diff options
Diffstat (limited to 'cpukit/rtems/src/clockgettod.c')
| -rw-r--r-- | cpukit/rtems/src/clockgettod.c | 62 |
1 files changed, 42 insertions, 20 deletions
diff --git a/cpukit/rtems/src/clockgettod.c b/cpukit/rtems/src/clockgettod.c index dea136d477..06d8edbee9 100644 --- a/cpukit/rtems/src/clockgettod.c +++ b/cpukit/rtems/src/clockgettod.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + /** * @file * @@ -11,9 +13,26 @@ * COPYRIGHT (c) 1989-2007. * On-Line Applications Research Corporation (OAR). * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H @@ -32,8 +51,6 @@ #define RTEMS_DAYS_PER_YEAR (365UL) #define RTEMS_YEAR_BASE (1970UL) -extern const uint16_t _TOD_Days_to_date[2][13]; - static bool _Leap_year( uint32_t year ) @@ -64,9 +81,9 @@ static uint32_t _Year_day_as_month( uint32_t month = 0; if ( _Leap_year( year ) ) - days_to_date = _TOD_Days_to_date[1]; - else days_to_date = _TOD_Days_to_date[0]; + else + days_to_date = _TOD_Days_to_date[1]; days_to_date += 2; @@ -83,7 +100,7 @@ static uint32_t _Year_day_as_month( } rtems_status_code rtems_clock_get_tod( - rtems_time_of_day *time_buffer + rtems_time_of_day *time_of_day ) { struct timeval now; @@ -93,7 +110,7 @@ rtems_status_code rtems_clock_get_tod( uint32_t year_days; uint32_t leap_years; - if ( !time_buffer ) + if ( !time_of_day ) return RTEMS_INVALID_ADDRESS; if ( !_TOD_Is_set() ) @@ -102,9 +119,14 @@ rtems_status_code rtems_clock_get_tod( /* Obtain the current time */ _TOD_Get_timeval( &now ); - /* How many days and how many seconds in the day ? */ - days = now.tv_sec / RTEMS_SECS_PER_DAY; - day_secs = now.tv_sec % RTEMS_SECS_PER_DAY; + /* + * How many days and how many seconds in the day? + * + * A 32-bit integer can represent enough days for several 1000 years. When + * the current time is valid, the integer conversions below are well defined. + */ + days = (uint32_t) ( now.tv_sec / RTEMS_SECS_PER_DAY ); + day_secs = (uint32_t) ( now.tv_sec % RTEMS_SECS_PER_DAY ); /* How many non-leap year years ? */ year = ( days / RTEMS_DAYS_PER_YEAR ) + RTEMS_YEAR_BASE; @@ -123,14 +145,14 @@ rtems_status_code rtems_clock_get_tod( } } - time_buffer->year = year; - time_buffer->month = _Year_day_as_month( year, &year_days ) + 1; - time_buffer->day = year_days + 1; - time_buffer->hour = day_secs / RTEMS_SECS_PER_HOUR; - time_buffer->minute = day_secs % RTEMS_SECS_PER_HOUR; - time_buffer->second = time_buffer->minute % RTEMS_SECS_PER_MINUTE; - time_buffer->minute = time_buffer->minute / RTEMS_SECS_PER_MINUTE; - time_buffer->ticks = now.tv_usec / + time_of_day->year = year; + time_of_day->month = _Year_day_as_month( year, &year_days ) + 1; + time_of_day->day = year_days + 1; + time_of_day->hour = day_secs / RTEMS_SECS_PER_HOUR; + time_of_day->minute = day_secs % RTEMS_SECS_PER_HOUR; + time_of_day->second = time_of_day->minute % RTEMS_SECS_PER_MINUTE; + time_of_day->minute = time_of_day->minute / RTEMS_SECS_PER_MINUTE; + time_of_day->ticks = now.tv_usec / rtems_configuration_get_microseconds_per_tick( ); return RTEMS_SUCCESSFUL; |