Diff: platform/mbed_mktime.h

Revision:

167:e84263d55307

Child:

178:79309dc6340a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/platform/mbed_mktime.h	Wed Jun 21 17:46:44 2017 +0100
@@ -0,0 +1,98 @@
+
+/** \addtogroup platform */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2017-2017 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MKTIME_H
+#define MBED_MKTIME_H
+
+#include <time.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Compute if a year is a leap year or not.
+ *
+ * @param year The year to test it shall be in the range [70:138]. Year 0 is
+ * translated into year 1900 CE.
+ * @return true if the year in input is a leap year and false otherwise.
+ * @note - For use by the HAL only
+ */
+bool _rtc_is_leap_year(int year);
+
+/* Convert a calendar time into time since UNIX epoch as a time_t.
+ *
+ * This function is a thread safe (partial) replacement for mktime. It is
+ * tailored around RTC peripherals needs and is not by any mean a complete
+ * replacement of mktime.
+ *
+ * @param calendar_time The calendar time to convert into a time_t since epoch.
+ * The fields from tm used for the computation are:
+ *   - tm_sec
+ *   - tm_min
+ *   - tm_hour
+ *   - tm_mday
+ *   - tm_mon
+ *   - tm_year
+ * Other fields are ignored and won't be renormalized by a call to this function.
+ * A valid calendar time is comprised between the 1st january of 1970 at
+ * 00:00:00 and the 19th of january 2038 at 03:14:07.
+ *
+ * @return The calendar time as seconds since UNIX epoch if the input is in the
+ * valid range. Otherwise ((time_t) -1).
+ *
+ * @note Leap seconds are not supported.
+ * @note Values in output range from 0 to INT_MAX.
+ * @note - For use by the HAL only
+ */
+time_t _rtc_mktime(const struct tm* calendar_time);
+
+/* Convert a given time in seconds since epoch into calendar time.
+ *
+ * This function is a thread safe (partial) replacement for localtime. It is
+ * tailored around RTC peripherals specification and is not by any means a
+ * complete of localtime.
+ *
+ * @param timestamp The time (in seconds) to convert into calendar time. Valid
+ * input are in the range [0 : INT32_MAX].
+ * @param calendar_time Pointer to the object which will contain the result of
+ * the conversion. The tm fields filled by this function are:
+ *   - tm_sec
+ *   - tm_min
+ *   - tm_hour
+ *   - tm_mday
+ *   - tm_mon
+ *   - tm_year
+ *   - tm_wday
+ *   - tm_yday
+ * The object remains untouched if the time in input is invalid.
+ * @return true if the conversion was successful, false otherwise.
+ *
+ * @note - For use by the HAL only
+ */
+bool _rtc_localtime(time_t timestamp, struct tm* calendar_time);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBED_MKTIME_H */
+
+/** @}*/