95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
/****************************************************************************
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* libs/libc/time/lib_asctimer.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <stdio.h>
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#include <time.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Note: These strings duplicate other definitions in other files. These
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* definitions could be combined to save a little FLASH space.
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*/
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static const char * const g_wday_name[7] =
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{
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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static const char * const g_mon_name[12] =
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{
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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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: asctime_r
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*
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* Description:
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* asctime and asctime_r convert the time provided in a struct tm to a
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* string representation. asctime is not re-entrant; asctime_r is re-
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* entrant.
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*
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* Input Parameters:
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* tp - Pointer to the time to be converted.
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* buf - A user provided buffer to receive the 26 character time string.
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*
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* Returned Value:
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* One success, the pointer to the 'buf' is returned; on failure, NULL is
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* returned.
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*
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****************************************************************************/
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FAR char *asctime_r(FAR const struct tm *tp, FAR char *buf)
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{
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snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
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g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon],
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tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec,
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1900 + tp->tm_year);
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return buf;
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}
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