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[timezone] implement timezone

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Meco Man
2021-07-18 14:34:35 +08:00
parent 6c5546cc9c
commit 0f48449b5e
3 changed files with 42 additions and 10 deletions
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41
components/libc/compilers/common/time.c
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@@ -18,6 +18,7 @@
* 2021-02-12 Meco Man move all of the functions located in <clock_time.c> to this file
* 2021-03-15 Meco Man fixed a bug of leaking memory in asctime()
* 2021-05-01 Meco Man support fixed timezone
* 2021-07-21 Meco Man implement that change/set timezone APIs
*/
#include "sys/time.h"
@@ -32,10 +33,6 @@
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifndef RT_LIBC_FIXED_TIMEZONE
#define RT_LIBC_FIXED_TIMEZONE 8 /* UTC+8 */
#endif
/* seconds per day */
#define SPD 24*60*60
@@ -202,7 +199,7 @@ struct tm *gmtime_r(const time_t *timep, struct tm *r)
r->tm_mon = i;
r->tm_mday += work - __spm[i];
r->tm_isdst = 0;
r->tm_isdst = rt_tz_is_dst();
return r;
}
RTM_EXPORT(gmtime_r);
@@ -218,7 +215,7 @@ struct tm* localtime_r(const time_t* t, struct tm* r)
{
time_t local_tz;
local_tz = *t + RT_LIBC_FIXED_TIMEZONE * 3600;
local_tz = *t + rt_tz_get() * 3600;
return gmtime_r(&local_tz, r);
}
RTM_EXPORT(localtime_r);
@@ -235,7 +232,7 @@ time_t mktime(struct tm * const t)
time_t timestamp;
timestamp = timegm(t);
timestamp = timestamp - 3600 * RT_LIBC_FIXED_TIMEZONE;
timestamp = timestamp - 3600 * rt_tz_get();
return timestamp;
}
RTM_EXPORT(mktime);
@@ -426,7 +423,7 @@ int gettimeofday(struct timeval *tv, struct timezone *tz)
if(tz != RT_NULL)
{
tz->tz_dsttime = DST_NONE;
tz->tz_minuteswest = -(RT_LIBC_FIXED_TIMEZONE * 60);
tz->tz_minuteswest = -(rt_tz_get() * 60);
}
if (tv != RT_NULL && get_timeval(tv) == RT_EOK)
@@ -651,3 +648,31 @@ int clock_time_to_tick(const struct timespec *time)
RTM_EXPORT(clock_time_to_tick);
#endif /* RT_USING_POSIX */
/* timezone APIs (Not standard LIBC APIs) */
#ifndef RT_LIBC_DEFAULT_TIMEZONE
#define RT_LIBC_DEFAULT_TIMEZONE 8
#endif
#include <rthw.h>
volatile static rt_int8_t rt_current_timezone = RT_LIBC_DEFAULT_TIMEZONE;
void rt_tz_set(rt_int8_t tz)
{
register rt_base_t level;
level = rt_hw_interrupt_disable();
rt_current_timezone = tz;
rt_hw_interrupt_enable(level);
}
rt_int8_t rt_tz_get(void)
{
return rt_current_timezone;
}
rt_int8_t rt_tz_is_dst(void)
{
return 0;
}