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https://github.com/jerryscript-project/jerryscript.git
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3afc4b0b85
The previous jerry_port interface did not allow timezones to be handled correctly, even if the host system was up to the task. This PR changes the jerry_port interface to allow a completely correct implementation to exist, and provides one (for Linux/BSD systems) in default-date.c. Fixes #1661 JerryScript-DCO-1.0-Signed-off-by: crazy2be crazy1be@gmail.com
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_TM_GMTOFF
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#include <time.h>
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#endif /* HAVE_TM_GMTOFF */
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#ifdef __GNUC__
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#include <sys/time.h>
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#endif /* __GNUC__ */
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#include "jerryscript-port.h"
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#include "jerryscript-port-default.h"
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/**
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* Default implementation of jerry_port_get_local_time_zone_adjustment. Uses the 'tm_gmtoff' field
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* of 'struct tm' (a GNU extension) filled by 'localtime_r' if available on the
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* system, does nothing otherwise.
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*
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* @return offset between UTC and local time at the given unix timestamp, if
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* available. Otherwise, returns 0, assuming UTC time.
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*/
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double jerry_port_get_local_time_zone_adjustment (double unix_ms, /**< ms since unix epoch */
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bool is_utc) /**< is the time above in UTC? */
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{
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#ifdef HAVE_TM_GMTOFF
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struct tm tm;
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time_t now = (time_t) (unix_ms / 1000);
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localtime_r (&now, &tm);
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if (!is_utc)
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{
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now -= tm.tm_gmtoff;
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localtime_r (&now, &tm);
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}
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return ((double) tm.tm_gmtoff) * 1000;
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#else /* !HAVE_TM_GMTOFF */
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(void) unix_ms;
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(void) is_utc;
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return 0.0;
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#endif /* HAVE_TM_GMTOFF */
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} /* jerry_port_get_local_time_zone_adjustment */
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/**
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* Default implementation of jerry_port_get_current_time. Uses 'gettimeofday' if
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* available on the system, does nothing otherwise.
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*
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* @return milliseconds since Unix epoch - if 'gettimeofday' is available and
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* executed successfully,
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* 0 - otherwise.
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*/
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double jerry_port_get_current_time (void)
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{
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#ifdef __GNUC__
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struct timeval tv;
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if (gettimeofday (&tv, NULL) == 0)
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{
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return ((double) tv.tv_sec) * 1000.0 + ((double) tv.tv_usec) / 1000.0;
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}
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#endif /* __GNUC__ */
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return 0.0;
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} /* jerry_port_get_current_time */
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