = ENOTSUP;
return -1;
}
extern "C" int gettimeofday(struct timeval* tp, void* /*tzp*/)
{
uintmax_t sinceboot;
uptime(&sinceboot);
tp->tv_sec = sinceboot / 1000000ULL;
tp->tv_usec = sinceboot % 1000000ULL;
return 0;
}
extern "C" time_t time(time_t* t)
{
struct timeval tv;
gettimeofday(&tv, NULL);
time_t result = tv.tv_sec;
return t ? *t = result : result;
}
extern "C" struct tm* localtime_r(const time_t* timer, struct tm* ret)
{
time_t time = *timer;
ret->tm_sec = time % 60; // No leap seconds.
ret->tm_min = (time / 60) % 60;
ret->tm_hour = (time / 60 / 60) % 24;
ret->tm_mday = 0;
ret->tm_mon = 0;
ret->tm_year = 0;
ret->tm_wday = 0;
ret->tm_isdst = 0;
return ret;
}
extern "C" struct tm* gmtime_r(const time_t* timer, struct tm* ret)
{
return localtime_r(timer, ret);
}
// TODO: Who the hell designed the below two functions? I vote that
// these be removed from Sortix soon - although that'd require fixing
// a lot of applications..
extern "C" struct tm* localtime(const time_t* timer)
{
static struct tm hack_localtime_ret;
return localtime_r(timer, &hack_localtime_ret);
}
extern "C" struct tm* gmtime(const time_t* timer)
{
static struct tm hack_gmtime_ret;
return gmtime_r(timer, &hack_gmtime_ret);
}
extern "C" char* ctime(const time_t* /*timep*/)
{
return (char*) "ctime(3) is not implemented";
}
extern "C" int utime(const char* filepath, const struct utimbuf* times)
{
// TODO: Sure, I did that! There is no kernel support for this yet.
return 0;
}
}
}