83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
/****************************************************************************
|
|
* libc/time/lib_ctime.c
|
|
*
|
|
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <time.h>
|
|
|
|
#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: ctime
|
|
*
|
|
* 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.
|
|
*
|
|
* Returned Value:
|
|
* One success a pointer to the string is returned; on failure, NULL is
|
|
* returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR char *ctime(FAR const time_t *timep)
|
|
{
|
|
#ifdef CONFIG_LIBC_LOCALTIME
|
|
/* Section 4.12.3.2 of X3.159-1989 requires that
|
|
* The ctime function converts the calendar time pointed to by timer
|
|
* to local time in the form of a string. It is equivalent to
|
|
* asctime(localtime(timer))
|
|
*/
|
|
|
|
return asctime(localtime(timep));
|
|
#else
|
|
return asctime(gmtime(timep));
|
|
#endif
|
|
}
|
|
|
|
#endif /* CONFIG_LIBC_LOCALTIME || CONFIG_TIME_EXTENDED */
|