incubator-nuttx/libs/libc/time/lib_ctimer.c

61 lines
2.3 KiB
C

/****************************************************************************
* libs/libc/time/lib_ctimer.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <time.h>
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ctime_r
*
* Description:
* ctime and ctime_r convert the time provided in seconds since the
* epoch to a string representation. ctime is not re-entrant; ctime_r is
* re-entrant.
*
* Input Parameters:
* timep - The current time represented as seconds since the epoch.
* buf - A user provided buffer to receive the 26 character time string.
*
* Returned Value:
* On success, the pointer to the 'buf' is returned; on failure, NULL is
* returned.
*
****************************************************************************/
FAR char *ctime_r(FAR const time_t *timep, FAR char *buf)
{
struct tm tm;
return asctime_r(localtime_r(timep, &tm), buf);
}