72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/****************************************************************************
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* libs/libc/time/lib_daysbeforemonth.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/clock.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const uint16_t g_daysbeforemonth[13] =
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{
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: clock_daysbeforemonth
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*
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* Description:
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* Get the number of days that occurred before the beginning of the
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* month.
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*
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* Input Parameters:
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* month - The month in the form of tm_mon, that is a range of 0-11.
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* leapyear - True if leap year and there are 29 days in February.
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* NOTE the month=1 is February.
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*
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* Returned Value:
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* The number of days that occurred before the month
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*
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****************************************************************************/
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int clock_daysbeforemonth(int month, bool leapyear)
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{
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int retval = g_daysbeforemonth[month];
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if (month >= 2 && leapyear)
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{
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retval++;
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}
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return retval;
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}
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